Keep hidden tmux clients out of window sizing

Sources/App/TmuxPaneSplitter.swift

@@ -88,6 +88,20 @@ struct TmuxPaneSplitter: Sendable {
     static func supportsPaneSplitting(
         version: String,
         host: CommandHost
+    ) -> Bool {
+        supportsExactClientTargeting(version: version, host: host)
+    }
+
+    static func supportsClientSizing(
+        version: String,
+        host: CommandHost
+    ) -> Bool {
+        supportsExactClientTargeting(version: version, host: host)
+    }
+
+    private static func supportsExactClientTargeting(
+        version: String,
+        host: CommandHost
     ) -> Bool {
         guard platform(for: host) == .posix else { return false }
         let fields = version.split(whereSeparator: \.isWhitespace)

Sources/Tmux/TmuxAttachmentInfo.swift

@@ -377,7 +377,8 @@ public struct TmuxAttachmentInfo: Equatable, Sendable {
             )
         }
         let attach: String
-        if let protectedWorkspacePath, launchMode != .attachOnly {
+        if let protectedWorkspacePath,
+           launchMode != .attachOnly {
             let protectedAttach: String
             if let remoteKwtCommandPrelude {
                 let kwtAttach = remoteKwtCommandPrelude