Implement task filtering functionality (Linear-inspired)

[luizhcastro]

Description

Implement a comprehensive task filtering system inspired by Linear's filtering capabilities. This should allow users to filter tasks by multiple criteria simultaneously with an intuitive UI/UX.

Motivation

• Enable users to quickly find specific tasks in large projects
• Improve productivity by reducing time spent searching
• Support complex workflows with multiple filtering criteria
• Provide a modern, intuitive filtering experience similar to industry-leading tools
• Allow users to save and reuse common filter combinations

Scope

Filter Criteria

• Status (open, in progress, closed, etc.)
• Assignee (including "unassigned" option)
• Labels (single or multiple)
• Priority
• Due date (overdue, today, this week, custom range)
• Created date
• Updated date
• Creator/Author
• Project/Board
• Text search (title, description)

UI/UX Requirements

• Filter bar/panel with clear visual hierarchy
• Multiple filter criteria can be applied simultaneously
• AND/OR logic support for complex queries
• Active filters clearly displayed with ability to remove individual filters
• Filter results update in real-time or with minimal delay
• Keyboard shortcuts for quick filter access
• Mobile-responsive filter interface
• "Clear all filters" quick action

Advanced Features

• Save filter combinations as "Views"
• Share filter URLs with team members
• Filter history/recently used filters
• Quick filters (predefined common filters)
• Filter suggestions based on usage patterns
• Export filtered results

Backend Requirements

• Optimized database queries for filtering
• API endpoints supporting multiple filter parameters
• Query parameter structure for filter criteria
• Pagination support for filtered results
• Proper indexing for common filter fields
• Cache strategies for frequently used filters

Acceptance Criteria

• Users can apply multiple filters simultaneously
• Filter interface is intuitive and responsive
• Filtered results are accurate and performant (< 500ms response time)
• Active filters are clearly visible
• Individual filters can be removed without clearing all
• Filter state persists across page refreshes (if desired)
• Filter URLs can be bookmarked and shared
• Works smoothly on desktop and mobile devices

Reference

Linear's filtering system is an excellent reference:

• Clean, minimal UI
• Powerful multi-criteria filtering
• Keyboard-first approach
• Saved views functionality

Technical Considerations

• Consider using query string parameters for shareable filter URLs
• Implement debouncing for real-time text search
• Consider using a filter builder library or component
• Plan for filter performance with large datasets
• Consider filter analytics to understand usage patterns