feat(finance): manage token plans and simplify recharge checkout

backend/app/api/endpoints/finance.py

@@ -29,6 +29,30 @@ def summary():
         db.close()
 
 
+@router.get("/plans")
+def token_plans():
+    db = _session()
+    try:
+        return ApiResponse(data=finance_service.list_token_plans(db))
+    finally:
+        db.close()
+
+
+@router.patch("/plans/{plan_id}")
+def update_token_plan(plan_id: str, body: dict = Body(...)):
+    db = _session()
+    try:
+        finance_service.update_token_plan(
+            db, plan_id, amount=int(body.get("amount") or 0), price=float(body.get("price") or 0),
+            name=str(body.get("name") or ""), badge=str(body.get("badge") or ""), desc=str(body.get("desc") or ""),
+        )
+        return ApiResponse(message="充值套餐已更新")
+    except (ValueError, FinanceServiceError) as exc:
+        _raise(exc if isinstance(exc, FinanceServiceError) else FinanceServiceError("积分和价格格式不正确"))
+    finally:
+        db.close()
+
+
 @router.get("/orders")
 def orders(
     page: int = Query(1, ge=1),