UnigramDev/Unigram/develop • f994e66 • 2 files, +6/-2
Fix InvalidCastException opening the gift variants popup on Windows 10 (#3346)

ListViewItemPresenter.SelectedBorderBrush, SelectedPointerOverBorderBrush and
SelectedPressedBorderBrush are declared on IListViewItemPresenter4, introduced
in UniversalApiContract 13.0 (build 22621). On older builds the QueryInterface
behind the setter fails and the projection throws, so GiftVariantsPopup crashed
as soon as the first container was realized.

Guard the three assignments on the property actually being present. Where it is
not, the selection border keeps its default brush.

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

UnigramDev/Unigram/develop • 5b2a1e1 • 3 files, +18/-2
Let the invite link actually arrive on ChatInviteLinksPage (#3347)

ChatInviteLinksViewModel declares _supergroupId and _basicGroupId but never
assigns them, so Handle(UpdateSupergroupFullInfo) and
Handle(UpdateBasicGroupFullInfo) compared against 0 and never matched. The
"full info will arrive by push" fallback in OnNavigatedToAsync was therefore
dead, and InviteLink stayed null for every chat whose full info wasn't already
cached — which made the header's copy and share buttons dereference null.

Assign both ids, and fix the basic group branch, which asked for
GetBasicGroupFullInfo(supergroup.Id) inside the branch where TryGetSupergroup
had just failed: supergroup is null there, and it was passing a supergroup id
where a basic group id belongs.

InviteLink is also legitimately null for anyone who isn't the creator, since
TDLib only populates the primary link for them, so the header buttons are now
disabled while it is null instead of acting on nothing.

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

UnigramDev/Unigram/develop • 711f79a • 1 files, +64/-20
Recover from a damaged OCR model archive (#3348)

Extracting Ocr_x64.zip crashed the app with an InvalidDataException,
"The archive entry was compressed using an unsupported compression
method". The message is misleading: Inflater maps zlib's Z_DATA_ERROR
onto that string, and the failure came from mid-entry writes in
DeflateStream.CopyToAsyncStream rather than from ZipArchiveEntry.Open,
so the deflate data was corrupt or truncated, not compressed with a
method the reader doesn't support. Why the local copy was damaged is
not established.

ExtractModelAsync had no try/catch and RecognizeText is async void, so
the failure reached the app unhandled. Catch it, delete the archive so
that the next attempt downloads a fresh copy, delete the partially
written model so that the readiness check in EnsureReadyAsync doesn't
accept it, and report the extraction as unavailable.

Separately, _extractLock.Release() sat outside any finally, so a throw
during extraction leaked the semaphore for the rest of the session:
every later extraction then returned early at Wait(0), leaving OCR
broken until restart.

Reported by crash telemetry on 12.9.1.

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

#unigram