Kanban board loses filter and modal state on database updates

[JanJetze]

Problem

When the database is updated (e.g., task status change, new task created), the kanban board at localhost:3333/kanban.html fully refreshes. This causes:

1. Filters reset - Any active filter selections are lost
2. Open task modals close - If viewing task details, the modal closes

This creates a disruptive experience when working with tasks, as every database operation interrupts the current workflow.

Expected Behavior

• Filters should persist across data refreshes
• Open task modals should remain open (with updated data if the viewed task changed)
• The board should update data without losing UI state

Suggested Solutions

1. Preserve state in URL params - Store filter state in URL query parameters so it survives refreshes
2. Use incremental updates - Instead of full page refresh, use WebSocket/SSE to push incremental changes
3. Store state in localStorage - Persist filter selections locally and restore after refresh
4. Debounce/batch updates - Avoid rapid successive refreshes when multiple changes occur

Reproduction

1. Open kanban board at http://localhost:3333/kanban.html
2. Apply a filter (e.g., filter by status or priority)
3. Click on a task to open its details modal
4. From another terminal/Claude session, update a task status
5. Observe: filters reset, modal closes

🤖 Generated with Claude Code