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/buildPullfrogFooter.ts

@@ -10,7 +10,7 @@ export interface AgentInfo {
 export interface WorkflowRunFooterInfo {
   owner: string;
   repo: string;
-  runId: string;
+  runId: number;
   /** optional job ID - if provided, will append /job/{jobId} to the workflow run URL */
   jobId?: string | undefined;
 }