Initial commit

lib/presentation/common/widgets/app_empty_state.dart

@@ -0,0 +1,94 @@
+import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
+import 'package:trainhub_flutter/core/constants/ui_constants.dart';
+import 'package:trainhub_flutter/core/theme/app_colors.dart';
+
+class AppEmptyState extends StatelessWidget {
+  const AppEmptyState({
+    super.key,
+    required this.icon,
+    required this.title,
+    this.subtitle,
+    this.actionLabel,
+    this.onAction,
+  });
+
+  final IconData icon;
+  final String title;
+  final String? subtitle;
+  final String? actionLabel;
+  final VoidCallback? onAction;
+
+  @override
+  Widget build(BuildContext context) {
+    return Center(
+      child: Padding(
+        padding: const EdgeInsets.all(UIConstants.pagePadding),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Container(
+              width: 64,
+              height: 64,
+              decoration: BoxDecoration(
+                color: AppColors.surfaceContainer,
+                borderRadius: BorderRadius.circular(UIConstants.borderRadius),
+                border: Border.all(color: AppColors.border),
+              ),
+              child: Icon(
+                icon,
+                size: 28,
+                color: AppColors.textMuted,
+              ),
+            ),
+            const SizedBox(height: UIConstants.spacing16),
+            Text(
+              title,
+              style: GoogleFonts.inter(
+                fontSize: 16,
+                fontWeight: FontWeight.w600,
+                color: AppColors.textPrimary,
+              ),
+              textAlign: TextAlign.center,
+            ),
+            if (subtitle != null) ...[
+              const SizedBox(height: UIConstants.spacing8),
+              Text(
+                subtitle!,
+                style: GoogleFonts.inter(
+                  fontSize: 14,
+                  color: AppColors.textSecondary,
+                ),
+                textAlign: TextAlign.center,
+              ),
+            ],
+            if (actionLabel != null && onAction != null) ...[
+              const SizedBox(height: UIConstants.spacing24),
+              FilledButton(
+                onPressed: onAction,
+                style: FilledButton.styleFrom(
+                  backgroundColor: AppColors.accent,
+                  foregroundColor: AppColors.zinc950,
+                  shape: RoundedRectangleBorder(
+                    borderRadius: UIConstants.smallCardBorderRadius,
+                  ),
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: UIConstants.spacing24,
+                    vertical: UIConstants.spacing12,
+                  ),
+                ),
+                child: Text(
+                  actionLabel!,
+                  style: GoogleFonts.inter(
+                    fontSize: 14,
+                    fontWeight: FontWeight.w600,
+                  ),
+                ),
+              ),
+            ],
+          ],
+        ),
+      ),
+    );
+  }
+}