Improve shipping pie chart

dashboard/src/components/dashboard/StatCards.jsx

@@ -504,6 +504,66 @@ const ShippingDetails = ({ data }) => {
   const locations = data[0]?.shipping?.locations || {};
   const methodStats = data[0]?.shipping?.methodStats || [];
 
+  // Custom colors for the pie chart
+  const COLORS = [
+    'hsl(171.2 77.2% 53.3%)',
+    'hsl(200 95% 50%)',
+    'hsl(280 95% 60%)',
+    'hsl(340 95% 60%)',
+    'hsl(40 95% 50%)',
+    'hsl(120 95% 45%)',
+    'hsl(240 95% 60%)',
+    'hsl(30 95% 50%)',
+  ];
+
+  // Custom label renderer for pie chart
+  const renderCustomizedLabel = ({ cx, cy, midAngle, innerRadius, outerRadius, percent, index, name }) => {
+    const RADIAN = Math.PI / 180;
+    // Extend the radius for label placement
+    const radius = outerRadius * 1.2;
+    
+    // Calculate position
+    const x = cx + radius * Math.cos(-midAngle * RADIAN);
+    const y = cy + radius * Math.sin(-midAngle * RADIAN);
+
+    // Only show label if percentage is greater than 3%
+    if (percent < 0.03) return null;
+
+    return (
+      <text
+        x={x}
+        y={y}
+        fill="currentColor"
+        textAnchor={x > cx ? 'start' : 'end'}
+        dominantBaseline="central"
+        className="text-xs font-medium"
+      >
+        {name} ({(percent * 100).toFixed(1)}%)
+      </text>
+    );
+  };
+
+  // Custom legend renderer
+  const renderLegend = (props) => {
+    const { payload } = props;
+    
+    return (
+      <div className="flex flex-wrap gap-4 justify-center mt-4">
+        {payload.map((entry, index) => (
+          <div key={`legend-${index}`} className="flex items-center gap-2">
+            <div
+              className="w-3 h-3 rounded-full"
+              style={{ backgroundColor: entry.color }}
+            />
+            <span className="text-sm">
+              {entry.value}: {((entry.payload.value / shippedCount) * 100).toFixed(1)}%
+            </span>
+          </div>
+        ))}
+      </div>
+    );
+  };
+
   return (
     <div className="space-y-8">
       <div className="grid grid-cols-2 gap-4">
@@ -533,15 +593,15 @@ const ShippingDetails = ({ data }) => {
                 dataKey="value"
                 nameKey="name"
                 cx="50%"
-                cy="50%"
-                outerRadius={150}
-                fill="hsl(171.2 77.2% 53.3%)"
-                label={({ name, percent }) => `${name} (${(percent * 100).toFixed(1)}%)`}
+                cy="45%"
+                outerRadius={120}
+                labelLine={false}
+                label={renderCustomizedLabel}
               >
                 {methodStats.map((entry, index) => (
                   <Cell
                     key={`cell-${index}`}
-                    fill={`hsl(171.2 77.2% ${53.3 - (index * 10)}%)`}
+                    fill={COLORS[index % COLORS.length]}
                   />
                 ))}
               </Pie>
@@ -550,6 +610,17 @@ const ShippingDetails = ({ data }) => {
                   `${value.toLocaleString()} orders (${((value / shippedCount) * 100).toFixed(1)}%)`,
                   name
                 ]}
+                contentStyle={{
+                  backgroundColor: 'hsl(var(--background))',
+                  border: '1px solid hsl(var(--border))',
+                  borderRadius: '0.5rem',
+                  padding: '0.5rem'
+                }}
+              />
+              <Legend
+                content={renderLegend}
+                verticalAlign="bottom"
+                align="center"
               />
             </PieChart>
           </ResponsiveContainer>