ppm wo inspection back button added.

lib/views/pages/user/ppm/update_ppm/update_ppm.dart

@@ -158,6 +158,7 @@ class _UpdatePpmState extends State<UpdatePpm> with TickerProviderStateMixin {
                     ),
                   ),
                   TabBarView(
+                    physics: const NeverScrollableScrollPhysics(),
                     children: [
                       WoInfoForm(
                           planPreventiveVisit: _planPreventiveVisit,
@@ -183,6 +184,24 @@ class _UpdatePpmState extends State<UpdatePpm> with TickerProviderStateMixin {
             ).expanded,
             Row(
               children: [
+                if (tabIndex == 1) ...[
+                  AppFilledButton(
+                    buttonColor: _tabController!.index == 0 ? null:AppColor.background(context),
+                    textColor: _tabController!.index == 0 ? null: AppColor.blueStatus(context),
+                    showBorder: true,
+                    disableButton: _tabController!.index == 0,
+                    onPressed: () {
+                      if (_tabController!.index == 0) {
+                        return;
+                      }
+                      _tabController?.animateTo(_tabController!.index - 1);
+                      setState(() {});
+                      return;
+                    },
+                    label: context.translation.back,
+                  ).expanded,
+                  8.width,
+                ],
                 AppFilledButton(
                   buttonColor: AppColor.white60,
                   textColor: AppColor.neutral50,
@@ -191,7 +210,7 @@ class _UpdatePpmState extends State<UpdatePpm> with TickerProviderStateMixin {
                   },
                   label: context.translation.save,
                 ).expanded,
-                16.width,
+                8.width,
                 AppFilledButton(
                   onPressed: () {
                     if (tabIndex == 0) {