feature:add plot panel x,y axis

src/routes/+page.svelte

@@ -398,10 +398,12 @@
     const safeIndex = clamp(index, 0, replayFrames.length - 1);
     const startIndex = Math.max(0, safeIndex - summaryPointsPerSeries + 1);
     const points: number[] = [];
+    const frameIds: number[] = [];
     for (let cursor = startIndex; cursor <= safeIndex; cursor += 1) {
       points.push(replayFrameTotal(replayFrames[cursor]));
+      frameIds.push(cursor + 1);
     }
-    return buildSummary(points);
+    return buildSummary(points, frameIds);
   }
 
   function applyReplayFrame(index: number): void {
@@ -573,6 +575,7 @@
   function buildEmptySummary(): HudSummary {
     return {
       label: "TOTAL",
+      xValues: [],
       points: [],
       latest: null,
       min: null,
@@ -580,13 +583,19 @@
     };
   }
 
-  function buildSummary(points: number[]): HudSummary {
+  function buildSummary(points: number[], xValues: number[] = []): HudSummary {
     if (points.length === 0) {
       return buildEmptySummary();
     }
 
+    const resolvedXValues = points.map((_, index) => {
+      const x = xValues[index];
+      return Number.isFinite(x) ? Number(x) : index + 1;
+    });
+
     return {
       label: "TOTAL",
+      xValues: resolvedXValues,
       points,
       latest: points[points.length - 1],
       min: Math.min(...points),
@@ -611,13 +620,20 @@
       ? summaryValue.points[summaryValue.points.length - 1]
       : randomBetween(280, 1600);
     const next = Math.round(clamp(previous + randomBetween(-160, 160), 120, 2400) * 10) / 10;
+    const previousXValues =
+      summaryValue.xValues && summaryValue.xValues.length === summaryValue.points.length
+        ? summaryValue.xValues
+        : summaryValue.points.map((_, index) => index + 1);
     const points =
       summaryValue.points.length >= summaryPointsPerSeries
         ? summaryValue.points.slice(1)
         : summaryValue.points.slice();
+    const xValues =
+      previousXValues.length >= summaryPointsPerSeries ? previousXValues.slice(1) : previousXValues.slice();
 
     points.push(next);
-    return buildSummary(points);
+    xValues.push((xValues[xValues.length - 1] ?? 0) + 1);
+    return buildSummary(points, xValues);
   }
 
   function buildInactivePanels(): HudSignalPanel[] {