feat(settings): enhance revision retention minutes validation

Introduced a preprocessing function to normalize input for the revision retention minutes field, ensuring it handles various input types correctly. Updated the schema to utilize this new validation method, improving data integrity and user experience.

web/src/lib/settings/revision-settings.schema.ts

@@ -1,7 +1,18 @@
 import { z } from 'zod';
 
-export const revisionSettingsSchema = z.object({
-	revision_retention_minutes: z.string().refine(
+/** HTML type=number binds number; API/store may return number — normalize to string for validation. */
+function retentionMinutesInput(val: unknown): string {
+	if (val === undefined || val === null) return '';
+	if (typeof val === 'number') {
+		if (!Number.isFinite(val)) return '';
+		return String(Math.trunc(val));
+	}
+	return String(val);
+}
+
+const revisionRetentionMinutes = z.preprocess(
+	retentionMinutesInput,
+	z.string().refine(
 		(v) => {
 			const s = v.trim();
 			if (s === '') return true;
@@ -10,6 +21,10 @@ export const revisionSettingsSchema = z.object({
 		},
 		{ message: 'TTL ревизий должен быть целым числом от 15 до 43200 минут' }
 	)
+);
+
+export const revisionSettingsSchema = z.object({
+	revision_retention_minutes: revisionRetentionMinutes
 });
 
 export type RevisionSettingsForm = z.infer<typeof revisionSettingsSchema>;