Include ZIP filename in Studio export success/failure toast

[Copilot]

Canonical issue

Linked by system automation.

Outcome

Studio export now emits one live-region toast with a clear outcome message that always includes the .zip filename on both success and failure paths.

Scope

• Included:
  • Toast message contract: studioExportToastMessage now appends filename for error/empty outcomes, not just success.
  • Studio export wiring: OneLoopStudio.exportPkg derives the export filename once and passes it to all toast branches (empty, success, catch).
  • Regression coverage: export toast test now asserts filename presence in failure text.
  • Example:

    const toast = studioExportToastMessage({
      ok: false,
      error: 'Disk full',
      filename: 'AI Gold Rushes.zip',
    });
    // => "Disk full (AI Gold Rushes.zip)"

• Explicitly excluded:
  • No changes to export package generation/download behavior.
  • No additional toasts, UI flow changes, or accessibility role changes.

Risk

• Risk level: low
• Failure mode: toast text formatting regressions (message composition only).
• Rollback: revert touched files in apps/web/src/components/OneLoopStudio.tsx and apps/web/src/lib/studio-pipeline-status.ts.

Verification

Head SHA: 91083bb

• Focused tests
• Required CI
• Review threads resolved

Production evidence

Not applicable for this PR: change is local UI toast copy/format behavior with no deploy/runtime contract change.

Agent handoff

• One canonical issue is linked
• No competing PR implements the same issue
• Acceptance criteria are satisfied
• Required checks pass on the current head
• Human decision is requested only for product, security, irreversible infrastructure, or production approval

• Fixes Fix Studio export toast success/failure to include ZIP filename #1715

[vercel]

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Project	Deployment	Actions	Updated
v0-uvai	Ready	Preview, v0	Sep 8, 2026 11:08pm UTC

[vercel]

Export toast displays an unsanitized filename (e.g. AI Gold Rushes.zip) that does not match the sanitized ZIP actually downloaded (e.g. ai-gold-rushes.zip).