https://gitlab.synchro.net/main/sbbs/-/commit/136378ac726525e7c07f188c
Modified Files:
src/doors/termgfx/termgfx_termio.c termgfx_termio.h
Log Message:
termgfx: stats field, idle-on-top, CSI-S F4, clear-on-resize, mouse opt-out

Shared-layer changes, all additive APIs or internal fixes:

- termgfx_termio_set_stats_extra(): an optional door-owned token appended
to the Ctrl-S strip (syncrpg shows the game resolution). The strip is
byte-for-byte unchanged for doors that never set it.

- Draw the idle-disconnect countdown AFTER the frame image. It is split
out of termgfx_stats_draw() into termgfx_idle_draw(), called past the
image emit in both present paths and from the static-scene paints. The
JXL tier reserves no bottom row, so a height-constrained (e.g. 320x240)
game would otherwise hide the disconnect warning behind the picture.
The debug stats bar stays before the image and is suppressed while the
countdown owns the row.

- Decode F4 from CSI-S. Kitty and legacy keep F1/F2/F4 on the P/Q/S
finals, so F4 arrives as "CSI 1;<mods>S", which collided with the
XTSMGRAPHICS reply and was silently dropped -- Foot's F4 did nothing.
The reply's required '?' marker disambiguates them; with no marker,
dispatch F4. F3's 'R' stays ambiguous with CPR and is left to CSI 13~
or evdev.

- Erase the display on an image-rect change in the truecolor present
path. A frame that shrinks (a door cycling to a smaller resolution)
otherwise leaves the taller previous frame's bottom rows on screen.
One 2J per change, guarded, so there is no per-frame flicker.

- termgfx_termio_set_mouse(0): a keyboard-only door opt-out. It sends the
mouse DISABLE rather than enable, so motion tracking (mode 1003) no
longer streams hover reports that reset the idle clock (motion counts
as activity) for a door that never reads the mouse. Stray reports are
dropped outright as a backstop.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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