fix(workflow): Settings graph view clips the second parallel card (取证) outside its frame and off the canvas #1752

Problem

Written-by: FlyBotDebugger LIVE visual recheck (Asia/Shanghai 2026-10-30 ~09:10), About FlyBot 0.2.14, DeepSeek Harness 0.2.1-rc.2, 1280x800.

Settings → Workflows → 「FlyBot issue 快线」 (view mode, Back/Edit header) lays out the parallel step wrongly:

1. The second parallel card 取证 / 真机取证 sits outside the dashed "Parallel branch, then join" frame, below-right of Gate, and is cut off by the canvas's right edge. Its status chip shows only Q….
2. The dashed frame itself runs off the right edge instead of enclosing both branches.
3. The Claim → 取证 wire curves out to the right and ends with its arrowhead at the clip line. You need the horizontal scrollbar to see the card.

The same clipping shows in Edit mode (chip cut to Que…).

Expected

• Both parallel cards sit side by side inside the dashed frame, which fits within the canvas width (or the graph scales to fit), like the room side panel Flow tab now does.
• No wire ends at the clip edge.

Notes

Different surface from #1738 (drawer Edit plane overlap) and #1483 (canvas nested scroll / faint edges). Live runs and #1445 untouched.