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/static/dashboard.js

@@ -1,5 +1,5 @@
 /**
- * 中控数据看板：后端 SSE 推送版本号，前端拉快照刷新（无轮询闪烁）。
+ * 中控数据看板:后端 SSE 推送版本号,前端拉快照刷新(无轮询闪烁).
  */
 (function () {
   const page = document.getElementById("page-dashboard");
@@ -362,9 +362,9 @@
         const names = (data.accounts || [])
           .filter((a) => a.loss_alert)
           .map((a) => a.name)
-          .join("、");
+          .join(",");
         elBanner.classList.add("is-on");
-        elBannerText.textContent = `${alertCount} 户单日平仓亏损超过资金合计 ${threshold}%：${names}`;
+        elBannerText.textContent = `${alertCount} 户单日平仓亏损超过资金合计 ${threshold}%:${names}`;
       } else {
         elBanner.classList.remove("is-on");
         elBannerText.textContent = "";
@@ -426,7 +426,7 @@
     });
     dashEventSource.onerror = () => {
       closeDashboardStream();
-      setStatus("SSE 断开，8s 后重连…", true);
+      setStatus("SSE 断开,8s 后重连…", true);
       dashReconnectTimer = setTimeout(() => {
         if (inited) {
           connectDashboardStream();