fix(macos): Fix image attachment not displaying in chat input

[doscode-kr]

Problem

When users selected images on macOS, the file path did not appear in the chat input field due to:

1. Duplicate case statement (script.ts:2099-2106)

   • JavaScript switch had two 'imagePath' cases
   • Only the last matching case executes
   • First (correct) handler was never executed

2. Data structure mismatch (extension.ts:1956-1959)

   • Backend sent: {type: 'imagePath', path: '/path'}
   • Frontend expected: {type: 'imagePath', data: {filePath: '/path'}}
   • Frontend couldn't find the data → silent failure

Solution

• Removed duplicate case statement in script.ts

  • Deleted lines 2099-2106
  • Only correct handler (lines 1979-2006) remains

• Unified data structure in extension.ts

  • Changed to send {data: {filePath}} format
  • Matches frontend expectation
  • Consistent with other message types

Testing

Tested in Extension Development Host (F5):

• ✅ Click image button → Finder opens
• ✅ Select single image → Path appears in chat input
• ✅ Select multiple images → All paths appear
• ✅ Cancel selection → No errors

Impact

• Users: macOS users can now attach images successfully
• Code Quality: Removed code duplication, unified data structure
• Compatibility: No breaking changes

Files Changed

• src/script.ts: Remove duplicate case (-11 lines)
• src/extension.ts: Fix data structure (+4, -1 lines)

[doscode-kr]

This fixes #102