[popup] Fix controlled hover leave close

[atomiks]

Fixes #4815 (review)

Controlled popups that were opened externally could close when the pointer left the floating element. This keeps hover leave from closing only when the controlled open did not come from one of the popup's own open interactions.

Root cause

The hover interaction only knew about click-like trigger events, so externally controlled opens still looked hover-closeable once the pointer left the floating element.

Changes

• Track whether a popup is controlled in the floating root context.
• Skip hover-leave close handling only for externally controlled opens without an open event.
• Cover Menu, Popover, and PreviewCard controlled external opens and trigger-driven controlled opens.

[pkg-pr-new]

• base-ui-tanstack-start

• vite-css-base-ui-example

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/react@4893
  

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/utils@4893
  

commit: 3e17c5d

[code-infra-dashboard]

Bundle size

Bundle	Parsed size	Gzip size
@base-ui/react	🔺+133B(+0.03%)	🔺+40B(+0.03%)

Details of bundle changes

Performance

Total duration: 1,097.61 ms -151.41 ms^(-12.1%) | Renders: 50 ⁽⁺⁰⁾ | Paint: 1,672.50 ms -222.89 ms^(-11.8%)

Test	Duration	Renders
Slider mount (300 instances)	148.83 ms ▼-52.94 ms(-26.2%)	3 (+0)
Dialog mount (300 instances)	45.46 ms ▼-15.99 ms(-26.0%)	1 (+0)
Tooltip mount (300 contained roots)	43.23 ms ▼-12.36 ms(-22.2%)	1 (+0)

9 tests within noise — details

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Check out the code infra dashboard for more information about this PR.

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