feat: hub setting to hide account balances and PnL in monitor

Persist show_account_pnl in hub_settings.json; refine key monitor panel layout with right-aligned live stats and scrollable history (max 8 rows).

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

manual_trading_hub/hub.py

@@ -67,6 +67,7 @@ from settings_store import (
     enabled_exchanges,
     env_force_disabled_ids,
     load_settings,
+    normalize_display_prefs,
     save_settings,
 )
 from hub_web_auth import (
@@ -676,8 +677,13 @@ def api_get_settings():
     return load_settings()
 
 
+class SettingsDisplayBody(BaseModel):
+    show_account_pnl: bool = True
+
+
 class SettingsBody(BaseModel):
     exchanges: list[dict] = Field(default_factory=list)
+    display: SettingsDisplayBody | None = None
 
 
 @app.post("/api/settings")
@@ -691,7 +697,11 @@ def api_save_settings(body: SettingsBody):
             row["enabled"] = False
         row.pop("env_disabled", None)
         to_save.append(row)
-    save_settings({"version": 1, "exchanges": to_save})
+    existing = load_settings()
+    display = normalize_display_prefs(existing.get("display"))
+    if body.display is not None:
+        display = normalize_display_prefs(body.display.model_dump())
+    save_settings({"version": 1, "exchanges": to_save, "display": display})
     return {"ok": True, "settings": load_settings()}