Add per-calendar reminders_enabled flag (server)

New boolean column on every calendar type (CalDAV, local, Google, Home
Assistant, iCal subscription), default ON so existing data is unchanged.
Lets a calendar be shown without generating reminders/notifications.

- models.py: reminders_enabled on the five calendar models
- main.py _migrate(): ALTER TABLE ADD COLUMN for each table
- caldav/google/homeassistant/local/ical routers: expose the flag in the
  calendar serialization and accept it in the calendar/subscription update
  endpoints

Clients map event -> (source, calendar_id) -> reminders_enabled to skip
scheduling notifications for disabled calendars.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/routers/caldav_router.py

@@ -42,6 +42,7 @@ class CalendarUpdate(BaseModel):
     color: Optional[str] = None
     name: Optional[str] = None
     sidebar_hidden: Optional[bool] = None
+    reminders_enabled: Optional[bool] = None
 
 
 class EventCreate(BaseModel):
@@ -84,6 +85,7 @@ def _account_dict(a: models.CalDAVAccount) -> dict:
                 "enabled": c.enabled,
                 "cal_id": c.cal_id,
                 "sidebar_hidden": bool(c.sidebar_hidden),
+                "reminders_enabled": bool(c.reminders_enabled),
             }
             for c in a.calendars
         ],
@@ -270,6 +272,8 @@ def update_calendar(
         calendar.name = data.name
     if data.sidebar_hidden is not None:
         calendar.sidebar_hidden = data.sidebar_hidden
+    if data.reminders_enabled is not None:
+        calendar.reminders_enabled = data.reminders_enabled
     db.commit()
     return {"ok": True}
 

backend/routers/google_router.py

@@ -142,6 +142,7 @@ def _account_dict(a: models.GoogleAccount) -> dict:
                 "color": c.color or "#4285f4",
                 "enabled": c.enabled,
                 "sidebar_hidden": bool(c.sidebar_hidden),
+                "reminders_enabled": bool(c.reminders_enabled),
             }
             for c in a.calendars
             if not _is_system_calendar(c.cal_id)
@@ -344,6 +345,7 @@ class GoogleCalendarUpdate(BaseModel):
     color: Optional[str] = None
     name: Optional[str] = None
     sidebar_hidden: Optional[bool] = None
+    reminders_enabled: Optional[bool] = None
 
 
 @router.put("/calendars/{calendar_id}")
@@ -372,6 +374,8 @@ def update_calendar(
         gcal.name = data.name
     if data.sidebar_hidden is not None:
         gcal.sidebar_hidden = data.sidebar_hidden
+    if data.reminders_enabled is not None:
+        gcal.reminders_enabled = data.reminders_enabled
     db.commit()
     return {"ok": True}
 

backend/routers/homeassistant_router.py

@@ -349,6 +349,7 @@ def _account_dict(a: models.HomeAssistantAccount) -> dict:
                 "color": c.color or HA_DEFAULT_COLOR,
                 "enabled": c.enabled,
                 "sidebar_hidden": bool(c.sidebar_hidden),
+                "reminders_enabled": bool(c.reminders_enabled),
             }
             for c in a.calendars
         ],
@@ -375,6 +376,7 @@ class HACalendarUpdate(BaseModel):
     color: Optional[str] = None
     name: Optional[str] = None
     sidebar_hidden: Optional[bool] = None
+    reminders_enabled: Optional[bool] = None
 
 
 # ── Endpoints ─────────────────────────────────────────────
@@ -623,6 +625,8 @@ def update_calendar(
         cal.name = data.name
     if data.sidebar_hidden is not None:
         cal.sidebar_hidden = data.sidebar_hidden
+    if data.reminders_enabled is not None:
+        cal.reminders_enabled = data.reminders_enabled
     db.commit()
     return {"ok": True}
 

backend/routers/ical_router.py

@@ -29,6 +29,7 @@ class SubscriptionUpdate(BaseModel):
     color: Optional[str] = None
     enabled: Optional[bool] = None
     refresh_minutes: Optional[int] = None
+    reminders_enabled: Optional[bool] = None
 
 
 def _sub_dict(sub: models.ICalSubscription) -> dict:
@@ -38,6 +39,7 @@ def _sub_dict(sub: models.ICalSubscription) -> dict:
         "url": sub.url,
         "color": sub.color,
         "enabled": sub.enabled,
+        "reminders_enabled": bool(sub.reminders_enabled),
         "refresh_minutes": sub.refresh_minutes,
         "last_fetched": sub.last_fetched.isoformat() if sub.last_fetched else None,
     }
@@ -215,6 +217,8 @@ def update_subscription(
         sub.enabled = data.enabled
     if data.refresh_minutes is not None:
         sub.refresh_minutes = data.refresh_minutes
+    if data.reminders_enabled is not None:
+        sub.reminders_enabled = data.reminders_enabled
     db.commit()
     return {"ok": True}
 

backend/routers/local_router.py

@@ -30,6 +30,7 @@ class CalendarUpdate(BaseModel):
     name: Optional[str] = None
     color: Optional[str] = None
     enabled: Optional[bool] = None
+    reminders_enabled: Optional[bool] = None
 
 
 class EventCreate(BaseModel):
@@ -72,6 +73,7 @@ def _cal_dict(cal: models.LocalCalendar, *, owned: bool = True,
         "name": cal.name,
         "color": cal.color,
         "enabled": cal.enabled,
+        "reminders_enabled": bool(cal.reminders_enabled),
         "type": "local",
         "owned": owned,
     }
@@ -199,6 +201,8 @@ def update_calendar(
         cal.color = data.color
     if data.enabled is not None:
         cal.enabled = data.enabled
+    if data.reminders_enabled is not None:
+        cal.reminders_enabled = data.reminders_enabled
     db.commit()
     return {"ok": True}