release: v1.4.1 — 上传策略设置、保留原图与上传 tagNames

管理员可在设置页配置上传大小、格式、限流与保留原图；上传 API 支持按标签名称打标。

.env.example

@@ -30,6 +30,16 @@
 # 服务端 WebP 压缩质量 1-100（默认 80；也可在设置页配置）
 # WEBP_QUALITY=80
 
+# 上传限制（也可在设置 → 访问控制配置；环境变量优先级更高）
+# UPLOAD_MAX_FILE_SIZE_MB=10
+# ALLOWED_MIME_TYPES=image/jpeg,image/png,image/webp,image/gif,image/svg+xml,image/x-icon
+# UPLOAD_RATE_IP_MAX=60
+# UPLOAD_RATE_TOKEN_MAX=120
+# UPLOAD_RATE_WINDOW_MINUTES=15
+# LOGIN_RATE_MAX=10
+# LOGIN_RATE_WINDOW_MINUTES=15
+# PRESERVE_ORIGINAL_UPLOAD=false
+
 # 自动删除超过 N 天的图片（0 表示关闭；也可在设置页配置）
 # AUTO_DELETE_DAYS=0
 

CHANGELOG.md

@@ -4,6 +4,19 @@
 
 ## [Unreleased]
 
+## [1.4.1] - 2026-09-16
+
+### 新增
+
+- **上传策略（设置 → 基础）**：单文件大小、允许格式、上传/登录限流、保留原图（关闭服务端 WebP 转换）；支持 `.env` 覆盖
+- **上传 API**：可选 `tagNames`（名称不存在则创建，存在则复用）；与 `tagIds` 可并用
+
+### 改进
+
+- 登录接口接入可配置的登录限流
+- 设置页将全站上传策略并入「上传偏好 / 图片处理」；访问控制保留登录限流
+- API 文档补充 `tagIds` / `tagNames` 参数说明
+
 ## [1.4.0] - 2026-09-09
 
 ### 新增

app/components/settings/SettingsUploadPolicyFields.vue

@@ -0,0 +1,329 @@
+<script setup lang="ts">
+type PolicySource = 'env' | 'db' | 'default'
+type MimeType = 'image/jpeg' | 'image/png' | 'image/webp' | 'image/gif' | 'image/svg+xml' | 'image/x-icon'
+
+defineProps<{
+  part: 'upload-preference' | 'image-processing' | 'login-rate'
+  uploadMaxFileSizeMbSource?: PolicySource
+  allowedMimeTypesSource?: PolicySource
+  uploadRateIpMaxSource?: PolicySource
+  uploadRateTokenMaxSource?: PolicySource
+  uploadRateWindowMinutesSource?: PolicySource
+  loginRateMaxSource?: PolicySource
+  loginRateWindowMinutesSource?: PolicySource
+  preserveOriginalUploadSource?: PolicySource
+  mimeTypeOptions?: ReadonlyArray<{ mime: MimeType, label: string }>
+}>()
+
+const uploadMaxFileSizeMbDraft = defineModel<number>('uploadMaxFileSizeMb')
+const allowedMimeTypesDraft = defineModel<MimeType[]>('allowedMimeTypes')
+const uploadRateIpMaxDraft = defineModel<number>('uploadRateIpMax')
+const uploadRateTokenMaxDraft = defineModel<number>('uploadRateTokenMax')
+const uploadRateWindowMinutesDraft = defineModel<number>('uploadRateWindowMinutes')
+const loginRateMaxDraft = defineModel<number>('loginRateMax')
+const loginRateWindowMinutesDraft = defineModel<number>('loginRateWindowMinutes')
+const preserveOriginalUploadDraft = defineModel<boolean>('preserveOriginalUpload')
+
+const { t } = useI18n()
+
+function sourceBadge(source: PolicySource) {
+  switch (source) {
+    case 'env':
+      return { label: t('settings.badgeEnv'), color: 'warning' as const }
+    case 'db':
+      return { label: t('settings.badgeSaved'), color: 'success' as const }
+    default:
+      return { label: t('settings.badgeDefault'), color: 'neutral' as const }
+  }
+}
+
+function toggleMime(mime: MimeType, checked: boolean) {
+  if (!allowedMimeTypesDraft.value) return
+  if (checked) {
+    if (!allowedMimeTypesDraft.value.includes(mime)) {
+      allowedMimeTypesDraft.value = [...allowedMimeTypesDraft.value, mime]
+    }
+    return
+  }
+  if (allowedMimeTypesDraft.value.length <= 1) return
+  allowedMimeTypesDraft.value = allowedMimeTypesDraft.value.filter(item => item !== mime)
+}
+
+function isMimeChecked(mime: MimeType): boolean {
+  return allowedMimeTypesDraft.value?.includes(mime) ?? false
+}
+
+function clampUploadMaxFileSizeMb(value: unknown): number {
+  const num = Number(value)
+  if (!Number.isFinite(num)) return uploadMaxFileSizeMbDraft.value ?? 10
+  return Math.min(100, Math.max(1, Math.round(num)))
+}
+
+function onUploadMaxFileSizeInput(event: Event) {
+  uploadMaxFileSizeMbDraft.value = clampUploadMaxFileSizeMb(
+    (event.target as HTMLInputElement).value
+  )
+}
+
+function onUploadMaxFileSizeNumberInput(value: string | number) {
+  uploadMaxFileSizeMbDraft.value = clampUploadMaxFileSizeMb(value)
+}
+</script>
+
+<template>
+  <template v-if="part === 'upload-preference'">
+    <div class="py-4">
+      <div class="flex flex-wrap items-center gap-2">
+        <p class="text-sm font-medium text-highlighted">
+          {{ t('settings.uploadMaxFileSize') }}
+        </p>
+        <UBadge
+          v-if="uploadMaxFileSizeMbSource"
+          :color="sourceBadge(uploadMaxFileSizeMbSource).color"
+          variant="subtle"
+          size="xs"
+        >
+          {{ sourceBadge(uploadMaxFileSizeMbSource).label }}
+        </UBadge>
+      </div>
+      <p class="mt-1 text-xs leading-relaxed text-muted">
+        {{ t('settings.uploadMaxFileSizeHint') }}
+      </p>
+      <div
+        class="mt-3 flex items-center gap-3"
+        :class="uploadMaxFileSizeMbSource === 'env' ? 'pointer-events-none opacity-60' : ''"
+      >
+        <input
+          type="range"
+          min="1"
+          max="100"
+          :value="uploadMaxFileSizeMbDraft"
+          class="h-1.5 min-w-0 flex-1 cursor-pointer appearance-none rounded-full bg-muted accent-primary"
+          :disabled="uploadMaxFileSizeMbSource === 'env'"
+          @input="onUploadMaxFileSizeInput"
+        >
+        <div class="flex shrink-0 items-center gap-1.5">
+          <UInput
+            :model-value="uploadMaxFileSizeMbDraft"
+            type="number"
+            :min="1"
+            :max="100"
+            size="xs"
+            class="w-14 tabular-nums"
+            :disabled="uploadMaxFileSizeMbSource === 'env'"
+            @update:model-value="onUploadMaxFileSizeNumberInput"
+          />
+          <span class="text-xs text-muted">MB</span>
+        </div>
+      </div>
+    </div>
+
+    <div class="py-4">
+      <div class="flex flex-wrap items-center gap-2">
+        <p class="text-sm font-medium text-highlighted">
+          {{ t('settings.allowedMimeTypes') }}
+        </p>
+        <UBadge
+          v-if="allowedMimeTypesSource"
+          :color="sourceBadge(allowedMimeTypesSource).color"
+          variant="subtle"
+          size="xs"
+        >
+          {{ sourceBadge(allowedMimeTypesSource).label }}
+        </UBadge>
+      </div>
+      <p class="mt-1 text-xs leading-relaxed text-muted">
+        {{ t('settings.allowedMimeTypesHint') }}
+      </p>
+      <div
+        class="mt-3 flex flex-wrap gap-2"
+        :class="allowedMimeTypesSource === 'env' ? 'pointer-events-none opacity-60' : ''"
+      >
+        <label
+          v-for="option in mimeTypeOptions ?? []"
+          :key="option.mime"
+          class="inline-flex cursor-pointer items-center gap-2 rounded-lg border px-3 py-2 text-sm transition-colors"
+          :class="isMimeChecked(option.mime)
+            ? 'border-primary/40 bg-primary/5'
+            : 'border-default bg-muted/20 hover:bg-muted/40'"
+          :title="option.mime"
+        >
+          <UCheckbox
+            :model-value="isMimeChecked(option.mime)"
+            @update:model-value="(v) => toggleMime(option.mime, v === true)"
+            @click.stop
+          />
+          <span class="font-medium text-highlighted">{{ option.label }}</span>
+        </label>
+      </div>
+    </div>
+
+    <div class="py-4">
+      <p class="text-sm font-medium text-highlighted">
+        {{ t('settings.uploadRateGroup') }}
+      </p>
+      <p class="mt-1 text-xs leading-relaxed text-muted">
+        {{ t('settings.uploadRateFootnote') }}
+      </p>
+      <div class="mt-3 grid gap-4 sm:grid-cols-3">
+        <div>
+          <div class="flex flex-wrap items-center gap-2">
+            <p class="text-xs font-medium text-muted">
+              {{ t('settings.uploadRateIpMax') }}
+            </p>
+            <UBadge
+              v-if="uploadRateIpMaxSource"
+              :color="sourceBadge(uploadRateIpMaxSource).color"
+              variant="subtle"
+              size="xs"
+            >
+              {{ sourceBadge(uploadRateIpMaxSource).label }}
+            </UBadge>
+          </div>
+          <UInput
+            v-model.number="uploadRateIpMaxDraft"
+            type="number"
+            :min="1"
+            :max="1000"
+            size="sm"
+            class="mt-2 w-full tabular-nums"
+            :disabled="uploadRateIpMaxSource === 'env'"
+          />
+        </div>
+        <div>
+          <div class="flex flex-wrap items-center gap-2">
+            <p class="text-xs font-medium text-muted">
+              {{ t('settings.uploadRateTokenMax') }}
+            </p>
+            <UBadge
+              v-if="uploadRateTokenMaxSource"
+              :color="sourceBadge(uploadRateTokenMaxSource).color"
+              variant="subtle"
+              size="xs"
+            >
+              {{ sourceBadge(uploadRateTokenMaxSource).label }}
+            </UBadge>
+          </div>
+          <UInput
+            v-model.number="uploadRateTokenMaxDraft"
+            type="number"
+            :min="1"
+            :max="5000"
+            size="sm"
+            class="mt-2 w-full tabular-nums"
+            :disabled="uploadRateTokenMaxSource === 'env'"
+          />
+        </div>
+        <div>
+          <div class="flex flex-wrap items-center gap-2">
+            <p class="text-xs font-medium text-muted">
+              {{ t('settings.uploadRateWindowMinutes') }}
+            </p>
+            <UBadge
+              v-if="uploadRateWindowMinutesSource"
+              :color="sourceBadge(uploadRateWindowMinutesSource).color"
+              variant="subtle"
+              size="xs"
+            >
+              {{ sourceBadge(uploadRateWindowMinutesSource).label }}
+            </UBadge>
+          </div>
+          <div class="mt-2 flex items-center gap-2">
+            <UInput
+              v-model.number="uploadRateWindowMinutesDraft"
+              type="number"
+              :min="1"
+              :max="1440"
+              size="sm"
+              class="w-full tabular-nums"
+              :disabled="uploadRateWindowMinutesSource === 'env'"
+            />
+            <span class="shrink-0 text-xs text-muted">{{ t('settings.minutesUnit') }}</span>
+          </div>
+        </div>
+      </div>
+    </div>
+  </template>
+
+  <SettingsToggleRow
+    v-else-if="part === 'image-processing'"
+    v-model="preserveOriginalUploadDraft!"
+    :disabled="preserveOriginalUploadSource === 'env'"
+  >
+    <template #title>
+      <span class="inline-flex flex-wrap items-center gap-2">
+        {{ t('settings.preserveOriginalUpload') }}
+        <UBadge
+          v-if="preserveOriginalUploadSource"
+          :color="sourceBadge(preserveOriginalUploadSource).color"
+          variant="subtle"
+          size="xs"
+        >
+          {{ sourceBadge(preserveOriginalUploadSource).label }}
+        </UBadge>
+      </span>
+    </template>
+    <template #hint>
+      {{ t('settings.preserveOriginalUploadHint') }}
+    </template>
+  </SettingsToggleRow>
+
+  <template v-else-if="part === 'login-rate'">
+    <div class="grid gap-4 py-4 sm:grid-cols-2">
+      <div>
+        <div class="flex flex-wrap items-center gap-2">
+          <p class="text-sm font-medium text-highlighted">
+            {{ t('settings.loginRateMax') }}
+          </p>
+          <UBadge
+            v-if="loginRateMaxSource"
+            :color="sourceBadge(loginRateMaxSource).color"
+            variant="subtle"
+            size="xs"
+          >
+            {{ sourceBadge(loginRateMaxSource).label }}
+          </UBadge>
+        </div>
+        <UInput
+          v-model.number="loginRateMaxDraft"
+          type="number"
+          :min="1"
+          :max="100"
+          size="sm"
+          class="mt-2 w-full tabular-nums"
+          :disabled="loginRateMaxSource === 'env'"
+        />
+      </div>
+      <div>
+        <div class="flex flex-wrap items-center gap-2">
+          <p class="text-sm font-medium text-highlighted">
+            {{ t('settings.loginRateWindowMinutes') }}
+          </p>
+          <UBadge
+            v-if="loginRateWindowMinutesSource"
+            :color="sourceBadge(loginRateWindowMinutesSource).color"
+            variant="subtle"
+            size="xs"
+          >
+            {{ sourceBadge(loginRateWindowMinutesSource).label }}
+          </UBadge>
+        </div>
+        <div class="mt-2 flex items-center gap-2">
+          <UInput
+            v-model.number="loginRateWindowMinutesDraft"
+            type="number"
+            :min="1"
+            :max="1440"
+            size="sm"
+            class="w-full tabular-nums"
+            :disabled="loginRateWindowMinutesSource === 'env'"
+          />
+          <span class="shrink-0 text-xs text-muted">{{ t('settings.minutesUnit') }}</span>
+        </div>
+      </div>
+    </div>
+    <p class="pb-4 text-xs leading-relaxed text-muted">
+      {{ t('settings.loginRateFootnote') }}
+    </p>
+  </template>
+</template>

