Update CI workflow configuration

- Update GitHub Actions CI workflow
- Include Gradle build cache files
- Ensure CI compatibility with current Flutter/Dart versions

Author: aimuhire

.github/workflows/ci.yml

@@ -13,17 +13,22 @@ concurrency:
 jobs:
   test-server:
     runs-on: ubuntu-latest
-
     steps:
       - uses: actions/checkout@v4
 
-      - name: Setup Node.js
+      - name: Setup Node.js (match local 24.3.0)
         uses: actions/setup-node@v4
         with:
-          node-version: "18"
+          node-version: "24.3.0"
           cache: "npm"
           cache-dependency-path: server/package-lock.json
 
+      - name: Use matching npm (11.4.2) + show versions
+        run: |
+          npm i -g npm@11.4.2
+          node -v
+          npm -v
+
       - name: Install dependencies
         working-directory: server
         run: npm ci
@@ -42,27 +47,24 @@ jobs:
 
   test-mobile:
     runs-on: ubuntu-latest
-
     steps:
       - uses: actions/checkout@v4
 
-      # Match local Flutter exactly: 3.35.3 (stable)
+      # Flutter pinned to your local: 3.35.3 (stable)
       - name: Setup Flutter
         uses: subosito/flutter-action@v2
         with:
           flutter-version: "3.35.3"
           channel: "stable"
           cache: true
 
-      # JDK 17 is the current default for modern Android/Gradle
       - name: Setup Java 17
         uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: "17"
           cache: gradle
 
-      # Android SDK & licenses for building APKs
       - name: Setup Android SDK
         uses: android-actions/setup-android@v3
 
@@ -88,17 +90,22 @@ jobs:
   test-integration:
     runs-on: ubuntu-latest
     needs: [test-server, test-mobile]
-
     steps:
       - uses: actions/checkout@v4
 
-      - name: Setup Node.js
+      - name: Setup Node.js (match local 24.3.0)
         uses: actions/setup-node@v4
         with:
-          node-version: "18"
+          node-version: "24.3.0"
           cache: "npm"
           cache-dependency-path: server/package-lock.json
 
+      - name: Use matching npm (11.4.2) + show versions
+        run: |
+          npm i -g npm@11.4.2
+          node -v
+          npm -v
+
       - name: Install server dependencies
         working-directory: server
         run: npm ci