feat(chat): add model indicator in chat input section

Add a label that displays the currently selected AI model next to the agent dropdown in the AutoDevInputSection. The label shows "Default" when no specific model is selected.

Author: phodal

core/src/main/kotlin/cc/unitmesh/devti/gui/chat/ui/AutoDevInputSection.kt

@@ -75,6 +75,7 @@ class AutoDevInputSection(private val project: Project, val disposable: Disposab
     private val stopButtonPresentation: Presentation
     private val enhanceButtonPresentation: Presentation
     private val sendButton: ActionButton
+    private val modelLabel: JBLabel
     private val stopButton: ActionButton
     private val enhanceButton: ActionButton
     private var buttonPanel: JPanel = JPanel(CardLayout())
@@ -120,6 +121,10 @@ class AutoDevInputSection(private val project: Project, val disposable: Disposab
         input = AutoDevInput(project, listOf(), disposable, this)
         workspaceFilePanel = WorkspaceFilePanel(project)
 
+        // Create a label to display the current model ID
+        val modelId = AutoDevSettingsState.getInstance().defaultModelId.ifEmpty { "Default" }
+        modelLabel = JBLabel("Model: $modelId").apply { foreground = JBUI.CurrentTheme.Label.disabledForeground() }
+
         setupElementsList()
         val sendButtonPresentation = Presentation(AutoDevBundle.message("chat.panel.send"))
         sendButtonPresentation.icon = AutoDevIcons.SEND
@@ -197,6 +202,11 @@ class AutoDevInputSection(private val project: Project, val disposable: Disposab
 
             input.minimumSize = Dimension(input.minimumSize.width, 64)
             layoutPanel.addToLeft(customAgent)
+            // Add model label next to the custom agent dropdown
+            layoutPanel.addToLeft(Box.createHorizontalStrut(JBUI.scale(8)))
+            layoutPanel.addToLeft(modelLabel)
+        } else {
+            layoutPanel.addToLeft(modelLabel)
         }
 
         buttonPanel = createButtonPanel()
@@ -488,5 +498,4 @@ fun JComponent.mediumFontFunction() {
         it.font = JBFont.medium()
     }
     putClientProperty(FONT_KEY, f)
-}
-
+}