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agessaman
f3c81b559b
`set display.flip 0|1` (also off/on) turns the panel 180 degrees from its compiled DISPLAY_ROTATION, persisted in MQTTPrefs alongside display.timeout and applied live without a reboot. Adding 2 to the compiled rotation rather than setting an absolute value keeps portrait portrait and landscape landscape, so the DisplayViewport geometry never changes with it and the setting cannot produce a nonsensical mix. DisplayDriver gains a defaulted no-op setFlipped(), so no other display driver is affected. The compiled rotation was verified identical across `pio run` and `build.sh` on two machines (movi a11, 2 at the setRotation call site), yet the panel read upside down for one tester and upright for another - which is what a board mounted either way up looks like. No single compiled constant satisfies both, so orientation becomes a setting rather than another rebuild. Runtime-only, like display_timeout_secs: LegacyV1MQTTPrefs and the frozen binary payload sizes are untouched, and the JSON group is an append that older firmware skips.