fix(api): 引入 TextDecoder(gbk) 解决腾讯接口中文乱码，并在前端表单锁定币种联动字段

src/actions/market.ts

@@ -29,7 +29,9 @@ export async function syncAllStockPrices() {
     try {
       const tCode = getTencentSymbol(asset);
       const response = await fetch(`https://qt.gtimg.cn/q=${tCode}`, { cache: 'no-store' });
-      const text = await response.text();
+      const arrayBuffer = await response.arrayBuffer();
+      const decoder = new TextDecoder('gbk');
+      const text = decoder.decode(arrayBuffer);
 
       const match = text.match(/="([^"]+)"/);
       if (match && match[1]) {

src/components/assets/add-asset-dialog.tsx

@@ -174,7 +174,7 @@ export function AddAssetDialog() {
                 <FormItem>
                   <FormLabel>基础币种</FormLabel>
                   <FormControl>
-                    <Input placeholder="例如: USD" {...field} />
+                    <Input placeholder="例如: USD" {...field} disabled className="bg-muted" />
                   </FormControl>
                   <FormMessage />
                 </FormItem>

src/components/transactions/add-transaction-dialog.tsx

@@ -239,7 +239,7 @@ export function AddTransactionDialog({ assets }: AddTransactionDialogProps) {
                 render={({ field }) => (
                   <FormItem>
                     <FormLabel>交易币种</FormLabel>
-                    <Select onValueChange={field.onChange} defaultValue={field.value}>
+                 <Select disabled onValueChange={field.onChange} defaultValue={field.value}>
                       <FormControl>
                         <SelectTrigger>
                           <SelectValue placeholder="选择币种" />