updateEntry's .map() always returned a new array even when no entry matched,
causing unnecessary state changes. During note creation, addEntry uses
startTransition (deferred) while markContentPending calls updateEntry
synchronously — the entry doesn't exist yet, so the no-op .map() produced a
new reference that cascaded into "Maximum update depth exceeded" (which
surfaced as React error #185 in the production WKWebView build).
The fix makes updateEntry bail out (return prev) when no entry was changed,
preventing the spurious state update. Also removes the defensive try-catch
from the previous fix attempt and cleans up an unnecessary setToastMessage
dependency.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
