Add hub order popup modal with compact instance trade embed (plan A).

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

tests/test_instance_embed_lib.py

@@ -20,6 +20,13 @@ def test_rewrite_embed_dest():
     assert "hub_theme=dark" in url
 
 
+def test_rewrite_embed_dest_order_popup_query():
+    url = rewrite_embed_dest("/trade?order_popup=1&symbol=BTC%2FUSDT")
+    assert "tab=trade" in url
+    assert "order_popup=1" in url
+    assert "symbol=BTC" in url
+
+
 def test_embed_tabs_cover_main_nav():
     assert "trade" in EMBED_TABS
     assert "key_monitor" in EMBED_TABS