GatewayConnection: validate agent message

apps/macos/Sources/Clawdis/GatewayConnection.swift

@@ -165,9 +165,11 @@ extension GatewayConnection {
         channel: String? = nil,
         idempotencyKey: String = UUID().uuidString) async -> (ok: Bool, error: String?)
     {
+        let trimmed = message.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !trimmed.isEmpty else { return (false, "message empty") }
         do {
             let params: [String: Any] = [
-                "message": message,
+                "message": trimmed,
                 "sessionKey": sessionKey,
                 "thinking": thinking ?? "default",
                 "deliver": deliver,

apps/macos/Tests/ClawdisIPCTests/AgentRPCTests.swift

@@ -2,16 +2,21 @@ import Testing
 @testable import Clawdis
 @testable import ClawdisIPC
 
-@Suite(.serialized) struct AgentRPCTests {
+@Suite(.serialized) struct GatewayConnectionControlTests {
     @Test func statusFailsWhenProcessMissing() async {
-        let result = await AgentRPC.shared.status()
+        let result = await GatewayConnection.shared.status()
         // We don't assert ok because the worker may not be available in CI.
         // Instead, ensure the call returns without throwing and provides a message.
         #expect(result.ok == true || result.error != nil)
     }
 
     @Test func rejectEmptyMessage() async {
-        let result = await AgentRPC.shared.send(text: "", thinking: nil, sessionKey: "main", deliver: false, to: nil)
+        let result = await GatewayConnection.shared.sendAgent(
+            message: "",
+            thinking: nil,
+            sessionKey: "main",
+            deliver: false,
+            to: nil)
         #expect(result.ok == false)
     }
 }