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/pdf/nup-pdf.md

@@ -1,11 +1,11 @@
 ---
 description: "在每張紙上排列多個 PDF 頁面（2 合 1、4 合 1 等）。"
-i18n_source_hash: 9dd82737cb72
+i18n_source_hash: 972bf997c95c
 i18n_provenance: human
 i18n_output_hash: 92b5b8e56c3d
 ---
 
-# N 合 1 PDF {#n-up-pdf}
+# 每張紙頁數 (N-up) {#n-up-pdf}
 
 在每張紙上排列多個頁面以在列印時節省紙張，例如 2 合 1 或 4 合 1 版面配置。
 

apps/docs/zh-TW/tools/pdf/pdfa-convert.md

@@ -1,11 +1,11 @@
 ---
 description: "將 PDF 轉換為封存用的 PDF/A-2 格式以供長期保存。"
-i18n_source_hash: 4c6bf7a12e84
+i18n_source_hash: 9c568a340b6f
 i18n_provenance: human
 i18n_output_hash: 3dbdd411b552
 ---
 
-# PDF/A 轉換 {#pdf-a-convert}
+# PDF/A 轉換器 {#pdf-a-convert}
 
 將 PDF 轉換為 PDF/A-2 封存格式，適用於長期保存與法規遵循。