Improve chat names display, add support chat avatar, add translations, prevent mobile keyboard focus on category tab click

Helenarequested to merge
improve-chat-names-display into dev

Summary by CodeRabbit

  • New Features

    • Added accessibility ARIA labels for chat sidebar sections across many locales (multiple new translations), and updated a Spanish message translation.
    • Added optional custom avatar support for chat channels.
    • Introduced improved channel display name logic for clearer names.

  • Style

    • Improved mobile interaction styles and responsive text truncation for narrow viewports.

  • Chores

    • Updated CI cache key.

  • Bug Fixes

    • Removed automatic focus from the message input to avoid unexpected keyboard pop-ups.

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Edited by CodeRabbit

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