feat(hub): enrich AI coach with fund history, closed trades, and chat uploads

- Add 15-day fund snapshot store and /api/hub/account on all instances

- Summary includes yesterday/today trades, fund columns, and section 5 操作建议

- Chat context distinguishes empty positions from local monitors

- Support image/document attachments in AI chat

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

hub_bridge.py

@@ -205,6 +205,7 @@ def install_on_app(
     meta_fn,
     views: dict,
     ohlcv_fn=None,
+    account_fn=None,
 ):
     app.config["HUB_CTX"] = {
         "exchange": exchange,
@@ -213,6 +214,7 @@ def install_on_app(
         "get_db": get_db,
         "row_to_dict": row_to_dict,
         "meta_fn": meta_fn,
+        "account_fn": account_fn,
         "views": views,
         "ohlcv_fn": ohlcv_fn,
     }
@@ -338,6 +340,21 @@ def register_hub_routes(app):
         meta = meta_fn() if callable(meta_fn) else {}
         return jsonify({"ok": True, "meta": meta})
 
+    @app.route("/api/hub/account")
+    @_hub_auth_required
+    def api_hub_account():
+        """中控 AI：资金账户 / 交易账户余额（无需浏览器登录）。"""
+        fn = _ctx().get("account_fn")
+        if not callable(fn):
+            return jsonify({"ok": False, "msg": "未配置 account_fn"}), 501
+        try:
+            data = fn()
+            if not isinstance(data, dict):
+                data = {}
+            return jsonify({"ok": True, **data})
+        except Exception as e:
+            return jsonify({"ok": False, "msg": str(e)}), 500
+
     @app.route("/api/hub/monitor")
     @_hub_auth_required
     def api_hub_monitor():