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/ja/tools/image/rotate.md

@@ -1,11 +1,11 @@
 ---
 description: "任意の角度で画像を回転し、水平方向または垂直方向に反転します。"
-i18n_source_hash: af2581d7cd8d
+i18n_source_hash: c4ed5f7e270b
 i18n_provenance: human
 i18n_output_hash: f4f347d12e10
 ---
 
-# 回転・反転 {#rotate-flip}
+# 画像回転と反転 {#rotate-flip}
 
 画像を任意の角度で回転したり、水平方向または垂直方向に反転したりします。回転と反転の操作は 1 回のリクエストで組み合わせられます。