fix(desktop): use native boost confirmation dialog

[OttoApocalypse69]

Summary

• replace the Electron title-bar boost warning overlay with a native confirmation dialog
• keep the renderer warning for browser-only fallback mode
• add regression coverage for the IPC bridge and BrowserView-safe flow

Verification

pm test (96 passing)

ode --check main.js

ode --check preload.js

• Electron shell launched successfully after reinstalling dependencies with ELECTRON_RUN_AS_NODE cleared