fix: route voice wake to main

apps/ios/Sources/Model/NodeAppModel.swift

@@ -38,8 +38,7 @@ final class NodeAppModel {
     init() {
         self.voiceWake.configure { [weak self] cmd in
             guard let self else { return }
-            let nodeId = UserDefaults.standard.string(forKey: "node.instanceId") ?? "ios-node"
-            let sessionKey = "node-\(nodeId)"
+            let sessionKey = "main"
             do {
                 try await self.sendVoiceTranscript(text: cmd, sessionKey: sessionKey)
             } catch {

apps/macos/Sources/Clawdis/Bridge/BridgeServer.swift

@@ -179,7 +179,7 @@ actor BridgeServer {
             guard !text.isEmpty else { return }
 
             let sessionKey = payload.sessionKey?.trimmingCharacters(in: .whitespacesAndNewlines).nonEmpty
-                ?? "node-\(nodeId)"
+                ?? "main"
 
             _ = await GatewayConnection.shared.sendAgent(GatewayAgentInvocation(
                 message: text,