feat: improve build profile DevEx — a la carte collection picker, copy buttons, contributing guide link#7588

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yi-nuo426 wants to merge 2 commits intomasterfrom

work/gracious-yalow

Commits on Apr 4, 2026

feat: improve build profile DevEx with a la carte collection picker
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Commits on Apr 6, 2026

fix: address Copilot review feedback on lite-placeholder
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