Fix Space Engineers player log parsing

Use real SE dedicated log patterns:
- Join:  'OnConnectedClient <Name> attempt'
- Leave: 'User left <Name>' (successful) / 'User left [<steamid>]' (failed attempt)

Unresolved leaves pop the oldest pending entry so failed connection attempts
don't stick in the player list.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

gsm-backend/services/ssh.js

@@ -701,14 +701,13 @@ export async function getSpaceEngineersPlayers(server) {
   try {
     const ssh = await getConnection(server.host, server.sshUser);
 
-    // SE logs connect/disconnect lines through the wine-wrapped dedicated server.
-    // Typical patterns emitted by SpaceEngineersDedicated:
-    //   "User <name> joined"          / "User <name> connected"
-    //   "User <name> left"            / "User <name> disconnected"
-    //   "Player '<name>' connected"   / "Player '<name>' disconnected"
+    // SE (via SpaceEngineersDedicated.exe under wine) emits:
+    //   Join:  "OnConnectedClient <Name> attempt"
+    //   Leave (resolved):   "User left <Name>"
+    //   Leave (unresolved): "User left [<steamid-prefix>...]"  (failed/kicked attempt)
     const result = await ssh.execCommand(
-      `docker logs --tail 2000 ${server.containerName} 2>&1 | ` +
-      `grep -iE "user .* (joined|connected|left|disconnected)|player '.*' (connected|disconnected)" | tail -200`
+      `docker logs --tail 3000 ${server.containerName} 2>&1 | ` +
+      `grep -E "OnConnectedClient .* attempt|User left " | tail -300`
     );
 
     const players = new Map();
@@ -716,10 +715,20 @@ export async function getSpaceEngineersPlayers(server) {
 
     for (const line of lines) {
       let m;
-      if ((m = line.match(/Player '([^']+)' connected/i))) { players.set(m[1], true); continue; }
-      if ((m = line.match(/Player '([^']+)' disconnected/i))) { players.delete(m[1]); continue; }
-      if ((m = line.match(/User\s+(.+?)\s+(?:joined|connected)/i))) { players.set(m[1].trim(), true); continue; }
-      if ((m = line.match(/User\s+(.+?)\s+(?:left|disconnected)/i))) { players.delete(m[1].trim()); continue; }
+      if ((m = line.match(/OnConnectedClient\s+(\S+)\s+attempt/))) {
+        players.set(m[1], true);
+        continue;
+      }
+      if ((m = line.match(/User left\s+(.+?)\s*$/))) {
+        const token = m[1].trim();
+        if (token.startsWith('[')) {
+          // unresolved leave (failed connection) — drop oldest pending entry
+          const firstKey = players.keys().next().value;
+          if (firstKey !== undefined) players.delete(firstKey);
+        } else {
+          players.delete(token);
+        }
+      }
     }
 
     const playerList = Array.from(players.keys());