[hopskipnfall]

Summary

1. Pikachu Up Tilt Tail Animation (0x0c7):

   • Implemented dynamic overhead tail whip animation for Pikachu's Up Tilt when the Animation toggle is enabled (in both the Match View debug panel and Character Preview).
   • Tail rotation follows a fluid 27-frame eased arc (PIKACHU_UTIL_SWING_ANGLES_DEG): anticipation dip -> acceleration -> overhead whip crack (~+115 deg) on active hitbox frames 8–11 -> smooth return to rest.
   • Tail elongation scales along its length according to exact bytecode scale data from FTPikachuAnimUTilt.c (PIKACHU_UTIL_TAIL_SCALE), reaching 1.5x at frame 10 and smoothly returning to 1.0x by frame 14.
   • Symmetrically mirrored when facing left or right.

2. Character Preview (/#/preview) Animation Toggle:

   • Added an Animation toggle button to the Frame Animation scrubber in the Character Preview controller.
   • State persists to localStorage ("rmgr-viewer-animation").
   • Added Pikachu's Up Tilt (0x0c7) to the state dropdown as visualized with its description.

3. Remove Jumpsquat Ground FX:

   • Removed the ground pressure rings, lateral dust puffs, arrows, and kinetic spark effects (drawJumpSquatFx) during jump squat (0x014 / 0x015), leaving only the character model's subtle squat compression.

4. Mario SpecialN (0xdf) Fireball Fix:

   • Fixed getMarioSpecialType to treat Mario's grounded 0xdf state as fireball (no coin / Up-B animation), showing the default avatar rather than Super Jump Punch coins.

Tests

• Added unit tests in src/characters/original/pikachuUtiltAnimation.test.ts (11 tests).
• Added unit tests in src/preview/characterPreview.test.ts for preview animation toggle.
• Updated src/renderer.test.ts.
• All tests pass (1439/1439 passed).
• TypeScript check (npm run typecheck) and Prettier (npm run format:check) pass cleanly.