feat(editor): highlight duplicate matches in mermaid editor

feat(editor): highlight TTD assistant responses
2026-03-24 16:16:44 +01:00 · 2026-03-24 16:14:26 +01:00
157 changed files with 2077 additions and 6804 deletions
@@ -1,4 +1,4 @@
-FROM node:24-bullseye
+FROM node:18-bullseye

 # Vite wants to open the browser using `open`, so we
 # need to install those utils.
@@ -9,11 +9,11 @@ jobs:
    runs-on: ubuntu-latest

    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/checkout@v2
        with:
          fetch-depth: 2
      - name: Setup Node.js
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        uses: actions/setup-node@v2
        with:
          node-version: 20.x
      - name: Set up publish access
@@ -9,5 +9,5 @@ jobs:
  build-docker:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/checkout@v2
      - run: docker build -t excalidraw .
@@ -11,7 +11,7 @@ jobs:
    runs-on: ubuntu-latest
    timeout-minutes: 3
    steps:
-      - uses: styfle/cancel-workflow-action@ce177499ccf9fd2aded3b0426c97e5434c2e8a73 # 0.6.0
+      - uses: styfle/cancel-workflow-action@0.6.0
        with:
          workflow_id: 400555, 400556, 905313, 1451724, 1710116, 3185001, 3438604
          access_token: ${{ secrets.GITHUB_TOKEN }}
@@ -7,10 +7,10 @@ jobs:
    runs-on: ubuntu-latest

    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/checkout@v2

      - name: Setup Node.js
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        uses: actions/setup-node@v2
        with:
          node-version: 20.x

@@ -10,12 +10,12 @@ jobs:
    runs-on: ubuntu-latest

    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/checkout@v4
        with:
          token: ${{ secrets.PUSH_TRANSLATIONS_COVERAGE_PAT }}

      - name: Setup Node.js
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        uses: actions/setup-node@v2
        with:
          node-version: 20.x

@@ -40,7 +40,7 @@ jobs:
          echo ::set-output name=body::$body

      - name: Update description with coverage
-        uses: kt3k/update-pr-description@1b35a6dcd84d81aa0bc1889610efdcde7f37b0c0 # v1.0.1
+        uses: kt3k/update-pr-description@v1.0.1
        with:
          pr_body: ${{ steps.getCommentBody.outputs.body }}
          pr_title: "chore: Update translations from Crowdin"
@@ -11,18 +11,18 @@ jobs:

    steps:
      - name: Checkout repository
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@v3
      - name: Login to DockerHub
-        uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc # v2
+        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
      - name: Set up QEMU
-        uses: docker/setup-qemu-action@c7c53464625b32c7a7e944ae62b3e17d2b600130 # v3
+        uses: docker/setup-qemu-action@v3
      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3
+        uses: docker/setup-buildx-action@v3
      - name: Build and push
-        uses: docker/build-push-action@ca052bb54ab0790a636c9b5f226502c73d547a25 # v5
+        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
@@ -6,97 +6,11 @@ on:
      - opened
      - edited
      - synchronize
-      - labeled
-      - unlabeled

 jobs:
  semantic:
    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: read
    steps:
-      - uses: amannn/action-semantic-pull-request@e32d7e603df1aa1ba07e981f2a23455dee596825 # v5
-        with:
-          requireScope: true
-          scopes: |
-            app
-            editor
-            packages/excalidraw
-            packages/utils
-            docker
-            repo
-          ignoreLabels: |
-            skip-semantic-title
+      - uses: amannn/action-semantic-pull-request@v5
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-  label-scope:
-    needs: semantic
-    if: github.event.pull_request.head.repo.full_name == github.repository
-    runs-on: ubuntu-latest
-    permissions:
-      issues: write
-      pull-requests: write
-    steps:
-      - name: Label scoped PR
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          PR_NUMBER: ${{ github.event.pull_request.number }}
-          PR_TITLE: ${{ github.event.pull_request.title }}
-          REPOSITORY: ${{ github.repository }}
-        run: |
-          set -euo pipefail
-
-          scope_labels=(s-app s-editor s-package)
-
-          readarray -t desired_labels < <(
-            node <<'NODE'
-          const title = process.env.PR_TITLE;
-          const match = title.match(/^[a-z]+(?:\(([^)]+)\))?!?:/i);
-          const scopes = match?.[1]?.split(",").map((scope) => scope.trim()) ?? [];
-          const labels = new Set();
-
-          for (const scope of scopes) {
-            if (scope === "app") {
-              labels.add("s-app");
-            } else if (scope === "editor") {
-              labels.add("s-editor");
-            } else if (scope.startsWith("packages/")) {
-              labels.add("s-package");
-            }
-          }
-
-          process.stdout.write([...labels].join("\n"));
-          NODE
-          )
-
-          should_apply_label() {
-            local label="$1"
-
-            for desired_label in "${desired_labels[@]}"; do
-              if [[ "$desired_label" == "$label" ]]; then
-                return 0
-              fi
-            done
-
-            return 1
-          }
-
-          for label in "${scope_labels[@]}"; do
-            if ! should_apply_label "$label"; then
-              gh api \
-                --method DELETE \
-                "repos/${REPOSITORY}/issues/${PR_NUMBER}/labels/${label}" \
-                --silent 2>/dev/null || true
-            fi
-          done
-
-          for label in "${desired_labels[@]}"; do
-            if ! gh api \
-              --method POST \
-              "repos/${REPOSITORY}/issues/${PR_NUMBER}/labels" \
-              --field "labels[]=${label}" \
-              --silent; then
-              echo "::warning::Could not apply ${label}. The workflow token likely does not have issues:write permission for this PR."
-            fi
-          done
@@ -9,9 +9,9 @@ jobs:
  sentry:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/checkout@v2
      - name: Setup Node.js
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        uses: actions/setup-node@v2
        with:
          node-version: 20.x
      - name: Install and build
@@ -10,9 +10,9 @@ jobs:
      CI_JOB_NUMBER: 1
    steps:
      - name: Checkout repository
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@v3
      - name: Setup Node.js
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        uses: actions/setup-node@v3
        with:
          node-version: 20.x
      - name: Install in packages/excalidraw
@@ -20,7 +20,7 @@ jobs:
        working-directory: packages/excalidraw
        env:
          CI: true
-      - uses: andresz1/size-limit-action@e7493a72a44b113341c0cf6186ab49c17c4b65c1 # v1
+      - uses: andresz1/size-limit-action@v1
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          build_script: build:esm
@@ -10,9 +10,9 @@ jobs:
      pull-requests: write

    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/checkout@v2
      - name: "Install Node"
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        uses: actions/setup-node@v2
        with:
          node-version: "20.x"
      - name: "Install Deps"
@@ -21,6 +21,6 @@ jobs:
        run: yarn test:coverage
      - name: "Report Coverage"
        if: always() # Also generate the report if tests are failing
-        uses: davelosert/vitest-coverage-report-action@2500dafcee7dd64f85ab689c0b83798a8359770e # v2
+        uses: davelosert/vitest-coverage-report-action@v2
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
@@ -8,9 +8,9 @@ jobs:
  test:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/checkout@v4
      - name: Setup Node.js
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        uses: actions/setup-node@v4
        with:
          node-version: 20.x
      - name: Install and test
@@ -1,4 +1,4 @@
-FROM --platform=${BUILDPLATFORM} node:24@sha256:8530f76a96d88820d288761f022e318970dda93d01536919fbc16076b7983e63 AS build
+FROM --platform=${BUILDPLATFORM} node:18 AS build

 WORKDIR /opt/node_app

@@ -7,13 +7,13 @@ COPY . .
 # do not ignore optional dependencies:
 # Error: Cannot find module @rollup/rollup-linux-x64-gnu
 RUN --mount=type=cache,target=/root/.cache/yarn \
-    npm_config_target_arch=${TARGETARCH} yarn --frozen-lockfile --network-timeout 600000
+    npm_config_target_arch=${TARGETARCH} yarn --network-timeout 600000

 ARG NODE_ENV=production

 RUN npm_config_target_arch=${TARGETARCH} yarn build:app:docker

-FROM nginx:stable-alpine-slim@sha256:2c605dbeab79a6b2a63340474fe58119d0ef95bdc4b1f41df0aa689659b3d13b
+FROM --platform=${TARGETPLATFORM} nginx:1.27-alpine

 COPY --from=build /opt/node_app/excalidraw-app/build /usr/share/nginx/html

@@ -29,7 +29,7 @@
  <a href="https://docs.excalidraw.com/docs/introduction/contributing">
    <img alt="PRs welcome!" src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat"  /></a>
  <a href="https://discord.gg/UexuTaE">
-    <img alt="Chat on Discord" src="https://img.shields.io/discord/723672430744174682?color=738ad6&label=Chat%20on%20Discord&logo=discord&logoColor=ffffff&widget=false"/></a>
+    <img alt="Chat on Discord" src="https://img.shields.io/discord/723672430744174682?color=738ad6&label=Chat%20on%20Discord&logo=discord&logoColor=ffffff&widge=false"/></a>
  <a href="https://deepwiki.com/excalidraw/excalidraw">
    <img alt="Ask DeepWiki" src="https://deepwiki.com/badge.svg" /></a>
  <a href="https://twitter.com/excalidraw">
@@ -97,8 +97,8 @@ const config = {
                href: "https://discord.gg/UexuTaE",
              },
              {
-                label: "𝕏",
-                href: "https://x.com/excalidraw",
+                label: "Twitter",
+                href: "https://twitter.com/excalidraw",
              },
              {
                label: "Linkedin",
@@ -22,6 +22,7 @@ import Trans from "@excalidraw/excalidraw/components/Trans";
 import {
  APP_NAME,
  EVENT,
+  THEME,
  VERSION_TIMEOUT,
  debounce,
  getVersion,
@@ -951,7 +952,6 @@ const ExcalidrawWrapper = () => {
        handleKeyboardGlobally={true}
        autoFocus={true}
        theme={editorTheme}
-        onThemeChange={setAppTheme}
        renderTopRightUI={(isMobile) => {
          if (isMobile || !collabAPI || isCollabDisabled) {
            return null;
@@ -988,6 +988,7 @@ const ExcalidrawWrapper = () => {
          isCollaborating={isCollaborating}
          isCollabEnabled={!isCollabDisabled}
          theme={appTheme}
+          setTheme={(theme) => setAppTheme(theme)}
          refresh={() => forceRefresh((prev) => !prev)}
        />
        <AppWelcomeScreen
@@ -1228,6 +1229,14 @@ const ExcalidrawWrapper = () => {
                }
              },
            },
+            {
+              ...CommandPalette.defaultItems.toggleTheme,
+              perform: () => {
+                setAppTheme(
+                  editorTheme === THEME.DARK ? THEME.LIGHT : THEME.DARK,
+                );
+              },
+            },
            {
              label: t("labels.installPWA"),
              category: DEFAULT_CATEGORIES.app,
@@ -20,6 +20,7 @@ export const AppMainMenu: React.FC<{
  isCollaborating: boolean;
  isCollabEnabled: boolean;
  theme: Theme | "system";
+  setTheme: (theme: Theme | "system") => void;
  refresh: () => void;
 }> = React.memo((props) => {
  return (
@@ -77,7 +78,11 @@ export const AppMainMenu: React.FC<{
      )}
      <MainMenu.Separator />
      <MainMenu.DefaultItems.Preferences />
-      <MainMenu.DefaultItems.ToggleTheme allowSystemTheme theme={props.theme} />
+      <MainMenu.DefaultItems.ToggleTheme
+        allowSystemTheme
+        theme={props.theme}
+        onSelect={props.setTheme}
+      />
      <MainMenu.ItemCustom>
        <LanguageList style={{ width: "100%" }} />
      </MainMenu.ItemCustom>
@@ -26,6 +26,7 @@ import {
  get,
 } from "idb-keyval";

+import { appJotaiStore, atom } from "excalidraw-app/app-jotai";
 import { getNonDeletedElements } from "@excalidraw/element";

 import type { LibraryPersistedData } from "@excalidraw/excalidraw/data/library";
@@ -38,7 +39,6 @@ import type {
 } from "@excalidraw/excalidraw/types";
 import type { MaybePromise } from "@excalidraw/common/utility-types";

-import { appJotaiStore, atom } from "../app-jotai";
 import { SAVE_TO_LOCAL_STORAGE_TIMEOUT, STORAGE_KEYS } from "../app_constants";

 import { FileManager } from "./FileManager";
@@ -1,4 +1,5 @@
 import { THEME } from "@excalidraw/excalidraw";
+import { EVENT, CODES, KEYS } from "@excalidraw/common";
 import { useEffect, useLayoutEffect, useState } from "react";

 import type { Theme } from "@excalidraw/element/types";
@@ -30,10 +31,28 @@ export const useHandleAppTheme = () => {
      mediaQuery?.addEventListener("change", handleChange);
    }

+    const handleKeydown = (event: KeyboardEvent) => {
+      if (
+        !event[KEYS.CTRL_OR_CMD] &&
+        event.altKey &&
+        event.shiftKey &&
+        event.code === CODES.D
+      ) {
+        event.preventDefault();
+        event.stopImmediatePropagation();
+        setAppTheme(editorTheme === THEME.DARK ? THEME.LIGHT : THEME.DARK);
+      }
+    };
+
+    document.addEventListener(EVENT.KEYDOWN, handleKeydown, { capture: true });
+
    return () => {
      mediaQuery?.removeEventListener("change", handleChange);
+      document.removeEventListener(EVENT.KEYDOWN, handleKeydown, {
+        capture: true,
+      });
    };
-  }, [appTheme]);
+  }, [appTheme, editorTheme, setAppTheme]);

  useLayoutEffect(() => {
    localStorage.setItem(STORAGE_KEYS.LOCAL_STORAGE_THEME, appTheme);
@@ -75,13 +75,6 @@ export default defineConfig(({ mode }) => {
          find: /^@excalidraw\/utils\/(.*?)/,
          replacement: path.resolve(__dirname, "../packages/utils/src/$1"),
        },
-        {
-          find: /^@excalidraw\/fractional-indexing$/,
-          replacement: path.resolve(
-            __dirname,
-            "../packages/fractional-indexing/src/index.ts",
-          ),
-        },
      ],
    },
    build: {
@@ -56,8 +56,7 @@
    "build:element": "yarn --cwd ./packages/element build:esm",
    "build:excalidraw": "yarn --cwd ./packages/excalidraw build:esm",
    "build:math": "yarn --cwd ./packages/math build:esm",
-    "build:fractional-indexing": "yarn --cwd ./packages/fractional-indexing build:esm",
-    "build:packages": "yarn build:common && yarn build:fractional-indexing && yarn build:math && yarn build:element && yarn build:excalidraw",
+    "build:packages": "yarn build:common && yarn build:math && yarn build:element && yarn build:excalidraw",
    "build:version": "yarn --cwd ./excalidraw-app build:version",
    "build": "yarn --cwd ./excalidraw-app build",
    "build:preview": "yarn --cwd ./excalidraw-app build:preview",
@@ -80,11 +80,7 @@ const cssInvert = (
  return { r: invertedR, g: invertedG, b: invertedB };
 };

-export const applyDarkModeFilter = (color: string, enable = true): string => {
-  if (!enable) {
-    return color;
-  }
-
+export const applyDarkModeFilter = (color: string): string => {
  const cached = DARK_MODE_COLORS_CACHE?.get(color);
  if (cached) {
    return cached;
@@ -337,10 +337,9 @@ export const MAX_DECIMALS_FOR_SVG_EXPORT = 2;
 export const EXPORT_SCALES = [1, 2, 3];
 export const DEFAULT_EXPORT_PADDING = 10; // px

-export const DEFAULT_IMAGE_OPTIONS: AppProps["imageOptions"] = {
-  maxWidthOrHeight: 1440,
-  maxFileSizeBytes: 4 * 1024 * 1024,
-};
+export const DEFAULT_MAX_IMAGE_WIDTH_OR_HEIGHT = 1440;
+
+export const MAX_ALLOWED_FILE_BYTES = 4 * 1024 * 1024;

 export const SVG_NS = "http://www.w3.org/2000/svg";
 export const SVG_DOCUMENT_PREAMBLE = `<?xml version="1.0" standalone="no"?>
@@ -1,109 +0,0 @@
-import { BinaryHeap } from "../src/binary-heap";
-
-describe("BinaryHeap", () => {
-  const numberHeap = () => new BinaryHeap<number>((n) => n);
-
-  const drain = (heap: BinaryHeap<number>) => {
-    const out: number[] = [];
-    while (heap.size() > 0) {
-      out.push(heap.pop()!);
-    }
-    return out;
-  };
-
-  describe("empty heap", () => {
-    it("has size 0", () => {
-      expect(numberHeap().size()).toBe(0);
-    });
-
-    it("pop() returns null", () => {
-      expect(numberHeap().pop()).toBe(null);
-    });
-
-    it("remove() is a no-op and does not throw", () => {
-      const heap = numberHeap();
-      expect(() => heap.remove(1)).not.toThrow();
-      expect(heap.size()).toBe(0);
-    });
-  });
-
-  describe("push / pop", () => {
-    it("tracks size as items are added and removed", () => {
-      const heap = numberHeap();
-      [3, 1, 2].forEach((n) => heap.push(n));
-      expect(heap.size()).toBe(3);
-
-      heap.pop();
-      expect(heap.size()).toBe(2);
-    });
-
-    it("pops a single pushed element back out", () => {
-      const heap = numberHeap();
-      heap.push(42);
-      expect(heap.pop()).toBe(42);
-      expect(heap.pop()).toBe(null);
-    });
-
-    it("always pops the smallest score first", () => {
-      const heap = numberHeap();
-      [5, 3, 8, 1, 9, 2, 7].forEach((n) => heap.push(n));
-      expect(drain(heap)).toEqual([1, 2, 3, 5, 7, 8, 9]);
-    });
-
-    it("handles duplicate scores", () => {
-      const heap = numberHeap();
-      [4, 1, 4, 1, 2].forEach((n) => heap.push(n));
-      expect(drain(heap)).toEqual([1, 1, 2, 4, 4]);
-    });
-
-    it("maintains the heap invariant for a large adversarial (reverse-sorted) input", () => {
-      const heap = numberHeap();
-      // pushing in descending order forces a sift-up on every insert
-      const input = Array.from({ length: 1000 }, (_, i) => 1000 - i);
-      input.forEach((n) => heap.push(n));
-      expect(drain(heap)).toEqual([...input].sort((a, b) => a - b));
-    });
-  });
-
-  describe("remove", () => {
-    it("removes an interior element and keeps the rest ordered", () => {
-      const heap = numberHeap();
-      [5, 3, 8, 1, 9].forEach((n) => heap.push(n));
-
-      heap.remove(8);
-
-      expect(heap.size()).toBe(4);
-      expect(drain(heap)).toEqual([1, 3, 5, 9]);
-    });
-
-    it("can remove the current minimum", () => {
-      const heap = numberHeap();
-      [5, 3, 8, 1, 9].forEach((n) => heap.push(n));
-
-      heap.remove(1);
-
-      expect(heap.size()).toBe(4);
-      expect(heap.pop()).toBe(3);
-    });
-  });
-
-  describe("rescoreElement", () => {
-    type Node = { id: string; f: number };
-
-    it("re-sorts a node after its score is lowered", () => {
-      const heap = new BinaryHeap<Node>((node) => node.f);
-
-      const a = { id: "a", f: 10 };
-      const b = { id: "b", f: 20 };
-      const c = { id: "c", f: 30 };
-      [a, b, c].forEach((node) => heap.push(node));
-
-      c.f = 5;
-      heap.rescoreElement(c);
-
-      expect(heap.pop()).toBe(c);
-      expect(heap.pop()).toBe(a);
-      expect(heap.pop()).toBe(b);
-    });
-  });
-});
@@ -64,7 +64,6 @@
  },
  "dependencies": {
    "@excalidraw/common": "0.18.0",
-    "@excalidraw/math": "0.18.0",
-    "@excalidraw/fractional-indexing": "3.3.0"
+    "@excalidraw/math": "0.18.0"
  }
 }
@@ -338,18 +338,27 @@ export class Scene {
    this.callbacks.clear();
  }

-  /** low-level - generally use app.insertNewElements() */
-  insertElementsAtIndex(
-    elements: ExcalidrawElement[],
-    /** null indicates end of the array */
-    index: number | null,
-  ) {
-    if (!elements.length) {
-      return;
+  insertElementAtIndex(element: ExcalidrawElement, index: number) {
+    if (!Number.isFinite(index) || index < 0) {
+      throw new Error(
+        "insertElementAtIndex can only be called with index >= 0",
+      );
    }

-    if (index === null) {
-      index = this.elements.length;
+    const nextElements = [
+      ...this.elements.slice(0, index),
+      element,
+      ...this.elements.slice(index),
+    ];
+
+    syncMovedIndices(nextElements, arrayToMap([element]));
+
+    this.replaceAllElements(nextElements);
+  }
+
+  insertElementsAtIndex(elements: ExcalidrawElement[], index: number) {
+    if (!elements.length) {
+      return;
    }

    if (!Number.isFinite(index) || index < 0) {
@@ -369,9 +378,24 @@ export class Scene {
    this.replaceAllElements(nextElements);
  }

-  /** low-level - generally use app.insertNewElement() */
  insertElement = (element: ExcalidrawElement) => {
-    this.insertElementsAtIndex([element], null);
+    const index = element.frameId
+      ? this.getElementIndex(element.frameId)
+      : this.elements.length;
+
+    this.insertElementAtIndex(element, index);
+  };
+
+  insertElements = (elements: ExcalidrawElement[]) => {
+    if (!elements.length) {
+      return;
+    }
+
+    const index = elements[0]?.frameId
+      ? this.getElementIndex(elements[0].frameId)
+      : this.elements.length;
+
+    this.insertElementsAtIndex(elements, index);
  };

  getElementIndex(elementId: string) {
@@ -734,11 +734,12 @@ const getBindingStrategyForDraggingBindingElementEndpoints_simple = (
    });

  // Handle outside-outside binding to the same element
-  if (
-    otherBinding &&
-    otherBinding.elementId === hit?.id &&
-    (!opts?.newArrow || appState.selectedLinearElement?.initialState.origin)
-  ) {
+  if (otherBinding && otherBinding.elementId === hit?.id) {
+    invariant(
+      !opts?.newArrow || appState.selectedLinearElement?.initialState.origin,
+      "appState.selectedLinearElement.initialState.origin must be defined for new arrows",
+    );
+
    return {
      start: {
        mode: "inside",
@@ -1942,9 +1943,9 @@ export const calculateFixedPointForElbowArrowBinding = (
  return {
    fixedPoint: normalizeFixedPoint([
      (nonRotatedSnappedGlobalPoint[0] - hoveredElement.x) /
-        Math.max(hoveredElement.width, PRECISION),
+        hoveredElement.width,
      (nonRotatedSnappedGlobalPoint[1] - hoveredElement.y) /
-        Math.max(hoveredElement.height, PRECISION),
+        hoveredElement.height,
    ]),
  };
 };
@@ -1975,11 +1976,9 @@ export const calculateFixedPointForNonElbowArrowBinding = (

  // Calculate the ratio relative to the element's bounds
  const fixedPointX =
-    (nonRotatedPoint[0] - hoveredElement.x) /
-    Math.max(hoveredElement.width, PRECISION);
+    (nonRotatedPoint[0] - hoveredElement.x) / hoveredElement.width;
  const fixedPointY =
-    (nonRotatedPoint[1] - hoveredElement.y) /
-    Math.max(hoveredElement.height, PRECISION);
+    (nonRotatedPoint[1] - hoveredElement.y) / hoveredElement.height;

  return {
    fixedPoint: normalizeFixedPoint([fixedPointX, fixedPointY]),
@@ -1,4 +1,5 @@
 import rough from "roughjs/bin/rough";
+
 import {
  arrayToMap,
  type Bounds,
@@ -6,6 +7,7 @@ import {
  rescalePoints,
  sizeOf,
 } from "@excalidraw/common";
+
 import {
  degreesToRadians,
  lineSegment,
@@ -14,7 +16,9 @@ import {
  pointFromArray,
  pointRotateRads,
 } from "@excalidraw/math";
+
 import { getCurvePathOps } from "@excalidraw/utils/shape";
+
 import { pointsOnBezierCurves } from "points-on-curve";

 import type {
@@ -25,7 +29,9 @@ import type {
  LocalPoint,
  Radians,
 } from "@excalidraw/math";
+
 import type { AppState } from "@excalidraw/excalidraw/types";
+
 import type { Mutable } from "@excalidraw/common/utility-types";

 import { generateRoughOptions } from "./shape";
@@ -35,20 +41,18 @@ import { getBoundTextElement, getContainerElement } from "./textElement";
 import {
  isArrowElement,
  isBoundToContainer,
-  isFrameLikeElement,
  isFreeDrawElement,
  isLinearElement,
  isLineElement,
  isTextElement,
-  isExcalidrawElement,
 } from "./typeChecks";
+
 import { getElementShape } from "./shape";
+
 import {
  deconstructDiamondElement,
  deconstructRectanguloidElement,
 } from "./utils";
-import { intersectElementWithLineSegment } from "./collision";
-import { elementOverlapsWithFrame, getContainingFrame } from "./frame";

 import type { Drawable, Op } from "roughjs/bin/core";
 import type { Point as RoughPoint } from "roughjs/bin/geometry";
@@ -63,7 +67,6 @@ import type {
  ExcalidrawRectanguloidElement,
  ExcalidrawTextElementWithContainer,
  NonDeleted,
-  NonDeletedExcalidrawElement,
 } from "./types";

 export type RectangleBox = {
@@ -677,9 +680,8 @@ export const getMinMaxXYFromCurvePathOps = (
  return [minX, minY, maxX, maxY];
 };

-export const getBoundsFromPoints = <P extends GlobalPoint | LocalPoint>(
-  points: readonly P[],
-  padding: number = 0,
+export const getBoundsFromPoints = (
+  points: ExcalidrawFreeDrawElement["points"],
 ): Bounds => {
  let minX = Infinity;
  let minY = Infinity;
@@ -693,7 +695,7 @@ export const getBoundsFromPoints = <P extends GlobalPoint | LocalPoint>(
    maxY = Math.max(maxY, y);
  }

-  return [minX - padding, minY - padding, maxX + padding, maxY + padding];
+  return [minX, minY, maxX, maxY];
 };

 const getFreeDrawElementAbsoluteCoords = (
@@ -1259,17 +1261,6 @@ export const pointInsideBounds = <P extends GlobalPoint | LocalPoint>(
 ): boolean =>
  p[0] > bounds[0] && p[0] < bounds[2] && p[1] > bounds[1] && p[1] < bounds[3];

-// TODO make pointInsideBounds inclusive and remove this function once we
-// test nothing is breaking
-export const pointInsideBoundsInclusive = <P extends GlobalPoint | LocalPoint>(
-  p: P,
-  bounds: Bounds,
-): boolean =>
-  p[0] >= bounds[0] &&
-  p[0] <= bounds[2] &&
-  p[1] >= bounds[1] &&
-  p[1] <= bounds[3];
-
 export const doBoundsIntersect = (
  bounds1: Bounds | null,
  bounds2: Bounds | null,
@@ -1284,310 +1275,13 @@ export const doBoundsIntersect = (
  return minX1 < maxX2 && maxX1 > minX2 && minY1 < maxY2 && maxY1 > minY2;
 };