app/components/settings/SettingsUserPreferencesFields.vue

@@ -1,4 +1,8 @@
 <script setup lang="ts">
+defineProps<{
+  part: 'upload-preference' | 'image-processing'
+}>()
+
 const {
   compressEnabled,
   autoCopyMarkdown,
@@ -44,111 +48,107 @@ onMounted(() => {
 </script>
 
 <template>
-  <SettingsSection :title="t('preferences.processing')">
+  <template v-if="part === 'image-processing'">
-    <SettingsGroup>
+    <SettingsToggleRow
-      <SettingsToggleRow
+      v-model="compressEnabled"
-        v-model="compressEnabled"
+      :title="t('preferences.clientCompress')"
-        :title="t('preferences.clientCompress')"
+      :hint="t('preferences.clientCompressHint')"
-        :hint="t('preferences.clientCompressHint')"
+    />
-      />
+    <div
-      <div
+      v-if="userSettings"
-        v-if="userSettings"
+      class="flex items-start justify-between gap-4 py-4"
-        class="flex items-start justify-between gap-4 py-4"
+    >
-      >
+      <div class="min-w-0 flex-1 pr-2">
-        <div class="min-w-0 flex-1 pr-2">
+        <p class="flex flex-wrap items-center gap-x-1.5 gap-y-1 text-sm font-medium text-highlighted">
-          <p class="flex flex-wrap items-center gap-x-1.5 gap-y-1 text-sm font-medium text-highlighted">
+          <span>{{ t('preferences.autoDeletePrefix') }}</span>
-            <span>{{ t('preferences.autoDeletePrefix') }}</span>
-            <UInput
-              v-model.number="userAutoDeleteDaysDraft"
-              type="number"
-              min="1"
-              max="3650"
-              size="xs"
-              class="w-14 tabular-nums"
-              :class="userAutoDeleteEnabled ? '' : 'pointer-events-none opacity-40'"
-            />
-            <span>{{ t('preferences.autoDeleteSuffix') }}</span>
-          </p>
-          <p class="mt-1 text-xs leading-relaxed text-muted">
-            {{ t('preferences.autoDeleteHint') }}
-          </p>
-        </div>
-        <USwitch
-          v-model="userAutoDeleteEnabled"
-          class="mt-0.5 shrink-0"
-        />
-      </div>
-      <div
-        v-else
-        class="flex justify-center py-4"
-      >
-        <UIcon
-          name="i-lucide-loader-circle"
-          class="size-5 animate-spin text-muted"
-        />
-      </div>
-      <div class="py-4">
-        <div class="min-w-0">
-          <p class="text-sm font-medium text-highlighted">
-            {{ t('preferences.webpQuality') }}
-          </p>
-          <p class="mt-1 text-xs leading-relaxed text-muted">
-            {{ t('preferences.webpQualityHint') }}
-          </p>
-        </div>
-        <div class="mt-3 flex items-center gap-3">
-          <input
-            type="range"
-            min="1"
-            max="100"
-            :value="clientWebpQuality"
-            class="h-1.5 min-w-0 flex-1 cursor-pointer appearance-none rounded-full bg-muted accent-primary"
-            @input="onClientQualityInput"
-          >
           <UInput
-            :model-value="clientWebpQuality"
+            v-model.number="userAutoDeleteDaysDraft"
             type="number"
             min="1"
-            max="100"
+            max="3650"
             size="xs"
-            class="w-14 shrink-0 tabular-nums"
+            class="w-14 tabular-nums"
-            @update:model-value="onClientQualityNumberInput"
+            :class="userAutoDeleteEnabled ? '' : 'pointer-events-none opacity-40'"
           />
-        </div>
+          <span>{{ t('preferences.autoDeleteSuffix') }}</span>
-      </div>
-    </SettingsGroup>
-  </SettingsSection>
-
-  <SettingsSection :title="t('preferences.title')">
-    <SettingsGroup>
-      <SettingsToggleRow
-        v-model="autoCopyMarkdown"
-        :title="t('preferences.autoCopy')"
-        :hint="t('preferences.autoCopyHint')"
-      />
-      <div class="py-4">
-        <p class="text-sm font-medium text-highlighted">
-          {{ t('settings.defaultCopyFormat') }}
         </p>
         <p class="mt-1 text-xs leading-relaxed text-muted">
-          {{ t('settings.defaultCopyFormatHint') }}
+          {{ t('preferences.autoDeleteHint') }}
         </p>
-        <div
-          class="mt-3 flex w-full max-w-md gap-1 rounded-lg border border-default p-0.5"
-          :class="autoCopyMarkdown ? '' : 'pointer-events-none opacity-40'"
-        >
-          <UButton
-            v-for="item in copyFormatItems"
-            :key="item.value"
-            size="xs"
-            class="flex-1 justify-center"
-            :variant="copyFormat === item.value ? 'solid' : 'ghost'"
-            :color="copyFormat === item.value ? 'primary' : 'neutral'"
-            :label="item.label"
-            @click="setCopyFormat(item.value)"
-          />
-        </div>
       </div>
-    </SettingsGroup>
+      <USwitch
-  </SettingsSection>
+        v-model="userAutoDeleteEnabled"
+        class="mt-0.5 shrink-0"
+      />
+    </div>
+    <div
+      v-else
+      class="flex justify-center py-4"
+    >
+      <UIcon
+        name="i-lucide-loader-circle"
+        class="size-5 animate-spin text-muted"
+      />
+    </div>
+    <div class="py-4">
+      <div class="min-w-0">
+        <p class="text-sm font-medium text-highlighted">
+          {{ t('preferences.webpQuality') }}
+        </p>
+        <p class="mt-1 text-xs leading-relaxed text-muted">
+          {{ t('preferences.webpQualityHint') }}
+        </p>
+      </div>
+      <div class="mt-3 flex items-center gap-3">
+        <input
+          type="range"
+          min="1"
+          max="100"
+          :value="clientWebpQuality"
+          class="h-1.5 min-w-0 flex-1 cursor-pointer appearance-none rounded-full bg-muted accent-primary"
+          @input="onClientQualityInput"
+        >
+        <UInput
+          :model-value="clientWebpQuality"
+          type="number"
+          min="1"
+          max="100"
+          size="xs"
+          class="w-14 shrink-0 tabular-nums"
+          @update:model-value="onClientQualityNumberInput"
+        />
+      </div>
+    </div>
+  </template>
+
+  <template v-else>
+    <SettingsToggleRow
+      v-model="autoCopyMarkdown"
+      :title="t('preferences.autoCopy')"
+      :hint="t('preferences.autoCopyHint')"
+    />
+    <div class="py-4">
+      <p class="text-sm font-medium text-highlighted">
+        {{ t('settings.defaultCopyFormat') }}
+      </p>
+      <p class="mt-1 text-xs leading-relaxed text-muted">
+        {{ t('settings.defaultCopyFormatHint') }}
+      </p>
+      <div
+        class="mt-3 flex w-full max-w-md gap-1 rounded-lg border border-default p-0.5"
+        :class="autoCopyMarkdown ? '' : 'pointer-events-none opacity-40'"
+      >
+        <UButton
+          v-for="item in copyFormatItems"
+          :key="item.value"
+          size="xs"
+          class="flex-1 justify-center"
+          :variant="copyFormat === item.value ? 'solid' : 'ghost'"
+          :color="copyFormat === item.value ? 'primary' : 'neutral'"
+          :label="item.label"
+          @click="setCopyFormat(item.value)"
+        />
+      </div>
+    </div>
+  </template>
 </template>

