fix(sim): live RTC restore + add sim_test_show_all_home_pages() hook

DataStore::restoreRTCTime() runs on every boot and, if a prior save
exists, overwrites RTCClock with that stale timestamp. Correct on real
hardware (no other way to know the time before a GPS fix or a phone/CLI
sync), but SimRTCClock is already backed by the real host wall clock from
construction -- overwriting it with an old IDBFS-persisted save made a
returning meshcore-solo-site visitor's on-screen clock drift away from
their own real time instead of just showing it. Guarded behind #ifndef
SIM_PLATFORM.

sim_test_show_all_home_pages() is a new sim-only test hook, same shape as
the existing sim_test_* hooks in this file: real hardware ships with a
curated 5-page Home carousel (NodePrefs::HP_DEFAULT) so a first-time user
isn't handed 13 pages to joystick through, with the rest opt-in via
Settings > Home Pages. meshcore-solo-site calls this once after boot to
show the whole feature set instead, without touching the real-hardware
default.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018iubftDmKNWmkNnhJRz8UH

examples/companion_radio/DataStore.cpp

@@ -862,7 +862,17 @@ void DataStore::restoreRTCTime() {
     uint32_t t = 0;
     file.read((uint8_t *)&t, sizeof(t));
     file.close();
+#ifndef SIM_PLATFORM
+    // Real hardware has no other way to know the time before a GPS fix or
+    // a phone/CLI sync, so restoring the last-known saved time is the
+    // right call there. The sim's RTCClock (SimRTCClock.h) is already
+    // backed by the real host wall clock (time(NULL)) from the moment it's
+    // constructed -- overwriting that with a stale save from a previous
+    // visit (persisted via IDBFS, see the site's "returning visitor" note)
+    // would make a returning instance's on-screen clock drift away from
+    // the visitor's own real time instead of just showing it.
     if (t > 1000000000UL) _clock->setCurrentTime(t);
+#endif
   }
 }