fix: use canonical main session keys in apps

apps/macos/Sources/ClawdbotProtocol/GatewayModels.swift

@@ -245,6 +245,31 @@ public struct StateVersion: Codable, Sendable {
     }
 }
 
+public struct SessionDefaults: Codable, Sendable {
+    public let defaultagentid: String
+    public let mainkey: String
+    public let mainsessionkey: String
+    public let scope: String?
+
+    public init(
+        defaultagentid: String,
+        mainkey: String,
+        mainsessionkey: String,
+        scope: String?
+    ) {
+        self.defaultagentid = defaultagentid
+        self.mainkey = mainkey
+        self.mainsessionkey = mainsessionkey
+        self.scope = scope
+    }
+    private enum CodingKeys: String, CodingKey {
+        case defaultagentid = "defaultAgentId"
+        case mainkey = "mainKey"
+        case mainsessionkey = "mainSessionKey"
+        case scope
+    }
+}
+
 public struct Snapshot: Codable, Sendable {
     public let presence: [PresenceEntry]
     public let health: AnyCodable
@@ -252,6 +277,7 @@ public struct Snapshot: Codable, Sendable {
     public let uptimems: Int
     public let configpath: String?
     public let statedir: String?
+    public let sessiondefaults: SessionDefaults?
 
     public init(
         presence: [PresenceEntry],
@@ -259,7 +285,8 @@ public struct Snapshot: Codable, Sendable {
         stateversion: StateVersion,
         uptimems: Int,
         configpath: String?,
-        statedir: String?
+        statedir: String?,
+        sessiondefaults: SessionDefaults?
     ) {
         self.presence = presence
         self.health = health
@@ -267,6 +294,7 @@ public struct Snapshot: Codable, Sendable {
         self.uptimems = uptimems
         self.configpath = configpath
         self.statedir = statedir
+        self.sessiondefaults = sessiondefaults
     }
     private enum CodingKeys: String, CodingKey {
         case presence
@@ -275,6 +303,7 @@ public struct Snapshot: Codable, Sendable {
         case uptimems = "uptimeMs"
         case configpath = "configPath"
         case statedir = "stateDir"
+        case sessiondefaults = "sessionDefaults"
     }
 }