fix: Browser mode 404 error for meeting-detail page

- Preserve query parameters (e.g., ?id=123) when opening in browser
- Add packaged mode detection for CLIENT_DIR path resolution
- Include client files in extraResources for backend to serve
- Add debug logging for client directory detection

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

client/package.json

@@ -41,6 +41,26 @@
       {
         "from": "config.json",
         "to": "config.json"
+      },
+      {
+        "from": "src/pages",
+        "to": "backend/client/pages",
+        "filter": ["**/*"]
+      },
+      {
+        "from": "src/styles",
+        "to": "backend/client/styles",
+        "filter": ["**/*"]
+      },
+      {
+        "from": "src/services",
+        "to": "backend/client/services",
+        "filter": ["**/*"]
+      },
+      {
+        "from": "src/config",
+        "to": "backend/client/config",
+        "filter": ["**/*"]
       }
     ],
     "win": {