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/lib/squoosh/mozjpeg/mozjpeg_enc.d.ts

@@ -0,0 +1,38 @@
+// eslint-disable-next-line no-shadow
+export const enum MozJpegColorSpace {
+  GRAYSCALE = 1,
+  RGB,
+  YCbCr,
+}
+
+export interface EncodeOptions {
+  quality: number
+  baseline: boolean
+  arithmetic: boolean
+  progressive: boolean
+  optimize_coding: boolean
+  smoothing: number
+  color_space: MozJpegColorSpace
+  quant_table: number
+  trellis_multipass: boolean
+  trellis_opt_zero: boolean
+  trellis_opt_table: boolean
+  trellis_loops: number
+  auto_subsample: boolean
+  chroma_subsample: number
+  separate_chroma_quality: boolean
+  chroma_quality: number
+}
+
+export interface MozJPEGModule extends EmscriptenWasm.Module {
+  encode(
+    data: BufferSource,
+    width: number,
+    height: number,
+    options: EncodeOptions
+  ): Uint8Array
+}
+
+declare var moduleFactory: EmscriptenWasm.ModuleFactory<MozJPEGModule>
+
+export default moduleFactory