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/d3-array/package.json

@@ -0,0 +1,61 @@
+{
+  "name": "d3-array",
+  "version": "3.2.4",
+  "description": "Array manipulation, ordering, searching, summarizing, etc.",
+  "homepage": "https://d3js.org/d3-array/",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/d3/d3-array.git"
+  },
+  "keywords": [
+    "d3",
+    "d3-module",
+    "histogram",
+    "bisect",
+    "shuffle",
+    "statistics",
+    "search",
+    "sort",
+    "array"
+  ],
+  "license": "ISC",
+  "author": {
+    "name": "Mike Bostock",
+    "url": "http://bost.ocks.org/mike"
+  },
+  "type": "module",
+  "files": [
+    "dist/**/*.js",
+    "src/**/*.js"
+  ],
+  "module": "src/index.js",
+  "main": "src/index.js",
+  "jsdelivr": "dist/d3-array.min.js",
+  "unpkg": "dist/d3-array.min.js",
+  "exports": {
+    "umd": "./dist/d3-array.min.js",
+    "default": "./src/index.js"
+  },
+  "sideEffects": false,
+  "dependencies": {
+    "internmap": "1 - 2"
+  },
+  "devDependencies": {
+    "@rollup/plugin-node-resolve": "15",
+    "d3-dsv": "3",
+    "d3-random": "2 - 3",
+    "eslint": "8",
+    "jsdom": "21",
+    "mocha": "10",
+    "rollup": "3",
+    "rollup-plugin-terser": "7"
+  },
+  "scripts": {
+    "test": "mocha 'test/**/*-test.js' && eslint src test",
+    "prepublishOnly": "rm -rf dist && rollup -c",
+    "postpublish": "git push && git push --tags && cd ../d3.github.com && git pull && cp ../${npm_package_name}/dist/${npm_package_name}.js ${npm_package_name}.v${npm_package_version%%.*}.js && cp ../${npm_package_name}/dist/${npm_package_name}.min.js ${npm_package_name}.v${npm_package_version%%.*}.min.js && git add ${npm_package_name}.v${npm_package_version%%.*}.js ${npm_package_name}.v${npm_package_version%%.*}.min.js && git commit -m \"${npm_package_name} ${npm_package_version}\" && git push && cd -"
+  },
+  "engines": {
+    "node": ">=12"
+  }
+}