feat: expose restore failure reasons

• Exposes the reason for a restore failure when available instead of using a generic error.
• Prompts users to start a site if they attempt to restore before starting.

src/main/services/restoreService.ts

@@ -294,12 +294,18 @@ export const restoreFromBackup = async (opts: {
 	snapshotID: string;
 	repoID?: string;
 }): Promise<null | ErrorState> => {
+	const { site, provider, snapshotID, repoID } = opts;
+
 	if (serviceState.inProgressStateMachine) {
 		logger.warn('Restore process aborted: only one backup or restore process is allowed at one time and a backup or restore is already in progress.');
 		return Promise.reject('Restore process aborted: only one backup or restore process is allowed at one time and a backup or restore is already in progress.');
 	}
 
-	const { site, provider, snapshotID, repoID } = opts;
+	if (siteProcessManager.getSiteStatus(site) !== 'running') {
+		logger.info('Restore process aborted: site is not running.');
+		return Promise.reject('Please start the site before restoring a backup.');
+	}
+
 	return new Promise((resolve, reject) => {
 		const initialSiteStatus = siteProcessManager.getSiteStatus(site);
 

src/renderer/store/thunks.ts

@@ -207,12 +207,12 @@ const restoreSite = createAsyncThunk<
 			],
 			siteId,
 			rejectWithValue,
-			(details) => {
+			(details, response) => {
 				if (details.isErrorAndUncaptured) {
 					showSiteBanner({
 						icon: 'warning',
 						id: details.bannerId,
-						message: `There was an error while restoring your backup.`,
+						message: response?.error?.message || 'There was an error while restoring your backup.',
 						siteID: details.siteId,
 						title: 'Cloud Backup restore failed!',
 						variant: 'error',