refactor: split tool-workshop page into tab components (Task 4.1)

- Extract ToolTypesTab, ToolConfigsTab, ConfigFoldersTab from inline page
- Each tab is self-contained with own state, API calls, and forms
- Slim page to 77 lines (tab switcher + composition only)
- Add barrel export for tool-workshop feature components
- Add tsconfig path alias for @/* imports

Quality gates: tsc (pass), eslint (pass)
Refs: repo-restructure Task 4.1

apps/web/tsconfig.json

@@ -10,7 +10,11 @@
     "skipLibCheck": true,
     "resolveJsonModule": true,
     "isolatedModules": true,
-    "types": ["vite/client"]
+    "types": ["vite/client"],
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    }
   },
   "include": ["src"]
 }