Restore locked files if not all removed within 60 seconds

Removing one of the 3 AI-virus-protected files now starts a 60-second
window (tracked session-wide via LockedFilesRemovalDeadline). If the
other locked files aren't also removed before it expires, the virus
restores whichever ones were deleted and broadcasts a red warning to
the whole session, forcing players to coordinate the removal instead
of picking them off one at a time.

Also extends the Mercure broadcast payload with an optional 3rd
"messageType" element so pushed messages can render red (virus) or
green (mainframe) instead of always defaulting to green.

assets/game1.js

@@ -14,7 +14,7 @@ function subscribeToMercure(mercurePublicUrl, topic, myScreen) {
         const data = JSON.parse(event.data);
         console.log('[Mercure][game1] Update:', data);
 
-        // data is [sendTo, message]
+        // data is [sendTo, message, messageType?] - messageType defaults to 'mainframe' (green)
         if (Array.isArray(data) && data.length >= 2) {
           const sendTo = parseInt(data[0]);
           // Filter: 0 means everyone, otherwise must match myScreen
@@ -25,11 +25,7 @@ function subscribeToMercure(mercurePublicUrl, topic, myScreen) {
 
           const messageContainer = document.getElementById('message-container');
           if (messageContainer) {
-            const msgEl = document.createElement('div');
-            msgEl.className = 'message';
-            msgEl.textContent = data[1];
-            msgEl.style.color = '#0F0'; // Green for incoming messages
-            messageContainer.appendChild(msgEl);
+            appendResultMessage(messageContainer, data[1], data[2] || 'mainframe');
             window.scrollTo(0, document.body.scrollHeight);
             if(stillPlayingSound)
             playSound();