-export const boundsContainBounds = (outerBounds: Bounds, innerBounds: Bounds) =>
-  [
-    pointFrom<GlobalPoint>(innerBounds[0], innerBounds[1]),
-    pointFrom<GlobalPoint>(innerBounds[0], innerBounds[3]),
-    pointFrom<GlobalPoint>(innerBounds[2], innerBounds[1]),
-    pointFrom<GlobalPoint>(innerBounds[2], innerBounds[3]),
-  ].every((point) => pointInsideBoundsInclusive(point, outerBounds));
-
-/**
- * High level helper to get elements overlapping a bounding box.
- * It can be used to get elements overlapping a selection box, for example.
- *
- */
-export const elementsOverlappingBBox = ({
-  elements,
-  elementsMap,
-  bounds,
-  type,
-  excludeElementsInFrames,
-  shouldIgnoreElementFromSelection,
-}: {
-  elements: readonly NonDeletedExcalidrawElement[];
-  elementsMap?: ElementsMap;
-  bounds: Bounds | ExcalidrawElement;
-  /**
-   * - overlap: elements overlapping or inside bounds
-   * - contain: elements inside bounds
-   **/
-  type: "contain" | "overlap";
-  excludeElementsInFrames?: boolean;
-  shouldIgnoreElementFromSelection?: (
-    element: NonDeletedExcalidrawElement,
-  ) => boolean;
-}) => {
-  if (!elementsMap) {
-    elementsMap = arrayToMap(elements) as ElementsMap;
-  }
-  const selectionBounds = isExcalidrawElement(bounds)
-    ? getElementBounds(bounds, elementsMap)
-    : bounds;
-  const [selectionX1, selectionY1, selectionX2, selectionY2] = selectionBounds;
-  const selectionEdges = [
-    lineSegment<GlobalPoint>(
-      pointFrom(selectionX1, selectionY1),
-      pointFrom(selectionX2, selectionY1),
-    ),
-    lineSegment<GlobalPoint>(
-      pointFrom(selectionX2, selectionY1),
-      pointFrom(selectionX2, selectionY2),
-    ),
-    lineSegment<GlobalPoint>(
-      pointFrom(selectionX2, selectionY2),
-      pointFrom(selectionX1, selectionY2),
-    ),
-    lineSegment<GlobalPoint>(
-      pointFrom(selectionX1, selectionY2),
-      pointFrom(selectionX1, selectionY1),
-    ),
-  ];
-
-  const framesInSelection = excludeElementsInFrames
-    ? new Set<NonDeletedExcalidrawElement["id"]>()
-    : null;
-  const groups: Record<string, NonDeletedExcalidrawElement[]> = {};
-  const elementsInSelection: Set<NonDeletedExcalidrawElement> = new Set();
-
-  for (const element of elements) {
-    if (shouldIgnoreElementFromSelection?.(element)) {
-      continue;
-    }
-
-    // Track only selectable top-level group members, so ignored elements such
-    // as bound text and locked elements don't affect group selection.
-    const groupId = element.groupIds.at(-1);
-    if (groupId) {
-      if (!groups[groupId]) {
-        groups[groupId] = [];
-      }
-      groups[groupId].push(element);
-    }
-
-    const strokeWidth = element.strokeWidth;
-    let labelAABB: Bounds | null = null;
-    let elementAABB = getElementBounds(element, elementsMap);
-
-    elementAABB = [
-      elementAABB[0] - strokeWidth / 2,
-      elementAABB[1] - strokeWidth / 2,
-      elementAABB[2] + strokeWidth / 2,
-      elementAABB[3] + strokeWidth / 2,
-    ] as Bounds;
-
-    // Whether the element bounds should include the bound text element bounds
-    const boundTextElement =
-      isArrowElement(element) && getBoundTextElement(element, elementsMap);
-    if (boundTextElement) {
-      const { x, y } = LinearElementEditor.getBoundTextElementPosition(
-        element,
-        boundTextElement,
-        elementsMap,
-      );
-      labelAABB = [
-        x,
-        y,
-        x + boundTextElement.width,
-        y + boundTextElement.height,
-      ] as Bounds;
-    }
-
-    // Clip element bounds by its containing frame (if any), since only the
-    // visible (frame-clipped) portion of the element is relevant for selection.
-    const associatedFrame = getContainingFrame(element, elementsMap);
-    if (
-      associatedFrame &&
-      elementOverlapsWithFrame(element, associatedFrame, elementsMap)
-    ) {
-      const frameAABB = getElementBounds(associatedFrame, elementsMap);
-      elementAABB = [
-        Math.max(elementAABB[0], frameAABB[0]),
-        Math.max(elementAABB[1], frameAABB[1]),
-        Math.min(elementAABB[2], frameAABB[2]),
-        Math.min(elementAABB[3], frameAABB[3]),
-      ] as Bounds;
-
-      labelAABB = labelAABB
-        ? ([
-            Math.max(labelAABB[0], frameAABB[0]),
-            Math.max(labelAABB[1], frameAABB[1]),
-            Math.min(labelAABB[2], frameAABB[2]),
-            Math.min(labelAABB[3], frameAABB[3]),
-          ] as Bounds)
-        : null;
-    }
-
-    const commonAABB = labelAABB
-      ? ([
-          Math.min(labelAABB[0], elementAABB[0]),
-          Math.min(labelAABB[1], elementAABB[1]),
-          Math.max(labelAABB[2], elementAABB[2]),
-          Math.max(labelAABB[3], elementAABB[3]),
-        ] as Bounds)
-      : elementAABB;
-
-    // ============== Evaluation ==============
-
-    // 1. If the selection box WRAPs the element's AABB, then add it to the
-    //    selection and move on, regardless of the selection mode.
-    //
-    //    PERF: This trick only works with axis-aligned box selection and the
-    //          current convex element shapes!
-    if (boundsContainBounds(selectionBounds, commonAABB)) {
-      if (framesInSelection && isFrameLikeElement(element)) {
-        framesInSelection.add(element.id);
-      }
-      elementsInSelection.add(element);
-      continue;
-    }
-
-    // 2. Handle the case where the label is overlapped by the selection box
-    if (
-      type === "overlap" &&
-      labelAABB &&
-      doBoundsIntersect(selectionBounds, labelAABB)
-    ) {
-      elementsInSelection.add(element);
-      continue;
-    }
-
-    // 3. Handle the case where the selection is not wrapping the element, but
-    //    it does intersect the element's outline (non-AABB).
-    if (type === "overlap" && doBoundsIntersect(selectionBounds, elementAABB)) {
-      let hasIntersection = false;
-
-      // Preliminary check potential intersection imprecision
-      if (isLinearElement(element) || isFreeDrawElement(element)) {
-        const center = elementCenterPoint(element, elementsMap);
-        hasIntersection = element.points.some((point) => {
-          const rotatedPoint = pointRotateRads(
-            pointFrom<GlobalPoint>(element.x + point[0], element.y + point[1]),
-            center,
-            element.angle,
-          );
-
-          return pointInsideBounds(rotatedPoint, selectionBounds);
-        });
-      } else {
-        const nonRotatedElementBounds = getElementBounds(
-          element,
-          elementsMap,
-          true,
-        );
-        const center = elementCenterPoint(element, elementsMap);
-        hasIntersection = [
-          pointRotateRads(
-            pointFrom<GlobalPoint>(
-              (nonRotatedElementBounds[0] + nonRotatedElementBounds[2]) / 2,
-              nonRotatedElementBounds[1],
-            ),
-            center,
-            element.angle,
-          ),
-          pointRotateRads(
-            pointFrom<GlobalPoint>(
-              nonRotatedElementBounds[2],
-              (nonRotatedElementBounds[1] + nonRotatedElementBounds[3]) / 2,
-            ),
-            center,
-            element.angle,
-          ),
-          pointRotateRads(
-            pointFrom<GlobalPoint>(
-              (nonRotatedElementBounds[0] + nonRotatedElementBounds[2]) / 2,
-              nonRotatedElementBounds[3],
-            ),
-            center,
-            element.angle,
-          ),
-          pointRotateRads(
-            pointFrom<GlobalPoint>(
-              nonRotatedElementBounds[0],
-              (nonRotatedElementBounds[1] + nonRotatedElementBounds[3]) / 2,
-            ),
-            center,
-            element.angle,
-          ),
-        ].some((point) => {
-          return pointInsideBounds(
-            pointRotateRads(point, center, element.angle),
-            selectionBounds,
-          );
-        });
-      }
-
-      if (!hasIntersection) {
-        hasIntersection = selectionEdges.some(
-          (selectionEdge) =>
-            intersectElementWithLineSegment(
-              element,
-              elementsMap,
-              selectionEdge,
-              strokeWidth / 2,
-              true, // Stop at first hit for better performance
-            ).length > 0,
-        );
-      }
-
-      if (hasIntersection) {
-        if (framesInSelection && isFrameLikeElement(element)) {
-          framesInSelection.add(element.id);
-        }
-
-        elementsInSelection.add(element);
-        continue;
-      }
-    }
-
-    // 4. We don't need to handle when the selection is inside the element
-    //    as it is separately handled in App.
-  }
-
-  if (framesInSelection) {
-    elementsInSelection.forEach((element) => {
-      if (element.frameId && framesInSelection.has(element.frameId)) {
-        elementsInSelection.delete(element);
-      }
-    });
-  }
-
-  if (type === "overlap") {
-    Array.from(elementsInSelection).forEach((element) => {
-      const groupId = element.groupIds.at(-1);
-      const group = groupId ? groups[groupId] : null;
-
-      group?.forEach((groupElement) => elementsInSelection.add(groupElement));
-    });
-  } else if (type === "contain") {
-    elementsInSelection.forEach((element) => {
-      // note: currently we only support top-level group handling since
-      // we don't support box selecting while editing the group/subgroup
-      // see https://github.com/excalidraw/excalidraw/pull/11234#issuecomment-4387654451
-      const groupId = element.groupIds.at(-1);
-
-      const group = groupId ? groups[groupId] : null;
-
-      if (
-        group &&
-        !group.every((groupElement) => elementsInSelection.has(groupElement))
-      ) {
-        elementsInSelection.delete(element);
-      }
-    });
-  }
-
-  // to maintain original order elements (namely for group selection)
-  return elements.filter((element) => elementsInSelection.has(element));
-};
-
 export const elementCenterPoint = (
  element: ExcalidrawElement,
  elementsMap: ElementsMap,
  xOffset: number = 0,
  yOffset: number = 0,
 ) => {
-  if (isLinearElement(element) || isFreeDrawElement(element)) {
+  if (isLinearElement(element)) {
    const [x1, y1, x2, y2] = getElementAbsoluteCoords(element, elementsMap);
    const [x, y] = pointFrom<GlobalPoint>((x1 + x2) / 2, (y1 + y2) / 2);

@@ -61,8 +61,6 @@ import { distanceToElement } from "./distance";

 import { getBindingGap } from "./binding";

-import { hasBackground } from "./comparisons";
-
 import type {
  ElementsMap,
  ExcalidrawArrowElement,
@@ -85,7 +83,7 @@ export const shouldTestInside = (element: ExcalidrawElement) => {
  }

  const isDraggableFromInside =
-    (hasBackground(element.type) && !isTransparent(element.backgroundColor)) ||
+    !isTransparent(element.backgroundColor) ||
    hasBoundTextElement(element) ||
    isIframeLikeElement(element) ||
    isTextElement(element);
@@ -156,11 +154,14 @@ export const hitElementItself = ({

  // Hit test against the extended, rotated bounding box of the element first
  const bounds = getElementBounds(element, elementsMap, true);
-  const hitBounds = isPointInRotatedBounds(
-    point,
-    bounds,
-    element.angle,
-    threshold,
+  const hitBounds = isPointWithinBounds(
+    pointFrom(bounds[0] - threshold, bounds[1] - threshold),
+    pointRotateRads(
+      point,
+      getCenterForBounds(bounds),
+      -element.angle as Radians,
+    ),
+    pointFrom(bounds[2] + threshold, bounds[3] + threshold),
  );

  // PERF: Bail out early if the point is not even in the
@@ -191,32 +192,18 @@ export const hitElementItself = ({
  return result;
 };

-const isPointInRotatedBounds = (
-  point: GlobalPoint,
-  bounds: Bounds,
-  angle: Radians,
-  tolerance = 0,
-) => {
-  const adjustedPoint =
-    angle === 0
-      ? point
-      : pointRotateRads(point, getCenterForBounds(bounds), -angle as Radians);
-
-  return isPointWithinBounds(
-    pointFrom(bounds[0] - tolerance, bounds[1] - tolerance),
-    adjustedPoint,
-    pointFrom(bounds[2] + tolerance, bounds[3] + tolerance),
-  );
-};
-
 export const hitElementBoundingBox = (
  point: GlobalPoint,
  element: ExcalidrawElement,
  elementsMap: ElementsMap,
  tolerance = 0,
 ) => {
-  const bounds = getElementBounds(element, elementsMap, true);
-  return isPointInRotatedBounds(point, bounds, element.angle, tolerance);
+  let [x1, y1, x2, y2] = getElementBounds(element, elementsMap);
+  x1 -= tolerance;
+  y1 -= tolerance;
+  x2 += tolerance;
+  y2 += tolerance;
+  return isPointWithinBounds(pointFrom(x1, y1), point, pointFrom(x2, y2));
 };

 export const hitElementBoundingBoxOnly = (
@@ -326,10 +313,7 @@ export const getAllHoveredElementAtPoint = (
    ) {
      candidateElements.push(element);

-      if (
-        hasBackground(element.type) &&
-        !isTransparent(element.backgroundColor)
-      ) {
+      if (!isTransparent(element.backgroundColor)) {
        break;
      }
    }
@@ -589,9 +573,7 @@ const intersectLinearOrFreeDrawWithLineSegment = (
      continue;
    }

-    const hits = curveIntersectLineSegment(c, segment, {
-      iterLimit: 10,
-    });
+    const hits = curveIntersectLineSegment(c, segment);

    if (hits.length > 0) {
      intersections.push(...hits);
@@ -111,9 +111,6 @@ export const duplicateElements = (
         * user interaction.
         */
        type: "everything";
-        // TODO remove/review this once we add frame children order migration
-        // and invariant checks
-        preserveFrameChildrenOrder?: boolean;
      }
    | {
        /**
@@ -173,8 +170,6 @@ export const duplicateElements = (
    opts.type === "in-place"
      ? opts.idsOfElementsToDuplicate
      : new Map(elements.map((el) => [el.id, el]));
-  const preserveFrameChildrenOrder =
-    opts.type === "everything" && opts.preserveFrameChildrenOrder;

  // For sanity
  if (opts.type === "in-place") {
@@ -255,9 +250,6 @@ export const duplicateElements = (
    elementsWithDuplicates.splice(index + 1, 0, ...castArray(elements));
  };

-  // main
-  // ---------------------------------------------------------------------------
-
  const frameIdsToDuplicate = new Set(
    elements
      .filter(
@@ -282,7 +274,7 @@ export const duplicateElements = (
    if (groupId) {
      const groupElements = getElementsInGroup(elements, groupId).flatMap(
        (element) =>
-          isFrameLikeElement(element) && !preserveFrameChildrenOrder
+          isFrameLikeElement(element)
            ? [...getFrameChildren(elements, element.id), element]
            : [element],
      );
@@ -298,25 +290,13 @@ export const duplicateElements = (
    // frame duplication
    // -------------------------------------------------------------------------

-    if (
-      !preserveFrameChildrenOrder &&
-      element.frameId &&
-      frameIdsToDuplicate.has(element.frameId)
-    ) {
+    if (element.frameId && frameIdsToDuplicate.has(element.frameId)) {
      continue;
    }

    if (isFrameLikeElement(element)) {
      const frameId = element.id;

-      if (preserveFrameChildrenOrder) {
-        insertBeforeOrAfterIndex(
-          findLastIndex(elementsWithDuplicates, (el) => el.id === frameId),
-          copyElements(element),
-        );
-        continue;
-      }
-
      const frameChildren = getFrameChildren(elements, frameId);

      const targetIndex = findLastIndex(elementsWithDuplicates, (el) => {
@@ -2124,8 +2124,8 @@ const normalizeArrowElementUpdate = (
    offsetY < -MAX_POS ||
    offsetY > MAX_POS ||
    offsetX + points[points.length - 1][0] < -MAX_POS ||
-    offsetX + points[points.length - 1][0] > MAX_POS ||
-    offsetY + points[points.length - 1][1] < -MAX_POS ||
+    offsetY + points[points.length - 1][0] > MAX_POS ||
+    offsetX + points[points.length - 1][1] < -MAX_POS ||
    offsetY + points[points.length - 1][1] > MAX_POS
  ) {
    console.error(
@@ -1,9 +1,6 @@
-import { arrayToMap } from "@excalidraw/common";
+import { generateNKeysBetween } from "fractional-indexing";

-import {
-  validateOrderKey,
-  generateNKeysBetween,
-} from "@excalidraw/fractional-indexing";
+import { arrayToMap } from "@excalidraw/common";

 import { mutateElement, newElementWith } from "./mutateElement";
 import { getBoundTextElement } from "./textElement";
@@ -385,13 +382,6 @@ const isValidFractionalIndex = (
    return false;
  }

-  try {
-    // Format validation
-    validateOrderKey(index);
-  } catch {
-    return false;
-  }
-
  if (predecessor && successor) {
    return predecessor < index && index < successor;
  }
@@ -1,9 +1,7 @@
 import { arrayToMap } from "@excalidraw/common";
-import {
-  isPointWithinBounds,
-  pointFrom,
-  segmentsIntersectAt,
-} from "@excalidraw/math";
+import { isPointWithinBounds, pointFrom } from "@excalidraw/math";
+import { doLineSegmentsIntersect } from "@excalidraw/utils/bbox";
+import { elementsOverlappingBBox } from "@excalidraw/utils/withinBounds";

 import type {
  AppClassProperties,
@@ -20,13 +18,9 @@ import {
  getElementLineSegments,
  getCommonBounds,
  getElementAbsoluteCoords,
-  doBoundsIntersect,
-  getElementBounds,
-  boundsContainBounds,
 } from "./bounds";
 import { mutateElement } from "./mutateElement";
 import { getBoundTextElement, getContainerElement } from "./textElement";
-import { syncMovedIndices } from "./fractionalIndex";
 import {
  isFrameElement,
  isFrameLikeElement,
@@ -81,7 +75,7 @@ export function isElementIntersectingFrame(

  const intersecting = frameLineSegments.some((frameLineSegment) =>
    elementLineSegments.some((elementLineSegment) =>
-      segmentsIntersectAt(frameLineSegment, elementLineSegment),
+      doLineSegmentsIntersect(frameLineSegment, elementLineSegment),
    ),
  );

@@ -106,9 +100,8 @@ export const isElementContainingFrame = (
  frame: ExcalidrawFrameLikeElement,
  elementsMap: ElementsMap,
 ) => {
-  return boundsContainBounds(
-    getElementBounds(element, elementsMap),
-    getElementBounds(frame, elementsMap),
+  return getElementsWithinSelection([frame], element, elementsMap).some(
+    (e) => e.id === frame.id,
  );
 };

@@ -495,44 +488,10 @@ export const filterElementsEligibleAsFrameChildren = (
  return eligibleElements;
 };

-export const getCommonFrameId = (elements: readonly ExcalidrawElement[]) => {
-  let commonFrameId: ExcalidrawElement["frameId"] | undefined;
-
-  for (const element of elements) {
-    if (isFrameLikeElement(element) || !element.frameId) {
-      return null;
-    }
-
-    if (commonFrameId === undefined) {
-      commonFrameId = element.frameId;
-    } else if (commonFrameId !== element.frameId) {
-      return null;
-    }
-  }
-
-  return commonFrameId ?? null;
-};
-
-export const getFrameChildrenInsertionIndex = (
-  elements: readonly ExcalidrawElement[],
-  frameId: ExcalidrawFrameLikeElement["id"],
-): number | null => {
-  for (let index = elements.length - 1; index >= 0; index--) {
-    const element = elements[index];
-
-    if (element.id === frameId) {
-      return index;
-    } else if (element.frameId === frameId) {
-      return index + 1;
-    }
-  }
-
-  return null;
-};
-
 /**
- * Adds elements and their bound elements to frame. Reorders added elements to
- * be just below frame, or just above its highest child (whichever is higher).
+ * Retains (or repairs for target frame) the ordering invriant where children
+ * elements come right before the parent frame:
+ * [el, el, child, child, frame, el]
 *
 * @returns mutated allElements (same data structure)
 */
@@ -540,11 +499,19 @@ export const addElementsToFrame = <T extends ElementsMapOrArray>(
  allElements: T,
  elementsToAdd: NonDeletedExcalidrawElement[],
  frame: ExcalidrawFrameLikeElement,
+  appState: AppState,
 ): T => {
  const elementsMap = arrayToMap(allElements);
-  const commonFrameId = getCommonFrameId(elementsToAdd);
+  const currTargetFrameChildrenMap = new Map<ExcalidrawElement["id"], true>();
+  for (const element of allElements.values()) {
+    if (element.frameId === frame.id) {
+      currTargetFrameChildrenMap.set(element.id, true);
+    }
+  }

-  const finalElementsToAdd = new Set<ExcalidrawElement>();
+  const suppliedElementsToAddSet = new Set(elementsToAdd.map((el) => el.id));
+
+  const finalElementsToAdd: ExcalidrawElement[] = [];

  const otherFrames = new Set<ExcalidrawFrameLikeElement["id"]>();

@@ -555,8 +522,7 @@ export const addElementsToFrame = <T extends ElementsMapOrArray>(
  }

  // - add bound text elements if not already in the array
-  // - keep elements already in the frame so mixed selections can be reordered
-  //   together
+  // - filter out elements that are already in the frame
  for (const element of omitGroupsContainingFrameLikes(
    allElements,
    elementsToAdd,
@@ -569,64 +535,38 @@ export const addElementsToFrame = <T extends ElementsMapOrArray>(
      continue;
    }

-    finalElementsToAdd.add(element);
+    // if the element is already in another frame (which is also in elementsToAdd),
+    // it means that frame and children are selected at the same time
+    // => keep original frame membership, do not add to the target frame
+    if (
+      element.frameId &&
+      appState.selectedElementIds[element.id] &&
+      appState.selectedElementIds[element.frameId]
+    ) {
+      continue;
+    }
+
+    if (!currTargetFrameChildrenMap.has(element.id)) {
+      finalElementsToAdd.push(element);
+    }

    const boundTextElement = getBoundTextElement(element, elementsMap);
-    if (boundTextElement && !finalElementsToAdd.has(boundTextElement)) {
-      finalElementsToAdd.add(boundTextElement);
+    if (
+      boundTextElement &&
+      !suppliedElementsToAddSet.has(boundTextElement.id) &&
+      !currTargetFrameChildrenMap.has(boundTextElement.id)
+    ) {
+      finalElementsToAdd.push(boundTextElement);
    }
  }

  for (const element of finalElementsToAdd) {
-    // we don't always need to update the element if it's already in the frame,
-    // but we still need to accumulate in finalElementsToAdd so we potentially
-    // reorder them if added together
-    if (element.frameId !== frame.id) {
-      mutateElement(element, elementsMap, {
-        frameId: frame.id,
-      });
-    }
+    mutateElement(element, elementsMap, {
+      frameId: frame.id,
+    });
  }

-  // (re)order elements to be just below the frame,
-  // or just above the highest child if that is higher
-  // (latter case is denormalized order until we migrate)
-  // ---------------------------------------------------------------------------
-
-  if (
-    !finalElementsToAdd.size ||
-    // if all elements to add already belong to the frame, then we don't want to
-    // reorder (case: we're dragging element children within the frame)
-    commonFrameId === frame.id
-  ) {
-    return allElements;
-  }
-
-  const otherElements = Array.from(allElements.values()).filter(
-    (element) => !finalElementsToAdd.has(element),
-  );
-  const insertionIndex = getFrameChildrenInsertionIndex(
-    otherElements,
-    frame.id,
-  );
-
-  if (insertionIndex === null) {
-    return allElements;
-  }
-
-  const reorderedElements = [
-    ...otherElements.slice(0, insertionIndex),
-    ...finalElementsToAdd,
-    ...otherElements.slice(insertionIndex),
-  ];
-
-  syncMovedIndices(reorderedElements, arrayToMap([...finalElementsToAdd]));
-
-  return (
-    Array.isArray(allElements)
-      ? reorderedElements
-      : new Map(reorderedElements.map((element) => [element.id, element]))
-  ) as T;
+  return allElements;
 };

 export const removeElementsFromFrame = (
@@ -680,11 +620,13 @@ export const replaceAllElementsInFrame = <T extends ExcalidrawElement>(
  allElements: readonly T[],
  nextElementsInFrame: ExcalidrawElement[],
  frame: ExcalidrawFrameLikeElement,
+  app: AppClassProperties,
 ): T[] => {
  return addElementsToFrame(
    removeAllElementsFromFrame(allElements, frame),
    nextElementsInFrame,
    frame,
+    app.state,
  ).slice();
 };

@@ -978,17 +920,16 @@ export const getFrameLikeTitle = (element: ExcalidrawFrameLikeElement) => {
 export const getElementsOverlappingFrame = (
  elements: readonly ExcalidrawElement[],
  frame: ExcalidrawFrameLikeElement,
-  elementsMap: ElementsMap,
 ) => {
-  return elements.filter(
-    (el) =>
-      // exclude elements which are overlapping, but are in a different frame,
+  return (
+    elementsOverlappingBBox({
+      elements,
+      bounds: frame,
+      type: "overlap",
+    })
+      // removes elements who are overlapping, but are in a different frame,
      // and thus invisible in target frame
-      (!el.frameId || el.frameId === frame.id) &&
-      doBoundsIntersect(
-        getElementBounds(el, elementsMap),
-        getElementBounds(frame, elementsMap),
-      ),
+      .filter((el) => !el.frameId || el.frameId === frame.id)
  );
 };

@@ -486,7 +486,7 @@ export class LinearElementEditor {
          selectedPointsIndices,
        )}) points(0..${
          element.points.length - 1
-        }) lastClickedPoint(${lastClickedPoint}) isElbowArrow: ${elbowed}`,
+        }) lastClickedPoint(${lastClickedPoint})`,
      );

      // Fall back to the actual last point as a last resort.
@@ -2139,13 +2139,13 @@ const pointDraggingUpdates = (
 } => {
  const naiveDraggingPoints = new Map(
    selectedPointsIndices.map((pointIndex) => {
-      // NOTE: Avoid stale point index issue potentially caused by elbow
-      // arrows unpredictably changing the number of points during dragging
-      const point = element.points[pointIndex] ?? element.points.at(-1);
      return [
        pointIndex,
        {
-          point: pointFrom<LocalPoint>(point[0] + deltaX, point[1] + deltaY),
+          point: pointFrom<LocalPoint>(
+            element.points[pointIndex][0] + deltaX,
+            element.points[pointIndex][1] + deltaY,
+          ),
          isDragging: true,
        },
      ];
@@ -422,10 +422,10 @@ const drawElementOnCanvas = (

      for (const shape of shapes) {
        if (typeof shape === "string") {
-          context.fillStyle = applyDarkModeFilter(
-            element.strokeColor,
-            renderConfig.theme === THEME.DARK,
-          );
+          context.fillStyle =
+            renderConfig.theme === THEME.DARK
+              ? applyDarkModeFilter(element.strokeColor)
+              : element.strokeColor;
          context.fill(new Path2D(shape));
        } else {
          rc.draw(shape);
@@ -555,10 +555,10 @@ const drawElementOnCanvas = (
        context.canvas.setAttribute("dir", rtl ? "rtl" : "ltr");
        context.save();
        context.font = getFontString(element);
-        context.fillStyle = applyDarkModeFilter(
-          element.strokeColor,
-          renderConfig.theme === THEME.DARK,
-        );
+        context.fillStyle =
+          renderConfig.theme === THEME.DARK
+            ? applyDarkModeFilter(element.strokeColor)
+            : element.strokeColor;
        context.textAlign = element.textAlign as CanvasTextAlign;

        // Canvas does not support multiline text by default
@@ -811,10 +811,10 @@ export const renderElement = (
        context.fillStyle = "rgba(0, 0, 200, 0.04)";

        context.lineWidth = FRAME_STYLE.strokeWidth / appState.zoom.value;
-        context.strokeStyle = applyDarkModeFilter(
-          FRAME_STYLE.strokeColor,
-          appState.theme === THEME.DARK,
-        );
+        context.strokeStyle =
+          appState.theme === THEME.DARK
+            ? applyDarkModeFilter(FRAME_STYLE.strokeColor)
+            : FRAME_STYLE.strokeColor;

        // TODO change later to only affect AI frames
        if (isMagicFrameElement(element)) {
@@ -1,12 +1,11 @@
-import { arrayToMap, isShallowEqual, type Bounds } from "@excalidraw/common";
+import { arrayToMap, isShallowEqual } from "@excalidraw/common";

 import type {
  AppState,
-  BoxSelectionMode,
  InteractiveCanvasAppState,
 } from "@excalidraw/excalidraw/types";

-import { elementsOverlappingBBox, getElementAbsoluteCoords } from "./bounds";
+import { getElementAbsoluteCoords, getElementBounds } from "./bounds";
 import { isElementInViewport } from "./sizeHelpers";
 import {
  isBoundToContainer,
@@ -14,7 +13,11 @@ import {
  isLinearElement,
  isTextElement,
 } from "./typeChecks";
-import { getFrameChildren } from "./frame";
+import {
+  elementOverlapsWithFrame,
+  getContainingFrame,
+  getFrameChildren,
+} from "./frame";

 import { LinearElementEditor } from "./linearElementEditor";
 import { selectGroupsForSelectedElements } from "./groups";
@@ -23,27 +26,10 @@ import type {
  ElementsMap,
  ElementsMapOrArray,
  ExcalidrawElement,
-  ExcalidrawFrameLikeElement,
  NonDeleted,
  NonDeletedExcalidrawElement,
 } from "./types";

-const shouldIgnoreElementFromSelection = (
-  element: NonDeletedExcalidrawElement,
-) => element.locked || isBoundToContainer(element);
-
-const excludeElementsFromFrames = <T extends ExcalidrawElement>(
-  selectedElements: readonly T[],
-  framesInSelection: Set<ExcalidrawFrameLikeElement["id"]>,
-) => {
-  return selectedElements.filter((element) => {
-    if (element.frameId && framesInSelection.has(element.frameId)) {
-      return false;
-    }
-    return true;
-  });
-};
-
 /**
 * Frames and their containing elements are not to be selected at the same time.
 * Given an array of selected elements, if there are frames and their containing elements
@@ -63,38 +49,68 @@ export const excludeElementsInFramesFromSelection = <
    }
  });

