Gmail Labels Creator

Google Apps Script that automatically organizes inbox by creating labels based on sender domain. Smart subdomain management (42 predefined prefixes ignored), grouping of generic domains (gmail.com, yahoo.com) under single label. Daily scheduled processing at configurable time, only processes read emails. Gmail-integrated control panel with Material Design, visual statistics with charts, CSV export. Modular architecture with singleton patterns, label cache, structured logging (DEBUG/INFO/WARN/ERROR/CRITICAL).