Better accuracy

src/engine/rocketExportImport.js

@@ -6,7 +6,7 @@ export { downloadBlob }
  * Build a rocket design JSON Blob for download.
  * Schema version 1: inputs section is re-importable; results is reference-only.
  */
-export function exportRocketJSON({ outerRadius, tankConfig, propDensities, payload, structure, engineData, geometry }) {
+export function exportRocketJSON({ outerRadius, tankConfig, propDensities, payload, structure, engineData, geometry, noseConeShape }) {
   const payload_ = {
     version: 1,
     type: 'rocket_design',
@@ -17,6 +17,7 @@ export function exportRocketJSON({ outerRadius, tankConfig, propDensities, paylo
       propDensities,
       payload,
       structure,
+      noseConeShape,
     },
     engineData: engineData ?? null,
     results: geometry ?? null,
@@ -43,7 +44,7 @@ export function parseRocketImport(jsonString) {
     throw new Error(`Unsupported export version: ${data.version}`)
   }
 
-  const { outerRadius, tankConfig, propDensities, payload, structure } = data.inputs ?? {}
+  const { outerRadius, tankConfig, propDensities, payload, structure, noseConeShape } = data.inputs ?? {}
 
   return {
     outerRadius: outerRadius ?? null,
@@ -51,6 +52,7 @@ export function parseRocketImport(jsonString) {
     propDensities: propDensities ?? null,
     payload:     payload     ?? null,
     structure:   structure   ?? null,
+    noseConeShape: noseConeShape ?? null,
     engineData:  data.engineData ?? null,
   }
 }