feat(translations): add "Help translate" link to the Weblate engage page

Invite community translations: a new Settings > Help translate row (next to
App language) opens the project's Weblate engage page, plus a Translations
section in the README. Documented in the 2.11.0 changelog.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/src/main/java/de/jeanlucmakiola/calendula/ui/settings/SettingsScreen.kt

@@ -48,6 +48,7 @@ import androidx.compose.material.icons.filled.Gavel
 import androidx.compose.material.icons.filled.Language
 import androidx.compose.material.icons.filled.Notifications
 import androidx.compose.material.icons.filled.Palette
+import androidx.compose.material.icons.filled.Translate
 import androidx.compose.material.icons.filled.Tune
 import androidx.compose.material3.FilledTonalButton
 import androidx.compose.material3.Icon
@@ -223,6 +224,7 @@ private fun SettingsHub(
             onClick = onManageCalendars,
         )
         LanguageRow(position = Position.Middle)
+        HelpTranslateRow(position = Position.Middle)
         // One-tap add of the "New event" Quick Settings tile. The system prompt
         // is API 33+; on older versions the tile is still addable manually from
         // the QS editor, so the row simply doesn't appear here.
@@ -288,6 +290,20 @@ private fun QuickSettingsTileRow(position: Position) {
     )
 }
 
+/** Opens the project's Weblate engage page so users can contribute translations. */
+@Composable
+private fun HelpTranslateRow(position: Position) {
+    val context = LocalContext.current
+    val url = stringResource(R.string.about_translate_url)
+    GroupedRow(
+        title = stringResource(R.string.settings_translate),
+        summary = stringResource(R.string.settings_translate_hint),
+        position = position,
+        leading = { CategoryIcon(Icons.Default.Translate, ChipAccent.Neutral) },
+        onClick = { openUrl(context, url) },
+    )
+}
+
 @Composable
 private fun LanguageRow(position: Position) {
     val context = LocalContext.current