27a38366c3
- Add SensorReading model with CO2, temperature, humidity, window state, timestamp - Add RoomService and SensorService with HTTP calls and mock data fallback - Rewrite RoomMapComponent: SVG floor plan, CO2-based coloring, tooltips, navigation - Rewrite RoomDetailsPanelComponent: sensor history table with pagination (8 rows/page) - Add FooterComponent with current year, fix header/footer sticky layout - Update LegendComponent template and styles for two-line item layout - Add provideHttpClient() to app.config.ts - Add getCO2Color() and getCO2Level() helpers to co2-levels.config.ts - Add 85 unit tests across all components, services, and config helpers Closes #28 Closes #29