Fix latency text overlapping sparkline in host row grid

Use minmax(0,1fr) for the name column so it can shrink below its
min-content width, and add overflow-hidden on the grid container
to clip any overflow at the boundary.

src/main.js

@@ -553,7 +553,7 @@ function hostRowHTML(host, index, showPin = true) {
     <div class="host-row bg-gray-800/50 rounded-lg p-2 border border-gray-700/50" data-index="${index}">
       <div class="flex items-center gap-4 min-w-0">
         ${pinBtn}
-        <div class="w-[480px] flex-shrink min-w-0 grid grid-cols-[1fr_auto] items-baseline">
+        <div class="w-[480px] flex-shrink min-w-0 overflow-hidden grid grid-cols-[minmax(0,1fr)_auto] items-baseline">
           <div class="flex items-center gap-2 min-w-0">
             <div class="w-3 h-3 rounded-full flex-shrink-0" style="background-color: ${latencyHex(null)}"></div>
             <span class="font-medium text-white truncate">${host.name}</span>