feat(engine): createEngine 注入参数 + 消除模块级 driver 捕获（迁移阶段1-A1）

- createEngine(options) 支持 driver 注入，新增 engine.setDriver；
  缺省保持按平台自动选择的行为
- desktop/common-final/system-extended/window-extended 四文件模块加载时
  捕获 defaultEngine.driver 改为惰性 getDriver()：非 win32 import 不再抛错
  （此前 darwin 上 import 即炸），调用时才触发 platform_unsupported
- engine-driver.test 补注入/隔离/后置替换 4 例

packages/rpa-core/src/engine/runtime.cancel.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import type { CatalogComponent, FlowDefinition, FlowNode } from "../../types";
+import type { CatalogComponent, FlowDefinition, FlowNode } from "../types";
 import { validateFlowGraph, hasBlockingIssues } from "./graph-validator";
 import { register } from "./registry";
 import { RuntimeError } from "./types";
@@ -14,8 +14,9 @@ function makeFlow(partial: Partial<FlowDefinition> & { nodes: FlowNode[] }): Flo
     name: "测试流程",
     variables: [],
     nodes: partial.nodes,
-    edges: partial.edges || []
-  } as FlowDefinition;
+    edges: partial.edges || [],
+    meta: { createdAt: "2026-01-01T00:00:00Z", updatedAt: "2026-01-01T00:00:00Z", appVersion: "test" }
+  };
 }
 
 function node(id: string, componentId: string, overrides: Partial<FlowNode> = {}): FlowNode {
@@ -29,19 +30,20 @@ function node(id: string, componentId: string, overrides: Partial<FlowNode> = {}
   };
 }
 
-const fakeComponent = (id: string): CatalogComponent => ({
-  id,
-  name: id,
-  version: "1.0.0",
-  tags: [],
-  platformTag: null,
-  icon: "",
-  risk: "low",
-  fields: [],
-  output: { type: "any", description: "" },
-  slots: [],
-  functionCalls: []
-});
+const fakeComponent = (id: string): CatalogComponent =>
+  ({
+    id,
+    name: id,
+    version: "1.0.0",
+    tags: [],
+    platformTag: null,
+    icon: "",
+    risk: "low",
+    fields: [],
+    output: { label: "", key: "", suggestedName: "", valueTypes: [], fields: [] },
+    slots: [],
+    functionCalls: []
+  }) as unknown as CatalogComponent;
 
 const baseOptions = (signal: AbortSignal): RunFlowOptions => ({
   runId: "run_test",