-  return excludeElementsFromFrames(selectedElements, framesInSelection);
+  return selectedElements.filter((element) => {
+    if (element.frameId && framesInSelection.has(element.frameId)) {
+      return false;
+    }
+    return true;
+  });
 };

 export const getElementsWithinSelection = (
  elements: readonly NonDeletedExcalidrawElement[],
  selection: NonDeletedExcalidrawElement,
  elementsMap: ElementsMap,
-  // TODO remove (this flag is effectively unused AFAIK)
  excludeElementsInFrames: boolean = true,
-  boxSelectionMode: BoxSelectionMode = "contain",
-): NonDeletedExcalidrawElement[] => {
-  const [selectionStartX, selectionStartY, selectionEndX, selectionEndY] =
+) => {
+  const [selectionX1, selectionY1, selectionX2, selectionY2] =
    getElementAbsoluteCoords(selection, elementsMap);
-  const selectionX1 = Math.min(selectionStartX, selectionEndX);
-  const selectionY1 = Math.min(selectionStartY, selectionEndY);
-  const selectionX2 = Math.max(selectionStartX, selectionEndX);
-  const selectionY2 = Math.max(selectionStartY, selectionEndY);
-  const selectionBounds = [
-    selectionX1,
-    selectionY1,
-    selectionX2,
-    selectionY2,
-  ] as Bounds;

-  return elementsOverlappingBBox({
-    elements,
-    bounds: selectionBounds,
-    elementsMap,
-    type: boxSelectionMode,
-    shouldIgnoreElementFromSelection,
-    excludeElementsInFrames,
+  let elementsInSelection = elements.filter((element) => {
+    let [elementX1, elementY1, elementX2, elementY2] = getElementBounds(
+      element,
+      elementsMap,
+    );
+
+    const containingFrame = getContainingFrame(element, elementsMap);
+    if (containingFrame) {
+      const [fx1, fy1, fx2, fy2] = getElementBounds(
+        containingFrame,
+        elementsMap,
+      );
+
+      elementX1 = Math.max(fx1, elementX1);
+      elementY1 = Math.max(fy1, elementY1);
+      elementX2 = Math.min(fx2, elementX2);
+      elementY2 = Math.min(fy2, elementY2);
+    }
+
+    return (
+      element.locked === false &&
+      element.type !== "selection" &&
+      !isBoundToContainer(element) &&
+      selectionX1 <= elementX1 &&
+      selectionY1 <= elementY1 &&
+      selectionX2 >= elementX2 &&
+      selectionY2 >= elementY2
+    );
  });
+
+  elementsInSelection = excludeElementsInFrames
+    ? excludeElementsInFramesFromSelection(elementsInSelection)
+    : elementsInSelection;
+
+  elementsInSelection = elementsInSelection.filter((element) => {
+    const containingFrame = getContainingFrame(element, elementsMap);
+
+    if (containingFrame) {
+      return elementOverlapsWithFrame(element, containingFrame, elementsMap);
+    }
+
+    return true;
+  });
+
+  return elementsInSelection;
 };

 export const getVisibleAndNonSelectedElements = (
@@ -218,7 +218,9 @@ export const generateRoughOptions = (
    fillWeight: element.strokeWidth / 2,
    hachureGap: element.strokeWidth * 4,
    roughness: adjustRoughness(element),
-    stroke: applyDarkModeFilter(element.strokeColor, isDarkMode),
+    stroke: isDarkMode
+      ? applyDarkModeFilter(element.strokeColor)
+      : element.strokeColor,
    preserveVertices:
      continuousPath || element.roughness < ROUGHNESS.cartoonist,
  };
@@ -232,7 +234,9 @@ export const generateRoughOptions = (
      options.fillStyle = element.fillStyle;
      options.fill = isTransparent(element.backgroundColor)
        ? undefined
-        : applyDarkModeFilter(element.backgroundColor, isDarkMode);
+        : isDarkMode
+        ? applyDarkModeFilter(element.backgroundColor)
+        : element.backgroundColor;
      if (element.type === "ellipse") {
        options.curveFitting = 1;
      }
@@ -245,7 +249,9 @@ export const generateRoughOptions = (
        options.fill =
          element.backgroundColor === "transparent"
            ? undefined
-            : applyDarkModeFilter(element.backgroundColor, isDarkMode);
+            : isDarkMode
+            ? applyDarkModeFilter(element.backgroundColor)
+            : element.backgroundColor;
      }
      return options;
    }
@@ -380,11 +386,12 @@ const getArrowheadShapes = (
    return [];
  }

-  const strokeColor = applyDarkModeFilter(element.strokeColor, isDarkMode);
-  const backgroundFillColor = applyDarkModeFilter(
-    canvasBackgroundColor,
-    isDarkMode,
-  );
+  const strokeColor = isDarkMode
+    ? applyDarkModeFilter(element.strokeColor)
+    : element.strokeColor;
+  const backgroundFillColor = isDarkMode
+    ? applyDarkModeFilter(canvasBackgroundColor)
+    : canvasBackgroundColor;
  const cardinalityOneOrManyOffset = -0.25;
  const cardinalityZeroCircleScale = 0.8;

@@ -1,56 +1,59 @@
-import { arrayToMap } from "@excalidraw/common";
+import { arrayToMapWithIndex } from "@excalidraw/common";

 import type { ExcalidrawElement } from "./types";

-const defragmentGroups = (elements: readonly ExcalidrawElement[]) => {
-  const groupIdAtLevel = (element: ExcalidrawElement, level: number) => {
-    return element.groupIds[element.groupIds.length - level - 1];
-  };
+const normalizeGroupElementOrder = (elements: readonly ExcalidrawElement[]) => {
+  const origElements: ExcalidrawElement[] = elements.slice();
+  const sortedElements = new Set<ExcalidrawElement>();

-  const orderLevel = (
-    levelElements: readonly ExcalidrawElement[],
-    level: number,
+  const orderInnerGroups = (
+    elements: readonly ExcalidrawElement[],
  ): ExcalidrawElement[] => {
-    const buckets = new Map<string, ExcalidrawElement[]>();
-    // Slots preserve first-occurrence order: a groupId reserves its slot
-    // the first time one of its members is seen; loose elements occupy
-    // their own slot. Groups are then expanded (and recursed into) in place.
-    const slots: (ExcalidrawElement | string)[] = [];
-
-    for (const element of levelElements) {
-      const groupId = groupIdAtLevel(element, level);
-      if (groupId === undefined) {
-        slots.push(element);
-        continue;
+    const firstGroupSig = elements[0]?.groupIds?.join("");
+    const aGroup: ExcalidrawElement[] = [elements[0]];
+    const bGroup: ExcalidrawElement[] = [];
+    for (const element of elements.slice(1)) {
+      if (element.groupIds?.join("") === firstGroupSig) {
+        aGroup.push(element);
+      } else {
+        bGroup.push(element);
      }
-      let bucket = buckets.get(groupId);
-      if (!bucket) {
-        bucket = [];
-        buckets.set(groupId, bucket);
-        slots.push(groupId);
-      }
-      bucket.push(element);
    }
-
-    return slots.flatMap((slot) =>
-      typeof slot === "string"
-        ? orderLevel(buckets.get(slot)!, level + 1)
-        : [slot],
-    );
+    return bGroup.length ? [...aGroup, ...orderInnerGroups(bGroup)] : aGroup;
  };

-  // `groupIds` is stored innermost-first, so the outermost group is the
-  // last entry. We recurse from level 0 (outermost) inward.
-  const sortedElements = orderLevel(elements, 0);
+  const groupHandledElements = new Map<string, true>();
+
+  origElements.forEach((element, idx) => {
+    if (groupHandledElements.has(element.id)) {
+      return;
+    }
+    if (element.groupIds?.length) {
+      const topGroup = element.groupIds[element.groupIds.length - 1];
+      const groupElements = origElements.slice(idx).filter((element) => {
+        const ret = element?.groupIds?.some((id) => id === topGroup);
+        if (ret) {
+          groupHandledElements.set(element!.id, true);
+        }
+        return ret;
+      });
+
+      for (const elem of orderInnerGroups(groupElements)) {
+        sortedElements.add(elem);
+      }
+    } else {
+      sortedElements.add(element);
+    }
+  });

  // if there's a bug which resulted in losing some of the elements, return
  // original instead as that's better than losing data
-  if (sortedElements.length !== elements.length) {
-    console.error("defragmentGroups: lost some elements... bailing!");
+  if (sortedElements.size !== elements.length) {
+    console.error("normalizeGroupElementOrder: lost some elements... bailing!");
    return elements;
  }

-  return sortedElements;
+  return [...sortedElements];
 };

 /**
@@ -65,40 +68,39 @@ const defragmentGroups = (elements: readonly ExcalidrawElement[]) => {
 const normalizeBoundElementsOrder = (
  elements: readonly ExcalidrawElement[],
 ) => {
-  const elementsMap = arrayToMap(elements);
+  const elementsMap = arrayToMapWithIndex(elements);

+  const origElements: (ExcalidrawElement | null)[] = elements.slice();
  const sortedElements = new Set<ExcalidrawElement>();

-  for (const element of elements) {
-    if (sortedElements.has(element)) {
-      continue;
+  origElements.forEach((element, idx) => {
+    if (!element) {
+      return;
    }
-
    if (element.boundElements?.length) {
      sortedElements.add(element);
-      for (const boundElement of element.boundElements) {
+      origElements[idx] = null;
+      element.boundElements.forEach((boundElement) => {
        const child = elementsMap.get(boundElement.id);
        if (child && boundElement.type === "text") {
-          sortedElements.add(child);
+          sortedElements.add(child[0]);
+          origElements[child[1]] = null;
        }
+      });
+    } else if (element.type === "text" && element.containerId) {
+      const parent = elementsMap.get(element.containerId);
+      if (!parent?.[0].boundElements?.find((x) => x.id === element.id)) {
+        sortedElements.add(element);
+        origElements[idx] = null;
+
+        // if element has a container and container lists it, skip this element
+        // as it'll be taken care of by the container
      }
-      continue;
+    } else {
+      sortedElements.add(element);
+      origElements[idx] = null;
    }
-
-    // if element has a container and container lists it, skip this element
-    // as it'll be taken care of by the container
-    if (
-      element.type === "text" &&
-      element.containerId &&
-      elementsMap
-        .get(element.containerId)
-        ?.boundElements?.some((el) => el.id === element.id)
-    ) {
-      continue;
-    }
-
-    sortedElements.add(element);
-  }
+  });

  // if there's a bug which resulted in losing some of the elements, return
  // original instead as that's better than losing data
@@ -115,5 +117,5 @@ const normalizeBoundElementsOrder = (
 export const normalizeElementOrder = (
  elements: readonly ExcalidrawElement[],
 ) => {
-  return normalizeBoundElementsOrder(defragmentGroups(elements));
+  return normalizeBoundElementsOrder(normalizeGroupElementOrder(elements));
 };
@@ -392,23 +392,3 @@ export const canBecomePolygon = (
    (points.length === 3 && !pointsEqual(points[0], points[points.length - 1]))
  );
 };
-
-export const isEligibleFrameChildType = (type: ElementOrToolType) => {
-  switch (type) {
-    case "rectangle":
-    case "diamond":
-    case "ellipse":
-    case "arrow":
-    case "line":
-    case "freedraw":
-    case "text":
-    case "image":
-    case "frame":
-    case "embeddable": {
-      return true;
-    }
-    default: {
-      return false;
-    }
-  }
-};
@@ -5,7 +5,6 @@ import {
  pointFrom,
  type GlobalPoint,
  type LocalPoint,
-  type LineSegment,
 } from "@excalidraw/math";
 import { type Bounds, isBounds } from "@excalidraw/common";
 import {
@@ -18,6 +17,7 @@ import {

 import type { ElementsMap, ExcalidrawElement } from "@excalidraw/element/types";
 import type { Curve } from "@excalidraw/math";
+import type { LineSegment } from "@excalidraw/utils";

 // The global data holder to collect the debug operations
 declare global {
@@ -1,7 +1,5 @@
 import { arrayToMap, findIndex, findLastIndex } from "@excalidraw/common";

-import { isFiniteNumber } from "@excalidraw/math";
-
 import type { AppState } from "@excalidraw/excalidraw/types";
 import type { GlobalPoint } from "@excalidraw/math";

@@ -315,46 +313,12 @@ const getTargetElementsMap = <T extends ExcalidrawElement>(
  }, new Map<string, ExcalidrawElement>());
 };

-const hasSameElementIds = (
-  prevElements: readonly ExcalidrawElement[],
-  nextElements: readonly ExcalidrawElement[],
-) => {
-  if (prevElements.length !== nextElements.length) {
-    console.error(
-      "z-index reordering failed: resulting array have different lengths",
-    );
-    return false;
-  }
-
-  const prevElementIdCounts = new Map<ExcalidrawElement["id"], number>();
-  for (const element of prevElements) {
-    prevElementIdCounts.set(
-      element.id,
-      (prevElementIdCounts.get(element.id) || 0) + 1,
-    );
-  }
-
-  for (const element of nextElements) {
-    const count = prevElementIdCounts.get(element.id);
-    if (!count) {
-      console.error(
-        "z-index reordering failed: element id mismatch / duplicate ids",
-      );
-      return false;
-    }
-    prevElementIdCounts.set(element.id, count - 1);
-  }
-
-  return true;
-};
-
 const shiftElementsByOne = (
  elements: readonly ExcalidrawElement[],
  appState: AppState,
  direction: "left" | "right",
  scene: Scene,
 ) => {
-  const originalElements = elements;
  const indicesToMove = getIndicesToMove(elements, appState);
  const targetElementsMap = getTargetElementsMap(elements, indicesToMove);

@@ -425,10 +389,6 @@ const shiftElementsByOne = (
          ];
  });

-  if (!hasSameElementIds(originalElements, elements)) {
-    return originalElements;
-  }
-
  syncMovedIndices(elements, targetElementsMap);

  return elements;
@@ -442,20 +402,11 @@ const shiftElementsToEnd = (
  elementsToBeMoved?: readonly ExcalidrawElement[],
 ) => {
  const indicesToMove = getIndicesToMove(elements, appState, elementsToBeMoved);
-
-  // Nothing to move (e.g. `elementsToBeMoved` is empty because all selected
-  // elements were frame children handled in a prior pass). Bail out early —
-  // otherwise `leadingIndex`/`trailingIndex` below resolve to `undefined` and
-  // the resulting `slice()` calls overlap, duplicating elements.
-  if (indicesToMove.length === 0) {
-    return elements;
-  }
-
  const targetElementsMap = getTargetElementsMap(elements, indicesToMove);
  const displacedElements: ExcalidrawElement[] = [];

-  let leadingIndex: number | undefined;
-  let trailingIndex: number | undefined;
+  let leadingIndex: number;
+  let trailingIndex: number;
  if (direction === "left") {
    if (containingFrame) {
      leadingIndex = findIndex(elements, (el) =>
@@ -500,19 +451,6 @@ const shiftElementsToEnd = (
    leadingIndex = 0;
  }

-  const isValidIndex = (index: number | undefined): index is number => {
-    return isFiniteNumber(index) && index >= 0;
-  };
-
-  if (
-    !isValidIndex(leadingIndex) ||
-    !isValidIndex(trailingIndex) ||
-    leadingIndex > trailingIndex ||
-    indicesToMove.some((index) => index < leadingIndex || index > trailingIndex)
-  ) {
-    return elements;
-  }
-
  for (let index = leadingIndex; index < trailingIndex + 1; index++) {
    if (!indicesToMove.includes(index)) {
      displacedElements.push(elements[index]);
@@ -537,10 +475,6 @@ const shiftElementsToEnd = (
          ...trailingElements,
        ];

-  if (!hasSameElementIds(elements, nextElements)) {
-    return elements;
-  }
-
  syncMovedIndices(nextElements, targetElementsMap);

  return nextElements;
@@ -609,7 +543,7 @@ function shiftElementsAccountingForFrames(

  for (const [frameId, children] of frameChildrenSets) {
    nextElements = shiftFunction(
-      nextElements,
+      allElements,
      appState,
      direction,
      frameId,
@@ -1,14 +1,10 @@
 import { pointFrom } from "@excalidraw/math";
-import { arrayToMap, type Bounds, ROUNDNESS } from "@excalidraw/common";
-import { API } from "@excalidraw/excalidraw/tests/helpers/api";
+
+import { arrayToMap, ROUNDNESS } from "@excalidraw/common";

 import type { LocalPoint } from "@excalidraw/math";

-import {
-  elementsOverlappingBBox,
-  getElementAbsoluteCoords,
-  getElementBounds,
-} from "../src/bounds";
+import { getElementAbsoluteCoords, getElementBounds } from "../src/bounds";

 import type { ExcalidrawElement, ExcalidrawLinearElement } from "../src/types";

@@ -145,65 +141,3 @@ describe("getElementBounds", () => {
    expect(y2).toEqual(319.8162855827246);
  });
 });
-
-const makeElement = (x: number, y: number, width: number, height: number) =>
-  API.createElement({
-    type: "rectangle",
-    x,
-    y,
-    width,
-    height,
-  });
-
-const makeBBox = (
-  minX: number,
-  minY: number,
-  maxX: number,
-  maxY: number,
-): Bounds => [minX, minY, maxX, maxY];
-
-describe("elementsOverlappingBBox()", () => {
-  it("should return elements that overlap bbox", () => {
-    const bbox = makeBBox(0, 0, 100, 100);
-
-    const rectOutside = makeElement(110, 110, 100, 100);
-    const rectInside = makeElement(10, 10, 85, 85);
-    const rectContainingBBox = makeElement(-10, -10, 110, 110);
-    const rectOverlappingTopLeft = makeElement(-10, -10, 50, 50);
-
-    expect(
-      elementsOverlappingBBox({
-        bounds: bbox,
-        type: "overlap",
-        elements: [
-          rectOutside,
-          rectInside,
-          rectContainingBBox,
-          rectOverlappingTopLeft,
-        ],
-      }),
-    ).toEqual([rectInside, rectOverlappingTopLeft]);
-  });
-
-  it("should return elements inside/containing bbox", () => {
-    const bbox = makeBBox(0, 0, 100, 100);
-
-    const rectOutside = makeElement(110, 110, 100, 100);
-    const rectInside = makeElement(10, 10, 85, 85);
-    const rectContainingBBox = makeElement(-10, -10, 110, 110);
-    const rectOverlappingTopLeft = makeElement(-10, -10, 50, 50);
-
-    expect(
-      elementsOverlappingBBox({
-        bounds: bbox,
-        type: "contain",
-        elements: [
-          rectOutside,
-          rectInside,
-          rectContainingBBox,
-          rectOverlappingTopLeft,
-        ],
-      }),
-    ).toEqual([rectInside]);
-  });
-});
@@ -1,4 +1,4 @@
-import { arrayToMap, reseed } from "@excalidraw/common";
+import { arrayToMap } from "@excalidraw/common";
 import { type GlobalPoint, type LocalPoint, pointFrom } from "@excalidraw/math";
 import { Excalidraw } from "@excalidraw/excalidraw";
 import { API } from "@excalidraw/excalidraw/tests/helpers/api";
@@ -12,7 +12,6 @@ import { hitElementItself } from "../src/collision";
 describe("check rotated elements can be hit:", () => {
  beforeEach(async () => {
    localStorage.clear();
-    reseed(7);
    await render(<Excalidraw handleKeyboardGlobally={true} />);
  });

@@ -57,7 +56,6 @@ describe("hitElementItself cache", () => {
    });

    localStorage.clear();
-    reseed(7);
    await render(<Excalidraw handleKeyboardGlobally={true} />);
  });

@@ -1,8 +1,9 @@
 /* eslint-disable no-lone-blocks */
+import { generateKeyBetween } from "fractional-indexing";
+
 import { arrayToMap } from "@excalidraw/common";

 import {
-  InvalidFractionalIndexError,
  syncInvalidIndices,
  syncMovedIndices,
  validateFractionalIndices,
@@ -12,34 +13,13 @@ import { deepCopyElement } from "@excalidraw/element";

 import { API } from "@excalidraw/excalidraw/tests/helpers/api";

-import {
-  generateKeyBetween,
-  validateOrderKey,
-} from "@excalidraw/fractional-indexing";
-
 import type {
  ElementsMap,
  ExcalidrawElement,
  FractionalIndex,
 } from "@excalidraw/element/types";

-describe("fractional index format validation", () => {
-  it("should reject malformed base62 order keys", () => {
-    expect(() => validateOrderKey("a!")).toThrow();
-    expect(() => validateOrderKey("a_")).toThrow();
-    expect(() => validateOrderKey("a1!")).toThrow();
-    expect(() => validateOrderKey("a1_")).toThrow();
-    expect(() => validateOrderKey("zd0032")).toThrow();
-  });
-
-  it("should accept valid base62 order keys", () => {
-    expect(() => validateOrderKey("Zz")).not.toThrow();
-    expect(() => validateOrderKey("a0")).not.toThrow();
-    expect(() => validateOrderKey("a1")).not.toThrow();
-    expect(() => validateOrderKey("a1V")).not.toThrow();
-    expect(() => validateOrderKey("z".padEnd(28, "z"))).not.toThrow();
-  });
-});
+import { InvalidFractionalIndexError } from "../src/fractionalIndex";

 describe("sync invalid indices with array order", () => {
  describe("should NOT sync empty array", () => {
@@ -124,46 +104,6 @@ describe("sync invalid indices with array order", () => {
    });
  });

-  describe("should sync when fractional index is malformed", () => {
-    // "zd0032" has head "z" which requires length 28 per getIntegerLength,
-    // but the string is far too short, so validateOrderKey throws for it
-    testInvalidIndicesSync({
-      elements: [{ id: "A", index: "zd0032" }],
-      expect: {
-        unchangedElements: [],
-      },
-    });
-
-    testInvalidIndicesSync({
-      elements: [
-        { id: "A", index: "a1" },
-        { id: "B", index: "zd0032" },
-        { id: "C", index: "a3" },
-      ],
-      expect: {
-        unchangedElements: ["A", "C"],
-      },
-    });
-
-    testInvalidIndicesSync({
-      elements: [{ id: "A", index: "a!" }],
-      expect: {
-        unchangedElements: [],
-      },
-    });
-
-    testInvalidIndicesSync({
-      elements: [
-        { id: "A", index: "a1" },
-        { id: "B", index: "a!" },
-        { id: "C", index: "a2" },
-      ],
-      expect: {
-        unchangedElements: ["A", "C"],
-      },
-    });
-  });
-
  describe("should sync when fractional indices are duplicated", () => {
    testInvalidIndicesSync({
      elements: [
@@ -2,27 +2,15 @@ import {
  convertToExcalidrawElements,
  Excalidraw,
 } from "@excalidraw/excalidraw";
-import { arrayToMap } from "@excalidraw/common";
-import { degreesToRadians, pointFrom } from "@excalidraw/math";

 import { API } from "@excalidraw/excalidraw/tests/helpers/api";
-import { Keyboard, Pointer, UI } from "@excalidraw/excalidraw/tests/helpers/ui";
-import { getTextEditor } from "@excalidraw/excalidraw/tests/queries/dom";
+import { Keyboard, Pointer } from "@excalidraw/excalidraw/tests/helpers/ui";
 import {
  getCloneByOrigId,
  render,
 } from "@excalidraw/excalidraw/tests/test-utils";

-import { getSelectedElements } from "@excalidraw/excalidraw/scene";
-
-import type { Degrees } from "@excalidraw/math";
-
-import { elementOverlapsWithFrame } from "../src/frame";
-
-import type {
-  ExcalidrawElement,
-  ExcalidrawFrameLikeElement,
-} from "../src/types";
+import type { ExcalidrawElement } from "../src/types";

 const { h } = window;
 const mouse = new Pointer("mouse");
@@ -137,352 +125,6 @@ describe("adding elements to frames", () => {
    });
  });

