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.

implement/storage.ts

@@ -0,0 +1,14 @@
+import { mutation } from "./_generated/server";
+import { requireAuth } from "./helpers";
+
+/**
+ * Generiert eine kurzlebige Upload-URL für Convex File Storage.
+ * Der Client POSTet die Datei direkt an diese URL.
+ */
+export const generateUploadUrl = mutation({
+  args: {},
+  handler: async (ctx) => {
+    await requireAuth(ctx);
+    return await ctx.storage.generateUploadUrl();
+  },
+});