Fix search engine - add json import

snip/search/engine.py

@@ -1,5 +1,7 @@
 """FTS5 search engine for snippets."""
 
+import json
+import re
 from typing import Any
 
 from snip.db.database import Database, get_database
@@ -24,7 +26,6 @@ class SearchEngine:
 
     def highlight(self, text: str, query: str) -> str:
         """Add highlighting markers around matched terms."""
-        import re
         terms = re.split(r'\s+', query)
         result = text
         for term in terms:
@@ -50,7 +51,6 @@ class SearchEngine:
 
     def parse_query(self, query: str) -> dict[str, Any]:
         """Parse a search query into components."""
-        import re
         result = {
             "terms": [],
             "language": None,