fix: correct API prefix for conversation tracker endpoints

dashboard/backend/main.py

@@ -299,6 +299,7 @@ app.include_router(
 )
 app.include_router(
     conversation_tracker.router,
+    prefix="/api/conversations",
     dependencies=[Depends(_inject_user), Depends(require_page("conversations"))],
 )
 app.include_router(

dashboard/backend/routers/conversation_tracker.py

@@ -3,7 +3,7 @@ import aiosqlite
 from fastapi import APIRouter, HTTPException, Query
 from typing import Optional
 
-router = APIRouter(prefix="/api/conversations", tags=["conversations"])
+router = APIRouter(tags=["conversations"])
 
 CONVERSATION_TRACKER_DB = os.environ.get("CONVERSATION_TRACKER_DB", "/app/data/claude-code-tracker/conversations.db")