app/composables/useApiDocs.ts

@@ -73,11 +73,26 @@ export function buildApiDocs(ctx: ApiDocsContext): ApiDocEndpoint[] {
           location: 'form-data',
           required: false,
           descriptionKey: 'api.params.upload.token'
+        },
+        {
+          name: 'tagIds',
+          type: 'string',
+          location: 'form-data',
+          required: false,
+          descriptionKey: 'api.params.upload.tagIds'
+        },
+        {
+          name: 'tagNames',
+          type: 'string',
+          location: 'form-data',
+          required: false,
+          descriptionKey: 'api.params.upload.tagNames'
         }
       ],
       curl: `curl -X POST "${baseUrl}/api/images/upload" \\
   ${auth} \\
-  -F "image=@./demo.png"`,
+  -F "image=@./demo.png" \\
+  -F 'tagNames=["博客","截图"]'`,
       responseExample: `{
   "success": true,
   "items": [

app/pages/settings/index.vue

@@ -3,10 +3,13 @@ import type { SettingsTab } from '~/types/settings'
 import { ADMIN_SETTINGS_TABS, USER_SETTINGS_TABS } from '~/types/settings'
 import { willActivateDomainSeparation } from '~/utils/domain-separation'
 import SettingsUserPreferencesFields from '~/components/settings/SettingsUserPreferencesFields.vue'
+import SettingsUploadPolicyFields from '~/components/settings/SettingsUploadPolicyFields.vue'
 
 type SettingSource = 'env' | 'db' | 'none'
 type WebpQualitySource = 'env' | 'db' | 'default'
+type PolicySource = 'env' | 'db' | 'default'
 type LoginVerificationMethod = 'slider' | 'turnstile' | 'cap'
+type MimeType = 'image/jpeg' | 'image/png' | 'image/webp' | 'image/gif' | 'image/svg+xml' | 'image/x-icon'
 
 interface SettingsResponse {
   apiUploadToken: string
@@ -42,6 +45,23 @@ interface SettingsResponse {
   capApiEndpoint: string
   capSecret: string
   appVersion: string
+  uploadMaxFileSizeMb: number
+  uploadMaxFileSizeMbSource: PolicySource
+  allowedMimeTypes: MimeType[]
+  allowedMimeTypesSource: PolicySource
+  uploadRateIpMax: number
+  uploadRateIpMaxSource: PolicySource
+  uploadRateTokenMax: number
+  uploadRateTokenMaxSource: PolicySource
+  uploadRateWindowMinutes: number
+  uploadRateWindowMinutesSource: PolicySource
+  loginRateMax: number
+  loginRateMaxSource: PolicySource
+  loginRateWindowMinutes: number
+  loginRateWindowMinutesSource: PolicySource
+  preserveOriginalUpload: boolean
+  preserveOriginalUploadSource: PolicySource
+  mimeTypeOptions: ReadonlyArray<{ mime: MimeType, label: string }>
 }
 
 const { isChecking, isAuthenticated, checkSession, handleAuthError, fetchStatus, isAdmin } = useAuth()
@@ -143,6 +163,15 @@ const disableDomainSeparationOpen = ref(false)
 const pendingDomainSeparationDisable = ref(false)
 const domainSeparationSaveConfirmOpen = ref(false)
 
+const uploadMaxFileSizeMbDraft = ref(10)
+const allowedMimeTypesDraft = ref<MimeType[]>([])
+const uploadRateIpMaxDraft = ref(60)
+const uploadRateTokenMaxDraft = ref(120)
+const uploadRateWindowMinutesDraft = ref(15)
+const loginRateMaxDraft = ref(10)
+const loginRateWindowMinutesDraft = ref(15)
+const preserveOriginalUploadDraft = ref(false)
+
 interface ReleaseCheckResponse {
   currentVersion: string
   latestVersion: string | null
@@ -152,6 +181,10 @@ interface ReleaseCheckResponse {
 
 const releaseCheck = ref<ReleaseCheckResponse | null>(null)
 
+function mimeListsEqual(left: readonly string[], right: readonly string[]): boolean {
+  return left.slice().sort().join(',') === right.slice().sort().join(',')
+}
+
 const hasServerChanges = computed(() => {
   if (!settings.value) return false
   return refererDraft.value !== settings.value.allowedRefererHosts
@@ -166,6 +199,14 @@ const hasServerChanges = computed(() => {
     || turnstileSecretKeyDraft.value !== settings.value.turnstileSecretKey
     || capApiEndpointDraft.value !== settings.value.capApiEndpoint
     || capSecretDraft.value !== settings.value.capSecret
+    || uploadMaxFileSizeMbDraft.value !== settings.value.uploadMaxFileSizeMb
+    || !mimeListsEqual(allowedMimeTypesDraft.value, settings.value.allowedMimeTypes)
+    || uploadRateIpMaxDraft.value !== settings.value.uploadRateIpMax
+    || uploadRateTokenMaxDraft.value !== settings.value.uploadRateTokenMax
+    || uploadRateWindowMinutesDraft.value !== settings.value.uploadRateWindowMinutes
+    || loginRateMaxDraft.value !== settings.value.loginRateMax
+    || loginRateWindowMinutesDraft.value !== settings.value.loginRateWindowMinutes
+    || preserveOriginalUploadDraft.value !== settings.value.preserveOriginalUpload
 })
 
 const domainSeparationWouldActivate = computed(() =>
@@ -221,6 +262,14 @@ function applySettings(data: SettingsResponse) {
   capApiEndpointDraft.value = data.capApiEndpoint
   capSecretDraft.value = data.capSecret
   domainSeparationDraft.value = data.domainSeparation
+  uploadMaxFileSizeMbDraft.value = data.uploadMaxFileSizeMb
+  allowedMimeTypesDraft.value = [...data.allowedMimeTypes]
+  uploadRateIpMaxDraft.value = data.uploadRateIpMax
+  uploadRateTokenMaxDraft.value = data.uploadRateTokenMax
+  uploadRateWindowMinutesDraft.value = data.uploadRateWindowMinutes
+  loginRateMaxDraft.value = data.loginRateMax
+  loginRateWindowMinutesDraft.value = data.loginRateWindowMinutes
+  preserveOriginalUploadDraft.value = data.preserveOriginalUpload
 }
 
 async function patchSettings(body: Record<string, unknown>) {
@@ -296,6 +345,11 @@ async function performSaveServerSettings() {
 
   savingServer.value = true
   try {
+    if (allowedMimeTypesDraft.value.length === 0) {
+      toast.add({ title: t('settings.allowedMimeTypesHint'), color: 'error' })
+      return
+    }
+
     await patchSettings({
       allowedRefererHosts: refererDraft.value,
       domainSeparation: domainSeparationDraft.value,
@@ -308,7 +362,15 @@ async function performSaveServerSettings() {
       turnstileSiteKey: turnstileSiteKeyDraft.value,
       turnstileSecretKey: turnstileSecretKeyDraft.value,
       capApiEndpoint: capApiEndpointDraft.value,
-      capSecret: capSecretDraft.value
+      capSecret: capSecretDraft.value,
+      uploadMaxFileSizeMb: uploadMaxFileSizeMbDraft.value,
+      allowedMimeTypes: allowedMimeTypesDraft.value,
+      uploadRateIpMax: uploadRateIpMaxDraft.value,
+      uploadRateTokenMax: uploadRateTokenMaxDraft.value,
+      uploadRateWindowMinutes: uploadRateWindowMinutesDraft.value,
+      loginRateMax: loginRateMaxDraft.value,
+      loginRateWindowMinutes: loginRateWindowMinutesDraft.value,
+      preserveOriginalUpload: preserveOriginalUploadDraft.value
     })
     toast.add({ title: t('settings.saved'), color: 'success' })
   } catch (error: unknown) {
@@ -492,7 +554,42 @@ watch(isAdmin, () => {
                     </SettingsGroup>
                   </SettingsSection>
 
-                  <SettingsUserPreferencesFields />
+                  <SettingsSection
+                    :title="t('preferences.title')"
+                    :hint="t('settings.uploadLimitsHint')"
+                  >
+                    <SettingsGroup>
+                      <SettingsUploadPolicyFields
+                        v-model:upload-max-file-size-mb="uploadMaxFileSizeMbDraft"
+                        v-model:allowed-mime-types="allowedMimeTypesDraft"
+                        v-model:upload-rate-ip-max="uploadRateIpMaxDraft"
+                        v-model:upload-rate-token-max="uploadRateTokenMaxDraft"
+                        v-model:upload-rate-window-minutes="uploadRateWindowMinutesDraft"
+                        part="upload-preference"
+                        :upload-max-file-size-mb-source="settings.uploadMaxFileSizeMbSource"
+                        :allowed-mime-types-source="settings.allowedMimeTypesSource"
+                        :upload-rate-ip-max-source="settings.uploadRateIpMaxSource"
+                        :upload-rate-token-max-source="settings.uploadRateTokenMaxSource"
+                        :upload-rate-window-minutes-source="settings.uploadRateWindowMinutesSource"
+                        :mime-type-options="settings.mimeTypeOptions"
+                      />
+                      <SettingsUserPreferencesFields part="upload-preference" />
+                    </SettingsGroup>
+                  </SettingsSection>
+
+                  <SettingsSection
+                    :title="t('preferences.processing')"
+                    :hint="t('settings.imageProcessingHint')"
+                  >
+                    <SettingsGroup>
+                      <SettingsUploadPolicyFields
+                        v-model:preserve-original-upload="preserveOriginalUploadDraft"
+                        part="image-processing"
+                        :preserve-original-upload-source="settings.preserveOriginalUploadSource"
+                      />
+                      <SettingsUserPreferencesFields part="image-processing" />
+                    </SettingsGroup>
+                  </SettingsSection>
 
