fix(autocomplete): strip file extensions from model names in search suggestions

Remove .safetensors/.ckpt/.pt/.bin extensions from model names in autocomplete
suggestions to improve UX and search relevance:

Frontend (web/comfyui/autocomplete.js):
- Add _getDisplayText() helper to strip extensions from model paths
- Update _matchItem() to match against filename without extension
- Update render() and createItemElement() to display clean names

Backend (py/services/base_model_service.py):
- Add _remove_model_extension() helper method
- Update _relative_path_matches_tokens() to ignore extensions in matching
- Update _relative_path_sort_key() to sort based on names without extensions

Tests (tests/services/test_relative_path_search.py):
- Add tests to verify 's' and 'safe' queries don't match all .safetensors files

Fixes issue where typing 's' would match all .safetensors files and cluttered
suggestions with redundant extension names.

py/services/base_model_service.py

@@ -1,5 +1,6 @@
 from abc import ABC, abstractmethod
 import asyncio
+import re
 from typing import Any, Dict, List, Optional, Type, TYPE_CHECKING
 import logging
 import os
@@ -821,35 +822,58 @@ class BaseModelService(ABC):
 
         return include_terms, exclude_terms
 
+    @staticmethod
+    def _remove_model_extension(path: str) -> str:
+        """Remove model file extension (.safetensors, .ckpt, .pt, .bin) for cleaner matching."""
+        return re.sub(r"\.(safetensors|ckpt|pt|bin)$", "", path, flags=re.IGNORECASE)
+
     @staticmethod
     def _relative_path_matches_tokens(
         path_lower: str, include_terms: List[str], exclude_terms: List[str]
     ) -> bool:
-        """Determine whether a relative path string satisfies include/exclude tokens."""
-        if any(term and term in path_lower for term in exclude_terms):
+        """Determine whether a relative path string satisfies include/exclude tokens.
+
+        Matches against the path without extension to avoid matching .safetensors
+        when searching for 's'.
+        """
+        # Use path without extension for matching
+        path_for_matching = BaseModelService._remove_model_extension(path_lower)
+
+        if any(term and term in path_for_matching for term in exclude_terms):
             return False
 
         for term in include_terms:
-            if term and term not in path_lower:
+            if term and term not in path_for_matching:
                 return False
 
         return True
 
     @staticmethod
     def _relative_path_sort_key(relative_path: str, include_terms: List[str]) -> tuple:
-        """Sort paths by how well they satisfy the include tokens."""
-        path_lower = relative_path.lower()
+        """Sort paths by how well they satisfy the include tokens.
+
+        Sorts based on path without extension for consistent ordering.
+        """
+        # Use path without extension for sorting
+        path_for_sorting = BaseModelService._remove_model_extension(
+            relative_path.lower()
+        )
         prefix_hits = sum(
-            1 for term in include_terms if term and path_lower.startswith(term)
+            1 for term in include_terms if term and path_for_sorting.startswith(term)
         )
         match_positions = [
-            path_lower.find(term)
+            path_for_sorting.find(term)
             for term in include_terms
-            if term and term in path_lower
+            if term and term in path_for_sorting
         ]
         first_match_index = min(match_positions) if match_positions else 0
 
-        return (-prefix_hits, first_match_index, len(relative_path), path_lower)
+        return (
+            -prefix_hits,
+            first_match_index,
+            len(path_for_sorting),
+            path_for_sorting,
+        )
 
     async def search_relative_paths(
         self, search_term: str, limit: int = 15, offset: int = 0