Sync connection modal: Hide Retry button for auth errors

Authentication failures can't be resolved by retrying, so hide the
manual Retry button for that error code. The auto-retry countdown
remains visible since the connection still retries behind the scenes.
Copy Post Content promotes to primary when Retry is hidden.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: dabowman

packages/editor/src/components/sync-connection-modal/index.js

@@ -113,7 +113,7 @@ export function SyncConnectionModal() {
 		return null;
 	}
 
-	const { title, description } = syncConnectionMessage;
+	const { title, description, canRetry } = syncConnectionMessage;
 
 	let retryCountdownText;
 	if ( secondsRemaining > 0 ) {
@@ -173,21 +173,23 @@ export function SyncConnectionModal() {
 						<Button
 							__next40pxDefaultSize
 							ref={ copyButtonRef }
-							variant="secondary"
+							variant={ canRetry ? 'secondary' : 'primary' }
 						>
 							{ __( 'Copy Post Content' ) }
 						</Button>
-						<Button
-							__next40pxDefaultSize
-							isBusy={ isRetrying }
-							variant="primary"
-							onClick={ () => {
-								markRetrying();
-								retrySyncConnection();
-							} }
-						>
-							{ __( 'Retry' ) }
-						</Button>
+						{ canRetry && (
+							<Button
+								__next40pxDefaultSize
+								isBusy={ isRetrying }
+								variant="primary"
+								onClick={ () => {
+									markRetrying();
+									retrySyncConnection();
+								} }
+							>
+								{ __( 'Retry' ) }
+							</Button>
+						) }
 					</HStack>
 				</VStack>
 			</Modal>

packages/editor/src/utils/sync-error-messages.js

@@ -13,27 +13,31 @@ const ERROR_MESSAGES = {
 			"Real-time collaboration couldn't verify your permissions. " +
 				'Check that you have access to edit this post, or contact your site administrator.'
 		),
+		canRetry: false,
 	},
 	'connection-expired': {
 		title: __( 'Connection expired' ),
 		description: __(
 			'Your connection to real-time collaboration has timed out. ' +
 				'Editing is paused to prevent conflicts with other editors.'
 		),
+		canRetry: true,
 	},
 	'connection-limit-exceeded': {
 		title: __( 'Too many editors connected' ),
 		description: __(
 			'Real-time collaboration has reached its connection limit. ' +
 				'Try again later or contact your site administrator.'
 		),
+		canRetry: true,
 	},
 	'unknown-error': {
 		title: __( 'Connection lost' ),
 		description: __(
 			'The connection to real-time collaboration was interrupted. ' +
 				'Editing is paused to prevent conflicts with other editors.'
 		),
+		canRetry: true,
 	},
 };