Support plugin-provided awards and user-configurable visibility. Controller now loads plugin entries and user options, exposes plugin_award_entries and plugin_award_visibility to views, and adds savePluginAward() to validate input and persist visibility via user_options_model. Views: settings page renders plugin award rows with checkboxes; header only shows plugin awards that are enabled. JS: award_settings.js and awards.js handle plugin award checkbox events, call the new savePluginAward endpoint, and provide saving/feedback UI. Includes input sanitization, slug validation, and preserves existing core award flows.
