Implemented 200-character limit for messages due to LoRa/MeshCore constraints:
- Added maxlength=200 to textarea
- Added live character counter (0 / 200)
- Visual warnings: orange at 75%, red at 90%
- Counter updates on input, reply, and send
- Backend validation with descriptive error message
- Added technotes/limity.md documentation about MeshCore limits
Based on MeshCore LoRa payload constraints (~180-200 bytes safe limit).
This prevents message fragmentation and improves transmission reliability.
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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
MarekWo