Sync third-party and MCP marketplace plugins

Constraint: Public skills are published only by explicit administrator action unless they are tracked third-party market sources.
Confidence: high
Scope-risk: narrow
Directive: Keep private/internal skills out of the public marketplace and preserve normal incremental market Git history.
Tested: Marketplace validation passed.

config/external-sources.lock.json

@@ -15,8 +15,8 @@
       "repo": "https://github.com/Yeachan-Heo/oh-my-codex.git",
       "ref": "main",
       "adapter": "codex-plugin",
-      "commit": "b39280e92954d9d840215faad524b746b605c622",
-      "syncedAt": "2026-06-17T15:59:59Z"
+      "commit": "4dde22a58a87ada9d86d26981bf58eeb55a42bc7",
+      "syncedAt": "2026-06-21T16:00:01Z"
     },
     {
       "id": "ui-ux-pro-max",
@@ -24,8 +24,8 @@
       "repo": "https://github.com/nextlevelbuilder/ui-ux-pro-max-skill.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "b7e3af80f6e331f6fb456667b82b12cade7c9d35",
-      "syncedAt": "2026-06-10T07:28:13Z"
+      "commit": "10d6ca310541d3ffeee6dceda0a29e373796f321",
+      "syncedAt": "2026-06-21T16:00:01Z"
     },
     {
       "id": "shadcn",
@@ -33,8 +33,8 @@
       "repo": "https://github.com/shadcn-ui/ui.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "3ffd3e1c7c801f5af5aa72f7c70e21ace3b356bc",
-      "syncedAt": "2026-06-19T16:00:00Z"
+      "commit": "70a7a0c2a8271ccde9932fb40d5b4adeacb9b131",
+      "syncedAt": "2026-06-21T16:00:01Z"
     },
     {
       "id": "frontend-slides",
@@ -69,8 +69,8 @@
       "repo": "https://github.com/hugohe3/ppt-master.git",
       "ref": "main",
       "adapter": "claude-skill",
-      "commit": "c948611f54ae8aae089083bf18b02b10bdb79957",
-      "syncedAt": "2026-06-20T16:00:01Z"
+      "commit": "c0ace9d5d7cfa991d550ec4c54cf7722ffbcff07",
+      "syncedAt": "2026-06-21T16:00:01Z"
     },
     {
       "id": "next-skills",