fix: about panel credits should be dark mode aware

shell/browser/browser_mac.mm

@@ -377,11 +377,22 @@ void RemoveFromLoginItems() {
   NSDictionary* options = DictionaryValueToNSDictionary(about_panel_options_);
 
   // Credits must be a NSAttributedString instead of NSString
-  id credits = options[@"Credits"];
+  NSString* credits = (NSString*)options[@"Credits"];
   if (credits != nil) {
+    // Check if app is running in dark mode
+    NSString* mode = [[NSUserDefaults standardUserDefaults]
+        stringForKey:@"AppleInterfaceStyle"];
+    BOOL isDarkMode = [mode isEqualToString:@"Dark"];
+
+    // Set color of credits depending on if we're in dark mode or not.
+    NSColor* color = isDarkMode ? [NSColor whiteColor] : [NSColor blackColor];
+    NSAttributedString* creditString = [[NSAttributedString alloc]
+        initWithString:credits
+            attributes:@{NSForegroundColorAttributeName : color}];
+
+    // Cast back to NSDictionary with updated options
     NSMutableDictionary* mutable_options = [options mutableCopy];
-    mutable_options[@"Credits"] = [[[NSAttributedString alloc]
-        initWithString:(NSString*)credits] autorelease];
+    mutable_options[@"Credits"] = creditString;
     options = [NSDictionary dictionaryWithDictionary:mutable_options];
   }