Write, restructure, edit, or strengthen UX/UI portfolio case studies, portfolio pieces, project stories, and interview narratives from supplied product-design evidence. Extract proof, clarify individual and team ownership, connect decisions to outcomes, plan visuals, and handle confidential results. Trigger on "write my UX case study", "improve this portfolio project", "create a portfolio piece", "review my design portfolio", "prepare an interview case study", or "structure this design story". Do not invent research, metrics, quotes, outcomes, or a linear process.