feat: add talk voice alias map

src/config/config.test.ts

@@ -221,3 +221,32 @@ describe("talk api key fallback", () => {
     });
   });
 });
+
+describe("talk.voiceAliases", () => {
+  it("accepts a string map of voice aliases", async () => {
+    vi.resetModules();
+    const { validateConfigObject } = await import("./config.js");
+    const res = validateConfigObject({
+      talk: {
+        voiceAliases: {
+          Clawd: "EXAVITQu4vr4xnSDxMaL",
+          Roger: "CwhRBWXzGAHq8TQ4Fs17",
+        },
+      },
+    });
+    expect(res.ok).toBe(true);
+  });
+
+  it("rejects non-string voice alias values", async () => {
+    vi.resetModules();
+    const { validateConfigObject } = await import("./config.js");
+    const res = validateConfigObject({
+      talk: {
+        voiceAliases: {
+          Clawd: 123,
+        },
+      },
+    });
+    expect(res.ok).toBe(false);
+  });
+});