Make hedge the default home and drop unused product-surface entries.

Put永期/期期对冲 first in nav, default embed tab to hedge_plan, and remove risk-policy/options-account UI instead of only hiding them.

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

lib/instance/instance_embed_lib.py

@@ -29,7 +29,7 @@ EMBED_TABS: tuple[str, ...] = (
 )
 
 PATH_TO_EMBED_TAB: dict[str, str] = {
-    "/": "trade",
+    "/": "hedge_plan",
     "/trade": "trade",
     "/dashboard": "dashboard",
     "/account_ledger": "account_ledger",
@@ -183,9 +183,9 @@ def register_embed_routes(
     @login_required
     @app.route("/embed")
     def embed_shell_page():
-        tab = (request.args.get("tab") or "trade").strip()
+        tab = (request.args.get("tab") or "hedge_plan").strip()
         if tab not in EMBED_TABS:
-            tab = "trade"
+            tab = "hedge_plan"
         session["hub_embed_shell"] = True
         resp = make_response(render_main_page_fn(tab, embed_mode="shell"))
         resp.headers["Cache-Control"] = "no-store, no-cache, must-revalidate, max-age=0"