refactor: extract effectiveEngine logic into reusable method and fix minor typos in UI labels and logging statements

Author: AshotN

src/main/kotlin/com/ashotn/opencode/companion/settings/OpenCodeSettingsConfigurable.kt

@@ -60,7 +60,7 @@ class OpenCodeSettingsConfigurable(private val project: Project) :
                 }
                 buttonsGroup("Terminal engine:") {
                     row {
-                        radioButton("Classic (Recomended)", TerminalEngine.CLASSIC)
+                        radioButton("Classic (Recommended)", TerminalEngine.CLASSIC)
                             .comment("Legacy JediTerm widget. Works on all supported IDE versions.")
                     }
                     row {

src/main/kotlin/com/ashotn/opencode/companion/terminal/ClassicTuiPanel.kt

@@ -96,7 +96,7 @@ class ClassicTuiPanel(
     }
 
     override fun focusTerminal() {
-        terminalWidget?.requestFocus()
+        terminalWidget?.component?.requestFocusInWindow()
     }
 
     override val isStarted: Boolean get() = terminalWidget != null
@@ -115,14 +115,7 @@ class ClassicTuiPanel(
         Disposer.dispose(widget)
     }
 
-    override fun dispose() {
-        val widget = terminalWidget ?: return
-        terminalWidget = null
-        remove(widget.component)
-        revalidate()
-        repaint()
-        Disposer.dispose(widget)
-    }
+    override fun dispose() = tearDown()
 
     companion object {
         private val logger = Logger.getInstance(ClassicTuiPanel::class.java)

src/main/kotlin/com/ashotn/opencode/companion/terminal/ReworkedTuiPanel.kt

@@ -117,7 +117,7 @@ class ReworkedTuiPanel(
             logger.warn("Reworked terminal classes unavailable", e)
             // Panel stays empty.
         } catch (e: Exception) {
-            logger.warn("Failed to start classic terminal", e)
+            logger.warn("Failed to start reworked terminal", e)
             // Panel stays empty.
         }
     }

src/main/kotlin/com/ashotn/opencode/companion/toolwindow/OpenCodeToolWindowPanel.kt

@@ -57,7 +57,7 @@ class OpenCodeToolWindowPanel(private val project: Project) : JPanel(BorderLayou
     private val outerCardPanel = JPanel(outerCardLayout)
     private val pendingFilesPanel = PendingFilesPanel(project, this)
     private var tuiPanel: TuiPanel = createTuiPanel()
-    private var activeTuiEngine: TerminalEngine = OpenCodeSettings.getInstance(project).terminalEngine
+    private var activeTuiEngine: TerminalEngine = effectiveEngine(OpenCodeSettings.getInstance(project).terminalEngine)
     private val syncScheduled = AtomicBoolean(false)
     private val plugin = OpenCodePlugin.getInstance(project)
     private val serverStateListener = ServerStateListener { requestSyncCard() }
@@ -177,12 +177,7 @@ class OpenCodeToolWindowPanel(private val project: Project) : JPanel(BorderLayou
      * it into the split pane — all without requiring an IDE restart.
      */
     private fun swapTuiPanelIfEngineChanged() {
-        val requestedEngine = OpenCodeSettings.getInstance(project).terminalEngine
-        val effectiveEngine = if (requestedEngine == TerminalEngine.REWORKED && !BuildUtils.isEmbeddedTerminalSupported) {
-            TerminalEngine.CLASSIC
-        } else {
-            requestedEngine
-        }
+        val effectiveEngine = effectiveEngine(OpenCodeSettings.getInstance(project).terminalEngine)
         if (effectiveEngine == activeTuiEngine) return
 
         // Stop and dispose the old panel.
@@ -224,14 +219,24 @@ class OpenCodeToolWindowPanel(private val project: Project) : JPanel(BorderLayou
      */
     private fun createTuiPanel(): TuiPanel {
         val settings = OpenCodeSettings.getInstance(project)
-        val engine = settings.terminalEngine
-        return if (engine == TerminalEngine.REWORKED && BuildUtils.isEmbeddedTerminalSupported) {
+        return if (effectiveEngine(settings.terminalEngine) == TerminalEngine.REWORKED) {
             ReworkedTuiPanel(project, this, onTerminated = { requestSyncCard() })
         } else {
             ClassicTuiPanel(project, this, onTerminated = { requestSyncCard() })
         }
     }
 
+    /**
+     * Resolves the effective [TerminalEngine] to use, falling back to [TerminalEngine.CLASSIC]
+     * when [TerminalEngine.REWORKED] is requested but the IDE version does not support it.
+     */
+    private fun effectiveEngine(requested: TerminalEngine): TerminalEngine =
+        if (requested == TerminalEngine.REWORKED && !BuildUtils.isEmbeddedTerminalSupported) {
+            TerminalEngine.CLASSIC
+        } else {
+            requested
+        }
+
     private var disposed = false
 
     override fun dispose() {