Remove both system-wide and per-user UI feature enable/disable settings
in favor of the centralized ModuleRegistry system for module management.
Changes:
- Remove ui_allow_* columns from Settings model and database (migration 093)
- Remove ui_show_* preference assignments from user settings route
- Remove UI Customization section from user settings template
- Remove UI Features section from admin settings template
- Update admin modules template to use ModuleRegistry instead of settings flags
- Remove settings_flag and user_flag attributes from ModuleDefinition
- Update ModuleRegistry.is_enabled() to only check dependencies and default_enabled
- Update dashboard template to use is_module_enabled() helper
- Update admin route docstring to reflect module management changes
Module visibility is now controlled exclusively via the admin module
management interface (/admin/modules), eliminating the need for separate
system-wide and per-user UI preference systems.
0c310736c1