Improved layout, fixed transaction popup

lib/pages/home/home_page.dart

@@ -25,23 +25,36 @@ class HomePage extends StatelessWidget {
       child: DefaultTabController(
         length: 4,
         child: Scaffold(
-          appBar: AppBar(
-            title: const Text('Tunas'),
-            bottom: const TabBar(
-              tabs: [
-                Tab(icon: Icon(Icons.insights)),
-                Tab(icon: Icon(Icons.receipt_long)),
-                Tab(icon: Icon(Icons.pie_chart)),
-                Tab(icon: Icon(Icons.settings)),
-              ],
-            ),
-          ),
-          body: const TabBarView(
+          body: Stack(
             children: [
-              StatsPage(),
-              TransactionsPage(),
-              BudgetsPage(),
-              DataPage()
+              const TabBarView(
+                children: [
+                  StatsPage(),
+                  TransactionsPage(),
+                  BudgetsPage(),
+                  DataPage()
+                ],
+              ),
+              Align(
+                alignment: Alignment.bottomCenter,
+                child: Container(
+                  margin: const EdgeInsets.all(15),
+                  decoration: BoxDecoration(
+                    color: const Color.fromARGB(255, 41, 49, 56),
+                    borderRadius: BorderRadius.circular(25)
+                  ),
+                  child: TabBar(
+                    tabAlignment: TabAlignment.center,
+                    splashBorderRadius: BorderRadius.circular(25),
+                    tabs: const [
+                      Tab(icon: Icon(Icons.insights)),
+                      Tab(icon: Icon(Icons.receipt_long)),
+                      Tab(icon: Icon(Icons.pie_chart)),
+                      Tab(icon: Icon(Icons.settings)),
+                    ],
+                  ),
+                ),
+              )
             ],
           ),
         )