[QA] VERIFIED - Issue correctly identified as duplicate of TRCKR-663. All 7 E2E tests for uploading attachments to issues exist in tests/e2e/test_issue_attachment_upload.py (commit 10bfca5) and collect successfully. No additional work needed. See /tmp/qa-TRCKR-674.md for detailed QA report.

## Investigation Complete **Finding**: This issue is a duplicate. The E2E tests for uploading attachments to issues were already implemented in TRCKR-663. ### Existing Test Coverage The test file tests/e2e/test_issue_attachment_upload.py (added in commit 10bfca5) contains comprehensive tests: 1. test_upload_file_attachment_to_issue - Basic file upload flow 2. test_upload_attachment_with_custom_title - Custom title functionality 3. test_upload_image_attachment_shows_in_gallery - Image uploads appear in gallery 4. test_upload_multiple_attachments - Sequential multiple uploads 5. test_upload_attachment_cancel_button - Cancel discards without upload 6. test_uploaded_attachment_can_be_downloaded - Download verification 7. test_attachment_header_count_updates - Count badge updates correctly ### Test Verification - Tests collect successfully (7 tests) - Tests are skipped when Docker is unavailable (expected behavior) - Code imports correctly without errors **Recommendation**: Mark as done - no additional work needed.