Since #1959 a bar texture cuts its drawn rect only when its install set the texcoord-modifies-rect flag. The nameplate attached its fill by hand, never through that install, so the fill stayed full whatever the health.
1.12.1 builds the fill with the bar's own path verb: the plate setup calls `0x783140` with the fill's path on layer 2 (`0x7cb31a`-`0x7cb329`), which pins it to the bar and installs it through `0x7831f0`, the step that sets the flag (`0x783220`).
The plate now builds its fill through that same path leg, lifted into a model-level function, so it is installed, flagged and pinned like any bar texture. A test drives a plate at 40, 20 and 10 of 40 health and checks the drawn fill at full, half and a quarter width; it fails without the fix.
Fixes#1969🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Sam Sung
866e2cac31