fix: break LLM response with fewer types of punctuation

ref: N25B-207

src/control_backend/agents/llm/llm.py

@@ -112,9 +112,7 @@ class LLMAgent(Agent):
 
                     # Stream the message in chunks separated by punctuation.
                     # We include the delimiter in the emitted chunk for natural flow.
-                    pattern = re.compile(
-                        r".*?(?:,|;|:|—|–|-|\.{3}|…|\.|\?|!|\(|\)|\[|\]|/)\s*", re.DOTALL
-                    )
+                    pattern = re.compile(r".*?(?:,|;|:|—|–|\.{3}|…|\.|\?|!)\s*", re.DOTALL)
                     for m in pattern.finditer(current_chunk):
                         chunk = m.group(0)
                         if chunk: