[material_ui] Batch release (#12773)

This PR was created automatically to batch release the `material_ui`.

packages/material_ui/CHANGELOG.md

diff --git a/packages/material_ui/CHANGELOG.md b/packages/material_ui/CHANGELOG.md
index 1f05474..84b5327 100644
--- a/packages/material_ui/CHANGELOG.md
+++ b/packages/material_ui/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 1.2.0
+
+- Adds the `StyleVariant` enum defining the Material 3 and Material 3 Expressive style variants.
+- Fix RangeSlider thumb overlay remaining visible after touch interaction
+- Constrains Slider and RangeSlider value indicator labels to the screen width, truncating with an ellipsis instead of clipping.
+- Prevents stale asynchronous suggestions from replacing newer `SearchAnchor` results.
+
 ## 1.1.0
 
 - Add missing Widget of the Week videos to widget API docs.

packages/material_ui/pending_changelogs/change_2026_08_16_search_anchor.yaml

diff --git a/packages/material_ui/pending_changelogs/change_2026_08_16_search_anchor.yaml b/packages/material_ui/pending_changelogs/change_2026_08_16_search_anchor.yaml
deleted file mode 100644
index cec507d..0000000
--- a/packages/material_ui/pending_changelogs/change_2026_08_16_search_anchor.yaml
+++ /dev/null
@@ -1,3 +0,0 @@
-changelog: |
-  - Prevents stale asynchronous suggestions from replacing newer `SearchAnchor` results.
-version: patch

packages/material_ui/pending_changelogs/change_2026_08_23_1787504018597.yaml

diff --git a/packages/material_ui/pending_changelogs/change_2026_08_23_1787504018597.yaml b/packages/material_ui/pending_changelogs/change_2026_08_23_1787504018597.yaml
deleted file mode 100644
index 89b5667..0000000
--- a/packages/material_ui/pending_changelogs/change_2026_08_23_1787504018597.yaml
+++ /dev/null
@@ -1,3 +0,0 @@
-changelog: |
-  - Fix RangeSlider thumb overlay remaining visible after touch interaction
-version: patch

packages/material_ui/pending_changelogs/change_2026_08_24_1787581429556.yaml

diff --git a/packages/material_ui/pending_changelogs/change_2026_08_24_1787581429556.yaml b/packages/material_ui/pending_changelogs/change_2026_08_24_1787581429556.yaml
deleted file mode 100644
index 5aa1cfa..0000000
--- a/packages/material_ui/pending_changelogs/change_2026_08_24_1787581429556.yaml
+++ /dev/null
@@ -1,3 +0,0 @@
-changelog: |
-  - Constrains Slider and RangeSlider value indicator labels to the screen width, truncating with an ellipsis instead of clipping.
-version: patch

packages/material_ui/pending_changelogs/change_2026_09_01_1788300011018.yaml

diff --git a/packages/material_ui/pending_changelogs/change_2026_09_01_1788300011018.yaml b/packages/material_ui/pending_changelogs/change_2026_09_01_1788300011018.yaml
deleted file mode 100644
index 2ebcd33..0000000
--- a/packages/material_ui/pending_changelogs/change_2026_09_01_1788300011018.yaml
+++ /dev/null
@@ -1,3 +0,0 @@
-changelog: |
-  - Adds the `StyleVariant` enum defining the Material 3 and Material 3 Expressive style variants.
-version: minor

packages/material_ui/pubspec.yaml

diff --git a/packages/material_ui/pubspec.yaml b/packages/material_ui/pubspec.yaml
index 6ee348a..858529f 100644
--- a/packages/material_ui/pubspec.yaml
+++ b/packages/material_ui/pubspec.yaml
@@ -1,6 +1,6 @@
 name: material_ui
 description: The official Flutter Material UI Library, implementing Google's Material Design design system.
-version: 1.1.0
+version: 1.2.0
 repository: https://github.com/flutter/packages/tree/main/packages/material_ui
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A%20material%20design%22