fix(timeline): HI dependency arrows missing on Gantt chart

[steilerDev]

Summary

• Include targetDeliveryDate in the HI positioning fallback chain so household items with scheduler-computed dates appear on the Gantt chart and their dependency arrows render

Fixes #571

Test plan

• Pre-commit hook quality gates pass
• CI checks pass

Co-Authored-By: Claude Opus 4.6 noreply@anthropic.com

[steilerDev]

[security-engineer] PR #572 — GanttChart HI date fallback

Single-line frontend change adding targetDeliveryDate to the date fallback chain for household item Gantt positioning. Reviewed for:

• XSS: no new rendering of user-controlled HTML; the date string feeds SVG coordinate arithmetic only, not innerHTML or dangerouslySetInnerHTML.
• Open redirect: not applicable (no navigation).
• Sensitive data exposure: no new data fetched; all three date fields (actualDeliveryDate, targetDeliveryDate, earliestDeliveryDate) are already present in the existing TimelineResponse payload.
• Input validation: the value is consumed by dateToX() coordinate math — an invalid/missing date triggers the existing if (!dateStr) continue guard.

No security issues identified.

[steilerDev]

[product-architect]

Reviewed and no concerns. The one-line fix correctly adds targetDeliveryDate to the date fallback chain in the hiPoints computation, aligning it with GanttHouseholdItems.tsx (line 84) which already uses actualDeliveryDate ?? targetDeliveryDate. The scheduling engine writes computed dates to targetDeliveryDate, so omitting it caused HI dependency arrows to silently fail to render.

The extra earliestDeliveryDate tail in the fallback chain is a safe broader fallback that won't cause coordinate mismatches — if targetDeliveryDate is present, both the bar renderer and the arrow endpoint agree.

No schema, API contract, or architectural concerns. Would approve if this were not my own PR.

[github-actions]

🎉 This PR is included in version 1.13.0-beta.23 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀

[github-actions]

🎉 This PR is included in version 1.13.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