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/compiled/@vercel/og/language/index.d.ts

@@ -0,0 +1,28 @@
+export declare class FontDetector {
+    private rangesByLang;
+    detect(text: string, fonts: string[]): Promise<{
+        [lang: string]: string;
+    }>;
+    private detectSegment;
+    private load;
+    private addDetectors;
+}
+export declare const languageFontMap: {
+    'ja-JP': string;
+    'ko-KR': string;
+    'zh-CN': string;
+    'zh-TW': string;
+    'zh-HK': string;
+    'th-TH': string;
+    'bn-IN': string;
+    'ar-AR': string;
+    'ta-IN': string;
+    'ml-IN': string;
+    'he-IL': string;
+    'te-IN': string;
+    devanagari: string;
+    kannada: string;
+    symbol: string[];
+    math: string;
+    unknown: string;
+};