Fix portal direct payment rendering

portal

PORTAL CHANGES

removed the cluttor in the sessions page

Add per-device portal payment options

Add tenant token management endpoints

Add portal payment display mode controls

Add tenant direct payment token sales

inline engine.js to fix captive portal WebView script loading

improve phone input UX and fix migration crash safety

serve engine.js under /portal/engine.js for nginx reverse proxy

replace plan buttons with radio inputs for reliable selection

add checkmark to selected plan button on captive portal

refactor captive portal: system font, customization wired in, UX fix

better captive portal

Initial commit — multi-tenant WiFi hotspot monetization platform