Interactive Brachistochrone Calculator

Add an interactive WASM-powered brachistochrone calculator to the Episode 1 report page.

Users could adjust:

• Mars-Jupiter distance (slider for planetary geometry)
• Ship mass (to explore the mass ambiguity)
• Transfer time (to compare 72h vs 150h vs custom)

The calculator would show required acceleration, ΔV, and comparison with Kestrel's specs.

Implementation:

• Add brachistochrone functions to solar-line-wasm
• Load WASM on the episode page
• Simple sliders + output table

Status: RESOLVED

Implemented as Task 007. Calculator rendered on all episode pages with

per-episode presets, WASM/JS fallback, thrust slider, preset buttons, and verdict display.

See ts/src/calculator.js and renderCalculator() in ts/src/templates.ts.