update actions

Author: haoict

.github/workflows/build.yml

@@ -14,15 +14,45 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@v4
 
+    - name: Cache APT packages
+      uses: actions/cache@v4
+      id: cache-apt
+      with:
+        path: |
+          /var/cache/apt/archives
+          /var/lib/apt/lists
+        key: ${{ runner.os }}-apt-${{ hashFiles('.github/workflows/build.yml') }}
+        restore-keys: |
+          ${{ runner.os }}-apt-
+      
     - name: Install dependencies
+      if: steps.cache-apt.outputs.cache-hit != 'true'
       run: |
         sudo apt-get update
-        sudo apt-get install -y libsdl2-dev libsdl2-ttf-dev
+        sudo apt-get install -y libsdl2-dev libsdl2-ttf-dev xvfb
+        
+    - name: Install from cache
+      if: steps.cache-apt.outputs.cache-hit == 'true'
+      run: |
+        sudo apt-get install -y libsdl2-dev libsdl2-ttf-dev xvfb
         
     - name: Build project
       run: make
 
-    - name: Check binary exists
+    - name: Verify binary
       run: |
+        echo "=== Binary info ==="
         ls -lh simple-terminal
         file simple-terminal
+        echo ""
+        echo "=== Check executable permissions ==="
+        test -x simple-terminal && echo "✓ Binary is executable" || exit 1
+        echo ""
+        echo "=== Check dependencies ==="
+        ldd simple-terminal
+        echo ""
+        echo "=== Test help output ==="
+        ./simple-terminal -h 2>&1 | head -n 5 || echo "Exit code: $?"
+        echo ""
+        echo "=== Test with virtual display ==="
+        timeout 5 xvfb-run -a ./simple-terminal -q || echo "✓ Binary executed (exit code: $?)"