Add Stargil Nails logo and favicon

- Replace emoji icons with Stargil Nails logo in header and loading spinner
- Add favicon.png to public directory
- Copy logo to public/assets for browser access
- Update vite.config.ts to serve public directory
- Add favicon link to HTML head section

.gitignore

@@ -7,13 +7,16 @@ yarn-error.log*
 pnpm-debug.log*
 lerna-debug.log*
 
-node_modules
-dist
-dist-ssr
+node_modules/
+dist/
+dist-ssr/
+.vite/
+coverage/
 
 # Editor directories and files
 .idea
 .DS_Store
+Thumbs.db
 *.suo
 *.ntvs*
 *.njsproj
@@ -37,8 +40,10 @@ dist-ssr
 etilqs_*
 
 # Environment variables
-.env*
+.env
+.env.*
 !.env.example
+.env.local
 
 # TypeScript cache
 *.tsbuildinfo