Refactored the userscript into a cleaner modular architecture by reorganizing major sections, consolidating shared constants and symbols, separating site configuration, styles, utilities, appearance settings, and platform-specific logic, moving Supermini positioning into the layout module, centralizing bookmark/navigation content, and splitting appearance settings into shared theme, shared font, shared utilities, and Claude-specific integration while renaming shared font helpers to remove obsolete Claude-specific prefixes.