Fix MySQL connection and DatabaseSeeder BOM issues

Two critical fixes:

1. DB_PORT was being appended to Laravel .env file
   - Setup script was writing DB_PORT=3307 (external port)
   - Laravel needs internal Docker port (3306)
   - Now ports are commented out in .env (reference only)
   - Docker-compose uses env vars, Laravel uses fixed internal ports

2. DatabaseSeeder.php had UTF-8 BOM (Byte Order Mark)
   - Caused 'Namespace declaration must be first statement' error
   - Removed invisible BOM bytes from file

These fixes ensure:
- MySQL connections work from within Docker network
- Database seeding completes successfully
- Fresh setup works end-to-end

setup.bat

@@ -114,12 +114,15 @@ echo Configuring environment...
 if exist "src\.env.%DB%" (
     copy /y "src\.env.%DB%" "src\.env" >nul
     
-    REM Append port configurations to .env
-    echo APP_PORT=%APP_PORT% >> src\.env
-    echo MAIL_DASHBOARD_PORT=%MAIL_DASHBOARD_PORT% >> src\.env
-    echo MAIL_PORT=%MAIL_PORT% >> src\.env
-    echo REDIS_PORT=%REDIS_PORT% >> src\.env
-    if defined DB_PORT echo DB_PORT=%DB_PORT% >> src\.env
+    REM Append port configurations to .env (for reference only, not used by Laravel)
+    REM Note: DB_PORT is NOT appended - Laravel uses internal Docker port (3306/5432)
+    REM These are for docker-compose external port mapping only
+    echo. >> src\.env
+    echo # Port Configuration ^(auto-assigned by setup^) >> src\.env
+    echo # APP_PORT=%APP_PORT% >> src\.env
+    echo # MAIL_DASHBOARD_PORT=%MAIL_DASHBOARD_PORT% >> src\.env
+    echo # MAIL_PORT=%MAIL_PORT% >> src\.env
+    echo # REDIS_PORT=%REDIS_PORT% >> src\.env
     
     echo Environment configured for %DB%
 ) else (