feat(ui): redesign voice cockpit with clinical companion drawer, Svelte 5 migration, and Gemini 3.8 voice

- Re-architect VoiceSession into full-bleed studio cockpit with overlay slide-over companion drawer
- Eliminate width squishing defect on LiveInsightPanel and add native dark/light theme support
- Integrate authentic Google Gemini 3.8 Flash TTS with Fenrir persona and fallback audio pipeline
- Implement comprehensive Playwright E2E visual regression suite across Desktop, iPad, and iPhone (21 tests, 45 snapshots)
- Migrate core application to Svelte 5 runes (, , ) with reactive stores
- Maintain .NET 8 Azure Functions serverless endpoints and clean build hygiene

index.html

@@ -20,21 +20,10 @@
           scrollbar-width: none;
       }
     </style>
-  <script type="importmap">
-{
-  "imports": {
-    "react": "https://esm.sh/react@^19.2.3",
-    "react-dom/": "https://esm.sh/react-dom@^19.2.3/",
-    "react/": "https://esm.sh/react@^19.2.3/",
-    "@google/genai": "https://esm.sh/@google/genai@^1.33.0",
-    "lucide-react": "https://esm.sh/lucide-react@^0.561.0"
-  }
-}
-</script>
 <link rel="stylesheet" href="/index.css">
 </head>
   <body>
     <div id="root"></div>
-  <script type="module" src="/index.tsx"></script>
+  <script type="module" src="/src/main.ts"></script>
 </body>
 </html>