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/server/load-default-error-components.d.ts

@@ -0,0 +1,33 @@
+import type { AppType, DocumentType, NextComponentType } from '../shared/lib/utils';
+import type { ClientReferenceManifest } from '../build/webpack/plugins/flight-manifest-plugin';
+import type { PageConfig, GetStaticPaths, GetServerSideProps, GetStaticProps } from 'next/types';
+import type { RouteModule } from './future/route-modules/route-module';
+import type { BuildManifest } from './get-page-files';
+export type ManifestItem = {
+    id: number | string;
+    files: string[];
+};
+export type ReactLoadableManifest = {
+    [moduleId: string]: ManifestItem;
+};
+export type LoadComponentsReturnType = {
+    Component: NextComponentType;
+    pageConfig: PageConfig;
+    buildManifest: BuildManifest;
+    subresourceIntegrityManifest?: Record<string, string>;
+    reactLoadableManifest: ReactLoadableManifest;
+    clientReferenceManifest?: ClientReferenceManifest;
+    serverActionsManifest?: any;
+    Document: DocumentType;
+    App: AppType;
+    getStaticProps?: GetStaticProps;
+    getStaticPaths?: GetStaticPaths;
+    getServerSideProps?: GetServerSideProps;
+    ComponentMod: any;
+    routeModule?: RouteModule;
+    isAppPath?: boolean;
+    page: string;
+};
+declare function loadDefaultErrorComponentsImpl(distDir: string): Promise<LoadComponentsReturnType>;
+export declare const loadDefaultErrorComponents: typeof loadDefaultErrorComponentsImpl;
+export {};