feat: v2.0 — maintenance module, AI analysis, station power fix

- Add full 检修维护中心 (6.4): 3-type work orders (消缺/巡检/抄表),
  asset management, warehouse, work plans, billing settlement
- Add AI智能分析 tab with LLM-powered diagnostics (StepFun + ZhipuAI)
- Add AI模型配置 settings page (provider, temperature, prompts)
- Fix station power accuracy: use API station total (station_power)
  instead of inverter-level computation — eliminates timing gaps
- Add 7 new DB models, 4 new API routers, 5 new frontend pages
- Migrations: 009 (maintenance expansion) + 010 (AI analysis)
- Version bump: 1.6.1 → 2.0.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

core/backend/app/api/v1/maintenance.py

@@ -48,6 +48,9 @@ class OrderCreate(BaseModel):
     alarm_event_id: int | None = None
     priority: str = "medium"
     cost_estimate: float | None = None
+    order_type: str = "repair"  # repair, inspection, meter_reading
+    station_name: str | None = None
+    due_date: str | None = None
 
 
 class OrderUpdate(BaseModel):
@@ -57,6 +60,8 @@ class OrderUpdate(BaseModel):
     status: str | None = None
     resolution: str | None = None
     actual_cost: float | None = None
+    order_type: str | None = None
+    station_name: str | None = None
 
 
 class DutyCreate(BaseModel):
@@ -104,6 +109,9 @@ def _order_to_dict(o: RepairOrder) -> dict:
         "assigned_at": str(o.assigned_at) if o.assigned_at else None,
         "completed_at": str(o.completed_at) if o.completed_at else None,
         "closed_at": str(o.closed_at) if o.closed_at else None,
+        "order_type": o.order_type,
+        "station_name": o.station_name,
+        "due_date": str(o.due_date) if o.due_date else None,
     }
 
 
@@ -116,9 +124,11 @@ def _duty_to_dict(d: DutySchedule) -> dict:
     }
 
 
-def _generate_order_code() -> str:
+def _generate_order_code(order_type: str = "repair") -> str:
     now = datetime.now(timezone.utc)
-    return f"WO-{now.strftime('%Y%m%d')}-{now.strftime('%H%M%S')}"
+    prefix_map = {"repair": "XQ", "inspection": "XJ", "meter_reading": "CB"}
+    prefix = prefix_map.get(order_type, "WO")
+    return f"{prefix}-{now.strftime('%Y%m%d')}-{now.strftime('%H%M%S')}"
 
 
 # ── Inspection Plans ────────────────────────────────────────────────
@@ -271,6 +281,7 @@ async def update_record(
 async def list_orders(
     status: str | None = None,
     priority: str | None = None,
+    order_type: str | None = None,
     page: int = Query(1, ge=1),
     page_size: int = Query(20, ge=1, le=100),
     db: AsyncSession = Depends(get_db),
@@ -281,6 +292,8 @@ async def list_orders(
         query = query.where(RepairOrder.status == status)
     if priority:
         query = query.where(RepairOrder.priority == priority)
+    if order_type:
+        query = query.where(RepairOrder.order_type == order_type)
 
     count_q = select(func.count()).select_from(query.subquery())
     total = (await db.execute(count_q)).scalar()
@@ -300,10 +313,12 @@ async def create_order(
     user: User = Depends(get_current_user),
 ):
     order = RepairOrder(
-        **data.model_dump(),
-        code=_generate_order_code(),
+        **data.model_dump(exclude={"due_date"}),
+        code=_generate_order_code(data.order_type),
         created_by=user.id,
     )
+    if data.due_date:
+        order.due_date = datetime.fromisoformat(data.due_date)
     db.add(order)
     await db.flush()
     return _order_to_dict(order)