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/scripts/run_hub.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# PM2 / 手动启动入口：加载 manual_trading_hub/.env 后运行 hub.py
+# PM2 / 手动启动入口:加载 manual_trading_hub/.env 后运行 hub.py
 set -e
 set -o pipefail
 
@@ -13,7 +13,7 @@ source "${HUB_DIR}/scripts/lib_load_dotenv.sh"
 
 VENV_PY="${HUB_DIR}/.venv/bin/python"
 if [[ ! -x "${VENV_PY}" ]]; then
-  echo "未找到 ${VENV_PY}，请先: python3 -m venv .venv && pip install -r requirements.txt" >&2
+  echo "未找到 ${VENV_PY},请先: python3 -m venv .venv && pip install -r requirements.txt" >&2
   exit 1
 fi