feat: clearer, disambiguated tool names across all surfaces (#520)

Renames 18 ambiguous or hard-to-search tool names so image tools self-qualify like the other modalities ("Compress" becomes "Compress Image"), and cleans up a few awkward names. Propagated across search (constants.ts), display (en.ts + 20 locales), the OpenAPI base spec + 20 locale specs, and the docs tool-page headings in 21 languages. Removes the duplicate "Normalize Audio" summary shared by the video and audio endpoints. Tool ids and routes are unchanged, so no API paths or bookmarks break.

apps/docs/ko/tools/image/convert.md

@@ -1,11 +1,11 @@
 ---
 description: "AVIF, JXL, HEIC와 같은 최신 형식을 포함하여 이미지를 형식 간에 변환합니다."
-i18n_source_hash: 562f8270e8c3
+i18n_source_hash: 2639f333073f
 i18n_provenance: human
 i18n_output_hash: 4d24e322a7ac
 ---
 
-# 변환 {#convert}
+# 이미지 변환 {#convert}
 
 이미지를 형식 간에 변환합니다. 일반적인 웹 형식은 물론 HEIC, JXL, BMP, ICO, JP2, QOI, PSD와 같은 특수 형식도 지원합니다.