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/test/BuildingConfigTest.cpp

@@ -139,3 +139,100 @@ TEST_CASE("readBuildingConfig returns nullopt for an unknown id", "[copyconfig]"
     Simulation sim(loadTestConfig(), 7);
     CHECK_FALSE(readBuildingConfig(sim, kInvalidBuildingId).has_value());
 }
+
+// The derived facts a blueprint card shows (REQ-UI-BLUEPRINT-CARD). They live here
+// rather than in the dialog so they can be tested: src/ui is off the test include path.
+
+namespace
+{
+Blueprint makeBlueprint(const std::vector<BuildingType>& types)
+{
+    Blueprint blueprint;
+    for (const BuildingType type : types)
+    {
+        BlueprintBuilding building;
+        building.type     = type;
+        building.rotation = Rotation::East;
+        blueprint.buildings.push_back(building);
+    }
+    return blueprint;
+}
+}  // namespace
+
+TEST_CASE("computeBlueprintCost sums the constituent placement costs", "[blueprint]")
+{
+    const GameConfig cfg = loadTestConfig();
+
+    // belt 2 + belt 2 + miner 15.
+    const Blueprint blueprint = makeBlueprint(
+        {BuildingType::Belt, BuildingType::Belt, BuildingType::Miner});
+    CHECK(computeBlueprintCost(blueprint, cfg.buildings) == 19);
+}
+
+TEST_CASE("computeBlueprintCost ignores types absent from buildings.toml", "[blueprint]")
+{
+    const GameConfig cfg = loadTestConfig();
+    REQUIRE(cfg.buildings.findBuildingDef(BuildingType::Hq) == nullptr);
+
+    const Blueprint blueprint = makeBlueprint({BuildingType::Belt, BuildingType::Hq});
+    CHECK(computeBlueprintCost(blueprint, cfg.buildings) == 2);
+}
+
+TEST_CASE("computeBlueprintCost is zero for an empty blueprint", "[blueprint]")
+{
+    const GameConfig cfg = loadTestConfig();
+    CHECK(computeBlueprintCost(Blueprint{}, cfg.buildings) == 0);
+}
+
+TEST_CASE("summarizeBlueprintContents orders by descending count", "[blueprint]")
+{
+    const GameConfig cfg = loadTestConfig();
+
+    const Blueprint blueprint = makeBlueprint(
+        {BuildingType::Belt, BuildingType::Smelter, BuildingType::Miner,
+         BuildingType::Miner, BuildingType::Smelter, BuildingType::Miner});
+
+    const std::vector<BlueprintContentEntry> summary =
+        summarizeBlueprintContents(blueprint, cfg.buildings);
+    REQUIRE(summary.size() == 3);
+    CHECK(summary[0].buildingName == "Miner");
+    CHECK(summary[0].count == 3);
+    CHECK(summary[1].buildingName == "Smelter");
+    CHECK(summary[1].count == 2);
+    CHECK(summary[2].buildingName == "Belt");
+    CHECK(summary[2].count == 1);
+}
+
+TEST_CASE("summarizeBlueprintContents breaks ties in buildings.toml order", "[blueprint]")
+{
+    const GameConfig cfg = loadTestConfig();
+
+    // Miner is declared after Belt in buildings.toml, which is the order the build
+    // button bar lays its buttons out, so Belt wins the tie despite the equal counts
+    // and despite sorting later by enum value.
+    const Blueprint blueprint = makeBlueprint(
+        {BuildingType::Miner, BuildingType::Belt, BuildingType::Miner, BuildingType::Belt});
+
+    const std::vector<BlueprintContentEntry> summary =
+        summarizeBlueprintContents(blueprint, cfg.buildings);
+    REQUIRE(summary.size() == 2);
+    CHECK(summary[0].buildingName == "Belt");
+    CHECK(summary[1].buildingName == "Miner");
+}
+
+TEST_CASE("summarizeBlueprintContents spells multi-word ids as display names", "[blueprint]")
+{
+    const GameConfig cfg = loadTestConfig();
+
+    const Blueprint blueprint = makeBlueprint({BuildingType::TunnelEntry});
+    const std::vector<BlueprintContentEntry> summary =
+        summarizeBlueprintContents(blueprint, cfg.buildings);
+    REQUIRE(summary.size() == 1);
+    CHECK(summary[0].buildingName == "Tunnel Entry");
+}
+
+TEST_CASE("summarizeBlueprintContents is empty for an empty blueprint", "[blueprint]")
+{
+    const GameConfig cfg = loadTestConfig();
+    CHECK(summarizeBlueprintContents(Blueprint{}, cfg.buildings).empty());
+}