Session cockpit owns view status

The mevedel view buffer presents mevedel-owned status and menu entry points instead of proxying gptel's clickable header line. The raw data buffer may keep gptel's normal header, while the view routes mode, model, tools, skills, plugins, worktree, and help through the session cockpit. This lets mevedel replace broad gptel transient retargeting advice with a narrow bridge for explicitly opening gptel-menu from the paired data buffer.

Inspection rows above the composer expand locally rather than opening a cockpit as a side effect. Named management actions still open the owning cockpit. In the status strip, Goal status/turns and model name have separate links: the model label always opens Model, even when a Goal exists. Previously the combined Goal/model label changed the model's destination to Goal; separating them keeps each label's action predictable.