Covers weak/mixed/strong declension for accusative adjectives. Learning
record captures the two real misconceptions found: reaching for -es after
a der-word (only valid in mixed/strong declension), and E-Mail's gender
missed a second time despite an earlier correction.
Logs the perfect score on lesson 4 and sets priorities for what's next —
Perfekt/separable verb formation, accusative adjective endings, and the
still-untouched noun gender gap from lesson 2.
