Roster: title into the tab bar, flip the split, rebuild the config view

[ANonABento]

Section title moves into the tab bar

The Roster's own header block (title + caption) is gone. The workspace tab strip now shows the section name instead of workspace tabs when you're not on the board.

That's a correctness fix as much as tidying: agents are global, so a workspace selector in the Roster was chrome that changed nothing. Now the tab strip only offers a choice where the choice does something.

Split flipped

The list was taking ~65% and the dossier a fixed 380px — backwards, since the list is for scanning and the dossier is where the reading happens.

	before	after
list	flex-1 (~65%)	340px fixed
dossier	380px fixed	flex-1

340px fits two tiles per row, which is enough to scan a roster, and hands the rest to the pane that actually has content in it.

Configuration view rebuilt

It was a flat key-value list with a hairline under every row — a shape that treats a system prompt, a model name and a filesystem path as if they were peers. They aren't. Now grouped into cards, the pattern GitHub / Vercel / Stripe settings all use:

LLM      Instructions (spans, prose) │ Model │ Tools │ Skills │ Retrieval (v2)
Script   Command (spans)             │ Environment │ Outputs (v2)

• Card headers carry a count where one is meaningful (tools, skills, args)
• Paths, commands and tool ids are click-to-copy with a check-mark confirmation — those are values you paste elsewhere
• The system prompt gets max-w-prose; the wider pane happily ran it to ~150 characters per line
• Delete demoted from a full-width button to an icon — it sits beside two non-destructive actions and shouldn't carry equal weight
• Portrait moved beside the name rather than above it, so the wider pane doesn't carry a stretched banner

Two duplications cut, both found by looking at the rendered result

1. A separate Arguments card listed the exact values the Command card already showed.
2. Inside Command, a chip row and a full command line said the same thing twice.

What's left is the one line that actually gets run, copyable.

Also fixed: env keys like RENDER_THREADS were truncating in a 112px label column.

Verification

• tsc, eslint, IPC check (209), vitest run → 429, production build clean
• Walked all three runtimes in Chrome, plus the MCP-with-allow-list case and the missing-skill case, at 1500px