fix(l2): a dot per DM send, lists that notice every change, the LED lit only on TX

- A pending DM shows a dot per send, as on the L1. The thread is read from
  the SD archive, which a resend never updated: it does now, and the
  thread's signature and patch state count the attempt.
- Nearby redraws when a node goes live, changes type or the units change;
  the scan popup when a name or the remote SNR arrives.
- The user LED is active high: it was lit all the time and went dark
  while transmitting.
- Sim hooks "dm" and "send" for testing a DM thread.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

examples/companion_radio/ui-core/MessageHistory.h

@@ -460,6 +460,9 @@ public:
         e.ack_tag         = expected_ack;   // each attempt has a distinct ACK CRC
         e.ack_deadline_ms = now + est_timeout + 4000;
         e.resends_left--;
+#ifdef HIST_ARCHIVE
+        if (_arc) _arc->dmUpdate(e);        // the thread is read from it: a dot per send
+#endif
       } else {
         failDm(e);                          // couldn't compose/send — give up
       }

examples/companion_radio/ui-lvgl/UITask.cpp

@@ -3177,8 +3177,9 @@ void UITask::refreshScanPopup() {
   uint32_t sig = (uint32_t)n + (_scanning ? 0x10000u : 0);
   for (int i = 0; i < n; i++) {
     const NearbyModel::Entry& e = _scan->at(i);
-    sig = sig * 31 + e.rssi * 7 + e.snr_x4 + e.is_known;
+    sig = sig * 31 + e.rssi * 7 + e.snr_x4 + e.remote_snr_x4 * 3 + e.type * 5 + e.is_known;
     for (int k = 0; k < 4; k++) sig = sig * 31 + e.pub_key[k];
+    for (const char* p = e.name; *p; p++) sig = sig * 31 + (uint8_t)*p;
   }
   if (sig == _scan_sig || vlist::pressed(_scan_list)) return;   // held: once it's let go
   _scan_sig = sig;
@@ -3224,10 +3225,12 @@ void UITask::openScanNode(int row) {
 
 // Changes whenever a rebuild would show something different.
 uint32_t UITask::nearbySignature() const {
-  uint32_t sig = (uint32_t)_nearby->count() * 2654435761u + _nearby->sortMode() + (_scanning ? 7 : 0);
+  uint32_t sig = (uint32_t)_nearby->count() * 2654435761u + _nearby->sortMode() + (_scanning ? 7 : 0)
+               + (_prefs && _prefs->units_imperial ? 13 : 0);
   for (int i = 0; i < _nearby->count(); i++) {
     const NearbyModel::Entry& e = _nearby->at(i);
-    sig = sig * 31 + e.contact_idx + (uint32_t)e.lastmod + (uint32_t)(e.dist_km * 100) + e.rssi + e.fav;
+    sig = sig * 31 + e.contact_idx + (uint32_t)e.lastmod + (uint32_t)(e.dist_km * 100) + e.rssi + e.fav
+        + e.type * 5 + (e.is_live ? 3 : 0);
     for (const char* p = e.name; *p; p++) sig = sig * 31 + (uint8_t)*p;
   }
   // Ages are shown in minutes, so let the list re-render once a minute anyway.
@@ -3730,7 +3733,7 @@ uint32_t UITask::threadSignature() const {
     sig = n;
     for (int j = 0; j < n && j < 8; j++) {
       const DmHistEntry& e = h.dmAtPos(h.dmHistEntryForContact(_thread_key, j));
-      sig = sig * 31 + e.timestamp + h.dmEffectiveStatus(e);
+      sig = sig * 31 + e.timestamp + h.dmEffectiveStatus(e) + e.attempt * 7;   // attempt: a dot per resend
     }
   }
   return sig;
@@ -4053,7 +4056,7 @@ void UITask::refreshThread() {
   };
   auto stateOf = [&](int i) -> uint32_t {
     if (_thread_is_channel) return s_th_ch[i].relay_status | (uint32_t)s_th_ch[i].path_len << 8;
-    return s_th_dm[i].outgoing ? 0x100u | h.dmEffectiveStatus(s_th_dm[i]) : 0;
+    return s_th_dm[i].outgoing ? 0x100u | h.dmEffectiveStatus(s_th_dm[i]) | (uint32_t)s_th_dm[i].attempt << 16 : 0;
   };
   // Entry i's bubble (at the list's end) and its menu / position slots.
   auto build = [&](int i) {
@@ -4091,7 +4094,13 @@ void UITask::refreshThread() {
         switch (h.dmEffectiveStatus(e)) {
           case ACK_OK:      st = LV_SYMBOL_OK; col = theme::OK; break;
           case ACK_FAIL:    st = LV_SYMBOL_CLOSE; col = theme::FAIL; break;
-          case ACK_PENDING: st = "..."; break;
+          case ACK_PENDING: {   // a dot per send, as ui-new: grows with each auto-resend
+            static char dots[9];
+            int k = e.attempt + 1 < 8 ? e.attempt + 1 : 8;
+            memset(dots, '.', k); dots[k] = '\0';
+            st = dots;
+            break;
+          }
           default:          st = ""; break;
         }
       }
@@ -4657,6 +4666,13 @@ void UITask::simCompose(const char* text) {
   lv_textarea_set_text(_compose_ta, text);
 }
 
