feat: AI 서비스 및 AI 어시스턴트 전용 페이지 추가

- ai-service: Ollama 기반 AI 서비스 (분류, 시맨틱 검색, RAG Q&A, 패턴 분석)
- AI 어시스턴트 페이지: 채팅형 Q&A, 시맨틱 검색, 패턴 분석, 분류 테스트
- 권한 시스템에 ai_assistant 페이지 등록 (기본 비활성)
- 기존 페이지에 AI 기능 통합 (대시보드, 수신함, 관리함)
- docker-compose, gateway, nginx 설정 업데이트

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ai-service/routers/daily_report.py

@@ -0,0 +1,33 @@
+from fastapi import APIRouter, Request
+from pydantic import BaseModel
+from services.report_service import generate_daily_report
+from datetime import date
+
+router = APIRouter(tags=["daily_report"])
+
+
+class DailyReportRequest(BaseModel):
+    date: str | None = None
+    project_id: int | None = None
+
+
+@router.post("/report/daily")
+async def daily_report(req: DailyReportRequest, request: Request):
+    report_date = req.date or date.today().isoformat()
+    token = request.headers.get("authorization", "").replace("Bearer ", "")
+    try:
+        result = await generate_daily_report(report_date, req.project_id, token)
+        return {"available": True, **result}
+    except Exception as e:
+        return {"available": False, "error": str(e)}
+
+
+@router.post("/report/preview")
+async def report_preview(req: DailyReportRequest, request: Request):
+    report_date = req.date or date.today().isoformat()
+    token = request.headers.get("authorization", "").replace("Bearer ", "")
+    try:
+        result = await generate_daily_report(report_date, req.project_id, token)
+        return {"available": True, "preview": True, **result}
+    except Exception as e:
+        return {"available": False, "error": str(e)}