Update combined static Vd and weight-based settings

src/hooks/useAppState.ts

@@ -52,6 +52,38 @@ export const useAppState = () => {
               }
             }
           }
+
+          // Migrate weightBasedVd from old {enabled, bodyWeight} to new standardVd structure
+          const oldWeightBasedVd = (migratedPkParams.advanced as any).weightBasedVd;
+          if (oldWeightBasedVd && typeof oldWeightBasedVd === 'object' && 'enabled' in oldWeightBasedVd) {
+            // Old format detected: {enabled: boolean, bodyWeight: string}
+            if (oldWeightBasedVd.enabled) {
+              // Convert to new weight-based preset
+              migratedPkParams.advanced.standardVd = {
+                preset: 'weight-based',
+                customValue: migratedPkParams.advanced.standardVd?.customValue || '377',
+                bodyWeight: oldWeightBasedVd.bodyWeight || '70'
+              };
+            } else {
+              // Keep existing standardVd, but ensure bodyWeight is present
+              if (!migratedPkParams.advanced.standardVd?.bodyWeight) {
+                migratedPkParams.advanced.standardVd = {
+                  ...migratedPkParams.advanced.standardVd,
+                  bodyWeight: oldWeightBasedVd.bodyWeight || '70'
+                };
+              }
+            }
+            // Remove old weightBasedVd property
+            delete (migratedPkParams.advanced as any).weightBasedVd;
+          }
+
+          // Ensure bodyWeight exists in standardVd (for new installations or old formats)
+          if (!migratedPkParams.advanced.standardVd?.bodyWeight) {
+            migratedPkParams.advanced.standardVd = {
+              ...migratedPkParams.advanced.standardVd,
+              bodyWeight: '70'
+            };
+          }
         }
 
         // Validate numeric fields and replace empty/invalid values with defaults