Start the editor at the data's extent, and choose imagery that covers it - #182

Follow-up to #182, whose branch got this commit just after it merged.

Custom imagery declares no coverage, so #182's check treated it as
worldwide. A custom layer chosen on one workspace then followed the user
into workspaces it doesn't cover, and left them black.

- **We never pick custom imagery.** Only someone choosing it for that
workspace, or a `background=` in the URL, can show it. A new workspace
resets to imagery covering its whole extent.
- **A custom pick keeps its own template.** Rapid has one custom slot,
so setting a different custom URL on another workspace would otherwise
change this one.
- **`CLAUDE.md`** gets a "Background imagery" section with the order for
choosing imagery.

A custom layer chosen for a workspace always sticks there, since we
can't tell whether it covers the area.

**Testing:** only against fake imagery, not real Rapid. Lint, the type
check and unit tests pass with CI's commands. In e2e, everything passed
except the two sign-in tests that hard-code `localhost:3000`, because
the suite ran on port 3100 beside a dev server; CI's run on 3000 is the
full check.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

## Summary

Promote the current `staging` release to `production`.

This release introduces comprehensive GTFS Pathways editing in Rapid 3,
workspace merging with conflict resolution, expanded review workflows,
improved workspace creation permissions, and imagery enhancements
including Panoramax support. It also consolidates frontend API usage,
updates core dependencies, and improves deployment caching, loading, and
error reporting.

## Changes

### Features

- Added GTFS Pathways editing in Rapid 3, including:
  - Station and level navigation, editing, ordering, and validation.
- GTFS reference checking, connectivity rules, severity reporting, and
required-field validation.
  - POSM GeoJSON ZIP imports and GTFS Pathways exports.
  - TDEI export using the source dataset and agency GTFS feed.
  - Reference drawings displayed beneath map data.
  - Pathways review support in Rapid 3.
  - Related work: #155, #159, #163, #164, #167.
- Added workspace merging with:
  - Eligible target selection.
  - Three-way element merging.
  - Conflict detection and resolution.
  - Reference repair and merge validation.
  - Interactive conflict maps and details.
  - Related work: #145.
- Expanded review workflows:
  - Display open `fixme` items in the review queue.
  - Resolve TDEI dataset feedback directly from the review page.
  - Load every page of dataset feedback.
  - Related work: #158, #161, #165.
- Added Panoramax street-level imagery support (#185).
- Improved background imagery selection so it respects workspace
coverage, persists user selections, and starts the editor at the
workspace data extent (#168, #182, #183).
- Added project-group and role-based workspace creation checks, matching
backend creation rules (#154, #174, #180).
- Added selected-workspace TDEI metadata to the dashboard (#176).

### Bug fixes

- Prevented repeated authentication retries when Rapid receives OSM API
authorization failures (#157).
- Fixed GTFS Pathways level ordering, missing-level warnings, unresolved
references, export IDs, and multi-outline level handling.
- Stopped incorrectly flagging two-way escalators during Pathways
validation (#162).
- Fixed dashboard behavior for workspaces without map data (#160).
- Persisted dashboard project-group selection per user and corrected the
members-tab message shown to non-POC users (#186).
- Improved workspace creation rollback when OSM provisioning fails.
- Preserved selected imagery and custom imagery templates across
workspace changes.
- Improved editor loading and failure feedback (#172).

### Maintenance

- Consolidated workspace requests onto the primary API and removed
`VITE_NEW_API_URL` (#175).
- Updated core dependencies, including:
  - MapLibre GL 5 → 6.
  - Nuxt 4.4 → 4.6.
  - Vue and DOMPurify patch updates.
  - Related dependency updates: #170, #171.
- Added explicit deployment environment values for Sentry and filtered
non-actionable development and network errors (#177).
- Added an immediate SPA loading screen and long-lived caching for
hashed Nuxt assets while keeping build manifests uncached (#179).
- Added substantial unit and end-to-end coverage for Pathways, workspace
merging, creation permissions, review feedback, imagery, dashboard
selection, and API lifecycle behavior.

## Deployment considerations

- **API compatibility:** Production must expose the unified workspace
API routes used by this release, including workspace creation checks,
merge operations, workspace fixmes, and related lifecycle endpoints.
- **Configuration change:** `VITE_NEW_API_URL` is no longer used.
`VITE_API_URL` must point to the production API containing the
consolidated endpoints.
- **Editor configuration:** Verify the production `VITE_RAPID3_URL` and
Pathways-related service URLs before deployment.
- **Sentry:** The deployment workflow now sets `ENV=production`, which
is used as the Sentry environment.
- **Caching:** Hashed `/_nuxt/*` assets are cached for one year, while
build manifests remain uncached. Confirm Azure Static Web Apps applies
the updated routing configuration.
- **Dependency risk:** MapLibre GL is upgraded across a major version;
production map rendering should receive focused smoke testing.
- **Database migrations:** None identified in this frontend repository.
- Production has one unique previous release merge commit (#156), but
its tree matches the previous staging release; no separate
production-only code changes were identified.

## Testing

Tests were added or updated throughout this release, but no test
commands were executed while preparing this PR summary.

- [ ] Run `npm run typecheck`.
- [ ] Run `npm test`.
- [ ] Run the relevant Playwright end-to-end suite.
- [ ] Verify GTFS Pathways import, editing, validation, and export to
TDEI.
- [ ] Verify workspace merge target selection, conflict resolution, and
completion.
- [ ] Test workspace creation as POC, data generator, administrator, and
unauthorized users.
- [ ] Verify review fixmes and TDEI feedback resolution.
- [ ] Verify Rapid authentication recovery after an expired or rejected
session.
- [ ] Verify workspace map extent, custom imagery persistence, and
Panoramax imagery.
- [ ] Smoke-test dashboard project-group persistence and workspace
metadata.
- [ ] Verify production map rendering after the MapLibre GL upgrade.
- [ ] Confirm SPA loading, static asset caching, and Sentry production
reporting.

## Rollback

Redeploy the previous production commit, `9612488`, if frontend issues
are found.

Because this release depends on consolidated backend endpoints and
updated editor behavior, coordinate the rollback with any related
backend or Rapid deployments if those services were changed for this
release.