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/fix_env_crlf.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# 去掉各目录 .env 的 Windows 换行符（解决 PM2 agent errored: $'\r': command not found）
+# 去掉各目录 .env 的 Windows 换行符(解决 PM2 agent errored: $'\r': command not found)
 set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
@@ -16,7 +16,7 @@ fixed=0
 for d in "${dirs[@]}"; do
   f="${d}/.env"
   if [[ ! -f "${f}" ]]; then
-    echo "跳过（无文件）: ${f}"
+    echo "跳过(无文件): ${f}"
     continue
   fi
   if grep -q $'\r' "${f}" 2>/dev/null; then
@@ -28,6 +28,6 @@ for d in "${dirs[@]}"; do
   fi
 done
 
-echo "完成，共修复 ${fixed} 个 .env。"
+echo "完成,共修复 ${fixed} 个 .env."
 echo "请重启子代理: cd ${REPO}/manual_trading_hub && pm2 restart manual-agent-gate manual-agent-binance manual-agent-okx"
 echo "或: bash scripts/pm2_hub.sh restart"