Fold remote switches into the switch list and own their hold timing

[enaboapps]

Remote switches now live in the same list as keyboard switches, with the same editor, names and hold actions, and the PC owns hold timing for them.

Settings UI

• The separate Remote switches panel and its Save button are gone. A switch forwarded from Switchify Remote is a row like any other, with a Remote N badge and a phone icon. Edit opens the same editor: name, press action, ordered hold actions with the timing note, Done and Remove.
• Add remote switch takes the next free number; the editor's Remote switch select changes the number, which matches the switch's position on Remote's Forwarding screen. Remote switches can be named; unnamed ones show as Remote switch N.
• Remote edits save as they happen, with the shared status line and a Retry save band on failure.

Behaviour

• Saved remote assignments, the shared hold interval and a scan mode change apply to a live remote session instead of ending it: saving resets only the scanner and local key broker, and the session restarts on the next tick with the applied settings. Learning a key still ends the session, since the key broker must be free. A change that leaves the current mode without its required actions ends the session, since scanning could not continue.
• Session start no longer rejects a stale profile revision. The PC applies its current assignments; Remote's labels are informational and refresh when profiles are reloaded.
• Holding a remote switch past the emergency limit resets the scan and keeps the session, mirroring the local emergency hold.
• A replaced press from Remote arrives as a sync without the switch followed by a fresh down, so the PC resets the gesture rather than treating the missing release as a selection.

The remote slot schema gains an optional name; files without it load unchanged. save_switches and configure_point_scan no longer bump the remote profile revision.

Companion

Switchify Remote must stop applying its hold-to-stop and idle limits to scanning profiles for holds longer than five seconds to reach the PC. That change is in the companion Remote PR switchifyapp/switchify-remote#173; until it ships, remote holds are capped by the phone's hold-to-stop setting.

Validation

tsc, 149 frontend tests plus 5 Node tests, cargo fmt, Clippy all targets with warnings denied, 362 Rust unit tests and 7 integration tests passed on Windows. An independent review of the first head found that live apply was dead behind the pause and that a replaced press could select; both are fixed with tests, along with focus after moving a remote switch or opening a remote draft. New tests cover remote rows in the list, editing in place, adding into the next free slot, moving a slot, removing with a failed save and retry, live application of config to a session, and names flowing into bindings and labels. Tests use fake input and do not send desktop input.

Physical Android to PC checks remain manual: a remote hold longer than five seconds offering hold actions, editing assignments during a live session, and the emergency hold resetting without ending the session.