fix(config): lazy bootstrap markdown table defaults

src/config/markdown-tables.import.test.ts

@@ -0,0 +1,39 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const listBootstrapChannelPlugins = vi.hoisted(() =>
+  vi.fn(() => [
+    {
+      id: "signal",
+      messaging: {
+        defaultMarkdownTableMode: "bullets",
+      },
+    },
+  ]),
+);
+
+vi.mock("../channels/plugins/bootstrap-registry.js", () => ({
+  listBootstrapChannelPlugins,
+}));
+
+describe("markdown table defaults import behavior", () => {
+  beforeEach(() => {
+    vi.resetModules();
+    listBootstrapChannelPlugins.mockClear();
+  });
+
+  it("does not bootstrap channel plugins during module import", async () => {
+    const module = await import("./markdown-tables.js");
+
+    expect(module.DEFAULT_TABLE_MODES).toBeDefined();
+    expect(listBootstrapChannelPlugins).not.toHaveBeenCalled();
+  });
+
+  it("loads bootstrap defaults lazily on first access and memoizes them", async () => {
+    const { DEFAULT_TABLE_MODES, resolveMarkdownTableMode } = await import("./markdown-tables.js");
+
+    expect(DEFAULT_TABLE_MODES.get("signal")).toBe("bullets");
+    expect(listBootstrapChannelPlugins).toHaveBeenCalledTimes(1);
+    expect(resolveMarkdownTableMode({ channel: "signal" })).toBe("bullets");
+    expect(listBootstrapChannelPlugins).toHaveBeenCalledTimes(1);
+  });
+});

src/config/markdown-tables.ts

@@ -33,7 +33,23 @@ function getDefaultTableModes(): Map<string, MarkdownTableMode> {
   return cachedDefaultTableModes;
 }
 
-export const DEFAULT_TABLE_MODES = getDefaultTableModes();
+const EMPTY_DEFAULT_TABLE_MODES = new Map<string, MarkdownTableMode>();
+
+function bindDefaultTableModesMethod<TValue>(value: TValue): TValue {
+  if (typeof value !== "function") {
+    return value;
+  }
+  return value.bind(getDefaultTableModes()) as TValue;
+}
+
+export const DEFAULT_TABLE_MODES: ReadonlyMap<string, MarkdownTableMode> = new Proxy(
+  EMPTY_DEFAULT_TABLE_MODES,
+  {
+    get(_target, prop, _receiver) {
+      return bindDefaultTableModesMethod(Reflect.get(getDefaultTableModes(), prop));
+    },
+  },
+);
 
 const isMarkdownTableMode = (value: unknown): value is MarkdownTableMode =>
   value === "off" || value === "bullets" || value === "code" || value === "block";
@@ -64,7 +80,7 @@ export function resolveMarkdownTableMode(params: {
   accountId?: string | null;
 }): MarkdownTableMode {
   const channel = normalizeChannelId(params.channel);
-  const defaultMode = channel ? (DEFAULT_TABLE_MODES.get(channel) ?? "code") : "code";
+  const defaultMode = channel ? (getDefaultTableModes().get(channel) ?? "code") : "code";
   if (!channel || !params.cfg) {
     return defaultMode;
   }