* perf: enhance chat components with theme and fullscreen toggles
- Added theme and fullscreen toggle functionality to Chat.vue and ConversationSidebar.vue.
- Introduced a new StyledMenu component for improved dropdown menus.
- Updated MessageList.vue and ChatInput.vue for better mobile responsiveness and UI consistency.
- Enhanced language switcher integration in ConversationSidebar.vue.
- Added new settings translations in English and Chinese locales.
* fix: streamline conversation selection handling in Chat.vue
- Updated handleSelectConversation function to immediately set the current session ID and selected sessions, reducing the need for multiple clicks.
- Adjusted padding in ConversationSidebar.vue for improved layout consistency.
* refactor: message storage format of webchat
* refactor: update image and record handling in webchat event processing
* fix: thinking placeholder in webchat
* feat: supports file upload in webchat
* feat: supports to delete attachments when webchat session is deleted
* perf: improve performance of file downloading
* refactor: remove unused import in chat route
* feat: add message timestamp formatting and localization support in chat
* fix: handle missing filename in file upload for chat route
* feat: enhance file handling in chat and webchat, supporting video uploads and improved attachment management
* fix: update property name for embedded files in message handling
* fix: compute variable errors after uninstalling plugins
* feat: supported for reply message and standarlize the message param
* fix: ensure message actions are displayed for the last message in the list
* feat(chat): add standalone chat component and integrate with config page for testing configurations
* feat(chat): add error handling for message sending and session creation
- Introduced `ConversationSidebar.vue` for improved conversation management and sidebar functionality.
- Enhanced `MessageList.vue` to handle loading states and improved message rendering.
- Created new composables: `useConversations`, `useMessages`, `useMediaHandling`, `useRecording` for better code organization and reusability.
- Added loading indicators and improved user experience during message processing.
- Ensured backward compatibility and maintained existing functionalities.
