Features/improve api client

apps/api-runner/README.md

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+# @mydevtools/api-runner
+
+Headless runner for [mydevtools](https://mydevtools.tech) API client collections — Postman / Newman compatible.
+
+Same scripts, same `pm.*` API, same JUnit output as the web runner.
+
+## Install
+
+```bash
+npm i -g @mydevtools/api-runner
+```
+
+## Run
+
+```bash
+mydevtools-api run my-collection.json
+mydevtools-api run my-collection.json --env prod.env.json --data users.csv
+mydevtools-api run my-collection.json --reporter junit --reporter-out report.xml --bail
+```
+
+## Flags
+
+| Flag | Description |
+|---|---|
+| `--data <file>` | CSV or JSON-array data file. One iteration per row; row keys override `{{vars}}`. |
+| `--env <file>` | Postman Environment v2 export. Enabled values become the base `{{var}}` map. |
+| `--iterations <N>` | Iterations when no data file is given. Default 1. |
+| `--reporter <name>` | `cli` (default) or `junit`. |
+| `--reporter-out <path>` | Required for `--reporter junit`. |
+| `--bail` | Stop on the first failing assertion / network error. |
+
+## Exit codes
+
+| Code | Meaning |
+|---|---|
+| 0 | All tests passed |
+| 1 | Some tests / requests failed |
+| 2 | Usage error |
+
+## Differences vs the web runner (v0.1)
+
+- No cookie jar (Node `fetch` has no jar) — provide auth via env vars.
+- No OAuth refresh flow — pre-mint a bearer token and put it in env.
+- No SSE / streaming (the web has `/api/proxy-stream`; the CLI does plain `await response.text()`).
+- No GraphQL introspection.
+
+Everything else — scripts, env mutations, `{{response.body.x}}` chaining,
+folder inheritance, data-driven iterations, JUnit XML — matches the web runner
+bit-for-bit.

apps/api-runner/dist/csv.d.ts

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+/** Same CSV/JSON data-file parser as the web app — verbatim port for portability. */
+export declare function parseCsv(text: string): Record<string, string>[];
+export declare function parseDataFile(text: string): Record<string, string>[];

apps/api-runner/dist/index.d.ts

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+#!/usr/bin/env node
+/**
+ * mydevtools-api CLI.
+ * Headless equivalent of the web-side collection runner. Same scripts, same
+ * substitution layering, same JUnit output — runs over a Postman v2.1 export.
+ */
+export {};

apps/api-runner/dist/junit.d.ts

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+/** JUnit XML emitter — port of `apps/web/src/lib/runner/junit.ts`. */
+import type { RequestRunResult } from "./types.js";
+export declare function buildJUnitXml(results: RequestRunResult[], suiteName: string): string;