Title: @ file picker doesn't show gitignored files even when respectGitignore: false is set

[kingsleyonoh]

The @ file picker in T3 Code does not show gitignored files even when
"respectGitignore": false is set in both ~/.claude/settings.json
and ~/.claude.json.

Expected behavior
When respectGitignore: false is configured, the @ file picker should
show all files including gitignored ones — exactly as it does in Claude
Code CLI and CloudCLI.

Current behavior

• Works correctly in Claude Code CLI ✅
• Works correctly in CloudCLI ✅
• Does NOT work in T3 Code ❌

T3 Code only shows gitignored files in projects that have NO .gitignore
file at all. Projects with a .gitignore file never show gitignored files
in @ autocomplete regardless of the setting.

Use case
I have proprietary workflow files in a .agent/ folder that I gitignore
intentionally so they don't get committed to each project repo. I need
to be able to @ tag these files when sending prompts to Claude. This
works in every other Claude Code interface except T3 Code.

Environment

• T3 Code v0.0.15
• Windows 11
• "respectGitignore": false set in ~/.claude/settings.json