add ship stats panel to ship layout dialog

src/lib/sim/ShipStatsCalculator.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include <optional>
+#include <string>
+#include <vector>
+
+#include "GameConfig.h"
+#include "ShipLayout.h"
+
+// Effective stats for a ship with a given layout, after applying all passive
+// module modifiers per REQ-MOD-STAT-CALC. Values are in display units:
+// speeds in tiles/s, ranges in tiles, accelerations in tiles/s² or rad/s².
+struct ShipStats
+{
+    float hp;
+    float maxSpeed_tps;
+    float sensorRange_tiles;
+    float mainAcceleration_tpss;
+    float maneuveringAcceleration_tpss;
+    float angularAcceleration_radpss;
+    float maxRotationSpeed_radps;
+
+    struct WeaponStats
+    {
+        float combinedDps;
+        float maxRange_tiles;
+    };
+
+    struct SalvageStats
+    {
+        float combinedCollectionRate;
+        float maxRange_tiles;
+    };
+
+    struct RepairStats
+    {
+        float combinedRepairRate_hps;
+        float maxRange_tiles;
+    };
+
+    std::optional<WeaponStats>  weapons;
+    std::optional<SalvageStats> salvage;
+    std::optional<RepairStats>  repair;
+};
+
+ShipStats calculateShipStats(const GameConfig& config,
+                              const std::string& shipId,
+                              int level,
+                              const std::vector<PlacedModule>& modules);