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-TW/tools/image/rotate.md

@@ -1,11 +1,11 @@
 ---
 description: "將圖片旋轉任意角度並水平或垂直翻轉。"
-i18n_source_hash: af2581d7cd8d
+i18n_source_hash: c4ed5f7e270b
 i18n_provenance: human
 i18n_output_hash: 3946b7378b3f
 ---
 
-# 旋轉與翻轉 {#rotate-flip}
+# 旋轉與翻轉影像 {#rotate-flip}
 
 將圖片旋轉任意角度，以及／或水平或垂直翻轉。旋轉與翻轉操作可在單一請求中結合使用。