feat(admin): category SEO fields, Templates admin, safe project PATCH

- categories/tags admin forms: add meta title/description/keywords, bot-follow,
  sort, is_active (backend already supported these)
- new Templates admin (/admin/templates): container CRUD with description,
  keywords, publishing, premium, primary mode, category/tag assignment, plus
  editable per-variant aspect & resolution
- content-svc: PATCH /v1/projects/{id} partial update so aspect/resolution edits
  never wipe render/colour data (SharedColorsSvg, RenderAepComp, Folder)
- admin resource proxy: add PATCH passthrough

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

messages/fa.json

@@ -319,7 +319,8 @@
       "blogs": "بلاگ",
       "slides": "اسلایدها",
       "users": "کاربران",
-      "plans": "پلن‌ها"
+      "plans": "پلن‌ها",
+      "templates": "قالب‌ها"
     },
     "appAdminNodesPage": {
       "title": "نودهای رندر",