New dashboard KPI cards:
- Performance Ratio (PR) with color thresholds
- Equivalent Utilization Hours
- Daily Revenue (¥)
- Self-Consumption Rate
Version display for field engineers:
- Login page footer: "v1.4.0 | Core: v1.4.0"
- Sidebar footer: version when expanded
- System Settings: full version breakdown
Backend (core sync):
- GET /api/v1/version (no auth) — reads VERSIONS.json
- GET /api/v1/kpi/solar — PR, revenue, equiv hours calculations
- Dashboard energy_today fallback from raw energy_data
- PV device filter includes sungrow_inverter type
Feature flags:
- Sidebar hides disabled features (charging, bigscreen_3d)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
