feat(mcp): 5 outils notes + tests

Ajoute search_notes, get_note, create_note, update_note, delete_note au serveur MCP.
Tests: 6 nouveaux tests notes (13 tests MCP au total, tous passent).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/tests/test_mcp.py

@@ -1,11 +1,15 @@
 import json
 import pytest
 from sqlalchemy import delete
+import app.api.mcp_server as mcp_server_module
 from app.api.mcp_server import (
     get_todos, create_todo, update_todo, postpone_todo, delete_todo,
 )
-from app.core.database import AsyncSessionLocal
+from app.api.mcp_server import (
+    search_notes, get_note, create_note, update_note, delete_note,
+)
 from app.models.todos import TodoItem
+from app.models.notes import NoteItem
 
 pytestmark = pytest.mark.usefixtures("mcp_nullpool_session")
 
@@ -13,8 +17,10 @@ pytestmark = pytest.mark.usefixtures("mcp_nullpool_session")
 @pytest.fixture(autouse=True)
 async def cleanup_mcp_todos():
     yield
-    async with AsyncSessionLocal() as session:
+    # Utilise AsyncSessionLocal depuis le module mcp_server (patché par mcp_nullpool_session)
+    async with mcp_server_module.AsyncSessionLocal() as session:
         await session.execute(delete(TodoItem).where(TodoItem.title.like("TEST_MCP_%")))
+        await session.execute(delete(NoteItem).where(NoteItem.title.like("TEST_MCP_%")))
         await session.commit()
 
 
@@ -67,3 +73,51 @@ async def test_delete_todo_introuvable():
     result = await delete_todo(id="00000000-0000-0000-0000-000000000000")
     data = json.loads(result)
     assert "error" in data
+
+
+# ── NOTES ──────────────────────────────────────────────────────────────────────
+
+async def test_search_notes_retourne_liste():
+    result = await search_notes(query="inexistant_xyz_abc_999")
+    data = json.loads(result)
+    assert isinstance(data, list)
+    assert data == []
+
+
+async def test_create_note_outil():
+    result = await create_note(title="TEST_MCP_note_create", content="Contenu de test MCP")
+    data = json.loads(result)
+    assert data["title"] == "TEST_MCP_note_create"
+    assert "id" in data
+    await delete_note(id=str(data["id"]))
+
+
+async def test_get_note_outil():
+    created = json.loads(await create_note(title="TEST_MCP_note_get", content="Contenu get"))
+    result = await get_note(id=str(created["id"]))
+    data = json.loads(result)
+    assert data["title"] == "TEST_MCP_note_get"
+    assert data["content"] == "Contenu get"
+    assert "attachments" in data
+    await delete_note(id=str(created["id"]))
+
+
+async def test_update_note_outil():
+    created = json.loads(await create_note(title="TEST_MCP_note_update", content="avant"))
+    result = await update_note(id=str(created["id"]), content="après")
+    data = json.loads(result)
+    assert "id" in data
+    await delete_note(id=str(created["id"]))
+
+
+async def test_delete_note_outil():
+    created = json.loads(await create_note(title="TEST_MCP_note_delete", content="x"))
+    result = await delete_note(id=str(created["id"]))
+    data = json.loads(result)
+    assert "deleted" in data
+
+
+async def test_get_note_introuvable():
+    result = await get_note(id="00000000-0000-0000-0000-000000000000")
+    data = json.loads(result)
+    assert "error" in data