macos: only process key equivalents if we're focused

Fixes #1581

macos/Sources/Ghostty/SurfaceView_AppKit.swift

@@ -703,6 +703,13 @@ extension Ghostty {
                 return false
             }
             
+            // Only process events if we're focused. Some key events like C-/ macOS
+            // appears to send to the first view in the hierarchy rather than the
+            // the first responder (I don't know why). This prevents us from handling it.
+            if (!focused) {
+                return false
+            }
+
             let equivalent: String
             switch (event.charactersIgnoringModifiers) {
             case "/":