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## Description This PR fixes NavigationBar lacking visual feedback on the active destination indicator. This is a reland of https://github.com/flutter/flutter/pull/164484 which was reverted in https://github.com/flutter/flutter/pull/169497. After investigation, I narrowed down the regression introduced in https://github.com/flutter/flutter/pull/164484 to the usage of a RepaintBoundary. I added one test to verify that the regression which led to the revert of https://github.com/flutter/flutter/pull/164484 is no more reproducible. ### Before: The navigation indicator does not change color when hovered or focused: https://github.com/user-attachments/assets/a1e67dee-4a38-4711-ba90-bdcd9bed3226 ### After: The navigation indicator color changes (slightly darker): https://github.com/user-attachments/assets/1b1cc335-2cf4-4c41-9c53-696537707c72 ## Related Issue Fixes [NavigationBar lacks visual feedback when focused or hovered](https://github.com/flutter/flutter/issues/163871) ## Tests - Updates several helper functions which are used by several tests. - Updates several test: adding an Ink widget changes the coordinates used in several tests because these coordinates are now relative to the Ink offset. - Add one test to check that active destination moves to the correct destination (that was not the case after https://github.com/flutter/flutter/pull/164484). This new test is a golden test.
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