UI-focused analysis complementing IMPROVEMENT_PLAN.md: 4 real bugs,
first-render null-guard inconsistency, Home page overload, report /
list-page visual-language split, missing error boundaries, missing
mutation feedback, missing search on grid pages, and a handful of
minor rough edges. Phased into 7 phases (U-1 .. U-12 plus
nice-to-haves) sequenced by value / risk.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
