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/shared/lib/server-inserted-html.shared-runtime.js

@@ -0,0 +1,36 @@
+"use client";
+
+"use strict";
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+0 && (module.exports = {
+    ServerInsertedHTMLContext: null,
+    useServerInsertedHTML: null
+});
+function _export(target, all) {
+    for(var name in all)Object.defineProperty(target, name, {
+        enumerable: true,
+        get: all[name]
+    });
+}
+_export(exports, {
+    ServerInsertedHTMLContext: function() {
+        return ServerInsertedHTMLContext;
+    },
+    useServerInsertedHTML: function() {
+        return useServerInsertedHTML;
+    }
+});
+const _interop_require_wildcard = require("@swc/helpers/_/_interop_require_wildcard");
+const _react = /*#__PURE__*/ _interop_require_wildcard._(require("react"));
+const ServerInsertedHTMLContext = /*#__PURE__*/ _react.default.createContext(null);
+function useServerInsertedHTML(callback) {
+    const addInsertedServerHTMLCallback = (0, _react.useContext)(ServerInsertedHTMLContext);
+    // Should have no effects on client where there's no flush effects provider
+    if (addInsertedServerHTMLCallback) {
+        addInsertedServerHTMLCallback(callback);
+    }
+}
+
+//# sourceMappingURL=server-inserted-html.shared-runtime.js.map