feat: add setting to keep connection alive in background (#1196)

app/src/main/java/com/m57/hermescontrol/ui/settings/SettingsScreen.kt

@@ -114,7 +114,9 @@ fun SettingsScreen(
                             icon = Icons.Filled.Tune,
                             label = stringResource(R.string.settings_sec_behavior),
                             summary =
-                                if (state.autoReconnect || state.restoreLastSession) {
+                                if (state.autoReconnect || state.restoreLastSession ||
+                                    state.keepConnectedInBackground
+                                ) {
                                     stringResource(R.string.settings_summary_on)
                                 } else {
                                     stringResource(R.string.settings_summary_off)

app/src/main/java/com/m57/hermescontrol/ui/settings/SettingsSubPages.kt

@@ -237,6 +237,8 @@ internal fun SettingsBehaviorPage(
             BehaviorSection(
                 autoReconnect = state.autoReconnect,
                 onAutoReconnectChange = viewModel::onAutoReconnectChange,
+                keepConnectedInBackground = state.keepConnectedInBackground,
+                onKeepConnectedInBackgroundChange = viewModel::onKeepConnectedInBackgroundChange,
                 restoreLastSession = state.restoreLastSession,
                 onRestoreLastSessionChange = viewModel::onRestoreLastSessionChange,
             )

app/src/main/java/com/m57/hermescontrol/ui/settings/SettingsViewModel.kt

@@ -44,6 +44,7 @@ data class SettingsUiState(
     val showAssistantMessageTokens: Boolean = true,
     val showTokensPerSecond: Boolean = true,
     val showModelProvider: Boolean = false,
+    val keepConnectedInBackground: Boolean = false,
     val profiles: List<ConnectionProfile> = emptyList(),
     val selectedProfileId: String? = null,
     val renameProfileName: String = "",
@@ -91,6 +92,7 @@ class SettingsViewModel(
         val showAssistantMessageTokens = AuthManager.isAssistantMessageTokensEnabled()
         val showTokensPerSecond = AuthManager.isTokensPerSecondEnabled()
         val showModelProvider = AuthManager.isModelProviderShown()
+        val keepConnectedInBackground = AuthManager.isKeepConnectedInBackground()
         val profiles = AuthManager.getConnectionProfiles()
         val appLanguage = AuthManager.getAppLanguage()
         val renameProfileName =
@@ -117,6 +119,7 @@ class SettingsViewModel(
                 showAssistantMessageTokens = showAssistantMessageTokens,
                 showTokensPerSecond = showTokensPerSecond,
                 showModelProvider = showModelProvider,
+                keepConnectedInBackground = keepConnectedInBackground,
                 profiles = profiles,
                 selectedProfileId = selectedId,
                 renameProfileName = renameProfileName,
@@ -368,6 +371,11 @@ class SettingsViewModel(
         AuthManager.setModelProviderShown(enabled)
     }
 
+    fun onKeepConnectedInBackgroundChange(enabled: Boolean) {
+        _uiState.update { it.copy(keepConnectedInBackground = enabled) }
+        AuthManager.setKeepConnectedInBackground(enabled)
+    }
+
     /** Clear all auth credentials — logs out and returns to landing screen. */
     fun logout() {
         AuthManager.setToken(null)
@@ -402,6 +410,7 @@ class SettingsViewModel(
         AuthManager.setAssistantMessageTokensEnabled(state.showAssistantMessageTokens)
         AuthManager.setTokensPerSecondEnabled(state.showTokensPerSecond)
         AuthManager.setModelProviderShown(state.showModelProvider)
+        AuthManager.setKeepConnectedInBackground(state.keepConnectedInBackground)
         ApiClient.rebuild()
 
         viewModelScope.launch(ioDispatcher) {

app/src/main/java/com/m57/hermescontrol/ui/settings/components/BehaviorSection.kt

@@ -23,6 +23,8 @@ import com.m57.hermescontrol.ui.settings.SectionCard
 internal fun BehaviorSection(
     autoReconnect: Boolean,
     onAutoReconnectChange: (Boolean) -> Unit,
+    keepConnectedInBackground: Boolean,
+    onKeepConnectedInBackgroundChange: (Boolean) -> Unit,
     restoreLastSession: Boolean,
     onRestoreLastSessionChange: (Boolean) -> Unit,
 ) {
@@ -60,6 +62,39 @@ internal fun BehaviorSection(
         HorizontalDivider(color = MaterialTheme.colorScheme.outlineVariant)
         Spacer(modifier = Modifier.height(12.dp))
 
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Column(modifier = Modifier.weight(1f)) {
+                Text(
+                    text = stringResource(R.string.settings_keep_connected_in_background_title),
+                    style = MaterialTheme.typography.bodyLarge,
+                )
+                Text(
+                    text = stringResource(R.string.settings_keep_connected_in_background_desc),
+                    style =
+                        MaterialTheme.typography.bodySmall.copy(
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        ),
+                )
+            }
+            Switch(
+                checked = keepConnectedInBackground,
+                onCheckedChange = onKeepConnectedInBackgroundChange,
+                colors =
+                    SwitchDefaults.colors(
+                        checkedThumbColor = MaterialTheme.colorScheme.primary,
+                        checkedTrackColor = MaterialTheme.colorScheme.primaryContainer,
+                    ),
+            )
+        }
+
+        Spacer(modifier = Modifier.height(12.dp))
+        HorizontalDivider(color = MaterialTheme.colorScheme.outlineVariant)
+        Spacer(modifier = Modifier.height(12.dp))
+
         Row(
             modifier = Modifier.fillMaxWidth(),
             horizontalArrangement = Arrangement.SpaceBetween,