[go_router] Preserve nested pushes during config updates - #12611

…er#193289)

Roll Packages from c2b58e1a97fb to 431ea69a42e2 (56 revisions)

flutter/packages@c2b58e1...431ea69

2026-09-24 10687576+bparrishMines@users.noreply.github.com [cross_file]
Updates cross_file to a package separated federated plugin
(flutter/packages#11010)
2026-09-23 21270878+elliette@users.noreply.github.com [material_ui]
Remove static access of `copyWith` from `dart fix` golden tests for
`ThemeData/TextTheme` (flutter/packages#12994)
2026-09-23 happytoday83@naver.com [camera_avfoundation] Replace
deprecated high-resolution capture APIs (flutter/packages#12372)
2026-09-23 tarrinneal@gmail.com [pigeon] update nullish checks to use
new isNullish method (flutter/packages#12985)
2026-09-23 katelovett@google.com [ci] Assign batch release PR approver
as reviewer on sync-back PR (flutter/packages#12976)
2026-09-23 kf013099@gmail.com [image_picker] Fix scaling 10-bit images
(flutter/packages#12557)
2026-09-23 kevmoo@users.noreply.github.com [material_ui] Improve
Autocomplete, DrawerHeader, and Tooltip accessibility
(flutter/packages#12918)
2026-09-23 katelovett@google.com [google_fonts] Decouple GoogleFontsLite
for full tree-shaking and add full feature parity
(flutter/packages#12830)
2026-09-23 21270878+elliette@users.noreply.github.com [file_selector]
Ignore flakey `file_selector_android` tests (flutter/packages#12992)
2026-09-23 31859944+LongCatIsLooong@users.noreply.github.com [CI] Remove
bringup from `Mac_arm64 build_all_packages` targets
(flutter/packages#12978)
2026-09-22 1961493+harryterkelsen@users.noreply.github.com [material_ui]
Unskip 5 passing web tests in bottom_app_bar_test and text_field_test
(flutter/packages#12983)
2026-09-22 1961493+harryterkelsen@users.noreply.github.com
[cupertino_ui] Unskip 5 passing web tests in
adaptive_text_selection_toolbar_test and text_field_test
(flutter/packages#12984)
2026-09-22 me@davidmiguel.com [go_router] Fix ShellRoute chrome dropped
from semantics tree by ModalBarrier (flutter/packages#12353)
2026-09-22 36861262+QuncCccccc@users.noreply.github.com [material_ui]
Add contrastLevel for M3 ColorScheme (flutter/packages#12743)
2026-09-22 themis.chatzie@gmail.com [go_router] Preserve nested pushes
during config updates (flutter/packages#12611)
2026-09-22 36861262+QuncCccccc@users.noreply.github.com [material_ui]
Migrate M3 Chip template to use new gen_defaults
(flutter/packages#12847)
2026-09-22 50643541+Mairramer@users.noreply.github.com [material_ui] Fix
LocalHistoryEntry leak when double tapping Drawer scrim
(flutter/packages#12552)
2026-09-22 katelovett@google.com Update suggested reviewers
(flutter/packages#12974)
2026-09-22 fluttergithubbot@gmail.com Sync release-material_ui-1.4.0 to
main (flutter/packages#12966)
2026-09-22 fluttergithubbot@gmail.com Sync release-cupertino_ui-1.1.1 to
main (flutter/packages#12965)
2026-09-21 21270878+elliette@users.noreply.github.com [ci] Update repo
for 3.47 stable release (flutter/packages#12959)
2026-09-21 engine-flutter-autoroll@skia.org Manual roll Flutter from
27fec0e to 4fcd90b (1 revision) (flutter/packages#12904)
2026-09-21 katelovett@google.com Revert "[go_router_builder] Migrate to
material_ui" (flutter/packages#12962)
2026-09-21 31859944+LongCatIsLooong@users.noreply.github.com
[material_ui] Update `material_ui` tests to prevent them from failing
when framework `TextStyle` changes (flutter/packages#12728)
2026-09-21 katelovett@google.com [go_router_builder] Migrate to
material_ui (flutter/packages#12913)
2026-09-21 dkwingsmt@users.noreply.github.com [material_ui,
cupertino_ui] Bump Flutter version from to 3.47 (flutter/packages#12944)
2026-09-21 katelovett@google.com [cupertino_ui] Work around dart2wasm
optional parameter inference bug in example checkbox tests
(flutter/packages#12961)
2026-09-21 katelovett@google.com [cupertino_ui] Work around dart2wasm
optional parameter inference bug in checkbox_test.dart
(flutter/packages#12956)
