[splincode]

Summary

• expand all 21 full answers in Когнитивные искажения в UI/UX
• explain confirmation bias, anchoring, status quo, loss aversion, framing, sunk costs and survivorship bias
• include realistic frontend and product examples, mitigation strategies, limitations and interview guidance
• clarify how team decisions, feedback, user segments and research can be affected by cognitive biases
• preserve all short answers and avoid changes outside this subsection

Scope

• continues Расширить полные ответы во всех разделах #49 after merged docs: expand UI/UX metrics and validation answers #196
• changes only src/pages/ui-ux/index.md
• completes Когнитивные искажения в UI/UX
• Этичный UX и dark patterns and later subsections remain out of scope

Verification

• Expanded all 21 full answers, kept short answers unchanged and only changed the target subsection
• npm run format:check (CI)
• npm run build (CI)

Part of #49.