pe1hvh 4b338861aa feat: add local JSON cache for instant startup and offline resilience ...

- New: services/cache.py — DeviceCache stores device info, contacts,
  channel keys per BLE address in ~/.meshcore-gui/cache/
- Changed: ble/worker.py — cache-first startup flow, background BLE
  refresh, periodic contact refresh (every 5 min)
- Changed: config.py — added CONTACT_REFRESH_SECONDS setting
- GUI renders immediately from cached data; BLE updates in background
- Contacts are merged (new/changed from device, offline nodes preserved)
- Channel decryption keys cached for instant packet decoding on restart

2026-02-05 22:48:05 +01:00

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