Add automated PR checks

.github/workflows/build_android.yml

@@ -9,23 +9,22 @@ on:
 permissions:
   contents: write
 
+env:
+  FLUTTER_VERSION: 3.38.9
+
 jobs:
   build-android:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
+        id: flutter-action
         with:
           channel: "stable"
+          flutter-version: ${{ env.FLUTTER_VERSION }}
           cache: true
-
-      - name: Cache Pub dependencies
-        uses: actions/cache@v4
-        with:
-          path: ~/.pub-cache
-          key: ${{ runner.os }}-pub-${{ hashFiles('**/pubspec.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-pub-
+          cache-key: flutter-sdk-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ runner.arch }}
+          pub-cache-key: flutter-pub-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ hashFiles('**/pubspec.lock') }}
 
       - name: Cache Gradle packages
         uses: actions/cache@v4
@@ -41,9 +40,9 @@ jobs:
         uses: actions/cache@v4
         with:
           path: .dart_tool/build
-          key: ${{ runner.os }}-build-runner-${{ hashFiles('lib/**/*.dart', 'pubspec.lock') }}
+          key: ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-${{ hashFiles('lib/**/*.dart', 'test/**/*.dart', 'pubspec.lock') }}
           restore-keys: |
-            ${{ runner.os }}-build-runner-
+            ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-
 
       - name: Decode keystore
         if: env.KEYSTORE_BASE64 != ''

.github/workflows/build_ios.yml

@@ -3,23 +3,30 @@ name: Build iOS
 on:
   workflow_dispatch:
 
+env:
+  FLUTTER_VERSION: 3.38.9
+
 jobs:
   build-ios:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
+        id: flutter-action
         with:
           channel: "stable"
+          flutter-version: ${{ env.FLUTTER_VERSION }}
           cache: true
+          cache-key: flutter-sdk-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ runner.arch }}
+          pub-cache-key: flutter-pub-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ hashFiles('**/pubspec.lock') }}
 
-      - name: Cache Pub dependencies
+      - name: Cache build_runner
         uses: actions/cache@v4
         with:
-          path: ~/.pub-cache
-          key: ${{ runner.os }}-pub-${{ hashFiles('**/pubspec.lock') }}
+          path: .dart_tool/build
+          key: ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-${{ hashFiles('lib/**/*.dart', 'test/**/*.dart', 'pubspec.lock') }}
           restore-keys: |
-            ${{ runner.os }}-pub-
+            ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-
 
       - name: Install dependencies
         run: flutter pub get

.github/workflows/build_linux.yml

@@ -3,6 +3,9 @@ name: Build Linux
 on:
   workflow_dispatch:
 
+env:
+  FLUTTER_VERSION: 3.38.9
+
 jobs:
   build-linux:
     runs-on: ubuntu-latest
@@ -15,17 +18,21 @@ jobs:
           sudo apt-get install -y clang cmake ninja-build pkg-config libgtk-3-dev liblzma-dev
 
       - uses: subosito/flutter-action@v2
+        id: flutter-action
         with:
           channel: "stable"
+          flutter-version: ${{ env.FLUTTER_VERSION }}
           cache: true
+          cache-key: flutter-sdk-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ runner.arch }}
+          pub-cache-key: flutter-pub-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ hashFiles('**/pubspec.lock') }}
 
-      - name: Cache Pub dependencies
+      - name: Cache build_runner
         uses: actions/cache@v4
         with:
-          path: ~/.pub-cache
-          key: ${{ runner.os }}-pub-${{ hashFiles('**/pubspec.lock') }}
+          path: .dart_tool/build
+          key: ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-${{ hashFiles('lib/**/*.dart', 'test/**/*.dart', 'pubspec.lock') }}
           restore-keys: |
-            ${{ runner.os }}-pub-
+            ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-
 
       - name: Install dependencies
         run: flutter pub get

.github/workflows/build_macos.yml

@@ -3,23 +3,30 @@ name: Build macOS
 on:
   workflow_dispatch:
 
+env:
+  FLUTTER_VERSION: 3.38.9
+
 jobs:
   build-macos:
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
+        id: flutter-action
         with:
           channel: "stable"
+          flutter-version: ${{ env.FLUTTER_VERSION }}
           cache: true
+          cache-key: flutter-sdk-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ runner.arch }}
+          pub-cache-key: flutter-pub-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ hashFiles('**/pubspec.lock') }}
 
-      - name: Cache Pub dependencies
+      - name: Cache build_runner
         uses: actions/cache@v4
         with:
-          path: ~/.pub-cache
-          key: ${{ runner.os }}-pub-${{ hashFiles('**/pubspec.lock') }}
+          path: .dart_tool/build
+          key: ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-${{ hashFiles('lib/**/*.dart', 'test/**/*.dart', 'pubspec.lock') }}
           restore-keys: |
-            ${{ runner.os }}-pub-
+            ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-
 
       - name: Install dependencies
         run: flutter pub get

.github/workflows/build_web.yml

@@ -3,23 +3,30 @@ name: Build Web
 on:
   workflow_dispatch:
 
