v0.5.1: give every session notice a line of its own

[jayhesselberth]

The pane border had become the place everything went: OVER QUOTA, SHORT SESSION, and a scrolling offer to install the Claude Code hooks, three unrelated things sharing one rule and taking turns for it — directly above the one line you glance at for the job id.

They move below the status bar instead, onto tmux status lines of their own.

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 ● session 245772 | compute07                                     Help: Ctrl+b h | Detach: Ctrl+b d
 ⚠ OVER QUOTA  30.2T / 30T · over by 204.8G │ SHORT SESSION · ends before monthly-maint at Thu 06:00
 Claude Code: run sinteractive --install-claude to enable the skills and hooks

• Warnings nearest the session line (both hold for the whole session, so they share a line); the Claude hint furthest away, since it is only an offer.
• Each line exists only while it has something on it, so a session with nothing to say is exactly as tall as before, and the pane gets its row back the moment a warning clears.
• The hint no longer scrolls — a full-width line fits the whole sentence at 80 columns, which retires the 0.3s redraw the marquee forced on every session that showed it.
• The pane border is back to a plain rule with no text.

One tmux subtlety, found by rendering against a live client rather than by reading the manual: setting one element of an option array at session scope replaces the whole array for that session instead of overlaying the global one. A session-scoped status-format[1] therefore leaves status-format[0] empty and the session line silently disappears. The extra indices are set globally instead.

Verified by attaching a real client at 100 and 80 columns across every combination: nothing, hint alone, quota alone, quota + short session + hint, and back to nothing. At 80 columns the hint fits whole and the warnings truncate from the right, which is the correct end to lose.

Docs updated in README, the man page, docs/scripting.md, the bodhi-storage skill, and the --agent-context briefing. Release commit bumps VERSION, pixi.toml, the man page .TH, and the docs/deploy.md example to 0.5.1.

🤖 Generated with Claude Code