Fix an incorrect static count being returned

[jcmosc]

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[augmentcode]

🤖 Augment PR Summary

Summary: Fixes aggregation of _ViewListOutputs.staticCount so the merged static count becomes nil as soon as any output lacks a static count.

Change: Updates the fold logic to only accumulate when the prior merged value is non-nil, preventing later non-nil entries from incorrectly “reviving” a static count.

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[augmentcode]

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[Kyle-Ye]

LGTM. Once a staticCount is nil, the mergedStaticCount should be nil instead of re-compute from zero