Three independent consistency passes:
1. **Message paths: unknown relays as grey full-hash**
The message-paths dialog showed unnamed relay hops as a single lit byte (e.g.
`e8`). Now they render at the device's path-hash-mode width, muted grey, and
annotated with their addressed byte — `e839f2 (e8)` — so the rows stay
readable and cross-reference the route graph's byte labels (matching named
hops' trace presentation). Added `hash_as_name` flag to path_text widget.
2. **Dialogs: multi-layer compositor + backdrop for empty stack**
Opening a confirm over a floating popup used to stretch that popup to
full-frame (the single-float compositor's bug). Now the compositor maintains
a pool of _MAX_DIALOG_LAYERS=8 centered-box floats, each rendering one layer
above the background — so a popup and its confirm both stay their own size.
Also: button_dialog/typed_confirm/autocomplete now float over a blank base
when the stack is empty (via _run_dialog_screen), guaranteeing popups render
as small boxes on an empty stack, not full-frame chrome. Simplified
message_dialog to delegate its backdrop logic to button_dialog.
3. **Data-loss dialogs: red `destructive` tier**
Added a second caution tier to the dialog API: danger=True stays amber
(disruptive: discard edits, reboot), destructive=True is red (irreversible
data loss). Updated: single-record delete, channel "clear slot", courier
"clear finished" (new confirm), and startup "remove device" (splash confirm).
Per UX spec: bulk/irreversible deletions gate behind typed_confirm (also red);
single-record delete is a red Cancel/[verb] button dialog.
All changes are backward-compatible. Full suite: 793 tests pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>