Add "Rerun failed job ➔" link to error comment footer (#355)

* add "Rerun failed job" link to error comment footer

* Remove issueNumber guard from rerun link

The rerun action only needs run_id — the issue number in the trigger
URL path is just a route segment requirement. Use 0 as a fallback
so the link is always shown when a run ID is available.

* Overload `[number]` path segment as `runId` for the rerun action

For the rerun trigger, the `[number]` path param now carries the
workflow run ID instead of an issue number. The rerun link changes
from `/trigger/o/r/ISSUE?action=rerun&run_id=RID` to
`/trigger/o/r/RID?action=rerun`.

- Remove `run_id` query param from page.tsx and searchParams type
- Add error handling around `reRunWorkflow` for invalid run IDs
- Drop `issueNumber` from `BuildErrorCommentBodyParams` and all
  rerun link builders (errorReport, exitHandler, postCleanup)

* Reorder validation: action first, then rerun, then issueNumber

* address review: remove early toolState assignment, restructure rerun into dedicated block

* revert self-contained rerun block, share auth logic via issueOrRunId

* improve error handling

* normalize runid early

---------

Co-authored-by: pullfrog[bot] <226033991+pullfrog[bot]@users.noreply.github.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Mateusz Burzyński <mateuszburzynski@gmail.com>

utils/workflow.ts

@@ -6,7 +6,7 @@ interface ResolveRunParams {
 }
 
 export interface ResolveRunResult {
-  runId: string;
+  runId: number | undefined;
   jobId: string | undefined;
 }
 
@@ -15,7 +15,9 @@ export interface ResolveRunResult {
  * Uses GITHUB_REPOSITORY and GITHUB_RUN_ID env vars.
  */
 export async function resolveRun(params: ResolveRunParams): Promise<ResolveRunResult> {
-  const runId = process.env.GITHUB_RUN_ID || "";
+  const runId = process.env.GITHUB_RUN_ID
+    ? Number.parseInt(process.env.GITHUB_RUN_ID, 10)
+    : undefined;
   const githubRepo = process.env.GITHUB_REPOSITORY;
   if (!githubRepo || !githubRepo.includes("/")) {
     throw new Error(`GITHUB_REPOSITORY env var must be set to "owner/repo", got: ${githubRepo}`);
@@ -28,7 +30,7 @@ export async function resolveRun(params: ResolveRunParams): Promise<ResolveRunRe
     const jobs = await params.octokit.rest.actions.listJobsForWorkflowRun({
       owner,
       repo,
-      run_id: parseInt(runId, 10),
+      run_id: runId,
     });
     const matchingJob = jobs.data.jobs.find((job) => job.name === jobName);
     if (matchingJob) {