fix: restore bot user filtering lost during worktree merge

The prefix-match bot filtering (ninbot, jambot, ninjam) in
ChannelStripArea was lost when worktree merges overwrote the file.
Restored from commit eaaba37.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mkschulze

juce/ui/ChannelStripArea.cpp

@@ -386,8 +386,16 @@ void ChannelStripArea::refreshFromUsers(const std::vector<NJClient::RemoteUserIn
         // Strip @IP suffix from username (e.g. "user@1.2.3.4" -> "user")
         juce::String userName(user.name);
         int atIdx = userName.lastIndexOfChar('@');
-        if (atIdx > 0)
-            userName = userName.substring(0, atIdx);
+        juce::String cleanName = (atIdx > 0) ? userName.substring(0, atIdx) : userName;
+
+        // Hide known bot users from the mixer (shared list with companion page).
+        // Prefix match handles variants like "ninbot_", "ninbot2", "Jambot_server".
+        if (cleanName.startsWithIgnoreCase("ninbot")
+            || cleanName.startsWithIgnoreCase("jambot")
+            || cleanName.startsWithIgnoreCase("ninjam"))
+            continue;
+
+        userName = cleanName;
 
         if (user.channels.size() <= 1)
         {