feat: add setting to toggle model provider visibility in chat composer (#1194)

app/src/main/java/com/m57/hermescontrol/ui/chat/ChatScreen.kt

@@ -790,6 +790,7 @@ fun ChatScreen(
                 },
                 // Composer toolbar wiring (PR 1)
                 currentSessionModel = state.currentSessionModel,
+                showModelProvider = state.showModelProvider,
                 reasoningLevel = state.reasoningLevel,
                 onModelTap = { viewModel.openModelPicker() },
                 onReasoningTap = { level -> viewModel.setReasoningLevel(level) },

app/src/main/java/com/m57/hermescontrol/ui/chat/ChatViewModel.kt

@@ -118,6 +118,7 @@ data class ChatUiState(
     val showUserMessageTokens: Boolean = true,
     val showAssistantMessageTokens: Boolean = true,
     val showTokensPerSecond: Boolean = true,
+    val showModelProvider: Boolean = false,
     // Commands catalog
     val commandCatalog: CommandCatalog = CommandCatalog(),
     // Per-command usage counts for the slash-autocomplete ranking (issue
@@ -2605,6 +2606,7 @@ class ChatViewModel(
                 showUserMessageTokens = AuthManager.isUserMessageTokensEnabled(),
                 showAssistantMessageTokens = AuthManager.isAssistantMessageTokensEnabled(),
                 showTokensPerSecond = AuthManager.isTokensPerSecondEnabled(),
+                showModelProvider = AuthManager.isModelProviderShown(),
             )
         }
     }

app/src/main/java/com/m57/hermescontrol/ui/chat/components/ChatComposer.kt

@@ -100,6 +100,7 @@ fun ChatInputBar(
     fastSupported: Boolean = false,
     isFastModeChanging: Boolean = false,
     onToggleFastMode: () -> Unit = {},
+    showModelProvider: Boolean = false,
 ) {
     // Allow sending while the agent is mid-turn or awaiting approval: the
     // gateway's prompt.submit busy-input policy queues it as the next turn
@@ -327,6 +328,7 @@ fun ChatInputBar(
                     fastSupported = fastSupported,
                     isFastModeChanging = isFastModeChanging,
                     onToggleFastMode = onToggleFastMode,
+                    showModelProvider = showModelProvider,
                 )
 
                 AttachmentTray(

app/src/main/java/com/m57/hermescontrol/ui/chat/components/ComposerToolbar.kt

@@ -103,6 +103,7 @@ fun ComposerToolbar(
     fastSupported: Boolean = false,
     isFastModeChanging: Boolean = false,
     onToggleFastMode: () -> Unit = {},
+    showModelProvider: Boolean = false,
 ) {
     var showReasoningMenu by remember { mutableStateOf(false) }
     val palette = composerPalette()
@@ -135,7 +136,11 @@ fun ComposerToolbar(
         // Model + reasoning pill — wraps its content inside the free space,
         // pushing the mic/action buttons to the far end
         val modelScrollState = rememberScrollState()
-        LaunchedEffect(currentSessionModel) {
+        val modelLabel =
+            currentSessionModel?.let { model ->
+                composerModelLabel(model, showProvider = showModelProvider)
+            } ?: "Model"
+        LaunchedEffect(modelLabel) {
             modelScrollState.scrollTo(0)
         }
         Box(modifier = Modifier.weight(1f), contentAlignment = Alignment.CenterStart) {
@@ -159,9 +164,7 @@ fun ComposerToolbar(
                             .testTag("model_chip"),
                 ) {
                     Text(
-                        // Keeps the provider so same-named models from different providers
-                        // stay distinguishable while allowing the full label to be revealed.
-                        text = currentSessionModel?.let(::composerModelLabel) ?: "Model",
+                        text = modelLabel,
                         style = MaterialTheme.typography.bodyMedium,
                         color = palette.onControl,
                         maxLines = 1,
@@ -454,19 +457,39 @@ private fun listeningIconButtonColors(): IconButtonColors =
     )
 
 /**
- * Model label for the composer pill: the session's "provider/model" id with
+ * Model label for the composer pill:
+ * When [showProvider] is true, shows the session's "provider/model" id with
  * only the "custom:" marker removed from the provider ("custom:acme/glm-5.3"
- * → "acme/glm-5.3"). The provider itself is kept so the same model served by
+ * → "acme/glm-5.3"). The provider is kept so the same model served by
  * different providers never renders identically.
+ * When [showProvider] is false (default), shows only the model name ("openai/gpt-5"
+ * → "gpt-5", "custom:acme/glm-5.3" → "glm-5.3").
  */
-internal fun composerModelLabel(sessionModel: String): String {
+internal fun composerModelLabel(
+    sessionModel: String,
+    showProvider: Boolean = false,
+): String {
     val slash = sessionModel.indexOf('/')
     if (slash <= 0) return sessionModel
-    val provider = sessionModel.substring(0, slash)
-    if (!provider.startsWith(CUSTOM_PROVIDER_PREFIX) || provider.length == CUSTOM_PROVIDER_PREFIX.length) {
-        return sessionModel
+
+    val rawProvider = sessionModel.substring(0, slash)
+    val model = sessionModel.substring(slash + 1)
+    if (model.isBlank()) return sessionModel
+
+    if (rawProvider == CUSTOM_PROVIDER_PREFIX) return sessionModel
+
+    if (!showProvider) {
+        val leaf = sessionModel.substringAfterLast('/')
+        return if (leaf.isNotBlank()) leaf else sessionModel
     }
-    return provider.removePrefix(CUSTOM_PROVIDER_PREFIX) + sessionModel.substring(slash)
+
+    val provider =
+        if (rawProvider.startsWith(CUSTOM_PROVIDER_PREFIX) && rawProvider.length > CUSTOM_PROVIDER_PREFIX.length) {
+            rawProvider.removePrefix(CUSTOM_PROVIDER_PREFIX)
+        } else {
+            rawProvider
+        }
+    return "$provider/$model"
 }
 
 private const val CUSTOM_PROVIDER_PREFIX = "custom:"