                   <SettingsSection :title="t('settings.systemInfo')">
                     <SettingsGroup>
@@ -897,6 +994,21 @@ watch(isAdmin, () => {
                       </div>
                     </SettingsGroup>
                   </SettingsSection>
+
+                  <SettingsSection
+                    :title="t('settings.rateLimits')"
+                    :hint="t('settings.loginRateLimitsHint')"
+                  >
+                    <SettingsGroup>
+                      <SettingsUploadPolicyFields
+                        v-model:login-rate-max="loginRateMaxDraft"
+                        v-model:login-rate-window-minutes="loginRateWindowMinutesDraft"
+                        part="login-rate"
+                        :login-rate-max-source="settings.loginRateMaxSource"
+                        :login-rate-window-minutes-source="settings.loginRateWindowMinutesSource"
+                      />
+                    </SettingsGroup>
+                  </SettingsSection>
                 </SettingsPanel>
                 <div
                   v-else

docs-site/en/guide/changelog.md

@@ -4,6 +4,17 @@ Version history and notable changes. The full log is also in the repo root [CHAN
 
 ---
 
+## [1.4.1] — 2026-09-16
+
+### Added
+
+- **Upload policy (Settings → Basic)**: max size, allowed formats, rate limits, preserve originals; env override
+- **Upload API**: optional `tagNames` for tagging by name (create or reuse)
+
+### Improved
+
+- Configurable login rate limits; settings layout updates
+
 ## [1.4.0] — 2026-09-09
 
 ### Added

docs-site/guide/changelog.md

@@ -4,6 +4,17 @@ PicHost 版本历史与重要变更说明。完整记录亦见仓库根目录 [C
 
 ---
 
+## [1.4.1] — 2026-09-16
+
+### 新增
+
+- **上传策略（设置 → 基础）**：大小、格式、限流、保留原图；环境变量可覆盖
+- **上传 API**：可选 `tagNames` 按名称打标（自动创建或复用）
+
+### 改进
+
+- 登录限流可配置；设置页布局调整
+
 ## [1.4.0] — 2026-09-09
 
 ### 新增

i18n/locales/en.json

@@ -286,12 +286,12 @@
     "back": "Back to upload",
     "processing": "Image processing",
     "clientCompress": "Client-side compression",
-    "clientCompressHint": "Compress in the browser before upload (server still converts to WebP)",
+    "clientCompressHint": "Compress in the browser before upload. The server may still convert to WebP unless “Preserve originals” is enabled above.",
     "autoDeletePrefix": "Auto-delete after",
     "autoDeleteSuffix": "days",
     "autoDeleteHint": "Only affects images uploaded after enabling; existing images are kept",
     "webpQuality": "WebP quality",
-    "webpQualityHint": "Client compression quality (1–100); requires client-side compression",
+    "webpQualityHint": "Quality for client-side WebP pre-compression; higher values mean better quality and larger files.",
     "current": "Current: {n}",
     "qualityHigh": "High quality",
     "qualityMedium": "Medium quality",
@@ -414,7 +414,31 @@
     "envOverride": "Overridden by environment variable; cannot edit in UI",
     "saved": "Settings saved",
     "saveFailed": "Failed to save settings",
-    "loadFailed": "Failed to load settings"
+    "loadFailed": "Failed to load settings",
+    "uploadLimits": "Upload limits",
+    "uploadLimitsHint": "Site-wide upload policy and your personal convenience options. Applies after save.",
+    "imageProcessingHint": "Site-wide format conversion and personal compression/cleanup.",
+    "serverPolicy": "Site-wide",
+    "personalPreference": "Personal",
+    "uploadRateGroup": "Upload rate limits",
+    "minutesUnit": "min",
+    "uploadMaxFileSize": "Max file size",
+    "uploadMaxFileSizeHint": "Uploads larger than this are rejected (1–100 MB).",
+    "allowedMimeTypes": "Allowed image formats",
+    "allowedMimeTypesHint": "Keep at least one format enabled. The server validates file signatures, not just extensions.",
+    "preserveOriginalUpload": "Preserve originals (disable WebP conversion)",
+    "preserveOriginalUploadHint": "When enabled, JPEG/PNG/GIF uploads are stored as-is instead of converting to WebP.",
+    "rateLimits": "Rate limits",
+    "rateLimitsHint": "Protect against upload abuse and login brute force.",
+    "loginRateLimitsHint": "Protect the login endpoint from brute-force attempts.",
+    "uploadRateFootnote": "Returns 429 when exceeded within the window. Token uploads are counted separately.",
+    "loginRateFootnote": "Returns 429 when exceeded within the window.",
+    "uploadRateIpMax": "Upload limit (per IP)",
+    "uploadRateTokenMax": "Upload limit (per token)",
+    "uploadRateWindowMinutes": "Upload window (minutes)",
+    "loginRateMax": "Login limit (per IP)",
+    "loginRateWindowMinutes": "Login window (minutes)",
+    "rateLimitsFootnote": "Exceeding the limit within the window returns HTTP 429. Token uploads are counted separately."
   },
   "storage": {
     "title": "Storage",
@@ -854,7 +878,9 @@
         "image": "Primary upload field",
         "file": "Compatibility field, single file",
         "files": "Compatibility field, multiple files",
-        "token": "Twikoo protocol form token"
+        "token": "Twikoo protocol form token",
+        "tagIds": "Optional JSON array or repeated fields; tag images by ID after upload",
+        "tagNames": "Optional JSON array or comma-separated names; creates missing tags, reuses existing"
       },
       "list": {
         "limit": "Page size, default 20, max 100",

i18n/locales/zh-CN.json

@@ -286,12 +286,12 @@
     "back": "返回上传",
     "processing": "图片处理",
     "clientCompress": "客户端预压缩",
-    "clientCompressHint": "在上传前于浏览器端压缩图片，减少上传体积（服务端仍会转 WebP）。",
+    "clientCompressHint": "上传前在浏览器端压缩以减小体积；若未开启上方「保留原图」，服务端仍可能转为 WebP。",
     "autoDeletePrefix": "自动删除超过",
     "autoDeleteSuffix": "天的图片",
     "autoDeleteHint": "自动清理指定天数前上传的图片，仅对开启后新上传的图片生效。",
     "webpQuality": "WebP 压缩质量",
-    "webpQualityHint": "转换为 WebP 格式时的图片质量，数值越高画质越好、体积越大。",
+    "webpQualityHint": "客户端预压缩为 WebP 时的质量；数值越高画质越好、体积越大。",
     "current": "当前：{n}",
     "qualityHigh": "高质量",
     "qualityMedium": "中等质量",
@@ -414,7 +414,31 @@
     "envOverride": "该项已由环境变量覆盖，无法在后台修改",
     "saved": "服务器配置已保存",
     "saveFailed": "保存服务器配置失败",
-    "loadFailed": "加载设置失败"
+    "loadFailed": "加载设置失败",
+    "uploadLimits": "上传限制",
+    "uploadLimitsHint": "全站上传策略与个人上传便捷选项，保存后立即生效。",
+    "imageProcessingHint": "全站格式转换与个人端压缩、清理策略。",
+    "serverPolicy": "全站策略",
+    "personalPreference": "个人偏好",
+    "uploadRateGroup": "上传限流",
+    "minutesUnit": "分钟",
+    "uploadMaxFileSize": "单文件大小上限",
+    "uploadMaxFileSizeHint": "超过此大小的图片将被拒绝上传（1–100 MB）。",
+    "allowedMimeTypes": "允许的图片格式",
+    "allowedMimeTypesHint": "至少保留一种格式；服务端会校验文件签名，不仅看扩展名。",
+    "preserveOriginalUpload": "保留原图（关闭 WebP 转换）",
+    "preserveOriginalUploadHint": "开启后上传的 JPEG/PNG/GIF 不再转为 WebP，按原格式存储；关闭时可节省空间。",
+    "rateLimits": "限流",
+    "rateLimitsHint": "防止恶意刷上传或暴力登录。",
+    "loginRateLimitsHint": "防止登录接口被暴力尝试。",
+    "uploadRateFootnote": "窗口期内超过次数将返回 429；带 Token 的上传单独计数。",
+    "loginRateFootnote": "窗口期内超过次数将返回 429。",
+    "uploadRateIpMax": "上传限流（每 IP）",
+    "uploadRateTokenMax": "上传限流（每 Token）",
+    "uploadRateWindowMinutes": "上传限流窗口（分钟）",
+    "loginRateMax": "登录限流（每 IP）",
+    "loginRateWindowMinutes": "登录限流窗口（分钟）",
+    "rateLimitsFootnote": "窗口期内超过次数将返回 429。带 Token 的上传单独计数。"
   },
   "storage": {
     "title": "存储设置",
@@ -855,7 +879,8 @@
         "file": "兼容字段，单图上传",
         "files": "兼容字段，多图上传",
         "token": "Twikoo 协议兼容，表单 token",
-        "tagIds": "可选，JSON 数组或重复字段，上传后自动打标"
+        "tagIds": "可选，JSON 数组或重复字段，上传后按 ID 打标",
+        "tagNames": "可选，JSON 数组或逗号分隔；名称不存在则自动创建，存在则复用"
       },
       "list": {
         "limit": "每页条数，默认 20，最大 100",

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "pichost",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "pichost",
-      "version": "1.4.0",
+      "version": "1.4.1",
       "hasInstallScript": true,
       "license": "GPL-3.0-only",
       "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pichost",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "description": "Self-hosted image hosting for your NAS / home server — Nuxt admin UI, local disk or S3-compatible storage, server-side WebP compression, referer protection, Twikoo/EasyImage compatible.",
   "homepage": "https://github.com/O96u/PicHost#readme",
   "repository": {

server/api/auth/login.post.ts

@@ -14,6 +14,7 @@ import { getAdminSecret } from '../../utils/env'
 import { verifyLoginVerification, type VerificationBody } from '../../utils/login-verification'
 import { logActivity } from '../../utils/activity-log'
 import { clientIp, logInfo, logWarn } from '../../utils/logger'
+import { checkLoginRateLimit } from '../../utils/rate-limit'
 
 interface LoginBody extends VerificationBody {
   username?: string
@@ -21,29 +22,9 @@ interface LoginBody extends VerificationBody {
   secret?: string
 }
 
