Fix persistent 429: bust JS cache, stagger all API calls sequentially

- Add ?v=2 cache busting to all JS script tags (old version was cached)
- Reduce nginx JS cache from 1y to 1h with must-revalidate
- fetchChainData now sequential (was 4 parallel requests per chain)
- Increase chain detection delay from 150ms to 300ms

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

Dockerfile

@@ -15,11 +15,15 @@ RUN echo 'server { \
         try_files $uri $uri/ /index.html; \
     } \
     \
-    # Cache static assets \
+    # Cache static assets (short TTL for JS to allow updates) \
-    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2)$ { \
+    location ~* \.(png|jpg|jpeg|gif|ico|svg|woff|woff2)$ { \
         expires 1y; \
         add_header Cache-Control "public, immutable"; \
     } \
+    location ~* \.(js|css)$ { \
+        expires 1h; \
+        add_header Cache-Control "public, must-revalidate"; \
+    } \
     \
     # Gzip compression \
     gzip on; \

js/safe-api.js

@@ -162,7 +162,7 @@ const SafeAPI = (() => {
             } catch (e) {
                 // Chain doesn't have this Safe or API error - skip
             }
-            await sleep(150);
+            await sleep(300);
         }
 
         return results;
@@ -173,12 +173,14 @@ const SafeAPI = (() => {
      * Returns { info, balances, outgoing, incoming }
      */
     async function fetchChainData(address, chainId) {
-        const [info, balances, outgoing, incoming] = await Promise.all([
+        // Fetch sequentially to avoid rate limits
-            getSafeInfo(address, chainId),
+        const info = await getSafeInfo(address, chainId);
-            getBalances(address, chainId),
+        await sleep(200);
-            getAllMultisigTransactions(address, chainId),
+        const balances = await getBalances(address, chainId);
-            getAllIncomingTransfers(address, chainId),
+        await sleep(200);
-        ]);
+        const outgoing = await getAllMultisigTransactions(address, chainId);
+        await sleep(200);
+        const incoming = await getAllIncomingTransfers(address, chainId);
 
         return { chainId, info, balances, outgoing, incoming };
     }

wallet-multichain-visualization.html

@@ -5,9 +5,9 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Multi-Chain Flow | rWallet.online</title>
     <script src="https://d3js.org/d3.v7.min.js"></script>
-    <script src="js/safe-api.js"></script>
+    <script src="js/safe-api.js?v=2"></script>
-    <script src="js/data-transform.js"></script>
+    <script src="js/data-transform.js?v=2"></script>
-    <script src="js/router.js"></script>
+    <script src="js/router.js?v=2"></script>
     <style>
         * { margin: 0; padding: 0; box-sizing: border-box; }
         body {

wallet-timeline-visualization.html

@@ -5,9 +5,9 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Balance River | rWallet.online</title>
     <script src="https://d3js.org/d3.v7.min.js"></script>
-    <script src="js/safe-api.js"></script>
+    <script src="js/safe-api.js?v=2"></script>
-    <script src="js/data-transform.js"></script>
+    <script src="js/data-transform.js?v=2"></script>
-    <script src="js/router.js"></script>
+    <script src="js/router.js?v=2"></script>
     <style>
         * { margin: 0; padding: 0; box-sizing: border-box; }
         body {

wallet-visualization.html

@@ -6,9 +6,9 @@
     <title>Single-Chain Flow | rWallet.online</title>
     <script src="https://d3js.org/d3.v7.min.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/d3-sankey@0.12.3/dist/d3-sankey.min.js"></script>
-    <script src="js/safe-api.js"></script>
+    <script src="js/safe-api.js?v=2"></script>
-    <script src="js/data-transform.js"></script>
+    <script src="js/data-transform.js?v=2"></script>
-    <script src="js/router.js"></script>
+    <script src="js/router.js?v=2"></script>
     <style>
         * { margin: 0; padding: 0; box-sizing: border-box; }
         body {