Fix shareTitle prop typo in ShareButton component

[Copilot]

The ShareButton component used shareTite (typo) instead of shareTitle, causing the title to be dropped when invoking mobile native share.

Changes:

• Renamed prop from shareTite to shareTitle in ShareButton component and PropTypes
• Updated all test expectations to use correct parameter name
• Fixed ResourceModal caller to pass shareTitle

Before:

// ShareButton.jsx
function ShareButton({ shareUrl, shareTite, shareText }) {
  shareHandler({ shareUrl, shareTite, shareText });
  //                       ^^^^^^^^^ typo - utils.js expects shareTitle
}

After:

// ShareButton.jsx
function ShareButton({ shareUrl, shareTitle, shareText }) {
  shareHandler({ shareUrl, shareTitle, shareText });
  //                       ^^^^^^^^^^ now matches utils.js interface
}

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