Implement difficulty levels for activities with filtering functionality #13
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This PR adds support for difficulty levels to activities, allowing students to filter activities by skill level: Iniciante (Beginner), Intermediário (Intermediate), and Avançado (Advanced).
Key Changes
Domain Layer
DifficultyLevel
enum with three levels: BEGINNER, INTERMEDIATE, ADVANCEDActivity
entity to include an optionaldifficultyLevel
fieldApplication Layer
DifficultyLevelDTO
for data transferActivityDTO
to include difficulty level informationActivityMapper
to handle difficulty level conversionsInfrastructure Layer
Frontend Implementation
Added a new "Filtrar por dificuldade" section to the sidebar with 5 filter options:
Technical Implementation
The implementation follows Clean Architecture principles:
Screenshots
Default view with new difficulty filter:

Filtering by "Avançado" (Advanced) level:

As requested in the requirements:
Fixes #6.
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