Translations: catalogs and Android i18n lag the sources

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What is behind

Running gjsify workspace @learn6502/translations build on a clean main produces changes nobody has committed:

• The POT gains 4 msgids — Dino Run, Line Buster 6502, The offline browser run game made for 5602 assembly, Break the blocks with the paddle and ball. They came in with Examples: add line-buster-6502 (from issue #171) #174 and Examples: add dino-run (from issue #169) #175 (dino-run, line-buster-6502) and were never extracted, so no translator has seen them and every language shows them in English.
• Three Android catalogs are generated but untracked: packages/app-android/app/i18n/pt_BR.json, ta.json, zh_Hans.json. The .po files for those languages exist and are translated; the Android app just never received them, because the generated JSON was not committed. The other sixteen are tracked.
• packages/translations/LINGUAS is rewritten on every build purely to strip its trailing newline, so any build dirties the tree by one byte.

Why it is not in #178

#178 fixes the build pipeline. Regenerating would rewrite the POT, all sixteen .po files and the sixteen-plus-three Android JSONs as a side effect, and a mechanical 20-file regeneration inside a pipeline fix hides both.

What to do

1. Fix the source-language typo 5602 (should be 6502) in the line-buster description in packages/examples, so translators never see it.
2. Run gjsify workspace @learn6502/translations build on a clean tree and commit the result as one regeneration commit.
3. Add the three missing app-android/app/i18n/*.json.
4. Decide whether LINGUAS should keep its trailing newline or be committed without one, so the build stops dirtying it.