allow to unlock modules when destroying defence stations

src/lib/core/SchematicDropEvent.h

@@ -5,10 +5,11 @@
 // Emitted in tick step 9 (Deaths & loot) when a destroyed enemy-defence-station
 // set awards a schematic (REQ-DEF-SCHEMATIC-DROP). The UI renders a toast
 // (REQ-UI-SCHEMATIC-TOAST); wasNewUnlock chooses between the "unlocked" and
-// "level -> N" wording.
+// "level -> N" wording. isModuleSchematic selects ship vs. module toast text.
 struct SchematicDropEvent
 {
-    std::string schematicId;   // matches ShipDef::id in the config.
+    std::string schematicId;   // matches ShipDef::id or ModuleDef::id in the config.
     int newLevel;
     bool wasNewUnlock;
+    bool isModuleSchematic;
 };