-  it("should treat an element fully containing a frame as overlapping the frame", () => {
-    const containingRect = API.createElement({
-      type: "rectangle",
-      x: -50,
-      y: -50,
-      width: 250,
-      height: 250,
-    });
-
-    API.setElements([containingRect, frame]);
-
-    expect(
-      elementOverlapsWithFrame(
-        containingRect,
-        frame as ExcalidrawFrameLikeElement,
-        arrayToMap(h.elements),
-      ),
-    ).toBe(true);
-  });
-
-  it("uses precise geometry (not the bounding box) to detect frame overlap", () => {
-    // a 300x200 frame at the origin, with shapes positioned just outside each
-    // corner so that their bounding box clips the frame but their actual
-    // outline does not. The precise `isElementIntersectingFrame` must report
-    // no overlap.
-    const overlapFrame = API.createElement({
-      type: "frame",
-      x: 0,
-      y: 0,
-      width: 300,
-      height: 200,
-    });
-    // clips the bottom-right corner; the rhombus tip stays out
-    const diamond = API.createElement({
-      type: "diamond",
-      x: 290,
-      y: 175,
-      width: 100,
-      height: 100,
-    });
-    // clips the bottom-left corner; rotated (NOT 45°, which would degenerate
-    // into an axis-aligned square whose shape fills its AABB)
-    const diamondRotated = API.createElement({
-      type: "diamond",
-      x: -50,
-      y: 195,
-      width: 100,
-      height: 100,
-      angle: degreesToRadians(45 as Degrees),
-    });
-    // clips the top-left corner; the curve doesn't reach the corner
-    const ellipse = API.createElement({
-      type: "ellipse",
-      x: -90,
-      y: -90,
-      width: 100,
-      height: 100,
-    });
-    // clips the top edge; the polyline weaves outside the frame
-    const line = API.createElement({
-      type: "line",
-      x: 130,
-      y: -20,
-      width: 293,
-      height: 183,
-      points: [
-        pointFrom(0, 0),
-        pointFrom(-165, -96),
-        pointFrom(-293, -16),
-        pointFrom(-162, 87),
-      ],
-    });
-    // clips the bottom-left corner; the stroke stays outside
-    const freedraw = API.createElement({
-      type: "freedraw",
-      x: -15,
-      y: 180,
-      width: 207,
-      height: 209,
-      points: [
-        pointFrom(0, 0),
-        pointFrom(-69, 99),
-        pointFrom(-33, 183),
-        pointFrom(48, 209),
-        pointFrom(124, 195),
-        pointFrom(138, 145),
-        pointFrom(123, 85),
-      ],
-    });
-    // clips the top-right corner, but its rounded corner is cut away from
-    // exactly that corner — so its actual outline stays outside
-    const roundedRect = API.createElement({
-      type: "rectangle",
-      x: 295,
-      y: -100,
-      width: 160,
-      height: 110,
-      roundness: { type: 3 },
-    });
-
-    API.setElements([
-      overlapFrame,
-      diamond,
-      diamondRotated,
-      ellipse,
-      line,
-      freedraw,
-      roundedRect,
-    ]);
-    const elementsMap = arrayToMap(h.elements);
-    const f = overlapFrame as ExcalidrawFrameLikeElement;
-
-    expect(elementOverlapsWithFrame(diamond, f, elementsMap)).toBe(false);
-    expect(elementOverlapsWithFrame(diamondRotated, f, elementsMap)).toBe(
-      false,
-    );
-    expect(elementOverlapsWithFrame(ellipse, f, elementsMap)).toBe(false);
-    expect(elementOverlapsWithFrame(line, f, elementsMap)).toBe(false);
-    expect(elementOverlapsWithFrame(freedraw, f, elementsMap)).toBe(false);
-    expect(elementOverlapsWithFrame(roundedRect, f, elementsMap)).toBe(false);
-  });
-
-  it("should not add a newly created element to a frame behind a non-frame element", () => {
-    const cover = API.createElement({
-      id: "cover",
-      type: "rectangle",
-      x: 10,
-      y: 10,
-      width: 80,
-      height: 80,
-      backgroundColor: "#ffc9c9",
-    });
-
-    API.setElements([frame, cover]);
-
-    UI.clickTool("rectangle");
-    mouse.downAt(20, 20);
-    mouse.moveTo(40, 40);
-    mouse.upAt(40, 40);
-
-    const createdElement = h.elements.find(
-      (element) => element.id !== frame.id && element.id !== cover.id,
-    );
-
-    expect(createdElement?.frameId).toBe(null);
-    expect(h.elements.map((element) => element.id)).toEqual([
-      frame.id,
-      cover.id,
-      createdElement?.id,
-    ]);
-  });
-
-  it("should add a newly created element to a frame over a non-frame element", () => {
-    const cover = API.createElement({
-      id: "cover",
-      type: "rectangle",
-      x: 10,
-      y: 10,
-      width: 80,
-      height: 80,
-      backgroundColor: "#ffc9c9",
-    });
-
-    API.setElements([cover, frame]);
-
-    UI.clickTool("rectangle");
-    mouse.downAt(20, 20);
-    mouse.moveTo(40, 40);
-    mouse.upAt(40, 40);
-
-    const createdElement = h.elements.find(
-      (element) => element.id !== frame.id && element.id !== cover.id,
-    );
-
-    expect(createdElement?.frameId).toBe(frame.id);
-  });
-
-  it("should highlight the target frame while creating a new element", () => {
-    API.setElements([frame]);
-
-    UI.clickTool("rectangle");
-    mouse.downAt(20, 20);
-    mouse.moveTo(40, 40);
-
-    expect(h.state.frameToHighlight?.id).toBe(frame.id);
-
-    mouse.upAt(40, 40);
-
-    expect(h.state.frameToHighlight).toBe(null);
-  });
-
-  it("should highlight the target frame while hovering with a creation tool", () => {
-    API.setElements([frame]);
-
-    UI.clickTool("rectangle");
-    mouse.moveTo(20, 20);
-
-    expect(h.state.frameToHighlight?.id).toBe(frame.id);
-
-    mouse.moveTo(200, 200);
-
-    expect(h.state.frameToHighlight).toBe(null);
-  });
-
-  it("should not add grid-snapped text outside the frame to the clicked frame", async () => {
-    const offsetFrame = API.createElement({
-      id: "offsetFrame",
-      type: "frame",
-      x: 10,
-      y: 0,
-      width: 150,
-      height: 150,
-    });
-
-    API.setElements([offsetFrame]);
-    API.setAppState({
-      gridModeEnabled: true,
-    });
-
-    UI.clickTool("text");
-    mouse.clickAt(12, 0);
-
-    await getTextEditor();
-
-    const createdText = h.elements.find(
-      (element) => element.id !== offsetFrame.id,
-    );
-
-    expect(createdText?.x).toBe(0);
-    expect(createdText?.y).toBe(0);
-    expect(createdText?.frameId).toBe(null);
-  });
-
-  it("should add a newly created element to a frame behind another frame", () => {
-    const lockedFrame = API.createElement({
-      id: "lockedFrame",
-      type: "frame",
-      x: 10,
-      y: 10,
-      width: 80,
-      height: 80,
-      locked: true,
-    });
-
-    API.setElements([frame, lockedFrame]);
-
-    UI.clickTool("rectangle");
-    mouse.downAt(20, 20);
-    mouse.moveTo(40, 40);
-    mouse.upAt(40, 40);
-
-    const createdElement = h.elements.find(
-      (element) => element.id !== frame.id && element.id !== lockedFrame.id,
-    );
-
-    expect(createdElement?.frameId).toBe(frame.id);
-  });
-
-  it("should insert a newly created frame child just below its frame", () => {
-    const frameChildUnderCursor = API.createElement({
-      id: "frameChildUnderCursor",
-      type: "rectangle",
-      x: 10,
-      y: 10,
-      width: 80,
-      height: 80,
-      backgroundColor: "#ffc9c9",
-      frameId: frame.id,
-    });
-    const otherFrameChild = API.createElement({
-      id: "otherFrameChild",
-      type: "rectangle",
-      x: 100,
-      y: 20,
-      width: 20,
-      height: 20,
-      frameId: frame.id,
-    });
-
-    API.setElements([frameChildUnderCursor, otherFrameChild, frame]);
-
-    UI.clickTool("rectangle");
-    mouse.downAt(20, 20);
-    mouse.moveTo(40, 40);
-    mouse.upAt(40, 40);
-
-    const createdElement = h.elements.find(
-      (element) =>
-        element.id !== frame.id &&
-        element.id !== frameChildUnderCursor.id &&
-        element.id !== otherFrameChild.id,
-    );
-
-    expect(createdElement?.frameId).toBe(frame.id);
-    expect(h.elements.map((element) => element.id)).toEqual([
-      frameChildUnderCursor.id,
-      otherFrameChild.id,
-      createdElement?.id,
-      frame.id,
-    ]);
-  });
-
-  it("should insert a newly created frame child above the highest frame child", () => {
-    const frameChildUnderCursor = API.createElement({
-      id: "frameChildUnderCursor",
-      type: "rectangle",
-      x: 10,
-      y: 10,
-      width: 80,
-      height: 80,
-      backgroundColor: "#ffc9c9",
-      frameId: frame.id,
-    });
-    const otherFrameChild = API.createElement({
-      id: "otherFrameChild",
-      type: "rectangle",
-      x: 100,
-      y: 20,
-      width: 20,
-      height: 20,
-      frameId: frame.id,
-    });
-
-    API.setElements([frame, frameChildUnderCursor, otherFrameChild]);
-
-    UI.clickTool("rectangle");
-    mouse.downAt(20, 20);
-    mouse.moveTo(40, 40);
-    mouse.upAt(40, 40);
-
-    const createdElement = h.elements.find(
-      (element) =>
-        element.id !== frame.id &&
-        element.id !== frameChildUnderCursor.id &&
-        element.id !== otherFrameChild.id,
-    );
-
-    expect(createdElement?.frameId).toBe(frame.id);
-    expect(h.elements.map((element) => element.id)).toEqual([
-      frame.id,
-      frameChildUnderCursor.id,
-      otherFrameChild.id,
-      createdElement?.id,
-    ]);
-  });
-
  const commonTestCases = async (
    func: typeof resizeFrameOverElement | typeof dragElementIntoFrame,
  ) => {
@@ -773,373 +415,6 @@ describe("adding elements to frames", () => {
  describe("dragging elements into the frame", async () => {
    await commonTestCases(dragElementIntoFrame);

-    it("should add a dragged element fully containing the frame", () => {
-      const containingRect = API.createElement({
-        type: "rectangle",
-        x: 220,
-        y: 20,
-        width: 300,
-        height: 300,
-      });
-
-      API.setElements([frame, containingRect]);
-
-      dragElementIntoFrame(frame, containingRect);
-
-      expect(API.getElement(containingRect).frameId).toBe(frame.id);
-    });
-
-    it("should drag an element into a frame", () => {
-      API.setElements([rect2, frame]);
-
-      dragElementIntoFrame(frame, rect2);
-
-      expect(rect2.frameId).toBe(frame.id);
-    });
-
-    it("should move an element dragged from one frame into another", () => {
-      const otherFrame = API.createElement({
-        id: "otherFrame",
-        type: "frame",
-        x: 300,
-        y: 0,
-        width: 150,
-        height: 150,
-      });
-      const frameChild = API.createElement({
-        id: "frameChild",
-        type: "rectangle",
-        x: 50,
-        y: 50,
-        width: 20,
-        height: 20,
-        frameId: frame.id,
-      });
-
-      API.setElements([frame, frameChild, otherFrame]);
-
-      expect(frameChild.frameId).toBe(frame.id);
-
-      dragElementIntoFrame(otherFrame, frameChild);
-
-      expect(frameChild.frameId).toBe(otherFrame.id);
-    });
-
-    it("should layer a dragged element above the highest frame child", () => {
-      const frameChild = API.createElement({
-        id: "frameChild",
-        type: "rectangle",
-        x: 10,
-        y: 10,
-        width: 20,
-        height: 20,
-        frameId: frame.id,
-      });
-
-      API.setElements([frame, frameChild, rect2]);
-
-      dragElementIntoFrame(frame, rect2);
-
-      expect(rect2.frameId).toBe(frame.id);
-      expect(h.elements.map((element) => element.id)).toEqual([
-        frame.id,
-        frameChild.id,
-        rect2.id,
-      ]);
-      expect(rect2.index! > frameChild.index!).toBe(true);
-      expect(rect2.index! > frame.index!).toBe(true);
-    });
-
-    it("should preview a dragged element above the highest frame child before pointerup", () => {
-      const frameChild = API.createElement({
-        id: "frameChild",
-        type: "rectangle",
-        x: 10,
-        y: 10,
-        width: 20,
-        height: 20,
-        frameId: frame.id,
-      });
-
-      API.setElements([rect2, frame, frameChild]);
-      API.setSelectedElements([rect2]);
-      API.updateElement(rect2, {
-        x: 10,
-        y: 10,
-      });
-
-      const getRenderableElementIds = (
-        selectedElementsAreBeingDragged: boolean,
-      ) => {
-        return h.app.renderer
-          .getRenderableElements({
-            zoom: h.state.zoom,
-            offsetLeft: 0,
-            offsetTop: 0,
-            scrollX: 0,
-            scrollY: 0,
-            height: 1000,
-            width: 1000,
-            editingTextElement: h.state.editingTextElement,
-            newElement: h.state.newElement,
-            selectedElements: getSelectedElements(h.elements, h.state),
-            selectedElementsAreBeingDragged,
-            frameToHighlight: frame as ExcalidrawFrameLikeElement,
-          })
-          .visibleElements.map((element) => element.id);
-      };
-
-      expect(h.elements.map((element) => element.id)).toEqual([
-        rect2.id,
-        frame.id,
-        frameChild.id,
-      ]);
-      expect(getRenderableElementIds(false)).toEqual([
-        rect2.id,
-        frame.id,
-        frameChild.id,
-      ]);
-      expect(getRenderableElementIds(true)).toEqual([
-        frame.id,
-        frameChild.id,
-        rect2.id,
-      ]);
-      expect(h.elements.map((element) => element.id)).toEqual([
-        rect2.id,
-        frame.id,
-        frameChild.id,
-      ]);
-      expect(rect2.frameId).toBe(null);
-    });
-
-    it("should not preview reorder dragged elements already in the highlighted frame", () => {
-      const frameChild = API.createElement({
-        id: "frameChild",
-        type: "rectangle",
-        x: 10,
-        y: 10,
-        width: 20,
-        height: 20,
-        frameId: frame.id,
-      });
-      const otherFrameChild = API.createElement({
-        id: "otherFrameChild",
-        type: "rectangle",
-        x: 40,
-        y: 10,
-        width: 20,
-        height: 20,
-        frameId: frame.id,
-      });
-
-      API.setElements([frameChild, frame, otherFrameChild]);
-      API.setSelectedElements([frameChild]);
-
-      const renderableElementIds = h.app.renderer
-        .getRenderableElements({
-          zoom: h.state.zoom,
-          offsetLeft: 0,
-          offsetTop: 0,
-          scrollX: 0,
-          scrollY: 0,
-          height: 1000,
-          width: 1000,
-          editingTextElement: h.state.editingTextElement,
-          newElement: h.state.newElement,
-          selectedElements: getSelectedElements(h.elements, h.state),
-          selectedElementsAreBeingDragged: true,
-          frameToHighlight: frame as ExcalidrawFrameLikeElement,
-        })
-        .visibleElements.map((element) => element.id);
-
-      expect(renderableElementIds).toEqual([
-        frameChild.id,
-        frame.id,
-        otherFrameChild.id,
-      ]);
-    });
-
-    it("should put a dragged mixed selection above the highest frame child", () => {
-      const frameChild = API.createElement({
-        id: "frameChild",
-        type: "rectangle",
-        x: 50,
-        y: 10,
-        width: 20,
-        height: 20,
-        frameId: frame.id,
-        boundElements: [{ id: "boundText", type: "text" }],
-      });
-      const boundText = API.createElement({
-        id: "boundText",
-        type: "text",
-        x: 50,
-        y: 10,
-        width: 20,
-        height: 20,
-        containerId: frameChild.id,
-        frameId: frame.id,
-      });
-      const otherFrameChild = API.createElement({
-        id: "otherFrameChild",
-        type: "rectangle",
-        x: 80,
-        y: 10,
-        width: 20,
-        height: 20,
-        frameId: frame.id,
-      });
-      const nonFrameElement = API.createElement({
-        id: "nonFrameElement",
-        type: "rectangle",
-        x: 155,
-        y: 10,
-        width: 20,
-        height: 20,
-      });
-
-      API.setElements([
-        frame,
-        frameChild,
-        boundText,
-        otherFrameChild,
-        nonFrameElement,
-      ]);
-      API.setSelectedElements([frameChild, nonFrameElement]);
-
-      mouse.downAt(
-        nonFrameElement.x + nonFrameElement.width / 2,
-        nonFrameElement.y + nonFrameElement.height / 2,
-      );
-      mouse.moveTo(frame.x + frame.width - 5, nonFrameElement.y + 10);
-      mouse.up();
-
-      expect(frameChild.frameId).toBe(frame.id);
-      expect(boundText.frameId).toBe(frame.id);
-      expect(nonFrameElement.frameId).toBe(frame.id);
-      expect(h.elements.map((element) => element.id)).toEqual([
-        frame.id,
-        otherFrameChild.id,
-        frameChild.id,
-        boundText.id,
-        nonFrameElement.id,
-      ]);
-    });
-
-    it("should not reorder dragged elements already in the highlighted frame", () => {
-      const frameChild = API.createElement({
-        id: "frameChild",
-        type: "rectangle",
-        x: 50,
-        y: 10,
-        width: 20,
-        height: 20,
-        frameId: frame.id,
-      });
-      const otherFrameChild = API.createElement({
-        id: "otherFrameChild",
-        type: "rectangle",
-        x: 80,
-        y: 10,
-        width: 20,
-        height: 20,
-        frameId: frame.id,
-      });
-
-      API.setElements([frame, frameChild, otherFrameChild]);
-      API.setSelectedElements([frameChild]);
-
-      mouse.downAt(
-        frameChild.x + frameChild.width / 2,
-        frameChild.y + frameChild.height / 2,
-      );
-      mouse.moveTo(frameChild.x + frameChild.width / 2 + 5, frameChild.y + 10);
-      mouse.up();
-
-      expect(frameChild.frameId).toBe(frame.id);
-      expect(h.elements.map((element) => element.id)).toEqual([
-        frame.id,
-        frameChild.id,
-        otherFrameChild.id,
-      ]);
-    });
-
-    it("should not drag an element into a frame behind a non-frame element", () => {
-      const cover = API.createElement({
-        id: "cover",
-        type: "rectangle",
-        x: 10,
-        y: 10,
-        width: 80,
-        height: 80,
-        backgroundColor: "#ffc9c9",
-      });
-      API.setElements([frame, cover, rect2]);
-
-      mouse.clickAt(rect2.x, rect2.y);
-      mouse.downAt(rect2.x + rect2.width / 2, rect2.y + rect2.height / 2);
-      mouse.moveTo(20, 20);
-      mouse.upAt(20, 20);
-
-      expect(rect2.frameId).toBe(null);
-    });
-
-    it("should drag an element into a frame over a non-frame element", () => {
-      const cover = API.createElement({
-        id: "cover",
-        type: "rectangle",
-        x: 10,
-        y: 10,
-        width: 80,
-        height: 80,
-        backgroundColor: "#ffc9c9",
-      });
-      API.setElements([cover, rect2, frame]);
-
-      mouse.clickAt(rect2.x, rect2.y);
-      mouse.downAt(rect2.x + rect2.width / 2, rect2.y + rect2.height / 2);
-      mouse.moveTo(20, 20);
-      mouse.upAt(20, 20);
-
-      expect(rect2.frameId).toBe(frame.id);
-    });
-
-    it("should keep dragging a frame child over a non-frame element above its frame", () => {
-      const cover = API.createElement({
-        id: "cover",
-        type: "rectangle",
-        x: 10,
-        y: 10,
-        width: 80,
-        height: 80,
-        backgroundColor: "#ffc9c9",
-      });
-      const frameChild = API.createElement({
-        id: "frameChild",
-        type: "rectangle",
-        x: 100,
-        y: 20,
-        width: 20,
-        height: 20,
-        frameId: frame.id,
-      });
-
-      API.setElements([frameChild, frame, cover]);
-      API.setSelectedElements([frameChild]);
-
-      mouse.downAt(
-        frameChild.x + frameChild.width / 2,
-        frameChild.y + frameChild.height / 2,
-      );
-      mouse.moveTo(20, 20);
-
-      expect(h.state.frameToHighlight?.id).toBe(frame.id);
-
-      mouse.upAt(20, 20);
-
-      expect(frameChild.frameId).toBe(frame.id);
-    });
-
    it.skip("should drag element inside, duplicate it and keep it in frame", () => {
      API.setElements([frame, rect2]);

@@ -326,59 +326,19 @@ describe("normalizeElementsOrder", () => {
      ]),
      [
        "BA_rect1",
-        "CBA_rect3",
-        "CBA_rect7",
        "BA_rect5",
        "BA_rect6",
        "A_rect2",
        "A_rect5",
+        "CBA_rect3",
+        "CBA_rect7",
        "rect4",
        "X_rect8",
-        "YX_rect10",
        "X_rect11",
+        "YX_rect10",
        "rect9",
      ],
    );
-    assertOrder(
-      normalizeElementOrder([
-        API.createElement({
-          id: "A_rect1",
-          type: "rectangle",
-          groupIds: ["A"],
-        }),
-        API.createElement({
-          id: "CBA_rect2",
-          type: "rectangle",
-          groupIds: ["C", "B", "A"],
-        }),
-        API.createElement({
-          id: "A_rect3",
-          type: "rectangle",
-          groupIds: ["A"],
-        }),
-      ]),
-      ["A_rect1", "CBA_rect2", "A_rect3"],
-    );
-    assertOrder(
-      normalizeElementOrder([
-        API.createElement({
-          id: "abcT_rect1",
-          type: "rectangle",
-          groupIds: ["ab", "c", "T"],
-        }),
-        API.createElement({
-          id: "abcT_rect2",
-          type: "rectangle",
-          groupIds: ["a", "bc", "T"],
-        }),
-        API.createElement({
-          id: "abcT_rect3",
-          type: "rectangle",
-          groupIds: ["ab", "c", "T"],
-        }),
-      ]),
-      ["abcT_rect1", "abcT_rect3", "abcT_rect2"],
-    );
  });

  // TODO
@@ -1509,190 +1509,4 @@ describe("z-indexing with frames", () => {
      ],
    });
  });
-
-  it("bringing to front / sending to back children of MULTIPLE frames at once moves all of them", () => {
-    assertZindex({
-      elements: [
-        { id: "F1_1", frameId: "F1", isSelected: true },
-        { id: "F1_2", frameId: "F1" },
-        { id: "F1", type: "frame" },
-        { id: "F2_1", frameId: "F2", isSelected: true },
-        { id: "F2_2", frameId: "F2" },
-        { id: "F2", type: "frame" },
-      ],
-      operations: [
-        // +∞: each selected child moves to the front of its own frame
-        [actionBringToFront, ["F1_2", "F1", "F1_1", "F2_2", "F2", "F2_1"]],
-        // -∞: each selected child moves to the back of its own frame
-        [actionSendToBack, ["F1_1", "F1_2", "F1", "F2_1", "F2_2", "F2"]],
-      ],
-    });
-  });
-
-  it("send to back / bring to front of a grouped frame child (in group-editing mode) must not duplicate elements", () => {
-    assertZindex({
-      elements: [
-        { id: "F1_1", frameId: "F1", groupIds: ["g1"] },
-        { id: "F1_2", frameId: "F1", groupIds: ["g1"], isSelected: true },
-        { id: "F1", type: "frame" },
-        { id: "F2_1", frameId: "F2", groupIds: ["g2"] },
-        { id: "F2_2", frameId: "F2", groupIds: ["g2"] },
-        { id: "F2", type: "frame" },
-      ],
-      appState: { editingGroupId: "g1" },
-      operations: [
-        // -∞ (send to back, within the frame)
-        [actionSendToBack, ["F1_2", "F1_1", "F1", "F2_1", "F2_2", "F2"]],
-        // +∞ (bring to front, within the frame)
-        [actionBringToFront, ["F1_1", "F1", "F1_2", "F2_1", "F2_2", "F2"]],
-      ],
-    });
-  });
-});
-
-/**
- * The inputs in this block intentionally VIOLATE the (soft) invariant that a
- * frame's children — and a group's members — are contiguous in the elements
- * array. Such states shouldn't occur in normal use, but they CAN arise from
- * bugs or broken input, because nothing re-defragments element order during
- * a reorder (`normalizeElementOrder` only runs on duplication). We keep these
- * tests so the reordering ops stay exercised against malformed order.
- *
- * HARD CONTRACT (a failure here is a real bug): a reorder must never throw,
- * duplicate, or drop elements. `assertReorderPreservesElements` checks this.
- *
- * SOFT SNAPSHOT (read before "fixing"): the exact resulting ORDER is NOT a
- * contract for invalid input — it's whatever the slice math happens to
- * produce. If a future change alters an `expected` order below, that is NOT
- * necessarily a functional regression. First confirm from the diff that the
- * hard contract still holds (nothing duplicated/lost), then update the
- * expected order to match, provided it's deemed an improvement over the
- * previous order, or it's an acceptable change given the underlying logic
- * change.
- */
-describe("z-index reordering with broken contiguity (invariant-violating input)", () => {
-  beforeEach(async () => {
-    await render(<Excalidraw />);
-  });
-
-  const assertReorderPreservesElements = (
-    elements: Parameters<typeof populateElements>[0],
-    appState: Parameters<typeof populateElements>[1],
-    // each op is applied to a freshly-populated (broken) state
-    cases: [Actions, string[]][],
-  ) => {
-    for (const [action, expected] of cases) {
-      populateElements(elements, appState);
-      const before = h.elements.map((el) => el.id);
-
-      expect(() => API.executeAction(action)).not.toThrow();
-
-      const after = h.elements.map((el) => el.id);
-      // hard contract:
-      expect(after.length).toBe(before.length); // no loss
-      expect(new Set(after).size).toBe(after.length); // no duplication
-      // soft snapshot (see block comment before changing):
-      expect(after).toEqual(expected);
-    }
-  };
-
-  it("discontiguous frame children (foreign frame's child interleaved in span)", () => {
-    // F2_1 (a child of frame F2) sits INSIDE frame F1's z-span. Reordering F1's
-    // child sweeps F2_1 along (span-based frame handling) — wrong ordering, but
-    // never a duplication/loss, and the op does not throw.
-    const elements: Parameters<typeof populateElements>[0] = [
-      { id: "F1_1", frameId: "F1", isSelected: true },
-      { id: "F2_1", frameId: "F2" },
-      { id: "F1_2", frameId: "F1" },
-      { id: "F1", type: "frame" },
-      { id: "F2", type: "frame" },
-    ];
-    assertReorderPreservesElements(elements, undefined, [
-      [actionBringForward, ["F2_1", "F1_2", "F1_1", "F1", "F2"]],
-      [actionSendBackward, ["F1_1", "F2_1", "F1_2", "F1", "F2"]],
-      [actionBringToFront, ["F2_1", "F1_2", "F1", "F1_1", "F2"]],
-      [actionSendToBack, ["F1_1", "F2_1", "F1_2", "F1", "F2"]],
-    ]);
-  });
-
-  it("discontiguous group, whole group selected", () => {
-    // g1 = {A, C}, scattered by the loose elements B and D.
-    const elements: Parameters<typeof populateElements>[0] = [
-      { id: "A", groupIds: ["g1"], isSelected: true },
-      { id: "B" },
-      { id: "C", groupIds: ["g1"], isSelected: true },
-      { id: "D" },
-    ];
-    assertReorderPreservesElements(elements, undefined, [
-      // move-by-one leaves the group scattered (each run moves independently)
-      [actionBringForward, ["B", "A", "D", "C"]],
-      [actionSendBackward, ["A", "C", "B", "D"]],
-      // to-front / to-back gather the scattered members back into one block
-      [actionBringToFront, ["B", "D", "A", "C"]],
-      [actionSendToBack, ["A", "C", "B", "D"]],
-    ]);
-  });
-
-  it("discontiguous group, single member selected in group-editing mode", () => {
-    const elements: Parameters<typeof populateElements>[0] = [
-      { id: "A", groupIds: ["g1"] },
-      { id: "B" },
-      { id: "C", groupIds: ["g1"], isSelected: true },
-      { id: "D" },
-    ];
-    assertReorderPreservesElements(elements, { editingGroupId: "g1" }, [
-      [actionBringForward, ["A", "B", "C", "D"]],
-      [actionSendBackward, ["C", "A", "B", "D"]],
-      [actionBringToFront, ["A", "B", "C", "D"]],
-      [actionSendToBack, ["C", "A", "B", "D"]],
-    ]);
-  });
-
-  it("two interleaved groups, both fully selected", () => {
-    const elements: Parameters<typeof populateElements>[0] = [
-      { id: "A", groupIds: ["g1"], isSelected: true },
-      { id: "X", groupIds: ["g2"], isSelected: true },
-      { id: "C", groupIds: ["g1"], isSelected: true },
-      { id: "Y", groupIds: ["g2"], isSelected: true },
-      { id: "Z" },
-    ];
-    assertReorderPreservesElements(elements, undefined, [
-      [actionBringForward, ["Z", "A", "X", "C", "Y"]],
-      [actionSendBackward, ["A", "X", "C", "Y", "Z"]],
-      [actionBringToFront, ["Z", "A", "X", "C", "Y"]],
-      [actionSendToBack, ["A", "X", "C", "Y", "Z"]],
-    ]);
-  });
-});
-
-describe("z-index reordering with inconsistent group-editing state", () => {
-  beforeEach(async () => {
-    await render(<Excalidraw />);
-  });
-
-  it("does not duplicate or drop elements when selected elements fall outside the edited group scope", () => {
-    assertZindex({
-      elements: [
-        { id: "A", groupIds: ["g1"], isSelected: true },
-        { id: "C", groupIds: ["g1"] },
-        { id: "X", groupIds: ["g2"] },
-        { id: "Y", groupIds: ["g2"] },
-        { id: "R" },
-      ],
-      appState: { editingGroupId: "g2" },
-      operations: [[actionSendToBack, ["A", "C", "X", "Y", "R"]]],
-    });
-
-    assertZindex({
-      elements: [
-        { id: "A", groupIds: ["g1"] },
-        { id: "C", groupIds: ["g1"] },
-        { id: "X", groupIds: ["g2"], isSelected: true },
-        { id: "Y", groupIds: ["g2"] },
-        { id: "R" },
-      ],
-      appState: { editingGroupId: "g1" },
-      operations: [[actionBringToFront, ["A", "C", "X", "Y", "R"]]],
-    });
-  });
 });
@@ -17,13 +17,6 @@ Please add the latest change on the top under the correct section.

 ### Breaking changes

- Theme changes initiated by the default UI are now delegated to `<Excalidraw onThemeChange={(theme) => ...} />` when supplied. If `onThemeChange` is not supplied, light/dark theme toggling still falls back to updating the internal editor state.
-
-  - `MainMenu.DefaultItems.ToggleTheme` no longer accepts the item-level `onSelect` callback. Host apps that need to control light/dark/system theme should pass `onThemeChange` to `<Excalidraw />` instead.
-  - `MainMenu.DefaultItems.ToggleTheme` with system theme support now uses `allowSystemTheme` together with `theme={Theme | "system"}` only to render the selected value. For the regular light/dark item, pass `allowSystemTheme={false}`.
-  - `CommandPalette.defaultItems.toggleTheme` was removed. The default theme command is now rendered by the command palette itself when `UIOptions.canvasActions.toggleTheme` enables the action (see below).
-  - `UIOptions.canvasActions.toggleTheme` still controls default theme UI availability. When it is `null`, it defaults to `true` if `props.theme` is omitted or `props.onThemeChange` is supplied, and otherwise defaults to disabled.
-
 - Renamed the `excalidrawAPI` prop to `onExcalidrawAPI`.
  - `onExcalidrawAPI` is now called on mount (instead of during constructor), and later on unmount (with `null` value). The API may be removed altogether in the future (you can use `onMount` & `onUmount` to manage the `ExcalidrawAPI` object (e.g. to cache it to a global state), already).

