阶段1-rpa-core建包: engine+31个纯Node能力迁入packages/rpa-core, 领域类型单一源化, createEngine工厂收拢模块级状态

- engine/(registry/types/runtime/expression)物理迁入包, 解耦shared/types(域类型归包, 宿主type-only re-export)
- 31个纯Node能力+27个测试迁入包; 宿主留守Electron/浏览器/AI依赖能力, index.ts经@rpa/core/capabilities拉起
- 新增createEngine()/defaultEngine: excel缓存/Excel句柄/db连接/FTP客户端/OCR实例/拟真设置挂引擎实例
- remaining-core子流程依赖改为host-bridge注入, 包内不再import宿主flows
- 宿主main/index.ts启动时注入子流程源; electron-vite/vitest/tsconfig配@rpa/core源码别名
- 验证: typecheck绿, 快照909个id diff为零, 332测试过(2个桌面冒烟因会话无交互SetForegroundWindow被拒, 环境阻塞)

scripts/app-system-tests.test.mjs

@@ -5,8 +5,8 @@ import { afterEach, describe, expect, it } from "vitest";
 import { buildSuite, bundleRoot } from "./app-system-test-flows.mjs";
 import { installBundle, upgradeBundle, makeReport, caseResults } from "./app-system-tests.mjs";
 import { applyCatalogOverrides } from "./catalog-overrides.mjs";
-import { hasCapability } from "../src/main/capabilities/index.ts";
-import { runFlow } from "../src/main/engine/runtime.ts";
+import { hasCapability, runFlow } from "@rpa/core";
+import "../src/main/capabilities/index.ts";
 import { validateFlow } from "../src/renderer/src/validation/flowValidation.ts";
 
 const containers = new Set(["logic_control_try_catch", "logic_control_if_else"]);
@@ -58,7 +58,7 @@ describe("应用与系统测试流程包", () => {
       const options = component.fields.find(field => field.key === "into_type").options;
       expect(options.length).toBeGreaterThanOrEqual(4);
       for (const option of options) {
-        const output = await import("../src/main/engine/registry.ts").then(({ getHandler }) => getHandler(id)({}, { id: "type-test", componentId: id }, { val: 42, into_type: option.value }, component));
+        const output = await import("@rpa/core").then(({ getHandler }) => getHandler(id)({}, { id: "type-test", componentId: id }, { val: 42, into_type: option.value }, component));
         if (id === "Basic_JudgeDataType") expect(typeof output).toBe("boolean");
       }
     }