feat(instances): beacon on connect and relay self-entry

apps/macos/Sources/Clawdis/ControlChannel.swift

@@ -1,5 +1,6 @@
 import Foundation
 import OSLog
+import SwiftUI
 
 struct ControlHeartbeatEvent: Codable {
     let ts: Double
@@ -91,6 +92,7 @@ final class ControlChannel: ObservableObject {
             self.state = .connecting
             try await AgentRPC.shared.start()
             self.state = .connected
+            PresenceReporter.shared.sendImmediate(reason: "connect")
         } catch {
             self.state = .degraded(error.localizedDescription)
         }

apps/macos/Sources/Clawdis/PresenceReporter.swift

@@ -39,6 +39,11 @@ final class PresenceReporter {
         }
     }
 
+    /// Fire an immediate presence beacon (e.g., right after connecting).
+    func sendImmediate(reason: String = "connect") {
+        Task { await self.push(reason: reason) }
+    }
+
     private static func composePresenceSummary(mode: String, reason: String) -> String {
         let host = Host.current().localizedName ?? "unknown-host"
         let ip = Self.primaryIPv4Address() ?? "ip-unknown"