fix: 移除授权价格输入框货币格式

- 移除NumberField的format-options避免显示货币单位
- 在输入框后添加¥单位标签

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/pages/admin/agent-apps/[id].vue

@@ -247,10 +247,11 @@ onMounted(() => {
 
               <div class="space-y-2">
                 <UiLabel>{{ t('admin.agentApps.createForm.price') }} <span class="text-destructive">*</span></UiLabel>
+                <div class="flex items-center gap-2">
                   <NumberField
                     v-model="formData.price"
                     :min="0"
-                  :format-options="{ style: 'currency', currency: 'CNY', currencyDisplay: 'symbol' }"
+                    :step="0.01"
                     :disabled="saving"
                     class="w-32"
                   >
@@ -260,6 +261,8 @@ onMounted(() => {
                       <NumberFieldIncrement />
                     </NumberFieldContent>
                   </NumberField>
+                  <span class="text-sm text-muted-foreground">¥</span>
+                </div>
               </div>
             </UiCardContent>
           </UiCard>

frontend/src/pages/admin/agent-apps/create.vue

@@ -237,10 +237,11 @@ onMounted(() => {
 
               <div class="space-y-2">
                 <UiLabel>{{ t('admin.agentApps.createForm.price') }} <span class="text-destructive">*</span></UiLabel>
+                <div class="flex items-center gap-2">
                   <NumberField
                     v-model="formData.price"
                     :min="0"
-                  :format-options="{ style: 'currency', currency: 'CNY', currencyDisplay: 'symbol' }"
+                    :step="0.01"
                     :disabled="saving"
                     class="w-32"
                   >
@@ -250,6 +251,8 @@ onMounted(() => {
                       <NumberFieldIncrement />
                     </NumberFieldContent>
                   </NumberField>
+                  <span class="text-sm text-muted-foreground">¥</span>
+                </div>
               </div>
 
               <div class="space-y-2">