-const loginAttempts = new Map<string, { count: number, resetAt: number }>()
-const MAX_ATTEMPTS = 10
-const WINDOW_MS = 15 * 60 * 1000
-
-function checkRateLimit(ip: string): void {
-  const now = Date.now()
-  const entry = loginAttempts.get(ip)
-  if (!entry || now > entry.resetAt) {
-    loginAttempts.set(ip, { count: 1, resetAt: now + WINDOW_MS })
-    return
-  }
-  entry.count += 1
-  if (entry.count > MAX_ATTEMPTS) {
-    throw createError({
-      statusCode: 429,
-      statusMessage: '登录尝试过于频繁，请稍后再试'
-    })
-  }
-}
-
 export default defineEventHandler(async (event) => {
   const ip = clientIp(event)
-  checkRateLimit(ip)
+  checkLoginRateLimit(ip)
 
   const body = await readBody<LoginBody>(event)
   await verifyLoginVerification(event, body ?? {})

server/api/images/upload.post.ts

@@ -12,7 +12,12 @@ import {
 } from '../../utils/process-image-upload'
 import { createApiError } from '../../utils/api-error'
 import { checkUploadRateLimit } from '../../utils/rate-limit'
-import { parseTagIdsParam } from '../../utils/tags'
+import { readMultipartFormFieldValues } from '../../utils/multipart-form'
+import {
+  parseTagIdsParam,
+  parseTagNamesParam,
+  resolveUploadTagIds
+} from '../../utils/tags'
 
 export default defineEventHandler(async (event) => {
   await requireUploadAuth(event)
@@ -31,24 +36,15 @@ export default defineEventHandler(async (event) => {
   const source = verifyApiUploadToken(event) ? 'api' : 'web'
   const uploadUserId = await getUploadUserId(event)
 
-  const tagIdsField = formData.find(part => part.name === 'tagIds')
+  const tagIdsRaw = readMultipartFormFieldValues(formData, 'tagIds')
-  let uploadTagIds: number[] = []
+  const tagNamesRaw = readMultipartFormFieldValues(formData, 'tagNames')
-  if (tagIdsField?.data?.length) {
+  const uploadTagIdsInput = parseTagIdsParam(tagIdsRaw.length === 1 ? tagIdsRaw[0] : tagIdsRaw)
-    const raw = new TextDecoder().decode(tagIdsField.data).trim()
+  const uploadTagNames = parseTagNamesParam(tagNamesRaw.length === 1 ? tagNamesRaw[0] : tagNamesRaw)
-    try {
+  const resolvedTags = resolveUploadTagIds(uploadUserId, uploadTagIdsInput, uploadTagNames)
-      const parsed = JSON.parse(raw) as unknown
+  if ('message' in resolvedTags) {
-      uploadTagIds = parseTagIdsParam(parsed)
+    createApiError(event, 'INVALID_REQUEST', resolvedTags.message, 400)
-    } catch {
-      uploadTagIds = parseTagIdsParam(raw)
-    }
-  } else {
-    const repeatFields = formData.filter(part => part.name === 'tagIds' && part.data?.length)
-    if (repeatFields.length) {
-      uploadTagIds = parseTagIdsParam(
-        repeatFields.map(part => new TextDecoder().decode(part.data!).trim())
-      )
-    }
   }
+  const uploadTagIds = resolvedTags.tagIds
 
   // 兼容 image / file / files 字段名（图床脚本 / 通用客户端 / 网页多图）
   const fileParts = formData.filter(

server/api/settings/index.patch.ts

@@ -34,6 +34,16 @@ import {
   validateLoginVerificationSettings,
   validateSettingsDomainPatch
 } from '../../utils/env'
+import {
+  normalizeAllowedMimeTypes,
+  parseLoginRateMax,
+  parseLoginRateWindowMinutes,
+  parseUploadMaxFileSizeMb,
+  parseUploadRateIpMax,
+  parseUploadRateTokenMax,
+  parseUploadRateWindowMinutes,
+  setUploadPolicySettings
+} from '../../utils/upload-policy'
 
 interface SettingsPatchBody {
   webpQuality?: unknown
@@ -50,6 +60,14 @@ interface SettingsPatchBody {
   turnstileSecretKey?: unknown
   capApiEndpoint?: unknown
   capSecret?: unknown
+  uploadMaxFileSizeMb?: unknown
+  allowedMimeTypes?: unknown
+  uploadRateIpMax?: unknown
+  uploadRateTokenMax?: unknown
+  uploadRateWindowMinutes?: unknown
+  loginRateMax?: unknown
+  loginRateWindowMinutes?: unknown
+  preserveOriginalUpload?: unknown
 }
 
 export default defineEventHandler(async (event) => {
@@ -249,6 +267,72 @@ export default defineEventHandler(async (event) => {
     setSetting(SETTINGS_CAP_SECRET, nextCapSecret)
   }
 
+  if (body.uploadMaxFileSizeMb !== undefined) {
+    const mb = parseUploadMaxFileSizeMb(String(body.uploadMaxFileSizeMb))
+    if (mb === null) {
+      createApiError(event, 'INVALID_REQUEST', '单文件大小需为 1–100 MB 的整数', 400)
+    }
+    setUploadPolicySettings({ uploadMaxFileSizeMb: mb })
+  }
+
+  if (body.allowedMimeTypes !== undefined) {
+    const raw = Array.isArray(body.allowedMimeTypes)
+      ? body.allowedMimeTypes.map(item => String(item))
+      : String(body.allowedMimeTypes).split(',')
+    const normalized = normalizeAllowedMimeTypes(raw.join(','))
+    if (normalized.length === 0) {
+      createApiError(event, 'INVALID_REQUEST', '至少选择一种允许上传的图片格式', 400)
+    }
+    setUploadPolicySettings({ allowedMimeTypes: normalized })
+  }
+
+  if (body.uploadRateIpMax !== undefined) {
+    const value = parseUploadRateIpMax(String(body.uploadRateIpMax))
+    if (value === null) {
+      createApiError(event, 'INVALID_REQUEST', '上传 IP 限流次数无效', 400)
+    }
+    setUploadPolicySettings({ uploadRateIpMax: value })
+  }
+
+  if (body.uploadRateTokenMax !== undefined) {
+    const value = parseUploadRateTokenMax(String(body.uploadRateTokenMax))
+    if (value === null) {
+      createApiError(event, 'INVALID_REQUEST', '上传 Token 限流次数无效', 400)
+    }
+    setUploadPolicySettings({ uploadRateTokenMax: value })
+  }
+
+  if (body.uploadRateWindowMinutes !== undefined) {
+    const value = parseUploadRateWindowMinutes(String(body.uploadRateWindowMinutes))
+    if (value === null) {
+      createApiError(event, 'INVALID_REQUEST', '上传限流窗口无效', 400)
+    }
+    setUploadPolicySettings({ uploadRateWindowMinutes: value })
+  }
+
+  if (body.loginRateMax !== undefined) {
+    const value = parseLoginRateMax(String(body.loginRateMax))
+    if (value === null) {
+      createApiError(event, 'INVALID_REQUEST', '登录限流次数无效', 400)
+    }
+    setUploadPolicySettings({ loginRateMax: value })
+  }
+
+  if (body.loginRateWindowMinutes !== undefined) {
+    const value = parseLoginRateWindowMinutes(String(body.loginRateWindowMinutes))
+    if (value === null) {
+      createApiError(event, 'INVALID_REQUEST', '登录限流窗口无效', 400)
+    }
+    setUploadPolicySettings({ loginRateWindowMinutes: value })
+  }
+
+  if (body.preserveOriginalUpload !== undefined) {
+    if (typeof body.preserveOriginalUpload !== 'boolean') {
+      createApiError(event, 'INVALID_REQUEST', '保留原图设置无效', 400)
+    }
+    setUploadPolicySettings({ preserveOriginalUpload: body.preserveOriginalUpload })
+  }
+
   logActivity(event, {
     action: 'settings',
     key: 'settings/system',

server/utils/activity-log.smoke.test.ts

@@ -95,15 +95,17 @@ describe('activity log smoke', () => {
     await new Promise(resolve => setTimeout(resolve, 50))
   })
 
-  it('opens the project data database without throwing', async () => {
+  it('lists activity logs on a fresh database without throwing', async () => {
-    const projectData = join(process.cwd(), 'data')
+    useTempDataDir()
-    process.env.DATA_DIR = projectData
 
     const { getDb, listActivityLogs, closeDb } = await loadDbModule()
     getDb()
+    const { ensureStorageSchema } = await import('./storage-backends')
+    ensureStorageSchema()
+
     const result = listActivityLogs({ limit: 5, page: 1 })
-    expect(result.page).toBeGreaterThan(0)
+    expect(result.page).toBe(1)
-    expect(Array.isArray(result.items)).toBe(true)
+    expect(result.items).toEqual([])
     closeDb()
     await new Promise(resolve => setTimeout(resolve, 50))
   })

server/utils/env.ts

@@ -18,6 +18,7 @@ import {
   SETTINGS_CAP_SECRET,
   isAllowRegistration
 } from './db'
+import { getUploadPolicySettingsPayload } from './upload-policy'
 
 export function getRuntimeEnv(
   event: H3Event,
@@ -694,6 +695,7 @@ export function getSettingsPayload(event: H3Event) {
     capApiEndpoint: getCapApiEndpointConfigured(event),
     capSecret: getCapSecret(event),
     appVersion,
+    ...getUploadPolicySettingsPayload(),
     env: {
       webpQuality,
       refererConfigured: allowedRefererHosts.length > 0,

server/utils/host-isolation.test.ts

@@ -34,7 +34,8 @@ describe('shouldBlockImageHostRequest', () => {
       imageHost,
       requestHost: imageHost,
       method: 'GET',
-      pathname: '/settings'
+      pathname: '/settings',
+      hideFolder: false
     })).toBe(true)
   })
 
@@ -45,7 +46,8 @@ describe('shouldBlockImageHostRequest', () => {
       imageHost,
       requestHost: imageHost,
       method: 'GET',
-      pathname: '/images/2026/08/demo.webp'
+      pathname: '/images/2026/08/demo.webp',
+      hideFolder: false
     })).toBe(false)
   })
 
