File operations - rename, new file, new folder, delete in file browser

[smirki]

Description

The file browser currently lacks basic file management operations. Users should be able to perform standard file operations directly from the file browser UI.

Code Reference

• orchestrator/app/agent/tools/file_ops/ - existing agent file operation tools (can be reused)

Current Behavior

Users can only view files in the browser. To create, rename, or delete files, they must ask the agent or use the terminal.

Expected Behavior

Right-click context menu or action buttons in the file browser for:

1. New File - create a new empty file in the selected directory
2. New Folder - create a new directory
3. Rename - rename a file or folder
4. Delete - delete a file or folder (with confirmation dialog)

Acceptance Criteria

• All four operations available via context menu or action buttons
• Delete shows confirmation dialog
• File browser refreshes after each operation
• Operations work in both Docker and Kubernetes modes
• Backend API endpoints for each operation (or reuse existing agent tool endpoints)