feat(nodes): add mac node mode + permission UX

apps/macos/Sources/Clawdis/InstancesStore.swift

@@ -44,6 +44,8 @@ final class InstancesStore {
     private var task: Task<Void, Never>?
     private let interval: TimeInterval = 30
     private var eventTask: Task<Void, Never>?
+    private var lastPresenceById: [String: InstanceInfo] = [:]
+    private var lastLoginNotifiedAtMs: [String: Double] = [:]
 
     private struct PresenceEventPayload: Codable {
         let presence: [PresenceEntry]
@@ -302,10 +304,37 @@ final class InstancesStore {
 
     private func applyPresence(_ entries: [PresenceEntry]) {
         let withIDs = self.normalizePresence(entries)
+        self.notifyOnNodeLogin(withIDs)
+        self.lastPresenceById = Dictionary(uniqueKeysWithValues: withIDs.map { ($0.id, $0) })
         self.instances = withIDs
         self.statusMessage = nil
         self.lastError = nil
     }
+
+    private func notifyOnNodeLogin(_ instances: [InstanceInfo]) {
+        for inst in instances {
+            guard let reason = inst.reason?.trimmingCharacters(in: .whitespacesAndNewlines) else { continue }
+            guard reason == "node-connected" else { continue }
+            if let mode = inst.mode?.lowercased(), mode == "local" { continue }
+
+            let previous = self.lastPresenceById[inst.id]
+            if previous?.reason == "node-connected", previous?.ts == inst.ts { continue }
+
+            let lastNotified = self.lastLoginNotifiedAtMs[inst.id] ?? 0
+            if inst.ts <= lastNotified { continue }
+            self.lastLoginNotifiedAtMs[inst.id] = inst.ts
+
+            let name = inst.host?.trimmingCharacters(in: .whitespacesAndNewlines)
+            let device = name?.isEmpty == false ? name! : inst.id
+            Task { @MainActor in
+                _ = await NotificationManager().send(
+                    title: "Node connected",
+                    body: device,
+                    sound: nil,
+                    priority: .active)
+            }
+        }
+    }
 }
 
 extension InstancesStore {