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

@@ -207,6 +207,8 @@ internal fun SettingsChatPage(
                 onAssistantMessageTokensChange = viewModel::onAssistantMessageTokensChange,
                 showTokensPerSecond = state.showTokensPerSecond,
                 onTokensPerSecondChange = viewModel::onTokensPerSecondChange,
+                showModelProvider = state.showModelProvider,
+                onShowModelProviderChange = viewModel::onShowModelProviderChange,
             )
         }
     }

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

@@ -43,6 +43,7 @@ data class SettingsUiState(
     val showUserMessageTokens: Boolean = true,
     val showAssistantMessageTokens: Boolean = true,
     val showTokensPerSecond: Boolean = true,
+    val showModelProvider: Boolean = false,
     val profiles: List<ConnectionProfile> = emptyList(),
     val selectedProfileId: String? = null,
     val renameProfileName: String = "",
@@ -89,6 +90,7 @@ class SettingsViewModel(
         val showUserMessageTokens = AuthManager.isUserMessageTokensEnabled()
         val showAssistantMessageTokens = AuthManager.isAssistantMessageTokensEnabled()
         val showTokensPerSecond = AuthManager.isTokensPerSecondEnabled()
+        val showModelProvider = AuthManager.isModelProviderShown()
         val profiles = AuthManager.getConnectionProfiles()
         val appLanguage = AuthManager.getAppLanguage()
         val renameProfileName =
@@ -114,6 +116,7 @@ class SettingsViewModel(
                 showUserMessageTokens = showUserMessageTokens,
                 showAssistantMessageTokens = showAssistantMessageTokens,
                 showTokensPerSecond = showTokensPerSecond,
+                showModelProvider = showModelProvider,
                 profiles = profiles,
                 selectedProfileId = selectedId,
                 renameProfileName = renameProfileName,
@@ -360,6 +363,11 @@ class SettingsViewModel(
         AuthManager.setTokensPerSecondEnabled(enabled)
     }
 
+    fun onShowModelProviderChange(enabled: Boolean) {
+        _uiState.update { it.copy(showModelProvider = enabled, isSaved = false) }
+        AuthManager.setModelProviderShown(enabled)
+    }
+
     /** Clear all auth credentials — logs out and returns to landing screen. */
     fun logout() {
         AuthManager.setToken(null)
@@ -393,6 +401,7 @@ class SettingsViewModel(
         AuthManager.setUserMessageTokensEnabled(state.showUserMessageTokens)
         AuthManager.setAssistantMessageTokensEnabled(state.showAssistantMessageTokens)
         AuthManager.setTokensPerSecondEnabled(state.showTokensPerSecond)
+        AuthManager.setModelProviderShown(state.showModelProvider)
         ApiClient.rebuild()
 
         viewModelScope.launch(ioDispatcher) {

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

@@ -213,6 +213,8 @@ internal fun ChatSection(
     onAssistantMessageTokensChange: (Boolean) -> Unit = {},
     showTokensPerSecond: Boolean = true,
     onTokensPerSecondChange: (Boolean) -> Unit = {},
+    showModelProvider: Boolean = false,
+    onShowModelProviderChange: (Boolean) -> Unit = {},
 ) {
     val fontScaleOptions = listOf(0.85f, 1.0f, 1.15f, 1.30f, 1.50f)
     val currentIndex =
@@ -425,6 +427,38 @@ internal fun ChatSection(
 
         Spacer(modifier = Modifier.height(20.dp))
 
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Column(modifier = Modifier.weight(1f).padding(end = 16.dp)) {
+                Text(
+                    text = stringResource(R.string.settings_item_show_model_provider),
+                    style = MaterialTheme.typography.bodyLarge,
+                )
+                Text(
+                    text = stringResource(R.string.settings_desc_show_model_provider),
+                    style =
+                        MaterialTheme.typography.bodySmall.copy(
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        ),
+                )
+            }
+            Switch(
+                checked = showModelProvider,
+                onCheckedChange = onShowModelProviderChange,
+                modifier = Modifier.testTag("settings_show_model_provider"),
+                colors =
+                    SwitchDefaults.colors(
+                        checkedThumbColor = MaterialTheme.colorScheme.primary,
+                        checkedTrackColor = MaterialTheme.colorScheme.primaryContainer,
+                    ),
+            )
+        }
+
+        Spacer(modifier = Modifier.height(20.dp))
+
         Row(
             modifier = Modifier.fillMaxWidth(),
             horizontalArrangement = Arrangement.SpaceBetween,