Adds a small `:translate` Gradle module that translates received SMS /
MMS bubbles and conversation-list snippets on the fly by binding to the
offline-translator app on F-Droid (`dev.davidv.translator`). The actual
translation runs there — Mozilla Bergamot/Marian on-device — so this
patch ships no model, no inference, and no permissions beyond an
Android 11+ <queries> block for package visibility.
Behavior:
- User-defined source-language allowlist + target language in
Settings → Translation (right after Language). Off by default.
- Auto-translate fires on RecyclerView bind for received bubbles and
conversation snippets. Detection uses ML Kit Language Identification
(CLD3, on-device). Once dev.davidv.translator exposes a
detectLanguage() AIDL method we'll route through that and drop ML Kit.
- AIDL latency is sub-second, so the bubble just quietly swaps from
the original to the translation — no loading spinner.
- Tap the translate icon next to a bubble to flip it back to the
original; tap again to flip to the translation. Cached in process
memory.
- Long-press → ⋮ → Translate forces a one-off translation regardless
of the allowlist (useful for messages in non-allowlisted languages),
with a toast surfacing AIDL errors like 'language pack not installed'.
- Copy / Share / Select on a translated bubble captures what the user
sees, not the underlying source body.
- Silently no-ops when offline-translator isn't installed; settings
screen shows an F-Droid install banner.
- Translation Settings is a regular Fossify sub-screen with
MyAppBarLayout + MaterialToolbar + NestedScrollView, matching
Manage Blocked Numbers / Keywords / SettingsActivity.
No new database, no service, no boot receiver, no foreground service.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Jeena
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