IRIS PROMPT STUDIO V2.6.26 — UI / BODY MAP QUALITY PATCH
Base: V2.6.25

1. Head tilt: add dedicated reset button (0 degrees). Keep other joints and part-specific pose choices.
2. Pose editor: correct misordered children in 2-column grid. Move head-tilt slider and controls above the grid; part-specific options sit beside the silhouette.
3. Remove per-section visible version labels. Add changelog.html (header link: 업데이트 내역) for version history.
4. Separate hand-dorsum vs palm selection geometry (all 5 fingers per side + wrist/hand). The dorsal thumb is closer to the center than the palm thumb. Preserve existing region IDs.
5. Rename front_center_head from 이마·얼굴 중앙 to 이마 중앙, adjust its selection box to the forehead.
6. Introduce face_center_forehead as an independent forehead-center selection region, while retaining the old front_center_head ID for stored data.
7. Remove 5 redundant zoom preset buttons (상체, 다리, 손, 발, 선택 확대). Keep +, -, full view, mousewheel, pan.

Compatibility: original local storage key and skin/tattoo IDs preserved. New face_center_forehead adds one zone; no data migration needed.