Fix music optional auth to detect existing logged-in session on page load

www/js/version.json

@@ -1,5 +1,5 @@
 {
-  "VERSION": "v0.7.2",
-  "VERSION_NUMBER": "0.7.2",
-  "BUILD_DATE": "2026-04-19T17:37:32.473Z"
+  "VERSION": "v0.7.3",
+  "VERSION_NUMBER": "0.7.3",
+  "BUILD_DATE": "2026-04-19T17:43:13.562Z"
 }

www/music.html

@@ -1617,6 +1617,21 @@ import { GreyscaleAPI } from './js/greyscale-api.mjs';
       return message.includes('authentication required');
     }
 
+    async function tryGetPubkeyWithoutPrompt({ attempts = 8, delayMs = 350 } = {}) {
+      for (let i = 0; i < attempts; i += 1) {
+        try {
+          const pubkey = await getPubkey();
+          if (pubkey) return pubkey;
+        } catch {
+          // Signer can attach slightly after initial script execution.
+        }
+        if (i < attempts - 1) {
+          await new Promise((resolve) => setTimeout(resolve, delayMs));
+        }
+      }
+      return '';
+    }
+
     function isReadOnlyTargetMode() {
       return Boolean(targetPubkey && (!currentPubkey || targetPubkey !== currentPubkey));
     }
@@ -1695,13 +1710,8 @@ import { GreyscaleAPI } from './js/greyscale-api.mjs';
         throw error;
       }
 
-      try {
-        currentPubkey = await getPubkey();
-        isAuthenticated = Boolean(currentPubkey);
-      } catch {
-        currentPubkey = null;
-        isAuthenticated = false;
-      }
+      currentPubkey = await tryGetPubkeyWithoutPrompt();
+      isAuthenticated = Boolean(currentPubkey);
     }
 
     async function initializeAuthenticatedPageFeatures() {