[VibeCoding] Flutter Professional Level-Up: 3-Stage Build Variants (Flavor) and Environment Switching Without Code Modification

"Are you still modifying code every time you change server addresses?" In real-world practice, development (Dev), staging, and production (Prod) environments are strictly separated. However, many developers are exposed to the risk of deployment accidents by manually changing variables in a single main.dart file. This course covers a 'real production-grade architecture' that allows you to instantly switch environments simply by selecting a build target, without modifying a single line of code.