fix: replace ((var++)) with var=$((var+1)) for compatibility

artifact_comfyui_download.sh

@@ -445,7 +445,7 @@ link_model() {
             # Create symlink
             ln -s "$source_file" "$link_path"
             print_detail "${LINK} Linked: ${DIM}${filename}${RESET}"
-            ((linked_count++))
+            linked_count=$((linked_count+1))
         fi
     done <<< "$model_files"
 
@@ -485,8 +485,10 @@ process_category() {
     local succeeded=0
     local failed=0
 
+    echo "DEBUG: About to enter while loop, models_data first line: $(echo \"$models_data\" | head -n1)" >&2
     while IFS='|' read -r repo_id description size_gb essential model_type filename; do
-        ((current++))
+        echo "DEBUG: Entered while loop iteration" >&2
+        current=$((current+1))
 
         echo ""  >&2
         echo "DEBUG: Processing model $current/$total_models: $repo_id (type: $model_type)" >&2
@@ -513,9 +515,9 @@ process_category() {
         fi
 
         if $success; then
-            ((succeeded++))
+            succeeded=$((succeeded+1))
         else
-            ((failed++))
+            failed=$((failed+1))
         fi
 
         show_progress "$current" "$total_models"
@@ -599,7 +601,7 @@ main() {
         process_category "$category" "$category_display"
 
         # Update counters (this is simplified, you'd need to track actual numbers)
-        ((total_succeeded++))
+        total_succeeded=$((total_succeeded+1))
     done <<< "$categories"
 
     # Display summary