Timer starts always blocked a second running entry and never read the\nadmin-controlled Settings flag.\n\n- Add TimeTrackingService.can_start_timer() using Settings.get_settings()\n and wire it into start_timer, web timer routes, kiosk start, and\n legacy POST /api/timer/resume.\n- POST /api/v1/timer/start returns 409 with error_code\n timer_already_running when single-active mode is on and a timer\n is already running.\n- Deduplicate start_timer template handling in the service.\n\nTests: tests/test_single_active_timer_setting.py.\nDocs: REST_API (responses), GETTING_STARTED, REQUIREMENTS, Docker env\nnotes, TESTING_STRATEGY, env.example comment; CHANGELOG entry.
- Improve web interface layout for better user-friendliness and mobile responsiveness
* Update CSS variables for consistent spacing and component sizing
* Enhance card layouts with improved padding, borders, and shadows
* Optimize button and form element dimensions for better touch targets
* Add hover effects and animations for improved user interaction
* Implement responsive grid system with mobile-first approach
- Refactor mobile JavaScript to prevent duplicate initialization
* Consolidate mobile enhancements into dedicated utility classes
* Add initialization guards to prevent double loading
* Implement MobileUtils and MobileNavigation classes
* Remove duplicate event listeners and mobile enhancements
- Fix circular import issue in logo handling
* Replace problematic 'from app import app' with Flask's current_app
* Add error handling for cases where current_app is unavailable
* Improve logo path resolution with fallback mechanisms
* Fix settings model to use proper Flask context
- Clean up template code and remove duplication
* Remove duplicate mobile enhancements from base template
* Clean up dashboard template JavaScript
* Centralize all mobile functionality in mobile.js
* Add proper error handling and debugging
- Update CSS variables and spacing system
* Introduce --section-spacing and --card-spacing variables
* Add mobile-specific spacing variables
* Improve border-radius and shadow consistency
* Enhance typography and visual hierarchy
This commit resolves the double loading issue and logo import errors while
significantly improving the overall user experience and mobile responsiveness
of the web interface.