init: 从 cs-hand/hand-server-2/lib/shrimp 抽出独立仓

- 6 个框架源文件搬到 src/, 加 src/index.ts barrel 作为公共 API 入口
- package.json 标 private, main/types 指 src/index.ts (ts-node 消费方编译)
- 加 vitest + 22 条单元测试 (ILabel / MemoryShrimpCrud) 全通过
- examples/basic-admin/ 用 MemoryShrimpCrud 跑零 Mongo 依赖 demo

待办: ShrimpServer 强耦合 Mongo+JWT+Express, crudRegistry 用
.model 判断数据源, 这两个问题在 demo 中已暴露, 计划后续重构补到 90 分。

test/MemoryShrimpCrud.test.ts

@@ -0,0 +1,125 @@
+import { describe, it, expect, beforeEach } from "vitest"
+import { MemoryShrimpCrud } from "../src"
+
+interface IItem {
+    _id: string
+    name: string
+    price: number
+    tags?: string[]
+}
+
+describe("MemoryShrimpCrud", () => {
+    let crud: MemoryShrimpCrud<IItem>
+
+    beforeEach(() => {
+        crud = new MemoryShrimpCrud<IItem>()
+    })
+
+    it("add 返回带 _id 的新记录", async () => {
+        const item = await crud.add({ name: "苹果", price: 5 } as any)
+        expect(item._id).toBeDefined()
+        expect(item.name).toBe("苹果")
+        expect(item.price).toBe(5)
+    })
+
+    it("get 按 id 取记录", async () => {
+        const a = await crud.add({ name: "A", price: 1 } as any)
+        const fetched = await crud.get(a._id)
+        expect(fetched).toEqual(a)
+    })
+
+    it("get 不存在返回 null", async () => {
+        expect(await crud.get("missing")).toBeNull()
+    })
+
+    it("edit 部分更新", async () => {
+        const a = await crud.add({ name: "A", price: 1 } as any)
+        const updated = await crud.edit(a._id, { price: 99 })
+        expect(updated?.price).toBe(99)
+        expect(updated?.name).toBe("A")
+    })
+
+    it("delete 删除返回 true,再次删返回 false", async () => {
+        const a = await crud.add({ name: "A", price: 1 } as any)
+        expect(await crud.delete(a._id)).toBe(true)
+        expect(await crud.delete(a._id)).toBe(false)
+        expect(await crud.get(a._id)).toBeNull()
+    })
+
+    it("list 全量返回 + 分页字段", async () => {
+        await crud.add({ name: "A", price: 1 } as any)
+        await crud.add({ name: "B", price: 2 } as any)
+        const result = await crud.list()
+        expect(result.total).toBe(2)
+        expect(result.list).toHaveLength(2)
+    })
+
+    it("list where eq 过滤", async () => {
+        await crud.add({ name: "A", price: 1 } as any)
+        await crud.add({ name: "B", price: 2 } as any)
+        const result = await crud.list({ where: { name: { eq: "B" } } })
+        expect(result.total).toBe(1)
+        expect(result.list[0].name).toBe("B")
+    })
+
+    it("list where like 模糊匹配", async () => {
+        await crud.add({ name: "apple-juice", price: 1 } as any)
+        await crud.add({ name: "orange", price: 2 } as any)
+        const result = await crud.list({ where: { name: { like: "APP" } } })
+        expect(result.total).toBe(1)
+        expect(result.list[0].name).toBe("apple-juice")
+    })
+
+    it("list where gte/lte 范围过滤", async () => {
+        for (let i = 1; i <= 5; i++) await crud.add({ name: `n${i}`, price: i } as any)
+        const result = await crud.list({ where: { price: { gte: 2, lte: 4 } } })
+        expect(result.total).toBe(3)
+    })
+
+    it("list order 排序", async () => {
+        await crud.add({ name: "B", price: 2 } as any)
+        await crud.add({ name: "A", price: 1 } as any)
+        await crud.add({ name: "C", price: 3 } as any)
+        const asc = await crud.list({ order: [["price", "asc"]] })
+        expect(asc.list.map(i => i.price)).toEqual([1, 2, 3])
+        const desc = await crud.list({ order: [["price", "desc"]] })
+        expect(desc.list.map(i => i.price)).toEqual([3, 2, 1])
+    })
+
+    it("list offset/limit 分页", async () => {
+        for (let i = 1; i <= 10; i++) await crud.add({ name: `n${i}`, price: i } as any)
+        const page2 = await crud.list({ offset: 3, limit: 3, order: [["price", "asc"]] })
+        expect(page2.list.map(i => i.price)).toEqual([4, 5, 6])
+        expect(page2.total).toBe(10)
+        expect(page2.totalPages).toBe(4)
+    })
+
+    it("findOne 按字段查找", async () => {
+        await crud.add({ name: "alice", price: 1 } as any)
+        await crud.add({ name: "bob", price: 2 } as any)
+        const found = await crud.findOne({ name: "bob" })
+        expect(found?.price).toBe(2)
+    })
+
+    it("clear 清空所有记录", async () => {
+        await crud.add({ name: "A", price: 1 } as any)
+        await crud.add({ name: "B", price: 2 } as any)
+        await crud.clear()
+        const result = await crud.list()
+        expect(result.total).toBe(0)
+    })
+
+    it("populateItems 旁挂 _label", async () => {
+        const tagCrud = new MemoryShrimpCrud<{ _id: string; name: string }>()
+        await tagCrud.add({ name: "热门" } as any)
+        await tagCrud.add({ name: "促销" } as any)
+
+        const itemCrud = new MemoryShrimpCrud<IItem>()
+        itemCrud.getRelatedCrud = (key) => key === "tag" ? tagCrud as any : undefined
+        const a = await itemCrud.add({ name: "苹果", price: 5, tags: ["1", "2"] } as any)
+
+        const items = [{ ...a }] as any[]
+        await itemCrud.populateItems(items, [{ moduleKey: "tag", key: "tags", labelKey: "name" }])
+        expect(items[0].tags_label).toEqual(["热门", "促销"])
+    })
+})