Three site-list UX improvements: instant completion feedback, error highlighting, and auto-deselect

Short summary

A detailed walkthrough of three UX improvements to a site-list visualization for bulk maintenance runs: instant per-site completion feedback via targeted cache busting, persistent error highlighting with red borders for 24 hours using conservative marker-based detection to avoid false positives, and automatic checkbox deselection after a run completes. The post explains design trade-offs favoring cautious error detection over aggressive flagging.

• •Instant completion feedback refreshes individual site thumbnails without interrupting running sites
• •Error highlighting uses a single conclusive log marker to avoid false positives, persisting for 24 hours with red border styling
• •Auto-deselect unconditionally clears checkboxes after a run since border colors retain visual history

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