feat: add import dashboard UI and functionality for CSV and Excel uploads

routes/imports.py

@@ -3,6 +3,9 @@ from __future__ import annotations
 from io import BytesIO
 
 from fastapi import APIRouter, Depends, File, HTTPException, UploadFile, status
+from fastapi import Request
+from fastapi.responses import HTMLResponse
+from fastapi.templating import Jinja2Templates
 
 from dependencies import get_import_ingestion_service, require_roles
 from models import User
@@ -16,10 +19,30 @@ from schemas.imports import (
 from services.importers import ImportIngestionService, UnsupportedImportFormat
 
 router = APIRouter(prefix="/imports", tags=["Imports"])
+templates = Jinja2Templates(directory="templates")
 
 MANAGE_ROLES = ("project_manager", "admin")
 
 
+@router.get(
+    "/ui",
+    response_class=HTMLResponse,
+    include_in_schema=False,
+    name="imports.ui",
+)
+def import_dashboard(
+    request: Request,
+    _: User = Depends(require_roles(*MANAGE_ROLES)),
+) -> HTMLResponse:
+    return templates.TemplateResponse(
+        request,
+        "imports/ui.html",
+        {
+            "title": "Imports",
+        },
+    )
+
+
 async def _read_upload_file(upload: UploadFile) -> BytesIO:
     content = await upload.read()
     if not content: