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/pm2_restart_agents.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# 仅重启失败的子代理（保留 hub / 已 online 的 agent）
+# 仅重启失败的子代理(保留 hub / 已 online 的 agent)
 set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
@@ -20,4 +20,4 @@ pm2 start "${ECO}" --only manual-agent-okx
 pm2 start "${ECO}" --only manual-agent-gate
 
 pm2 save 2>/dev/null || true
-echo "已重建 binance / okx / gate 子代理，请执行: bash scripts/check_agents.sh"
+echo "已重建 binance / okx / gate 子代理,请执行: bash scripts/check_agents.sh"