@@ -93,7 +95,8 @@ describe('shouldBlockSiteHostImageRequest', () => {
       siteHost,
       requestHost: siteHost,
       method: 'GET',
-      pathname: '/images/2026/08/demo.webp'
+      pathname: '/images/2026/08/demo.webp',
+      hideFolder: false
     })).toBe(true)
   })
 

server/utils/image-query.ts

@@ -1,5 +1,5 @@
 import { getStorageBackendRow } from './storage-backends'
-import { ALLOWED_MIME_TYPES } from './constants'
+import { getAllowedMimeTypesList } from './upload-policy'
 import { parseTagIdsParam, type TagFilterInput } from './tags'
 
 export function readBackendIdQuery(
@@ -15,7 +15,7 @@ export function readContentTypeQuery(
 ): string | undefined | null {
   const raw = typeof query.contentType === 'string' ? query.contentType.trim() : ''
   if (!raw || raw === 'all') return undefined
-  if (!(ALLOWED_MIME_TYPES as readonly string[]).includes(raw)) return null
+  if (!(getAllowedMimeTypesList() as readonly string[]).includes(raw)) return null
   return raw
 }
 

server/utils/multipart-form.ts

@@ -0,0 +1,30 @@
+import type { MultiPartData } from 'h3'
+
+export function readMultipartFormFieldValues(
+  formData: MultiPartData[],
+  fieldName: string
+): string[] {
+  const field = formData.find(part => part.name === fieldName)
+  if (field?.data?.length) {
+    const raw = new TextDecoder().decode(field.data).trim()
+    if (!raw) return []
+    try {
+      const parsed = JSON.parse(raw) as unknown
+      if (Array.isArray(parsed)) {
+        return parsed.map(item => String(item).trim()).filter(Boolean)
+      }
+    } catch {
+      // fall through to comma-separated parsing
+    }
+    return raw.split(',').map(item => item.trim()).filter(Boolean)
+  }
+
+  const repeatFields = formData.filter(
+    part => part.name === fieldName && part.data?.length
+  )
+  if (!repeatFields.length) return []
+
+  return repeatFields
+    .map(part => new TextDecoder().decode(part.data!).trim())
+    .filter(Boolean)
+}

server/utils/process-image-upload.ts

@@ -2,10 +2,6 @@ import sharp from 'sharp'
 import type { H3Event } from 'h3'
 import type { ImageItem, UploadErrorItem } from '~/types/image'
 import type { AllowedMimeType } from './constants'
-import {
-  ALLOWED_MIME_TYPES,
-  MAX_FILE_SIZE
-} from './constants'
 import {
   detectMimeFromSignature,
   isAllowedMimeType,
@@ -15,6 +11,12 @@ import type { LogSource } from './db'
 import { generateImageKey } from './image-key'
 import { buildImageItem, sanitizeOriginalName } from './image-response'
 import { getStorageLayout, getWebpQuality } from './env'
+import {
+  formatMaxFileSizeMessage,
+  getMaxFileSizeBytes,
+  isMimeTypeAllowed,
+  isPreserveOriginalUpload
+} from './upload-policy'
 import { logActivity } from './activity-log'
 import { attachTagsAfterUpload, getTagsForImageKeys } from './tags'
 import { putImage } from './storage'
@@ -71,13 +73,13 @@ export async function processSingleImageUpload(
   const originalName = sanitizeOriginalName(input.filename ?? 'image')
   const bytes = input.bytes
 
-  if (bytes.byteLength > MAX_FILE_SIZE) {
+  if (bytes.byteLength > getMaxFileSizeBytes()) {
     return {
       error: {
         name: originalName,
         error: {
           code: 'FILE_TOO_LARGE',
-          message: '图片大小不能超过 10 MB'
+          message: formatMaxFileSizeMessage()
         }
       }
     }
@@ -96,7 +98,7 @@ export async function processSingleImageUpload(
     }
   }
 
-  if (!ALLOWED_MIME_TYPES.includes(detectedMime)) {
+  if (!isMimeTypeAllowed(detectedMime)) {
     return {
       error: {
         name: originalName,
@@ -120,7 +122,9 @@ export async function processSingleImageUpload(
     }
   }
 
-  const compressed = await compressToWebp(bytes, detectedMime, getWebpQuality(event))
+  const compressed = isPreserveOriginalUpload()
+    ? { bytes, mime: detectedMime }
+    : await compressToWebp(bytes, detectedMime, getWebpQuality(event))
 
   const uploadedAt = new Date().toISOString()
   const layout = getStorageLayout(event)

server/utils/rate-limit.test.ts

@@ -1,6 +1,7 @@
 import { describe, expect, it, vi } from 'vitest'
 
 import { checkUploadRateLimit } from './rate-limit'
+import { getUploadRateLimitSettings } from './upload-policy'
 
 vi.mock('./logger', () => ({
   clientIp: (event: { __ip?: string }) => event.__ip ?? '127.0.0.1'
@@ -27,7 +28,8 @@ describe('checkUploadRateLimit', () => {
 
   it('limits repeated uploads by IP', () => {
     const event = mockEvent('10.0.0.3')
-    for (let i = 0; i < 60; i++) {
+    const { ipMax } = getUploadRateLimitSettings()
+    for (let i = 0; i < ipMax; i++) {
       checkUploadRateLimit(event)
     }
     expect(() => checkUploadRateLimit(event)).toThrow()
@@ -35,7 +37,8 @@ describe('checkUploadRateLimit', () => {
 
   it('limits repeated API token uploads', () => {
     const token = 'token-a'
-    for (let i = 0; i < 120; i++) {
+    const { tokenMax } = getUploadRateLimitSettings()
+    for (let i = 0; i < tokenMax; i++) {
       checkUploadRateLimit(mockEvent(`10.0.${i % 200}`), token)
     }
     expect(() => checkUploadRateLimit(mockEvent('10.0.250'), token)).toThrow()

server/utils/rate-limit.ts

@@ -1,10 +1,7 @@
 import { createHash } from 'node:crypto'
 import { createError, getHeader, type H3Event } from 'h3'
 import { clientIp } from './logger'
-
+import { getUploadRateLimitSettings, getLoginRateLimitSettings } from './upload-policy'
-const UPLOAD_IP_MAX = 60
-const UPLOAD_TOKEN_MAX = 120
-const UPLOAD_WINDOW_MS = 15 * 60 * 1000
 
 const stores = new Map<string, Map<string, { count: number, resetAt: number }>>()
 
@@ -43,12 +40,13 @@ function assertRateLimit(
 }
 
 export function checkUploadRateLimit(event: H3Event, apiToken?: string): void {
+  const { ipMax, tokenMax, windowMs } = getUploadRateLimitSettings()
   const ip = clientIp(event)
   assertRateLimit(
     'upload-ip',
     ip,
-    UPLOAD_IP_MAX,
+    ipMax,
-    UPLOAD_WINDOW_MS,
+    windowMs,
     '上传过于频繁，请稍后再试'
   )
 
@@ -60,8 +58,27 @@ export function checkUploadRateLimit(event: H3Event, apiToken?: string): void {
   assertRateLimit(
     'upload-token',
     hash,
-    UPLOAD_TOKEN_MAX,
+    tokenMax,
-    UPLOAD_WINDOW_MS,
+    windowMs,
     '上传过于频繁，请稍后再试'
   )
 }
+
+const loginAttempts = new Map<string, { count: number, resetAt: number }>()
+
+export function checkLoginRateLimit(ip: string): void {
+  const { max, windowMs } = getLoginRateLimitSettings()
+  const now = Date.now()
+  const entry = loginAttempts.get(ip)
+  if (!entry || now > entry.resetAt) {
+    loginAttempts.set(ip, { count: 1, resetAt: now + windowMs })
+    return
+  }
+  entry.count += 1
+  if (entry.count > max) {
+    throw createError({
+      statusCode: 429,
+      statusMessage: '登录尝试过于频繁，请稍后再试'
+    })
+  }
+}

server/utils/tags.test.ts

@@ -4,7 +4,9 @@ import {
   isValidTagColor,
   isValidTagName,
   normalizeTagName,
-  parseTagIdsParam
+  parseTagIdsParam,
+  parseTagNamesParam,
+  resolveUploadTagIds
 } from './tags'
 
 describe('normalizeTagName', () => {
@@ -51,6 +53,33 @@ describe('parseTagIdsParam', () => {
   })
 })
 
+describe('parseTagNamesParam', () => {
+  it('parses comma-separated and json array values', () => {
+    expect(parseTagNamesParam('博客, 截图')).toEqual(['博客', '截图'])
+    expect(parseTagNamesParam('["工作","截图"]')).toEqual(['工作', '截图'])
+    expect(parseTagNamesParam(['A', 'B'])).toEqual(['A', 'B'])
+  })
+
+  it('deduplicates normalized names', () => {
+    expect(parseTagNamesParam('博客, 博客 ,截图')).toEqual(['博客', '截图'])
+  })
+})
+
+describe('resolveUploadTagIds', () => {
+  it('returns empty when no tags requested', () => {
+    expect(resolveUploadTagIds(1, [], [])).toEqual({ tagIds: [] })
+  })
+
+  it('requires user when tags are requested', () => {
+    expect(resolveUploadTagIds(null, [1], [])).toMatchObject({
+      message: expect.stringContaining('API Token')
+    })
+    expect(resolveUploadTagIds(null, [], ['博客'])).toMatchObject({
+      message: expect.stringContaining('API Token')
+    })
+  })
+})
+
 describe('buildTagFilterSql', () => {
   it('returns empty sql without filter', () => {
     const params: Array<string | number> = []

