dashboard: collapsible credentials block; autofill: fix Pult username field

- Credentials wrapped in svc-credentials-wrap with toggle button and chevron
- Credentials hidden by default, expand on click (CSS class toggle)
- Autofill: add autofocus selector to catch fields like Zabbix name=name
- Autofill: re-fill username after password fill if Pult/Zabbix cleared it

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

universal-runtime/manager.py

@@ -49,7 +49,8 @@ _AUTOFILL_CONTENT_JS = r"""
       'input[name*="email" i]:not([type="password"]):not([type="hidden"]), ' +
       'input[id*="user" i]:not([type="password"]):not([type="hidden"]), ' +
       'input[id*="login" i]:not([type="password"]):not([type="hidden"]), ' +
-      'input[id*="email" i]:not([type="password"]):not([type="hidden"])'
+      'input[id*="email" i]:not([type="password"]):not([type="hidden"]), ' +
+      'input[autofocus]:not([type="password"]):not([type="hidden"]):not([type="checkbox"]):not([type="radio"])'
     );
     for (const el of candidates) {
       if (isVisible(el)) return el;
@@ -126,6 +127,11 @@ _AUTOFILL_CONTENT_JS = r"""
         console.log('[PortalAutofill] password filled');
       }
     }
+    // Some apps (e.g. Zabbix) clear username after password events — re-fill if needed
+    if (CREDS.login && u && u.value !== CREDS.login) {
+      setNativeValue(u, CREDS.login);
+      console.log('[PortalAutofill] user re-filled after password');
+    }
   }
 
   // Watch for SPA re-renders clearing the fields and re-fill continuously