2026-09-21 victor.orozco@cloudsufi.com [google_sign_in] PR 3/4 Migrate
ViewProvider and GID SDK wrappers from Objective-C to Swift
(flutter/packages#12657)
2026-09-21 victor.orozco@cloudsufi.com [google_sign_in] PR 2/4 Migrate
the plugin class from Objective-C to Swift. (flutter/packages#12655)
2026-09-20 10687576+bparrishMines@users.noreply.github.com
[cross_file_darwin] iOS/macOS implementation of `cross_file`
(flutter/packages#12910)
2026-09-20 10687576+bparrishMines@users.noreply.github.com
[cross_file_web] Web implementation of `cross_file`
(flutter/packages#12908)
2026-09-20 36861262+QuncCccccc@users.noreply.github.com [material_ui]
Migrate M3 `InputChip` template to use new gen_defaults
(flutter/packages#12850)
2026-09-20 36861262+QuncCccccc@users.noreply.github.com [material_ui]
Migrate M3 Checkbox defaults to new gen_defaults
(flutter/packages#12816)
2026-09-20 36861262+QuncCccccc@users.noreply.github.com [material_ui]
Migrate M3 `FilterChip` template to use new gen_defaults
(flutter/packages#12849)
2026-09-19 zengyan@88.com [material_ui] Announce PopupMenuButton with a
child as a button (flutter/packages#12585)
2026-09-19 engine-flutter-autoroll@skia.org Roll Flutter (stable) from
9584c67 to 6a19cca (7 revisions) (flutter/packages#12950)
2026-09-18 21270878+elliette@users.noreply.github.com [material_ui]
Reduce the `material_ui` non-wasm web test suite
(flutter/packages#12763)
2026-09-18 31859944+LongCatIsLooong@users.noreply.github.com Replace
`Mac_x64` builders with `Mac_arm64` ones (flutter/packages#12941)
2026-09-18 32538273+ValentinVignal@users.noreply.github.com
[in_app_purchase_storekit] Use `_$SKPaymentDiscountWrapperToJson`
(flutter/packages#12721)
2026-09-18 gerardo.morales@cloudsufi.com [In_app _purchase] README
excerpt examples and changelog (flutter/packages#12739)
2026-09-18 brunocorona.alcantar@gmail.com [material_ui] Add alternative
input method for `RangeSlider` in `NavigationMode.directional`
(flutter/packages#12630)
2026-09-18 10687576+bparrishMines@users.noreply.github.com
[cross_file_android] Android implementation of `cross_file`
(flutter/packages#12909)
2026-09-18 50643541+Mairramer@users.noreply.github.com
[camera_platform_interface] Adds videoOutputPath support to
startVideoRecording (flutter/packages#12667)
2026-09-17 dkwingsmt@users.noreply.github.com [cupertino_ui] Migrate a
snippet in `CupertinoCheckbox`'s API doc to `{@example}` and add unit
tests (flutter/packages#12180)
2026-09-17 36861262+QuncCccccc@users.noreply.github.com [material_ui]
Default gen_defaults color helper prefix (flutter/packages#12848)
...

`RouteConfiguration.reparse` currently restores only imperative matches at the root of the match list. Imperative matches created by pushing a route owned by a `StatefulShellRoute` branch are nested inside `ShellRouteMatch.matches`, so a dynamic `RoutingConfig` update silently drops them.

This change recursively enumerates imperative matches within shell matches and replays them against the new routing configuration. Rebuilding each match preserves the pushed navigation stack without retaining stale route objects from the previous configuration.

The regression test covers this sequence using the go_router test suite's standard A/B route naming:

1. Start at `/a`.
2. Push `/b/details` into another shell branch.
3. Push `/top` above the shell.
4. Update the routing configuration.
5. Pop `/top` and verify that `Screen B Detail` is restored.

Fixes flutter/flutter#167344.

## Pre-Review Checklist

This is a draft pending the author's review of the contribution, AI-assistance, Tree Hygiene, and CLA requirements above.

### Local verification

- `flutter_plugin_tools format --packages go_router`
- `flutter_plugin_tools analyze --packages go_router`
- `flutter_plugin_tools test --packages go_router`
- `flutter_plugin_tools validate --check-for-missing-changes --packages go_router`

[^1]: Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling.