re-cover copy-settings through single-building blueprints

src/ui/GameWorldView.h

@@ -187,6 +187,16 @@ private:
     std::optional<BuildingId> siteAtTile(QPoint tile) const;
 
     void     placeBlueprintAtTile(QPoint center);
+    // resolveBlueprintGhost (PlacementRules) for one building of the blueprint currently
+    // in placement mode, anchored at the cursor tile `center`.
+    BlueprintGhostResolved resolveBlueprintGhostHere(const BlueprintBuilding& building,
+                                                     QPoint center) const;
+    // The blueprint's stored recipe or schematic id, or empty when it stores none or the
+    // stored one is currently locked (REQ-LOCK-UI-BLUEPRINT).
+    std::string unlockedRecipeId(const BlueprintBuilding& building) const;
+    // Applies a single-building blueprint's settings to the building it is hovering,
+    // instead of placing anything (REQ-UI-BLUEPRINT-TRANSFER).
+    void     transferConfigTo(BuildingId id, const BlueprintBuilding& source);
 
     // Drops despawned or fully-collected debris from the selection
     // (REQ-UI-DEBRIS-CLICK-SELECT). Called each frame from onFrame().