Removes the experimental Sound/beep feature after hardware testing revealed unfixable electrical interference noise synced to the radar-sweep SPI traffic. Adds progress-dot feedback on the Settings Backup/Restore buttons so they no longer look frozen during the SD copy. Chains three independent free flight-route lookup sources instead of relying on adsbdb.com alone, which had poor real-world coverage (~80% "unknown"). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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1.2 MiB