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

apps/macos/Sources/OpenClaw/DurationFormattingSupport.swift

@@ -0,0 +1,15 @@
+import Foundation
+
+enum DurationFormattingSupport {
+    static func conciseDuration(ms: Int) -> String {
+        if ms < 1000 { return "\(ms)ms" }
+        let s = Double(ms) / 1000.0
+        if s < 60 { return "\(Int(round(s)))s" }
+        let m = s / 60.0
+        if m < 60 { return "\(Int(round(m)))m" }
+        let h = m / 60.0
+        if h < 48 { return "\(Int(round(h)))h" }
+        let d = h / 24.0
+        return "\(Int(round(d)))d"
+    }
+}