Preserve folder Unpin intent during Pin saves

[alexphillips-dev]

What changed

• retain one latest reversible Pin or Unpin intent while the same folder save is in flight
• capture the requested pinned state when Docker and VM menu actions are selected
• preserve existing duplicate suppression for all actions that do not explicitly opt into queueing
• add executable shared-runner and Chromium regression coverage
• package dev version 2026.07.28.08 with curated notes and regenerated integrity/SBOM metadata

Root cause

The folder row moves optimistically as soon as Pin begins, but the preference save can remain active for nearly a second. Selecting Unpin during that window reached the shared safety runner while the same action key was busy. The runner silently returned an in-flight skip result, so the first Unpin selection was discarded and only a later click executed.

Validation

• focused pin, action-runner, Docker, and VM tests
• lint and test lanes: 906 passed, 1 intentionally skipped
• Chromium fixture browser lane: 32 passed, including queued Unpin intent
• runtime performance budgets
• release, install, documentation, dead-code, performance, and deterministic build guards
• archive checksum and shipped-source byte comparisons