server/utils/tags.ts

@@ -471,3 +471,91 @@ export function parseTagIdsParam(raw: unknown): number[] {
   }
   return [...new Set(ids)]
 }
+
+export function parseTagNamesParam(raw: unknown): string[] {
+  if (raw == null || raw === '') return []
+
+  let parts: string[]
+  if (Array.isArray(raw)) {
+    parts = raw.flatMap(item => String(item).split(','))
+  } else {
+    const str = String(raw).trim()
+    if (str.startsWith('[')) {
+      try {
+        const parsed = JSON.parse(str) as unknown
+        parts = Array.isArray(parsed)
+          ? parsed.map(item => String(item))
+          : str.split(',')
+      } catch {
+        parts = str.split(',')
+      }
+    } else {
+      parts = str.split(',')
+    }
+  }
+
+  const names: string[] = []
+  for (const part of parts) {
+    const normalized = normalizeTagName(part)
+    if (normalized) names.push(normalized)
+  }
+  return [...new Set(names)]
+}
+
+export function findOrCreateTagByName(userId: number, name: string): TagRow {
+  const normalized = normalizeTagName(name)
+  if (!isValidTagName(normalized)) {
+    throw new Error('INVALID_TAG_NAME')
+  }
+
+  const existing = findTagByName(userId, normalized)
+  if (existing) return existing
+
+  const created = createTag(userId, normalized)
+  const row = getTagById(created.id)
+  if (!row) {
+    throw new Error('TAG_CREATE_FAILED')
+  }
+  return row
+}
+
+export function resolveTagIdsFromNames(userId: number, names: readonly string[]): number[] {
+  const ids: number[] = []
+  for (const name of names) {
+    ids.push(findOrCreateTagByName(userId, name).id)
+  }
+  return [...new Set(ids)]
+}
+
+export function resolveUploadTagIds(
+  userId: number | null,
+  tagIds: number[],
+  tagNames: string[]
+): { tagIds: number[] } | { message: string } {
+  if (!tagIds.length && !tagNames.length) {
+    return { tagIds: [] }
+  }
+
+  if (userId == null) {
+    return {
+      message: '打标签需要登录或使用绑定用户的 API Token'
+    }
+  }
+
+  try {
+    const fromNames = tagNames.length ? resolveTagIdsFromNames(userId, tagNames) : []
+    return { tagIds: [...new Set([...tagIds, ...fromNames])] }
+  } catch (error) {
+    if (error instanceof Error) {
+      switch (error.message) {
+        case 'INVALID_TAG_NAME':
+          return { message: '标签名称无效' }
+        case 'TAG_LIMIT_REACHED':
+          return { message: '标签数量已达上限' }
+        default:
+          break
+      }
+    }
+    throw error
+  }
+}

server/utils/upload-policy.test.ts

@@ -0,0 +1,49 @@
+import { describe, expect, it } from 'vitest'
+
+import {
+  DEFAULT_UPLOAD_MAX_FILE_SIZE_MB,
+  normalizeAllowedMimeTypes,
+  parseLoginRateMax,
+  parsePreserveOriginalUpload,
+  parseUploadMaxFileSizeMb,
+  parseUploadRateIpMax,
+  serializeAllowedMimeTypes,
+  serializePreserveOriginalUpload
+} from './upload-policy'
+
+describe('upload-policy parsers', () => {
+  it('parses upload max file size mb', () => {
+    expect(parseUploadMaxFileSizeMb('10')).toBe(10)
+    expect(parseUploadMaxFileSizeMb('0')).toBeNull()
+    expect(parseUploadMaxFileSizeMb('101')).toBeNull()
+  })
+
+  it('normalizes allowed mime types', () => {
+    expect(normalizeAllowedMimeTypes('image/png, image/jpeg, image/png')).toEqual([
+      'image/png',
+      'image/jpeg'
+    ])
+    expect(normalizeAllowedMimeTypes('image/bmp')).toEqual([])
+  })
+
+  it('serializes allowed mime types in canonical order', () => {
+    expect(serializeAllowedMimeTypes(['image/webp', 'image/jpeg'])).toBe('image/jpeg,image/webp')
+  })
+
+  it('parses rate limit values', () => {
+    expect(parseUploadRateIpMax('60')).toBe(60)
+    expect(parseLoginRateMax('10')).toBe(10)
+    expect(parseUploadRateIpMax('0')).toBeNull()
+  })
+
+  it('defaults max file size mb constant matches legacy 10MB', () => {
+    expect(DEFAULT_UPLOAD_MAX_FILE_SIZE_MB).toBe(10)
+  })
+
+  it('parses preserve original upload flag', () => {
+    expect(parsePreserveOriginalUpload('true')).toBe(true)
+    expect(parsePreserveOriginalUpload('0')).toBe(false)
+    expect(parsePreserveOriginalUpload('')).toBeNull()
+    expect(serializePreserveOriginalUpload(true)).toBe('true')
+  })
+})

