Handle quoted spaced-letter obfuscation in normalization

app/utils/text_utils.py

@@ -3,6 +3,10 @@ import unicodedata
 
 
 def _merge_spaced_letter_chains(text: str) -> str:
+    def _single_alpha(tok: str) -> str:
+        cleaned = re.sub(r"[^a-zA-ZçğıöşüÇĞİÖŞÜ]", "", tok)
+        return cleaned if len(cleaned) == 1 and cleaned.isalpha() else ""
+
     tokens = text.split()
     if not tokens:
         return text
@@ -13,11 +17,15 @@ def _merge_spaced_letter_chains(text: str) -> str:
 
     while i < n:
         tok = tokens[i]
-        if len(tok) == 1 and tok.isalpha():
-            letters = [tok]
+        single = _single_alpha(tok)
+        if single:
+            letters = [single]
             j = i + 1
-            while j < n and len(tokens[j]) == 1 and tokens[j].isalpha():
-                letters.append(tokens[j])
+            while j < n:
+                next_single = _single_alpha(tokens[j])
+                if not next_single:
+                    break
+                letters.append(next_single)
                 j += 1
 
             # Join only real obfuscation chains like "g e r i z e k a l i".