- Remove "来源/分类" (category.php) link from main navigation
- Relocate "cppreference" to end of menu, after contest-related items
- Add conditional "AI 聊天" section using `$OJ_AI_HTML` variable
- Update LLM model from `MiniMax-M2.7` to `MiniMax-M3` in db_info.inc.php
- Fix trailing whitespace in header.php template
- Restore nickname field in modify.php SQL update query
- Remove disabled attribute from nickname input in modifypage.php template
- Allow users to update their nickname through profile modification
- Maintain existing HTML entity encoding for security
Add a copy button to markdown code blocks in the problem view for easier code snippet copying. The button appears in the top-right corner of code blocks and provides visual feedback on copy success or failure. This improves user experience by eliminating the need to manually select and copy code.
- Increase min-height and line-height to 32px for consistent sizing
- Remove top and bottom padding to improve vertical centering
- Maintain existing width and margin properties
- Replace custom semantic-ui dropdown component with standard HTML select element
- Simplify JavaScript by using native event listener instead of semantic-ui dropdown API
- Remove unnecessary dropdown initialization and selection setting code
- Maintain same functionality while reducing complexity and dependency on semantic-ui
- Add new `gitpull.php` page for manual git pull execution by administrators
- Remove automatic git pull on homepage visit to prevent unintended updates
- Include git pull link in admin navigation menu for easy access
- Secure interface with admin-only access and sudo credentials configuration
- Relocate hardness dropdown from left to right side of filter controls
- Change form submission behavior to update URL parameters directly
- Preserve selected hardness value on page reload
- Remove page parameter when hardness changes to reset pagination
- Improve visual alignment and spacing in filter interface
- Added hardness filter dropdown in problemset UI with options 1-8
- Implemented server-side hardness parameter validation and filtering
- Refactored query parameter handling to use $filter_params array
- Updated SQL queries to use parameter binding for both search and hardness filters
- Fixed pagination to include hardness parameter in URL
- Improved code organization by centralizing filter parameter management
