feat: Add Chat UX improvements with notifications and @mention support

- Add ActionBar component with expandable toolbar for mobile
- Add @mention functionality with autocomplete dropdown
- Add browser notification system (push, sound, vibration)
- Add NotificationSettings modal for user preferences
- Add mention badges on room list cards
- Add ReportPreview with Markdown rendering and copy/download
- Add message copy functionality with hover actions
- Add backend mentions field to messages with Alembic migration
- Add lots field to rooms, remove templates
- Optimize WebSocket database session handling
- Various UX polish (animations, accessibility)

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

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

app/modules/report_generation/prompts.py

@@ -89,6 +89,10 @@ def _format_room_info(room_data: Dict[str, Any]) -> str:
     elif resolved_at is None:
         resolved_at = "尚未解決"
 
+    # Format LOT batch numbers
+    lots = room_data.get('lots', [])
+    lots_str = ", ".join(lots) if lots else "無"
+
     lines = [
         "## 事件資訊",
         f"- 標題: {room_data.get('title', '未命名')}",
@@ -96,6 +100,7 @@ def _format_room_info(room_data: Dict[str, Any]) -> str:
         f"- 嚴重程度: {severity}",
         f"- 目前狀態: {status}",
         f"- 發生地點: {room_data.get('location', '未指定')}",
+        f"- 影響批號 (LOT): {lots_str}",
         f"- 建立時間: {created_at}",
         f"- 解決時間: {resolved_at}",
     ]
@@ -189,7 +194,7 @@ def _format_instructions() -> str:
 
 請根據以上資料，生成一份結構化的事件報告。報告必須為 JSON 格式，包含以下欄位：
 
-1. **summary**: 事件摘要 (50-100字)
+1. **summary**: 事件摘要 (50-300字)
 2. **timeline**: 按時間順序的事件時間軸
 3. **participants**: 參與人員及其角色
 4. **resolution_process**: 詳細的處理過程描述