Standardizes mobile navigation headers: Android uses Home’s shared
Flutter blur; iOS uses native soft edges, with graduated material
retained during large-title collapse and the iOS 26 fallback preserved.
Preserves Home’s upward title motion with a soft boundary and keeps the
avatar crop title visible.
Validation: 4,112 Flutter tests and 111 native tests passed after
merging main. Rendered partial-scroll regression verified on the iOS 27
simulator; removing either review fix fails its regression assertion.
The earlier preview was installed on a physical iPhone with the existing
profile.
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Signed-off-by: kenny lopez <klopez4212@gmail.com>
Co-authored-by: Terp <5856f6900e8e0a4e0ea1f4f8d2ee33e4753d2119bc122f94ecafc660b46c0511@buzz.block.builderlab.xyz>
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