feat: CONAI Phase 1 MVP 초기 구현

소형 건설업체(100억 미만)를 위한 AI 기반 토목공사 통합관리 플랫폼

Backend (FastAPI):
- SQLAlchemy 모델 13개 (users, projects, wbs, tasks, daily_reports, reports, inspections, quality, weather, permits, rag, settings)
- API 라우터 11개 (auth, projects, tasks, daily_reports, reports, inspections, weather, rag, kakao, permits, settings)
- Services: Claude AI 래퍼, CPM Gantt 계산, 기상청 API, RAG(pgvector), 카카오 Skill API
- Alembic 마이그레이션 (pgvector 포함)
- pytest 테스트 (CPM, 날씨 경보)

Frontend (Next.js 15):
- 11개 페이지 (대시보드, 프로젝트, Gantt, 일보, 검측, 품질, 날씨, 인허가, RAG, 설정)
- TanStack Query + Zustand + Tailwind CSS

인프라:
- Docker Compose (PostgreSQL pgvector + backend + frontend)
- 한국어 README 및 설치 가이드

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

backend/app/api/auth.py

@@ -0,0 +1,74 @@
+from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordRequestForm
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+from typing import Annotated
+from app.core.database import get_db
+from app.core.security import verify_password, get_password_hash, create_access_token, create_refresh_token, decode_token
+from app.models.user import User
+from app.schemas.user import UserCreate, UserResponse, TokenResponse
+from app.deps import CurrentUser
+
+router = APIRouter(prefix="/auth", tags=["인증"])
+
+
+@router.post("/register", response_model=UserResponse, status_code=status.HTTP_201_CREATED)
+async def register(data: UserCreate, db: Annotated[AsyncSession, Depends(get_db)]):
+    result = await db.execute(select(User).where(User.email == data.email))
+    if result.scalar_one_or_none():
+        raise HTTPException(status_code=400, detail="이미 등록된 이메일입니다")
+
+    user = User(
+        email=data.email,
+        hashed_password=get_password_hash(data.password),
+        name=data.name,
+        role=data.role,
+        phone=data.phone,
+    )
+    db.add(user)
+    await db.commit()
+    await db.refresh(user)
+    return user
+
+
+@router.post("/login", response_model=TokenResponse)
+async def login(
+    form_data: Annotated[OAuth2PasswordRequestForm, Depends()],
+    db: Annotated[AsyncSession, Depends(get_db)],
+):
+    result = await db.execute(select(User).where(User.email == form_data.username, User.is_active == True))
+    user = result.scalar_one_or_none()
+    if not user or not verify_password(form_data.password, user.hashed_password):
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="이메일 또는 비밀번호가 올바르지 않습니다",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    return TokenResponse(
+        access_token=create_access_token(str(user.id)),
+        refresh_token=create_refresh_token(str(user.id)),
+        user=UserResponse.model_validate(user),
+    )
+
+
+@router.post("/refresh", response_model=TokenResponse)
+async def refresh_token(refresh_token_str: str, db: Annotated[AsyncSession, Depends(get_db)]):
+    payload = decode_token(refresh_token_str)
+    if not payload or payload.get("type") != "refresh":
+        raise HTTPException(status_code=401, detail="유효하지 않은 리프레시 토큰입니다")
+
+    result = await db.execute(select(User).where(User.id == payload["sub"], User.is_active == True))
+    user = result.scalar_one_or_none()
+    if not user:
+        raise HTTPException(status_code=401, detail="사용자를 찾을 수 없습니다")
+
+    return TokenResponse(
+        access_token=create_access_token(str(user.id)),
+        refresh_token=create_refresh_token(str(user.id)),
+        user=UserResponse.model_validate(user),
+    )
+
+
+@router.get("/me", response_model=UserResponse)
+async def get_me(current_user: CurrentUser):
+    return current_user