feat(autocomplete): group relative-path results by folder (#1091)

Autocomplete suggestions were ranked purely by relevance across the whole
library, so same-named loras from different subfolders interleaved and were
hard to tell apart. Results are now bucketed by folder (root first, then
alphabetically, with nested paths sorting naturally) while keeping the
existing relevance ordering within each folder group.

web/comfyui/autocomplete.js

@@ -1398,7 +1398,8 @@ class AutoComplete {
             }
 
             // Merge and deduplicate results while preserving order from backend
-            // Backend returns results sorted by relevance, so we maintain that order
+            // Backend returns results grouped by folder and sorted by relevance
+            // within each group, so we maintain that order
             const seen = new Set();
             const mergedItems = [];