@@ -477,28 +477,17 @@ export const actionToggleTheme = register<AppState["theme"]>({
    appState.theme === THEME.LIGHT ? MoonIcon : SunIcon,
  viewMode: true,
  trackEvent: { category: "canvas" },
-  perform: (_, appState, value, app) => {
-    const nextTheme =
-      value || (appState.theme === THEME.LIGHT ? THEME.DARK : THEME.LIGHT);
-
-    if (app.props.onThemeChange) {
-      app.props.onThemeChange(nextTheme);
-      return false;
-    }
-
+  perform: (_, appState, value) => {
    return {
      appState: {
        ...appState,
-        theme: nextTheme,
+        theme:
+          value || (appState.theme === THEME.LIGHT ? THEME.DARK : THEME.LIGHT),
      },
      captureUpdate: CaptureUpdateAction.EVENTUALLY,
    };
  },
-  keyTest: (event) =>
-    !event[KEYS.CTRL_OR_CMD] &&
-    event.altKey &&
-    event.shiftKey &&
-    event.code === CODES.D,
+  keyTest: (event) => event.altKey && event.shiftKey && event.code === CODES.D,
  predicate: (elements, appState, props, app) => {
    return !!app.props.UIOptions.canvasActions.toggleTheme;
  },
@@ -1,147 +0,0 @@
-import {
-  getElementsInGroup,
-  isSomeElementSelected,
-  makeNextSelectedElementIds,
-  selectGroupsForSelectedElements,
-} from "@excalidraw/element";
-import { CaptureUpdateAction } from "@excalidraw/element";
-import { KEYS, isWritableElement, updateActiveTool } from "@excalidraw/common";
-
-import type { GroupId } from "@excalidraw/element/types";
-
-import { register } from "./register";
-
-import type { AppClassProperties, AppState } from "../types";
-
-const getNextActiveTool = (
-  appState: Readonly<AppState>,
-  app: AppClassProperties,
-) => {
-  if (appState.activeTool.type === "eraser") {
-    return updateActiveTool(appState, {
-      ...(appState.activeTool.lastActiveTool || {
-        type: app.state.preferredSelectionTool.type,
-      }),
-      lastActiveToolBeforeEraser: null,
-    });
-  }
-
-  return updateActiveTool(appState, {
-    type: app.state.preferredSelectionTool.type,
-  });
-};
-
-const getParentEditingGroupId = (
-  appState: Readonly<AppState>,
-  app: AppClassProperties,
-  selectedElementIds: AppState["selectedElementIds"],
-): GroupId | null => {
-  if (!appState.editingGroupId) {
-    return null;
-  }
-
-  const nonDeletedElements = app.scene.getNonDeletedElements();
-  const selectedElements = app.scene.getSelectedElements({
-    selectedElementIds,
-    elements: nonDeletedElements,
-  });
-  const candidateElements = selectedElements.length
-    ? selectedElements
-    : getElementsInGroup(nonDeletedElements, appState.editingGroupId);
-
-  for (const element of candidateElements) {
-    const editingGroupIndex = element.groupIds.indexOf(appState.editingGroupId);
-    if (editingGroupIndex !== -1 && element.groupIds[editingGroupIndex + 1]) {
-      return element.groupIds[editingGroupIndex + 1] as GroupId;
-    }
-  }
-
-  return null;
-};
-
-export const actionDeselect = register({
-  name: "deselect",
-  label: "",
-  trackEvent: false,
-  perform: (_elements, appState, _, app) => {
-    const activeTool = getNextActiveTool(appState, app);
-
-    if (appState.editingGroupId) {
-      const nonDeletedElements = app.scene.getNonDeletedElements();
-      const selectedElementIds =
-        Object.keys(appState.selectedElementIds).length > 0
-          ? appState.selectedElementIds
-          : getElementsInGroup(
-              nonDeletedElements,
-              appState.editingGroupId,
-            ).reduce((acc, element) => {
-              acc[element.id] = true;
-              return acc;
-            }, {} as Record<string, true>);
-
-      return {
-        appState: {
-          ...appState,
-          ...selectGroupsForSelectedElements(
-            {
-              editingGroupId: getParentEditingGroupId(
-                appState,
-                app,
-                selectedElementIds,
-              ),
-              selectedElementIds,
-            },
-            nonDeletedElements,
-            appState,
-            app,
-          ),
-          activeEmbeddable: null,
-          activeTool,
-          selectedLinearElement: null,
-          selectionElement: null,
-          showHyperlinkPopup: false,
-          suggestedBinding: null,
-          frameToHighlight: null,
-        },
-        captureUpdate: CaptureUpdateAction.IMMEDIATELY,
-      };
-    }
-
-    return {
-      appState: {
-        ...appState,
-        activeEmbeddable: null,
-        activeTool,
-        editingGroupId: null,
-        selectedElementIds: makeNextSelectedElementIds({}, appState),
-        selectedGroupIds: {},
-        selectedLinearElement: null,
-        selectionElement: null,
-        showHyperlinkPopup: false,
-        suggestedBinding: null,
-        frameToHighlight: null,
-      },
-      captureUpdate: CaptureUpdateAction.IMMEDIATELY,
-    };
-  },
-  keyTest: (event, appState, _, app) => {
-    if (event.key !== KEYS.ESCAPE) {
-      return false;
-    }
-
-    if (isWritableElement(event.target)) {
-      return false;
-    }
-
-    return (
-      !appState.newElement &&
-      appState.multiElement === null &&
-      !appState.selectedLinearElement?.isEditing &&
-      (appState.activeEmbeddable !== null ||
-        appState.activeTool.type !== app.state.preferredSelectionTool.type ||
-        !!appState.editingGroupId ||
-        !!appState.selectedLinearElement ||
-        isSomeElementSelected(app.scene.getNonDeletedElements(), appState))
-    );
-  },
-});
@@ -329,8 +329,8 @@ export const actionFinalize = register<FormData>({
        selectionElement: null,
        multiElement: null,
        editingTextElement: null,
+        startBoundElement: null,
        suggestedBinding: null,
-        frameToHighlight: null,
        selectedElementIds:
          element &&
          !appState.activeTool.locked &&
@@ -348,7 +348,9 @@ export const actionFinalize = register<FormData>({
    };
  },
  keyTest: (event, appState) =>
-    (event.key === KEYS.ESCAPE && appState.selectedLinearElement?.isEditing) ||
+    (event.key === KEYS.ESCAPE &&
+      (appState.selectedLinearElement?.isEditing ||
+        (!appState.newElement && appState.multiElement === null))) ||
    ((event.key === KEYS.ESCAPE || event.key === KEYS.ENTER) &&
      appState.multiElement !== null),
  PanelComponent: ({ appState, updateData, data }) => (
@@ -205,6 +205,7 @@ export const actionWrapSelectionInFrame = register({
      [...app.scene.getElementsIncludingDeleted(), frame],
      selectedElements,
      frame,
+      appState,
    );

    return {
@@ -277,6 +277,7 @@ export const actionUngroup = register({
            elementsMap,
          ),
          frame,
+          app,
        );
      }
    });
@@ -1,4 +1,5 @@
 import {
+  isWindows,
  KEYS,
  matchKey,
  arrayToMap,
@@ -113,7 +114,7 @@ export const createRedoAction: ActionCreator = (history) => ({
    ),
  keyTest: (event) =>
    (event[KEYS.CTRL_OR_CMD] && event.shiftKey && matchKey(event, KEYS.Z)) ||
-    (event[KEYS.CTRL_OR_CMD] && !event.shiftKey && matchKey(event, KEYS.Y)),
+    (isWindows && event.ctrlKey && !event.shiftKey && matchKey(event, KEYS.Y)),
  PanelComponent: ({ appState, updateData, data, app }) => {
    const { isRedoStackEmpty } = useEmitter(
      history.onHistoryChangedEmitter,
@@ -34,7 +34,6 @@ export {
 export { actionSetEmbeddableAsActiveTool } from "./actionEmbeddable";

 export { actionFinalize } from "./actionFinalize";
-export { actionDeselect } from "./actionDeselect";

 export {
  actionChangeProjectName,
@@ -114,7 +114,6 @@ export type ActionName =
  | "distributeVertically"
  | "flipHorizontal"
  | "flipVertical"
-  | "deselect"
  | "viewMode"
  | "exportWithDarkMode"
  | "toggleTheme"
@@ -1,4 +1,5 @@
 import { LaserPointer } from "@excalidraw/laser-pointer";
+
 import {
  SVG_NS,
  getSvgPathFromStroke,
@@ -7,8 +8,7 @@ import {

 import type { LaserPointerOptions } from "@excalidraw/laser-pointer";

-import { AnimationController } from "./renderer/animation";
-
+import type { AnimationFrameHandler } from "./animation-frame-handler";
 import type App from "./components/App";
 import type { AppState } from "./types";

@@ -34,16 +34,15 @@ export class AnimatedTrail implements Trail {
  private container?: SVGSVGElement;
  private trailElement: SVGPathElement;
  private trailAnimation?: SVGAnimateElement;
-  private key: string;
-
-  private static counter = 0;

  constructor(
+    private animationFrameHandler: AnimationFrameHandler,
    protected app: App,
    private options: Partial<LaserPointerOptions> &
      Partial<AnimatedTrailOptions>,
  ) {
-    this.key = `animated-trail-${AnimatedTrail.counter++}`;
+    this.animationFrameHandler.register(this, this.onFrame.bind(this));
+
    this.trailElement = document.createElementNS(SVG_NS, "path");
    if (this.options.animateTrail) {
      this.trailAnimation = document.createElementNS(SVG_NS, "animate");
@@ -74,15 +73,6 @@ export class AnimatedTrail implements Trail {
    return false;
  }

-  private cleanup() {
-    this.pastTrails = [];
-    this.currentTrail = undefined;
-
-    if (this.trailElement.parentNode === this.container) {
-      this.container?.removeChild(this.trailElement);
-    }
-  }
-
  start(container?: SVGSVGElement) {
    if (container) {
      this.container = container;
@@ -92,23 +82,15 @@ export class AnimatedTrail implements Trail {
      this.container.appendChild(this.trailElement);
    }

-    if (!AnimationController.running(this.key)) {
-      AnimationController.start(this.key, () => {
-        const needsNext = this.onFrame();
-        if (needsNext) {
-          return { keep: true };
-        }
-
-        this.cleanup();
-
-        return null;
-      });
-    }
+    this.animationFrameHandler.start(this);
  }

  stop() {
-    AnimationController.cancel(this.key);
-    this.cleanup();
+    this.animationFrameHandler.stop(this);
+
+    if (this.trailElement.parentNode === this.container) {
+      this.container?.removeChild(this.trailElement);
+    }
  }

  startPath(x: number, y: number) {
@@ -163,25 +145,21 @@ export class AnimatedTrail implements Trail {

    if (this.currentTrail) {
      const currentPath = this.drawTrail(this.currentTrail, this.app.state);
+
      paths.push(currentPath);
    }

-    this.pastTrails = this.pastTrails.filter(
-      (t) =>
-        t.getStrokeOutline(t.options.size / this.app.state.zoom.value)
-          .length !== 0,
-    );
+    this.pastTrails = this.pastTrails.filter((trail) => {
+      return trail.getStrokeOutline().length !== 0;
+    });

    if (paths.length === 0) {
-      // Clean up the SVG path if there are no trails to render
-      this.trailElement.setAttribute("d", "");
-
-      return false;
+      this.stop();
    }

    const svgPaths = paths.join(" ").trim();
-    this.trailElement.setAttribute("d", svgPaths);

+    this.trailElement.setAttribute("d", svgPaths);
    if (this.trailAnimation) {
      this.trailElement.setAttribute(
        "fill",
@@ -197,8 +175,6 @@ export class AnimatedTrail implements Trail {
        (this.options.fill ?? (() => "black"))(this),
      );
    }
-
-    return true;
  }

  private drawTrail(trail: LaserPointer, state: AppState): string {
@@ -0,0 +1,79 @@
+export type AnimationCallback = (timestamp: number) => void | boolean;
+
+export type AnimationTarget = {
+  callback: AnimationCallback;
+  stopped: boolean;
+};
+
+export class AnimationFrameHandler {
+  private targets = new WeakMap<object, AnimationTarget>();
+  private rafIds = new WeakMap<object, number>();
+
+  register(key: object, callback: AnimationCallback) {
+    this.targets.set(key, { callback, stopped: true });
+  }
+
+  start(key: object) {
+    const target = this.targets.get(key);
+
+    if (!target) {
+      return;
+    }
+
+    if (this.rafIds.has(key)) {
+      return;
+    }
+
+    this.targets.set(key, { ...target, stopped: false });
+    this.scheduleFrame(key);
+  }
+
+  stop(key: object) {
+    const target = this.targets.get(key);
+    if (target && !target.stopped) {
+      this.targets.set(key, { ...target, stopped: true });
+    }
+
+    this.cancelFrame(key);
+  }
+
+  private constructFrame(key: object): FrameRequestCallback {
+    return (timestamp: number) => {
+      const target = this.targets.get(key);
+
+      if (!target) {
+        return;
+      }
+
+      const shouldAbort = this.onFrame(target, timestamp);
+
+      if (!target.stopped && !shouldAbort) {
+        this.scheduleFrame(key);
+      } else {
+        this.cancelFrame(key);
+      }
+    };
+  }
+
+  private scheduleFrame(key: object) {
+    const rafId = requestAnimationFrame(this.constructFrame(key));
+
+    this.rafIds.set(key, rafId);
+  }
+
+  private cancelFrame(key: object) {
+    if (this.rafIds.has(key)) {
+      const rafId = this.rafIds.get(key)!;
+
+      cancelAnimationFrame(rafId);
+    }
+
+    this.rafIds.delete(key);
+  }
+
+  private onFrame(target: AnimationTarget, timestamp: number): boolean {
+    const shouldAbort = target.callback(timestamp);
+
+    return shouldAbort ?? false;
+  }
+}
@@ -99,6 +99,7 @@ export const getDefaultAppState = (): Omit<
      open: false,
      panels: STATS_PANELS.generalStats | STATS_PANELS.elementProperties,
    },
+    startBoundElement: null,
    suggestedBinding: null,
    frameRendering: { enabled: true, clip: true, name: true, outline: true },
    frameToHighlight: null,
@@ -127,7 +128,6 @@ export const getDefaultAppState = (): Omit<
    lockedMultiSelections: {},
    activeLockedId: null,
    bindMode: "orbit",
-    boxSelectionMode: "contain",
  };
 };

@@ -193,7 +193,6 @@ const APP_STATE_STORAGE_CONF = (<
  gridModeEnabled: { browser: true, export: true, server: true },
  height: { browser: false, export: false, server: false },
  isBindingEnabled: { browser: true, export: false, server: false },
-  boxSelectionMode: { browser: true, export: false, server: false },
  bindingPreference: { browser: true, export: false, server: false },
  isMidpointSnappingEnabled: { browser: true, export: false, server: false },
  defaultSidebarDockedPreference: {
@@ -230,6 +229,7 @@ const APP_STATE_STORAGE_CONF = (<
  selectionElement: { browser: false, export: false, server: false },
  shouldCacheIgnoreZoom: { browser: true, export: false, server: false },
  stats: { browser: true, export: false, server: false },
+  startBoundElement: { browser: false, export: false, server: false },
  suggestedBinding: { browser: false, export: false, server: false },
  frameRendering: { browser: false, export: false, server: false },
  frameToHighlight: { browser: false, export: false, server: false },
@@ -27,7 +27,7 @@ import {
  KEYS,
  APP_NAME,
  CURSOR_TYPE,
-  DEFAULT_TRANSFORM_HANDLE_SPACING,
+  DEFAULT_MAX_IMAGE_WIDTH_OR_HEIGHT,
  DEFAULT_VERTICAL_ALIGN,
  DRAGGING_THRESHOLD,
  ELEMENT_SHIFT_TRANSLATE_AMOUNT,
@@ -37,6 +37,7 @@ import {
  IMAGE_MIME_TYPES,
  IMAGE_RENDER_TIMEOUT,
  LINE_CONFIRM_THRESHOLD,
+  MAX_ALLOWED_FILE_BYTES,
  MIME_TYPES,
  MQ_RIGHT_SIDEBAR_MIN_WIDTH,
  POINTER_BUTTON,
@@ -174,9 +175,7 @@ import {
  isValidTextContainer,
  redrawTextBoundingBox,
  hasBoundingBox,
-  getCommonFrameId,
  getFrameChildren,
-  getFrameChildrenInsertionIndex,
  isCursorInFrame,
  addElementsToFrame,
  replaceAllElementsInFrame,
@@ -259,7 +258,6 @@ import {
  maybeHandleArrowPointlikeDrag,
  getUncroppedWidthAndHeight,
  getActiveTextElement,
-  isEligibleFrameChildType,
 } from "@excalidraw/element";

 import type { GlobalPoint, LocalPoint, Radians } from "@excalidraw/math";
@@ -343,6 +341,7 @@ import { ActionManager } from "../actions/manager";
 import { actions } from "../actions/register";
 import { getShortcutFromShortcutName } from "../actions/shortcuts";
 import { trackEvent } from "../analytics";
+import { AnimationFrameHandler } from "../animation-frame-handler";
 import {
  getDefaultAppState,
  isEraserActive,
@@ -416,7 +415,7 @@ import {
  setCursorForShape,
 } from "../cursor";
 import { ElementCanvasButtons } from "../components/ElementCanvasButtons";
-import { LaserTrails } from "../laserTrails";
+import { LaserTrails } from "../laser-trails";
 import { withBatchedUpdates, withBatchedUpdatesThrottled } from "../reactUtils";
 import { isPointHittingTextAutoResizeHandle } from "../textAutoResizeHandle";
 import { textWysiwyg } from "../wysiwyg/textWysiwyg";
@@ -603,8 +602,6 @@ const YOUTUBE_VIDEO_STATES = new Map<
  ValueOf<typeof YOUTUBE_STATES>
 >();

-const MAX_EMBEDDABLE_VIEWPORT_SCALE = 4;
-
 let IS_PLAIN_PASTE = false;
 let IS_PLAIN_PASTE_TIMER = 0;
 let PLAIN_PASTE_TOAST_SHOWN = false;
@@ -702,9 +699,11 @@ class App extends React.Component<AppProps, AppState> {
  previousPointerMoveCoords: { x: number; y: number } | null = null;
  lastViewportPosition = { x: 0, y: 0 };

-  laserTrails = new LaserTrails(this);
-  eraserTrail = new EraserTrail(this);
-  lassoTrail = new LassoTrail(this);
+  animationFrameHandler = new AnimationFrameHandler();
+
+  laserTrails = new LaserTrails(this.animationFrameHandler, this);
+  eraserTrail = new EraserTrail(this.animationFrameHandler, this);
+  lassoTrail = new LassoTrail(this.animationFrameHandler, this);

  onChangeEmitter = new Emitter<
    [
@@ -1735,18 +1734,6 @@ class App extends React.Component<AppProps, AppState> {
            this.state.activeEmbeddable?.element === el &&
            this.state.activeEmbeddable?.state === "hover";

-          // scale video embeds based on zoom (capped) so that smaller embeds
-          // on canvas when zoomed are still of legible quality
-          // (note: for some embed types like gdrive, the quality is poor when
-          // scaling mid playback and works only when you initially start the
-          // playback at the higher zoom level)
-          const shouldScaleEmbeddableViewport = src?.type === "video";
-          const embeddableViewportScale = clamp(
-            shouldScaleEmbeddableViewport ? scale : 1,
-            0.75,
-            MAX_EMBEDDABLE_VIEWPORT_SCALE,
-          );
-
          return (
            <div
              key={el.id}
@@ -1813,42 +1800,31 @@ class App extends React.Component<AppProps, AppState> {
                    padding: `${el.strokeWidth}px`,
                  }}
                >
-                  <div
-                    className="excalidraw__embeddable__content"
-                    style={{
-                      width: `${embeddableViewportScale * 100}%`,
-                      height: `${embeddableViewportScale * 100}%`,
-                      transform: `scale(${1 / embeddableViewportScale})`,
-                    }}
-                  >
-                    {(isEmbeddableElement(el)
-                      ? this.props.renderEmbeddable?.(el, this.state)
-                      : null) ?? (
-                      <iframe
-                        ref={(ref) => this.cacheEmbeddableRef(el, ref)}
-                        className="excalidraw__embeddable"
-                        srcDoc={
-                          src?.type === "document"
-                            ? src.srcdoc(this.state.theme)
-                            : undefined
-                        }
-                        src={
-                          src?.type !== "document" ? src?.link ?? "" : undefined
-                        }
-                        // https://stackoverflow.com/q/18470015
-                        scrolling="no"
-                        referrerPolicy="no-referrer-when-downgrade"
-                        title="Excalidraw Embedded Content"
-                        allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
-                        allowFullScreen={true}
-                        sandbox={`${
-                          src?.sandbox?.allowSameOrigin
-                            ? "allow-same-origin"
-                            : ""
-                        } allow-scripts allow-forms allow-popups allow-popups-to-escape-sandbox allow-presentation allow-downloads`}
-                      />
-                    )}
-                  </div>
+                  {(isEmbeddableElement(el)
+                    ? this.props.renderEmbeddable?.(el, this.state)
+                    : null) ?? (
+                    <iframe
+                      ref={(ref) => this.cacheEmbeddableRef(el, ref)}
+                      className="excalidraw__embeddable"
+                      srcDoc={
+                        src?.type === "document"
+                          ? src.srcdoc(this.state.theme)
+                          : undefined
+                      }
+                      src={
+                        src?.type !== "document" ? src?.link ?? "" : undefined
+                      }
+                      // https://stackoverflow.com/q/18470015
+                      scrolling="no"
+                      referrerPolicy="no-referrer-when-downgrade"
+                      title="Excalidraw Embedded Content"
+                      allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+                      allowFullScreen={true}
+                      sandbox={`${
+                        src?.sandbox?.allowSameOrigin ? "allow-same-origin" : ""
+                      } allow-scripts allow-forms allow-popups allow-popups-to-escape-sandbox allow-presentation allow-downloads`}
+                    />
+                  )}
                </div>
              </div>
            </div>
@@ -1995,10 +1971,9 @@ class App extends React.Component<AppProps, AppState> {
              }
            }}
            style={{
-              background: applyDarkModeFilter(
-                this.state.viewBackgroundColor,
-                isDarkTheme,
-              ),
+              background: isDarkTheme
+                ? applyDarkModeFilter(this.state.viewBackgroundColor)
+                : this.state.viewBackgroundColor,
              zIndex: 2,
              border: "none",
              display: "block",
@@ -2091,30 +2066,20 @@ class App extends React.Component<AppProps, AppState> {
    const selectedElements = this.scene.getSelectedElements(this.state);
    const { renderTopRightUI, renderTopLeftUI, renderCustomStats } = this.props;

-    const {
-      elementsMap,
-      visibleElements,
-      canvasNonce,
-      /**
-       * element to draw on the <NewElementCanvas> for optimization purposes.
-       * Can be null even if this.state.newElement defined
-       * (e.g. when its zIndex isn't on top) */
-      newElementCanvasElement,
-    } = this.renderer.getRenderableElements({
-      zoom: this.state.zoom,
-      offsetLeft: this.state.offsetLeft,
-      offsetTop: this.state.offsetTop,
-      scrollX: this.state.scrollX,
-      scrollY: this.state.scrollY,
-      height: this.state.height,
-      width: this.state.width,
-      editingTextElement: this.state.editingTextElement,
-      newElement: this.state.newElement,
-      selectedElements,
-      selectedElementsAreBeingDragged:
-        this.state.selectedElementsAreBeingDragged,
-      frameToHighlight: this.state.frameToHighlight,
-    });
+    const sceneNonce = this.scene.getSceneNonce();
+    const { elementsMap, visibleElements } =
+      this.renderer.getRenderableElements({
+        sceneNonce,
+        zoom: this.state.zoom,
+        offsetLeft: this.state.offsetLeft,
+        offsetTop: this.state.offsetTop,
+        scrollX: this.state.scrollX,
+        scrollY: this.state.scrollY,
+        height: this.state.height,
+        width: this.state.width,
+        editingTextElement: this.state.editingTextElement,
+        newElementId: this.state.newElement?.id,
+      });
    this.visibleElements = visibleElements;

    const allElementsMap = this.scene.getNonDeletedElementsMap();
@@ -2333,7 +2298,7 @@ class App extends React.Component<AppProps, AppState> {
                            elementsMap={elementsMap}
                            allElementsMap={allElementsMap}
                            visibleElements={visibleElements}
-                            canvasNonce={canvasNonce}
+                            sceneNonce={sceneNonce}
                            selectionNonce={
                              this.state.selectionElement?.versionNonce
                            }
@@ -2354,10 +2319,9 @@ class App extends React.Component<AppProps, AppState> {
                              theme: this.state.theme,
                            }}
                          />
-                          {newElementCanvasElement && (
+                          {this.state.newElement && (
                            <NewElementCanvas
                              appState={this.state}
-                              newElement={newElementCanvasElement}
                              scale={window.devicePixelRatio}
                              rc={this.rc}
                              elementsMap={elementsMap}
@@ -2385,7 +2349,7 @@ class App extends React.Component<AppProps, AppState> {
                            visibleElements={visibleElements}
                            allElementsMap={allElementsMap}
                            selectedElements={selectedElements}
-                            canvasNonce={canvasNonce}
+                            sceneNonce={sceneNonce}
                            selectionNonce={
                              this.state.selectionElement?.versionNonce
                            }
@@ -2560,7 +2524,6 @@ class App extends React.Component<AppProps, AppState> {
    const magicFrameChildren = getElementsOverlappingFrame(
      this.scene.getNonDeletedElements(),
      magicFrame,
-      this.scene.getNonDeletedElementsMap(),
    ).filter((el) => !isMagicFrameElement(el));

    if (!magicFrameChildren.length) {
@@ -2697,7 +2660,7 @@ class App extends React.Component<AppProps, AppState> {
          locked: false,
        });

-        this.insertNewElement(frame);
+        this.scene.insertElement(frame);

        for (const child of selectedElements) {
          this.scene.mutateElement(child, { frameId: frame.id });
@@ -3775,7 +3738,6 @@ class App extends React.Component<AppProps, AppState> {
        position:
          this.editorInterface.formFactor === "desktop" ? "cursor" : "center",
        retainSeed: isPlainPaste,
-        preserveFrameChildrenOrder: true,
      });
      return;
    }
@@ -3919,7 +3881,6 @@ class App extends React.Component<AppProps, AppState> {
    position: { clientX: number; clientY: number } | "cursor" | "center";
    retainSeed?: boolean;
    fitToContent?: boolean;
-    preserveFrameChildrenOrder?: boolean;
  }) => {
    const elements = restoreElements(opts.elements, null, {
      deleteInvisibleElements: true,
@@ -3961,7 +3922,6 @@ class App extends React.Component<AppProps, AppState> {
        });
      }),
      randomizeSeed: !opts.retainSeed,
-      preserveFrameChildrenOrder: opts.preserveFrameChildrenOrder,
    });

    const prevElements = this.scene.getElementsIncludingDeleted();
@@ -3983,10 +3943,11 @@ class App extends React.Component<AppProps, AppState> {
        duplicatedElements,
        topLayerFrame,
      );
-      nextElements = addElementsToFrame(
+      addElementsToFrame(
        nextElements,
        eligibleElements,
        topLayerFrame,
+        this.state,
      );
    }

@@ -4212,7 +4173,7 @@ class App extends React.Component<AppProps, AppState> {
      return;
    }

-    this.insertNewElements(textElements);
+    this.scene.insertElements(textElements);
    this.store.scheduleCapture();
    this.setState({
      selectedElementIds: makeNextSelectedElementIds(
@@ -4613,7 +4574,6 @@ class App extends React.Component<AppProps, AppState> {
      }

      if (collaborators) {
-        this.laserTrails.updateCollabTrails(collaborators);
        this.setState({ collaborators });
      }
    },
@@ -5469,7 +5429,7 @@ class App extends React.Component<AppProps, AppState> {
    if (!event[KEYS.CTRL_OR_CMD]) {
      if (this.flowChartCreator.isCreatingChart) {
        if (this.flowChartCreator.pendingNodes?.length) {
-          this.insertNewElements(this.flowChartCreator.pendingNodes);
+          this.scene.insertElements(this.flowChartCreator.pendingNodes);
        }

        const firstNode = this.flowChartCreator.pendingNodes?.[0];
@@ -5567,7 +5527,6 @@ class App extends React.Component<AppProps, AppState> {
        selectedLinearElement: isSelectionLikeTool(nextActiveTool.type)
          ? prevState.selectedLinearElement
          : null,
-        frameToHighlight: null,
      } as const;

      if (nextActiveTool.type === "freedraw") {
@@ -5766,13 +5725,13 @@ class App extends React.Component<AppProps, AppState> {
        const isDeleted = !nextOriginalText.trim();
        updateElement(nextOriginalText, isDeleted);

-        // keyboard-submit keeps focus on the edited object. For bound text, keep
-        // the container selected even if the text becomes empty and is deleted.
-        const elementIdToSelect = viaKeyboard
-          ? element.containerId || (!isDeleted ? element.id : null)
-          : null;
+        // select the created text element only if submitting via keyboard
+        // (when submitting via click it should act as signal to deselect)
+        if (!isDeleted && viaKeyboard) {
+          const elementIdToSelect = element.containerId
+            ? element.containerId
+            : element.id;

-        if (elementIdToSelect) {
          // needed to ensure state is updated before "finalize" action
          // that's invoked on keyboard-submit as well
          // TODO either move this into finalize as well, or handle all state
@@ -6165,12 +6124,6 @@ class App extends React.Component<AppProps, AppState> {
        hitElement = elements[index];
        break;
      } else if (x1 < x && x < x2 && y1 < y && y < y2) {
-        // to allow binding to containers within frames,
-        // ignore frames in hit testing
-        if (isFrameLikeElement(elements[index])) {
-          continue;
-        }
-
        hitElement = elements[index];
        break;
      }
@@ -6260,6 +6213,11 @@ class App extends React.Component<AppProps, AppState> {
      }
    }

+    const topLayerFrame = this.getTopLayerFrameAtSceneCoords({
+      x: sceneX,
+      y: sceneY,
+    });
+
    const textCreationGridPoint = this.getTextCreationGridPoint(sceneX, sceneY);

    const newTextElementPosition = parentCenterPosition
@@ -6281,20 +6239,6 @@ class App extends React.Component<AppProps, AppState> {
          y: sceneY,
        };

