update script -> readme

generate_readme.sh

@@ -3,9 +3,10 @@ set -euo pipefail
 
 OUT="README.md"
 
-# Header & TOC
+# Header + hidden anchor + TOC
 cat > "$OUT" <<EOF
 # Wallpapers Collection
+<a name="top"></a>
 
 ## Table of Contents
 EOF
@@ -20,7 +21,7 @@ done
 
 echo -e "\n---\n" >> "$OUT"
 
-# Folders with image entries
+# Sections for each folder and images
 for dir in */; do
   dir_name="${dir%/}"
   anchor=$(printf '%s' "$dir_name" \
@@ -30,11 +31,13 @@ for dir in */; do
   echo "## ${dir_name}" >> "$OUT"
   echo "" >> "$OUT"
 
+  echo "**[⇧ back to top](#top)**" >> "$OUT"
+  echo "" >> "$OUT"
+
   for img in "${dir}"*.{png,jpg,jpeg,gif}; do
     [ -f "$img" ] || continue
     fn="$(basename "${img%.*}")"
     rel="$(echo "$img" | sed 's|^\./||')"
-    # Get filesize in human-readable format
     size=$(du -h "$img" | cut -f1)
 
     echo "### ${fn} — _${size}_ " >> "$OUT"