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/nl/tools/pdf/nup-pdf.md

@@ -1,11 +1,11 @@
 ---
 description: "Rangschik meerdere PDF-pagina's per vel (2-up, 4-up, enz.)."
-i18n_source_hash: 9dd82737cb72
+i18n_source_hash: 972bf997c95c
 i18n_provenance: human
 i18n_output_hash: 0bc3216f7107
 ---
 
-# N-up PDF {#n-up-pdf}
+# Pagina's per vel (N-up) {#n-up-pdf}
 
 Rangschik meerdere pagina's per vel om papier te besparen bij het afdrukken, zoals 2-up- of 4-up-indelingen.
 

apps/docs/nl/tools/pdf/pdfa-convert.md

@@ -1,11 +1,11 @@
 ---
 description: "Converteer een PDF naar het archief-PDF/A-2-formaat voor langdurige bewaring."
-i18n_source_hash: 4c6bf7a12e84
+i18n_source_hash: 9c568a340b6f
 i18n_provenance: human
 i18n_output_hash: 75010fc5a155
 ---
 
-# PDF/A Convert {#pdf-a-convert}
+# PDF/A-converter {#pdf-a-convert}
 
 Converteer een PDF naar het PDF/A-2-archiefformaat, geschikt voor langdurige bewaring en naleving van regelgeving.