Frame rate: full-width PSRAM draw band (6 bands a frame instead of 14 on the
T-Deck), the still aurora drawn once and copied, LVGL at -O2 with its blend and
label loops in IRAM (scripts/build/perf_lvgl.py, 1 KB more loop stack), circle
and gradient caches, newlib memcpy. Rolled out to the M9, Attaky, RAK, Wio,
CrowPanel and V4-R8; the Pager gets the band only, the V4 the caches only.
Frame benchmark tour (DOC_PERF_BENCH) for measuring it.
Fixes: hop counts read from the packed path length (#621); Arabic shaping
rows patched in LVGL (patch_lvgl_arabic.py), Arabic 101 shift layer, kaf,
symbols, text sent as standard letters (#582); info popup colour runs that
never wrap (#602); keypad nav reaches the chat header (#623); the browser
opens the changelog (#622, gen-changelog.py at every site deploy); the
Theme background colour picker no longer edits the accent; flasher entries
for P4 units with factory ESP-AT Wi-Fi chips (#612, #619).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