+env:
+  FLUTTER_VERSION: 3.38.9
+
 jobs:
   build-web:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
+        id: flutter-action
         with:
           channel: "stable"
+          flutter-version: ${{ env.FLUTTER_VERSION }}
           cache: true
+          cache-key: flutter-sdk-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ runner.arch }}
+          pub-cache-key: flutter-pub-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ hashFiles('**/pubspec.lock') }}
 
-      - name: Cache Pub dependencies
+      - name: Cache build_runner
         uses: actions/cache@v4
         with:
-          path: ~/.pub-cache
-          key: ${{ runner.os }}-pub-${{ hashFiles('**/pubspec.lock') }}
+          path: .dart_tool/build
+          key: ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-${{ hashFiles('lib/**/*.dart', 'test/**/*.dart', 'pubspec.lock') }}
           restore-keys: |
-            ${{ runner.os }}-pub-
+            ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-
 
       - name: Install dependencies
         run: flutter pub get

.github/workflows/build_windows.yml

@@ -3,23 +3,30 @@ name: Build Windows
 on:
   workflow_dispatch:
 
+env:
+  FLUTTER_VERSION: 3.38.9
+
 jobs:
   build-windows:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
+        id: flutter-action
         with:
           channel: "stable"
+          flutter-version: ${{ env.FLUTTER_VERSION }}
           cache: true
+          cache-key: flutter-sdk-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ runner.arch }}
+          pub-cache-key: flutter-pub-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ hashFiles('**/pubspec.lock') }}
 
-      - name: Cache Pub dependencies
+      - name: Cache build_runner
         uses: actions/cache@v4
         with:
-          path: ~\AppData\Local\Pub\Cache
-          key: ${{ runner.os }}-pub-${{ hashFiles('**/pubspec.lock') }}
+          path: .dart_tool/build
+          key: ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-${{ hashFiles('lib/**/*.dart', 'test/**/*.dart', 'pubspec.lock') }}
           restore-keys: |
-            ${{ runner.os }}-pub-
+            ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-
 
       - name: Install dependencies
         run: flutter pub get

.github/workflows/pr_checks.yml

@@ -0,0 +1,75 @@
+name: PR Checks
+
+on:
+  workflow_dispatch:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+      - ready_for_review
+
+permissions:
+  contents: read
+
+env:
+  FLUTTER_VERSION: 3.38.9
+
+concurrency:
+  group: pr-checks-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  pr-checks:
+    if: github.event_name != 'pull_request' || github.event.pull_request.draft == false
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: subosito/flutter-action@v2
+        id: flutter-action
+        with:
+          channel: "stable"
+          flutter-version: ${{ env.FLUTTER_VERSION }}
+          cache: true
+          cache-key: flutter-sdk-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ runner.arch }}
+          pub-cache-key: flutter-pub-${{ runner.os }}-stable-${{ env.FLUTTER_VERSION }}-${{ hashFiles('**/pubspec.lock') }}
+
+      - name: Cache build_runner
+        uses: actions/cache@v4
+        with:
+          path: .dart_tool/build
+          key: ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-${{ hashFiles('lib/**/*.dart', 'test/**/*.dart', 'pubspec.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-build-runner-${{ env.FLUTTER_VERSION }}-
+
+      - name: Install dependencies
+        run: flutter pub get
+
+      - name: Snapshot workspace status
+        shell: bash
+        run: git status --short --untracked-files=all > /tmp/pre_codegen_status.txt
+
+      - name: Verify generated files
+        run: dart run build_runner build --delete-conflicting-outputs
+
+      - name: Fail if generated files changed
+        shell: bash
+        run: |
+          before_status="$(cat /tmp/pre_codegen_status.txt)"
+          after_status="$(git status --short --untracked-files=all)"
+
+          if [[ "$before_status" != "$after_status" ]]; then
+            echo "Workspace status before code generation:"
+            printf '%s\n' "$before_status"
+            echo "Workspace status after code generation:"
+            printf '%s\n' "$after_status"
+            echo "::error::Generated files are not up to date. Run build_runner and commit the updated files."
+            exit 1
+          fi
+
+      - name: Static analysis
+        run: flutter analyze
+
+      - name: Run tests
+        run: flutter test

lib/features/discover/pages/discover_page.dart

@@ -179,15 +179,18 @@ class _RandomSongsSectionState extends ConsumerState<RandomSongsSection> {
             ? songs.length
             : (songs.length > 6 ? 6 : songs.length);
 
+        // 根据屏幕宽度计算列数：手机2列，平板及以上3列
+        final screenWidth = MediaQuery.of(context).size.width;
+        final crossAxisCount = screenWidth >= 600 ? 3 : 2;
+
         return Column(
           children: [
             GridView.builder(
               shrinkWrap: true,
               physics: const NeverScrollableScrollPhysics(),
-              gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
-                maxCrossAxisExtent: 350,
-                mainAxisExtent:
-                    64, // Fixed height instead of scaling based on width
+              gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
+                crossAxisCount: crossAxisCount,
+                mainAxisExtent: 64,
                 crossAxisSpacing: 12,
                 mainAxisSpacing: 8,
               ),