UnigramDev/Unigram/business-hours-continue • 1cfe003 • 2 files, +98/-9
Implement BusinessHoursViewModel.ContinueImpl

The Done button on Settings > Telegram Business > Opening Hours is bound to
BusinessFeatureViewModelBase.Continue, which calls the abstract ContinueImpl.
BusinessHoursViewModel never implemented it and threw NotImplementedException,
so pressing Done crashed the app every time.

Build a BusinessOpeningHours from the per-day ranges and send it with
SetBusinessOpeningHours, following the other business feature view models:
early-out when nothing changed, toast an error, otherwise go back. Override
HasChanged so the unsaved-changes prompt the base class already carries a
string for actually fires.

The time zone is now resolved on every navigation rather than only when the
user already had opening hours saved, falling back to the first zone at the
current UTC offset, since otherwise a first-time user would have none to send.

Reported by crash telemetry on 12.9.1.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

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