+void UITask::simDm() {
+  for (int i = 0; i < the_mesh.getNumContacts(); i++) {
+    ContactInfo c;
+    if (the_mesh.getContactByIdx(MAX_ANON_CONTACTS + i, c) && c.type == ADV_TYPE_CHAT) { openDM(c.id.pub_key); return; }
+  }
+}
+
 // Sim tests: straight to a screen by name.
 extern "C" EMSCRIPTEN_KEEPALIVE void sim_open(const char* name) {
   if (!s_ui) return;
@@ -4679,6 +4695,8 @@ extern "C" EMSCRIPTEN_KEEPALIVE void sim_open(const char* name) {
   if (!strncmp(name, "map@", 4)) { s_ui->simMapAt(name + 4); return; }   // "map@lat,lon,z"
   if (!strncmp(name, "channel@", 8)) { s_ui->openChannel(atoi(name + 8)); return; }
   if (!strncmp(name, "compose@", 8)) { s_ui->simCompose(name + 8); return; }
+  if (!strcmp(name, "dm")) { s_ui->simDm(); return; }
+  if (!strcmp(name, "send")) { s_ui->simSend(); return; }
   if (!strcmp(name, "vector")) { s_ui->setVectorMap(true); return; }
   if (!strcmp(name, "maptools")) { s_ui->navToolsPopup(); return; }
   if (!strcmp(name, "areasel")) { s_ui->areaSelectBegin(); return; }

examples/companion_radio/ui-lvgl/UITask.h

@@ -129,6 +129,8 @@ public:
   void setVectorMap(bool on);
   void simMapAt(const char* spec);      // Map tools > Live tiles
   void simCompose(const char* text);    // the open thread's field: this text, keyboard up
+  void simDm();                         // the first chat contact's thread
+  void simSend() { sendFromCompose(); } // the field, sent
   // Navigation map (NavMap.h)
   void navTargetsPopup();
   void navClosePopup();

variants/wio-tracker-l2/WioTrackerL2Board.cpp

@@ -77,8 +77,9 @@ bool WioTrackerL2Board::initExpander() {
   expSetOutput(EXP_PIN_GNSS_RST, HIGH);
   delay(10);
   expWritePin(EXP_PIN_GNSS_RST, LOW);
-  // user LED is driven active-low through the expander; idle level HIGH = off
-  expSetOutput(EXP_PIN_USER_LED, HIGH);
+  // user LED: lit while the pin is HIGH (it read as active-low before, and
+  // stayed lit except while transmitting); idle LOW = off
+  expSetOutput(EXP_PIN_USER_LED, LOW);
   delay(10);
   expSetOutput(EXP_PIN_GROVE_EN, HIGH);
   delay(10);
@@ -194,9 +195,8 @@ void WioTrackerL2Board::begin() {
 }
 
 void WioTrackerL2Board::setLed(bool on) {
-  // active low: HIGH = off
   if (expander_ok) {
-    expWritePin(EXP_PIN_USER_LED, !on);
+    expWritePin(EXP_PIN_USER_LED, on);
   }
 }
 

variants/wio-tracker-l2/WioTrackerL2Board.h

@@ -30,7 +30,7 @@
 #define EXP_PIN_GROVE_EN     7   // output - Grove port power
 #define EXP_PIN_TP_RST       8   // output - touch panel reset
 #define EXP_PIN_GNSS_RST     9   // output - GNSS reset (active HIGH)
-#define EXP_PIN_USER_LED    10   // output - mesh/user LED (active low)
+#define EXP_PIN_USER_LED    10   // output - mesh/user LED (active high; also GNSS wakeup)
 #define EXP_PIN_OTG_EN      11   // output - USB OTG power
 #define EXP_PIN_PA_EN       12   // output - speaker amp power
 #define EXP_PIN_GNSS_EN     13   // output - GNSS power