fix(lab): ouvrir le bon diagramme sans F5 (?id alias ?canvas + tri canvases)

Co-authored-by: Cursor <cursoragent@cursor.com>

memento-note/app/(main)/lab/page.tsx

@@ -14,18 +14,18 @@ export const dynamic = 'force-dynamic'
 export const revalidate = 0
 
 export default async function LabPage(props: {
-  searchParams: Promise<{ id?: string }>
+  searchParams: Promise<{ id?: string; canvas?: string }>
 }) {
   const searchParams = await props.searchParams
-  const id = searchParams.id
+  /** Canonical param is id; notifications / older UI used canvas= */
+  const requestedId = searchParams.id ?? searchParams.canvas
   
   const session = await auth()
   if (!session?.user?.id) redirect('/login')
 
   const canvases = await getCanvases()
   
-  // Resolve current canvas correctly
-  const currentCanvasId = searchParams.id || (canvases.length > 0 ? canvases[0].id : undefined)
+  const currentCanvasId = requestedId || (canvases.length > 0 ? canvases[0].id : undefined)
   const currentCanvas = currentCanvasId ? canvases.find(c => c.id === currentCanvasId) : undefined
 
   // Wrapper for server action creation