feat: agent workflow builder (#2264)

* feat: implement WorkflowAgent and GraphExecutor for workflow management and execution

* refactor: workflow schemas and introduce WorkflowEngine

- Updated schemas in `schemas.py` to include new agent types and configurations.
- Created `WorkflowEngine` class in `workflow_engine.py` to manage workflow execution.
- Enhanced `StreamProcessor` to handle workflow-related data.
- Added new routes and utilities for managing workflows in the user API.
- Implemented validation and serialization functions for workflows.
- Established MongoDB collections and indexes for workflows and related entities.

* refactor: improve WorkflowAgent documentation and update type hints in WorkflowEngine

* feat: workflow builder and managing in frontend

- Added new endpoints for workflows in `endpoints.ts`.
- Implemented `getWorkflow`, `createWorkflow`, and `updateWorkflow` methods in `userService.ts`.
- Introduced new UI components for alerts, buttons, commands, dialogs, multi-select, popovers, and selects.
- Enhanced styling in `index.css` with new theme variables and animations.
- Refactored modal components for better layout and styling.
- Configured TypeScript paths and Vite aliases for cleaner imports.

* feat: add workflow preview component and related state management

- Implemented WorkflowPreview component for displaying workflow execution.
- Created WorkflowPreviewSlice for managing workflow preview state, including queries and execution steps.
- Added WorkflowMiniMap for visual representation of workflow nodes and their statuses.
- Integrated conversation handling with the ability to fetch answers and manage query states.
- Introduced reusable Sheet component for UI overlays.
- Updated Redux store to include workflowPreview reducer.

* feat: enhance workflow execution details and state management in WorkflowEngine and WorkflowPreview

* feat: enhance workflow components with improved UI and functionality

- Updated WorkflowPreview to allow text truncation for better display of long names.
- Enhanced BaseNode with connectable handles and improved styling for better visibility.
- Added MobileBlocker component to inform users about desktop requirements for the Workflow Builder.
- Introduced PromptTextArea component for improved variable insertion and search functionality, including upstream variable extraction and context addition.

* feat(workflow): add owner validation and graph version support

* fix: ruff lint

---------

Co-authored-by: Alex <a@tushynski.me>

frontend/package.json

@@ -19,13 +19,20 @@
     ]
   },
   "dependencies": {
+    "@radix-ui/react-dialog": "^1.1.15",
+    "@radix-ui/react-popover": "^1.1.15",
+    "@radix-ui/react-select": "^2.2.6",
+    "@radix-ui/react-slot": "^1.2.4",
     "@reduxjs/toolkit": "^2.10.1",
     "chart.js": "^4.4.4",
+    "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "cmdk": "^1.1.1",
     "copy-to-clipboard": "^3.3.3",
     "i18next": "^25.5.3",
     "i18next-browser-languagedetector": "^8.2.0",
     "lodash": "^4.17.21",
+    "lucide-react": "^0.562.0",
     "mermaid": "^11.12.1",
     "prop-types": "^15.8.1",
     "react": "^19.1.0",
@@ -38,10 +45,11 @@
     "react-redux": "^9.2.0",
     "react-router-dom": "^7.6.1",
     "react-syntax-highlighter": "^15.6.1",
+    "reactflow": "^11.11.4",
     "rehype-katex": "^7.0.1",
     "remark-gfm": "^4.0.0",
     "remark-math": "^6.0.0",
-    "tailwind-merge": "^3.3.1"
+    "tailwind-merge": "^3.4.0"
   },
   "devDependencies": {
     "@tailwindcss/postcss": "^4.1.10",
@@ -66,6 +74,7 @@
     "prettier": "^3.5.3",
     "prettier-plugin-tailwindcss": "^0.7.1",
     "tailwindcss": "^4.1.11",
+    "tw-animate-css": "^1.4.0",
     "typescript": "^5.8.3",
     "vite": "^7.2.0",
     "vite-plugin-svgr": "^4.3.0"