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/crop.md

@@ -1,11 +1,11 @@
 ---
 description: "位置と寸法で領域を指定して画像を切り抜きます。"
-i18n_source_hash: aab38ccd7c53
+i18n_source_hash: 556f37893553
 i18n_provenance: human
 i18n_output_hash: fd35830e0f75
 ---
 
-# 切り抜き {#crop}
+# 画像クロップ {#crop}
 
 位置とサイズで矩形領域を定義して画像を切り抜きます。ピクセルとパーセンテージの両方の単位に対応します。