fix(vscode): dismiss stale permission responses

[marius-kilocode]

PR #10822 changed SDK failures produced with throwOnError from structured top-level objects into real Error instances whose HTTP status and response body live under cause. The VS Code permission handler still inspected only top-level fields, so it stopped recognizing the 404 returned when another panel, auto-approve flow, or covered permission rule had already resolved the same request.

That race is expected because multiple mounted views can observe a permission before the backend resolution event reaches all of them. Since the stale detector missed the wrapped shape, selecting persistent permission rules could log Failed to save always-rules, show an error toast, and leave an obsolete prompt visible. This regressed the stale-prompt recovery introduced in #9450.

This change recognizes both the existing direct error shapes and the SDK-wrapped cause.status / cause.body shape. A stale save or reply now clears the request and refreshes pending permissions, while non-404 failures continue through the normal error path. Regression coverage exercises wrapped 404s in both persistence and reply paths and verifies that wrapped server errors are not misclassified.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

The implementation is correct. isNotFoundError now handles both the legacy direct-shape errors and the new SDK-wrapped Error with cause.status / cause.body, while preserving all existing detection paths. The test additions cover the two new code paths (save 404, reply 404) and add a negative case confirming non-404 SDK errors are not misclassified. The spyOn / mockRestore pair in the 500 test is clean with no leak risk. Changeset and description are both present and user-facing.

Files Reviewed (3 files)

• .changeset/dismiss-stale-permissions.md
• packages/kilo-vscode/src/kilo-provider/handlers/permission-handler.ts
• packages/kilo-vscode/tests/unit/permission-recovery.test.ts

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_{Review guidance: REVIEW.md from base branch main}