let any blueprint transfer configuration, not just single-building ones

Implements 0593f48. A coinciding building of a configurable type now takes
the blueprint's settings whatever the blueprint's size, so dropping a
constellation over a partial copy of itself configures what is already
standing there instead of leaving it blank.

The whole behaviour change is one branch in resolveBlueprintGhost: at a
matching rotation, a coinciding building transfers if its type has settings
and is a compatible overlap otherwise; at a differing rotation only a
single-building blueprint still transfers. GameWorldView and WorldRenderer
needed nothing -- they already switch on the action, already exclude
transfers from the cost, and already tint them.

blueprintHoldsOneBuilding survives only as that rotation carve-out, and the
header now says so.

Note for anyone testing this by hand: the carve-out is narrower than it
reads. It is only reachable for footprints that survive rotation -- 1x1
bodies like the splitter, or fully filled symmetric ones. A miner's body is
L-shaped ("AA" / "A>"), so a rotated miner ghost covers different tiles and
coincides with nothing at all. That is the coincidence test doing its job,
not these rules, but it cost one wrong test before it was noticed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JcReq7hVk4KUPhTDKWAG7K

src/lib/sim/PlacementRules.h

@@ -82,9 +82,11 @@ struct BlueprintGhostResolved
 };
 
 // Classifies one ghost of a blueprint against the current factory state
-// (REQ-UI-BLUEPRINT-OVERLAP, REQ-UI-BLUEPRINT-TRANSFER). `blueprintHoldsOneBuilding` is
-// the blueprint's stored size, counted before locked types are dropped, so the gesture
-// does not change behavior as the player unlocks things.
+// (REQ-UI-BLUEPRINT-OVERLAP, REQ-UI-BLUEPRINT-TRANSFER). `blueprintHoldsOneBuilding`
+// only widens the transfer rule to differently-facing targets; a same-facing target
+// transfers whatever the blueprint's size. It is the blueprint's stored size, counted
+// before locked types are dropped, so the gesture does not change behavior as the player
+// unlocks things.
 //
 // Shared by the ghost coloring and the click path so a preview cannot disagree with what
 // the click then does -- the same reason resolveBeltDragPath is shared.