fix(ci): stabilize Electron smoke flakiness at its sources

The workspace cutter drop check waited a fixed 250ms before asserting
the populated cutter controls, but the drop triggers asynchronous IPC
and media probing, so loaded runners regularly lost that race and
failed with a misleading error. The check now polls the exact same UI
conditions with a bounded deadline before asserting. All window
screenshots in the cutter and workspace smokes carry an explicit
generous timeout because large two-times-DPR captures exceeded the
Playwright default under load. The focused Electron smoke and the
cutter media matrix additionally retry exactly once in both CI
workflows, mirroring the established packaging retries for transient
runner turbulence, and the CI contract now enforces those retries
instead of the former single-line steps.

scripts/smoke-test-ci-contract.js

@@ -591,9 +591,7 @@ for (const relativePath of ['.github/workflows/windows-ci.yml', '.gitea/workflow
     'npm run test:cutter-matrix-contract',
     'npm run test:live-integration-contract',
     'npm run test:unit',
-    'npm run test:e2e:focused',
     'npm run build',
-    'node scripts/smoke-test-cutter-media-matrix.js',
     'npm run test:managed-tools-live',
     'npm run test:packaged-launch',
     'npm run test:installer'
@@ -621,7 +619,7 @@ for (const relativePath of ['.github/workflows/windows-ci.yml', '.gitea/workflow
   const verifyLiveContractIndex = stepIndexByRun(verifyJob, 'npm run test:live-integration-contract');
   check(verifyBuildIndex >= 0 && verifyBuildIndex < verifyLiveContractIndex, `${relativePath} verify must build before the live integration contract`);
   check(verifyBuildIndex < stepIndexByRun(verifyJob, 'npm run test:managed-tools-live'), `${relativePath} runs the live managed-tools check before build`);
-  for (const command of ['npm run pack', 'npm run dist:ci']) {
+  for (const command of ['npm run pack', 'npm run dist:ci', 'npm run test:e2e:focused', 'node scripts/smoke-test-cutter-media-matrix.js']) {
     check(hasSingleConditionalRetry(verifyJob?.steps.map((step) => step.raw).join('\n') || '', command), `${relativePath} does not retry transient ${command} failures exactly once`);
   }
   check(hasSingleConditionalRetry(verifyJob?.steps.map((step) => step.raw).join('\n') || '', 'npx install-electron --no'), `${relativePath} does not retry Electron binary provisioning exactly once`);