Link dataset column headers to HF dataset pages

Each benchmark column header (BCIC-2a, PhysioNet, ISRUC, etc.) is now
a hyperlink to its braindecode HF dataset page. The existing hover
tooltip with dataset details is preserved. The link opens in a new tab
and shows an underline on hover.

frontend/src/pages/LeaderboardPage/components/Leaderboard/utils/columnUtils.js

@@ -274,12 +274,24 @@ const RankIndicator = ({ rank, previousRank, mode }) => {
   );
 };
 
+// Hugging Face dataset URLs for each benchmark
+const DATASET_URLS = {
+  bcic2a: "https://huggingface.co/datasets/braindecode/bcic-iv-2a",
+  physionet: "https://huggingface.co/datasets/braindecode/physionet-mi",
+  isruc_sleep: "https://huggingface.co/datasets/braindecode/isruc-sleep",
+  tuab: "https://huggingface.co/datasets/braindecode/tuab",
+  tuev: "https://huggingface.co/datasets/braindecode/tuev",
+  chbmit: "https://huggingface.co/datasets/braindecode/chb-mit",
+  faced: "https://huggingface.co/datasets/braindecode/faced",
+  seedv: "https://huggingface.co/datasets/braindecode/seed-v",
+};
+
 const getDetailsUrl = (modelName) => {
   const formattedName = modelName.replace("/", "__");
   return `https://huggingface.co/datasets/braindecode/${formattedName}-details`;
 };
 
-const HeaderLabel = ({ label, tooltip, className, isSorted }) => (
+const HeaderLabel = ({ label, tooltip, className, isSorted, href }) => (
   <Tooltip
     title={label}
     arrow
@@ -289,12 +301,28 @@ const HeaderLabel = ({ label, tooltip, className, isSorted }) => (
   >
     <Typography
       className={className}
+      {...(href
+        ? {
+            component: "a",
+            href,
+            target: "_blank",
+            rel: "noopener noreferrer",
+          }
+        : {})}
       sx={{
         fontWeight: 600,
         color: isSorted ? "primary.main" : "grey.700",
         flex: 1,
         transition: "max-width 0.2s ease",
         maxWidth: "100%",
+        textDecoration: "none",
+        ...(href
+          ? {
+              "&:hover": {
+                textDecoration: "underline",
+              },
+            }
+          : {}),
         ...(label === "Rank" || label === "Type"
           ? {
               overflow: "visible",
@@ -333,7 +361,7 @@ const InfoIcon = ({ tooltip }) => (
   </Box>
 );
 
-const createHeaderCell = (label, tooltip) => (header) =>
+const createHeaderCell = (label, tooltip, href) => (header) =>
   (
     <Box
       className="header-content"
@@ -349,6 +377,7 @@ const createHeaderCell = (label, tooltip) => (header) =>
         tooltip={tooltip}
         className="header-label"
         isSorted={header?.column?.getIsSorted()}
+        href={href}
       />
 
       <Box
@@ -751,7 +780,7 @@ export const createColumns = (
   const evaluationColumns = [
     {
       accessorKey: "evaluations.bcic2a.normalized_score",
-      header: createHeaderCell("BCIC-2a", COLUMN_TOOLTIPS.BCIC2A),
+      header: createHeaderCell("BCIC-2a", COLUMN_TOOLTIPS.BCIC2A, DATASET_URLS.bcic2a),
       cell: ({ row, getValue }) =>
         createScoreCell(getValue, row, "evaluations.bcic2a.normalized_score"),
       size: TABLE_DEFAULTS.COLUMNS.COLUMN_SIZES[
@@ -760,7 +789,7 @@ export const createColumns = (
     },
     {
       accessorKey: "evaluations.physionet.normalized_score",
-      header: createHeaderCell("PhysioNet", COLUMN_TOOLTIPS.PHYSIONET),
+      header: createHeaderCell("PhysioNet", COLUMN_TOOLTIPS.PHYSIONET, DATASET_URLS.physionet),
       cell: ({ row, getValue }) =>
         createScoreCell(getValue, row, "evaluations.physionet.normalized_score"),
       size: TABLE_DEFAULTS.COLUMNS.COLUMN_SIZES[
@@ -769,7 +798,7 @@ export const createColumns = (
     },
     {
       accessorKey: "evaluations.isruc_sleep.normalized_score",
-      header: createHeaderCell("ISRUC", COLUMN_TOOLTIPS.ISRUC_SLEEP),
+      header: createHeaderCell("ISRUC", COLUMN_TOOLTIPS.ISRUC_SLEEP, DATASET_URLS.isruc_sleep),
       cell: ({ row, getValue }) =>
         createScoreCell(getValue, row, "evaluations.isruc_sleep.normalized_score"),
       size: TABLE_DEFAULTS.COLUMNS.COLUMN_SIZES[
@@ -778,7 +807,7 @@ export const createColumns = (
     },
     {
       accessorKey: "evaluations.tuab.normalized_score",
-      header: createHeaderCell("TUAB", COLUMN_TOOLTIPS.TUAB),
+      header: createHeaderCell("TUAB", COLUMN_TOOLTIPS.TUAB, DATASET_URLS.tuab),
       cell: ({ row, getValue }) =>
         createScoreCell(getValue, row, "evaluations.tuab.normalized_score"),
       size: TABLE_DEFAULTS.COLUMNS.COLUMN_SIZES[
@@ -787,7 +816,7 @@ export const createColumns = (
     },
     {
       accessorKey: "evaluations.tuev.normalized_score",
-      header: createHeaderCell("TUEV", COLUMN_TOOLTIPS.TUEV),
+      header: createHeaderCell("TUEV", COLUMN_TOOLTIPS.TUEV, DATASET_URLS.tuev),
       cell: ({ row, getValue }) =>
         createScoreCell(getValue, row, "evaluations.tuev.normalized_score"),
       size: TABLE_DEFAULTS.COLUMNS.COLUMN_SIZES[
@@ -796,7 +825,7 @@ export const createColumns = (
     },
     {
       accessorKey: "evaluations.chbmit.normalized_score",
-      header: createHeaderCell("CHB-MIT", COLUMN_TOOLTIPS.CHBMIT),
+      header: createHeaderCell("CHB-MIT", COLUMN_TOOLTIPS.CHBMIT, DATASET_URLS.chbmit),
       cell: ({ row, getValue }) =>
         createScoreCell(getValue, row, "evaluations.chbmit.normalized_score"),
       size: TABLE_DEFAULTS.COLUMNS.COLUMN_SIZES[
@@ -805,7 +834,7 @@ export const createColumns = (
     },
     {
       accessorKey: "evaluations.faced.normalized_score",
-      header: createHeaderCell("FACED", COLUMN_TOOLTIPS.FACED),
+      header: createHeaderCell("FACED", COLUMN_TOOLTIPS.FACED, DATASET_URLS.faced),
       cell: ({ row, getValue }) =>
         createScoreCell(getValue, row, "evaluations.faced.normalized_score"),
       size: TABLE_DEFAULTS.COLUMNS.COLUMN_SIZES[
@@ -814,7 +843,7 @@ export const createColumns = (
     },
     {
       accessorKey: "evaluations.seedv.normalized_score",
-      header: createHeaderCell("SEED-V", COLUMN_TOOLTIPS.SEEDV),
+      header: createHeaderCell("SEED-V", COLUMN_TOOLTIPS.SEEDV, DATASET_URLS.seedv),
       cell: ({ row, getValue }) =>
         createScoreCell(getValue, row, "evaluations.seedv.normalized_score"),
       size: TABLE_DEFAULTS.COLUMNS.COLUMN_SIZES[