Widget totals strip renders segments glued — '⣾ 1 running/bin/bash.011727K tok' (separators dropped in dd9a segment refactor)

[rz1989s]

Summary

The widget's totals strip renders its segments glued together without separators: ⣾ 1 running$0.101732K tok — the · separators from the spec mockup (§Appendix: ⣾ 2 running · $0.94 · 598K tok) are gone.

Repro

1. Run pi with the fleet extension, fire a foreground run (any model)
2. Look at the widget strip (pi footer area): ⣾ 1 running$0.011727K tok — cost and tok segments are concatenated with no separator, and $0.01 runs into 1727K producing an ambiguous 0.011727K

Root cause

renderWidgetLines (src/panel/widget-rows.ts:224) joins segments with .join("") — and widgetSegments (line 200-204) pushes segments without separator entries:

const segs: Segment[] = [{ text: `${spin} `, status: "running" }];
if (running > 0) segs.push({ text: `${running} running`, token: "text" });
if (cost > 0) segs.push({ text: `$${cost.toFixed(2)}`, token: "text" });
if (tok > 0) segs.push({ text: `${fmtTokens(tok)} tok`, token: "text" });

Introduced in the P1 review refactor dd9a ("renderWidgetLines delegates to widgetSegments") — the pre-refactor version carried separators; the refactor to the segment model dropped them.

Expected

Per the normative mockup, segments join with · (the widget is a totals strip; note P3's footerSep │ applies to the PANEL hint bar, not the widget). Minimal fix: interleave { text: " · ", token: "muted" } between segments in widgetSegments, or join with a separator in renderWidgetLines.

Found while

P3 real-pi smoke (feat/104-fleet-presentation-p3 @ 6c66299), unicode pane. Pre-existing since P1's #104 review refactor — not a P3 regression.