Standard `git revert` of #4260.
Its client-side stale-asset recovery is net-negative during normal
deploys:
- The `fetch` interception treats any `?_data=` request (Remix loader
**and** action traffic) as a navigation and, on a build-id mismatch,
`location.assign`es the tab to the fetched URL — an open dashboard tab
can be hard-navigated to a raw data URL during a rolling deploy, losing
unsaved input.
- Any transient `/build` asset error (a network blip, an extension, an
unrelated failed dynamic import) blanks the page behind a full-screen
overlay for ~60s before offering a manual reload.
- It serialized form field values to `sessionStorage` to restore them
across the reload.
This returns the webapp to the pre-#4260 baseline as a fast, low-risk
step.
Follow-ups (separate PRs):
- a minimal reload-only recovery to replace this,
- restore the unrelated `.claude/rules/server-apps.md` docs tidy-up from
#4260 (via cherry-pick),
- a load-balancer stickiness change addressing the root cause.
nicktrn
051d7080d6