Add minimal stock listing app: actions, Postgres schema, stocks page, Claude Agent SDK harness

- Add stocks table (server/db) with list/get/add/update/delete actions, scoped
  per user, backing both the chat agent and the /stocks UI via
  useActionQuery/useActionMutation
- Add mobile-first /stocks page (shadcn table/cards, watchlist, search) and
  wire it into the sidebar, navigation state, and view-screen context
- Install the platform's Claude Agent SDK harness (server/plugins,
  server/routes/api/claude-agent) so the app agent runs on the platform's own
  Claude subscription instead of the Builder.io gateway; fix the vendored
  turn.post.ts route to resolve the session and wrap it in
  runWithRequestContext, since custom /api/ routes aren't auto-wrapped in
  request context the way /_agent-native/actions/* are
- Add shadcn table/badge/dialog/select components (Tabler icons, not lucide)

pnpm-workspace.yaml

@@ -1,8 +1,8 @@
-
 allowBuilds:
   node-pty: true
   esbuild: true
   better-sqlite3: true
+  tesseract.js: false
 
 overrides:
   nf3: "0.3.17"
@@ -19,3 +19,5 @@ minimumReleaseAgeExclude:
   - "@modelcontextprotocol/node"
   - "@modelcontextprotocol/core"
   - "@modelcontextprotocol/client"
+  - '@agent-native/core@0.129.1'
+  - '@agent-native/toolkit@0.10.11'