refactor: add inbound context helpers

src/channels/chat-type.test.ts

@@ -0,0 +1,20 @@
+import { describe, expect, it } from "vitest";
+
+import { normalizeChatType } from "./chat-type.js";
+
+describe("normalizeChatType", () => {
+  it("normalizes common inputs", () => {
+    expect(normalizeChatType("direct")).toBe("direct");
+    expect(normalizeChatType("dm")).toBe("direct");
+    expect(normalizeChatType("group")).toBe("group");
+    expect(normalizeChatType("channel")).toBe("channel");
+    expect(normalizeChatType("room")).toBe("channel");
+  });
+
+  it("returns undefined for empty/unknown values", () => {
+    expect(normalizeChatType(undefined)).toBeUndefined();
+    expect(normalizeChatType("")).toBeUndefined();
+    expect(normalizeChatType("nope")).toBeUndefined();
+  });
+});
+