next-qa

在分支上添加测试并发起 PR，自动化 QA 回路的实现与合并流程。

在质量方向上跑一次自动迭代：照顾现有 QA PR，然后从 qa 队列挑一个加上测试或测试基础设施，开分支并发起 PR，绿灯后 squash‑merge。用于想让测试回路自动前进时（比如说“next qa”）。只添加测试和工具，从不改动产品源代码，目标是堵住行为回归而非改功能。

# Next QA — the quality-assurance loop

One invocation = one iteration:
**guard → pick ONE queued `qa` issue → build & record**.

This loop exists because the feature loop's only merge gate is `pnpm build` +
`pnpm check` — it verifies that the code *compiles*, never that it *behaves*.
On `auto-dev` that gate is the sole thing standing between an agent's mistake
and a merged change. This loop builds the missing half: an automated test
suite that runs in CI and turns behavioral regressions into red builds.

Its work flows through the **`auto-qa` integration branch**, which is a
sibling of `auto-dev`: both branch from `main`, both are promoted to `main`
by a human, and neither merges into the o