app: start migrating bootstrap data fetching to TanStack Query (#22756)

packages/app/src/app.tsx

@@ -121,10 +121,10 @@ function SessionProviders(props: ParentProps) {
 function RouterRoot(props: ParentProps<{ appChildren?: JSX.Element }>) {
   return (
     <AppShellProviders>
-      <Suspense fallback={<Loading />}>
-        {props.appChildren}
-        {props.children}
-      </Suspense>
+      {/*<Suspense fallback={<Loading />}>*/}
+      {props.appChildren}
+      {props.children}
+      {/*</Suspense>*/}
     </AppShellProviders>
   )
 }
@@ -184,14 +184,22 @@ function ConnectionGate(props: ParentProps<{ disableHealthCheck?: boolean }>) {
   )
 
   return (
-    <Show
-      when={checkMode() === "blocking" ? !startupHealthCheck.loading : startupHealthCheck.state !== "pending"}
+    <Suspense
       fallback={
         <div class="h-dvh w-screen flex flex-col items-center justify-center bg-background-base">
           <Splash class="w-16 h-20 opacity-50 animate-pulse" />
         </div>
       }
     >
+      {/*<Show
+        when={checkMode() === "blocking" ? !startupHealthCheck.loading : startupHealthCheck.state !== "pending"}
+        fallback={
+          <div class="h-dvh w-screen flex flex-col items-center justify-center bg-background-base">
+            <Splash class="w-16 h-20 opacity-50 animate-pulse" />
+          </div>
+        }
+      >*/}
+      {checkMode() === "blocking" ? startupHealthCheck() : startupHealthCheck.latest}
       <Show
         when={startupHealthCheck()}
         fallback={
@@ -209,7 +217,8 @@ function ConnectionGate(props: ParentProps<{ disableHealthCheck?: boolean }>) {
       >
         {props.children}
       </Show>
-    </Show>
+      {/*</Show>*/}
+    </Suspense>
   )
 }