feat: Z-Park branding, data collection fix, buyoff pass (v1.3.0)

Branding:
- Replace all Tianpu text/colors with Z-Park (green #52c41a)
- Update login, sidebar, BigScreen, localStorage keys

Data collection:
- Populate ps_id for all 10 inverters (Phase1: 2226182, Phase2: 2226188)
- Fix docker-compose volume mount for customer config.yaml

Buyoff warning fixes:
- Installed capacity: 2200 kW / 10 Sungrow inverters (was wrong Huawei data)
- Feature flags: hide charging menu when features.charging=false
- Device total count: compute client-side from stats
- Device groups: enrich group names from metadata

Buyoff result: CONDITIONAL PASS (21/21 critical, 54/63 total)
Data accuracy: <3% deviation from iSolarCloud reference

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

frontend/src/pages/Dashboard/components/PowerGeneration.tsx

@@ -10,7 +10,7 @@ interface Props {
 
 export default function PowerGeneration({ realtime, energyToday }: Props) {
   const pvPower = realtime?.pv_power || 0;
-  const ratedPower = 375.035; // 总装机容量 kW
+  const ratedPower = 2200; // 总装机容量 kW (10台阳光电源逆变器)
   const utilization = ratedPower > 0 ? (pvPower / ratedPower) * 100 : 0;
   const generation = energyToday?.generation || 0;
   const selfUseRate = energyToday && energyToday.generation > 0
@@ -37,7 +37,7 @@ export default function PowerGeneration({ realtime, energyToday }: Props) {
       </div>
       <div style={{ marginTop: 8 }}>
         <Text type="secondary" style={{ fontSize: 12 }}>
-          装机容量: {ratedPower} kW | 3台华为SUN2000-110KTL-M0
+          装机容量: {ratedPower} kW | 10台阳光电源组串式逆变器
         </Text>
       </div>
     </div>