feat: enhance canvas and layout components with new features and improvements

- Added remote image patterns to the Next.js configuration for enhanced image handling.
- Updated TypeScript configuration to exclude the 'implement' directory.
- Refactored layout component to fetch initial authentication token and pass it to Providers.
- Replaced CanvasToolbar with CanvasSidebar for improved UI layout and functionality.
- Enhanced Canvas component with new drag-and-drop file upload capabilities and batch node movement.
- Updated various node components to support new status handling and improved user interactions.
- Added debounced saving for note and prompt nodes to optimize performance.

convex/helpers.ts

@@ -17,10 +17,14 @@ export async function requireAuth(
 ): Promise<AuthUser> {
   const user = await authComponent.safeGetAuthUser(ctx);
   if (!user) {
+    console.error("[requireAuth] safeGetAuthUser returned null");
     throw new Error("Unauthenticated");
   }
   const userId = user.userId ?? String(user._id);
   if (!userId) {
+    console.error("[requireAuth] safeGetAuthUser returned user without userId", {
+      userRecordId: String(user._id),
+    });
     throw new Error("Unauthenticated");
   }
   return { ...user, userId };