---
id: task-5
title: Implement source visibility filtering
status: Done
assignee: []
created_date: '2026-01-02 14:28'
updated_date: '2026-01-02 16:45'
labels: []
dependencies: []
priority: medium
---

## Description

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Wire up the source checkboxes in the sidebar to actually filter displayed events by calendar source
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## Implementation Notes

Refactored source visibility to use "hidden sources" approach:
- Changed `visibleSources` to `hiddenSources` in store (cleaner logic: empty = show all)
- Updated CalendarSidebar to check `!hiddenSources.includes(source.id)`
- Updated MonthView to filter events by hidden sources before display
- Event count header shows "X of Y events" when filtering is active
- State persisted via Zustand persist middleware