-    const topLayerFrame = this.getTopLayerFrameAtSceneCoords({
-      x: newTextElementPosition.x,
-      y: newTextElementPosition.y,
-    });
-
-    // container has higher priority. Only add to frame if container is in the same frame.
-    const frameId =
-      topLayerFrame &&
-      (!shouldBindToContainer ||
-        !container ||
-        container.frameId === topLayerFrame.id)
-        ? topLayerFrame.id
-        : null;
-
    const element =
      existingTextElement ||
      newTextElement({
@@ -6324,7 +6268,7 @@ class App extends React.Component<AppProps, AppState> {
            ? (0 as Radians)
            : container.angle
          : (0 as Radians),
-        frameId,
+        frameId: topLayerFrame ? topLayerFrame.id : null,
      });

    if (!existingTextElement && shouldBindToContainer && container) {
@@ -6340,12 +6284,9 @@ class App extends React.Component<AppProps, AppState> {
    if (!existingTextElement) {
      if (container && shouldBindToContainer) {
        const containerIndex = this.scene.getElementIndex(container.id);
-        // TODO should use insertNewElement, after we update it to handle
-        // elements with containerId + frameId at the same time (containerId
-        // should take precedence when it comes to z-index)
-        this.scene.insertElementsAtIndex([element], containerIndex + 1);
+        this.scene.insertElementAtIndex(element, containerIndex + 1);
      } else {
-        this.insertNewElement(element);
+        this.scene.insertElement(element);
      }
    }

@@ -6727,161 +6668,19 @@ class App extends React.Component<AppProps, AppState> {
    }
  };

-  /**
-   * finds candidate frame under cursor (when dragging frame children/elements
-   * inside frames)
-   */
-  private getTopLayerFrameAtSceneCoords = (
-    /**
-     * should be already grid aligned (basically should be what the call site
-     * sets the element's coords to, if applicable)
-     */
-    sceneCoords: {
-      x: number;
-      y: number;
-    },
-    opts?: {
-      /** to exclude selected elements when dragging, etc. */
-      excludeElementIds?: AppState["selectedElementIds"];
-      currentFrameId?: ExcalidrawElement["frameId"];
-    },
-  ) => {
+  private getTopLayerFrameAtSceneCoords = (sceneCoords: {
+    x: number;
+    y: number;
+  }) => {
    const elementsMap = this.scene.getNonDeletedElementsMap();
-    const framesUnderCursor = this.scene
+    const frames = this.scene
      .getNonDeletedFramesLikes()
      .filter(
        (frame): frame is ExcalidrawFrameLikeElement =>
          !frame.locked && isCursorInFrame(sceneCoords, frame, elementsMap),
      );

-    if (!framesUnderCursor.length) {
-      return null;
-    }
-
-    const topLayerFrame = framesUnderCursor.at(-1)!;
-
-    const hitElement = this.getElementsAtPosition(
-      sceneCoords.x,
-      sceneCoords.y,
-      {
-        includeLockedElements: true,
-      },
-    ).findLast((element) => !opts?.excludeElementIds?.[element.id]);
-
-    if (hitElement) {
-      if (
-        isFrameLikeElement(hitElement) &&
-        // case: we're hitting a locked frame itself (frame's outline
-        // or later its bg once implemented)
-        !hitElement.locked
-      ) {
-        return topLayerFrame;
-      }
-
-      const hitElementIndex = this.scene.getElementIndex(hitElement.id);
-      const topLayerFrameIndex = this.scene.getElementIndex(topLayerFrame.id);
-
-      if (
-        hitElementIndex !== -1 &&
-        topLayerFrameIndex !== -1 &&
-        hitElementIndex <= topLayerFrameIndex
-      ) {
-        return topLayerFrame;
-      }
-
-      // to support a case of dragging a pre-existing frame child underneath
-      // a non-frame element covering the cursor
-      const currentFrame = opts?.currentFrameId
-        ? framesUnderCursor.find((frame) => frame.id === opts.currentFrameId) ??
-          null
-        : null;
-
-      if (currentFrame) {
-        return currentFrame;
-      }
-
-      return hitElement.frameId
-        ? framesUnderCursor.find((frame) => frame.id === hitElement.frameId) ??
-            null
-        : null;
-    }
-
-    return topLayerFrame;
-  };
-
-  private updateFrameToHighlight = (
-    frameToHighlight: AppState["frameToHighlight"],
-  ) => {
-    if (this.state.frameToHighlight !== frameToHighlight) {
-      this.setState({ frameToHighlight });
-    }
-  };
-
-  private maybeUpdateFrameToHighlightOnPointerMove = (
-    sceneCoords: { x: number; y: number },
-    isOverScrollBar: boolean,
-  ) => {
-    // currently this function is being called even during pointerdown so we
-    // need to make sure we don't re-set the state when dragging and similar
-    //
-    // But, we still want to reset on pointermove in case the state is stale
-    // so we updte even for non-eligible tool types
-    if (
-      this.state.newElement ||
-      this.state.multiElement ||
-      this.state.selectionElement ||
-      this.state.selectedElementsAreBeingDragged
-    ) {
-      return;
-    }
-
-    this.updateFrameToHighlight(
-      !isOverScrollBar && isEligibleFrameChildType(this.state.activeTool.type)
-        ? this.getTopLayerFrameAtSceneCoords(sceneCoords)
-        : null,
-    );
-  };
-
-  private insertNewElements = (elements: readonly ExcalidrawElement[]) => {
-    if (!elements.length) {
-      return;
-    }
-
-    const chunkedElements: ExcalidrawElement[][] = [];
-
-    for (const element of elements) {
-      const currentChunk = chunkedElements[chunkedElements.length - 1];
-
-      if (currentChunk?.[0].frameId === element.frameId) {
-        currentChunk.push(element);
-      } else {
-        chunkedElements.push([element]);
-      }
-    }
-
-    for (const chunk of chunkedElements) {
-      const frameId = chunk[0].frameId;
-
-      const insertionIndex = frameId
-        ? getFrameChildrenInsertionIndex(
-            this.scene.getElementsIncludingDeleted(),
-            frameId,
-          )
-        : null;
-      this.scene.insertElementsAtIndex(chunk, insertionIndex);
-    }
-  };
-
-  private insertNewElement = (element: ExcalidrawElement) => {
-    this.insertNewElements([element]);
-
-    const frame = element.frameId
-      ? this.scene.getNonDeletedElement(element.frameId)
-      : null;
-
-    this.updateFrameToHighlight(
-      frame && isFrameLikeElement(frame) ? frame : null,
-    );
+    return frames.length ? frames[frames.length - 1] : null;
  };

  private handleCanvasPointerMove = (
@@ -6983,14 +6782,6 @@ class App extends React.Component<AppProps, AppState> {
      }
    }

-    this.maybeUpdateFrameToHighlightOnPointerMove(
-      {
-        x: scenePointerX,
-        y: scenePointerY,
-      },
-      isOverScrollBar,
-    );
-
    if (
      !this.state.newElement &&
      isActiveToolNonLinearSnappable(this.state.activeTool.type)
@@ -7129,7 +6920,7 @@ class App extends React.Component<AppProps, AppState> {
              y: scenePointerY,
            },
          });
-          this.setState({ suggestedBinding: null });
+          this.setState({ suggestedBinding: null, startBoundElement: null });
          if (!this.state.activeTool.locked) {
            resetCursor(this.interactiveCanvas);
            this.setState((prevState) => ({
@@ -7448,14 +7239,6 @@ class App extends React.Component<AppProps, AppState> {
          this.interactiveCanvas,
          isTextElement(hitElement) ? CURSOR_TYPE.TEXT : CURSOR_TYPE.CROSSHAIR,
        );
-      } else if (
-        !event[KEYS.CTRL_OR_CMD] &&
-        this.isHittingCommonBoundingBoxOfSelectedElements(
-          scenePointer,
-          selectedElements,
-        )
-      ) {
-        setCursor(this.interactiveCanvas, CURSOR_TYPE.MOVE);
      } else if (this.state.viewModeEnabled) {
        setCursor(this.interactiveCanvas, CURSOR_TYPE.GRAB);
      } else if (this.state.openDialog?.name === "elementLinkSelector") {
@@ -7773,6 +7556,7 @@ class App extends React.Component<AppProps, AppState> {
        appState: {
          newElement: null,
          editingTextElement: null,
+          startBoundElement: null,
          suggestedBinding: null,
          selectedElementIds: makeNextSelectedElementIds(
            Object.keys(this.state.selectedElementIds)
@@ -7946,24 +7730,17 @@ class App extends React.Component<AppProps, AppState> {
      const hitSelectedElement =
        pointerDownState.hit.element &&
        this.isASelectedElement(pointerDownState.hit.element);
-      const shouldForceLassoReselect =
-        event.altKey &&
-        event[KEYS.CTRL_OR_CMD] &&
-        !pointerDownState.resize.handleType;
-      const shouldStartLassoSelection =
-        shouldForceLassoReselect ||
-        (!pointerDownState.hit.hasHitCommonBoundingBoxOfSelectedElements &&
-          !pointerDownState.resize.handleType &&
-          !hitSelectedElement);

-      if (shouldStartLassoSelection) {
-        if (!this.lassoTrail.hasCurrentTrail) {
-          this.lassoTrail.startPath(
-            pointerDownState.origin.x,
-            pointerDownState.origin.y,
-            event.shiftKey,
-          );
-        }
+      if (
+        !pointerDownState.hit.hasHitCommonBoundingBoxOfSelectedElements &&
+        !pointerDownState.resize.handleType &&
+        !hitSelectedElement
+      ) {
+        this.lassoTrail.startPath(
+          pointerDownState.origin.x,
+          pointerDownState.origin.y,
+          event.shiftKey,
+        );

        // block dragging after lasso selection on PCs until the next pointer down
        // (on mobile or tablet, we want to allow user to drag immediately)
@@ -8952,14 +8729,12 @@ class App extends React.Component<AppProps, AppState> {
      DEFAULT_COLLISION_THRESHOLD / this.state.zoom.value,
      1,
    );
-    const boundsPadding =
-      (DEFAULT_TRANSFORM_HANDLE_SPACING * 2) / this.state.zoom.value;
    const [x1, y1, x2, y2] = getCommonBounds(selectedElements);
    return (
-      point.x > x1 - boundsPadding - threshold &&
-      point.x < x2 + boundsPadding + threshold &&
-      point.y > y1 - boundsPadding - threshold &&
-      point.y < y2 + boundsPadding + threshold
+      point.x > x1 - threshold &&
+      point.x < x2 + threshold &&
+      point.y > y1 - threshold &&
+      point.y < y2 + threshold
    );
  }

@@ -9045,7 +8820,7 @@ class App extends React.Component<AppProps, AppState> {
      pressures: simulatePressure ? [] : [event.pressure],
    });

-    this.insertNewElement(element);
+    this.scene.insertElement(element);

    this.setState((prevState) => {
      const nextSelectedElementIds = {
@@ -9060,8 +8835,18 @@ class App extends React.Component<AppProps, AppState> {
      };
    });

+    const boundElement = getHoveredElementForBinding(
+      pointFrom<GlobalPoint>(
+        pointerDownState.origin.x,
+        pointerDownState.origin.y,
+      ),
+      this.scene.getNonDeletedElements(),
+      this.scene.getNonDeletedElementsMap(),
+    );
+
    this.setState({
      newElement: element,
+      startBoundElement: boundElement,
      suggestedBinding: null,
    });
  };
@@ -9102,7 +8887,7 @@ class App extends React.Component<AppProps, AppState> {
      height,
    });

-    this.insertNewElement(element);
+    this.scene.insertElement(element);

    return element;
  };
@@ -9156,7 +8941,7 @@ class App extends React.Component<AppProps, AppState> {
      link,
    });

-    this.insertNewElement(element);
+    this.scene.insertElement(element);

    return element;
  };
@@ -9400,7 +9185,7 @@ class App extends React.Component<AppProps, AppState> {
        points: [pointFrom<LocalPoint>(0, 0), pointFrom<LocalPoint>(0, 0)],
      });

-      this.insertNewElement(element);
+      this.scene.insertElement(element);

      if (isBindingElement(element)) {
        // Do the initial binding so the binding strategy has the initial state
@@ -9558,7 +9343,7 @@ class App extends React.Component<AppProps, AppState> {
        selectionElement: element,
      });
    } else {
-      this.insertNewElement(element);
+      this.scene.insertElement(element);
      this.setState({
        multiElement: null,
        newElement: element,
@@ -9591,7 +9376,7 @@ class App extends React.Component<AppProps, AppState> {
        ? newMagicFrameElement(constructorOpts)
        : newFrameElement(constructorOpts);

-    this.insertNewElement(frame);
+    this.scene.insertElement(frame);

    this.setState({
      multiElement: null,
@@ -9959,17 +9744,18 @@ class App extends React.Component<AppProps, AppState> {
          return;
        }

-        const selectedElementsHasAFrame = selectedElements.some((e) =>
+        const selectedElementsHasAFrame = selectedElements.find((e) =>
          isFrameLikeElement(e),
        );
-        const frameToHighlight = selectedElementsHasAFrame
-          ? null
-          : this.getTopLayerFrameAtSceneCoords(pointerCoords, {
-              currentFrameId: getCommonFrameId(selectedElements),
-              excludeElementIds: this.state.selectedElementIds,
-            });
+        const topLayerFrame = this.getTopLayerFrameAtSceneCoords(pointerCoords);
+        const frameToHighlight =
+          topLayerFrame && !selectedElementsHasAFrame ? topLayerFrame : null;
        // Only update the state if there is a difference
-        this.updateFrameToHighlight(frameToHighlight);
+        if (this.state.frameToHighlight !== frameToHighlight) {
+          flushSync(() => {
+            this.setState({ frameToHighlight });
+          });
+        }

        // Marking that click was used for dragging to check
        // if elements should be deselected on pointerup
@@ -10405,38 +10191,20 @@ class App extends React.Component<AppProps, AppState> {
          );

          let linearElementEditor = this.state.selectedLinearElement;
-
-          if (
-            !linearElementEditor ||
-            linearElementEditor.elementId !== newElement.id
-          ) {
+          if (!linearElementEditor) {
            linearElementEditor = new LinearElementEditor(
              newElement,
              this.scene.getNonDeletedElementsMap(),
            );
-          }
-
-          const lastClickedPointOutOfBounds =
-            linearElementEditor &&
-            (linearElementEditor.initialState.lastClickedPoint < 0 ||
-              linearElementEditor.initialState.lastClickedPoint >=
-                points.length);
-          if (lastClickedPointOutOfBounds) {
-            console.warn(
-              "Last clicked point is out of bounds. Attempting to fix it.",
-            );
            linearElementEditor = {
              ...linearElementEditor,
-              selectedPointsIndices: [points.length - 1],
+              selectedPointsIndices: [1],
              initialState: {
                ...linearElementEditor.initialState,
-                prevSelectedPointsIndices: null,
-                lastClickedPoint: points.length - 1,
+                lastClickedPoint: 1,
              },
-              hoverPointIndex: points.length - 1,
            };
          }
-
          this.setState({
            newElement,
            ...LinearElementEditor.handlePointDragging(
@@ -10499,7 +10267,6 @@ class App extends React.Component<AppProps, AppState> {
                this.state.selectionElement,
                this.scene.getNonDeletedElementsMap(),
                false,
-                this.state.boxSelectionMode,
              )
            : [];

@@ -10931,7 +10698,7 @@ class App extends React.Component<AppProps, AppState> {
              sceneCoords,
            });
          }
-          this.setState({ suggestedBinding: null });
+          this.setState({ suggestedBinding: null, startBoundElement: null });
          if (!activeTool.locked) {
            resetCursor(this.interactiveCanvas);
            this.setState((prevState) => ({
@@ -10952,9 +10719,9 @@ class App extends React.Component<AppProps, AppState> {
              ),
            }));
          } else {
-            this.setState({
+            this.setState((prevState) => ({
              newElement: null,
-            });
+            }));
          }
          // so that the scene gets rendered again to display the newly drawn linear as well
          this.scene.triggerUpdate();
@@ -11016,6 +10783,7 @@ class App extends React.Component<AppProps, AppState> {
            this.scene.getElementsMapIncludingDeleted(),
            elementsInsideFrame,
            newElement,
+            this.state,
          ),
        );
      }
@@ -11075,14 +10843,9 @@ class App extends React.Component<AppProps, AppState> {
          }
        } else {
          // update the relationships between selected elements and frames
+          const topLayerFrame = this.getTopLayerFrameAtSceneCoords(sceneCoords);
+
          const selectedElements = this.scene.getSelectedElements(this.state);
-          const topLayerFrame = this.getTopLayerFrameAtSceneCoords(
-            sceneCoords,
-            {
-              currentFrameId: getCommonFrameId(selectedElements),
-              excludeElementIds: this.state.selectedElementIds,
-            },
-          );
          let nextElements = this.scene.getElementsMapIncludingDeleted();

          const updateGroupIdsAfterEditingGroup = (
@@ -11131,8 +10894,10 @@ class App extends React.Component<AppProps, AppState> {
            topLayerFrame &&
            !this.state.selectedElementIds[topLayerFrame.id]
          ) {
-            const elementsToAdd = selectedElements.filter((element) =>
-              isElementInFrame(element, nextElements, this.state),
+            const elementsToAdd = selectedElements.filter(
+              (element) =>
+                element.frameId !== topLayerFrame.id &&
+                isElementInFrame(element, nextElements, this.state),
            );

            if (this.state.editingGroupId) {
@@ -11143,6 +10908,7 @@ class App extends React.Component<AppProps, AppState> {
              nextElements,
              elementsToAdd,
              topLayerFrame,
+              this.state,
            );
          } else if (!topLayerFrame) {
            if (this.state.editingGroupId) {
@@ -11204,6 +10970,7 @@ class App extends React.Component<AppProps, AppState> {
              elementsMap,
            ),
            frame,
+            this,
          );
        }

@@ -11718,11 +11485,9 @@ class App extends React.Component<AppProps, AppState> {

    const existingFileData = this.files[fileId];
    if (!existingFileData?.dataURL) {
-      const { maxWidthOrHeight, maxFileSizeBytes } = this.props.imageOptions;
-
      try {
        imageFile = await resizeImageFile(imageFile, {
-          maxWidthOrHeight,
+          maxWidthOrHeight: DEFAULT_MAX_IMAGE_WIDTH_OR_HEIGHT,
        });
      } catch (error: any) {
        console.error(
@@ -11731,10 +11496,10 @@ class App extends React.Component<AppProps, AppState> {
        );
      }

-      if (imageFile.size > maxFileSizeBytes) {
+      if (imageFile.size > MAX_ALLOWED_FILE_BYTES) {
        throw new Error(
          t("errors.fileTooBig", {
-            maxSize: `${Math.trunc(maxFileSizeBytes / 1024 / 1024)}MB`,
+            maxSize: `${Math.trunc(MAX_ALLOWED_FILE_BYTES / 1024 / 1024)}MB`,
          }),
        );
      }
@@ -12021,7 +11786,7 @@ class App extends React.Component<AppProps, AppState> {
      sceneY,
      gridPadding,
    );
-    this.insertNewElements(placeholders);
+    placeholders.forEach((el) => this.scene.insertElement(el));

    // Create, position, insert and select initialized (replacing placeholders)
    const initialized = await Promise.all(
@@ -12149,7 +11914,6 @@ class App extends React.Component<AppProps, AppState> {
              type: "everything",
              elements: item.elements,
              randomizeSeed: true,
-              preserveFrameChildrenOrder: true,
            }).duplicatedElements,
          }));

@@ -19,7 +19,6 @@ import {
  actionClearCanvas,
  actionLink,
  actionToggleSearchMenu,
-  actionToggleTheme,
 } from "../../actions";
 import {
  actionCopyElementLink,
@@ -425,7 +424,6 @@ function CommandPaletteInner({
      ];

      const additionalCommands: CommandPaletteItem[] = [
-        actionToCommand(actionToggleTheme, DEFAULT_CATEGORIES.app),
        {
          label: t("toolBar.library"),
          category: DEFAULT_CATEGORIES.app,
@@ -1 +1,12 @@
-export {};
+import { actionToggleTheme } from "../../actions";
+
+import type { CommandPaletteItem } from "./types";
+
+export const toggleTheme: CommandPaletteItem = {
+  ...actionToggleTheme,
+  category: "App",
+  label: "Toggle theme",
+  perform: ({ actionManager }) => {
+    actionManager.executeAction(actionToggleTheme, "commandPalette");
+  },
+};
@@ -831,13 +831,14 @@ const convertElementType = <
      newElement({
        ...element,
        type: targetType,
-        roundness: element.roundness
-          ? {
-              type: isUsingAdaptiveRadius(targetType)
-                ? ROUNDNESS.ADAPTIVE_RADIUS
-                : ROUNDNESS.PROPORTIONAL_RADIUS,
-            }
-          : element.roundness,
+        roundness:
+          targetType === "diamond" && element.roundness
+            ? {
+                type: isUsingAdaptiveRadius(targetType)
+                  ? ROUNDNESS.ADAPTIVE_RADIUS
+                  : ROUNDNESS.PROPORTIONAL_RADIUS,
+              }
+            : element.roundness,
      }),
    ) as typeof element;

@@ -46,7 +46,6 @@ import {
 import { fontPickerKeyHandler } from "./keyboardNavHandlers";

 import type { JSX } from "react";
-import type { ExcalidrawFontFace } from "../../fonts/ExcalidrawFontFace";

 export interface FontDescriptor {
  value: number;
@@ -87,15 +86,6 @@ const getFontFamilyIcon = (fontFamily: FontFamilyValues): JSX.Element => {
  }
 };

-const getFontFamilyLabel = (
-  fontFamily: FontFamilyValues,
-  fontFaces: ExcalidrawFontFace[],
-) =>
-  // prefer our config as the browser resolved names may be wrapped in quotes and such
-  Object.entries(FONT_FAMILY).find(([, id]) => id === fontFamily)?.[0] ??
-  fontFaces[0]?.fontFace?.family ??
-  "Unknown";
-
 export const FontPickerList = React.memo(
  ({
    selectedFontFamily,
@@ -124,7 +114,7 @@ export const FontPickerList = React.memo(
            const fontDescriptor = {
              value: familyId,
              icon: getFontFamilyIcon(familyId),
-              text: getFontFamilyLabel(familyId, fontFaces),
+              text: fontFaces[0]?.fontFace?.family ?? "Unknown",
            };

            if (metadata.deprecated) {
@@ -4,13 +4,11 @@ import { isDarwin, isFirefox, isWindows } from "@excalidraw/common";

 import { KEYS } from "@excalidraw/common";

-import { actionToggleTheme } from "../actions";
 import { getShortcutFromShortcutName } from "../actions/shortcuts";
 import { probablySupportsClipboardBlob } from "../clipboard";
 import { t } from "../i18n";
 import { getShortcutKey } from "../shortcut";

-import { useExcalidrawActionManager } from "./App";
 import { Dialog } from "./Dialog";
 import { ExternalLinkIcon, GithubIcon, youtubeIcon } from "./icons";

@@ -126,7 +124,6 @@ const ShortcutKey = (props: { children: React.ReactNode }) => (
 );

 export const HelpDialog = ({ onClose }: { onClose?: () => void }) => {
-  const actionManager = useExcalidrawActionManager();
  const handleClose = React.useCallback(() => {
    if (onClose) {
      onClose();
@@ -305,12 +302,10 @@ export const HelpDialog = ({ onClose }: { onClose?: () => void }) => {
              label={t("labels.viewMode")}
              shortcuts={[getShortcutKey("Alt+R")]}
            />
-            {actionManager.isActionEnabled(actionToggleTheme) && (
-              <Shortcut
-                label={t("labels.toggleTheme")}
-                shortcuts={[getShortcutKey("Alt+Shift+D")]}
-              />
-            )}
+            <Shortcut
+              label={t("labels.toggleTheme")}
+              shortcuts={[getShortcutKey("Alt+Shift+D")]}
+            />
            <Shortcut
              label={t("stats.fullTitle")}
              shortcuts={[getShortcutKey("Alt+/")]}
@@ -7,6 +7,7 @@
    border-radius: var(--border-radius-lg);
    padding: calc(var(--padding) * var(--space-factor));
    position: relative;
+    transition: box-shadow 0.5s ease-in-out;

    &.zen-mode {
      box-shadow: none;
@@ -122,7 +122,7 @@ const DefaultMainMenu: React.FC<{
        <MainMenu.DefaultItems.Socials />
      </MainMenu.Group>
      <MainMenu.Separator />
-      <MainMenu.DefaultItems.ToggleTheme allowSystemTheme={false} />
+      <MainMenu.DefaultItems.ToggleTheme />
      <MainMenu.DefaultItems.ChangeCanvasBackground />
    </MainMenu>
  );
@@ -650,7 +650,8 @@ const LayerUI = ({
 };

 const stripIrrelevantAppStateProps = (appState: AppState): UIAppState => {
-  const { cursorButton, scrollX, scrollY, ...ret } = appState;
+  const { startBoundElement, cursorButton, scrollX, scrollY, ...ret } =
+    appState;
  return ret;
 };

@@ -199,7 +199,6 @@ export default function LibraryMenuItems({
            type: "everything",
            elements: item.elements,
            randomizeSeed: true,
-            preserveFrameChildrenOrder: true,
          }).duplicatedElements,
        };
      });
@@ -26,17 +26,13 @@
    background: var(--RadioGroup-background);
    border: 1px solid var(--RadioGroup-border);

-    gap: 2px;
-
    &__choice {
-      box-sizing: content-box;
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
-      min-width: 20px;
+      width: 32px;
      height: 24px;
-      padding: 0 0.375rem;

      color: var(--RadioGroup-choice-color-off);
      background: var(--RadioGroup-choice-background-off);
@@ -51,11 +47,13 @@
      user-select: none;
      letter-spacing: 0.4px;

+      transition: all 75ms ease-out;
+
      &:hover {
        color: var(--RadioGroup-choice-color-off-hover);
      }

-      &:not(.active):active {
+      &:active {
        background: var(--RadioGroup-choice-background-off-active);
      }

@@ -2,7 +2,7 @@ import { useEffect, useRef } from "react";

 import "./SVGLayer.scss";

-import type { Trail } from "../animatedTrail";
+import type { Trail } from "../animated-trail";

 type SVGLayerProps = {
  trails: Trail[];
@@ -206,6 +206,7 @@ const handleDimensionChange: DragInputCallbackType<
          scene.getElementsIncludingDeleted(),
          nextElementsInFrame,
          latestElement,
+          app,
        );

        scene.replaceAllElements(updatedElements);
@@ -301,6 +302,7 @@ const handleDragFinished: DragFinishedCallbackType = ({
      app.scene.getElementsIncludingDeleted(),
      nextElementsInFrame,
      latestElement,
+      app,
    );

    app.scene.replaceAllElements(updatedElements);
@@ -261,6 +261,7 @@ const handleDimensionChange: DragInputCallbackType<
              scene.getElementsIncludingDeleted(),
              nextElementsInFrame,
              latestElement,
+              app,
            );

            scene.replaceAllElements(updatedElements);
@@ -415,6 +416,7 @@ const handleDragFinished: DragFinishedCallbackType = ({
      app.scene.getElementsIncludingDeleted(),
      nextElementsInFrame,
      latestElement,
+      app,
    );

    app.scene.replaceAllElements(updatedElements);
@@ -750,7 +750,7 @@ describe("frame resizing behavior", () => {
      x: 0,
      y: 0,
      width: 100,
-      height: 103,
+      height: 100,
    });

    // Create a rectangle outside the frame
@@ -3,7 +3,25 @@
 $verticalBreakpoint: 861px;

 .excalidraw {
+  --ttd-mermaid-token-keyword: #0000ff;
+  --ttd-mermaid-token-string: #a31515;
+  --ttd-mermaid-token-comment: #008000;
+  --ttd-mermaid-token-number: #098658;
+  --ttd-mermaid-token-operator: #1e1e1e;
+  --ttd-mermaid-token-punctuation: #1e1e1e;
+  --ttd-mermaid-token-variable-name: #001080;
+  --ttd-mermaid-token-bracket: #af00db;
+
  &.theme--dark {
+    --ttd-mermaid-token-keyword: #569cd6;
+    --ttd-mermaid-token-string: #ce9178;
+    --ttd-mermaid-token-comment: #6a9955;
+    --ttd-mermaid-token-number: #b5cea8;
+    --ttd-mermaid-token-operator: #d4d4d4;
+    --ttd-mermaid-token-punctuation: #d4d4d4;
+    --ttd-mermaid-token-variable-name: #9cdcfe;
+    --ttd-mermaid-token-bracket: #ffd700;
+
    .chat-message {
      &--assistant {
        .chat-message__content {
@@ -194,7 +212,7 @@ $verticalBreakpoint: 861px;
      align-items: flex-start;

      .chat-message__content {
-        background: var(--color-surface-low);
+        background: #f7f7f7;
        color: var(--color-on-surface);
        border-radius: var(--border-radius-md);
        min-width: 6rem;
@@ -292,6 +310,51 @@ $verticalBreakpoint: 861px;
      word-wrap: break-word;
    }

