BLE Fix:
- Check if sensor is already connected to target WiFi before sending credentials
- Handle W|fail when sensor uses saved credentials instead of new password
- Return success if sensor is connected to target network even after W|fail
Build Version Indicator:
- Add visible version badge on Dashboard screen (v2.1.0 • 2026-01-27 17:05)
- Green text on dark background in bottom-right corner
- Helps verify which build is running on device
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Co-Authored-By: Claude <noreply@anthropic.com>