Typing anything into the /examples search box threw "Cannot read
properties of undefined (reading 'map')" and blanked the page. The
haystack the search matches against is built from
`example.components.map(...)`, and `components` was undefined on 27
examples.
`components` is required by `ExampleProject`, so this reads as
impossible — but the gallery is assembled from overlay example modules
whose factories end in `as unknown as ExampleProject`, and the compiler
stops checking there. The field is a promise the type makes and cannot
keep, so the three places that read it now cope with its absence.
CircuitPreview is the one that matters most: it renders as the fallback
whenever an example's thumbnail 404s, so it meets exactly the examples
nobody has generated art for yet.
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