feat(10-03): implement SkillDetail page with Overview, Versions, Diff tabs

- Full SkillDetail.tsx replacing stub (Overview, Versions, Diff tabs)
- Separate installMutation and updateMutation with distinct toast messages
- VersionDiff component using diffLines from diff package
- Version selector with Select dropdowns in Diff tab
- ScrollArea for version list in Versions tab
- Install/Update/Uninstall dialogs with confirmation
- PageSkeleton variant=detail for loading state
- SkillDetail.test.tsx with 4 SSR smoke tests (all passing)
- diff + @types/diff packages installed in ui workspace

pnpm-lock.yaml

@@ -2124,8 +2124,8 @@ packages:
   '@open-draft/deferred-promise@2.2.0':
     resolution: {integrity: sha512-CecwLWx3rhxVQF6V4bAgPS5t+So2sTbPgAzafKkVizyi7tlwpcFpdFqq+wqF2OwNBmqFuu6tOyouTuxgpMfzmA==}
 
-  '@paperclipai/adapter-utils@2026.325.0':
-    resolution: {integrity: sha512-YDVSAgjkeJ0PvxXDJVN9MZDX7oYRzidLtGHmGgRGd6gSk/bF2ygAKvND4FI1YxDc/cRLQjqAFCpCYaC/9wqIEA==}
+  '@paperclipai/adapter-utils@0.3.1':
+    resolution: {integrity: sha512-W66k+hJkQE8ma0asM/Sd90AC8HHy/BLG/sd0aOC+rDWw+gOasQyUkTnDoPv1zhQuTyKEEvLFV6ByOOKqEiAz/A==}
 
   '@paralleldrive/cuid2@2.3.1':
     resolution: {integrity: sha512-XO7cAxhnTZl0Yggq6jOgjiOHhbgcO4NqFqwSmQpjK3b6TEE6Uj/jfSk6wzYyemh3+I0sHirKSetjQwn5cZktFw==}
@@ -7956,7 +7956,7 @@ snapshots:
 
   '@open-draft/deferred-promise@2.2.0': {}
 
-  '@paperclipai/adapter-utils@2026.325.0': {}
+  '@paperclipai/adapter-utils@0.3.1': {}
 
   '@paralleldrive/cuid2@2.3.1':
     dependencies:
@@ -10581,7 +10581,7 @@ snapshots:
 
   hermes-paperclip-adapter@0.2.1:
     dependencies:
-      '@paperclipai/adapter-utils': 2026.325.0
+      '@paperclipai/adapter-utils': 0.3.1
       picocolors: 1.1.1
 
   html-encoding-sniffer@6.0.0(@noble/hashes@2.0.1):