refactor: Mv4 copilot comments#732

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Kingshuk-Microsoft wants to merge 3 commits intomainfrom

mv4-copilot-comments

Commits on Dec 18, 2025

enhance error logging, escape HTML and remove unused state update test imports
Kingshuk-Microsoft
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Commits on Dec 19, 2025

validate backend URL and auth enabled values in config endpoint
Kingshuk-Microsoft
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validate backend URL and auth_enabled values in config endpoint; remove unused error card import in HomeInput component
Kingshuk-Microsoft
committed