Ghostty with ime-preedit-style fix

Changes

Bug Fixes

• renderer: fix preedit cells accumulating on each frame
  • When the preedit row was not dirty (e.g., during cursor blink), preedit text would appear progressively bolder over time
  • Now only renders preedit cells when the row is being rebuilt

Features (from previous release)

• config: add ime-preedit-style option for IME preedit rendering
  • invert: renders with inverted colors (default, original behavior)
  • underline: renders with underline instead of color inversion

Full Changelog

ime-preedit-style...ime-preedit-fix