feat: Add no data message to attendance dashboard chart

lib/view/dashboard/dashboard_chart.dart

@@ -92,9 +92,11 @@ class AttendanceDashboardChart extends StatelessWidget {
                   duration: const Duration(milliseconds: 300),
                   child: isLoading
                       ? SkeletonLoaders.buildLoadingSkeleton()
-                      : isChartView
+                      : filteredData.isEmpty
-                          ? _buildChart()
+                          ? _buildNoDataMessage()
-                          : _buildTable(),
+                          : isChartView
+                              ? _buildChart()
+                              : _buildTable(),
                 ),
               ],
             ),
@@ -236,6 +238,26 @@ class AttendanceDashboardChart extends StatelessWidget {
     );
   }
 
+  Widget _buildNoDataMessage() {
+    return SizedBox(
+      height: 200,
+      child: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            Icon(Icons.info_outline, color: Colors.grey.shade500, size: 48),
+            const SizedBox(height: 12),
+            MyText.bodyMedium(
+              'No attendance data available for the selected range or project.',
+              textAlign: TextAlign.center,
+              color: Colors.grey.shade600,
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
   Widget _buildTable() {
     final formattedDateMap = {
       for (var e in filteredData)