[com55]

Backlog follow-up after clearing Dependabot PRs #112 and #119–#125 (all merged). No version bump; do not release from this PR.

Done

1. Reveal tab isolation. Only the last-focused editor tab handles a dashboard reveal (card, reveal, ack, sidebar). Other open editor tabs no longer switch their sidebar to AI Access.
2. Proposal deep-link scroll. selectTab skips both the immediate and rAF scrollTo(0, 0) when a #proposal= deep-link is present, so it no longer cancels scrollIntoView.
3. Last-used flush. First OAuth client use (never-used → used) persists immediately so "Never used" cannot be lost across a restart. Later lastUsedAt updates stay throttled.
4. "Landed after withdraw" badge. Its own status-pill landed-after-withdraw style (amber), distinct from grey withdrawn. Also exposed landedAfterWithdraw on the lean proposal list/get API so the badge actually renders in the dashboard (it was stored but not presented).
5. Section heading focus. section.panel > h2:focus has no thick outline; :focus-visible uses a 2px accent outline.
6. release.yml prerelease detection. Strip + build metadata first, then treat as prerelease only if the remainder contains -. Documented in the workflow and docs/releasing.md (0.2.0+build is stable; 0.2.0-beta.13+build is a prerelease).
7. Install docs. README and docs/releasing.md use a generic vX.Y.Z tarball URL and link to the Releases page. The release workflow appends the exact npm i command to prerelease notes.
8. Label switch test. Flow request then node request switches the card button from "Go to flow" to "Go to node".

Skipped

• Editor-change detection relies on flows:started snapshot. Not trivial: it is tied to the deploy/live-observer lifecycle rather than a small UI fix. Left for a later design change.

Please review before merge. Do not release.