Fix build script and package build issues in Forgejo workflows

- Add fallback manual build process when build script is missing
- Improve error handling for package build steps
- Add file existence checks and directory validation
- Create minimal debian structure for testing when needed
- Better error messages and status reporting for CI debugging

.forgejo/workflows/ci.yml

@@ -432,7 +432,67 @@ jobs:
 
     - name: Build Debian package
       run: |
-        ./build-debian-trixie.sh
+        # Check if build script exists and make it executable
+        if [ -f "./build-debian-trixie.sh" ]; then
+          echo "✅ Build script found, making it executable..."
+          chmod +x ./build-debian-trixie.sh
+          
+          # Build the package
+          ./build-debian-trixie.sh
+          echo "✅ Package build successful"
+        else
+          echo "⚠️  Build script not found, attempting manual build..."
+          
+          # Try manual build process
+          echo "Installing build dependencies..."
+          apt-get update
+          apt-get install -y \
+            build-essential \
+            devscripts \
+            debhelper \
+            dh-cargo \
+            cargo \
+            rustc \
+            pkg-config \
+            libssl-dev \
+            libdbus-1-dev \
+            libglib2.0-dev \
+            libapt-pkg-dev \
+            libzstd-dev \
+            libcurl4-gnutls-dev \
+            libsystemd-dev \
+            libmount-dev \
+            libselinux1-dev \
+            libsepol-dev \
+            libarchive-dev \
+            libgpgme-dev \
+            libavahi-client-dev \
+            libavahi-common-dev \
+            libffi-dev \
+            libpcre2-dev \
+            libxml2-dev \
+            zlib1g-dev \
+            liblz4-dev \
+            liblzma-dev \
+            nettle-dev \
+            libgmp-dev \
+            libicu-dev \
+            libpython3-dev \
+            python3-dev \
+            python3-setuptools \
+            python3-wheel \
+            python3-pip
+          
+          echo "Building package manually..."
+          dpkg-buildpackage -us -uc -b
+          
+          if [ $? -eq 0 ]; then
+            echo "✅ Manual package build successful"
+          else
+            echo "❌ Manual package build failed"
+            exit 1
+          fi
+        fi
 
     - name: Create package summary
       run: |