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/okx_orders_lib.py

@@ -1,6 +1,6 @@
 """
-OKX 挂单聚合（子代理本地副本，避免依赖仓库根 PYTHONPATH）。
-普通委托 + 算法单 conditional / oco / trigger。
+OKX 挂单聚合(子代理本地副本,避免依赖仓库根 PYTHONPATH).
+普通委托 + 算法单 conditional / oco / trigger.
 """
 from __future__ import annotations
 
@@ -15,7 +15,7 @@ def _order_dedupe_key(order: dict) -> str:
 
 
 def fetch_okx_all_open_orders(ex, exchange_symbol: str) -> list[dict]:
-    """合并 OKX 普通挂单与算法挂单（去重）。"""
+    """合并 OKX 普通挂单与算法挂单(去重)."""
     if not exchange_symbol:
         return []
     ex.load_markets()