fix: discover repository-local .agents skills in Settings

Skills listing ignored the active project when the OpenCode client
directory was unset, so project `.agents/skills` files were created but
never shown. Prefer the active project path (matching Commands/Agents)
and soft-fall back to it on skill API routes when directory is omitted.

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>

packages/web/server/lib/opencode/DOCUMENTATION.md

@@ -353,6 +353,10 @@ an authoritative loopback callback URL even when OpenChamber binds port `0`.
   - Skills config CRUD and metadata under `/api/config/skills*`
   - Skills catalog listing/source pagination, scan, and install routes
   - Supporting skill file read/write/delete routes
+  - Directory resolution prefers an explicit request directory, then soft-falls
+    back to the active project / `lastDirectory` so repository-local
+    `.agents/skills` and `.opencode/skills` remain discoverable when the client
+    omits `directory`. Requests without any project still list user-scoped skills.
 
 ## Public exports (proxy.js)
 - `registerOpenCodeProxy(app, dependencies)`: registers OpenCode proxy routes and middleware.