SDArchiveFileSystem.h: guard release_bus() in FileImpl::close() on
the acquire_bus return value, matching the pattern every other
method already uses. Previously close() (which is also called from
~FileImpl) issued an unconditional xSemaphoreGive even when
acquire_bus(500) timed out, skewing the SPI bus mutex counter on
each over-release.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds Hardware::TDeck::SDArchiveFileSystem — a microStore::FileSystem
adapter that piggybacks on the SD card already mounted by SDAccess::init
and serializes every operation through the shared SPI bus mutex (so it
cooperates with display + LoRa traffic on HSPI).
In setup_lxmf, after MessageStore is constructed, attach the SD as the
archive tier at "/lxmf-archive". When the SD is missing the message
store falls back to delete-on-cull (still bounded, just no historical
scrollback). Without this the LittleFS partition (1.875MB) fills in
~30 min of sustained receive and trips lfs_alloc divide-by-zero.
Also moves the LVGL_LOCK in UIManager::on_message_received to AFTER
the save_message call. The 5s LVGL lock timeout was tripping when
LittleFS compaction stalled the save for several seconds, panicking
the loop watchdog.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
