fold_adaptive_nav_platform_interface

The common platform interface for fold_adaptive_nav: the FoldState data model, the FoldStateCodec wire format and the FoldPlatform base class.

App code should depend on fold_adaptive_nav, not this package.

Writing an implementation

Extend FoldPlatform (or MethodChannelFold to reuse the channels) and set FoldPlatform.instance from your package's registerWith.

Channels: fold_adaptive_nav/methods (snapshot, setVerticalSystemBarDisabled), fold_adaptive_nav/state (full state maps) and fold_adaptive_nav/angle (doubles, at most one per frame). Every state map carries "v": 1. Decoding ignores unknown keys and maps unknown enum strings to unknown/unspecified.