feat(hub): render AI summary account breakdown as icon table

Replace pipe-separated account lines with a structured table from stats_snapshot, including exchange icons and position remarks.

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

manual_trading_hub/hub_ai/context.py

@@ -271,6 +271,28 @@ def format_context_text(payload: dict) -> str:
     return "\n".join(lines).strip()
 
 
+def format_account_remark(ac: dict) -> str:
+    """分户表格备注：持仓摘要或关注点。"""
+    positions = ac.get("positions") or []
+    if not positions:
+        issues = ac.get("issues") or []
+        if issues:
+            return "；".join(str(x) for x in issues[:2])
+        return "无"
+    parts: list[str] = []
+    for p in positions[:3]:
+        if not isinstance(p, dict):
+            continue
+        sym = p.get("symbol") or "?"
+        side = p.get("side") or "?"
+        contracts = p.get("contracts") if p.get("contracts") is not None else p.get("size")
+        upnl = _position_float_pnl(p)
+        parts.append(f"持仓: {sym} {side} 张数{contracts} 浮盈亏{upnl:.4f}U")
+    if len(positions) > 3:
+        parts.append(f"另有{len(positions) - 3}仓")
+    return "；".join(parts) if parts else "无"
+
+
 def format_chat_context_brief(payload: dict, max_chars: int = 2500) -> str:
     text = format_context_text(payload)
     if len(text) <= max_chars: