refactor(src): split oversized modules

src/config/config.msteams.test.ts

@@ -0,0 +1,43 @@
+import { describe, expect, it, vi } from "vitest";
+
+describe("config msteams", () => {
+  it("accepts replyStyle at global/team/channel levels", async () => {
+    vi.resetModules();
+    const { validateConfigObject } = await import("./config.js");
+    const res = validateConfigObject({
+      channels: {
+        msteams: {
+          replyStyle: "top-level",
+          teams: {
+            team123: {
+              replyStyle: "thread",
+              channels: {
+                chan456: { replyStyle: "top-level" },
+              },
+            },
+          },
+        },
+      },
+    });
+    expect(res.ok).toBe(true);
+    if (res.ok) {
+      expect(res.config.channels?.msteams?.replyStyle).toBe("top-level");
+      expect(res.config.channels?.msteams?.teams?.team123?.replyStyle).toBe(
+        "thread",
+      );
+      expect(
+        res.config.channels?.msteams?.teams?.team123?.channels?.chan456
+          ?.replyStyle,
+      ).toBe("top-level");
+    }
+  });
+
+  it("rejects invalid replyStyle", async () => {
+    vi.resetModules();
+    const { validateConfigObject } = await import("./config.js");
+    const res = validateConfigObject({
+      channels: { msteams: { replyStyle: "nope" } },
+    });
+    expect(res.ok).toBe(false);
+  });
+});