feat: scaffold Vue 3 + Vuetify + Pinia frontend themed to FabledDesignSystem

Curator signature accent (#A87338, aged amber) is baked into
fabled-tokens.js. Vuetify theme consumes the same tokens module the rest
of the SPA does, so updating design system tokens propagates throughout.
Vite dev server proxies /api and /ws to the Quart backend.

App.vue references AppShell (lands in Task 9) and main.js references
router.js (lands in Task 9) — these are intentionally split so Task 8 is
the framework scaffold and Task 9 is the navigation/shell content.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "fabledcurator-frontend",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview",
+    "check": "vue-tsc --noEmit"
+  },
+  "dependencies": {
+    "vue": "^3.4.0",
+    "vue-router": "^4.3.0",
+    "pinia": "^2.1.0",
+    "vuetify": "^3.5.0",
+    "@mdi/font": "^7.4.0"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^5.0.0",
+    "vite": "^5.2.0",
+    "vue-tsc": "^2.0.0",
+    "vite-plugin-vuetify": "^2.0.0",
+    "sass": "^1.71.0"
+  }
+}