v2.7.1: Fix layout collisions on Watchlist screens and empty-sky timer

Three small layout bugs found after v2.7.0:
- Watchlist info screen title now wraps word-by-word via
  layoutWrapped() instead of println(), which cut it off mid-word.
- Watchlist overview screen draws the "?" info button first, so the
  title and two description lines start below it instead of running
  underneath and getting obscured.
- The radar's "empty sky for..." timer now shows only whole minutes
  once past the first minute (e.g. "2min" instead of "2min 05s"),
  since the seconds suffix collided with the range button.

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

src/radar_screen.cpp

@@ -622,11 +622,17 @@ void render(TFT_eSPI& tft, int16_t top) {
             // antippen"-Hinweises (der hier ohnehin ins Leere liefe) zeigen
             // wir an, wie lange der Himmel schon leer ist.
             uint32_t emptySec = (millis() - lastAircraftSeenMs) / 1000;
-            char buf[24];
+            char buf[16];
             if (emptySec < 60) {
                 snprintf(buf, sizeof(buf), "%lus", (unsigned long)emptySec);
             } else {
-                snprintf(buf, sizeof(buf), "%lum %02lus", (unsigned long)(emptySec / 60), (unsigned long)(emptySec % 60));
+                // Ab der ersten vollen Minute NUR noch Minuten anzeigen (ohne
+                // Sekunden) - "1min 05s" war zu lang und stiess an den
+                // Reichweiten-Button rechts daneben. Abgerundet (60-119s =
+                // "1min", 120-179s = "2min", usw.) - intuitiv wie eine
+                // normale Stoppuhr-Minutenanzeige.
+                unsigned long minutes = emptySec / 60;
+                snprintf(buf, sizeof(buf), "%lumin", minutes);
             }
             tft.print(String(I18n::t(StringId::RADAR_EMPTY_SKY_PREFIX)) + buf);
         } else {