Add Web Share API button for opening with native apps

[devin-ai-integration]

Add Web Share API button for opening with native apps

This PR adds a new "Open with your app" button to the result viewer component, allowing users to share the generated repository content with native applications using the Web Share API.

Changes

• Add new shareResult function to handle Web Share API integration
• Add canShareFiles utility to detect browser support
• Add "Open with your app" button with the same styling as existing buttons
• Add analytics tracking for share events
• Implement feature detection to only show the button in supported browsers

Testing

• Tested all functionality locally
• Verified that the button only appears in browsers that support Web Share API
• Confirmed that sharing works correctly with native applications
• All tests and lint checks pass

Screenshots

The new "Open with your app" button appears alongside the existing Copy and Download buttons:

Link to Devin run

https://app.devin.ai/sessions/dffddff07173432c9552915b676bfc25

Requested by: yamadashy (koukun0120@gmail.com)

[devin-ai-integration]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.24%. Comparing base (e7b7ac4) to head (94d0cdc).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #615   +/-   ##
=======================================
  Coverage   90.24%   90.24%           
=======================================
  Files          96       96           
  Lines        4920     4920           
  Branches     1020     1020           
=======================================
  Hits         4440     4440           
  Misses        480      480           

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[yamadashy]

moved

• feat: add mobile-only Web Share API for native app integration #616