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>

VERSIONS.json

@@ -1,9 +1,9 @@
 {
   "project": "zpark-ems",
-  "project_version": "1.2.0",
-  "customer": "Z-Park 中关村科技园",
+  "project_version": "1.3.0",
+  "customer": "Z-Park 中关村医疗器械园",
   "core_version": "1.1.0",
   "frontend_template_version": "1.1.0",
   "last_updated": "2026-04-06",
-  "notes": "Customer frontend, Sungrow collector fixes, real data"
+  "notes": "Z-Park branding, ps_id fix, feature flags, buyoff CONDITIONAL PASS"
 }