+    &__text--error {
+      color: inherit;
+    }
+
+    &__text--mermaid {
+      overflow-x: auto;
+      font-weight: 400;
+    }
+
+    &__token {
+      white-space: inherit;
+    }
+
+    &__token--keyword {
+      color: var(--ttd-mermaid-token-keyword);
+    }
+
+    &__token--string {
+      color: var(--ttd-mermaid-token-string);
+    }
+
+    &__token--comment {
+      color: var(--ttd-mermaid-token-comment);
+    }
+
+    &__token--number {
+      color: var(--ttd-mermaid-token-number);
+    }
+
+    &__token--operator {
+      color: var(--ttd-mermaid-token-operator);
+    }
+
+    &__token--punctuation {
+      color: var(--ttd-mermaid-token-punctuation);
+    }
+
+    &__token--variableName {
+      color: var(--ttd-mermaid-token-variable-name);
+    }
+
+    &__token--bracket {
+      color: var(--ttd-mermaid-token-bracket);
+    }
+
    &__cursor {
      display: inline-block;
      margin-left: 2px;
@@ -332,11 +395,13 @@ $verticalBreakpoint: 861px;
    &__error {
      color: var(--color-danger);
      font-weight: 500;
-      white-space: pre-wrap;
-      word-wrap: break-word;
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
+
+      .chat-message__text--mermaid {
+        color: var(--color-on-surface);
+      }
    }

    &__error_message {
@@ -5,8 +5,49 @@ import { t } from "../../../i18n";
 import { FilledButton } from "../../FilledButton";
 import { TrashIcon, codeIcon, stackPushIcon, RetryIcon } from "../../icons";

+import { tokenizeMermaid } from "../mermaid-highlighting";
+
 import type { TChat, TTTDDialog } from "../types";

+const isMermaidMessage = (message: TChat.ChatMessage) =>
+  message.contentFormat === "mermaid";
+
+const renderMessageContent = (
+  message: TChat.ChatMessage,
+  className: string,
+) => {
+  const content = message.content ?? "";
+
+  console.log("@", message);
+
+  if (!isMermaidMessage(message)) {
+    return (
+      <div className={className}>
+        {content}
+        {message.isGenerating && (
+          <span className="chat-message__cursor">▋</span>
+        )}
+      </div>
+    );
+  }
+
+  return (
+    <div className={clsx(className, "chat-message__text--mermaid")}>
+      {tokenizeMermaid(content).map((token, index) => (
+        <span
+          key={`${index}-${token.type ?? "text"}-${token.value}`}
+          className={clsx("chat-message__token", {
+            [`chat-message__token--${token.type}`]: token.type,
+          })}
+        >
+          {token.value}
+        </span>
+      ))}
+      {message.isGenerating && <span className="chat-message__cursor">▋</span>}
+    </div>
+  );
+};
+
 export const ChatMessage: React.FC<{
  message: TChat.ChatMessage;
  onMermaidTabClick?: (message: TChat.ChatMessage) => void;
@@ -122,7 +163,14 @@ export const ChatMessage: React.FC<{
        <div className="chat-message__body">
          {message.error ? (
            <>
-              <div className="chat-message__error">{message.content}</div>
+              <div className="chat-message__error">
+                {renderMessageContent(
+                  message,
+                  clsx("chat-message__text", {
+                    "chat-message__text--error": !isMermaidMessage(message),
+                  }),
+                )}
+              </div>
              {message.errorType !== "parse" && (
                <div className="chat-message__error_message">
                  Error: {message.error || t("chat.errors.generationFailed")}
@@ -132,7 +180,7 @@ export const ChatMessage: React.FC<{
                <div className="chat-message__error_message">
                  <p>{t("chat.errors.invalidDiagram")}</p>
                  <div className="chat-message__error-actions">
-                    {onMermaidTabClick && (
+                    {onMermaidTabClick && isMermaidMessage(message) && (
                      <button
                        className="chat-message__error-link"
                        onClick={() => onMermaidTabClick(message)}
@@ -156,18 +204,13 @@ export const ChatMessage: React.FC<{
              )}
            </>
          ) : (
-            <div className="chat-message__text">
-              {message.content}
-              {message.isGenerating && (
-                <span className="chat-message__cursor">▋</span>
-              )}
-            </div>
+            renderMessageContent(message, "chat-message__text")
          )}
        </div>
      </div>
      {message.type === "assistant" && !message.isGenerating && (
        <div className="chat-message__actions">
-          {!message.error && onInsertMessage && (
+          {!message.error && onInsertMessage && isMermaidMessage(message) && (
            <button
              className="chat-message__action"
              onClick={() => onInsertMessage(message)}
@@ -178,7 +221,7 @@ export const ChatMessage: React.FC<{
              {stackPushIcon}
            </button>
          )}
-          {onMermaidTabClick && message.content && (
+          {onMermaidTabClick && isMermaidMessage(message) && message.content && (
            <button
              className="chat-message__action"
              onClick={() => onMermaidTabClick(message)}
@@ -25,6 +25,7 @@ export const TTDChatPanel = ({
  onGenerate,
  isGenerating,
  generatedResponse,
+  generatedResponseFormat,
  isMenuOpen,
  onMenuToggle,
  onMenuClose,
@@ -50,6 +51,7 @@ export const TTDChatPanel = ({
  onGenerate: TTTDDialog.OnGenerate;
  isGenerating: boolean;
  generatedResponse: string | null | undefined;
+  generatedResponseFormat?: TChat.ChatMessage["contentFormat"];

  isMenuOpen: boolean;
  onMenuToggle: () => void;
@@ -89,7 +91,7 @@ export const TTDChatPanel = ({
      });
    }

-    if (generatedResponse) {
+    if (generatedResponse && generatedResponseFormat === "mermaid") {
      actions.push({
        action: onViewAsMermaid,
        label: t("chat.viewAsMermaid"),
@@ -25,6 +25,7 @@ export const useChatAgent = () => {
        {
          type: "assistant",
          content: "",
+          contentFormat: "mermaid",
          isGenerating: true,
        },
      ]),
@@ -1,13 +1,21 @@
 import { useEffect, useRef } from "react";
 import {
  Decoration,
+  type DecorationSet,
  EditorView,
+  ViewPlugin,
+  type ViewUpdate,
  keymap,
  lineNumbers,
  placeholder as cmPlaceholder,
  drawSelection,
 } from "@codemirror/view";
-import { Compartment, EditorState, type Extension } from "@codemirror/state";
+import {
+  Compartment,
+  EditorState,
+  type Extension,
+  type Range,
+} from "@codemirror/state";
 import {
  defaultKeymap,
  history,
@@ -40,6 +48,13 @@ const darkTheme = EditorView.theme(
    },
    ".cm-content": { caretColor: "#fff" },
    ".cm-cursor": { borderLeftColor: "#fff" },
+    ".cm-selectionBackground": {
+      backgroundColor: "rgba(86, 156, 214, 0.3)",
+    },
+    "&.cm-focused > .cm-scroller > .cm-selectionLayer .cm-selectionBackground":
+      {
+        backgroundColor: "rgba(86, 156, 214, 0.42)",
+      },
    ".cm-gutters": {
      backgroundColor: "#1e1e1e",
      color: "#858585",
@@ -48,6 +63,10 @@ const darkTheme = EditorView.theme(
    ".cm-activeLineGutter": { backgroundColor: "#2a2a2a" },
    ".cm-activeLine": { backgroundColor: "#2a2a2a" },
    ".cm-errorLine": { backgroundColor: "rgba(255, 0, 0, 0.15)" },
+    ".cm-selectedWordMatch": {
+      backgroundColor: "rgba(255, 209, 102, 0.22)",
+      borderRadius: "2px",
+    },
  },
  { dark: true },
 );
@@ -80,6 +99,10 @@ const lightTheme = EditorView.theme({
  ".cm-activeLineGutter": { backgroundColor: "#e8e8e8" },
  ".cm-activeLine": { backgroundColor: "#e8e8e8" },
  ".cm-errorLine": { backgroundColor: "rgba(255, 0, 0, 0.1)" },
+  ".cm-selectedWordMatch": {
+    backgroundColor: "rgba(255, 209, 102, 0.35)",
+    borderRadius: "2px",
+  },
 });

 const lightHighlight = HighlightStyle.define([
@@ -96,6 +119,79 @@ const lightHighlight = HighlightStyle.define([
 // ---- Error line decoration ----

 const errorLineDeco = Decoration.line({ class: "cm-errorLine" });
+const selectedWordMatchDeco = Decoration.mark({
+  class: "cm-selectedWordMatch",
+});
+
+const getSelectedWordMatchText = (state: EditorState) => {
+  const mainSelection = state.selection.main;
+  if (state.selection.ranges.length !== 1 || mainSelection.empty) {
+    return null;
+  }
+
+  const selectedWord = state.wordAt(mainSelection.from);
+  if (
+    !selectedWord ||
+    selectedWord.from !== mainSelection.from ||
+    selectedWord.to !== mainSelection.to
+  ) {
+    return null;
+  }
+
+  return state.sliceDoc(mainSelection.from, mainSelection.to);
+};
+
+const getSelectedWordMatchDecorations = (view: EditorView): DecorationSet => {
+  const selectedWord = getSelectedWordMatchText(view.state);
+  if (!selectedWord) {
+    return Decoration.none;
+  }
+
+  const selection = view.state.selection.main;
+  const ranges: Range<Decoration>[] = [];
+  const doc = view.state.doc.toString();
+  let searchFrom = 0;
+
+  while (searchFrom <= doc.length - selectedWord.length) {
+    const matchFrom = doc.indexOf(selectedWord, searchFrom);
+    if (matchFrom === -1) {
+      break;
+    }
+
+    const matchTo = matchFrom + selectedWord.length;
+    const matchWord = view.state.wordAt(matchFrom);
+    if (
+      matchWord?.from === matchFrom &&
+      matchWord.to === matchTo &&
+      (matchFrom !== selection.from || matchTo !== selection.to)
+    ) {
+      ranges.push(selectedWordMatchDeco.range(matchFrom, matchTo));
+    }
+
+    searchFrom = matchTo;
+  }
+
+  return ranges.length ? Decoration.set(ranges) : Decoration.none;
+};
+
+const selectedWordMatchExtension = ViewPlugin.fromClass(
+  class {
+    decorations: DecorationSet;
+
+    constructor(view: EditorView) {
+      this.decorations = getSelectedWordMatchDecorations(view);
+    }
+
+    update(update: ViewUpdate) {
+      if (update.docChanged || update.selectionSet) {
+        this.decorations = getSelectedWordMatchDecorations(update.view);
+      }
+    }
+  },
+  {
+    decorations: (value) => value.decorations,
+  },
+);

 const getErrorLineExtension = (
  errorLine: number | null | undefined,
@@ -172,6 +268,7 @@ const CodeMirrorEditor = ({
          errorLineCompartmentRef.current.of([]),
          mermaidLite(),
          drawSelection({ drawRangeCursor: true }),
+          selectedWordMatchExtension,
          ...(placeholder ? [cmPlaceholder(placeholder)] : []),
        ],
      }),
@@ -80,7 +80,10 @@ const TextToDiagramContent = ({
  } = useChatManagement({ persistenceAdapter });

  const onViewAsMermaid = () => {
-    if (typeof lastAssistantMessage?.content === "string") {
+    if (
+      lastAssistantMessage?.contentFormat === "mermaid" &&
+      typeof lastAssistantMessage.content === "string"
+    ) {
      saveMermaidDataToStorage(lastAssistantMessage.content);
      setAppState({
        openDialog: { name: "ttd", tab: "mermaid" },
@@ -206,6 +209,7 @@ const TextToDiagramContent = ({
        onGenerate={onGenerate}
        isGenerating={lastAssistantMessage?.isGenerating ?? false}
        generatedResponse={lastAssistantMessage?.content}
+        generatedResponseFormat={lastAssistantMessage?.contentFormat}
        isMenuOpen={isMenuOpen}
        onMenuToggle={handleMenuToggle}
        onMenuClose={handleMenuClose}
@@ -88,6 +88,7 @@ export const useTextGeneration = ({
        updateAssistantContent(prev, {
          isGenerating: true,
          content: "",
+          contentFormat: "mermaid",
          error: undefined,
          errorType: undefined,
          errorDetails: undefined,
@@ -0,0 +1,40 @@
+import {
+  getMermaidHighlightToken,
+  tokenizeMermaid,
+} from "./mermaid-highlighting";
+
+describe("mermaid highlighting", () => {
+  it("tokenizes mermaid syntax with shared token types", () => {
+    const tokens = tokenizeMermaid('flowchart LR\nA["Hello"] --> B');
+
+    expect(tokens).toEqual([
+      { type: "keyword", value: "flowchart" },
+      { type: null, value: " " },
+      { type: "keyword", value: "LR" },
+      { type: null, value: "\n" },
+      { type: "variableName", value: "A" },
+      { type: "bracket", value: "[" },
+      { type: "string", value: '"Hello"' },
+      { type: "bracket", value: "]" },
+      { type: null, value: " " },
+      { type: "operator", value: "-->" },
+      { type: null, value: " " },
+      { type: "variableName", value: "B" },
+    ]);
+  });
+
+  it("limits comment tokens to a single line", () => {
+    const tokens = tokenizeMermaid("%% comment\nflowchart TD");
+
+    expect(tokens[0]).toEqual({ type: "comment", value: "%% comment" });
+    expect(tokens[1]).toEqual({ type: null, value: "\n" });
+    expect(tokens[2]).toEqual({ type: "keyword", value: "flowchart" });
+  });
+
+  it("falls back to plain text for unsupported characters", () => {
+    expect(getMermaidHighlightToken("@node")).toEqual({
+      type: null,
+      value: "@",
+    });
+  });
+});
@@ -0,0 +1,79 @@
+export type MermaidHighlightTokenType =
+  | "bracket"
+  | "comment"
+  | "keyword"
+  | "number"
+  | "operator"
+  | "punctuation"
+  | "string"
+  | "variableName";
+
+export type MermaidHighlightToken = {
+  type: MermaidHighlightTokenType | null;
+  value: string;
+};
+
+const DIAGRAM_TYPE_PATTERN =
+  /^(flowchart|graph|sequenceDiagram|classDiagram|stateDiagram|erDiagram|gantt|pie|mindmap|journey|gitGraph|timeline|quadrantChart|sankey|xychart)\b/i;
+const DIRECTION_PATTERN = /^(TB|TD|BT|RL|LR)\b/;
+const KEYWORD_PATTERN =
+  /^(subgraph|end|participant|actor|loop|alt|else|opt|par|critical|break|rect|note|over|activate|deactivate|title|section|class|style|linkStyle|classDef|click)\b/i;
+
+const MERMAID_TOKEN_RULES: ReadonlyArray<{
+  pattern: RegExp;
+  type: MermaidHighlightTokenType | null;
+}> = [
+  { pattern: /^%%[^\n]*/, type: "comment" },
+  { pattern: /^"(?:[^"\\]|\\.)*"/, type: "string" },
+  { pattern: DIAGRAM_TYPE_PATTERN, type: "keyword" },
+  { pattern: DIRECTION_PATTERN, type: "keyword" },
+  { pattern: KEYWORD_PATTERN, type: "keyword" },
+  { pattern: /^[-.=<>|ox]+>/, type: "operator" },
+  { pattern: /^<[-.=<>|ox]+/, type: "operator" },
+  { pattern: /^(--+|\.\.+|==+)/, type: "operator" },
+  { pattern: /^[[\](){}|<>]/, type: "bracket" },
+  { pattern: /^[A-Za-z_][A-Za-z0-9_]*/, type: "variableName" },
+  { pattern: /^\d+(\.\d+)?/, type: "number" },
+  { pattern: /^[,:;]/, type: "punctuation" },
+  { pattern: /^\s+/, type: null },
+];
+
+export const getMermaidHighlightToken = (
+  input: string,
+): MermaidHighlightToken | null => {
+  if (!input) {
+    return null;
+  }
+
+  for (const rule of MERMAID_TOKEN_RULES) {
+    const match = input.match(rule.pattern);
+    if (match) {
+      return {
+        type: rule.type,
+        value: match[0],
+      };
+    }
+  }
+
+  return {
+    type: null,
+    value: input[0],
+  };
+};
+
+export const tokenizeMermaid = (input: string): MermaidHighlightToken[] => {
+  const tokens: MermaidHighlightToken[] = [];
+  let remaining = input;
+
+  while (remaining) {
+    const token = getMermaidHighlightToken(remaining);
+    if (!token) {
+      break;
+    }
+
+    tokens.push(token);
+    remaining = remaining.slice(token.value.length);
+  }
+
+  return tokens;
+};
@@ -1,79 +1,17 @@
 import { StreamLanguage } from "@codemirror/language";

+import { getMermaidHighlightToken } from "./mermaid-highlighting";
+
 const mermaidStreamParser = StreamLanguage.define({
  token(stream) {
-    // Comments: %%...
-    if (stream.match(/^%%.*$/)) {
-      return "comment";
-    }
-
-    // Strings
-    if (stream.match(/^"(?:[^"\\]|\\.)*"/)) {
-      return "string";
-    }
-
-    // Diagram type keywords (at start of line or after whitespace)
-    if (
-      stream.match(
-        /^(flowchart|graph|sequenceDiagram|classDiagram|stateDiagram|erDiagram|gantt|pie|mindmap|journey|gitGraph|timeline|quadrantChart|sankey|xychart)\b/i,
-      )
-    ) {
-      return "keyword";
-    }
-
-    // Direction keywords
-    if (stream.match(/^(TB|TD|BT|RL|LR)\b/)) {
-      return "keyword";
-    }
-
-    // Keywords
-    if (
-      stream.match(
-        /^(subgraph|end|participant|actor|loop|alt|else|opt|par|critical|break|rect|note|over|activate|deactivate|title|section|class|style|linkStyle|classDef|click)\b/i,
-      )
-    ) {
-      return "keyword";
-    }
-
-    // Arrows: -->, ---, -.->, ===>, etc.
-    if (stream.match(/^[-.=<>|ox]+>/)) {
-      return "operator";
-    }
-    if (stream.match(/^<[-.=<>|ox]+/)) {
-      return "operator";
-    }
-    if (stream.match(/^--+|\.\.+|==+/)) {
-      return "operator";
-    }
-
-    // Labels in brackets/parens: [text], (text), {text}, ((text)), etc.
-    if (stream.match(/^[[\](){}|<>]/)) {
-      return "bracket";
-    }
-
-    // Node IDs (alphanumeric)
-    if (stream.match(/^[A-Za-z_][A-Za-z0-9_]*/)) {
-      return "variableName";
-    }
-
-    // Numbers
-    if (stream.match(/^\d+(\.\d+)?/)) {
-      return "number";
-    }
-
-    // Punctuation
-    if (stream.match(/^[,:;]/)) {
-      return "punctuation";
-    }
-
-    // Skip whitespace
-    if (stream.eatSpace()) {
+    const token = getMermaidHighlightToken(stream.string.slice(stream.pos));
+    if (!token) {
+      stream.skipToEnd();
      return null;
    }

-    // Skip any other character
-    stream.next();
-    return null;
+    stream.pos += token.value.length;
+    return token.type;
  },
 });

@@ -18,6 +18,8 @@ export type MermaidData = {
  files: BinaryFiles | null;
 };

+export type ChatMessageContentFormat = "text" | "mermaid";
+
 export interface RateLimits {
  rateLimit: number;
  rateLimitRemaining: number;
@@ -33,6 +35,7 @@ export namespace TChat {
    errorType?: "parse" | "network" | "other";
    lastAttemptAt?: number;
    type: "user" | "assistant" | "warning";
+    contentFormat?: ChatMessageContentFormat;
    warningType?: /* daily rate limit */
    "messageLimitExceeded" | /* general 429 */ "rateLimitExceeded";
    content?: string;
@@ -7,6 +7,17 @@ import { chatHistoryAtom } from "./TTDContext";

 import type { SavedChat, SavedChats, TTDPersistenceAdapter } from "./types";

+const normalizePersistedChat = (chat: SavedChat): SavedChat => ({
+  ...chat,
+  messages: chat.messages.map((message) => ({
+    ...message,
+    // Legacy TTD chats predate explicit content format metadata.
+    contentFormat:
+      message.contentFormat ??
+      (message.type === "assistant" ? "mermaid" : undefined),
+  })),
+});
+
 interface UseTTDChatStorageProps {
  persistenceAdapter: TTDPersistenceAdapter;
 }
@@ -56,7 +67,7 @@ export const useTTDChatStorage = ({
    setIsLoading(true);
    try {
      const chats = await persistenceAdapter.loadChats();
-      setSavedChats(chats);
+      setSavedChats(chats.map(normalizePersistedChat));
      setChatsLoaded(true);
    } catch (error) {
      console.warn("Failed to load chats:", error);
@@ -117,6 +117,28 @@ describe("chat utils", () => {
      expect(result.messages[0].errorType).toBe("network");
    });

+    it("should update content format when provided", () => {
+      const chatHistory: TChat.ChatHistory = {
+        id: "chat-1",
+        currentPrompt: "",
+        messages: [
+          {
+            id: "1",
+            type: "assistant",
+            content: "graph TD",
+            timestamp: new Date("2024-01-01"),
+            contentFormat: "text",
+          },
+        ],
+      };
+
+      const result = updateAssistantContent(chatHistory, {
+        contentFormat: "mermaid",
+      });
+
+      expect(result.messages[0].contentFormat).toBe("mermaid");
+    });
+
    it("should return unchanged chatHistory if no assistant message exists", () => {
      const chatHistory: TChat.ChatHistory = {
        id: "chat-1",
@@ -357,6 +379,7 @@ describe("chat utils", () => {
        {
          type: "assistant",
          content: "Message",
+          contentFormat: "mermaid",
          isGenerating: true,
          error: "Error text",
          errorType: "parse",
@@ -364,6 +387,7 @@ describe("chat utils", () => {
      ]);

      expect(result.messages[0].isGenerating).toBe(true);
+      expect(result.messages[0].contentFormat).toBe("mermaid");
      expect(result.messages[0].error).toBe("Error text");
      expect(result.messages[0].errorType).toBe("parse");
    });
@@ -39,7 +39,7 @@ type InteractiveCanvasProps = {
  visibleElements: readonly NonDeletedExcalidrawElement[];
  selectedElements: readonly NonDeletedExcalidrawElement[];
  allElementsMap: NonDeletedSceneElementsMap;
-  canvasNonce: string;
+  sceneNonce: number | undefined;
  selectionNonce: number | undefined;
  scale: number;
  appState: InteractiveCanvasAppState;
@@ -279,10 +279,10 @@ const areEqual = (
  // This could be further optimised if needed, as we don't have to render interactive canvas on each scene mutation
  if (
    prevProps.selectionNonce !== nextProps.selectionNonce ||
-    prevProps.canvasNonce !== nextProps.canvasNonce ||
+    prevProps.sceneNonce !== nextProps.sceneNonce ||
    prevProps.scale !== nextProps.scale ||
    // we need to memoize on elementsMap because they may have renewed
-    // even if canvasNonce didn't change (e.g. we filter elements out based
+    // even if sceneNonce didn't change (e.g. we filter elements out based
    // on appState)
    prevProps.elementsMap !== nextProps.elementsMap ||
    prevProps.visibleElements !== nextProps.visibleElements ||
@@ -14,7 +14,6 @@ import type { RoughCanvas } from "roughjs/bin/canvas";

 interface NewElementCanvasProps {
  appState: AppState;
-  newElement: NonNullable<AppState["newElement"]>;
  elementsMap: RenderableElementsMap;
  allElementsMap: NonDeletedSceneElementsMap;
  scale: number;
@@ -32,7 +31,7 @@ const NewElementCanvas = (props: NewElementCanvasProps) => {
      {
        canvas: canvasRef.current,
        scale: props.scale,
-        newElement: props.newElement,
+        newElement: props.appState.newElement,
        elementsMap: props.elementsMap,
        allElementsMap: props.allElementsMap,
        rc: props.rc,
@@ -23,7 +23,7 @@ type StaticCanvasProps = {
  elementsMap: RenderableElementsMap;
  allElementsMap: NonDeletedSceneElementsMap;
  visibleElements: readonly NonDeletedExcalidrawElement[];
-  canvasNonce: string;
+  sceneNonce: number | undefined;
  selectionNonce: number | undefined;
  scale: number;
  appState: StaticCanvasAppState;
@@ -110,10 +110,10 @@ const areEqual = (
  nextProps: StaticCanvasProps,
 ) => {
  if (
-    prevProps.canvasNonce !== nextProps.canvasNonce ||
+    prevProps.sceneNonce !== nextProps.sceneNonce ||
    prevProps.scale !== nextProps.scale ||
    // we need to memoize on elementsMap because they may have renewed
-    // even if canvasNonce didn't change (e.g. we filter elements out based
+    // even if sceneNonce didn't change (e.g. we filter elements out based
    // on appState)
    prevProps.elementsMap !== nextProps.elementsMap ||
    prevProps.visibleElements !== nextProps.visibleElements
@@ -2,7 +2,7 @@

 .excalidraw {
  .dropdown-menu {
-    max-width: 20rem;
+    max-width: 16rem;
    z-index: 1;

    &--placement-top {
@@ -1,5 +1,4 @@
 import { useEditorInterface } from "../App";
-import { Ellipsify } from "../Ellipsify";
 import { RadioGroup } from "../RadioGroup";

 type Props<T> = {
@@ -13,7 +12,6 @@ type Props<T> = {
  onChange: (value: T) => void;
  children: React.ReactNode;
  name: string;
-  icon?: React.ReactNode;
 };

 const DropdownMenuItemContentRadio = <T,>({
@@ -23,17 +21,13 @@ const DropdownMenuItemContentRadio = <T,>({
  choices,
  children,
  name,
-  icon,
 }: Props<T>) => {
  const editorInterface = useEditorInterface();

  return (
    <>
      <div className="dropdown-menu-item-base dropdown-menu-item-bare">
-        {icon && <div className="dropdown-menu-item__icon">{icon}</div>}
-        <label className="dropdown-menu-item__text">
-          <Ellipsify>{children}</Ellipsify>
-        </label>
+        <label className="dropdown-menu-item__text">{children}</label>
        <RadioGroup
          name={name}
          value={value}
@@ -39,13 +39,7 @@ import DropdownMenuItemCheckbox from "../dropdownMenu/DropdownMenuItemCheckbox";
 import DropdownMenuItemContentRadio from "../dropdownMenu/DropdownMenuItemContentRadio";
 import DropdownMenuItemLink from "../dropdownMenu/DropdownMenuItemLink";
 import DropdownMenuSub from "../dropdownMenu/DropdownMenuSub";
-import {
-  GithubIcon,
-  DiscordIcon,
-  XBrandIcon,
-  settingsIcon,
-  emptyIcon,
-} from "../icons";
+import { GithubIcon, DiscordIcon, XBrandIcon, settingsIcon } from "../icons";
 import {
  boltIcon,
  DeviceDesktopIcon,
@@ -232,22 +226,18 @@ export const ToggleTheme = (
  props:
    | {
        allowSystemTheme: true;
-        /**
-         * Controls the theme of this UI component only.
-         * You should subscribe to `props.onThemeChange` and control the theme
-         * upstream.
-         */
        theme: Theme | "system";
+        onSelect: (theme: Theme | "system") => void;
      }
    | {
-        allowSystemTheme: false;
+        allowSystemTheme?: false;
+        onSelect?: (theme: Theme) => void;
      },
 ) => {
  const { t } = useI18n();
  const appState = useUIAppState();
  const actionManager = useExcalidrawActionManager();
  const shortcut = getShortcutFromShortcutName("toggleTheme");
-  const appProps = useAppProps();

  if (!actionManager.isActionEnabled(actionToggleTheme)) {
    return null;
@@ -258,16 +248,7 @@ export const ToggleTheme = (
      <DropdownMenuItemContentRadio
        name="theme"
        value={props.theme}
-        onChange={(value: Theme | "system") => {
-          if (appProps.onThemeChange) {
-            appProps.onThemeChange(value);
-            return;
-          }
-
-          console.warn(
-            "MainMenu.DefaultItems.ToggleTheme: `<Excalidraw/> props.onThemeChange` must be defined to use system theme selection.",
-          );
-        }}
+        onChange={(value: Theme | "system") => props.onSelect(value)}
        choices={[
          {
            value: THEME.LIGHT,
@@ -297,7 +278,13 @@ export const ToggleTheme = (
        // do not close the menu when changing theme
        event.preventDefault();

-        actionManager.executeAction(actionToggleTheme);
+        if (props?.onSelect) {
+          props.onSelect(
+            appState.theme === THEME.DARK ? THEME.LIGHT : THEME.DARK,
+          );
+        } else {
+          return actionManager.executeAction(actionToggleTheme);
+        }
      }}
      icon={appState.theme === THEME.DARK ? SunIcon : MoonIcon}
      data-testid="toggle-dark-mode"
@@ -440,39 +427,6 @@ const PreferencesToggleToolLockItem = () => {
  );
 };

