fix(voice-call): speak inbound greeting for twilio answered calls

extensions/voice-call/src/manager.test.ts

@@ -111,8 +111,10 @@ describe("CallManager", () => {
     expect(manager.getCallByProviderCallId("request-uuid")).toBeUndefined();
   });
 
-  it("speaks initial message on answered for notify mode (non-Twilio)", async () => {
-    const { manager, provider } = createManagerHarness();
+  it.each(["plivo", "twilio"] as const)(
+    "speaks initial message on answered for notify mode (%s)",
+    async (providerName) => {
+      const { manager, provider } = createManagerHarness({}, new FakeProvider(providerName));
 
       const { callId, success } = await manager.initiateCall("+15550000002", undefined, {
         message: "Hello there",
@@ -121,7 +123,7 @@ describe("CallManager", () => {
       expect(success).toBe(true);
 
       manager.processEvent({
-      id: "evt-2",
+        id: `evt-2-${providerName}`,
         type: "call.answered",
         callId,
         providerCallId: "call-uuid",
@@ -132,7 +134,8 @@ describe("CallManager", () => {
 
       expect(provider.playTtsCalls).toHaveLength(1);
       expect(provider.playTtsCalls[0]?.text).toBe("Hello there");
-  });
+    },
+  );
 
   it("rejects inbound calls with missing caller ID when allowlist enabled", () => {
     const { manager, provider } = createManagerHarness({

extensions/voice-call/src/manager.ts

@@ -166,12 +166,6 @@ export class CallManager {
       return;
     }
 
-    // Twilio has provider-specific state for speaking (<Say> fallback) and can
-    // fail for inbound calls; keep existing Twilio behavior unchanged.
-    if (this.provider.name === "twilio") {
-      return;
-    }
-
     void this.speakInitialMessage(call.providerCallId);
   }