i18n(ja): apply review round 3

Catalog fixes from the third review round: booster flight count
({count}回目の飛行), 晴れ for PARTLY CLOUDY, 配信元 for upstream,
部分的 for the PARTIAL feed state, または between provider names,
POS kept as a HUD code, product names in their own case (YouTube,
Facebook, Radio Browser, ChatGPT OAuth, Googleストリートビュー), Esc,
bracketed button names, en-dash ranges, 土砂ダム湖 for both lake
labels and smaller wording fixes. Guide: range rule and new glossary
rows.

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

src/i18n/same-as-english.json

@@ -150,6 +150,7 @@
     "Landsat 8/9",
     "MSG/S",
     "NVG",
+    "POS: {time}Z",
     "REC",
     "S2 GhostMaps",
     "SRC {value}",