Task 581: Fix Inline Viewer Local Scene from/to + Add Sync Tests

Status: DONE

Description

The templates.ts inline 3D viewer (__prepareScene) has two issues found by

code review:

1. Bug: Saturn/Uranus local scene timeline.transfers[0] objects are missing

from/to fields. Since Task 580 made getOrbitForTransfer() depend on these

fields, the ship marker never animates in inline local scenes.

1. Test gap: No test verifies that the inline __prepareScene output matches

the TypeScript prepareFullRouteScene/prepareSaturnScene/prepareUranusScene

output. Constants are duplicated between the two implementations.

Fix

• Add from/to to inline viewer's Saturn and Uranus timeline transfers
• Add a sync test comparing inline script constants against data module
• Add test for planetLongitudesAtMissionStart precedence in data module

Files

• ts/src/templates.ts — fix missing from/to in local scenes
• ts/src/templates.test.ts — add sync test for inline script constants
• ts/src/orbital-3d-viewer-data.test.ts — add planetLongitudesAtMissionStart precedence test