Renames 314 defs and 41 module/class-level constants. Keeps 11 names underscored where the stripped form collides in scope, plus 5.5.0 shims for the three symbols external service repos call.
Adds prompt_user() and uses it for local, remote, and Proton VPN input. Replaces click.prompt on the remote auth path, which ignored the theme and overlapped active Live displays. Remote auth now exits on EOF instead of POSTing an empty answer and spinning the poll loop.
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