fix: Correct CTR calculation in InsightStats component

The CTR calculation was incorrectly summing up individual CTR values,
resulting in inflated percentages. Now calculates CTR properly by
dividing total clicks by total impressions.

Previous Implementation:
- CTR was calculated by adding up individual CTR percentages
- This resulted in artificially high CTR values
- For example: [10%, 15%, 20%] => 45% (incorrect)

New Implementation:
- CTR is now calculated using (total clicks / total impressions) * 100
- This provides the actual click-through rate across all data
- For example: (50 clicks / 1000 impressions) * 100 = 5% (correct)

This fix ensures accurate CTR reporting in the analytics dashboard.

Changes:
- Removed CTR accumulation from reducer
- Added proper CTR calculation based on total clicks and impressions
- Maintains better statistical accuracy in reporting

components/insight/InsightStats.tsx

@@ -13,16 +13,20 @@ type InsightStatsProps = {
 }
 
 const InsightStats = ({ stats = [], totalKeywords = 0, totalPages = 0 }:InsightStatsProps) => {
-   const totalStat = useMemo(() => {
-      return stats.reduce((acc, item) => {
-         return {
+    const totalStat = useMemo(() => {
+      const totals = stats.reduce((acc, item) => {
+          return {
             impressions: item.impressions + acc.impressions,
             clicks: item.clicks + acc.clicks,
-            ctr: item.ctr + acc.ctr,
             position: item.position + acc.position,
-         };
-      }, { impressions: 0, clicks: 0, ctr: 0, position: 0 });
-   }, [stats]);
+          };
+      }, { impressions: 0, clicks: 0, position: 0 });
+
+      return {
+          ...totals,
+          ctr: totals.impressions > 0 ? (totals.clicks / totals.impressions) * 100 : 0
+      };
+    }, [stats]);
 
    const chartData = useMemo(() => {
       const months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];