feat(api): Implement create conversation endpoint

src/ea_chatbot/api/routers/history.py

@@ -2,10 +2,31 @@ from fastapi import APIRouter, Depends, HTTPException, status, Response
 from typing import List, Optional
 from ea_chatbot.api.dependencies import get_current_user, history_manager, settings
 from ea_chatbot.history.models import User as UserDB
-from ea_chatbot.api.schemas import ConversationResponse, MessageResponse, ConversationUpdate
+from ea_chatbot.api.schemas import ConversationResponse, MessageResponse, ConversationUpdate, ConversationCreate
 
 router = APIRouter(prefix="/conversations", tags=["history"])
 
+@router.post("", response_model=ConversationResponse, status_code=status.HTTP_201_CREATED)
+async def create_conversation(
+    conv_in: ConversationCreate,
+    current_user: UserDB = Depends(get_current_user)
+):
+    """Create a new conversation."""
+    state = conv_in.data_state or settings.data_state
+    conv = history_manager.create_conversation(
+        user_id=current_user.id,
+        data_state=state,
+        name=conv_in.name,
+        summary=conv_in.summary
+    )
+    return {
+        "id": str(conv.id),
+        "name": conv.name,
+        "summary": conv.summary,
+        "created_at": conv.created_at,
+        "data_state": conv.data_state
+    }
+
 @router.get("", response_model=List[ConversationResponse])
 async def list_conversations(
     current_user: UserDB = Depends(get_current_user),

src/ea_chatbot/api/schemas.py

@@ -27,6 +27,11 @@ class ConversationResponse(BaseModel):
     created_at: datetime
     data_state: str
 
+class ConversationCreate(BaseModel):
+    name: str
+    data_state: Optional[str] = None
+    summary: Optional[str] = None
+
 class MessageResponse(BaseModel):
     id: str
     role: str

tests/api/test_api_history.py

@@ -41,6 +41,27 @@ def test_get_conversations_success(auth_header, mock_user):
         assert len(response.json()) == 1
         assert response.json()[0]["name"] == "Conv 1"
 
+def test_create_conversation_success(auth_header, mock_user):
+    """Test creating a new conversation."""
+    with patch("ea_chatbot.api.routers.history.history_manager") as mock_hm:
+        mock_hm.create_conversation.return_value = Conversation(
+            id="c2",
+            name="New Conv",
+            user_id=mock_user.id,
+            data_state="nj",
+            created_at=datetime.now(timezone.utc)
+        )
+        
+        response = client.post(
+            "/conversations",
+            json={"name": "New Conv"},
+            headers=auth_header
+        )
+        
+        assert response.status_code == 201
+        assert response.json()["name"] == "New Conv"
+        assert response.json()["id"] == "c2"
+
 def test_get_messages_success(auth_header):
     """Test retrieving messages for a conversation."""
     with patch("ea_chatbot.api.routers.history.history_manager") as mock_hm: