Dependabot fixes

[luarss]

No description provided.

[Copilot]

Pull Request Overview

This PR replaces the existing Flask mock endpoint with FastAPI and Pydantic models, updates dependencies accordingly, and bumps some front-end packages.

• Migrate mock_endpoint.py from Flask to FastAPI with typed request/response models
• Update requirements.txt to remove Flask and add FastAPI
• Bump Next.js version and introduce new front-end dependencies in package.json

Reviewed Changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.

File	Description
frontend/utils/mock_endpoint.py	Replaced Flask routes with FastAPI, added Pydantic models, integrated uvicorn.run
frontend/requirements.txt	Removed Flask/CORS deps, added fastapi entry
frontend/nextjs-frontend/package.json	Updated Next.js version and added @babel/runtime & prismjs

Comments suppressed due to low confidence (3)

frontend/utils/mock_endpoint.py:37

• [nitpick] The parameter name request conflicts with FastAPI's Request type and may cause confusion; consider renaming it to something like chat_request or payload.

def chat_app(request: ChatRequest) -> ChatResponse:

frontend/utils/mock_endpoint.py:25

• Consider adding automated tests for the new FastAPI endpoints (/chains/listAll and /graphs/agent-retriever) to validate request parsing and response formatting.

@app.get("/chains/listAll")

frontend/utils/mock_endpoint.py:74

• The module uses uvicorn.run(...) but uvicorn is not listed in requirements.txt. Please add uvicorn to ensure the server can start without missing dependency errors.

    import uvicorn