fix: Window menu tiling items are disabled

CHANGELOG.md

@@ -42,6 +42,7 @@ Programa is a fork of [cmux](https://github.com/manaflow-ai/cmux); for history p
 - The library-validation and unsigned-executable-memory entitlements.
 
 ### Fixed
+- The Window menu's Fill, Center, Move & Resize, Full Screen Tile and Move to Display items, and their shortcuts, work again. The main window had been marked not movable, which makes macOS disable all of them.
 - Port chips in the sidebar now show up again for terminals restored after relaunching Programa. The restored terminals kept their running shell, but port scanning never learned about them.
 - A window closed with the red button no longer comes back on the next launch. Since 0.5.0 a closed window was kept alive for Dock reopen and then saved and restored like a visible one, so every restart opened an extra window of stale workspaces. Closed windows now stay closed across a relaunch and their shells are ended at startup.
 - The agent status badge in a sidebar row stays readable in a narrow sidebar; the tab title is cut short instead. While the badge shows, a spinner character at the start of a program-set title (such as Claude Code's "◐" or "✳") is hidden, since the badge already shows the state.

Sources/AppDelegate.swift

@@ -4757,8 +4757,12 @@ final class AppDelegate: NSObject, NSApplicationDelegate, @preconcurrency UNUser
         window.title = ""
         window.titleVisibility = .hidden
         window.titlebarAppearsTransparent = true
+        // Keep the window movable: AppKit validates Window > Fill / Center /
+        // Move & Resize / Move to Display (and their shortcuts) against
+        // `isMovable`. Native titlebar drag stays off because
+        // MainWindowHostingView returns false from `mouseDownCanMoveWindow`;
+        // explicit drag surfaces use `performDrag` instead.
         window.isMovableByWindowBackground = false
-        window.isMovable = false
         let restoredFrame = resolvedWindowFrame(from: sessionWindowSnapshot)
         if let restoredFrame {
             window.setFrame(restoredFrame, display: false)
@@ -8135,16 +8139,14 @@ final class AppDelegate: NSObject, NSApplicationDelegate, @preconcurrency UNUser
         if !window.titlebarAppearsTransparent {
             window.titlebarAppearsTransparent = true
         }
-        // Keep window immovable; the sidebar's WindowDragHandleView handles
-        // drag-to-move via performDrag with temporary movable override.
-        // isMovableByWindowBackground=true breaks tab reordering, and
-        // isMovable=true blocks clicks on sidebar buttons in minimal mode.
+        // isMovableByWindowBackground=true breaks sidebar tab reordering, so
+        // drag-to-move goes through WindowDragHandleView's performDrag. The
+        // window itself stays movable (see createMainWindow) so the Window menu
+        // tiling items validate; MainWindowHostingView's mouseDownCanMoveWindow
+        // override keeps clicks on sidebar buttons from becoming native drags.
         if window.isMovableByWindowBackground {
             window.isMovableByWindowBackground = false
         }
-        if window.isMovable {
-            window.isMovable = false
-        }
         if !window.styleMask.contains(.fullSizeContentView) {
             window.styleMask.insert(.fullSizeContentView)
         }

Sources/MainWindowHostingView.swift

@@ -19,6 +19,12 @@ final class MainWindowHostingView<Content: View>: NSHostingView<Content>, MainWi
     override var safeAreaRect: NSRect { bounds }
     override var safeAreaLayoutGuide: NSLayoutGuide { zeroSafeAreaLayoutGuide }
 
+    /// The window stays `isMovable` so AppKit enables the Window menu tiling
+    /// items, but SwiftUI content under the transparent titlebar must not turn
+    /// a click into a native window drag (sidebar buttons in minimal mode).
+    /// Explicit drag surfaces call `performDrag` themselves.
+    override var mouseDownCanMoveWindow: Bool { false }
+
     required init(rootView: Content) {
         super.init(rootView: rootView)
         // Tell SwiftUI to ignore safe areas outright, rather than relying only on