i18n(ja): apply review round 1

Three-model review (astra, sol, Fable), round 1:
- Meaning fixes: post-tropical cyclone, partly cloudy, upload-date basis,
  ground track (対地針路), spec FOV, voice credentials, Activate → 押す,
  bikeshare counts, NHC/CPHC empty state, absence caveat, regional-news
  empty state, route steps (件の案内), minimum fuel, microphone access.
- Consistent terms: 範囲 for WINDOW, カバー範囲 for coverage, 封じ込め率
  for fire containment, サイクロン for storms, 交通流 for TomTom flow,
  シグナル tab, インポート / エクスポート for projects and presets,
  射撃場 for the RANGE class, か所 for sites, full-width colons.
- Short forms where the re-shoot showed a wrap: エクスポート (Scenes),
  提供元で操作 (embeds), 該当施設 (Contacts).
- cjk.css: the Recent Imagery slot line wraps at its separators in
  Japanese, never inside プレビュー.
- Glossary in docs/translations/ja.md updated to match.

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

src/ui/styles/cjk.css

@@ -62,3 +62,10 @@ html:is(:lang(zh), :lang(ja)) .recent-imagery-readout .ri-card-sensor {
   white-space: normal;
   text-overflow: clip;
 }
+
+/* The Japanese imagery slot line wraps at its · separators, never inside a
+   word (プレ / ビュー); a run too long for the line still breaks. */
+html:lang(ja) .recent-imagery-readout .ri-slot-value {
+  word-break: keep-all;
+  overflow-wrap: break-word;
+}