migrate to app_links package

[malik1004x]

Issue Number (if Applicable): Fixes #

Description

Please include a summary of the changes and which issue is fixed / feature is added.

Pull Request - Checklist

• Initial Manual Tests Passed
• Double check modified code and verify it with the feature/task requirements
• Format code
• Look for code duplication
• Clear naming for variables and methods
• Manual tests in accessibility mode (TalkBack on Android) passed

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Note

Medium Risk
Deep-link entry behavior changes with a new package and no explicit initial-URI handling on launch, which can affect wallet navigation from external links.

Overview
Replaces the forked uni_links dependency with app_links 7.0.0 and wires deep links through AppLinks().uriLinkStream in Root.initUniLinks() (method name unchanged).

Link listeners are simplified by passing handleDeepLinking directly to both the app-link stream and quickActionsStream. The previous getInitialUri() call on startup is removed, so cold-start deep links may no longer be processed unless app_links delivers them another way.

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