Normalize fullwidth punctuation to ASCII across codebase.

Add scripts/normalize_ambiguous_unicode.py; fix corrupted patch_instance_theme_templates.py. Preserves curly quotes in string literals; removes Git homoglyph warnings on .env.example.

Co-authored-by: Cursor <cursoragent@cursor.com>

manual_trading_hub/hub_ai/rolling_summary.py

@@ -1,4 +1,4 @@
-"""聊天滚动摘要：每轮后压缩历史，续聊只带摘要 + 当前消息。"""
+"""聊天滚动摘要:每轮后压缩历史,续聊只带摘要 + 当前消息."""
 from __future__ import annotations
 
 from hub_ai.text_util import clip_text, is_ai_error_reply
@@ -24,7 +24,7 @@ def refresh_session_rolling_summary(
     assistant_text: str,
     bot_mode: str,
 ) -> str:
-    """合并旧摘要与本轮对话，生成新的短摘要并写入会话。"""
+    """合并旧摘要与本轮对话,生成新的短摘要并写入会话."""
     user_clip = clip_text(user_text, 1200)
     assistant_clip = clip_text(assistant_text, 1800)
     if not user_clip and not assistant_clip:
@@ -63,7 +63,7 @@ def _fallback_summary(prior: str, user_text: str, assistant_text: str) -> str:
     if prior.strip():
         parts.append(prior.strip())
     if user_text.strip():
-        parts.append(f"用户：{clip_text(user_text, 200)}")
+        parts.append(f"用户:{clip_text(user_text, 200)}")
     if assistant_text.strip():
-        parts.append(f"教练：{clip_text(assistant_text, 280)}")
+        parts.append(f"教练:{clip_text(assistant_text, 280)}")
     return clip_text("\n".join(parts), CHAT_ROLLING_SUMMARY_MAX_CHARS)