Fix 3 crashes#760

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RankoR wants to merge 3 commits intoreadium:developfrom

RankoR:crash-fixes

Commits on Mar 1, 2026

Fix production crash in WebView width & height checks
RankoR
committed
Early-return instead of unwrapping nullable value to fix crashes
RankoR
committed
Prevent race condition when container reads continue while zip file is already closed
RankoR
committed