chore: Add environment configuration and gitignore

.gitignore

@@ -0,0 +1,48 @@
+# Environment files (secrets)
+.env
+.env.local
+.env.development
+.env.production
+.env.*.local
+
+# Dependencies
+node_modules/
+.pnp
+.pnp.js
+
+# Nuxt
+.nuxt/
+.output/
+dist/
+
+# IDEs
+.vscode/*
+!.vscode/extensions.json
+!.vscode/settings.json
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+# Testing
+coverage/
+.nyc_output/
+
+# Supabase (local development)
+supabase/.temp/
+supabase/.branches/
+
+# Misc
+*.tsbuildinfo
+.eslintcache