feat: add restore command integration and development workflow improvements

- Add restore command to CLI root (cmd/root.go)
- Add restore-clean justfile target for development workflow
- Update justfile clean command to remove backups
- Improve auth UI status display and enhance button visibility
- Clean up auth.js formatting and enhance button management

justfile

@@ -135,7 +135,7 @@ health port="8080":
     @echo "🔍 Checking API server health..."
     @curl -s http://localhost:{{port}}/health | jq . || echo "❌ Server not responding at localhost:{{port}}"
 
-# Clean all build artifacts
+# Clean all build artifacts and backups
 clean:
     rm -rf lib/dist
     rm -rf insertr
@@ -145,6 +145,12 @@ clean:
     rm -rf lib/node_modules
     rm -f dev.db
     rm -f insertr.db
+    @echo "🧹 Cleaned all build artifacts and backups"
+
+# Restore demo site to clean original state
+restore-clean:
+    @echo "🧹 Restoring demo site to clean state..."
+    ./insertr restore demo --clean
 
 # Lint code (placeholder for now)
 lint:
@@ -180,7 +186,8 @@ status:
     @echo "   just enhance   - Build-time content injection"
     @echo ""
     @echo "🔍 Check server: just health"
+    @echo "🧹 Restore clean: just restore-clean"
 
 # Generate sqlc code (for database schema changes)
 sqlc:
-    sqlc generate
+    sqlc generate