Add side panels, task selection, graph animation, and project docs

- Foldable left panel (user profile) and right panel (task details)
- Clicking a task in the list or graph node selects it and shows details
- Both views (task list + graph) always mounted via absolute inset-0 for
  correct canvas dimensions; tabs toggle visibility with opacity
- Graph node selection animation: other nodes repel outward (charge -600),
  then selected node smoothly slides to center (500ms cubic ease-out),
  then charge restores to -120 and graph stabilizes
- Graph re-fits on tab switch and panel resize via ResizeObserver
- Fix UUID string IDs throughout (backend returns UUIDs, not integers)
- Add TaskDetailPanel, UserPanel components
- Add CLAUDE.md project documentation

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

frontend/node_modules/next/dist/build/output/index.d.ts

@@ -0,0 +1,20 @@
+import type { webpack } from 'next/dist/compiled/webpack/webpack';
+export declare function startedDevelopmentServer(appUrl: string, bindAddr: string): void;
+type AmpStatus = {
+    message: string;
+    line: number;
+    col: number;
+    specUrl: string | null;
+    code: string;
+};
+export type AmpPageStatus = {
+    [page: string]: {
+        errors: AmpStatus[];
+        warnings: AmpStatus[];
+    };
+};
+export declare function formatAmpMessages(amp: AmpPageStatus): string;
+export declare function ampValidation(page: string, errors: AmpStatus[], warnings: AmpStatus[]): void;
+export declare function watchCompilers(client: webpack.Compiler, server: webpack.Compiler, edgeServer: webpack.Compiler): void;
+export declare function reportTrigger(trigger: string, url?: string): void;
+export {};