Only create session when user sends first message - no empty sessions

Remove Quick Test and Auto-create new session on Playground entry

Add assistant attribution to messages

� MULTI-ASSISTANT SUPPORT: Label each message with assistant info

� MAJOR UX IMPROVEMENTS: Enhanced Assistant Design & Testing Experience

Simplify rename assistant UI - replace inline editing with clean dialog

Add custom assistant name dialog - user can now set custom names instead of using system prompt

Add assistant rename and template auto-conversion features

Add assistant creation and fix dropdown display

Remove topbar from Assistant Studio interface

� CRITICAL BUTTON CONTAINER FIX: Added missing flex gap-1 wrapper

� FINAL STRUCTURAL FIX: Unified background + matched conditional elements

Fix Configuration header alignment

� FINAL FIX: Match Configuration structure EXACTLY to Sessions

Fix Configuration header positioning - Now truly aligned at top

� Align Configuration header with Sessions - No more border separation

⚖️ Perfect symmetry - Align Configuration header with Chat Sessions

� Harmonious top bar design - Perfect visual balance

Natural collapse design with symmetric layout

� Implement sidebar collapse functionality - Remove Sessions button

Fix Sessions sidebar default visibility

Simplify UI - Remove redundant information and streamline interface

� Fix SelectGroup error - Assistant Studio now works properly

� Unify Assistant concept - Single dropdown for all assistants

�️ Redesign Assistant concept - Logical separation of concerns

� Refactor right sidebar into organized tabbed layout

� Redesign Templates page with GPT Store-inspired layout

Fix scrolling issue in Assistant Studio - Proper height constraints

Fix dragging issue + Rebrand as Assistant Building Platform

Merge My Assistants into Chat Playground - Complete workflow integration

Merge Community into Home page - Complete integration and cleanup

Add Community templates to Home page - Display featured templates below main CTA for better discovery

Fix empty Home page - restore essential CTA button and features summary

� 修复预设system prompt显示在聊记录中的问题

� 修复页面间一致性问题

� 全面清理所有页面 - 大幅简化和优化

� 大幅清理和简化Playground界面

Fix Model Catalog navigation in Playground

Fix Playground panel sizing and convert Quick Presets to dropdown

Enhance Playground with ChatGPT-style large configuration panel - 600px wide settings with 300px system prompt area

Fix TypeScript error: remove unused BookOpen import

Restructure user workflow: ChatGPT-style Assistant Builder + Pure Chat Interface

Fix TypeScript errors and rebuild

Update static files with new Home page design

Fix TypeScript error: remove unused Badge import in Assistants page

Remove unused type prop from AssistantCard usage

Update static files with assistant functionality

Clean up hardcoded non-functional UI elements - remove unused nav links and settings

Fix API baseUrl for HF Spaces - use current domain for all environments

Add markdown rendering to chat messages with ReactMarkdown