feat: thread footer component redesign

[khushal87]

This pull request refactors the ThreadFooterComponent to simplify its styling and improve theme consistency. The main changes include removing the SVG gradient background, consolidating styles using a new useStyles hook, and updating the theme structure for thread footer styling.

Component and Styling Refactor:

• Removed the SVG gradient and related code from ThreadFooterComponent, replacing it with a solid background and border styles for a cleaner, more maintainable look. [1] [2]
• Consolidated styles into a new useStyles hook that uses theme primitives and semantic colors, improving consistency and maintainability.

Theme Structure Updates:

• Updated the theme type definition so that thread.newThread now contains separate container and text style objects, supporting more granular customization.
• Modified the default theme to provide empty container and text objects for thread.newThread, aligning with the new structure.

Minor Cleanups:

• Removed unused imports and old style definitions from ThreadFooterComponent.tsx. [1] [2]
• Updated the snapshot tests to reflect the new thread footer layout and styling. [1] [2]

[Stream-SDK-Bot]

SDK Size

title	develop	branch	diff	status
js_bundle_size	375 KB	375 KB	0 B	🟢