Retires Support/donation/tiers page in favor of simple configurable link

backend/app/schemas.py

@@ -51,35 +51,6 @@ class EventResponse(BaseModel):
     model_config = {"from_attributes": True}
 
 
-# ── DonationTier ─────────────────────────────────────────
-
-class TierCreate(BaseModel):
-    name: str
-    amount: float
-    icon: str
-    benefits: list[str]
-    display_order: int
-
-
-class TierUpdate(BaseModel):
-    name: Optional[str] = None
-    amount: Optional[float] = None
-    icon: Optional[str] = None
-    benefits: Optional[list[str]] = None
-    display_order: Optional[int] = None
-
-
-class TierResponse(BaseModel):
-    id: int
-    name: str
-    amount: float
-    icon: str
-    benefits: list[str]
-    display_order: int
-
-    model_config = {"from_attributes": True}
-
-
 # ── StationConfig ─────────────────────────────────────────
 
 class StationConfigResponse(BaseModel):
@@ -101,6 +72,7 @@ class StationConfigResponse(BaseModel):
     phone: str
     email: str
     website: str
+    donation_url: str
 
     model_config = {"from_attributes": True}
 
@@ -122,6 +94,7 @@ class StationConfigUpdate(BaseModel):
     phone: Optional[str] = None
     email: Optional[str] = None
     website: Optional[str] = None
+    donation_url: Optional[str] = None
 
 
 # ── HistoryEntry ──────────────────────────────────────────