Refactor code to make linter runs succeed

This commit refactors the codebase in order to make the shellcheck
workflow pass.

.forgejo/workflows/lint-bash.yml

@@ -31,9 +31,10 @@ jobs:
           find . -name '*.sh' -print0 > shell-scripts.list
 
       - name: Run ShellCheck in Script Directories
+        shell: bash
         run: |
           echo "Running ShellCheck in each script's directory..."
-          while IFS= read -r -d '' script; do
+          while IFS= read -r script; do
             echo "Checking $script"
             script_dir=$(dirname "$script")
             script_name=$(basename "$script")
@@ -41,4 +42,3 @@ jobs:
             (cd "$script_dir" && shellcheck -x "$script_name")
           done < shell-scripts.list
 
-