[Reddimus]

A preview forced into a strip by a small window could interpret its header's Expand button as Collapse. It then stayed collapsed after the window grew. Choose the requested state from the visible lane, using the existing expansion helper.

Validation: full just gauntlet; matching macOS and Linux release GUI/worker builds; native Linux card and viewer suites; native macOS collapse/expand and constrained-resize button checks. The regression covers ordinary menu collapse/expand and both menu and header-button expansion after resizing.

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge; no actionable defects were found.

Summary

Header toggles now choose expand or collapse from the visible preview instead of its saved request.

• Preview header buttons follow the lane’s visible state.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart TD
  A["Header toggle"] --> B{"Visible preview is a strip?"}
  B -->|Yes| C["Save expanded = true"]
  B -->|No| D["Save expanded = false"]
  C --> E{"Enough room?"}
  E -->|Yes| F["Show expanded preview"]
  E -->|No| G["Keep strip and expansion request"]
  G -->|"Window grows"| F
  D --> H["Show collapsed strip"]

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