Fix Gradle cache save races when restore hits a fallback key.

Save always uses the job scope key; do not reuse cache-primary-key from a partial restore (e.g. Android saving build-jar).

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

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

@@ -10,9 +10,9 @@ outputs:
   cache-hit:
     description: Whether an exact cache key match was restored
     value: ${{ steps.cache.outputs.cache-hit }}
-  cache-primary-key:
-    description: Primary cache key to pass to the save action after the build
-    value: ${{ steps.cache.outputs.cache-primary-key }}
+  cache-save-scope:
+    description: Scope to pass to the save action (always this job's scope, not a restored fallback key)
+    value: ${{ inputs.scope }}
 
 runs:
   using: composite

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

@@ -2,8 +2,8 @@ name: Save Gradle build directories
 description: Save project .gradle/, build/ trees after a Gradle build
 
 inputs:
-  primary-key:
-    description: cache-primary-key from cache-gradle-build restore step
+  scope:
+    description: Same scope passed to cache-gradle-build (save always uses this job's key, not a restored fallback key)
     required: true
 
 runs:
@@ -12,7 +12,7 @@ runs:
     - uses: actions/cache/save@v5
       continue-on-error: true
       with:
-        key: ${{ inputs.primary-key }}
+        key: gradle-build-${{ 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

.github/workflows/release.yml

@@ -119,7 +119,7 @@ jobs:
       - uses: ./.github/actions/save-gradle-build-cache
         if: always()
         with:
-          primary-key: ${{ steps.gradle-build-cache.outputs.cache-primary-key }}
+          scope: ${{ steps.gradle-build-cache.outputs.cache-save-scope }}
       - uses: actions/upload-artifact@v5
         with:
           name: desktop-proguard
@@ -170,7 +170,7 @@ jobs:
       - uses: ./.github/actions/save-gradle-build-cache
         if: always()
         with:
-          primary-key: ${{ steps.gradle-build-cache.outputs.cache-primary-key }}
+          scope: ${{ steps.gradle-build-cache.outputs.cache-save-scope }}
 
   windows-package:
     name: Windows (${{ matrix.label }})
@@ -246,7 +246,7 @@ jobs:
       - uses: ./.github/actions/save-gradle-build-cache
         if: always()
         with:
-          primary-key: ${{ steps.gradle-build-cache.outputs.cache-primary-key }}
+          scope: ${{ steps.gradle-build-cache.outputs.cache-save-scope }}
 
   macos:
     name: macOS (${{ matrix.label }})
@@ -316,7 +316,7 @@ jobs:
       - uses: ./.github/actions/save-gradle-build-cache
         if: always()
         with:
-          primary-key: ${{ steps.gradle-build-cache.outputs.cache-primary-key }}
+          scope: ${{ steps.gradle-build-cache.outputs.cache-save-scope }}
 
   linux:
     name: Linux (${{ matrix.label }})
@@ -382,7 +382,7 @@ jobs:
       - uses: ./.github/actions/save-gradle-build-cache
         if: always()
         with:
-          primary-key: ${{ steps.gradle-build-cache.outputs.cache-primary-key }}
+          scope: ${{ steps.gradle-build-cache.outputs.cache-save-scope }}
 
   android:
     name: Android
@@ -441,7 +441,7 @@ jobs:
       - uses: ./.github/actions/save-gradle-build-cache
         if: always()
         with:
-          primary-key: ${{ steps.gradle-build-cache.outputs.cache-primary-key }}
+          scope: ${{ steps.gradle-build-cache.outputs.cache-save-scope }}
       - name: Stage APK
         run: |
           mkdir -p release-staging