[FEATURE] More beginner-friendly UI and interaction patterns, closer to ChatGPT/Kimi-style GUI products

Feature Request

Is your feature request related to a problem? Please describe.

opencode is a powerful AI coding agent, but its terminal-first UX is a barrier for less technical users who are used to GUI products like ChatGPT or Kimi Work (e.g. the desktop app with a chat window, file browser, and browser automation).

Users coming from those products expect:

• A visual chat interface that is easy to navigate without knowing keyboard shortcuts
• Familiar interactions: point-and-click, visible buttons, clearer message bubbles
• Lower-friction onboarding for non-developers

Describe the solution you'd like

Continue improving the Desktop App / Web UI as first-class interfaces that mimic the interaction patterns users already know from ChatGPT/Kimi:

• A polished chat window with clear message layout
• Visual file/project explorer
• Guided onboarding for first-time users
• Discoverable buttons instead of only keyboard shortcuts

Additional context

This is more about "friendliness" (友好度) than raw capability — the underlying agent is already good. A gentler UI would help non-developers and newcomers adopt opencode.

Environment: Windows, opencode desktop app / web UI.