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/esm/importDeferProxy.js

@@ -0,0 +1,27 @@
+function _importDeferProxy(e) {
+  var t = null,
+    constValue = function constValue(e) {
+      return function () {
+        return e;
+      };
+    },
+    proxy = function proxy(r) {
+      return function (n, o, f) {
+        return null === t && (t = e()), r(t, o, f);
+      };
+    };
+  return new Proxy({}, {
+    defineProperty: constValue(!1),
+    deleteProperty: constValue(!1),
+    get: proxy(Reflect.get),
+    getOwnPropertyDescriptor: proxy(Reflect.getOwnPropertyDescriptor),
+    getPrototypeOf: constValue(null),
+    isExtensible: constValue(!1),
+    has: proxy(Reflect.has),
+    ownKeys: proxy(Reflect.ownKeys),
+    preventExtensions: constValue(!0),
+    set: constValue(!1),
+    setPrototypeOf: constValue(!1)
+  });
+}
+export { _importDeferProxy as default };