chore: fix vitest standalone configs and update package description (#11865)

* chore: fix vitest standalone configs and update package description

- vitest.live.config.ts and vitest.e2e.config.ts now extend root config
- Inherits testTimeout (120s), resolve.alias, pool, setupFiles, excludes
- ui/vitest.node.config.ts gets explicit 120s timeout
- package.json description updated for multi-channel AI gateway
- Removed unused src/utils/time-format.ts

* chore: filter inherited excludes in live/e2e vitest configs

* refactor: dedupe GroupPolicy/DmPolicy in extensions

Import from openclaw/plugin-sdk instead of re-declaring identical types.

vitest.live.config.ts

@@ -1,17 +1,15 @@
 import { defineConfig } from "vitest/config";
+import baseConfig from "./vitest.config.ts";
+
+const baseTest = (baseConfig as { test?: { exclude?: string[] } }).test ?? {};
+const exclude = (baseTest.exclude ?? []).filter((p) => p !== "**/*.live.test.ts");
 
 export default defineConfig({
+  ...baseConfig,
   test: {
-    pool: "forks",
+    ...baseTest,
     maxWorkers: 1,
     include: ["src/**/*.live.test.ts"],
-    setupFiles: ["test/setup.ts"],
-    exclude: [
-      "dist/**",
-      "apps/macos/**",
-      "apps/macos/.build/**",
-      "**/vendor/**",
-      "dist/OpenClaw.app/**",
-    ],
+    exclude,
   },
 });