Fix Turret chnage not affecting DPM

packages/website/src/components/Tankopedia/CharacteristicsSection/components/Modules.tsx

@@ -176,11 +176,17 @@ export function Modules() {
           (turret) => turret.id === unlock.id
         )!;
 
-        if (
-          !draft.protagonist.turret.guns.some(
-            (gun) => gun.id === draft.protagonist.gun.id
-          )
-        ) {
+        // Check if current gun exists in new turret
+        const gunInNewTurret = draft.protagonist.turret.guns.find(
+          (gun) => gun.id === draft.protagonist.gun.id
+        );
+        
+        if (gunInNewTurret) {
+          // Gun exists - get it FROM this turret (this fixes the bug!)
+          draft.protagonist.gun = gunInNewTurret;
+          draft.protagonist.shell = gunInNewTurret.shells[0];
+        } else {
+          // Gun doesn't exist - select top gun from new turret
           draft.protagonist.gun = draft.protagonist.turret.guns.at(-1)!;
           draft.protagonist.shell = draft.protagonist.gun.shells[0];
         }
@@ -422,4 +428,4 @@ export function Modules() {
       </Flex>
     </ConfigurationChildWrapper>
   );
-}
+}