fix: register a dusk navigate adapter so ext.dusk.navigate drives GoRouter

[anilcancakir]

Fixes REPORT friction items #8, #13.

MagicDuskIntegration.install() registered 14 enrichers but no navigate adapter, so dusk:navigate --route was a no-op on GoRouter apps (it fell back to an ignored SystemNavigator broadcast). Registers an adapter via DuskPlugin.registerNavigateAdapter that calls MagicRouter.instance.to(path), returning false on an uninitialised router (StateError).

TDD. analyze 0, format 0-diff, flutter test 86 pass. The frozen dusk typedef is registered through, not modified; uses .to (path), not .toNamed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[Copilot]

Pull request overview

This PR fixes ext.dusk.navigate --route for GoRouter-based Magic apps by registering a Dusk navigate adapter during MagicDuskIntegration.install(), so Dusk navigation drives MagicRouter instead of falling back to the (ignored) SystemNavigator broadcast.

Changes:

• Register a DuskPlugin navigate adapter that calls MagicRouter.instance.to(path) and returns false when the router is not yet initialized (catches StateError).
• Clear the navigate adapter in MagicDuskIntegration.resetForTesting() for clean test isolation.
• Add integration tests covering adapter registration, reset behavior, and successful/unsuccessful navigation.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
test/dusk_integration_test.dart	Adds widget + unit tests to validate navigate adapter registration, behavior, and reset semantics.
lib/src/dusk_integration.dart	Registers/clears the Dusk navigate adapter as part of the Magic↔Dusk integration lifecycle.
CHANGELOG.md	Documents the new navigate adapter behavior in the Unreleased section.

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