move blueprints out of the sidebar into Ctrl+C / Ctrl+V dialogs

The blueprint panel is gone; the side panel column now holds the selected
building panel alone at full height. Saving is Ctrl+C on the current
selection, and picking one for placement is a new frameless modal card grid
opened with Ctrl+V, or handed to directly after a confirmed save.

BlueprintPanel sheds its widget half and becomes BlueprintLibrary: the list,
its disk round-trip, capture, and the T hotkey, with no widget of its own.
MainWindow owns it and drives both dialogs, because ModalPauseScope needs a
GameWorldView and only MainWindow has one. Both handlers hold a single pause
scope and a single dim scope across the save-to-select handoff, so the dim
does not blink and the simulation is not resumed in between.

The two facts a card derives -- the per-type contents summary and the plain
cost total -- go into lib/sim next to captureBlueprintFromSelection so they
can be unit tested; src/ui is off the test include path. They are kept apart
from GameWorldView's placement total, which excludes locked types and
rotate-in-place targets and is a different number by design.

A card's delete icon is a sibling of the card body rather than one of its
children: Qt disables a widget's children along with it, and the delete has
to stay live on an unaffordable card.

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

src/lib/sim/BuildingConfig.h

@@ -11,6 +11,7 @@
 #include "ShipLayout.h"
 
 class Simulation;
+struct BuildingsConfig;
 
 // The user-configurable settings of a single building or construction site: the
 // selected recipe / ship schematic, the shipyard module layout, and (for
@@ -49,6 +50,29 @@ Blueprint captureBlueprintFromSelection(const Simulation&              sim,
                                         const std::vector<BuildingId>& selectedIds);
 
 // True if any selected id refers to a player-placeable building or construction site
-// (the enable condition for the Create Blueprint button, REQ-UI-BLUEPRINT-CREATE).
+// (the condition under which Ctrl+C opens the blueprint save dialog,
+// REQ-UI-BLUEPRINT-CREATE).
 bool selectionHasPlaceableBuilding(const Simulation&              sim,
                                    const std::vector<BuildingId>& selectedIds);
+
+// One "<building name> x <count>" entry of a blueprint card's contents line
+// (REQ-UI-BLUEPRINT-CARD).
+struct BlueprintContentEntry
+{
+    std::string buildingName;
+    int         count;
+};
+
+// Summarizes what a blueprint holds: one entry per building type it contains, ordered
+// by descending count with ties broken by the order the types appear in buildings.toml
+// (which is the order of the build button bar, REQ-UI-BUILD-BAR). Building types absent
+// from the config sort last. Derived display data for the blueprint card, kept here so
+// it is unit-testable rather than buried in the dialog (REQ-UI-BLUEPRINT-CARD).
+std::vector<BlueprintContentEntry> summarizeBlueprintContents(
+    const Blueprint& blueprint, const BuildingsConfig& buildings);
+
+// Plain sum of the placement cost of every building in the blueprint
+// (REQ-UI-BLUEPRINT-CARD). Distinct from the total charged on placement
+// (REQ-UI-BLUEPRINT-PLACE), which additionally excludes locked building types and
+// rotate-in-place targets; see GameWorldView's placement path.
+int computeBlueprintCost(const Blueprint& blueprint, const BuildingsConfig& buildings);