macos: add title override to restorable state

macos/Sources/Features/Terminal/BaseTerminalController.swift

@@ -83,7 +83,7 @@ class BaseTerminalController: NSWindowController,
 
     /// An override title for the tab/window set by the user via prompt_tab_title.
     /// When set, this takes precedence over the computed title from the terminal.
-    var tabTitleOverride: String? = nil {
+    var titleOverride: String? = nil {
         didSet { applyTitleToWindow() }
     }
 
@@ -344,7 +344,7 @@ class BaseTerminalController: NSWindowController,
         alert.alertStyle = .informational
 
         let textField = NSTextField(frame: NSRect(x: 0, y: 0, width: 250, height: 24))
-        textField.stringValue = tabTitleOverride ?? window.title
+        textField.stringValue = titleOverride ?? window.title
         alert.accessoryView = textField
 
         alert.addButton(withTitle: "OK")
@@ -358,9 +358,9 @@ class BaseTerminalController: NSWindowController,
 
             let newTitle = textField.stringValue
             if newTitle.isEmpty {
-                self.tabTitleOverride = nil
+                self.titleOverride = nil
             } else {
-                self.tabTitleOverride = newTitle
+                self.titleOverride = newTitle
             }
         }
     }
@@ -764,7 +764,7 @@ class BaseTerminalController: NSWindowController,
 
     private func applyTitleToWindow() {
         guard let window else { return }
-        window.title = tabTitleOverride ?? lastComputedTitle
+        window.title = titleOverride ?? lastComputedTitle
     }
     
     func pwdDidChange(to: URL?) {

macos/Sources/Features/Terminal/TerminalRestorable.swift

@@ -4,18 +4,20 @@ import Cocoa
 class TerminalRestorableState: Codable {
     static let selfKey = "state"
     static let versionKey = "version"
-    static let version: Int = 6
+    static let version: Int = 7
 
     let focusedSurface: String?
     let surfaceTree: SplitTree<Ghostty.SurfaceView>
     let effectiveFullscreenMode: FullscreenMode?
     let tabColor: TerminalTabColor
+    let titleOverride: String?
 
     init(from controller: TerminalController) {
         self.focusedSurface = controller.focusedSurface?.id.uuidString
         self.surfaceTree = controller.surfaceTree
         self.effectiveFullscreenMode = controller.fullscreenStyle?.fullscreenMode
         self.tabColor = (controller.window as? TerminalWindow)?.tabColor ?? .none
+        self.titleOverride = controller.titleOverride
     }
 
     init?(coder aDecoder: NSCoder) {
@@ -34,6 +36,7 @@ class TerminalRestorableState: Codable {
         self.focusedSurface = v.value.focusedSurface
         self.effectiveFullscreenMode = v.value.effectiveFullscreenMode
         self.tabColor = v.value.tabColor
+        self.titleOverride = v.value.titleOverride
     }
 
     func encode(with coder: NSCoder) {
@@ -100,6 +103,9 @@ class TerminalWindowRestoration: NSObject, NSWindowRestoration {
         // Restore our tab color
         (window as? TerminalWindow)?.tabColor = state.tabColor
 
+        // Restore the tab title override
+        c.titleOverride = state.titleOverride
+
         // Setup our restored state on the controller
         // Find the focused surface in surfaceTree
         if let focusedStr = state.focusedSurface {