[MaximumTrainer]

Summary

Six Playwright spec files were in the next-branch e2e-shards ignore list
(added by #582) because the Svelte port had regressed from the React
originals. All six are fixed here, and the ignore list shrinks back to
the WebGL-era + engine-only exclusions.

Root causes & fixes

1. No telemetry boot in the Svelte app. main.tsx called
   startTelemetry() before any render and checkBootCrash() right
   after, plus wired the __VIRTUALROW_SIMULATE_BOUNDARY__ test seam.
   The Svelte +layout.svelte skipped all three — so sessionStorage
   never carried a run-start event, and crashBoot never reported a
   prior crash. The layout now runs the same boot sequence in its
   top-level script.

2. .rower3d-canvas-container disappeared under the "needs WebGPU"
   screen. The AC11 "unavailable" branch replaced the entire stage, so
   specs that assert on .rower3d-canvas-container after
   .btn-try-demo (crash-detection, crash-telemetry) raced a 30 s wait
   against a container the engine's decline had already removed. The
   stage is now always mounted when a session is active, and
   <WebGpuUnsupported> sits on top as an overlay — same UX, container
   still queryable.

3. window.__SELECTED_ROUTE declared but never assigned. App.tsx
   published it from a useEffect([selectedRoute]) under
   __PLAYWRIGHT_TESTING; the Svelte RoutesStore now does the same
   from its one #select assignment point, covered by two new tests.

4. VITE_INTERVALS_CLIENT_ID missing from next-branch-ci.yml. The
   main workflow sets VITE_INTERVALS_CLIENT_ID: playwright-e2e-client;
   without it, getClientId() throws and exchangeCode's catch tags
   every failure as the network class — so every auth alert-copy /
   data-auth-error-class test fails identically. The e2e-shards job
   env block now matches the main workflow, and LIBGL_ALWAYS_SOFTWARE=1
   lets the leaflet / MapLibre WebGL layer still render through
   SwiftShader.

Specs re-enabled (17 tests, 6 files)

• auth.spec.ts
• intervals-login-failure.spec.ts
• rownative-track-attach.spec.ts
• crash-detection.spec.ts
• crash-telemetry.spec.ts
• login-integration.spec.ts

Test plan

• Full unit suite green (3634 / 3634 passing locally).
• tsc -p tsconfig.app.json --noEmit clean.
• npm run lint clean.
• Two new tests in routesStore.svelte.test.ts cover the
  __SELECTED_ROUTE publish under / without __PLAYWRIGHT_TESTING.
• e2e-shards 1/2 and (2/2) on this PR run the six re-enabled
  spec files and go green.

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Generated by Claude Code