fix: Micro-fixes: dead comment, timer null, AbortController, address guard, catch reset (#261)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

landing/src/components/LiveStats.vue

@@ -362,12 +362,15 @@ const totalSupply = computed(() => {
 
 async function fetchStats() {
   try {
+    const controller = new AbortController();
+    const timeout = setTimeout(() => controller.abort(), 10000);
     const endpoint = `${window.location.origin}/api/graphql`;
     const response = await fetch(endpoint, {
       method: 'POST',
       headers: {
         'Content-Type': 'application/json',
       },
+      signal: controller.signal,
       body: JSON.stringify({
         query: `
           query ProtocolStats {
@@ -391,6 +394,7 @@ async function fetchStats() {
       }),
     });
 
+    clearTimeout(timeout);
     if (!response.ok) {
       throw new Error('Failed to fetch stats');
     }
@@ -437,6 +441,7 @@ onMounted(async () => {
   // Escalate to error state if no data arrives within the timeout window
   loadingTimer = window.setTimeout(() => {
     if (!stats.value) error.value = true;
+    loadingTimer = null;
   }, LOADING_TIMEOUT_MS);
   await fetchStats();
   fetchEthPrice();

landing/src/components/WalletCard.vue

@@ -40,6 +40,7 @@ async function fetchWalletData(addr: string) {
     stats.value = json?.data?.statss?.items?.[0] ?? null;
   } catch {
     holder.value = null;
+    stats.value = null;
   } finally {
     loading.value = false;
   }