feat: implement radar app — list, editor, chart, scoring, PNG export

- vue-router with list (/) and editor (/radar/:id) views
- localStorage persistence via useRadars() composable
- types.ts: Radar / Criterion / Profile / Score with cardinality constants
- RadarChart.vue: SVG renderer (rings, axes, profile polygons, labels, legend)
- CriteriaEditor / ProfilesEditor / ScoreGrid components
- PNG export: SVG → canvas → blob, download + clipboard copy
- Remove 'coming soon' placeholder from App.vue

package.json

@@ -10,7 +10,8 @@
   },
   "dependencies": {
     "daisyui": "^5.5.23",
-    "vue": "^3.5.34"
+    "vue": "^3.5.34",
+    "vue-router": "^5.1.0"
   },
   "devDependencies": {
     "@tailwindcss/vite": "^4.3.1",