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/.next/static/chunks/app/layout.js

@@ -0,0 +1,39 @@
+/*
+ * ATTENTION: An "eval-source-map" devtool has been used.
+ * This devtool is neither made for production nor for readable output files.
+ * It uses "eval()" calls to create a separate source file with attached SourceMaps in the browser devtools.
+ * If you are trying to read the output file, select a different devtool (https://webpack.js.org/configuration/devtool/)
+ * or disable the default devtool with "devtool: false".
+ * If you are looking for production-ready output files, see mode: "production" (https://webpack.js.org/configuration/mode/).
+ */
+(self["webpackChunk_N_E"] = self["webpackChunk_N_E"] || []).push([["app/layout"],{
+
+/***/ "(app-pages-browser)/./node_modules/next/dist/build/webpack/loaders/next-flight-client-entry-loader.js?modules=%7B%22request%22%3A%22%2Fhome%2Falvis%2Ftaskpile%2Ffrontend%2Fsrc%2Fapp%2Fglobals.css%22%2C%22ids%22%3A%5B%5D%7D&server=false!":
+/*!********************************************************************************************************************************************************************************************************************************!*\
+  !*** ./node_modules/next/dist/build/webpack/loaders/next-flight-client-entry-loader.js?modules=%7B%22request%22%3A%22%2Fhome%2Falvis%2Ftaskpile%2Ffrontend%2Fsrc%2Fapp%2Fglobals.css%22%2C%22ids%22%3A%5B%5D%7D&server=false! ***!
+  \********************************************************************************************************************************************************************************************************************************/
+/***/ (function(__unused_webpack_module, __unused_webpack_exports, __webpack_require__) {
+
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+
+/***/ }),
+
+/***/ "(app-pages-browser)/./src/app/globals.css":
+/*!*****************************!*\
+  !*** ./src/app/globals.css ***!
+  \*****************************/
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
+
+"use strict";
+eval(__webpack_require__.ts("__webpack_require__.r(__webpack_exports__);\n/* harmony default export */ __webpack_exports__[\"default\"] = (\"6810ef099409\");\nif (true) { module.hot.accept() }\n//# sourceURL=[module]\n//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiKGFwcC1wYWdlcy1icm93c2VyKS8uL3NyYy9hcHAvZ2xvYmFscy5jc3MiLCJtYXBwaW5ncyI6IjtBQUFBLCtEQUFlLGNBQWM7QUFDN0IsSUFBSSxJQUFVLElBQUksaUJBQWlCIiwic291cmNlcyI6WyJ3ZWJwYWNrOi8vX05fRS8uL3NyYy9hcHAvZ2xvYmFscy5jc3M/ODBkMSJdLCJzb3VyY2VzQ29udGVudCI6WyJleHBvcnQgZGVmYXVsdCBcIjY4MTBlZjA5OTQwOVwiXG5pZiAobW9kdWxlLmhvdCkgeyBtb2R1bGUuaG90LmFjY2VwdCgpIH1cbiJdLCJuYW1lcyI6W10sInNvdXJjZVJvb3QiOiIifQ==\n//# sourceURL=webpack-internal:///(app-pages-browser)/./src/app/globals.css\n"));
+
+/***/ })
+
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+/******/ var __webpack_exports__ = __webpack_require__.O();
+/******/ _N_E = __webpack_exports__;
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+]);