fix：速率修复

src/utils/units.ts

@@ -5,8 +5,8 @@ export const bandwidthUnits: BandwidthUnit[] = ['Kbps', 'Mbps', 'Gbps'];
 
 export const bandwidthFactors: Record<BandwidthUnit, number> = {
   Kbps: 1,
-  Mbps: 1024,
-  Gbps: 1048576
+  Mbps: 1000,
+  Gbps: 1000000
 };
 
 export function convertBandwidth(value: number, fromUnit: BandwidthUnit, toUnit: BandwidthUnit): number {