Dashboard: DashboardPageProxy - Use chaining operators to prevent runtime error (#86507)

* Use chaining operators to prevent runtime error

* Fix tests

---------

Co-authored-by: Ivan Ortega <ivanortegaalba@gmail.com>

public/app/features/dashboard/containers/DashboardPageProxy.test.tsx

@@ -147,7 +147,7 @@ describe('DashboardPageProxy', () => {
         act(() => {
           setup({
             route: { routeName: DashboardRoutes.Home, component: () => null, path: '/' },
-            match: { params: {}, isExact: true, path: '/', url: '/' },
+            match: { params: { uid: '' }, isExact: true, path: '/', url: '/' },
           });
         });
 
@@ -176,7 +176,14 @@ describe('DashboardPageProxy', () => {
         act(() => {
           setup({
             route: { routeName: DashboardRoutes.Home, component: () => null, path: '/' },
-            match: { params: {}, isExact: true, path: '/', url: '/' },
+            match: {
+              params: {
+                uid: '',
+              },
+              isExact: true,
+              path: '/',
+              url: '/',
+            },
           });
         });
 

public/app/features/dashboard/containers/DashboardPageProxy.tsx

@@ -54,7 +54,7 @@ function DashboardPageProxy(props: DashboardPageProxyProps) {
     return null;
   }
 
-  if (dashboard.value && dashboard.value.dashboard.uid && dashboard.value.dashboard.uid !== props.match.params.uid) {
+  if (dashboard?.value?.dashboard?.uid !== props.match.params.uid) {
     return null;
   }