feat(tui): add Project Files viewer/editor

[ryangamerdev]

Summary

Adds a file browser and viewer/editor panel to the TUI for viewing and editing project files directly within OpenCode.

Features

• Project Files Browser - File tree in sidebar showing project files with expand/collapse
• File Viewer Panel - View files with syntax highlighting, resizable panel with drag divider
• File Editor - Edit files directly in the TUI with save (ctrl+s) and cancel (ctrl+c)
• Focus Management - Proper keyboard focus between editor and prompt
  • Click to refocus editor panel
  • Keys only captured when editor textarea is focused

Files Changed

File	Changes
routes/session/project-files.tsx	File tree component
routes/session/content-panel.tsx	Panel wrapper with resize divider
routes/session/file-viewer.tsx	View/edit functionality
routes/session/sidebar.tsx	ProjectFiles integration
routes/session/index.tsx	ContentPanel integration

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

⚠️ Potential Duplicate Found

PR #7017 - "feat(tui): add Project Files viewer/editor with vi mode support"

• feat(tui): add Project Files viewer/editor with vi mode support #7017

Why it's related:

This PR appears to be a very similar or competing implementation of the same feature. Both PRs are:

• Adding a Project Files viewer/editor to the TUI
• Implementing file tree navigation and syntax-highlighted file viewing
• Adding file editing capability with keyboard shortcuts
• Using similar component structure (content-panel, file-viewer, etc.)

The main difference appears to be that PR #7017 includes vi mode support while the current PR #7021 focuses on standard editing controls (ctrl+s, ctrl+c).

Recommendation: Check if PR #7017 is already merged, in progress, or stale. If it's open, coordinate with that PR to either consolidate into one or ensure you're not duplicating efforts.

[ryangamerdev]

[ryangamerdev]

This was experimental, closing PR. Available on my personal fork if interested.

[qiangxue1206]

This was experimental, closing PR. Available on my personal fork if interested.

@ryanwyler Hello, I couldn't find the branch related to file editability on your personal fork. Could you upload it again for reference?