Graffics for book

Features & updates: Rewrote the connectors logic to align with standard button behaviour, updating all related components across the playground, shared models, and landing page. Renamed the "Share" button to "Deploy Agent" and updated its icon to a rocket. Updated the styling for the footer and personalized block to meet the latest design requirements. Added a new toggle feature to show or hide prompt examples directly within the playground chat screen. Bug fixes: Fixed a UI bug that caused the trial modal to appear in the incorrect position. Resolved a z-index layout issue with the scroll-down button. Fixed an issue that prevented CSV files from being uploaded via the brain select dropdown in the playground chatbox. Corrected styling issues with the dark/black theme on the "upload file to brain" pop-up. Updated frontend and backend domain validation rules to resolve an issue that blocked certain valid domains from being added for parsing. Fixed a UI bug where users with paid accounts were incorrectly shown a premium upgrade indicator (purple star) when selecting LLMs after clicking the "Regenerate" button.