UI-Verbesserungen: Favicon, Tab-Titel, Kalender umbenennen, Avatar-Crop, Farbpalette

- SVG-Favicon hinzugefügt
- Dynamischer Tab-Titel (z.B. "Calendarr - März 2026")
- Kalender per Doppelklick umbenennen (Backend + Frontend)
- Avatar-Anzeige im Topbar gefixt (onerror Fallback, robustes Laden)
- Avatar-Upload mit Cropper.js Bildausschnitt-Wahl
- Avatar-Limit auf 5 MB erhöht, Thumbnail auf 512px
- Farbpalette statt nativem Color-Picker für Kalenderfarben

backend/routers/caldav_router.py

@@ -27,6 +27,7 @@ class AccountCreate(BaseModel):
 class CalendarUpdate(BaseModel):
     enabled: Optional[bool] = None
     color: Optional[str] = None
+    name: Optional[str] = None
 
 
 class EventCreate(BaseModel):
@@ -221,6 +222,8 @@ def update_calendar(
         calendar.enabled = data.enabled
     if data.color is not None:
         calendar.color = data.color
+    if data.name is not None:
+        calendar.name = data.name
     db.commit()
     return {"ok": True}
 

backend/routers/profile_router.py

@@ -19,7 +19,7 @@ router = APIRouter()
 
 AVATAR_DIR = DATA_DIR / "avatars"
 AVATAR_DIR.mkdir(parents=True, exist_ok=True)
-MAX_AVATAR_SIZE = 2 * 1024 * 1024  # 2 MB
+MAX_AVATAR_SIZE = 5 * 1024 * 1024  # 5 MB
 ALLOWED_TYPES = {"image/jpeg", "image/png", "image/webp"}
 
 
@@ -78,12 +78,12 @@ async def upload_avatar(
 
     data = await file.read()
     if len(data) > MAX_AVATAR_SIZE:
-        raise HTTPException(400, "Datei zu groß (max. 2 MB)")
+        raise HTTPException(400, "Datei zu groß (max. 5 MB)")
 
     # Resize to 256x256
     img = Image.open(io.BytesIO(data))
     img = img.convert("RGB")
-    img.thumbnail((256, 256))
+    img.thumbnail((512, 512))
 
     filename = f"user_{current_user.id}.jpg"
     path = AVATAR_DIR / filename