Initial commit: habit tracker PWA with Google OAuth, push notifications

FastAPI + SQLAlchemy/Alembic + MariaDB backend with Jinja2/htmx/Alpine
server-rendered frontend. Multi-user via Google OAuth, daily habit
tracking, monthly/weekly history views, Web Push reminders via
APScheduler, and PWA support (manifest, service worker, offline caching).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/routers/logs.py

@@ -0,0 +1,52 @@
+from datetime import date
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+
+from app.database import get_db
+from app.models.user import User
+from app.schemas.habit_log import HabitLogOut, MonthlySummaryDay, TodayItem, WeeklyMatrixRow
+from app.security import require_login
+from app.services import habit_service, log_service
+
+router = APIRouter(prefix="/api", tags=["logs"], dependencies=[Depends(require_login)])
+
+
+@router.get("/today", response_model=list[TodayItem])
+def get_today(db: Session = Depends(get_db), current_user: User = Depends(require_login)):
+    build_items, quit_items = log_service.get_today_items(db, current_user.id, date.today())
+    return build_items + quit_items
+
+
+@router.post("/logs/{habit_id}/toggle")
+def toggle_log(habit_id: int, db: Session = Depends(get_db), current_user: User = Depends(require_login)):
+    habit = habit_service.get_habit(db, habit_id, current_user.id)
+    if habit is None:
+        raise HTTPException(status_code=404, detail="습관을 찾을 수 없습니다")
+    checked, milestone_streak = log_service.toggle_check_and_celebrate(db, habit, date.today())
+    return {"checked": checked, "milestone_streak": milestone_streak}
+
+
+@router.get("/logs", response_model=list[HabitLogOut])
+def list_logs(
+    habit_id: int | None = None,
+    start: date | None = None,
+    end: date | None = None,
+    db: Session = Depends(get_db),
+    current_user: User = Depends(require_login),
+):
+    return log_service.list_logs(db, current_user.id, habit_id=habit_id, start=start, end=end)
+
+
+@router.get("/logs/summary/monthly", response_model=list[MonthlySummaryDay])
+def monthly_summary(
+    year: int, month: int, db: Session = Depends(get_db), current_user: User = Depends(require_login)
+):
+    return log_service.get_monthly_summary(db, current_user.id, year, month)
+
+
+@router.get("/logs/summary/weekly", response_model=list[WeeklyMatrixRow])
+def weekly_summary(
+    start_date: date, db: Session = Depends(get_db), current_user: User = Depends(require_login)
+):
+    return log_service.get_weekly_matrix(db, current_user.id, start_date)