feat(frontend): Vue 3 wizard UI (nostr login, episode upload, go-live)

- NIP-07 login → NIP-98 signed request → session cookie
- episode wizard: pick/create podcast (incl. lightning address question),
  browser-side sha256 + BUD-02 blossom upload with progress, feed result page
- live wizard + stream dashboard: OBS server/key (shown once, rotatable),
  browser WHIP publishing (camera or screen), hls.js live preview,
  publish-recording-as-episode flow
- settings view: external blossom URL, relay list, public URL (admin only)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "podpuddle-frontend",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vue-tsc -p tsconfig.json && vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "hls.js": "^1.6.0",
+    "nostr-tools": "^2.15.0",
+    "pinia": "^3.0.0",
+    "vue": "^3.5.0",
+    "vue-router": "^4.6.0"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^6.0.0",
+    "autoprefixer": "^10.4.20",
+    "postcss": "^8.5.0",
+    "tailwindcss": "^3.4.0",
+    "typescript": "^5.9.0",
+    "vite": "^7.2.0",
+    "vue-tsc": "^3.1.0"
+  }
+}