Fix syntax-check: remove commit count gate, use pacman for Arch

.gitea/workflows/syntax-check.yaml

@@ -1,4 +1,4 @@
-name: Syntax Check (Every 2 Commits)
+name: Syntax Check
 
 on:
   push:
@@ -8,16 +8,13 @@ on:
 jobs:
   syntax-check:
     runs-on: archlinux
-    if: ${{ github.event.commits && github.event.commits.length >= 2 }}
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
 
       - name: Install linting tools
         run: |
-          sudo apt-get update
+          pacman -Syu --noconfirm --needed shellcheck python-yamllint
-          sudo apt-get install -y shellcheck
-          pip install --break-system-packages yamllint
 
       - name: Lint shell scripts with ShellCheck
         run: |
@@ -111,7 +108,7 @@ jobs:
             # Skip empty lines and comments
             [[ -z "$line" || "$line" =~ ^# ]] && continue
 
-            # Check for invalid characters (package names should be alphanumeric, hyphens, dots, underscores, @)
+            # Check for invalid characters
             if [[ ! "$line" =~ ^[a-zA-Z0-9._@+\-]+$ ]]; then
               echo "❌ Line $LINENUM: invalid package name format: '$line'"
               FAILED=1