The previous implementation POSTed Forgejo's run-page rerun web route,
which is CSRF-gated and answers a bare token POST with 404 — so the verb
never actually re-ran anything against the agent token.
Rework it to dispatch a fresh run of the workflow via the
GitHub-compatible workflow-dispatch API
(POST /repos/<o>/<r>/actions/workflows/<workflow>/dispatches {"ref":<branch>}),
which accepts a plain agent token (verified end-to-end on Forgejo 15.0.3).
A dispatched run is equivalent to the old empty-commit retrigger, minus
the commit.
The branch is resolved from exactly one of --pr (the PR head branch),
--run (branch + workflow looked up from that run in the Actions runs
list), or --branch (directly); --workflow picks the workflow file for
--pr/--branch (default ci.yml). Dispatch re-runs the whole workflow, so
the old --job single-job variant is dropped.
Also add workflow_dispatch to .forgejo/workflows/ci.yml for explicitness
(Forgejo 15.0.3 dispatches the pull_request workflow without it, but the
trigger makes the API path intent-clear and cross-version robust), remove
the now-unused Client::post_web_no_content, and update docs/tools/forge.md.
When a CI run fails for a transient reason (remote-builder flap, cold-daemon
window, act_runner hiccup) the only retrigger path was an empty commit, which
litters PR history and forces a force-push to clean up. This verb POSTs the
rerun action directly.
- `ci-rerun --run <n>` re-runs all jobs of a run (run number = the `runs/<n>`
the UI shows, same value ci-log / artifact-get take, surfaced as a CI
context's target_url by pr-status).
- `--pr <n>` resolves the run from the PR head sha's CI status target_url.
- `--job <i>` re-runs a single job.
Forgejo exposes no REST endpoint for rerunning a run, so this rides the run
page's web routes (`<base>/<owner>/<repo>/actions/runs/<n>[/jobs/<i>]/rerun`)
via a new `Client::post_web_no_content` (web base like post_json_web, tolerates
the redirect/empty response the rerun handler returns). Mirrors ci-log's
web-route approach + auth path.
docs/tools/forge.md updated with the verb.
