First, I need to add the SDK dependency back since the new code uses it, then rewrite page.tsx:

The SDK isn't in package.json currently. I need to add it back and rewrite page.tsx with the exact code provided:

Rewrote page.tsx with the exact code requested. It uses a dynamic import('@farcaster/miniapp-sdk') with the named { sdk } export to call sdk.actions.ready(), falling back to postMessage signals if the SDK fails. Also re-added @farcaster/miniapp-sdk@^0.2.2 to package.json since the code depends on it.

The calculator heading needs to go inside components/calculator.tsx at the top of the component's return JSX, before the display section.

Added a centered <h1> with "Sasta Jugad" in white (text-foreground) at the top of the calculator component, right above the display area. No calculator logic or buttons were touched -- only the heading was inserted.