The Fee Reality widget — interactive fee-drag collapse, rendered from keel's recorded experiment numbers

[eaitbrahim]

The interactive counterpart of keel's README benchmark (keel #$KN): sliders for fee basis and spread, equity curves for generic TA families collapsing when priced honestly. The trader who has bled fees elsewhere recognizes the shape in ten seconds — that recognition is the whole product pitch.

Constraints

• Rendered from keel's recorded experiment numbers — synced from the engine repo via the existing engine-docs pattern, never hand-typed. If the records are absent at build time, the widget degrades to the last-known data (or hides), per the site's failure policy.
• Every displayed number traceable to its experiment record.
• No competitor naming in the widget or its copy — generic fee-drag curves only.
• HonestBox voice; trilingual (en/fr/ar); works on mobile.