update: langchain and etc

[CocoRoF]

This pull request introduces several improvements and new features across the codebase, with a focus on standardizing database schema parameter naming, expanding database sync API capabilities, and refactoring the canvas node rendering logic for greater extensibility. Below are the most important changes:

Database API Enhancements and Schema Parameter Standardization

• Standardized the naming convention for database schema parameters in dataManagerAPI.js, changing schema to dbSchema or schemaName as appropriate, and updated the corresponding API request bodies to use db_schema or schema_name keys. This ensures consistency and prevents confusion when interacting with backend APIs. [1] [2] [3] [4] [5] [6] [7]

• Added a comprehensive set of database sync management API functions, including adding, removing, pausing, resuming, checking status, listing all syncs, triggering manual sync, checking scheduler health, and updating MLflow configuration. These utilities will enable robust management of automated and manual database synchronization from the frontend.

Canvas Node Rendering Refactor

• Refactored the CanvasNodes component to use a new findSpecialNode utility, allowing dynamic detection and rendering of special node types (like routers, schema providers, or custom nodes) based on configuration. This replaces hardcoded logic with a more extensible approach, making it easier to add new node types in the future. [1] [2]

• Updated the props and rendering logic for CanvasNodes to support AgentXgen-specific functionality and to pass only relevant props to special node components, improving maintainability and flexibility. [1] [2]

Styling Improvements

• Updated SCSS usage to replace the deprecated darken function with the new color.adjust function from sass:color, ensuring future compatibility and consistency in button hover styles. [1] [2]