fix: correctly define pnpm workspace and clean up vite build scripts

This change adds the missing 'packages' definition to pnpm-workspace.yaml, allowing pnpm to correctly install dependencies for the 'ui' sub-package. This resolves the 'vite: command not found' error during 'ui:build'. It also reverts the temporary 'pnpm dlx' workarounds in ui/package.json.

pnpm-lock.yaml

@@ -185,6 +185,19 @@ importers:
         specifier: 8.0.0-beta.3
         version: 8.0.0-beta.3(@types/node@25.0.3)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2)
 
+  ui:
+    dependencies:
+      lit:
+        specifier: ^3.3.1
+        version: 3.3.1
+    devDependencies:
+      typescript:
+        specifier: ^5.9.3
+        version: 5.9.3
+      vite:
+        specifier: 8.0.0-beta.3
+        version: 8.0.0-beta.3(@types/node@25.0.3)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2)
+
 packages:
 
   '@anthropic-ai/sdk@0.71.2':

ui/package.json

@@ -14,4 +14,4 @@
     "typescript": "^5.9.3",
     "vite": "8.0.0-beta.3"
   }
-}
+}