[FEATURE] Ability to reference files using the "@" symbol in the agent view

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

In the agent view, when I use the "@" symbol, I can only mention subagents, but not files from that project. I'd like to be able to mention the files so I don't have to open the IDE to copy the file path and paste it into Claude Code.

Proposed Solution

Use the "@" symbol or another method to reference files.

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_