fix(solo): six fixes from the 2026-07-05 UI audit

- locked device: a ringing alarm/timer was invisible — wakeForAlarm() now
  holds the lock wake window for the whole ring, the lock screen draws the
  alert overlay, and a key-dismissed ring falls back to a 5 s glance
- status bar: A / live-share / trail / repeater icons no longer vanish when
  Bluetooth is off (moved outside the isSerialEnabled() gate)
- alert overlay: long text wraps to up to 3 lines inside the box instead of
  overflowing the border (new UITask::renderAlertOverlay, shared with lock)
- MyMesh: force NUL on contact.name copied from an app frame (unterminated
  name could overrun the AdvertPath strcpy)
- clock tools: ring/timer deadline compares now wrap-safe (signed diff),
  matching the trail/loc-share timers
- messages: channel context menu freezes its target channel at open; fav
  toggle no longer retargets the menu when the fav-only filter drops the row

All three solo envs build green (WioTrackerL1 OLED/Eink, GAT562-30S).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

examples/companion_radio/MyMesh.cpp

@@ -211,6 +211,10 @@ void MyMesh::updateContactFromFrame(ContactInfo &contact, uint32_t& last_mod, co
   memcpy(contact.out_path, &frame[i], MAX_PATH_SIZE);
   i += MAX_PATH_SIZE;
   memcpy(contact.name, &frame[i], 32);
+  // The frame comes from the app and nothing guarantees a NUL inside the 32
+  // bytes; an unterminated name would later overrun strcpy/strlen consumers
+  // (e.g. the AdvertPath name cache).
+  contact.name[sizeof(contact.name) - 1] = '\0';
   i += 32;
   memcpy(&contact.last_advert_timestamp, &frame[i], 4);
   i += 4;