feat(risk): show live countdown on freeze status badges

Expose freeze_until_ms from risk API and tick hub/instance badges with remaining 1h/4h/daily time.

Co-authored-by: Cursor <cursoragent@cursor.com>

manual_trading_hub/hub.py

@@ -529,6 +529,7 @@ STATIC_DIR = DIR / "static"
 _REPO_STATIC = _REPO_ROOT / "static"
 _AI_REVIEW_RENDER_JS = _REPO_STATIC / "ai_review_render.js"
 _ACCOUNT_RISK_BADGE_CSS = _REPO_STATIC / "account_risk_badge.css"
+_ACCOUNT_RISK_BADGE_JS = _REPO_STATIC / "account_risk_badge.js"
 
 
 @app.get("/assets/account_risk_badge.css")
@@ -542,6 +543,17 @@ def hub_account_risk_badge_css():
     )
 
 
+@app.get("/assets/account_risk_badge.js")
+def hub_account_risk_badge_js():
+    """与四所实例共用仓库根 static/account_risk_badge.js。"""
+    if not _ACCOUNT_RISK_BADGE_JS.is_file():
+        raise HTTPException(status_code=404, detail="account_risk_badge.js not found")
+    return FileResponse(
+        str(_ACCOUNT_RISK_BADGE_JS),
+        media_type="application/javascript; charset=utf-8",
+    )
+
+
 @app.get("/assets/ai_review_render.js")
 def hub_ai_review_render_js():
     """与四所实例共用仓库根 static/ai_review_render.js（须在 /assets mount 之前注册）。"""