Get all UI preferences
Returns every UI preference blob stored for the authenticated user as a map keyed by preference key. Used by the web terminal and mobile app to hydrate chart settings, active indicators, per-contract drawings, order-form defaults, sounds and similar preferences in a single call at login. Keys are namespaced strings such as chart_settings, indicators, drawing_defaults, order_form, ui, sounds, journal, terminal, chart_interval, hotkeys, dom_settings (DOM ladder preferences), chart_layout (multi-chart grid) and drawings:<CONTRACT> (one per contract, e.g. drawings:ESU6). The data value of each entry is an opaque JSON document owned by the client that wrote it.