Add cache-busting deployment marker

index.html

@@ -568,7 +568,7 @@ footer{margin-top:34px;padding-top:22px;border-top:1px solid var(--border);color
   </section>
 
   <footer>
-    Paper trading only · Live prices from Polymarket's public Gamma API · Not financial advice ·
+    Build b59347a+cachefix · Paper trading only · Live prices from Polymarket's public Gamma API · Not financial advice ·
     <a class="market-link" href="https://github.com/theodore-song/polymarket-analyst" target="_blank" rel="noopener">Source on GitHub</a>
   </footer>
 </div>

vercel.json

@@ -0,0 +1,22 @@
+{
+  "headers": [
+    {
+      "source": "/",
+      "headers": [
+        {
+          "key": "Cache-Control",
+          "value": "no-store, max-age=0"
+        }
+      ]
+    },
+    {
+      "source": "/index.html",
+      "headers": [
+        {
+          "key": "Cache-Control",
+          "value": "no-store, max-age=0"
+        }
+      ]
+    }
+  ]
+}