fix: wrap per-host status line so 320px viewport does not scroll (closes #42)

TODO.md

@@ -22,6 +22,8 @@ files, so merging it also closes most compliance gaps.
 
 # Completed Steps
 
+- 2026-08-10: per-host status line wraps below the 768px breakpoint instead of
+  forcing horizontal page scroll at 320px
 - 2026-08-09: `Dockerfile.backend` reworked to the mandated Go multistage
   lint-stage pattern: separate `lint` stage on the hash-pinned
   `golangci/golangci-lint` image, `COPY --from=lint` stage dependency,

src/main.js

@@ -537,6 +537,12 @@ class SparklineRenderer {
 
 // --- UI Renderer -------------------------------------------------------------
 
+// The per-host status line must stay wrappable: its populated content is
+// wider than the host column at a 320px viewport, and `whitespace-nowrap`
+// here overflows the element and forces the whole document to scroll
+// horizontally.
+const STATUS_TEXT_CLASS = "status-text text-xs text-right col-span-2 mt-5";
+
 function hostRowHTML(host, index, showPin = true) {
     const pinColor = host.pinned
         ? "text-blue-500"
@@ -562,7 +568,7 @@ function hostRowHTML(host, index, showPin = true) {
             <span class="text-gray-500">---</span>
           </div>
           <a href="${host.url}" target="_blank" rel="noopener" class="text-xs text-gray-500 truncate block col-span-2 -mt-2">${host.url}</a>
-          <div class="status-text text-xs text-gray-500 whitespace-nowrap text-right col-span-2 mt-5" data-host="${index}">waiting...</div>
+          <div class="${STATUS_TEXT_CLASS} text-gray-500" data-host="${index}">waiting...</div>
         </div>
         <div class="flex-grow sparkline-container rounded overflow-hidden border border-gray-700/30">
           <canvas class="sparkline-canvas w-full" data-host="${index}" height="${CONFIG.canvasHeight}"></canvas>
@@ -688,6 +694,26 @@ function buildUI(state) {
 
 // --- UI Updaters -------------------------------------------------------------
 
+// Renders `min 1ms / med 2ms / avg 3ms / max 4ms`. Each label, value and
+// trailing separator is one unbreakable unit, so wrapping only ever happens
+// between stats and a wrapped line never starts with a separator.
+function statusStatsHTML(stats) {
+    return stats
+        .map(([label, value], i) => {
+            const sep =
+                i < stats.length - 1
+                    ? ` <span class="text-gray-500">/</span>`
+                    : "";
+            return (
+                `<span class="whitespace-nowrap">` +
+                `<span class="text-gray-400">${label} </span>` +
+                `<span class="${latencyClass(value, "online")}">${value}ms</span>` +
+                `${sep}</span>`
+            );
+        })
+        .join(" ");
+}
+
 function updateHostRow(host, index) {
     const latencyEl = document.querySelector(
         `.latency-value[data-host="${index}"]`,
@@ -712,28 +738,22 @@ function updateHostRow(host, index) {
     const min = host.minLatency();
     const max = host.maxLatency();
     if (host.status === "online" && avg !== null) {
-        statusEl.innerHTML =
-            `<span class="text-gray-400">min </span><span class="${latencyClass(min, "online")}">${min}ms</span>` +
-            ` <span class="text-gray-500">/</span> ` +
-            `<span class="text-gray-400">med </span><span class="${latencyClass(med, "online")}">${med}ms</span>` +
-            ` <span class="text-gray-500">/</span> ` +
-            `<span class="text-gray-400">avg </span><span class="${latencyClass(avg, "online")}">${avg}ms</span>` +
-            ` <span class="text-gray-500">/</span> ` +
-            `<span class="text-gray-400">max </span><span class="${latencyClass(max, "online")}">${max}ms</span>`;
-        statusEl.className =
-            "status-text text-xs whitespace-nowrap text-right col-span-2 mt-5";
+        statusEl.innerHTML = statusStatsHTML([
+            ["min", min],
+            ["med", med],
+            ["avg", avg],
+            ["max", max],
+        ]);
+        statusEl.className = STATUS_TEXT_CLASS;
     } else if (host.status === "offline") {
         statusEl.textContent = "unreachable";
-        statusEl.className =
-            "status-text text-xs text-red-400 whitespace-nowrap text-right col-span-2 mt-5";
+        statusEl.className = `${STATUS_TEXT_CLASS} text-red-400`;
     } else if (host.status === "error") {
         statusEl.textContent = "timeout";
-        statusEl.className =
-            "status-text text-xs text-orange-400 whitespace-nowrap text-right col-span-2 mt-5";
+        statusEl.className = `${STATUS_TEXT_CLASS} text-orange-400`;
     } else {
         statusEl.textContent = "connecting...";
-        statusEl.className =
-            "status-text text-xs text-gray-500 whitespace-nowrap text-right col-span-2 mt-5";
+        statusEl.className = `${STATUS_TEXT_CLASS} text-gray-500`;
     }
 
     SparklineRenderer.draw(canvas, host.history);
@@ -1044,8 +1064,7 @@ function greyOutUI(state) {
         }
         if (statusEl) {
             statusEl.textContent = "paused";
-            statusEl.className =
-                "status-text text-xs text-gray-500 whitespace-nowrap text-right col-span-2 mt-5";
+            statusEl.className = `${STATUS_TEXT_CLASS} text-gray-500`;
         }
         // Grey out the status dot
         const row = document.querySelector(`.host-row[data-index="${i}"]`);