refactor(macos): dedupe UI, pairing, and runtime helpers

apps/macos/Sources/OpenClaw/TextSummarySupport.swift

@@ -0,0 +1,16 @@
+import Foundation
+
+enum TextSummarySupport {
+    static func summarizeLastLine(_ text: String, maxLength: Int = 200) -> String? {
+        let lines = text
+            .split(whereSeparator: \.isNewline)
+            .map { $0.trimmingCharacters(in: .whitespacesAndNewlines) }
+            .filter { !$0.isEmpty }
+        guard let last = lines.last else { return nil }
+        let normalized = last.replacingOccurrences(of: "\\s+", with: " ", options: .regularExpression)
+        if normalized.count > maxLength {
+            return String(normalized.prefix(maxLength - 1)) + "…"
+        }
+        return normalized
+    }
+}