feat: Add AI report generation with DIFY integration

- Add Users table for display name resolution from AD authentication
- Integrate DIFY AI service for report content generation
- Create docx assembly service with image embedding from MinIO
- Add REST API endpoints for report generation and download
- Add WebSocket notifications for generation progress
- Add frontend UI with progress modal and download functionality
- Add integration tests for report generation flow

Report sections (Traditional Chinese):
- 事件摘要 (Summary)
- 時間軸 (Timeline)
- 參與人員 (Participants)
- 處理過程 (Resolution Process)
- 目前狀態 (Current Status)
- 最終處置結果 (Final Resolution)

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

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

app/modules/report_generation/prompts.py

@@ -0,0 +1,199 @@
+"""Prompt templates for DIFY AI report generation
+
+Contains the prompt construction logic for building the user query
+sent to DIFY Chat API.
+"""
+from typing import List, Dict, Any
+from datetime import datetime
+
+
+INCIDENT_TYPE_MAP = {
+    "equipment_failure": "設備故障",
+    "material_shortage": "物料短缺",
+    "quality_issue": "品質問題",
+    "other": "其他",
+}
+
+SEVERITY_MAP = {
+    "low": "低",
+    "medium": "中",
+    "high": "高",
+    "critical": "緊急",
+}
+
+STATUS_MAP = {
+    "active": "處理中",
+    "resolved": "已解決",
+    "archived": "已封存",
+}
+
+MEMBER_ROLE_MAP = {
+    "owner": "建立者",
+    "editor": "編輯者",
+    "viewer": "檢視者",
+}
+
+
+def build_report_prompt(
+    room_data: Dict[str, Any],
+    messages: List[Dict[str, Any]],
+    members: List[Dict[str, Any]],
+    files: List[Dict[str, Any]],
+) -> str:
+    """Build the complete prompt for DIFY report generation
+
+    Args:
+        room_data: Room metadata (title, type, severity, status, etc.)
+        messages: List of messages with sender_name, content, created_at
+        members: List of members with display_name, role
+        files: List of files with filename, file_type, uploaded_at, uploader_name
+
+    Returns:
+        Formatted prompt string for DIFY API
+    """
+    sections = []
+
+    # Section 1: Event Information
+    sections.append(_format_room_info(room_data))
+
+    # Section 2: Participants
+    sections.append(_format_members(members))
+
+    # Section 3: Message Timeline
+    sections.append(_format_messages(messages))
+
+    # Section 4: File Attachments
+    sections.append(_format_files(files))
+
+    # Section 5: Instructions
+    sections.append(_format_instructions())
+
+    return "\n\n".join(sections)
+
+
+def _format_room_info(room_data: Dict[str, Any]) -> str:
+    """Format room metadata section"""
+    incident_type = INCIDENT_TYPE_MAP.get(
+        room_data.get("incident_type"), room_data.get("incident_type")
+    )
+    severity = SEVERITY_MAP.get(room_data.get("severity"), room_data.get("severity"))
+    status = STATUS_MAP.get(room_data.get("status"), room_data.get("status"))
+
+    created_at = room_data.get("created_at")
+    if isinstance(created_at, datetime):
+        created_at = created_at.strftime("%Y-%m-%d %H:%M")
+
+    resolved_at = room_data.get("resolved_at")
+    if isinstance(resolved_at, datetime):
+        resolved_at = resolved_at.strftime("%Y-%m-%d %H:%M")
+    elif resolved_at is None:
+        resolved_at = "尚未解決"
+
+    lines = [
+        "## 事件資訊",
+        f"- 標題: {room_data.get('title', '未命名')}",
+        f"- 類型: {incident_type}",
+        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"- 建立時間: {created_at}",
+        f"- 解決時間: {resolved_at}",
+    ]
+
+    if room_data.get("description"):
+        lines.append(f"- 事件描述: {room_data['description']}")
+
+    if room_data.get("resolution_notes"):
+        lines.append(f"- 解決備註: {room_data['resolution_notes']}")
+
+    return "\n".join(lines)
+
+
+def _format_members(members: List[Dict[str, Any]]) -> str:
+    """Format participants section"""
+    lines = ["## 參與人員"]
+
+    if not members:
+        lines.append("無參與人員記錄")
+        return "\n".join(lines)
+
+    for member in members:
+        display_name = member.get("display_name") or member.get("user_id", "未知")
+        role = MEMBER_ROLE_MAP.get(member.get("role"), member.get("role", "成員"))
+        lines.append(f"- {display_name} ({role})")
+
+    return "\n".join(lines)
+
+
+def _format_messages(messages: List[Dict[str, Any]]) -> str:
+    """Format message timeline section"""
+    lines = ["## 對話記錄"]
+
+    if not messages:
+        lines.append("無對話記錄")
+        return "\n".join(lines)
+
+    for msg in messages:
+        sender = msg.get("sender_name") or msg.get("sender_id", "未知")
+        content = msg.get("content", "")
+        msg_type = msg.get("message_type", "text")
+
+        created_at = msg.get("created_at")
+        if isinstance(created_at, datetime):
+            time_str = created_at.strftime("%Y-%m-%d %H:%M")
+        else:
+            time_str = str(created_at) if created_at else "未知時間"
+
+        # Handle different message types
+        if msg_type == "file":
+            file_name = msg.get("file_name", "附件")
+            lines.append(f"[{time_str}] {sender}: [上傳檔案: {file_name}]")
+        elif msg_type == "image":
+            lines.append(f"[{time_str}] {sender}: [上傳圖片]")
+        elif msg_type == "system":
+            lines.append(f"[{time_str}] [系統]: {content}")
+        else:
+            lines.append(f"[{time_str}] {sender}: {content}")
+
+    return "\n".join(lines)
+
+
+def _format_files(files: List[Dict[str, Any]]) -> str:
+    """Format file attachments section"""
+    lines = ["## 附件清單"]
+
+    if not files:
+        lines.append("無附件")
+        return "\n".join(lines)
+
+    for f in files:
+        filename = f.get("filename", "未命名檔案")
+        file_type = f.get("file_type", "file")
+        uploader = f.get("uploader_name") or f.get("uploaded_by", "未知")
+
+        uploaded_at = f.get("uploaded_at")
+        if isinstance(uploaded_at, datetime):
+            time_str = uploaded_at.strftime("%Y-%m-%d %H:%M")
+        else:
+            time_str = str(uploaded_at) if uploaded_at else ""
+
+        type_label = "圖片" if file_type == "image" else "檔案"
+        lines.append(f"- [{type_label}] {filename} (由 {uploader} 於 {time_str} 上傳)")
+
+    return "\n".join(lines)
+
+
+def _format_instructions() -> str:
+    """Format generation instructions"""
+    return """## 報告生成指示
+
+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)
+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
+5. **current_status**: 目前狀態說明
+6. **final_resolution**: 最終處置結果（若已解決）
+
+請直接輸出 JSON，不要包含其他說明文字。"""