Fix overlay screen selection

Sources/Fluid/Services/NotchOverlayManager.swift

@@ -160,6 +160,7 @@ final class NotchOverlayManager {
 
         // Start monitoring active app changes (updates icon in real-time)
         ActiveAppMonitor.shared.startMonitoring()
+        let targetScreen = OverlayScreenResolver.screenForCurrentPointer()
 
         // Route to bottom overlay if user preference is set
         if SettingsStore.shared.overlayPosition == .bottom {
@@ -168,7 +169,7 @@ final class NotchOverlayManager {
         }
 
         // Otherwise show notch overlay (original behavior)
-        self.showNotchOverlay(audioLevelPublisher: audioLevelPublisher, mode: mode)
+        self.showNotchOverlay(audioLevelPublisher: audioLevelPublisher, mode: mode, screen: targetScreen)
     }
 
     /// Show bottom overlay (alternative to notch)
@@ -186,7 +187,7 @@ final class NotchOverlayManager {
     }
 
     /// Show notch overlay (original behavior)
-    private func showNotchOverlay(audioLevelPublisher: AnyPublisher<CGFloat, Never>, mode: OverlayMode) {
+    private func showNotchOverlay(audioLevelPublisher: AnyPublisher<CGFloat, Never>, mode: OverlayMode, screen: NSScreen?) {
         // Hide bottom overlay if it was visible
         if self.isBottomOverlayVisible {
             BottomOverlayWindowController.shared.hide()
@@ -221,7 +222,11 @@ final class NotchOverlayManager {
 
         // Show in expanded state
         Task { [weak self] in
-            await newNotch.expand()
+            if let screen {
+                await newNotch.expand(on: screen)
+            } else {
+                await newNotch.expand()
+            }
             // Only update state if we're still the active generation
             guard let self = self, self.generation == currentGeneration else { return }
             self.state = .visible
@@ -403,7 +408,11 @@ final class NotchOverlayManager {
 
         self.commandOutputNotch = newNotch
 
-        await newNotch.expand()
+        if let screen = OverlayScreenResolver.screenForCurrentPointer() {
+            await newNotch.expand(on: screen)
+        } else {
+            await newNotch.expand()
+        }
 
         guard self.commandOutputGeneration == currentGeneration else { return }
         self.commandOutputState = .visible

Sources/Fluid/Services/OverlayScreenResolver.swift

@@ -0,0 +1,15 @@
+//
+//  OverlayScreenResolver.swift
+//  Fluid
+//
+
+import AppKit
+
+enum OverlayScreenResolver {
+    static func screenForCurrentPointer() -> NSScreen? {
+        let location = NSEvent.mouseLocation
+        return NSScreen.screens.first { screen in
+            screen.frame.contains(location)
+        } ?? NSScreen.main ?? NSScreen.screens.first
+    }
+}

Sources/Fluid/Views/BottomOverlayView.swift

@@ -33,6 +33,7 @@ final class BottomOverlayWindowController {
     private var pendingResizeWorkItem: DispatchWorkItem?
     private var localMouseDownMonitor: Any?
     private var globalMouseDownMonitor: Any?
+    private var targetScreen: NSScreen?
 
     private init() {
         NotificationCenter.default.addObserver(forName: NSNotification.Name("OverlayOffsetChanged"), object: nil, queue: .main) { [weak self] _ in
@@ -78,7 +79,7 @@ final class BottomOverlayWindowController {
             self.createWindow()
         }
 
-        // Position at bottom center of main screen
+        self.targetScreen = OverlayScreenResolver.screenForCurrentPointer()
         self.positionWindow()
 
         // Show with animation
@@ -98,6 +99,7 @@ final class BottomOverlayWindowController {
         self.audioSubscription = nil
         self.pendingResizeWorkItem?.cancel()
         self.pendingResizeWorkItem = nil
+        self.targetScreen = nil
         self.removeMouseDownMonitors()
         BottomOverlayPromptMenuController.shared.hide()
         BottomOverlayModeMenuController.shared.hide()
@@ -247,8 +249,7 @@ final class BottomOverlayWindowController {
         // Safe check for window and screen availability
         guard let window = window else { return }
 
-        // Use the screen that contains the window, or fallback to the main screen
-        let screen = window.screen ?? NSScreen.main
+        let screen = self.targetScreen ?? window.screen ?? OverlayScreenResolver.screenForCurrentPointer()
         guard let screen = screen else { return }
 
         let fullFrame = screen.frame