feat(webui): improve compression graph readability

The y-axis for the compression ratio graph has been adjusted to start at 0.95 and end slightly above the maximum data point. This makes changes in the compression ratio more visible, as suggested in the user feedback.

webui/src/components/StatsPanel.tsx

@@ -113,7 +113,12 @@ const StatsPanel = ({ selector }: { selector: OpSelector }) => {
                 domain={["dataMin", "dataMax"]}
                 tickFormatter={(v) => formatDate(v as number)}
               />
-              <YAxis yAxisId="left" type="number" dataKey="compressionRatio" />
+              <YAxis
+                yAxisId="left"
+                type="number"
+                dataKey="compressionRatio"
+                domain={[0.95, "dataMax + 0.05"]}
+              />
               <Tooltip labelFormatter={(v) => formatDate(v as number)} />
               <Legend />
               <Line