feat(groups): add platform brand colors to rate multipliers modal icon

chore: bump version to 0.1.96.6

backend/cmd/server/VERSION

@@ -1 +1 @@
-0.1.96.5
+0.1.96.6

frontend/src/components/admin/group/GroupRateMultipliersModal.vue

@@ -3,10 +3,12 @@
     <div v-if="group" class="space-y-4">
       <!-- 分组信息 -->
       <div class="flex flex-wrap items-center gap-3 rounded-lg bg-gray-50 px-4 py-2.5 text-sm dark:bg-dark-700">
-        <PlatformIcon :platform="group.platform" size="md" class="text-gray-500 dark:text-gray-400" />
-        <span class="font-medium text-gray-900 dark:text-white">{{ group.name }}</span>
+        <span class="inline-flex items-center gap-1.5" :class="platformColorClass">
+          <PlatformIcon :platform="group.platform" size="sm" />
+          {{ t('admin.groups.platforms.' + group.platform) }}
+        </span>
         <span class="text-gray-400">|</span>
-        <span class="text-gray-600 dark:text-gray-400">{{ t('admin.groups.platforms.' + group.platform) }}</span>
+        <span class="font-medium text-gray-900 dark:text-white">{{ group.name }}</span>
         <span class="text-gray-400">|</span>
         <span class="text-gray-600 dark:text-gray-400">
           {{ t('admin.groups.columns.rateMultiplier') }}: {{ group.rate_multiplier }}x
@@ -277,6 +279,15 @@ const batchFactor = ref<number | null>(null)
 
 let searchTimeout: ReturnType<typeof setTimeout>
 
+const platformColorClass = computed(() => {
+  switch (props.group?.platform) {
+    case 'anthropic': return 'text-orange-700 dark:text-orange-400'
+    case 'openai': return 'text-emerald-700 dark:text-emerald-400'
+    case 'antigravity': return 'text-purple-700 dark:text-purple-400'
+    default: return 'text-blue-700 dark:text-blue-400'
+  }
+})
+
 // 是否显示"最终倍率"预览列
 const showFinalRate = computed(() => {
   return batchFactor.value != null && batchFactor.value > 0 && batchFactor.value !== 1