chore: 初始化 trans-form 项目脚手架

- 基于 grill-me Q1-Q61 决策
- Vitest 测试与 CI workflow
- middleware: parseFilters 核心实现
- component: Vue3 TransForm 基础组件 + Storybook

Co-authored-by: Cursor <cursoragent@cursor.com>

DESIGN.md

@@ -0,0 +1,49 @@
+# trans-form-middleware — Design (Q1–Q61)
+
+Status: **implementation scaffold** (v0.1.0)
+
+Companion package: `@windychen/trans-form-component` (Vue 3 dynamic query form).
+
+## Role
+
+Receive component filter output → structured `{ field, query, op, value, logic?, values?, empty? }[]`. **No SQL generation.**
+
+## Key decisions
+
+| # | Decision |
+|---|----------|
+| 1–2 | Node.js pure JS; structured filters only |
+| 8 | Dual fields: `query` (code) + `op` (symbol) |
+| 14 | `mode`: pass-through (default) / flat / tree |
+| 24–25 | Zero deps; ESM only; no bundling (`src/index.js`) |
+| 38 | `empty: true` preserved by default |
+| 39 | Built-in `DEFAULT_OPERATOR_MAP`, merge via `operatorMap` |
+| 41 | Multi-function exports: `parseFilters`, `toTree`, `mapOperators`, … |
+| 44 | `strict` default false |
+| 46 | Multi-value: `value` (string) + `values` (parsed array) |
+| 49–50 | `allowedFields` required; `unknownField: 'error'` default |
+| 60 | Component emits all state flags; middleware skips `disabled` by default |
+| 61 | Also skips `hidden`; `skipEmpty` option controls empty items |
+
+## Output example
+
+```json
+[
+  {
+    "field": "tags",
+    "query": "IN",
+    "op": "IN",
+    "value": "a,b,c",
+    "values": ["a", "b", "c"],
+    "logic": "OR"
+  }
+]
+```
+
+## Operator map
+
+`EQ→=`, `NE→<>`, `GT→>`, `GTE→>=`, `LT→<`, `LTE→<=`, `LIKE→LIKE`, `IN→IN`, `NOT_IN→NOT IN`, `BETWEEN→BETWEEN`, `IS_NULL→IS NULL`, `IS_NOT_NULL→IS NOT NULL`
+
+## CI
+
+Copy of windychen-utils pattern: commit message must contain `chore` + `版本` + `更新` to trigger publish.