fix: catalog every ported web string in all locales; drop tests of unported STB parsing

- Translate the strings the #1717 port cataloged in English only
  (CSV picker, plot-preview task, extraction cap, shared-copy warning)
  for every locale, and the whole ported web set for lo-LA, which the
  contributor branch predates.
- hu-HU carried twelve keys twice after the port's merge; keep main's.
- The STB container/refusal tests exercised parsing this port did not
  bring over; the preview-clamp test now only pins the upper bound, since
  main's raster path already clamps preview pages further.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/scene/model/pdf_raster.rs

@@ -595,7 +595,7 @@ mod tests {
         let (pages, total) = rasterize_preview_pages(bytes, 150.0, 12);
         assert_eq!((total, pages.len()), (1, 1));
         assert!(pages[0].width <= 4096 && pages[0].height <= 4096);
-        assert!(pages[0].width >= 4000 && pages[0].height >= 4000);
+        assert!(pages[0].width > 0 && pages[0].height > 0);
         let pixels = pages[0].width as f64 * pages[0].height as f64;
         assert!(pixels <= 4096.0 * 4096.0, "clamped, not {pixels} px");
     }