refactor(profile): adjust spacing for tab bar and post wrapper

Reset `tabBarContainer` margin to 0 and apply `spacing.md` as `marginTop` to the `postWrapper` to correct layout positioning in the profile view.

src/screens/profile/useUserProfile.ts

@@ -461,7 +461,7 @@ export function createSharedProfileStyles(colors: AppColors) {
       flexGrow: 1,
     },
     tabBarContainer: {
-      marginTop: spacing.md,
+      marginTop: 0,
       marginBottom: 0,
     },
     contentContainer: {
@@ -474,7 +474,8 @@ export function createSharedProfileStyles(colors: AppColors) {
       paddingTop: spacing.sm,
     },
     postWrapper: {
-      marginBottom: spacing.md,
+      marginTop: spacing.md,
+      marginBottom: 0,
       backgroundColor: colors.background.paper,
       borderRadius: 16,
       overflow: 'hidden',