fix: TieredPricingEditor 缓存价格处理优化

- 缓存价格计算精度从 2 位小数改为 4 位，支持更精细的价格
- 分离 syncToParent 和 getFinalTiers 职责：
  - syncToParent: 只同步用户实际输入的值
  - getFinalTiers: 提交时获取包含自动计算的最终数据
- GlobalModelFormDialog 和 ProviderModelFormDialog 提交时调用 getFinalTiers

frontend/src/features/models/components/GlobalModelFormDialog.vue

@@ -100,7 +100,7 @@
       <!-- 价格配置 -->
       <section class="space-y-3">
         <h4 class="font-medium text-sm">价格配置</h4>
-        <TieredPricingEditor v-model="tieredPricing" :show-cache1h="form.supported_capabilities?.includes('cache_1h')" />
+        <TieredPricingEditor ref="tieredPricingEditorRef" v-model="tieredPricing" :show-cache1h="form.supported_capabilities?.includes('cache_1h')" />
 
         <!-- 按次计费 -->
         <div class="flex items-center gap-3 pt-2 border-t">
@@ -161,6 +161,7 @@ const emit = defineEmits<{
 
 const { success, error: showError } = useToast()
 const submitting = ref(false)
+const tieredPricingEditorRef = ref<InstanceType<typeof TieredPricingEditor> | null>(null)
 
 // 阶梯计费配置（统一使用，固定价格就是单阶梯）
 const tieredPricing = ref<TieredPricingConfig | null>(null)
@@ -275,6 +276,10 @@ async function handleSubmit() {
     return
   }
 
+  // 获取包含自动计算缓存价格的最终数据
+  const finalTiers = tieredPricingEditorRef.value?.getFinalTiers()
+  const finalTieredPricing = finalTiers ? { tiers: finalTiers } : tieredPricing.value
+
   submitting.value = true
   try {
     if (isEditMode.value && props.model) {
@@ -283,7 +288,7 @@ async function handleSubmit() {
         description: form.value.description,
         // 使用 null 而不是 undefined 来显式清空字段
         default_price_per_request: form.value.default_price_per_request ?? null,
-        default_tiered_pricing: tieredPricing.value,
+        default_tiered_pricing: finalTieredPricing,
         default_supports_streaming: form.value.default_supports_streaming,
         default_supports_image_generation: form.value.default_supports_image_generation,
         default_supports_vision: form.value.default_supports_vision,
@@ -300,7 +305,7 @@ async function handleSubmit() {
         display_name: form.value.display_name!,
         description: form.value.description,
         default_price_per_request: form.value.default_price_per_request || undefined,
-        default_tiered_pricing: tieredPricing.value,
+        default_tiered_pricing: finalTieredPricing,
         default_supports_streaming: form.value.default_supports_streaming,
         default_supports_image_generation: form.value.default_supports_image_generation,
         default_supports_vision: form.value.default_supports_vision,

frontend/src/features/models/components/TieredPricingEditor.vue

@@ -287,32 +287,32 @@ function formatTokens(tokens: number): string {
 // 缓存价格自动计算
 function getAutoCacheCreation(index: number): number {
   const inputPrice = localTiers.value[index]?.input_price_per_1m || 0
-  return parseFloat((inputPrice * 1.25).toFixed(2))
+  return parseFloat((inputPrice * 1.25).toFixed(4))
 }
 
 function getAutoCacheRead(index: number): number {
   const inputPrice = localTiers.value[index]?.input_price_per_1m || 0
-  return parseFloat((inputPrice * 0.1).toFixed(2))
+  return parseFloat((inputPrice * 0.1).toFixed(4))
 }
 
 function getAutoCache1h(index: number): number {
   const inputPrice = localTiers.value[index]?.input_price_per_1m || 0
-  return parseFloat((inputPrice * 2).toFixed(2))
+  return parseFloat((inputPrice * 2).toFixed(4))
 }
 
 function getCacheCreationPlaceholder(index: number): string {
   const auto = getAutoCacheCreation(index)
-  return auto > 0 ? auto.toFixed(2) : '自动'
+  return auto > 0 ? String(auto) : '自动'
 }
 
 function getCacheReadPlaceholder(index: number): string {
   const auto = getAutoCacheRead(index)
-  return auto > 0 ? auto.toFixed(2) : '自动'
+  return auto > 0 ? String(auto) : '自动'
 }
 
 function getCache1hPlaceholder(index: number): string {
   const auto = getAutoCache1h(index)
-  return auto > 0 ? auto.toFixed(2) : '自动'
+  return auto > 0 ? String(auto) : '自动'
 }
 
 function getCacheCreationDisplay(index: number): string | number {
@@ -346,7 +346,7 @@ function getCache1hDisplay(index: number): string | number {
   return ''
 }
 
-// 同步到父组件（包含自动计算的缓存价格）
+// 同步到父组件（只同步用户实际输入的值，不自动填充）
 function syncToParent() {
   if (validationError.value) return
 
@@ -357,6 +357,36 @@ function syncToParent() {
       output_price_per_1m: t.output_price_per_1m,
     }
 
