Eventify-frontend/lib/widgets/landscape_shell.dart

// lib/widgets/landscape_shell.dart
//
// Reusable two-panel landscape scaffold for all desktop/wide screens.
// Left panel uses the brand dark-blue gradient; right panel is the content area.
//
// Usage:
//   LandscapeShell(
//     leftPanel: MyLeftContent(),
//     rightPanel: MyRightContent(),
//   )

import 'package:flutter/material.dart';
import '../core/app_decoration.dart';

class LandscapeShell extends StatelessWidget {
  final Widget leftPanel;
  final Widget rightPanel;

  /// Flex weight for left panel (default 2 → ~40% of width)
  final int leftFlex;

  /// Flex weight for right panel (default 3 → ~60% of width)
  final int rightFlex;

  /// Optional background color for right panel (defaults to scaffold background)
  final Color? rightBackground;

  const LandscapeShell({
    Key? key,
    required this.leftPanel,
    required this.rightPanel,
    this.leftFlex = 2,
    this.rightFlex = 3,
    this.rightBackground,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    final bg = rightBackground ?? Theme.of(context).scaffoldBackgroundColor;
    return Row(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: [
        // ── Left panel — dark blue gradient ──────────────────────────────
        Flexible(
          flex: leftFlex,
          child: RepaintBoundary(
            child: Container(
              decoration: AppDecoration.blueGradient,
              child: leftPanel,
            ),
          ),
        ),

        // ── Right panel — content area ────────────────────────────────────
        Flexible(
          flex: rightFlex,
          child: RepaintBoundary(
            child: ColoredBox(
              color: bg,
              child: rightPanel,
            ),
          ),
        ),
      ],
    );
  }
}