fix: sync built-in channel enablement across config paths

src/plugins/config-state.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import { normalizePluginsConfig } from "./config-state.js";
+import { normalizePluginsConfig, resolveEffectiveEnableState } from "./config-state.js";
 
 describe("normalizePluginsConfig", () => {
   it("uses default memory slot when not specified", () => {
@@ -48,3 +48,48 @@ describe("normalizePluginsConfig", () => {
     expect(result.slots.memory).toBe("memory-core");
   });
 });
+
+describe("resolveEffectiveEnableState", () => {
+  it("enables bundled channels when channels.<id>.enabled=true", () => {
+    const normalized = normalizePluginsConfig({
+      enabled: true,
+    });
+    const state = resolveEffectiveEnableState({
+      id: "telegram",
+      origin: "bundled",
+      config: normalized,
+      rootConfig: {
+        channels: {
+          telegram: {
+            enabled: true,
+          },
+        },
+      },
+    });
+    expect(state).toEqual({ enabled: true });
+  });
+
+  it("keeps explicit plugin-level disable authoritative", () => {
+    const normalized = normalizePluginsConfig({
+      enabled: true,
+      entries: {
+        telegram: {
+          enabled: false,
+        },
+      },
+    });
+    const state = resolveEffectiveEnableState({
+      id: "telegram",
+      origin: "bundled",
+      config: normalized,
+      rootConfig: {
+        channels: {
+          telegram: {
+            enabled: true,
+          },
+        },
+      },
+    });
+    expect(state).toEqual({ enabled: false, reason: "disabled in config" });
+  });
+});