v1: Live ADS-B radar with detail panel, units, legend, proximity LED alert

src/aircraft_details.h

@@ -0,0 +1,27 @@
+#pragma once
+#include <Arduino.h>
+
+// Additional aircraft details (model) that are NOT part of the ADS-B signal
+// and get looked up via the free hexdb.io community database by hex code -
+// only for the currently selected aircraft (not for all of them, to keep
+// network load low).
+namespace AircraftDetails {
+
+    struct Info {
+        bool loading = false;
+        char model[40] = {0}; // e.g. "Airbus A320 216", empty if unknown
+    };
+
+    // Called from Core 1 (touch selection): marks that details should be
+    // fetched for this aircraft (if not already done).
+    void request(const char* hex);
+
+    // Called from Core 1 to get the current (possibly still incomplete)
+    // state for 'hex'.
+    Info get(const char* hex);
+
+    // Called periodically from NetTask (Core 0): performs a pending request
+    // (blocking HTTPS call, but that's fine - runs in the background and
+    // only briefly delays the next ADS-B poll).
+    void update();
+}