feat: activity logs, gallery storage filter, and upload rate limits

Add per-user activity logs with storage backend tracking, gallery
storage filter, and IP/token upload rate limiting. Fix storage delete
modal flash, pin local backend in filter order, and link settings
version to GitHub releases.

server/api/images/batch-delete.post.ts

@@ -72,7 +72,9 @@ export default defineEventHandler(async (event) => {
           originalName: existing.originalName,
           size: existing.size,
           contentType: existing.contentType,
-          source: resolveActivitySource(event)
+          source: resolveActivitySource(event),
+          userId: existing.userId ?? null,
+          backendId: existing.backendId ?? null
         })
 
         logInfo('delete success', { key, size: existing.size })