This commit introduces file upload capabilities to the AI Bot conversations interface and improves the overall dedicated UX experience. It also changes the experimental setting to a more permanent one.
## Key changes:
- **File upload support**:
- Integrates UppyUpload for handling file uploads in conversations
- Adds UI for uploading, displaying, and managing attachments
- Supports drag & drop, clipboard paste, and manual file selection
- Shows upload progress indicators for in-progress uploads
- Appends uploaded file markdown to message content
- **Renamed setting**:
- Changed `ai_enable_experimental_bot_ux` to `ai_bot_enable_dedicated_ux`
- Updated setting description to be clearer
- Changed default value to `true` as this is now a stable feature
- Added migration to handle the setting name change in database
- **UI improvements**:
- Enhanced input area with better focus states
- Improved layout and styling for conversations page
- Added visual feedback for upload states
- Better error handling for uploads in progress
- **Code organization**:
- Refactored message submission logic to handle attachments
- Updated DOM element IDs for consistency
- Fixed focus management after submission
- **Added tests**:
- Tests for file upload functionality
- Tests for removing uploads before submission
- Updated existing tests to work with the renamed setting
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Co-authored-by: awesomerobot <kris.aubuchon@discourse.org>
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