-const PreferencesBoxSelectionModeItem = () => {
-  const { t } = useI18n();
-  const appState = useUIAppState();
-  const setAppState = useExcalidrawSetAppState();
-
-  return (
-    <DropdownMenuItemContentRadio<"contain" | "overlap">
-      name="boxSelectionMode"
-      icon={emptyIcon}
-      value={appState.boxSelectionMode}
-      onChange={(value) => {
-        setAppState({
-          boxSelectionMode: value,
-        });
-      }}
-      choices={[
-        {
-          value: "contain",
-          label: t("labels.boxSelectionContain"),
-          ariaLabel: t("labels.boxSelectionContain"),
-        },
-        {
-          value: "overlap",
-          label: t("labels.boxSelectionOverlap"),
-          ariaLabel: t("labels.boxSelectionOverlap"),
-        },
-      ]}
-    >
-      {t("labels.boxSelectionMode")}
-    </DropdownMenuItemContentRadio>
-  );
-};
-
 const PreferencesToggleSnapModeItem = () => {
  const { t } = useI18n();
  const actionManager = useExcalidrawActionManager();
@@ -614,7 +568,6 @@ export const Preferences = ({
      <DropdownMenuSub.Content className="excalidraw-main-menu-preferences-submenu">
        {children || (
          <>
-            <PreferencesBoxSelectionModeItem />
            <PreferencesToggleToolLockItem />
            <PreferencesToggleSnapModeItem />
            <PreferencesToggleGridModeItem />
@@ -632,7 +585,6 @@ export const Preferences = ({
 };

 Preferences.ToggleToolLock = PreferencesToggleToolLockItem;
-Preferences.BoxSelectionMode = PreferencesBoxSelectionModeItem;
 Preferences.ToggleSnapMode = PreferencesToggleSnapModeItem;
 Preferences.ToggleArrowBinding = PreferencesToggleArrowBindingItem;
 Preferences.ToggleMidpointSnapping = PreferencesToggleMidpointSnappingItem;
@@ -119,12 +119,15 @@ export const SHAPES = [
 export const getToolbarTools = (app: AppClassProperties) => {
  return app.state.preferredSelectionTool.type === "lasso"
    ? ([
-        SHAPES[0],
        {
-          ...SHAPES[1],
          value: "lasso",
+          icon: SelectionIcon,
+          key: KEYS.V,
+          numericKey: KEYS["1"],
+          fillable: true,
+          toolbar: true,
        },
-        ...SHAPES.slice(2),
+        ...SHAPES.slice(1),
      ] as const)
    : SHAPES;
 };
@@ -814,14 +814,6 @@ body.excalidraw-cursor-resize * {
  .excalidraw__embeddable__outer {
    width: 100%;
    height: 100%;
-  }
-
-  .excalidraw__embeddable__content {
-    width: 100%;
-    height: 100%;
-    transform-origin: top left;
-
-    &,
    & > * {
      border-radius: var(--embeddable-radius);
    }
@@ -311,48 +311,6 @@ export const dataURLToString = (dataURL: DataURL) => {
  return base64ToString(dataURL.slice(dataURL.indexOf(",") + 1));
 };

-const getImageFileDimensions = async (file: File) => {
-  const browserURL = typeof window !== "undefined" ? window.URL : undefined;
-  let objectURL: string | null = null;
-  let imageSource: string;
-
-  try {
-    imageSource = browserURL?.createObjectURL
-      ? (objectURL = browserURL.createObjectURL(file))
-      : await getDataURL(file);
-  } catch {
-    objectURL = null;
-    imageSource = await getDataURL(file);
-  }
-
-  return new Promise<{ width: number; height: number }>((resolve, reject) => {
-    const image = new Image();
-
-    const cleanup = () => {
-      image.onload = null;
-      image.onerror = null;
-
-      if (objectURL && browserURL?.revokeObjectURL) {
-        browserURL.revokeObjectURL(objectURL);
-      }
-    };
-
-    image.onload = () => {
-      cleanup();
-      resolve({
-        width: image.naturalWidth || image.width,
-        height: image.naturalHeight || image.height,
-      });
-    };
-    image.onerror = (error) => {
-      cleanup();
-      reject(error);
-    };
-
-    image.src = imageSource;
-  });
-};
-
 export const resizeImageFile = async (
  file: File,
  opts: {
@@ -366,20 +324,6 @@ export const resizeImageFile = async (
    return file;
  }

-  if (!isSupportedImageFile(file)) {
-    throw new Error("Error: unsupported file type", { cause: "UNSUPPORTED" });
-  }
-
-  if (!opts.outputType || opts.outputType === file.type) {
-    const dimensions = await getImageFileDimensions(file);
-
-    if (
-      Math.max(dimensions.width, dimensions.height) <= opts.maxWidthOrHeight
-    ) {
-      return file;
-    }
-  }
-
  const [pica, imageBlobReduce] = await Promise.all([
    import("pica").then((res) => res.default),
    // a wrapper for pica for better API
@@ -403,6 +347,10 @@ export const resizeImageFile = async (
    };
  }

+  if (!isSupportedImageFile(file)) {
+    throw new Error("Error: unsupported file type", { cause: "UNSUPPORTED" });
+  }
+
  return new File(
    [await reduce.toBlob(file, { max: opts.maxWidthOrHeight, alpha: true })],
    file.name,
@@ -6,7 +6,6 @@ import {
  MIME_TYPES,
  cloneJSON,
  SVG_DOCUMENT_PREAMBLE,
-  arrayToMap,
 } from "@excalidraw/common";

 import { getNonDeletedElements } from "@excalidraw/element";
@@ -50,7 +49,6 @@ export const prepareElementsForExport = (
  exportSelectionOnly: boolean,
 ) => {
  elements = getNonDeletedElements(elements);
-  const elementsMap = arrayToMap(elements);

  const isExportingSelection =
    exportSelectionOnly &&
@@ -73,11 +71,7 @@ export const prepareElementsForExport = (
      isFrameLikeElement(exportedElements[0])
    ) {
      exportingFrame = exportedElements[0];
-      exportedElements = getElementsOverlappingFrame(
-        elements,
-        exportingFrame,
-        elementsMap,
-      );
+      exportedElements = getElementsOverlappingFrame(elements, exportingFrame);
    } else if (exportedElements.length > 1) {
      exportedElements = getSelectedElements(
        elements,
@@ -1,4 +1,4 @@
-import { isFiniteNumber, isValidPoint, pointFrom } from "@excalidraw/math";
+import { isFiniteNumber, pointFrom } from "@excalidraw/math";

 import {
  type CombineBrandsIfNeeded,
@@ -54,11 +54,6 @@ import { getNormalizedDimensions } from "@excalidraw/element";

 import { isInvisiblySmallElement } from "@excalidraw/element";

-import {
-  elementOverlapsWithFrame,
-  isFrameLikeElement,
-} from "@excalidraw/element";
-
 import type { LocalPoint, Radians } from "@excalidraw/math";

 import type {
@@ -101,69 +96,6 @@ type RestoredAppState = Omit<
  "offsetTop" | "offsetLeft" | "width" | "height"
 >;

-const MAX_ARROW_PX = 75_000;
-
-const restoreLinearElementPoints = (
-  points: unknown,
-  width: unknown,
-  height: unknown,
-): LocalPoint[] => {
-  const restoredPoints = Array.isArray(points)
-    ? points.reduce<LocalPoint[]>((acc, point) => {
-        if (isValidPoint(point)) {
-          acc.push(pointFrom<LocalPoint>(point[0], point[1]));
-        }
-        return acc;
-      }, [])
-    : [];
-
-  return restoredPoints.length < 2
-    ? [
-        pointFrom<LocalPoint>(0, 0),
-        pointFrom<LocalPoint>(
-          isFiniteNumber(width) ? width : 0,
-          isFiniteNumber(height) ? height : 0,
-        ),
-      ]
-    : restoredPoints;
-};
-
-const restoreFreedrawPoints = (
-  points: unknown,
-  pressures: unknown,
-): {
-  points: LocalPoint[];
-  pressures: number[];
-} => {
-  if (!Array.isArray(points)) {
-    return {
-      points: [],
-      pressures: [],
-    };
-  }
-
-  const pressureValues: readonly unknown[] = Array.isArray(pressures)
-    ? pressures
-    : [];
-  const restoredPoints: LocalPoint[] = [];
-  const restoredPressures: number[] = [];
-
-  points.forEach((point, index) => {
-    if (isValidPoint(point)) {
-      restoredPoints.push(pointFrom<LocalPoint>(point[0], point[1]));
-      if (index in pressureValues) {
-        const pressure = pressureValues[index];
-        restoredPressures.push(isFiniteNumber(pressure) ? pressure : 0.5);
-      }
-    }
-  });
-
-  return {
-    points: restoredPoints,
-    pressures: restoredPressures,
-  };
-};
-
 export const AllowedExcalidrawActiveTools: Record<
  AppState["activeTool"]["type"],
  boolean
@@ -480,15 +412,10 @@ export const restoreElement = (

      return element;
    case "freedraw": {
-      const { points, pressures } = restoreFreedrawPoints(
-        element.points,
-        element.pressures,
-      );
-
      return restoreElementWithProperties(element, {
-        points,
+        points: element.points,
        simulatePressure: element.simulatePressure,
-        pressures,
+        pressures: element.pressures,
      });
    }
    case "image":
@@ -506,20 +433,14 @@ export const restoreElement = (
      const endArrowhead = normalizeArrowhead(element.endArrowhead);
      let x = element.x;
      let y = element.y;
-      let points = restoreLinearElementPoints(
-        element.points,
-        element.width,
-        element.height,
-      );
+      let points = // migrate old arrow model to new one
+        !Array.isArray(element.points) || element.points.length < 2
+          ? [pointFrom(0, 0), pointFrom(element.width, element.height)]
+          : element.points;

      if (points[0][0] !== 0 || points[0][1] !== 0) {
        ({ points, x, y } =
-          LinearElementEditor.getNormalizeElementPointsAndCoords({
-            ...element,
-            points,
-            x: x ?? 0,
-            y: y ?? 0,
-          } as ExcalidrawLinearElement));
+          LinearElementEditor.getNormalizeElementPointsAndCoords(element));
      }

      return restoreElementWithProperties(element, {
@@ -533,7 +454,7 @@ export const restoreElement = (
        y,
        ...(isLineElement(element)
          ? {
-              polygon: isValidPolygon(points)
+              polygon: isValidPolygon(element.points)
                ? element.polygon ?? false
                : false,
            }
@@ -546,31 +467,24 @@ export const restoreElement = (
        element.endArrowhead === undefined
          ? "arrow"
          : normalizeArrowhead(element.endArrowhead);
-      const x = element.x as number | undefined;
-      const y = element.y as number | undefined;
-      const points = restoreLinearElementPoints(
-        element.points,
-        element.width,
-        element.height,
-      );
-      const elementWithRestoredPoints = {
-        ...element,
-        points,
-        x: x ?? 0,
-        y: y ?? 0,
-      } as ExcalidrawArrowElement;
+      const x: number | undefined = element.x;
+      const y: number | undefined = element.y;
+      const points: readonly LocalPoint[] | undefined = // migrate old arrow model to new one
+        !Array.isArray(element.points) || element.points.length < 2
+          ? [pointFrom(0, 0), pointFrom(element.width, element.height)]
+          : element.points;

      const base = {
        type: element.type,
        startBinding: repairBinding(
-          elementWithRestoredPoints,
+          element as ExcalidrawArrowElement,
          element.startBinding,
          targetElementsMap,
          existingElementsMap,
          "start",
        ),
        endBinding: repairBinding(
-          elementWithRestoredPoints,
+          element as ExcalidrawArrowElement,
          element.endBinding,
          targetElementsMap,
          existingElementsMap,
@@ -579,8 +493,8 @@ export const restoreElement = (
        startArrowhead,
        endArrowhead,
        points,
-        x: x ?? 0,
-        y: y ?? 0,
+        x,
+        y,
        elbowed: (element as ExcalidrawArrowElement).elbowed,
        ...getSizeFromPoints(points),
      };
@@ -599,44 +513,12 @@ export const restoreElement = (
          })
        : restoreElementWithProperties(element as ExcalidrawArrowElement, base);

-      const normalizedRestoredElement = {
+      return {
        ...restoredElement,
        ...LinearElementEditor.getNormalizeElementPointsAndCoords(
          restoredElement,
        ),
      };
-
-      // Last resort fix for extremely large arrows
-      if (
-        normalizedRestoredElement.width > MAX_ARROW_PX ||
-        normalizedRestoredElement.height > MAX_ARROW_PX
-      ) {
-        console.error(
-          `Removing extremely large arrow ${
-            normalizedRestoredElement.id
-          } (type: ${
-            isElbowArrow(normalizedRestoredElement) ? "elbow" : "simple"
-          }, width: ${normalizedRestoredElement.width}, height: ${
-            normalizedRestoredElement.height
-          }, x: ${normalizedRestoredElement.x}, y: ${
-            normalizedRestoredElement.y
-          })`,
-        );
-        return {
-          ...normalizedRestoredElement,
-          x: 0,
-          y: 0,
-          width: 100,
-          height: 100,
-          points: [
-            pointFrom<LocalPoint>(0, 0),
-            pointFrom<LocalPoint>(100, 100),
-          ],
-          isDeleted: true,
-        };
-      }
-
-      return normalizedRestoredElement;
    }

    // generic elements
@@ -749,78 +631,20 @@ const repairBoundElement = (
 };

 /**
- * Remove an element's frameId if:
- *  - its containing frame is non-existent (or isn't actually a frame), or
- *  - the element no longer (precisely) overlaps its containing frame.
- *
- * Frame membership is treated atomically per group: a grouped element keeps its
- * frameId as long as ANY element of its (outermost) group still overlaps the
- * frame, so we never split a group across frame membership. Bound text inherits
- * its container's geometry/membership.
+ * Remove an element's frameId if its containing frame is non-existent
 *
 * NOTE mutates elements.
 */
 const repairFrameMembership = (
  element: Mutable<ExcalidrawElement>,
  elementsMap: Map<string, Mutable<ExcalidrawElement>>,
-  /** elements bucketed by outermost groupId (see `restoreElements`) */
-  elementsByGroup: Map<string, Mutable<ExcalidrawElement>[]>,
-  /** memoizes the overlap decision per `${frameId}:${groupId}` */
-  checkedFrameGroups: Map<string, boolean>,
 ) => {
-  if (!element.frameId) {
-    return;
-  }
+  if (element.frameId) {
+    const containingFrame = elementsMap.get(element.frameId);

-  const containingFrame = elementsMap.get(element.frameId);
-
-  // frame no longer exists (or the frameId doesn't point to a frame)
-  if (!containingFrame || !isFrameLikeElement(containingFrame)) {
-    element.frameId = null;
-    return;
-  }
-
-  // don't recompute geometry for deleted elements
-  if (element.isDeleted) {
-    return;
-  }
-
-  // a bound text follows its container's geometry / membership
-  const geometryElement =
-    isTextElement(element) && element.containerId
-      ? elementsMap.get(element.containerId) ?? element
-      : element;
-
-  const outerGroupId =
-    geometryElement.groupIds[geometryElement.groupIds.length - 1];
-
-  let overlapsFrame: boolean;
-  if (outerGroupId) {
-    const cacheKey = `${containingFrame.id}:${outerGroupId}`;
-    const cached = checkedFrameGroups.get(cacheKey);
-    if (cached !== undefined) {
-      overlapsFrame = cached;
-    } else {
-      // group membership is atomic — keep the element as long as ANY element
-      // of its group still overlaps the frame, so we never split a group.
-      const groupElements = elementsByGroup.get(outerGroupId) ?? [
-        geometryElement,
-      ];
-      overlapsFrame = groupElements.some((groupElement) =>
-        elementOverlapsWithFrame(groupElement, containingFrame, elementsMap),
-      );
-      checkedFrameGroups.set(cacheKey, overlapsFrame);
+    if (!containingFrame) {
+      element.frameId = null;
    }
-  } else {
-    overlapsFrame = elementOverlapsWithFrame(
-      geometryElement,
-      containingFrame,
-      elementsMap,
-    );
-  }
-
-  if (!overlapsFrame) {
-    element.frameId = null;
  }
 };

@@ -842,7 +666,6 @@ export const restoreElements = <T extends ExcalidrawElement>(
  const existingElementsMap = existingElements
    ? arrayToMap(existingElements)
    : null;
-
  const restoredElements = syncInvalidIndices(
    (targetElements || []).reduce((elements, element) => {
      // filtering out selection, which is legacy, no longer kept in elements,
@@ -899,32 +722,9 @@ export const restoreElements = <T extends ExcalidrawElement>(

  // repair binding. Mutates elements.
  const restoredElementsMap = arrayToMap(restoredElements);
-
-  // index elements by their outermost groupId once, so frame-membership repair
-  // can resolve a group's members in O(1) instead of scanning all elements per
-  // group (getElementsInGroup) — a big win on large, heavily-grouped scenes.
-  const elementsByGroup = new Map<string, Mutable<ExcalidrawElement>[]>();
-  for (const element of restoredElements) {
-    const outerGroupId = element.groupIds[element.groupIds.length - 1];
-    if (outerGroupId) {
-      const members = elementsByGroup.get(outerGroupId);
-      if (members) {
-        members.push(element);
-      } else {
-        elementsByGroup.set(outerGroupId, [element]);
-      }
-    }
-  }
-
-  const checkedFrameGroups = new Map<string, boolean>();
  for (const element of restoredElements) {
    if (element.frameId) {
-      repairFrameMembership(
-        element,
-        restoredElementsMap,
-        elementsByGroup,
-        checkedFrameGroups,
-      );
+      repairFrameMembership(element, restoredElementsMap);
    }

    if (isTextElement(element) && element.containerId) {
@@ -962,7 +762,7 @@ export const restoreElements = <T extends ExcalidrawElement>(
    }
  }

-  // NOTE (mtolmacs): Temporary fix for invalid/self-bound elbow arrows
+  // NOTE (mtolmacs): Temporary fix for extremely large arrows
  // Need to iterate again so we have attached text nodes in elementsMap
  return restoredElements.map((element) => {
    if (
@@ -1136,12 +936,6 @@ export const restoreAppState = (
        : defaultValue;
  }

-  const boxSelectionMode =
-    appState.boxSelectionMode ?? localAppState?.boxSelectionMode;
-  if (boxSelectionMode !== undefined) {
-    nextAppState.boxSelectionMode = boxSelectionMode;
-  }
-
  return {
    ...nextAppState,
    cursorButton: localAppState?.cursorButton || "up",
@@ -33,7 +33,9 @@ import type { Bounds } from "@excalidraw/common";
 import type { GlobalPoint, LineSegment } from "@excalidraw/math/types";
 import type { ElementsMap, ExcalidrawElement } from "@excalidraw/element/types";

-import { AnimatedTrail } from "../animatedTrail";
+import { AnimatedTrail } from "../animated-trail";
+
+import type { AnimationFrameHandler } from "../animation-frame-handler";

 import type App from "../components/App";

@@ -41,8 +43,8 @@ export class EraserTrail extends AnimatedTrail {
  private elementsToErase: Set<ExcalidrawElement["id"]> = new Set();
  private groupsToErase: Set<ExcalidrawElement["id"]> = new Set();

-  constructor(app: App) {
-    super(app, {
+  constructor(animationFrameHandler: AnimationFrameHandler, app: App) {
+    super(animationFrameHandler, app, {
      streamline: 0.2,
      size: 5,
      keepHead: true,
@@ -6,12 +6,7 @@ import React, {
  useState,
 } from "react";

-import {
-  applyDarkModeFilter,
-  DEFAULT_IMAGE_OPTIONS,
-  DEFAULT_UI_OPTIONS,
-  isShallowEqual,
-} from "@excalidraw/common";
+import { DEFAULT_UI_OPTIONS, isShallowEqual } from "@excalidraw/common";

 import App, {
  ExcalidrawAPIContext,
@@ -67,7 +62,6 @@ const ExcalidrawBase = (props: ExcalidrawProps) => {
  const {
    onExport,
    onChange,
-    onThemeChange,
    onIncrement,
    initialData,
    onExcalidrawAPI,
@@ -104,7 +98,6 @@ const ExcalidrawBase = (props: ExcalidrawProps) => {
    aiEnabled,
    showDeprecatedFonts,
    renderScrollbars,
-    imageOptions,
  } = props;

  const canvasActions = props.UIOptions?.canvasActions;
@@ -130,18 +123,11 @@ const ExcalidrawBase = (props: ExcalidrawProps) => {

  if (
    UIOptions.canvasActions.toggleTheme === null &&
-    (theme == null || onThemeChange)
+    typeof theme === "undefined"
  ) {
    UIOptions.canvasActions.toggleTheme = true;
  }

-  const normalizedImageOptions: AppProps["imageOptions"] = {
-    maxFileSizeBytes:
-      imageOptions?.maxFileSizeBytes ?? DEFAULT_IMAGE_OPTIONS.maxFileSizeBytes,
-    maxWidthOrHeight:
-      imageOptions?.maxWidthOrHeight ?? DEFAULT_IMAGE_OPTIONS.maxWidthOrHeight,
-  };
-
  const setExcalidrawAPI = useContext(ExcalidrawAPISetContext);

  const onExcalidrawAPIRef = useRef(onExcalidrawAPI);
@@ -186,7 +172,6 @@ const ExcalidrawBase = (props: ExcalidrawProps) => {
        <App
          onExport={onExport}
          onChange={onChange}
-          onThemeChange={onThemeChange}
          onIncrement={onIncrement}
          initialData={initialData}
          onExcalidrawAPI={handleExcalidrawAPI}
@@ -223,7 +208,6 @@ const ExcalidrawBase = (props: ExcalidrawProps) => {
          aiEnabled={aiEnabled !== false}
          showDeprecatedFonts={showDeprecatedFonts}
          renderScrollbars={renderScrollbars}
-          imageOptions={normalizedImageOptions}
        >
          {children}
        </App>
@@ -241,13 +225,11 @@ const areEqual = (prevProps: ExcalidrawProps, nextProps: ExcalidrawProps) => {
  const {
    initialData: prevInitialData,
    UIOptions: prevUIOptions = {},
-    imageOptions: prevImageOptions,
    ...prev
  } = prevProps;
  const {
    initialData: nextInitialData,
    UIOptions: nextUIOptions = {},
-    imageOptions: nextImageOptions,
    ...next
  } = nextProps;

@@ -291,17 +273,7 @@ const areEqual = (prevProps: ExcalidrawProps, nextProps: ExcalidrawProps) => {
    return prevUIOptions[key] === nextUIOptions[key];
  });

-  const isImageOptionsSame =
-    (prevImageOptions?.maxWidthOrHeight ??
-      DEFAULT_IMAGE_OPTIONS.maxWidthOrHeight) ===
-      (nextImageOptions?.maxWidthOrHeight ??
-        DEFAULT_IMAGE_OPTIONS.maxWidthOrHeight) &&
-    (prevImageOptions?.maxFileSizeBytes ??
-      DEFAULT_IMAGE_OPTIONS.maxFileSizeBytes) ===
-      (nextImageOptions?.maxFileSizeBytes ??
-        DEFAULT_IMAGE_OPTIONS.maxFileSizeBytes);
-
-  return isUIOptionsSame && isImageOptionsSame && isShallowEqual(prev, next);
+  return isUIOptionsSame && isShallowEqual(prev, next);
 };

 export const Excalidraw = React.memo(ExcalidrawBase, areEqual);
@@ -400,7 +372,11 @@ export {
  convertToExcalidrawElements,
 } from "@excalidraw/element";

-export { elementsOverlappingBBox } from "@excalidraw/element";
+export {
+  elementsOverlappingBBox,
+  isElementInsideBBox,
+  elementPartiallyOverlapsWithOrContainsBBox,
+} from "@excalidraw/utils/withinBounds";

 export { DiagramToCodePlugin } from "./components/DiagramToCodePlugin/DiagramToCodePlugin";
 export { getDataURL } from "./data/blob";
@@ -449,5 +425,3 @@ export function useExcalidrawStateValue(
 // -----------------------------------------------------------------------------

 export { _useOnAppStateChange as useOnExcalidrawStateChange };
-
-export { applyDarkModeFilter };
@@ -2,20 +2,27 @@ import { DEFAULT_LASER_COLOR, easeOut } from "@excalidraw/common";

 import type { LaserPointerOptions } from "@excalidraw/laser-pointer";

-import { AnimatedTrail } from "./animatedTrail";
+import { AnimatedTrail } from "./animated-trail";
 import { getClientColor } from "./clients";

-import type { Trail } from "./animatedTrail";
+import type { Trail } from "./animated-trail";
+import type { AnimationFrameHandler } from "./animation-frame-handler";
 import type App from "./components/App";
 import type { SocketId } from "./types";

 export class LaserTrails implements Trail {
  public localTrail: AnimatedTrail;
  private collabTrails = new Map<SocketId, AnimatedTrail>();
+
  private container?: SVGSVGElement;

-  constructor(private app: App) {
-    this.localTrail = new AnimatedTrail(app, {
+  constructor(
+    private animationFrameHandler: AnimationFrameHandler,
+    private app: App,
+  ) {
+    this.animationFrameHandler.register(this, this.onFrame.bind(this));
+
+    this.localTrail = new AnimatedTrail(animationFrameHandler, app, {
      ...this.getTrailOptions(),
      fill: () => DEFAULT_LASER_COLOR,
    });
@@ -56,45 +63,30 @@ export class LaserTrails implements Trail {

  start(container: SVGSVGElement) {
    this.container = container;
+
+    this.animationFrameHandler.start(this);
    this.localTrail.start(container);
  }

  stop() {
+    this.animationFrameHandler.stop(this);
    this.localTrail.stop();
-    this.stopCollabTrails();
-    this.container = undefined;
  }

-  private stopCollabTrails(collaborators?: App["state"]["collaborators"]) {
-    for (const [key, trail] of this.collabTrails) {
-      const collaborator = collaborators?.get(key);
-
-      if (!collaborator) {
-        trail.stop();
-        this.collabTrails.delete(key);
-      }
-    }
+  onFrame() {
+    this.updateCollabTrails();
  }

-  updateCollabTrails(collaborators: App["state"]["collaborators"]) {
-    this.stopCollabTrails(collaborators);
-
-    if (!this.container || collaborators.size === 0) {
+  private updateCollabTrails() {
+    if (!this.container || this.app.state.collaborators.size === 0) {
      return;
    }

-    for (const [key, collaborator] of collaborators.entries()) {
-      // Current user has their own trail drawn via localTrail
-      if (collaborator.isCurrentUser) {
-        continue;
-      }
+    for (const [key, collaborator] of this.app.state.collaborators.entries()) {
+      let trail!: AnimatedTrail;

-      // IDEA: Use the collaborator pointer coordinates to trace out the
-      // laser pointer trail when 1) the selected collab tool is the laser
-      // pointer and 2) the collab pointer button is in the "down" state.
-      let trail = this.collabTrails.get(key);
-      if (!trail) {
-        trail = new AnimatedTrail(this.app, {
+      if (!this.collabTrails.has(key)) {
+        trail = new AnimatedTrail(this.animationFrameHandler, this.app, {
          ...this.getTrailOptions(),
          fill: () =>
            collaborator.pointer?.laserColor ||
@@ -103,33 +95,36 @@ export class LaserTrails implements Trail {
        trail.start(this.container);

        this.collabTrails.set(key, trail);
+      } else {
+        trail = this.collabTrails.get(key)!;
      }

      if (collaborator.pointer && collaborator.pointer.tool === "laser") {
-        const buttonDown = collaborator.button === "down";
-        const buttonUp = collaborator.button === "up";
-        const hasTrail = trail.hasCurrentTrail;
-
-        // Initialize a new trail
-        if (buttonDown && !hasTrail) {
+        if (collaborator.button === "down" && !trail.hasCurrentTrail) {
          trail.startPath(collaborator.pointer.x, collaborator.pointer.y);
        }

-        // Add only original points
-        const lastPointOriginal = !trail.hasLastPoint(
-          collaborator.pointer.x,
-          collaborator.pointer.y,
-        );
-        if (buttonDown && lastPointOriginal) {
+        if (
+          collaborator.button === "down" &&
+          trail.hasCurrentTrail &&
+          !trail.hasLastPoint(collaborator.pointer.x, collaborator.pointer.y)
+        ) {
          trail.addPointToPath(collaborator.pointer.x, collaborator.pointer.y);
        }

-        // End the trail on button up
-        if (buttonUp && hasTrail) {
+        if (collaborator.button === "up" && trail.hasCurrentTrail) {
          trail.addPointToPath(collaborator.pointer.x, collaborator.pointer.y);
          trail.endPath();
        }
      }
    }
+
+    for (const key of this.collabTrails.keys()) {
+      if (!this.app.state.collaborators.has(key)) {
+        const trail = this.collabTrails.get(key)!;
+        trail.stop();
+        this.collabTrails.delete(key);
+      }
+    }
  }
 }
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
dwelle	9448cca81d	feat(editor): highlight duplicate matches in mermaid editor	2026-03-24 16:16:44 +01:00
dwelle	217c59a13a	feat(editor): highlight TTD assistant responses	2026-03-24 16:14:26 +01:00