Fix Gradle and Rust cache save failures on parallel release jobs.

Use scope-specific Gradle cache paths, global release concurrency, Rust v3 key with v1/v2 fallbacks, and ensure Android SDK cache dirs exist before save.

Co-authored-by: Cursor <cursoragent@cursor.com>

.github/actions/cache-gradle-build/action.yml

@@ -9,7 +9,7 @@ inputs:
 outputs:
   cache-hit:
     description: Whether an exact cache key match was restored
-    value: ${{ steps.cache.outputs.cache-hit }}
+    value: ${{ steps.cache.outputs.cache-hit == 'true' || steps.cache-android.outputs.cache-hit == 'true' }}
   cache-save-scope:
     description: Scope to pass to the save action (always this job's scope, not a restored fallback key)
     value: ${{ inputs.scope }}
@@ -18,6 +18,23 @@ runs:
   using: composite
   steps:
     - uses: actions/cache/restore@v5
+      if: inputs.scope == 'android'
+      id: cache-android
+      with:
+        path: |
+          .gradle
+          build
+          app/shared/build
+          app/android/build
+          utils/shared/build
+          utils/android/build
+        key: gradle-build-${{ runner.os }}-${{ runner.arch }}-v2-${{ inputs.scope }}-${{ hashFiles('gradle/libs.versions.toml', 'settings.gradle.kts', 'gradle.properties', 'build.gradle.kts', 'app/desktop/build.gradle.kts', 'app/desktop/proguard-rules.pro', 'app/shared/build.gradle.kts', 'app/android/build.gradle.kts', 'utils/shared/build.gradle.kts', 'utils/android/build.gradle.kts') }}
+        restore-keys: |
+          gradle-build-${{ runner.os }}-${{ runner.arch }}-v2-${{ inputs.scope }}-
+          gradle-build-${{ runner.os }}-${{ runner.arch }}-v2-build-jar-
+          gradle-build-${{ runner.os }}-${{ runner.arch }}-v2-
+    - uses: actions/cache/restore@v5
+      if: inputs.scope != 'android'
       id: cache
       with:
         path: |

.github/actions/cache-windows-rust-tools/action.yml

@@ -16,6 +16,9 @@ runs:
           ~/.cargo/registry
           ~/.cargo/git
           app/desktop/windows-setup/target
-        key: windows-rust-${{ runner.os }}-v2-${{ hashFiles('app/desktop/windows-setup/Cargo.lock', 'app/desktop/windows-setup/Cargo.toml', 'app/desktop/windows-setup/**/src/**', 'app/desktop/windows-setup/**/build.rs') }}
+        key: windows-rust-${{ runner.os }}-v3-${{ hashFiles('app/desktop/windows-setup/Cargo.lock') }}
         restore-keys: |
+          windows-rust-${{ runner.os }}-v3-
           windows-rust-${{ runner.os }}-v2-
+          windows-rust-tools-v1-
+          cargo-registry-${{ runner.os }}-

.github/actions/save-gradle-build-cache/action.yml

@@ -9,7 +9,22 @@ inputs:
 runs:
   using: composite
   steps:
-    - uses: actions/cache/save@v5
+    - name: Save Android Gradle build cache
+      if: inputs.scope == 'android'
+      uses: actions/cache/save@v5
+      continue-on-error: true
+      with:
+        key: gradle-build-${{ runner.os }}-${{ runner.arch }}-v2-${{ inputs.scope }}-${{ hashFiles('gradle/libs.versions.toml', 'settings.gradle.kts', 'gradle.properties', 'build.gradle.kts', 'app/desktop/build.gradle.kts', 'app/desktop/proguard-rules.pro', 'app/shared/build.gradle.kts', 'app/android/build.gradle.kts', 'utils/shared/build.gradle.kts', 'utils/android/build.gradle.kts') }}
+        path: |
+          .gradle
+          build
+          app/shared/build
+          app/android/build
+          utils/shared/build
+          utils/android/build
+    - name: Save Gradle build cache
+      if: inputs.scope != 'android'
+      uses: actions/cache/save@v5
       continue-on-error: true
       with:
         key: gradle-build-${{ runner.os }}-${{ runner.arch }}-v2-${{ inputs.scope }}-${{ hashFiles('gradle/libs.versions.toml', 'settings.gradle.kts', 'gradle.properties', 'build.gradle.kts', 'app/desktop/build.gradle.kts', 'app/desktop/proguard-rules.pro', 'app/shared/build.gradle.kts', 'app/android/build.gradle.kts', 'utils/shared/build.gradle.kts', 'utils/android/build.gradle.kts') }}

.github/actions/save-windows-rust-cache/action.yml

@@ -7,7 +7,7 @@ runs:
     - uses: actions/cache/save@v5
       continue-on-error: true
       with:
-        key: windows-rust-${{ runner.os }}-v2-${{ hashFiles('app/desktop/windows-setup/Cargo.lock', 'app/desktop/windows-setup/Cargo.toml', 'app/desktop/windows-setup/**/src/**', 'app/desktop/windows-setup/**/build.rs') }}
+        key: windows-rust-${{ runner.os }}-v3-${{ hashFiles('app/desktop/windows-setup/Cargo.lock') }}
         path: |
           ~/.cargo/registry
           ~/.cargo/git

.github/workflows/release.yml

@@ -28,7 +28,7 @@ on:
         default: "false"
 
 concurrency:
-  group: release-${{ github.ref }}
+  group: release
   cancel-in-progress: true
 
 env:
@@ -414,6 +414,8 @@ jobs:
         id: gradle-build-cache
         with:
           scope: android
+      - name: Prepare Android SDK cache dirs
+        run: mkdir -p ~/.android/build-cache ~/.android/cache
       - name: Cache Android SDK extras
         uses: actions/cache@v5
         with: