feat: add configurable global keyboard shortcut

MyVoxtral/MyVoxtral/Utilities/GlobalShortcut.swift

@@ -0,0 +1,31 @@
+import Cocoa
+
+final class GlobalShortcut {
+    private var monitor: Any?
+    var onTrigger: (() -> Void)?
+
+    func register(keyCode: UInt16, modifiers: UInt) {
+        unregister()
+        guard keyCode != 0 || modifiers != 0 else { return }
+
+        let requiredFlags = NSEvent.ModifierFlags(rawValue: modifiers)
+
+        monitor = NSEvent.addGlobalMonitorForEvents(matching: .keyDown) { [weak self] event in
+            let mask: NSEvent.ModifierFlags = [.command, .option, .control, .shift]
+            if event.keyCode == keyCode && event.modifierFlags.intersection(mask) == requiredFlags {
+                self?.onTrigger?()
+            }
+        }
+    }
+
+    func unregister() {
+        if let monitor {
+            NSEvent.removeMonitor(monitor)
+        }
+        monitor = nil
+    }
+
+    deinit {
+        unregister()
+    }
+}