feat: add update check failure dialog, ability to skip update check

src/screens/Launch.svelte

@@ -150,6 +150,8 @@
 
   let downloadingUpdate = $state(false);
 
+  let updateCheckFailed = $state(false);
+
   let dragAndDrop = useDropZone({
     onDrop: async (file) => {
       const firstFile = file[0];
@@ -244,7 +246,7 @@
     }
   };
 
-  const launch = async () => {
+  const launch = async (skipUpdateCheck = false) => {
     if ($launching) return;
     launchInfo = 'Checking if osu! is already running...';
     launching.set(true);
@@ -301,6 +303,7 @@
       }
     }
 
+    if (!skipUpdateCheck) {
       try {
         launchInfo = 'Looking for file updates...';
         let launchStream = $launcherStream;
@@ -335,8 +338,10 @@
         launching.set(false);
         return;
       }
+    }
 
     try {
+      if (!skipUpdateCheck) {
         const streamInfo = await ezppfarm.latestBuildVersion('stable40');
         if (!streamInfo) {
           sileo.error({
@@ -344,6 +349,7 @@
             description: 'Failed to check for updates, maybe osu! is down?',
           });
           launching.set(false);
+          updateCheckFailed = true;
           return;
         }
 
@@ -403,6 +409,7 @@
         } else {
           launchInfo = 'You are up to date!';
         }
+      }
       if ($currentUser) {
         const [username, password] = await Promise.all([
           config.value<string>('username').get(''),
@@ -1027,6 +1034,47 @@
   </AlertDialog.Content>
 </AlertDialog.Root>
 
+<AlertDialog.Root open={updateCheckFailed}>
+  <AlertDialog.Content
+    class="bg-theme-950 border-theme-800 p-0 max-w-2xl"
+    escapeKeydownBehavior="ignore"
+    interactOutsideBehavior="ignore"
+  >
+    <div
+      class="flex flex-col items-center justify-center border-b border-theme-800 bg-black/40 rounded-t-lg p-3"
+    >
+      <Import size={40} />
+      <span class="font-semibold text-xl">Update check failed</span>
+    </div>
+
+    <div
+      class="flex flex-col items-center text-sm text-center bg-theme-900 border border-theme-800 rounded-lg mx-3 p-3"
+    >
+      <p class="mb-4">Failed to check for updates.</p>
+      <p>Do you want to launch anyway?</p>
+    </div>
+    <div class="flex items-center justify-center mb-3 gap-4 mt-4">
+      <Button
+        class="min-w-28"
+        onclick={async () => {
+          await launch(true);
+          updateCheckFailed = false;
+        }}
+      >
+        Launch anyways
+      </Button>
+      <Button
+        variant="outline"
+        onclick={async () => {
+          updateCheckFailed = false;
+        }}
+      >
+        Abort
+      </Button>
+    </div>
+  </AlertDialog.Content>
+</AlertDialog.Root>
+
 <AlertDialog.Root open={$newVersion === undefined && !!droppedTheme && !themeInstalling}>
   <AlertDialog.Content
     class="bg-theme-950 border-theme-800 p-0 max-w-2xl"