Guard destructive settings and radio actions

- Route reset campaign and tutorial replay through one reusable confirmation dialog; repeated presses cannot stack or emit twice.
- Keep emergency hold-to-send single-shot and cover the post-submit release.
- Add destructive-action regression checks, strings and documentation.

docs/smoke-checklist.md

@@ -46,3 +46,4 @@
 44. The Joke Shop opens on the Sunset Strip club: the black hall, signature canopy, circular **THE JOKE SHOP** sign, red curtains, west entrance, palms, dry hillside with houses, neighbouring frontage and the opposite side of Sunset all read from the door camera. Day lighting and late lighting both look correct; the guard can walk the sidewalk without leaving the nav bounds.
 45. Esc and right-click close only the top panel (Help, Settings, Pause, Review, Radio, timeline, inspection/wand, action wheel); Settings opened from the venue menu returns to the menu, Help no longer opens Pause behind it, and closing a modal recaptures the mouse without leaving the guard frozen.
 46. At 0.75× and 1.75× HUD font scale, long target names stay inside the target chip, the chip grows/caps correctly, and long button labels ellipsize instead of pushing panels off-screen.
+47. Reset campaign and Replay tutorial both ask for confirmation; a second click reuses the open dialog, Cancel does nothing, and OK fires once. Emergency send requires the full hold, sends exactly once, and does not send again on release.