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/zh-CN/tools/image/convert.md

@@ -1,11 +1,11 @@
 ---
 description: "在各种格式之间转换图片，包括 AVIF、JXL 和 HEIC 等现代格式。"
-i18n_source_hash: 562f8270e8c3
+i18n_source_hash: 2639f333073f
 i18n_provenance: human
 i18n_output_hash: 238017f07183
 ---
 
-# 转换 {#convert}
+# 转换图片 {#convert}
 
 在各种格式之间转换图片。支持常见的网页格式，以及 HEIC、JXL、BMP、ICO、JP2、QOI 和 PSD 等专业格式。