fix selection panel contents

src/ui/selection/AutoProductionContent.cpp

@@ -3,6 +3,7 @@
 #include "Building.h"
 #include "BuildingTarget.h"
 #include "GameConfig.h"
+#include "ProductionRules.h"
 
 AutoProductionContent::AutoProductionContent(const SelectionContext& context,
                                              const SelectionRequest& request,
@@ -19,6 +20,27 @@ BufferedBuildingContent::CycleInfo AutoProductionContent::getCycleInfo(
     // REQ-BLD-REPROCESSING), so its production section is always shown -- but only a
     // running cycle names a recipe, so while it is idle there is no cycle to describe.
     info.runsProduction = true;
+
+    if (target.building)
+    {
+        // What the building handles at all, so its buffers are not blank whenever it
+        // happens to be between cycles (REQ-UI-SINGLE-SELECTION). This is the same union
+        // of every recipe of its type that the simulation sized the buffers over, and
+        // the locked ones among them are dropped when the card lists them.
+        for (const RecipeDef* recipe :
+             gatherCandidateRecipes(*getContext().config, *target.building))
+        {
+            for (const RecipeIngredient& ingredient : recipe->inputs)
+            {
+                info.handledInputs.push_back(ingredient.item);
+            }
+            for (const RecipeOutput& output : recipe->outputs)
+            {
+                info.handledOutputs.push_back(output.item);
+            }
+        }
+    }
+
     if (!target.building || !target.building->production.has_value())
     {
         return info;