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Torlando
8ed9551a02
refresh() did heavy unnecessary work per conversation, on the LVGL
render task under the render lock:
- get_messages_for_conversation() copied the full 256-slot hash array
(8KB) just to read the newest hash (messages.back());
- load_message() on that hash read the payload file ~3x, JSON-parsed
it twice (including the large hex 'packed' blob), hex-decoded and
msgpack-unpacked the whole message — to extract a 30-char preview
and a timestamp;
- the unread badge was rendered from a hardwired 0 even though the
store maintains and persists unread_count.
Now:
- newest hash via the new O(1) MessageStore::get_last_message_hash
(index tail — always hot-tier, no I/O, no array copy);
- preview/timestamp via load_message_metadata (single open + filtered
parse, the fast path ChatScreen already uses for the same fields);
- unread badge from MessageStore::get_conversation_unread_count;
- badge cleared + mark-read on open (click) and when a message lands
in the currently-viewed chat, with the LittleFS index commit
deferred out of the LVGL lock (UIManager::update), matching the
existing deferred display-name write-through pattern.
Pins microLXMF 59ca70a (PR #10, temporary branch head) for the two new
accessors.