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/createForOfIteratorHelperLoose.js

@@ -0,0 +1,19 @@
+var unsupportedIterableToArray = require("./unsupportedIterableToArray.js");
+function _createForOfIteratorHelperLoose(r, e) {
+  var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
+  if (t) return (t = t.call(r)).next.bind(t);
+  if (Array.isArray(r) || (t = unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) {
+    t && (r = t);
+    var o = 0;
+    return function () {
+      return o >= r.length ? {
+        done: !0
+      } : {
+        done: !1,
+        value: r[o++]
+      };
+    };
+  }
+  throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+}
+module.exports = _createForOfIteratorHelperLoose, module.exports.__esModule = true, module.exports["default"] = module.exports;