[Bug] GUI Dataset Type selector includes YOLO but Evaluator only supports COCO — causes silent mismatch

[vinitjain2005]

Description:

In app.py, the sidebar Dataset Type selector offers two options:

st.selectbox(
    "Type",
    ["COCO", "YOLO"],  # line 43
    key="dataset_type",
)

But in tabs/evaluator.py, only COCO is handled:

if dataset_type.lower() == "coco":
    # loads dataset
else:
    st.warning(
        "⚠️ Only COCO datasets are currently supported for evaluation."
    )

The bug: A user selects YOLO from the sidebar Dataset Type dropdown, navigates to the Evaluator tab, and sees a warning saying YOLO is not supported. However the sidebar still shows YOLO as a valid selectable option with no indication it won't work in the Evaluator tab — this is misleading and confusing.

Steps to Reproduce:

1. Open the GUI
2. In the sidebar, select YOLO as Dataset Type
3. Navigate to the Evaluator tab
4. See the warning — YOLO is not supported

Expected Behaviour:
Either YOLO should be supported in the Evaluator tab, or the Dataset Type selector should dynamically disable or hide YOLO when the user is on the Evaluator tab.

Affected Files:

• app.py — line 43
• tabs/evaluator.py — lines 44-48

Assign these task to me @vinitjain2005

[gtfrans2re]

Bravo on raising this issue, @vinitjain2005. I also ran into it and had to manually define the paths instead of letting the utility find them in dataset_viewer.py. I was about to raise it, but I see you did it first. Hope it's assigned to you ASAP, and happy bug hunting!

P.S. If you ever want us two to look into it, please do let me know!