feat: improve log viewer with auto-scroll and security enhancements

- Add auto-scroll toggle to log panels
- Enhance SSE connection handling with reconnection logic
- Improve HTML escaping in log lines for security
- Update build script to properly handle frontend artifacts
- Add graceful shutdown to backend server
- Update authentication to support configurable username

build.bat

@@ -18,7 +18,14 @@ cd ..
 
 REM Passo 2: Build do Backend (Go)
 echo 🔨 Compilando o backend com arquivos embedados...
-go build -o web-tail-pro.exe ./backend/main.go
+echo 📁 Copiando artefatos do frontend para backend/dist...
+if exist backend\dist rmdir /s /q backend\dist
+mkdir backend\dist
+xcopy /E /I /Y frontend\dist\* backend\dist\
+cd backend
+go mod tidy
+go build -o ../web-tail-pro.exe ./main.go
+cd ..
 
 if %errorlevel% neq 0 (
     echo ❌ Falha na compilação do backend. Abortando.