// A COMPREHENSIVE GUIDE TO TEACH MODERN REACT DESIGN PATTERNS FROM BEGINNER TO ARCHITECT LEVEL, COVERING COMPOSITION OVER INHERITANCE, COMPOUND COMPONENTS, CONTROLLED VERSUS UNCONTROLLED INPUTS, HOOKS-BASED LOGIC REUSE, CONTEXT BOUNDARIES, SERVER-STATE VERSUS CLIENT-STATE SEPARATION, EVENT-DRIVEN STATE MACHINES, HEADLESS COMPONENT ARCHITECTURE, ADAPTER AND FACADE LAYERS FOR APIS, PLUGIN-BASED EXTENSIBILITY, DOMAIN-DRIVEN FOLDER STRUCTURES, AND SCALABLE DESIGN-SYSTEM ARCHITECTURE, AND FOR EVERY PATTERN PROVIDE DEEP EXPLANATION OF WHY IT EXISTS, REAL PRODUCTION FAILURE SCENARIOS WHEN MISUSED, AND MULTIPLE SMALL REAL-WORLD PROJECTS SUCH AS BUILDING A HEADLESS UI LIBRARY, A PLUGGABLE DASHBOARD PLATFORM, A COLLABORATIVE EDITOR STATE MACHINE, AND A SCALABLE ENTERPRISE FORM ENGINE TO CLEARLY DEMONSTRATE HOW DESIGN PATTERNS ENABLE MAINTAINABLE, EXTENSIBLE, AND HIGH-QUALITY REACT SYSTEMS AS OF 2026. CHAPTERS