server/utils/upload-policy.ts

@@ -0,0 +1,347 @@
+import {
+  ALLOWED_MIME_TYPES,
+  type AllowedMimeType
+} from './constants'
+import { getSetting, setSetting } from './db'
+
+export const SETTINGS_UPLOAD_MAX_FILE_SIZE_MB = 'upload_max_file_size_mb'
+export const SETTINGS_ALLOWED_MIME_TYPES = 'allowed_mime_types'
+export const SETTINGS_UPLOAD_RATE_IP_MAX = 'upload_rate_ip_max'
+export const SETTINGS_UPLOAD_RATE_TOKEN_MAX = 'upload_rate_token_max'
+export const SETTINGS_UPLOAD_RATE_WINDOW_MINUTES = 'upload_rate_window_minutes'
+export const SETTINGS_LOGIN_RATE_MAX = 'login_rate_max'
+export const SETTINGS_LOGIN_RATE_WINDOW_MINUTES = 'login_rate_window_minutes'
+export const SETTINGS_PRESERVE_ORIGINAL_UPLOAD = 'preserve_original_upload'
+
+export const DEFAULT_UPLOAD_MAX_FILE_SIZE_MB = 10
+export const MIN_UPLOAD_MAX_FILE_SIZE_MB = 1
+export const MAX_UPLOAD_MAX_FILE_SIZE_MB = 100
+
+export const DEFAULT_UPLOAD_RATE_IP_MAX = 60
+export const DEFAULT_UPLOAD_RATE_TOKEN_MAX = 120
+export const DEFAULT_UPLOAD_RATE_WINDOW_MINUTES = 15
+export const MIN_UPLOAD_RATE_MAX = 1
+export const MAX_UPLOAD_RATE_IP_MAX = 1000
+export const MAX_UPLOAD_RATE_TOKEN_MAX = 5000
+export const MIN_RATE_WINDOW_MINUTES = 1
+export const MAX_RATE_WINDOW_MINUTES = 1440
+
+export const DEFAULT_LOGIN_RATE_MAX = 10
+export const DEFAULT_LOGIN_RATE_WINDOW_MINUTES = 15
+export const MAX_LOGIN_RATE_MAX = 100
+
+export const ALL_MIME_TYPE_OPTIONS = [
+  { mime: 'image/jpeg', label: 'JPEG' },
+  { mime: 'image/png', label: 'PNG' },
+  { mime: 'image/webp', label: 'WebP' },
+  { mime: 'image/gif', label: 'GIF' },
+  { mime: 'image/svg+xml', label: 'SVG' },
+  { mime: 'image/x-icon', label: 'ICO' }
+] as const satisfies ReadonlyArray<{ mime: AllowedMimeType, label: string }>
+
+export type PolicySource = 'env' | 'db' | 'default'
+
+function readEnv(name: string): string {
+  try {
+    return process.env[name]?.trim() ?? ''
+  } catch {
+    return ''
+  }
+}
+
+function parsePositiveInt(raw: string, min: number, max: number): number | null {
+  const trimmed = raw.trim()
+  if (!trimmed) return null
+  const value = Number(trimmed)
+  if (!Number.isFinite(value) || !Number.isInteger(value)) return null
+  if (value < min || value > max) return null
+  return value
+}
+
+export function parseUploadMaxFileSizeMb(raw: string): number | null {
+  return parsePositiveInt(raw, MIN_UPLOAD_MAX_FILE_SIZE_MB, MAX_UPLOAD_MAX_FILE_SIZE_MB)
+}
+
+export function parseUploadRateIpMax(raw: string): number | null {
+  return parsePositiveInt(raw, MIN_UPLOAD_RATE_MAX, MAX_UPLOAD_RATE_IP_MAX)
+}
+
+export function parseUploadRateTokenMax(raw: string): number | null {
+  return parsePositiveInt(raw, MIN_UPLOAD_RATE_MAX, MAX_UPLOAD_RATE_TOKEN_MAX)
+}
+
+export function parseUploadRateWindowMinutes(raw: string): number | null {
+  return parsePositiveInt(raw, MIN_RATE_WINDOW_MINUTES, MAX_RATE_WINDOW_MINUTES)
+}
+
+export function parseLoginRateMax(raw: string): number | null {
+  return parsePositiveInt(raw, MIN_UPLOAD_RATE_MAX, MAX_LOGIN_RATE_MAX)
+}
+
+export function parseLoginRateWindowMinutes(raw: string): number | null {
+  return parsePositiveInt(raw, MIN_RATE_WINDOW_MINUTES, MAX_RATE_WINDOW_MINUTES)
+}
+
+export function parsePreserveOriginalUpload(raw: string): boolean | null {
+  const trimmed = raw.trim().toLowerCase()
+  if (!trimmed) return null
+  if (trimmed === 'true' || trimmed === '1' || trimmed === 'yes') return true
+  if (trimmed === 'false' || trimmed === '0' || trimmed === 'no') return false
+  return null
+}
+
+export function serializePreserveOriginalUpload(value: boolean): string {
+  return value ? 'true' : 'false'
+}
+
+export function normalizeAllowedMimeTypes(raw: string): AllowedMimeType[] {
+  const allowedSet = new Set<string>(ALLOWED_MIME_TYPES)
+  const seen = new Set<string>()
+  const result: AllowedMimeType[] = []
+
+  for (const part of raw.split(',')) {
+    const mime = part.trim().toLowerCase()
+    if (!mime || seen.has(mime) || !allowedSet.has(mime)) continue
+    seen.add(mime)
+    result.push(mime as AllowedMimeType)
+  }
+
+  return result
+}
+
+export function serializeAllowedMimeTypes(mimes: readonly string[]): string {
+  const normalized = new Set(normalizeAllowedMimeTypes(mimes.join(',')))
+  return ALL_MIME_TYPE_OPTIONS
+    .map(option => option.mime)
+    .filter(mime => normalized.has(mime))
+    .join(',')
+}
+
+function getUploadMaxFileSizeMbSource(): PolicySource {
+  if (getSetting(SETTINGS_UPLOAD_MAX_FILE_SIZE_MB) !== null) return 'db'
+  if (parseUploadMaxFileSizeMb(readEnv('UPLOAD_MAX_FILE_SIZE_MB')) !== null) return 'env'
+  return 'default'
+}
+
+function getAllowedMimeTypesSource(): PolicySource {
+  if (getSetting(SETTINGS_ALLOWED_MIME_TYPES) !== null) return 'db'
+  if (normalizeAllowedMimeTypes(readEnv('ALLOWED_MIME_TYPES')).length > 0) return 'env'
+  return 'default'
+}
+
+function getUploadRateIpMaxSource(): PolicySource {
+  if (getSetting(SETTINGS_UPLOAD_RATE_IP_MAX) !== null) return 'db'
+  if (parseUploadRateIpMax(readEnv('UPLOAD_RATE_IP_MAX')) !== null) return 'env'
+  return 'default'
+}
+
+function getUploadRateTokenMaxSource(): PolicySource {
+  if (getSetting(SETTINGS_UPLOAD_RATE_TOKEN_MAX) !== null) return 'db'
+  if (parseUploadRateTokenMax(readEnv('UPLOAD_RATE_TOKEN_MAX')) !== null) return 'env'
+  return 'default'
+}
+
+function getUploadRateWindowMinutesSource(): PolicySource {
+  if (getSetting(SETTINGS_UPLOAD_RATE_WINDOW_MINUTES) !== null) return 'db'
+  if (parseUploadRateWindowMinutes(readEnv('UPLOAD_RATE_WINDOW_MINUTES')) !== null) return 'env'
+  return 'default'
+}
+
+function getLoginRateMaxSource(): PolicySource {
+  if (getSetting(SETTINGS_LOGIN_RATE_MAX) !== null) return 'db'
+  if (parseLoginRateMax(readEnv('LOGIN_RATE_MAX')) !== null) return 'env'
+  return 'default'
+}
+
+function getLoginRateWindowMinutesSource(): PolicySource {
+  if (getSetting(SETTINGS_LOGIN_RATE_WINDOW_MINUTES) !== null) return 'db'
+  if (parseLoginRateWindowMinutes(readEnv('LOGIN_RATE_WINDOW_MINUTES')) !== null) return 'env'
+  return 'default'
+}
+
+function getPreserveOriginalUploadSource(): PolicySource {
+  if (getSetting(SETTINGS_PRESERVE_ORIGINAL_UPLOAD) !== null) return 'db'
+  if (parsePreserveOriginalUpload(readEnv('PRESERVE_ORIGINAL_UPLOAD')) !== null) return 'env'
+  return 'default'
+}
+
+export function getUploadMaxFileSizeMb(): number {
+  const dbRaw = getSetting(SETTINGS_UPLOAD_MAX_FILE_SIZE_MB)
+  if (dbRaw !== null) {
+    const parsed = parseUploadMaxFileSizeMb(dbRaw)
+    if (parsed !== null) return parsed
+  }
+  const fromEnv = parseUploadMaxFileSizeMb(readEnv('UPLOAD_MAX_FILE_SIZE_MB'))
+  if (fromEnv !== null) return fromEnv
+  return DEFAULT_UPLOAD_MAX_FILE_SIZE_MB
+}
+
+export function getMaxFileSizeBytes(): number {
+  return getUploadMaxFileSizeMb() * 1024 * 1024
+}
+
+export function getAllowedMimeTypesList(): AllowedMimeType[] {
+  const dbRaw = getSetting(SETTINGS_ALLOWED_MIME_TYPES)
+  if (dbRaw !== null) {
+    const parsed = normalizeAllowedMimeTypes(dbRaw)
+    if (parsed.length > 0) return parsed
+  }
+  const fromEnv = normalizeAllowedMimeTypes(readEnv('ALLOWED_MIME_TYPES'))
+  if (fromEnv.length > 0) return fromEnv
+  return [...ALLOWED_MIME_TYPES]
+}
+
+export function isMimeTypeAllowed(mime: string): mime is AllowedMimeType {
+  return getAllowedMimeTypesList().includes(mime as AllowedMimeType)
+}
+
+export function isPreserveOriginalUpload(): boolean {
+  const dbRaw = getSetting(SETTINGS_PRESERVE_ORIGINAL_UPLOAD)
+  if (dbRaw !== null) {
+    const parsed = parsePreserveOriginalUpload(dbRaw)
+    if (parsed !== null) return parsed
+  }
+  const fromEnv = parsePreserveOriginalUpload(readEnv('PRESERVE_ORIGINAL_UPLOAD'))
+  if (fromEnv !== null) return fromEnv
+  return false
+}
+
+export function getUploadRateLimitSettings(): {
+  ipMax: number
+  tokenMax: number
+  windowMs: number
+} {
+  const ipMax = (() => {
+    const dbRaw = getSetting(SETTINGS_UPLOAD_RATE_IP_MAX)
+    if (dbRaw !== null) {
+      const parsed = parseUploadRateIpMax(dbRaw)
+      if (parsed !== null) return parsed
+    }
+    return parseUploadRateIpMax(readEnv('UPLOAD_RATE_IP_MAX')) ?? DEFAULT_UPLOAD_RATE_IP_MAX
+  })()
+
+  const tokenMax = (() => {
+    const dbRaw = getSetting(SETTINGS_UPLOAD_RATE_TOKEN_MAX)
+    if (dbRaw !== null) {
+      const parsed = parseUploadRateTokenMax(dbRaw)
+      if (parsed !== null) return parsed
+    }
+    return parseUploadRateTokenMax(readEnv('UPLOAD_RATE_TOKEN_MAX')) ?? DEFAULT_UPLOAD_RATE_TOKEN_MAX
+  })()
+
+  const windowMinutes = (() => {
+    const dbRaw = getSetting(SETTINGS_UPLOAD_RATE_WINDOW_MINUTES)
+    if (dbRaw !== null) {
+      const parsed = parseUploadRateWindowMinutes(dbRaw)
+      if (parsed !== null) return parsed
+    }
+    return parseUploadRateWindowMinutes(readEnv('UPLOAD_RATE_WINDOW_MINUTES'))
+      ?? DEFAULT_UPLOAD_RATE_WINDOW_MINUTES
+  })()
+
+  return {
+    ipMax,
+    tokenMax,
+    windowMs: windowMinutes * 60 * 1000
+  }
+}
+
+export function getLoginRateLimitSettings(): {
+  max: number
+  windowMs: number
+} {
+  const max = (() => {
+    const dbRaw = getSetting(SETTINGS_LOGIN_RATE_MAX)
+    if (dbRaw !== null) {
+      const parsed = parseLoginRateMax(dbRaw)
+      if (parsed !== null) return parsed
+    }
+    return parseLoginRateMax(readEnv('LOGIN_RATE_MAX')) ?? DEFAULT_LOGIN_RATE_MAX
+  })()
+
+  const windowMinutes = (() => {
+    const dbRaw = getSetting(SETTINGS_LOGIN_RATE_WINDOW_MINUTES)
+    if (dbRaw !== null) {
+      const parsed = parseLoginRateWindowMinutes(dbRaw)
+      if (parsed !== null) return parsed
+    }
+    return parseLoginRateWindowMinutes(readEnv('LOGIN_RATE_WINDOW_MINUTES'))
+      ?? DEFAULT_LOGIN_RATE_WINDOW_MINUTES
+  })()
+
+  return {
+    max,
+    windowMs: windowMinutes * 60 * 1000
+  }
+}
+
+export function formatMaxFileSizeMessage(): string {
+  return `图片大小不能超过 ${getUploadMaxFileSizeMb()} MB`
+}
+
+export function getUploadPolicySettingsPayload() {
+  return {
+    uploadMaxFileSizeMb: getUploadMaxFileSizeMb(),
+    uploadMaxFileSizeMbSource: getUploadMaxFileSizeMbSource(),
+    uploadMaxFileSizeMbEnvFallback: parseUploadMaxFileSizeMb(readEnv('UPLOAD_MAX_FILE_SIZE_MB'))
+      ?? DEFAULT_UPLOAD_MAX_FILE_SIZE_MB,
+    allowedMimeTypes: getAllowedMimeTypesList(),
+    allowedMimeTypesSource: getAllowedMimeTypesSource(),
+    allowedMimeTypesEnvFallback: normalizeAllowedMimeTypes(readEnv('ALLOWED_MIME_TYPES')),
+    uploadRateIpMax: getUploadRateLimitSettings().ipMax,
+    uploadRateIpMaxSource: getUploadRateIpMaxSource(),
+    uploadRateTokenMax: getUploadRateLimitSettings().tokenMax,
+    uploadRateTokenMaxSource: getUploadRateTokenMaxSource(),
+    uploadRateWindowMinutes: getUploadRateLimitSettings().windowMs / (60 * 1000),
+    uploadRateWindowMinutesSource: getUploadRateWindowMinutesSource(),
+    loginRateMax: getLoginRateLimitSettings().max,
+    loginRateMaxSource: getLoginRateMaxSource(),
+    loginRateWindowMinutes: getLoginRateLimitSettings().windowMs / (60 * 1000),
+    loginRateWindowMinutesSource: getLoginRateWindowMinutesSource(),
+    preserveOriginalUpload: isPreserveOriginalUpload(),
+    preserveOriginalUploadSource: getPreserveOriginalUploadSource(),
+    mimeTypeOptions: ALL_MIME_TYPE_OPTIONS.map(option => ({
+      mime: option.mime,
+      label: option.label
+    }))
+  }
+}
+
+export function setUploadPolicySettings(input: {
+  uploadMaxFileSizeMb?: number
+  allowedMimeTypes?: readonly string[]
+  uploadRateIpMax?: number
+  uploadRateTokenMax?: number
+  uploadRateWindowMinutes?: number
+  loginRateMax?: number
+  loginRateWindowMinutes?: number
+  preserveOriginalUpload?: boolean
+}): void {
+  if (input.uploadMaxFileSizeMb !== undefined) {
+    setSetting(SETTINGS_UPLOAD_MAX_FILE_SIZE_MB, String(input.uploadMaxFileSizeMb))
+  }
+  if (input.allowedMimeTypes !== undefined) {
+    setSetting(SETTINGS_ALLOWED_MIME_TYPES, serializeAllowedMimeTypes(input.allowedMimeTypes))
+  }
+  if (input.uploadRateIpMax !== undefined) {
+    setSetting(SETTINGS_UPLOAD_RATE_IP_MAX, String(input.uploadRateIpMax))
+  }
+  if (input.uploadRateTokenMax !== undefined) {
+    setSetting(SETTINGS_UPLOAD_RATE_TOKEN_MAX, String(input.uploadRateTokenMax))
+  }
+  if (input.uploadRateWindowMinutes !== undefined) {
+    setSetting(SETTINGS_UPLOAD_RATE_WINDOW_MINUTES, String(input.uploadRateWindowMinutes))
+  }
+  if (input.loginRateMax !== undefined) {
+    setSetting(SETTINGS_LOGIN_RATE_MAX, String(input.loginRateMax))
+  }
+  if (input.loginRateWindowMinutes !== undefined) {
+    setSetting(SETTINGS_LOGIN_RATE_WINDOW_MINUTES, String(input.loginRateWindowMinutes))
+  }
+  if (input.preserveOriginalUpload !== undefined) {
+    setSetting(
+      SETTINGS_PRESERVE_ORIGINAL_UPLOAD,
+      serializePreserveOriginalUpload(input.preserveOriginalUpload)
+    )
+  }
+}