chore(tos): bump cache version 5 → 6 for 014 atmosphere swap

14号 gallery atmospheres 1 & 2 swapped + atmosphere 1 recropped to 3:4
to frame the upper body. Same TOS URLs with new content, version bump
forces CDN/browsers to refetch.

TOS uploads: portraits/014.webp (overwrite, now wide-orchestra cropped
to 3:4), portraits/014-2.webp (overwrite, now closeup studio shot).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/lib/tos.ts

@@ -14,7 +14,7 @@
  * 立即看到更新后的内容,不必等 TTL 过期或手动 invalidate。
  */
 const TOS_BASE = (process.env.NEXT_PUBLIC_TOS_DOMAIN ?? "").replace(/\/+$/, "");
-const TOS_VERSION = "5";
+const TOS_VERSION = "6";
 
 export function tosUrl(path: string): string {
   const clean = path.replace(/^\/+/, "");