fix(ui): Diagnostics' Reset counters now confirms like every other destructive action

The Hold-Enter popup was a single "Reset counters" item with no Cancel
row, so one Enter zeroed all stats immediately -- the same shape the
Trail/channel/preset resets had before beginConfirm() fixed them.

release-notes.md

@@ -21,7 +21,7 @@
 - **Tools › Nodes refused to make a Locator target out of a node whose full public key it didn't have**, even with a perfectly good position on screen — the row you get when someone shares their location on a channel and isn't in your contacts, which is exactly the group-outing case the feature is for. One flag was standing in for two different things: "can be pinged" (needs the whole 32-byte key) and "can be identified" (needs only a 6-byte prefix, which is all a person target ever uses). Those are separate now, so **Set as target** is offered whenever the node has a position: with an identity it follows them as they move, and without one — a channel share, matched by name — it pins the place they were last seen, the same way a waypoint or a location out of a message does. **Navigate** was never restricted and is unchanged.
 - **Tools › Locator's target picker listed the people pinned to the Favourites Dial as its top tier**, which stopped making sense once pinning and favouriting became separate things — pinning puts something on a home page, and has nothing to say about who you'd geofence. The picker now leads with your **favourites** instead (still offered before they have a known position, so you can arm ahead of time); everyone else with a resolvable position follows, as before.
 - **Hold Enter no longer doubles as a second Back key.** On Tools, Locator, Live Share, Repeater, Remote Bot, Auto-Advert, GPIO, Compass, the Dashboard config and the Messages navigate view it quietly meant "go back", while on other screens the same gesture opens a context menu — so the same long press did two unrelated things depending on where you were. It now only ever opens a menu (or does nothing where there is none), and Back is the single way back. This also applies inside an open popup, which Hold Enter used to dismiss — and, last of all, inside the on-screen keyboard: Hold Enter on Space, OK/Done or the `{}` placeholder cell used to close the keyboard exactly like Cancel; it's now a no-op there too, alongside its real jobs on Shift (caps-lock) and Backspace (clear field) and its accent popup on a Latin letter.
-- **Deleting a channel, deleting a saved radio preset, and Trail's "Reset trail" all fired immediately on a single Enter, with no way back.** Deleting a contact already asks first and defaults to Cancel; these three didn't, and Reset trail was the worst of them — it wipes the entire recorded GPS trail with no undo short of a prior manual Save, more destructive than the GPS-off prompt already sitting one menu over in the same screen. All three now confirm the same way contact-delete does.
+- **Deleting a channel, deleting a saved radio preset, Trail's "Reset trail", and Diagnostics' "Reset counters" all fired immediately on a single Enter, with no way back.** Deleting a contact already asks first and defaults to Cancel; these four didn't, and Reset trail was the worst of them — it wipes the entire recorded GPS trail with no undo short of a prior manual Save, more destructive than the GPS-off prompt already sitting one menu over in the same screen. All four now confirm the same way contact-delete does.
 - **The one alert after a successful advert or message send didn't match the rest of the app's toasts.** `"Advert sent!"` / `"Advert failed.."` and `"Sent!"` were the only alerts anywhere with trailing punctuation; every other confirmation (`"Preset saved"`, `"Contact added"`, `"Target set"`, …) is bare. Also, unpinning something from the Favourites Dial reported which slot it came out of on some screens but not others — pinning always said so, unpinning only did from the Messages screens. Both now match the rest.
 
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