feat(agent):Supports custom agent and chat experience with refactoring (#957)

* feat: add agent management functionality with creation, editing, and deletion

* feat: enhance agent creation and chat experience

- Added AgentWelcome component to display agent description on new thread creation.
- Improved agent name validation with availability check during agent creation.
- Updated NewAgentPage to handle agent creation flow more effectively, including enhanced error handling and user feedback.
- Refactored chat components to streamline message handling and improve user experience.
- Introduced new bootstrap skill for personalized onboarding conversations, including detailed conversation phases and a structured SOUL.md template.
- Updated localization files to reflect new features and error messages.
- General code cleanup and optimizations across various components and hooks.

* Refactor workspace layout and agent management components

- Updated WorkspaceLayout to use useLayoutEffect for sidebar state initialization.
- Removed unused AgentFormDialog and related edit functionality from AgentCard.
- Introduced ArtifactTrigger component to manage artifact visibility.
- Enhanced ChatBox to handle artifact selection and display.
- Improved message list rendering logic to avoid loading states.
- Updated localization files to remove deprecated keys and add new translations.
- Refined hooks for local settings and thread management to improve performance and clarity.
- Added temporal awareness guidelines to deep research skill documentation.

* feat: refactor chat components and introduce thread management hooks

* feat: improve artifact file detail preview logic and clean up console logs

* feat: refactor lead agent creation logic and improve logging details

* feat: validate agent name format and enhance error handling in agent setup

* feat: simplify thread search query by removing unnecessary metadata

* feat: update query key in useDeleteThread and useRenameThread for consistency

* feat: add isMock parameter to thread and artifact handling for improved testing

* fix: reorder import of setup_agent for consistency in builtins module

* feat: append mock parameter to thread links in CaseStudySection for testing purposes

* fix: update load_agent_soul calls to use cfg.name for improved clarity

* fix: update date format in apply_prompt_template for consistency

* feat: integrate isMock parameter into artifact content loading for enhanced testing

* docs: add license section to SKILL.md for clarity and attribution

* feat(agent): enhance model resolution and agent configuration handling

* chore: remove unused import of _resolve_model_name from agents

* feat(agent): remove unused field

* fix(agent): set default value for requested_model_name in _resolve_model_name function

* feat(agent): update get_available_tools call to handle optional agent_config and improve middleware function signature

---------

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

backend/src/gateway/app.py

@@ -7,7 +7,7 @@ from fastapi import FastAPI
 
 from src.config.app_config import get_app_config
 from src.gateway.config import get_gateway_config
-from src.gateway.routers import artifacts, mcp, memory, models, skills, uploads
+from src.gateway.routers import agents, artifacts, mcp, memory, models, skills, uploads
 
 # Configure logging
 logging.basicConfig(
@@ -100,6 +100,10 @@ This gateway provides custom endpoints for models, MCP configuration, skills, an
                 "name": "uploads",
                 "description": "Upload and manage user files for threads",
             },
+            {
+                "name": "agents",
+                "description": "Create and manage custom agents with per-agent config and prompts",
+            },
             {
                 "name": "health",
                 "description": "Health check and system status endpoints",
@@ -128,6 +132,9 @@ This gateway provides custom endpoints for models, MCP configuration, skills, an
     # Uploads API is mounted at /api/threads/{thread_id}/uploads
     app.include_router(uploads.router)
 
+    # Agents API is mounted at /api/agents
+    app.include_router(agents.router)
+
     @app.get("/health", tags=["health"])
     async def health_check() -> dict:
         """Health check endpoint.