chore(mining-admin-web): change decimal display precision from 8 to 7

Updated all price and decimal displays to use 7 decimal places:
- Dashboard stats cards
- Price overview
- Mining records list
- Trade orders list
- Reports page
- formatPrice utility function

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/mining-admin-web/src/app/(dashboard)/reports/page.tsx

@@ -125,7 +125,7 @@ export default function ReportsPage() {
                     </TableCell>
                     <TableCell className="text-right font-mono">{formatDecimal(report.dailyDistributed, 2)}</TableCell>
                     <TableCell className="text-right font-mono">{formatDecimal(report.dailyBurned, 2)}</TableCell>
-                    <TableCell className="text-right font-mono">{formatDecimal(report.closePrice, 8)}</TableCell>
+                    <TableCell className="text-right font-mono">{formatDecimal(report.closePrice, 7)}</TableCell>
                     <TableCell className="text-right font-mono">{formatCompactNumber(report.dailyVolume)}</TableCell>
                   </TableRow>
                 ))

frontend/mining-admin-web/src/features/dashboard/components/price-overview.tsx

@@ -21,7 +21,7 @@ export function PriceOverview() {
           <div className="space-y-2">
             <p className="text-sm text-muted-foreground">当前价格</p>
             <div className="flex items-baseline gap-2">
-              <span className="text-3xl font-bold">{formatDecimal(stats?.currentPrice, 8)}</span>
+              <span className="text-3xl font-bold">{formatDecimal(stats?.currentPrice, 7)}</span>
               <span className="text-sm text-muted-foreground">绿积分/股</span>
             </div>
             <div className={`flex items-center gap-1 text-sm ${isPriceUp ? 'text-green-500' : 'text-red-500'}`}>

frontend/mining-admin-web/src/features/dashboard/components/stats-cards.tsx

@@ -38,7 +38,7 @@ export function StatsCards() {
   const cards = [
     {
       title: '当前价格',
-      value: formatDecimal(stats?.currentPrice, 8),
+      value: formatDecimal(stats?.currentPrice, 7),
       unit: '绿积分/股',
       icon: isPriceUp ? TrendingUp : TrendingDown,
       iconColor: isPriceUp ? 'text-green-500' : 'text-red-500',

frontend/mining-admin-web/src/features/users/components/mining-records-list.tsx

@@ -58,7 +58,7 @@ export function MiningRecordsList({ accountSequence }: MiningRecordsListProps) {
                   <TableCell className="text-right font-mono text-primary">
                     +{formatDecimal(record.shareAmount, 4)}
                   </TableCell>
-                  <TableCell className="text-right font-mono">{formatDecimal(record.priceSnapshot, 8)}</TableCell>
+                  <TableCell className="text-right font-mono">{formatDecimal(record.priceSnapshot, 7)}</TableCell>
                   <TableCell className="text-sm">{formatDateTime(record.createdAt)}</TableCell>
                 </TableRow>
               ))

frontend/mining-admin-web/src/features/users/components/trade-orders-list.tsx

@@ -79,7 +79,7 @@ export function TradeOrdersList({ accountSequence }: TradeOrdersListProps) {
                         {status.label}
                       </span>
                     </TableCell>
-                    <TableCell className="text-right font-mono">{formatDecimal(order.price, 8)}</TableCell>
+                    <TableCell className="text-right font-mono">{formatDecimal(order.price, 7)}</TableCell>
                     <TableCell className="text-right font-mono">{formatDecimal(order.quantity, 4)}</TableCell>
                     <TableCell className="text-right font-mono">{formatDecimal(order.filledQuantity, 4)}</TableCell>
                     <TableCell className="text-sm">{formatDateTime(order.createdAt)}</TableCell>

frontend/mining-admin-web/src/lib/utils/format.ts

@@ -40,7 +40,7 @@ export function formatCompactNumber(value: number | string | undefined | null):
 }
 
 export function formatPrice(value: string | number | undefined | null): string {
-  return formatDecimal(value, 8);
+  return formatDecimal(value, 7);
 }
 
 export function formatShareAmount(value: string | number | undefined | null): string {