* fix: skip Korean from CJK font-codepoint-map auto-injection
The automatic CJK font-codepoint-map injection (PR #1017) maps Korean
ranges to Apple SD Gothic Neo, which has a different style/weight from
the primary terminal font. This overrides Ghostty's native
CTFontCreateForString fallback, which dynamically selects a
better-matching font for Hangul.
Ghostty itself (ghostty-org/ghostty) has no hardcoded CJK font names
and relies entirely on CTFontCreateForString for fallback. For Korean,
this native fallback produces visually consistent results with the
primary font.
Remove the Korean branch from cjkFontMappings() so Ghostty's native
fallback handles Hangul rendering. Japanese and Chinese mappings are
unaffected.
* test: update CJK font mapping tests for Korean removal
- testCJKFontMappingsReturnsAppleSDGothicNeoWithHangulForKorean
→ renamed to testCJKFontMappingsReturnsNilForKoreanOnly
→ asserts nil since Korean is no longer auto-mapped
- testCJKFontMappingsMultiLanguageMapsScriptSpecificRanges
→ renamed to testCJKFontMappingsMultiLanguageSkipsKorean
→ asserts no Apple SD Gothic Neo mapping exists
→ Japanese mappings remain unchanged
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Co-authored-by: dante-ad-shield <danate@ad-shield.io>
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