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>

scripts/seed_maintenance.py

@@ -0,0 +1,67 @@
+"""Seed maintenance data: asset categories and sample spare parts."""
+import asyncio
+import sys
+import os
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "core", "backend"))
+
+from app.core.database import async_session_factory
+from app.models.maintenance import AssetCategory, SparePart
+
+
+ASSET_CATEGORIES = [
+    {"name": "光伏组件", "description": "太阳能电池板及组件"},
+    {"name": "逆变器", "description": "光伏逆变器设备"},
+    {"name": "汇流箱", "description": "直流汇流箱"},
+    {"name": "变压器", "description": "升压变压器"},
+    {"name": "电缆线路", "description": "直流/交流电缆"},
+    {"name": "监控设备", "description": "采集器、通信模块等"},
+    {"name": "配电设备", "description": "开关柜、断路器等"},
+    {"name": "支架结构", "description": "光伏支架及基础"},
+    {"name": "防雷接地", "description": "防雷及接地装置"},
+    {"name": "其他", "description": "其他辅助设备"},
+]
+
+SPARE_PARTS = [
+    {"name": "MC4连接器(公)", "part_code": "SP-MC4-M", "category": "光伏组件", "specification": "1000VDC/30A", "unit": "个", "current_stock": 50, "min_stock": 20, "unit_price": 3.5, "supplier": "正泰"},
+    {"name": "MC4连接器(母)", "part_code": "SP-MC4-F", "category": "光伏组件", "specification": "1000VDC/30A", "unit": "个", "current_stock": 50, "min_stock": 20, "unit_price": 3.5, "supplier": "正泰"},
+    {"name": "光伏直流熔断器", "part_code": "SP-FUSE-DC", "category": "汇流箱", "specification": "15A/1000VDC", "unit": "个", "current_stock": 30, "min_stock": 10, "unit_price": 12.0, "supplier": "正泰"},
+    {"name": "防雷器SPD", "part_code": "SP-SPD-DC", "category": "防雷接地", "specification": "T2级/40kA", "unit": "个", "current_stock": 10, "min_stock": 5, "unit_price": 180.0, "supplier": "德力西"},
+    {"name": "光伏电缆PV1-F", "part_code": "SP-CABLE-4", "category": "电缆线路", "specification": "4mm²/黑色", "unit": "米", "current_stock": 200, "min_stock": 50, "unit_price": 4.8, "supplier": "远东电缆"},
+    {"name": "4G通信模块", "part_code": "SP-4G-MOD", "category": "监控设备", "specification": "全网通/LORA", "unit": "个", "current_stock": 5, "min_stock": 2, "unit_price": 320.0, "supplier": "协合智能"},
+    {"name": "SIM卡", "part_code": "SP-SIM", "category": "监控设备", "specification": "物联网卡/3年", "unit": "张", "current_stock": 10, "min_stock": 3, "unit_price": 80.0, "supplier": "中国移动"},
+    {"name": "交流断路器", "part_code": "SP-ACB-63", "category": "配电设备", "specification": "63A/3P", "unit": "个", "current_stock": 5, "min_stock": 2, "unit_price": 85.0, "supplier": "正泰"},
+    {"name": "电能表", "part_code": "SP-METER-3P", "category": "监控设备", "specification": "三相/RS485", "unit": "台", "current_stock": 3, "min_stock": 1, "unit_price": 450.0, "supplier": "安科瑞"},
+    {"name": "不锈钢扎带", "part_code": "SP-TIE-SS", "category": "其他", "specification": "4.6×300mm", "unit": "包", "current_stock": 20, "min_stock": 5, "unit_price": 15.0, "supplier": "华达"},
+]
+
+
+async def seed():
+    async with async_session_factory() as session:
+        # Seed categories
+        from sqlalchemy import select
+        existing = (await session.execute(select(AssetCategory))).scalars().all()
+        if existing:
+            print(f"Asset categories already exist ({len(existing)} found), skipping...")
+        else:
+            for cat in ASSET_CATEGORIES:
+                session.add(AssetCategory(**cat))
+            await session.flush()
+            print(f"Seeded {len(ASSET_CATEGORIES)} asset categories")
+
+        # Seed spare parts
+        existing_parts = (await session.execute(select(SparePart))).scalars().all()
+        if existing_parts:
+            print(f"Spare parts already exist ({len(existing_parts)} found), skipping...")
+        else:
+            for part in SPARE_PARTS:
+                session.add(SparePart(**part))
+            await session.flush()
+            print(f"Seeded {len(SPARE_PARTS)} spare parts")
+
+        await session.commit()
+        print("Done!")
+
+
+if __name__ == "__main__":
+    asyncio.run(seed())