feat(todos): favicon maison + mode édition double-tap/double-clic

- Favicon SVG maison Gruvbox orange sur fond sombre
- TodoForm accepte initialValues et submitLabel pour l'édition
- SwipeableRow détecte le double-tap (< 300ms, sans déplacement)
- TodosPage : double-tap mobile / double-clic laptop ouvre l'édition

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

frontend/src/pages/TodosPage.tsx

@@ -5,6 +5,8 @@ import { fetchTodos, createTodo, updateTodo, deleteTodo, postponeTodo } from '..
 import SwipeableRow from '../components/todos/SwipeableRow'
 import TodoForm from '../components/todos/TodoForm'
 
+type EditingTodo = Todo | null
+
 const DOMAINS = [
   'informatique', 'diy', 'electronique', 'domotique',
   'bricolage', 'jardin', 'cuisine', 'voyage', 'animaux',
@@ -31,6 +33,7 @@ export default function TodosPage() {
   const [loading, setLoading] = useState(true)
   const [error, setError] = useState<string | null>(null)
   const [showForm, setShowForm] = useState(false)
+  const [editingTodo, setEditingTodo] = useState<EditingTodo>(null)
   const [filters, setFilters] = useState<TodoFilters>({ status: 'pending' })
 
   const load = useCallback(async () => {
@@ -57,6 +60,16 @@ export default function TodosPage() {
     }
   }
 
+  async function handleUpdate(id: string, data: TodoCreate) {
+    try {
+      await updateTodo(id, data)
+      setEditingTodo(null)
+      void load()
+    } catch {
+      setError('Erreur lors de la mise à jour')
+    }
+  }
+
   async function handleDone(id: string) {
     try {
       await updateTodo(id, { status: 'done' })
@@ -148,6 +161,30 @@ export default function TodosPage() {
         </div>
       )}
 
+      {/* Formulaire d'édition */}
+      {editingTodo && (
+        <div className="glass" style={{ padding: 16, borderRadius: 10, marginBottom: 16, borderLeft: '3px solid var(--accent)' }}>
+          <p style={{ color: 'var(--ink-3)', fontSize: 11, fontFamily: 'var(--font-ui)', marginBottom: 8, textTransform: 'uppercase', letterSpacing: 1 }}>
+            Modifier la tâche
+          </p>
+          <TodoForm
+            onSubmit={data => handleUpdate(editingTodo.id, data)}
+            onCancel={() => setEditingTodo(null)}
+            extended
+            submitLabel="Enregistrer"
+            initialValues={{
+              title: editingTodo.title,
+              domain: editingTodo.domain ?? undefined,
+              priority: editingTodo.priority,
+              due_date: editingTodo.due_date ?? undefined,
+              body: editingTodo.body ?? undefined,
+              url: editingTodo.url ?? undefined,
+              tags: editingTodo.tags,
+            }}
+          />
+        </div>
+      )}
+
       {loading && (
         <p style={{ color: 'var(--ink-3)', textAlign: 'center', padding: 24 }}>Chargement…</p>
       )}
@@ -177,6 +214,7 @@ export default function TodosPage() {
                 <SwipeableRow
                   key={todo.id}
                   onSwipeRight={() => void handleDone(todo.id)}
+                  onDoubleTap={() => setEditingTodo(todo)}
                   rightContent={
                     <div style={{ display: 'flex', gap: 4, padding: '0 8px' }}>
                       <button
@@ -265,7 +303,11 @@ export default function TodosPage() {
                         background: idx % 2 === 0 ? 'transparent' : 'rgba(0,0,0,0.1)',
                       }}
                     >
-                      <td style={{ padding: '10px 14px', color: 'var(--ink-1)', maxWidth: 280 }}>
+                      <td
+                        style={{ padding: '10px 14px', color: 'var(--ink-1)', maxWidth: 280, cursor: 'pointer' }}
+                        onDoubleClick={() => setEditingTodo(todo)}
+                        title="Double-clic pour modifier"
+                      >
                         <div style={{ overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>
                           {todo.title}
                         </div>