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/@babel/runtime/helpers/setFunctionName.js

@@ -0,0 +1,12 @@
+var _typeof = require("./typeof.js")["default"];
+function setFunctionName(e, t, n) {
+  "symbol" == _typeof(t) && (t = (t = t.description) ? "[" + t + "]" : "");
+  try {
+    Object.defineProperty(e, "name", {
+      configurable: !0,
+      value: n ? n + " " + t : t
+    });
+  } catch (e) {}
+  return e;
+}
+module.exports = setFunctionName, module.exports.__esModule = true, module.exports["default"] = module.exports;