feat: update PATCH endpoint for spec metadata; adjust README updated_at timestamp

Author: tikazyq

packages/ui-vite/src/lib/api.ts

@@ -283,7 +283,7 @@ export const api = {
     name: string,
     updates: Partial<Pick<Spec, 'status' | 'priority' | 'tags'>>
   ): Promise<void> {
-    await fetchAPI(`/api/specs/${encodeURIComponent(name)}`, {
+    await fetchAPI(`/api/specs/${encodeURIComponent(name)}/metadata`, {
       method: 'PATCH',
       body: JSON.stringify(updates),
     });

specs/198-ui-vite-remaining-issues/README.md

@@ -10,7 +10,7 @@ tags:
 depends_on:
 - 193-frontend-ui-parity
 created_at: 2025-12-26T06:32:10.135558Z
-updated_at: 2026-01-06T14:59:35.350392Z
+updated_at: 2026-01-06T15:06:55.941151Z
 transitions:
 - status: in-progress
   at: 2025-12-26T06:33:23.302928Z