In-app browser with tabs, and remember its width per session

[TheNomadInOrbit]

MonoCode version

0.1.42

Operating system

macOS

OS version

macOS 26.6.2

Provider CLI

Codex

What happened

What I want

A full in-app browser, not just a preview. Multiple tabs, the way Codex does it, so I can keep a few pages open while I work in one session.

And the part that matters more to me: the browser width should be remembered per session. Some threads I want a wide browser, others a narrow one. Right now I would have to drag it back every time I switch threads.

Why

Inspecting a frontend currently means leaving the conversation. PR #147 adds a preview pane, which is a good start, but it is a single view in the file pane with no tabs and no per-session memory.

Context

Related: #147 (open, in-app preview pane in the file pane), #145 (closed proposal)

Steps to reproduce

Current behavior:

1. Open a session and try to inspect a frontend: the only option is the file-pane preview (PR Add an in-app web preview pane #147), which is a single view with no tabs
2. Switch to another thread and come back: any width you dragged the pane to is not remembered per session
3. To inspect multiple pages you have to leave the conversation

Desired behavior:

1. Open a full in-app browser inside the session, with multiple tabs like Codex
2. Keep several pages open while working in the same session
3. Have the browser width remembered per session, so each thread keeps its own width without re-dragging

[hardbeat920]

@TheNomadInOrbit i suggest to check this #153 as browser is currently not on the roadmap but if more people upvote it we can add it