feature: add col resize to secret dashboard env view

frontend/src/hooks/useResizableColWidth.tsx

@@ -0,0 +1,71 @@
+import { MouseEvent, useCallback, useEffect, useRef, useState } from "react";
+
+type Params = {
+  minWidth: number;
+  maxWidth: number;
+  initialWidth: number;
+};
+
+export const useResizableColWidth = ({ minWidth, maxWidth, initialWidth }: Params) => {
+  const [colWidth, setColWidth] = useState(initialWidth);
+  const [isResizing, setIsResizing] = useState(false);
+  const startX = useRef(0);
+  const startWidth = useRef(0);
+
+  const handleMouseDown = useCallback(
+    (e: MouseEvent<HTMLDivElement>) => {
+      e.preventDefault();
+      e.stopPropagation();
+      setIsResizing(true);
+      startX.current = e.clientX;
+      startWidth.current = colWidth;
+    },
+    [colWidth]
+  );
+
+  const handleMouseMove = useCallback(
+    (e: MouseEvent) => {
+      if (!isResizing) return;
+
+      const deltaX = e.clientX - startX.current;
+      const newWidth = Math.max(minWidth, Math.min(maxWidth, startWidth.current + deltaX));
+
+      setColWidth(newWidth);
+    },
+    [isResizing]
+  );
+
+  const handleMouseUp = useCallback(() => {
+    setIsResizing(false);
+  }, []);
+
+  useEffect(() => {
+    if (isResizing) {
+      document.addEventListener(
+        "mousemove",
+        // @ts-expect-error native discrepancy
+        handleMouseMove
+      );
+      document.addEventListener("mouseup", handleMouseUp);
+      document.body.style.cursor = "ew-resize";
+      document.body.style.userSelect = "none";
+    }
+
+    return () => {
+      document.removeEventListener(
+        "mousemove",
+        // @ts-expect-error native discrepancy
+        handleMouseMove
+      );
+      document.removeEventListener("mouseup", handleMouseUp);
+      document.body.style.cursor = "";
+      document.body.style.userSelect = "";
+    };
+  }, [isResizing, handleMouseMove, handleMouseUp]);
+
+  return {
+    colWidth,
+    handleMouseDown,
+    isResizing
+  };
+};