+    // 缓存创建价格：只有手动设置才同步
+    if (cacheManuallySet[i]?.creation && t.cache_creation_price_per_1m != null) {
+      tier.cache_creation_price_per_1m = t.cache_creation_price_per_1m
+    }
+
+    // 缓存读取价格：只有手动设置才同步
+    if (cacheManuallySet[i]?.read && t.cache_read_price_per_1m != null) {
+      tier.cache_read_price_per_1m = t.cache_read_price_per_1m
+    }
+
+    // 缓存 TTL 价格（1h 缓存）- 只有启用 1h 缓存能力且手动设置时才处理
+    if (props.showCache1h && cacheManuallySet[i]?.cache1h && t.cache_ttl_pricing?.length) {
+      tier.cache_ttl_pricing = t.cache_ttl_pricing
+    }
+
+    return tier
+  })
+
+  emit('update:modelValue', { tiers })
+}
+
+// 获取最终提交的数据（包含自动计算的缓存价格）
+function getFinalTiers(): PricingTier[] {
+  return localTiers.value.map((t, i) => {
+    const tier: PricingTier = {
+      up_to: t.up_to,
+      input_price_per_1m: t.input_price_per_1m,
+      output_price_per_1m: t.output_price_per_1m,
+    }
+
     // 缓存创建价格：手动设置则用设置值，否则自动计算
     if (cacheManuallySet[i]?.creation && t.cache_creation_price_per_1m != null) {
       tier.cache_creation_price_per_1m = t.cache_creation_price_per_1m
@@ -374,20 +404,21 @@ function syncToParent() {
     // 缓存 TTL 价格（1h 缓存）- 只有启用 1h 缓存能力时才处理
     if (props.showCache1h) {
       if (cacheManuallySet[i]?.cache1h && t.cache_ttl_pricing?.length) {
-        // 手动设置则用设置值
         tier.cache_ttl_pricing = t.cache_ttl_pricing
       } else if (t.input_price_per_1m > 0) {
-        // 否则自动计算
         tier.cache_ttl_pricing = [{ ttl_minutes: 60, cache_creation_price_per_1m: getAutoCache1h(i) }]
       }
     }
 
     return tier
   })
-
-  emit('update:modelValue', { tiers })
 }
 
+// 暴露给父组件调用
+defineExpose({
+  getFinalTiers,
+})
+
 function parseFloatInput(value: string | number): number {
   const num = typeof value === 'string' ? parseFloat(value) : value
   return isNaN(num) ? 0 : num
@@ -515,9 +546,13 @@ function removeTier(index: number) {
   delete cacheManuallySet[index]
 
   // 重新整理 cacheManuallySet 的索引
-  const newManuallySet: Record<number, { creation: boolean; read: boolean }> = {}
+  const newManuallySet: Record<
+    number,
+    { creation: boolean; read: boolean; cache1h: boolean }
+  > = {}
   localTiers.value.forEach((_, i) => {
-    newManuallySet[i] = cacheManuallySet[i] || { creation: false, read: false }
+    newManuallySet[i] =
+      cacheManuallySet[i] || { creation: false, read: false, cache1h: false }
   })
   Object.keys(cacheManuallySet).forEach(k => delete cacheManuallySet[Number(k)])
   Object.assign(cacheManuallySet, newManuallySet)

frontend/src/features/providers/components/ProviderModelFormDialog.vue

@@ -48,7 +48,7 @@
       <!-- 价格配置 -->
       <div class="space-y-4">
         <h4 class="font-semibold text-sm border-b pb-2">价格配置</h4>
-        <TieredPricingEditor v-model="tieredPricing" :show-cache1h="showCache1h" />
+        <TieredPricingEditor ref="tieredPricingEditorRef" v-model="tieredPricing" :show-cache1h="showCache1h" />
 
         <!-- 按次计费 -->
         <div class="flex items-center gap-3 pt-2 border-t">
@@ -171,6 +171,8 @@ const emit = defineEmits<{
 
 const { error: showError, success: showSuccess } = useToast()
 
+const tieredPricingEditorRef = ref<InstanceType<typeof TieredPricingEditor> | null>(null)
+
 const isEditing = computed(() => !!props.editingModel)
 
 // 计算是否显示 1h 缓存输入框
@@ -325,11 +327,15 @@ async function handleSubmit() {
 
   submitting.value = true
   try {
+    // 获取包含自动计算缓存价格的最终数据
+    const finalTiers = tieredPricingEditorRef.value?.getFinalTiers()
+    const finalTieredPricing = finalTiers ? { tiers: finalTiers } : tieredPricing.value
+
     if (isEditing.value && props.editingModel) {
       // 编辑模式
       // 注意：使用 null 而不是 undefined 来显式清空字段（undefined 会被 JSON 序列化忽略）
       await updateModel(props.providerId, props.editingModel.id, {
-        tiered_pricing: tieredPricing.value,
+        tiered_pricing: finalTieredPricing,
         price_per_request: form.value.price_per_request ?? null,
         supports_vision: form.value.supports_vision,
         supports_function_calling: form.value.supports_function_calling,
@@ -346,7 +352,7 @@ async function handleSubmit() {
         global_model_id: form.value.global_model_id,
         provider_model_name: selectedModel?.name || '',
         // 只有修改了才提交，否则传 undefined 让后端继承 GlobalModel 配置
-        tiered_pricing: tieredPricingModified.value ? tieredPricing.value : undefined,
+        tiered_pricing: tieredPricingModified.value ? finalTieredPricing : undefined,
         price_per_request: form.value.price_per_request,
         supports_vision: form.value.supports_vision,
         supports_function_calling: form.value.supports_function_calling,