Refactor: simplify string handling, fix binary encoding, improve type consistency#16

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Copilot wants to merge 3 commits intomainfrom

copilot/update-string-replacement-method

Commits on Nov 29, 2025

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Copilot
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Apply code quality fixes: simplify string replacement, add phone validation, improve type consistency

Copilot
and
morningstarxcdcode
committed
Fix firebaseClient.ts: add initialization flag to track state correctly

Copilot
and
morningstarxcdcode
committed