feat!: generic defaults, dashboard fallback, PV filter fix (v1.3.0)

- Replace all hardcoded Tianpu/天普 defaults with generic "EMS Platform"
- Add energy_today fallback: query raw energy_data when daily summary empty
- Fix PV device filter to include sungrow_inverter device type
- Update APP_NAME, CUSTOMER default, SECRET_KEY, SMTP, Celery, email templates

BREAKING: CUSTOMER default changed from "tianpu" to "default"
Existing deployments with CUSTOMER=tianpu in .env are unaffected.

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

backend/app/api/v1/dashboard.py

@@ -26,7 +26,7 @@ async def get_overview(db: AsyncSession = Depends(get_db), user: User = Depends(
     )
     device_stats = {row[0]: row[1] for row in device_stats_q.all()}
 
-    # 今日能耗汇总
+    # 今日能耗汇总 (from daily summary table)
     daily_q = await db.execute(
         select(
             EnergyDailySummary.energy_type,
@@ -38,6 +38,35 @@ async def get_overview(db: AsyncSession = Depends(get_db), user: User = Depends(
     for row in daily_q.all():
         energy_summary[row[0]] = {"consumption": row[1] or 0, "generation": row[2] or 0}
 
+    # Fallback: if daily summary is empty, compute from raw energy_data
+    if not energy_summary:
+        from sqlalchemy import distinct
+        fallback_q = await db.execute(
+            select(
+                func.sum(EnergyData.value),
+            ).where(
+                and_(
+                    EnergyData.timestamp >= today_start,
+                    EnergyData.data_type == "daily_energy",
+                )
+            ).group_by(EnergyData.device_id).order_by(EnergyData.device_id)
+        )
+        # Get the latest daily_energy per device (avoid double-counting)
+        latest_energy_q = await db.execute(
+            select(
+                EnergyData.device_id,
+                func.max(EnergyData.value).label("max_energy"),
+            ).where(
+                and_(
+                    EnergyData.timestamp >= today_start,
+                    EnergyData.data_type == "daily_energy",
+                )
+            ).group_by(EnergyData.device_id)
+        )
+        total_gen = sum(row[1] or 0 for row in latest_energy_q.all())
+        if total_gen > 0:
+            energy_summary["electricity"] = {"consumption": 0, "generation": round(total_gen, 2)}
+
     # 今日碳排放
     carbon_q = await db.execute(
         select(func.sum(CarbonEmission.emission), func.sum(CarbonEmission.reduction))
@@ -134,7 +163,10 @@ async def get_load_curve(
 
 async def _get_pv_device_ids(db: AsyncSession):
     result = await db.execute(
-        select(Device.id).where(Device.device_type == "pv_inverter", Device.is_active == True)
+        select(Device.id).where(
+            Device.device_type.in_(["pv_inverter", "sungrow_inverter"]),
+            Device.is_active == True,
+        )
     )
     return [r[0] for r in result.fetchall()]