Claude refactored codes to fit SOLID and explained like I'm 10 years old

English version (中文版在下面，Claude 幫我 refactor 成 SOLID 原則並且用十歲孩童方式講解給我聽) The reason this started was because I felt that TrelloBoard.vue was way too long — about 200 lines. (Yes… right now even 200 lines feels too long for me. It’s funny because back the...