test: unit test tweets v4

[bedosaber77]

This pull request significantly expands and improves the unit tests for the Content and Stats components in the tweets module, with a focus on increasing coverage for edge cases and user interactions. The changes also enhance test setup consistency and stub management across multiple test files.

Unit test enhancements and coverage:

• Added comprehensive edge case tests to Content.spec.ts, covering empty text, only images, empty arrays, long text, special characters, and emoji handling in the Content component.
• Introduced tests for user interactions in Content.spec.ts, including hashtag click navigation and quoted tweet rendering logic.
• Greatly expanded Stats.spec.ts with detailed tests for all interactive buttons (like, repost, bookmark, share, reply), optimistic UI updates, event emission, and proper stat formatting and display, including views.

Test setup and stubbing improvements:

• Standardized and improved stubbing of Nuxt composables and Vue Router in Content.spec.ts for more reliable navigation and routing tests.
• Enhanced global provide and stub configuration in Stats.spec.ts to support new interaction tests and inject required dependencies.
• Added helper and navigation utility mocks in Tweet.spec.ts for more robust and isolated component testing.

Code style and consistency:

• Improved code formatting and consistency in stub definitions and test arrangement across all affected test files. [1] [2] [3] [4]

These changes together result in more robust, thorough, and maintainable unit tests for tweet-related components.

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References:

• Content component edge case and interaction tests
• Stats component interaction and display tests
• Nuxt composable and router stubbing improvements [1] [2]
• Utility mocks and code style updates [1] [2] [3] [4] [5]