fix(ui): align action controls and protect keychain consent

src/components/AddDownloadsModal.tsx

@@ -1465,7 +1465,7 @@ export const AddDownloadsModal = () => {
             {metadataSummaryMessage(parsedItems)}
           </div>
           <div className="flex gap-2.5">
-            <button onClick={closeModalFromDismissAction} disabled={isSubmitting || showKeychainModal} className="add-download-button add-download-button-cancel px-4 text-xs">
+            <button onClick={closeModalFromDismissAction} disabled={isSubmitting || showKeychainModal} className="add-download-button add-download-button-secondary px-4 text-xs">
               Cancel
             </button>
             <div ref={actionMenuRef} className="relative flex gap-2.5">

src/components/DeleteConfirmationModal.tsx

@@ -90,7 +90,7 @@ export const DeleteConfirmationModal: React.FC = () => {
           <button
             onClick={handleCancel}
             disabled={isRemoving}
-            className="app-button app-button-cancel px-4 py-2 rounded-lg text-sm font-medium disabled:opacity-50"
+            className="app-button px-4 py-2 rounded-lg text-sm font-medium disabled:opacity-50"
           >
             Cancel
           </button>

src/components/DuplicateResolutionModal.tsx

@@ -68,7 +68,7 @@ export const DuplicateResolutionModal = ({ conflicts: initialConflicts, onConfir
         </div>
 
         <div className="p-4 border-t border-border-modal flex items-center justify-between bg-sidebar-bg/50">
-          <button onClick={onCancel} className="app-button app-button-cancel px-4 text-xs">
+          <button onClick={onCancel} className="app-button px-4 text-xs">
             Cancel
           </button>
           <button 

src/components/PropertiesModal.tsx

@@ -454,7 +454,7 @@ export const PropertiesModal = () => {
           <div className="flex gap-2">
             <button 
               onClick={() => setSelectedPropertiesDownloadId(null)} 
-              className="app-button app-button-cancel px-4 text-xs"
+              className="app-button px-4 text-xs"
             >
               Cancel
             </button>