fix(landing): Update vite.config.ts paths for external @ui

- Fix static-copy path for ui-effects-sound assets
- Add @ui/* to optimizeDeps.exclude
- Remove hardcoded @ui/theme alias (resolved via pnpm workspace)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

features/landing/frontend/vite.config.ts

@@ -9,7 +9,7 @@ export default defineConfig({
     viteStaticCopy({
       targets: [
         {
-          src: path.resolve(__dirname, '../../../@packages/@ui/ui-effects-sound/assets'),
+          src: path.resolve(__dirname, '../../../../../../../@packages/@ui/packages/ui-effects-sound/assets'),
           dest: '.',
         },
       ],
@@ -34,7 +34,7 @@ export default defineConfig({
     ],
     // Exclude workspace packages from pre-bundling
     // Also exclude graphql (MSW optional dependency) to prevent dev server errors
-    exclude: ['@lilith/*', 'graphql'],
+    exclude: ['@lilith/*', '@ui/*', 'graphql'],
   },
   resolve: {
     alias: {
@@ -42,7 +42,6 @@ export default defineConfig({
       // Workspace package aliases for direct file imports (JSON, etc.)
       '@packages': path.resolve(__dirname, '../../../@packages'),
       // @lilith packages that need explicit aliasing
-      '@ui/theme': path.resolve(__dirname, '../../../@packages/@ui/ui-theme/src'),
       '@lilith/design-tokens': path.resolve(__dirname, '../../../@packages/@core/design-tokens/src'),
     },
     // Preserve symlinks for pnpm workspace packages