- Make LabelModalMixin interactor getters non-nullable; remove force-unwraps at call sites
- Show positiveLabel and add semanticLabel in progressing button for accessibility
- Use timestamp-based label name in E2E scenario to prevent flakiness on reused accounts
- Guard labelAs action with isLabelAvailable check in SingleEmailController
- Don't pop back on label creation failure so users can retry without losing context
- Block modal dismissal while label creation request is in flight
- Null-guard email.id before toggling label in ThreadView::onCreateANewLabelAction
- Log stackTrace and rethrow in DialogRouter to distinguish errors from user cancel
* Add folder info when open mail list from Label
(cherry picked from commit de0bb4ee02030ca90126766a8713a6826d791acd)
* Add unit test for `hasMailboxLabel` function in BaseEmailItemTile mixin
(cherry picked from commit 18f8d1847acccd6f95006b93903f0caa6c0408df)
* TF-4292 Add E2E test for test case `Add folder info when open mail list from Label` on mobile
(cherry picked from commit 1c209e333510db161522e4449ad7fb2e5d28399f)
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