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/build/polyfills/fetch/index.d.ts

@@ -0,0 +1 @@
+declare const fetchModule: ((input: RequestInfo | URL, init?: RequestInit | undefined) => Promise<Response>) & typeof fetch;

frontend/node_modules/next/dist/build/polyfills/fetch/index.js

@@ -0,0 +1,6 @@
+/* globals self */ "use strict";
+const fetchModule = self.fetch.bind(self);
+module.exports = fetchModule;
+module.exports.default = module.exports;
+
+//# sourceMappingURL=index.js.map

frontend/node_modules/next/dist/build/polyfills/fetch/index.js.map

@@ -0,0 +1 @@
+{"version":3,"sources":["../../../../src/build/polyfills/fetch/index.ts"],"names":["fetchModule","self","fetch","bind","module","exports","default"],"mappings":"AAAA,gBAAgB;AAChB,MAAMA,cAAcC,KAAKC,KAAK,CAACC,IAAI,CAACF;AACpCG,OAAOC,OAAO,GAAGL;AACjBI,OAAOC,OAAO,CAACC,OAAO,GAAGF,OAAOC,OAAO"}

frontend/node_modules/next/dist/build/polyfills/fetch/whatwg-fetch.js

@@ -0,0 +1,7 @@
+/* globals self */ "use strict";
+exports.Headers = self.Headers;
+exports.Request = self.Request;
+exports.Response = self.Response;
+exports.fetch = self.fetch;
+
+//# sourceMappingURL=whatwg-fetch.js.map

frontend/node_modules/next/dist/build/polyfills/fetch/whatwg-fetch.js.map

@@ -0,0 +1 @@
+{"version":3,"sources":["../../../../src/build/polyfills/fetch/whatwg-fetch.ts"],"names":["exports","Headers","self","Request","Response","fetch"],"mappings":"AAAA,gBAAgB;AAChBA,QAAQC,OAAO,GAAGC,KAAKD,OAAO;AAC9BD,QAAQG,OAAO,GAAGD,KAAKC,OAAO;AAC9BH,QAAQI,QAAQ,GAAGF,KAAKE,QAAQ;AAChCJ,QAAQK,KAAK,GAAGH,KAAKG,KAAK"}