Split Gradle build cache into restore/save steps so hits still refresh.

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

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

@@ -1,25 +1,20 @@
-name: Cache Gradle build directories
-description: Restore or save module build/ trees for faster CI Gradle jobs
-
-inputs:
-  save:
-    description: Save cache at job end. Use false on parallel jobs that share the same cache key.
-    required: false
-    default: "true"
+name: Restore Gradle build directories
+description: Restore module build/ trees for faster CI Gradle jobs
 
 outputs:
   cache-hit:
-    description: Whether build directories were restored from cache
+    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 }}
 
 runs:
   using: composite
   steps:
-    - uses: actions/cache@v5
+    - uses: actions/cache/restore@v5
       id: cache
       with:
-        lookup-only: ${{ inputs.save != 'true' }}
-        save-always: ${{ inputs.save == 'true' }}
         path: |
           app/desktop/build
           app/shared/build

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

@@ -0,0 +1,20 @@
+name: Save Gradle build directories
+description: Save module build/ trees after a Gradle build (always runs, even on cache hit)
+
+inputs:
+  primary-key:
+    description: cache-primary-key from cache-gradle-build restore step
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - uses: actions/cache/save@v5
+      with:
+        key: ${{ inputs.primary-key }}
+        path: |
+          app/desktop/build
+          app/shared/build
+          app/android/build
+          utils/shared/build
+          utils/android/build

.github/workflows/release.yml

@@ -85,10 +85,13 @@ jobs:
         with:
           version: ${{ needs.resolve-version.outputs.version }}
       - uses: ./.github/actions/cache-gradle-build
-        with:
-          save: "true"
+        id: gradle-build-cache
       - name: Compile and ProGuard release desktop jars
         run: ./gradlew :app:desktop:exportReleaseProguardForCi --no-daemon --console=plain
+      - uses: ./.github/actions/save-gradle-build-cache
+        if: always()
+        with:
+          primary-key: ${{ steps.gradle-build-cache.outputs.cache-primary-key }}
       - uses: actions/upload-artifact@v5
         with:
           name: desktop-proguard
@@ -108,8 +111,7 @@ jobs:
         with:
           version: ${{ needs.resolve-version.outputs.version }}
       - uses: ./.github/actions/cache-gradle-build
-        with:
-          save: "true"
+        id: gradle-build-cache
       - uses: dtolnay/rust-toolchain@stable
         with:
           targets: x86_64-pc-windows-msvc
@@ -134,6 +136,10 @@ jobs:
           path: app/desktop/windows-setup/target/release/*.exe
           if-no-files-found: error
           retention-days: 3
+      - uses: ./.github/actions/save-gradle-build-cache
+        if: always()
+        with:
+          primary-key: ${{ steps.gradle-build-cache.outputs.cache-primary-key }}
 
   windows-package:
     name: Windows (${{ matrix.label }})
@@ -169,8 +175,6 @@ jobs:
         with:
           version: ${{ needs.resolve-version.outputs.version }}
       - uses: ./.github/actions/cache-gradle-build
-        with:
-          save: "false"
       - uses: actions/download-artifact@v5
         with:
           name: desktop-proguard
@@ -229,8 +233,7 @@ jobs:
         with:
           version: ${{ needs.resolve-version.outputs.version }}
       - uses: ./.github/actions/cache-gradle-build
-        with:
-          save: ${{ matrix.arch == 'arm64' }}
+        id: gradle-build-cache
       - uses: actions/download-artifact@v5
         with:
           name: desktop-proguard
@@ -262,6 +265,10 @@ jobs:
           name: macos-${{ matrix.arch }}
           path: app/desktop/build/distributions/release/*-macOS-${{ matrix.arch }}.dmg
           if-no-files-found: error
+      - uses: ./.github/actions/save-gradle-build-cache
+        if: always() && matrix.arch == 'arm64'
+        with:
+          primary-key: ${{ steps.gradle-build-cache.outputs.cache-primary-key }}
 
   linux:
     name: Linux (${{ matrix.label }})
@@ -289,8 +296,7 @@ jobs:
         with:
           version: ${{ needs.resolve-version.outputs.version }}
       - uses: ./.github/actions/cache-gradle-build
-        with:
-          save: ${{ matrix.arch == 'arm64' }}
+        id: gradle-build-cache
       - uses: actions/download-artifact@v5
         with:
           name: desktop-proguard
@@ -320,6 +326,10 @@ jobs:
             app/desktop/build/distributions/release/*-linux-${{ matrix.arch }}.rpm
             app/desktop/build/distributions/release/*-linux-${{ matrix.arch }}.AppImage
           if-no-files-found: error
+      - uses: ./.github/actions/save-gradle-build-cache
+        if: always() && matrix.arch == 'arm64'
+        with:
+          primary-key: ${{ steps.gradle-build-cache.outputs.cache-primary-key }}
 
   android:
     name: Android
@@ -334,8 +344,6 @@ jobs:
         with:
           version: ${{ needs.resolve-version.outputs.version }}
       - uses: ./.github/actions/cache-gradle-build
-        with:
-          save: "false"
       - name: Cache Android SDK extras
         uses: actions/cache@v5
         with: