fix: Fix module imports and paths for HF Spaces

Dockerfile

@@ -14,12 +14,10 @@ COPY backend/requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
 COPY backend/ ./backend/
-COPY frontend/ ./frontend/
-
-RUN cd frontend && npm install && npm run build
+COPY frontend/dist ./frontend/dist
 
 RUN mkdir -p /app/storage/uploads /app/storage/vector_db
 
 EXPOSE 7860
 
-CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]
+CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "7860"]

backend/app/api/__init__.py

@@ -1,3 +1,3 @@
-from app.api.v1 import api_router
+from backend.app.api.v1 import api_router
 
 __all__ = ["api_router"]

backend/app/api/v1/__init__.py

@@ -1,5 +1,5 @@
 from fastapi import APIRouter
-from app.api.v1.routes import router
+from backend.app.api.v1.routes import router
 
 api_router = APIRouter()
 api_router.include_router(router, prefix="/v1")

backend/app/api/v1/routes/documents.py

@@ -1,6 +1,6 @@
 from fastapi import APIRouter
-from app.models.schemas import DocumentListResponse, Document
-from app.services.vector_store import vector_store
+from backend.app.models.schemas import DocumentListResponse, Document
+from backend.app.services.vector_store import vector_store
 from pathlib import Path
 from datetime import datetime
 import json

backend/app/api/v1/routes/health.py

@@ -1,5 +1,5 @@
 from fastapi import APIRouter
-from app.models.schemas import HealthResponse
+from backend.app.models.schemas import HealthResponse
 
 router = APIRouter(prefix="/health", tags=["health"])
 

backend/app/api/v1/routes/query.py

@@ -1,9 +1,9 @@
 from fastapi import APIRouter, HTTPException
-from app.models.schemas import QueryRequest, QueryResponse
-from app.services.retriever import retriever_service
-from app.services.enhanced_llm import enhanced_llm_service
-from app.services.prompt_guard import prompt_guard
-from app.services.confidence import confidence_service
+from backend.app.models.schemas import QueryRequest, QueryResponse
+from backend.app.services.retriever import retriever_service
+from backend.app.services.enhanced_llm import enhanced_llm_service
+from backend.app.services.prompt_guard import prompt_guard
+from backend.app.services.confidence import confidence_service
 from datetime import datetime
 import time
 

backend/app/api/v1/routes/upload.py

@@ -1,8 +1,8 @@
 from fastapi import APIRouter, UploadFile, File, HTTPException
-from app.models.schemas import UploadResponse
-from app.services.pdf_processor import pdf_processor
-from app.services.embeddings import embedding_service
-from app.services.vector_store import vector_store
+from backend.app.models.schemas import UploadResponse
+from backend.app.services.pdf_processor import pdf_processor
+from backend.app.services.embeddings import embedding_service
+from backend.app.services.vector_store import vector_store
 from pathlib import Path
 import uuid
 from datetime import datetime

backend/app/config.py

@@ -3,7 +3,8 @@ from pathlib import Path
 from dotenv import load_dotenv
 from pydantic import BaseModel
 
-load_dotenv()
+env_path = Path(__file__).parent.parent / ".env"
+load_dotenv(dotenv_path=str(env_path))
 
 
 class Settings(BaseModel):
@@ -39,6 +40,7 @@ class Settings(BaseModel):
     CORS_ORIGINS: list = [
         "http://localhost:3000",
         "http://localhost:5173",
+        "http://localhost:5175",
         "https://yuvis-web-based-rag.hf.space",
         "https://*.hf.space",
     ]

backend/app/main.py

@@ -2,13 +2,13 @@ from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.staticfiles import StaticFiles
 from fastapi.responses import FileResponse
-from app.api.v1.routes import router as api_router
-from app.config import settings
+from backend.app.api.v1.routes import router as api_router
+from backend.app.config import settings
 import os
 
 app = FastAPI(
     title="RAG System API",
-    description="Production-grade RAG system with PDF and web search",
+    description="Production-grade RAG system with PDF document processing and web search",
     version="1.0.0",
     docs_url="/api/docs",
     redoc_url="/api/redoc",
@@ -25,14 +25,12 @@ app.add_middleware(
 app.include_router(api_router, prefix="/api/v1")
 
 # Serve static files (React frontend)
-frontend_path = "/app"
+frontend_path = os.path.join(os.path.dirname(__file__), "../../frontend/dist")
 try:
-    app.mount("/", StaticFiles(directory=frontend_path, html=True), name="static")
-except RuntimeError:
-    # Fallback path if /app doesn't exist
-    fallback_path = os.path.join(os.path.dirname(__file__), "../../frontend/dist")
-    if os.path.exists(fallback_path):
-        app.mount("/", StaticFiles(directory=fallback_path, html=True), name="static")
+    if os.path.exists(frontend_path):
+        app.mount("/", StaticFiles(directory=frontend_path, html=True), name="static")
+except Exception:
+    pass
 
 
 @app.get("/")
@@ -40,10 +38,6 @@ async def serve_index():
     index_path = os.path.join(frontend_path, "index.html")
     if os.path.exists(index_path):
         return FileResponse(index_path)
-    # Also try fallback path
-    fallback_path = os.path.join(os.path.dirname(__file__), "../../frontend/dist/index.html")
-    if os.path.exists(fallback_path):
-        return FileResponse(fallback_path)
     return {"message": "RAG System API", "version": "1.0.0"}
 
 

backend/app/services/confidence.py

@@ -1,6 +1,6 @@
 from typing import List
-from app.models.schemas import Source
-from app.services.embeddings import embedding_service
+from backend.app.models.schemas import Source
+from backend.app.services.embeddings import embedding_service
 
 
 class ConfidenceService:

backend/app/services/embeddings.py

@@ -1,7 +1,7 @@
 from sentence_transformers import SentenceTransformer
 from typing import List
 import numpy as np
-from app.config import settings
+from backend.app.config import settings
 
 
 class EmbeddingService:

backend/app/services/enhanced_llm.py

@@ -16,8 +16,8 @@ from datetime import datetime
 from dataclasses import dataclass
 from enum import Enum
 
-from app.models.schemas import Source
-from app.config import settings
+from backend.app.models.schemas import Source
+from backend.app.config import settings
 
 
 class ModelType(Enum):

backend/app/services/llm_service.py

@@ -2,8 +2,8 @@ import aiohttp
 import asyncio
 import time
 from typing import List
-from app.models.schemas import Source
-from app.config import settings
+from backend.app.models.schemas import Source
+from backend.app.config import settings
 
 
 class LLMService:

backend/app/services/pdf_processor.py

@@ -2,7 +2,7 @@ import pypdf
 import pdfplumber
 from pathlib import Path
 from typing import List, Tuple
-from app.utils.chunking import intelligent_chunk, create_chunk_metadata
+from backend.app.utils.chunking import intelligent_chunk, create_chunk_metadata
 
 
 class PDFProcessor:

backend/app/services/retriever.py

@@ -1,8 +1,8 @@
 from typing import List, Dict, Optional
-from app.services.embeddings import embedding_service
-from app.services.vector_store import vector_store
-from app.services.web_search import web_search_service
-from app.models.schemas import Source, SourceType, QueryMode
+from backend.app.services.embeddings import embedding_service
+from backend.app.services.vector_store import vector_store
+from backend.app.services.web_search import web_search_service
+from backend.app.models.schemas import Source, SourceType, QueryMode
 
 
 class RetrieverService:

backend/app/services/vector_store.py

@@ -2,7 +2,7 @@ import chromadb
 from chromadb.config import Settings as ChromaSettings
 from typing import List, Dict, Optional
 from pathlib import Path
-from app.config import settings
+from backend.app.config import settings
 
 
 class VectorStore:

backend/app/services/web_search.py

@@ -16,7 +16,7 @@ from dataclasses import dataclass
 from enum import Enum
 import json
 
-from app.config import settings
+from backend.app.config import settings
 
 
 class SearchProvider(Enum):