fix(store): escape FTS5 special characters in search_text()

- FTS5 crashes on dots (IP addresses) and hyphens (dates)
- Add regex to strip non-alphanumeric chars before FTS5 MATCH
- Fixes: fts5 syntax error near '.' and no such column: 05

Files changed: src/store.py

src/store.py

@@ -6,6 +6,7 @@ Keine externen Abhängigkeiten außer sqlite3 (stdlib).
 import json
 import sqlite3
 import os
+import re
 from pathlib import Path
 from typing import List, Optional, Dict, Any
 from uuid import UUID
@@ -158,7 +159,12 @@ class EngramStore:
     def search_text(self, query: str, limit: int = 10) -> List[Engram]:
         """Full-Text-Suche über Engramm-Inhalt via SQLite FTS5 (OR-Verknüpfung)."""
         # FTS5-Syntax: Wörter mit OR verbinden für bessere Ergebnisse
-        words = [w.strip() for w in query.replace("'", "''").split() if w.strip()]
+        words = []
+        for word in query.split():
+            # Nur alphanumerische Zeichen als FTS5-Tokens akzeptieren
+            clean_word = re.sub(r'[^a-zA-Z0-9]+', '', word)
+            if clean_word:
+                words.append(clean_word)
         safe_query = " OR ".join(words) if len(words) > 1 else (words[0] if words else "*")
         sql = """
             SELECT e.* FROM engrams e