[Schedule] Allow to hide specific events

[dantetemplar]

Describe the feature

Users should be able to hide specific events from the calendar based on their categories within an event group. The feature should allow fine-grained control over visibility settings for events, improving the user experience when managing large event sets.

Suggested solution

1. Event Group Category Filtering

   • When a user clicks on Sources in the calendar view, a list of event groups should be displayed.
   • Each event group will have a settings icon ⚙️. Clicking it will open a popup.
   • The popup will display a list of all unique CATEGORIES (sorted alphabetically) for that event group.
   • Each category will have a hide/unhide (eye icon) button to toggle its visibility.
   • A search bar should be included to filter categories in the list.
   • At the top of the list, an Invert All toggle button should be available.
     • When enabled, it should swap all hidden categories to visible and vice versa.
     • This inversion should be stored as a separate variable.
     • The toggle button can be represented by an exclamation mark icon (!), with an active state changing its background color.
   • When rendering the calendar, hidden CATEGORIES should be retrieved from settings and events matching those categories should be excluded.

   Example Data Structure:

   {
     "categories_settings": [
       {
         "event_group_id": 123,
         "inverted": false,
         "categories": ["DevOps Engineering"]
       }
     ]
   }

2. User Modifications Overview

   • Clicking Sources should also display a summary of user modifications:
     • Hidden categories per event group should be listed like this:

       B22-CBS-02 hide:
       - DevOps Engineering
       - ...
       

     • Inverted event groups should be displayed as:

       B22-CBS-02 show only:
       - Software Quality
       - ...
       

     • Each modification should have a remove (❌) button to revert the change.

3. Quick Hide via Event Details

   • When clicking on an individual event in the calendar, a popup should show its CATEGORIES.
   • Each category should have a hide button, allowing users to instantly hide that category.
   • This should hide all events with that category across the event group.

4. Skipping Events with Hidden Categories

   • When fetching and displaying events, the system should check for hidden categories set by the user.
   • If an event has one or more matching hidden categories, it should be excluded from the calendar view.
   • If an event group is inverted, only explicitly allowed categories should be shown, skipping all others.

Additional context

No response