feat(distribution): 分站可下调收号比例且不超过主站上限

让分销站能按自身能力下调收号比例扩大利润，同时把主站回收比例作为硬边界，避免分站把比例加得比主站更高。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/features/seller/composables/usePublishForm.ts

@@ -34,6 +34,7 @@ import {
 import type { PublishForm } from '@/shared/types/publish'
 import { yuanToCent } from '@/shared/utils/money'
 import { dailyLossOptions, formatNumber, roundRatio } from '@/shared/utils/pricing'
+import { useDistributionSiteStore } from '@/stores/distributionSite'
 
 const draftSaveDelay = 400
 const multiScreenshotLimit = 3
@@ -54,6 +55,9 @@ interface UsePublishFormOptions {
 export function usePublishForm(options: UsePublishFormOptions) {
   const router = useRouter()
   const route = useRoute()
+  const siteStore = useDistributionSiteStore()
+  const isDistribution = computed(() => siteStore.isDistribution)
+  const receiveRatioDelta = computed(() => Number(siteStore.receiveRatioDelta || 0))
   const loading = ref(false)
   const uploading = ref(false)
   const suppressDraftSave = ref(false)
@@ -89,6 +93,8 @@ export function usePublishForm(options: UsePublishFormOptions) {
     quantityModes,
     screenshotFiles,
     selectedSkins,
+    isDistribution,
+    receiveRatioDelta,
   })
 
   // ========== 上号方式互斥 ==========
@@ -911,6 +917,7 @@ export function usePublishForm(options: UsePublishFormOptions) {
 
   return {
     ...pricing,
+    isDistribution,
     dailyLossOptions,
     formatNumber,
     router,

frontend/src/features/seller/views/MobileSellerListingCreateView.css

@@ -692,6 +692,14 @@
   line-height: 1.5;
 }
 
+.ratio-inherit-hint {
+  margin: 0;
+  color: #1677ff;
+  font-size: 11px;
+  font-weight: 700;
+  line-height: 1.5;
+}
+
 .ratio-mode-grid {
   display: grid;
   grid-template-columns: repeat(2, minmax(0, 1fr));

frontend/src/features/seller/views/MobileSellerListingCreateView.vue

@@ -49,6 +49,7 @@ const {
   priceConfig,
   fireLevelPlaceholder,
   dailyLossMAmount,
+  isDistribution,
   calculatedDefaultSaleRatio,
   maxAcceleratedSaleRatio,
   calculatedCoinBasePrice,
@@ -694,11 +695,16 @@ const screenshotGuides: Record<string, string> = {
         </p>
         <div class="ratio-panel">
           <div class="ratio-reference">
-            <span>参考比例</span>
+            <span>{{ isDistribution ? '主站收号上限' : '参考比例' }}</span>
             <strong>{{ calculatedDefaultSaleRatioText }}</strong>
           </div>
-          <p class="ratio-range">{{ saleRatioRangeText }}，比例越高出租速度越快，自行选择。</p>
-          <div class="ratio-mode-grid">
+          <p v-if="isDistribution" class="ratio-inherit-hint">
+            本站可下调收号比例换取更高利润，但不能高于主站比例。当前按站点配置计算。
+          </p>
+          <p class="ratio-range">
+            {{ saleRatioRangeText }}{{ isDistribution ? '。' : '，比例越高出租速度越快，自行选择。' }}
+          </p>
+          <div v-if="!isDistribution" class="ratio-mode-grid">
             <button
               type="button"
               class="ratio-mode-btn"

frontend/src/features/seller/views/SellerListingCreateView.css

@@ -675,6 +675,12 @@
   line-height: 1.5;
 }
 
+.ratio-inherit-hint {
+  margin: 8px 0 0 !important;
+  color: #1677ff !important;
+  font-weight: 600;
+}
+
 .ratio-reference {
   display: flex;
   align-items: center;

frontend/src/features/seller/views/SellerListingCreateView.vue

@@ -67,6 +67,7 @@ const {
   recommendedDepositAmount,
   depositBreakdownItems,
   publishTitle,
+  isDistribution,
   hasAcceleratedSaleRatioInput,
   isQuantityItemDisabled,
   handleSaveDraft,
@@ -557,11 +558,14 @@ function selectDailyLoss(value: string | number) {
 
           <div class="ratio-panel">
             <div class="ratio-reference">
-              <span>参考比例</span>
+              <span>{{ isDistribution ? '主站收号上限' : '参考比例' }}</span>
               <strong>{{ calculatedDefaultSaleRatioText }}</strong>
             </div>
-            <p>{{ saleRatioRangeText }}，比例越高出租速度越快。</p>
-            <div class="ratio-mode-grid">
+            <p v-if="isDistribution" class="ratio-inherit-hint">
+              本站可下调收号比例换取更高利润，但不能高于主站比例。当前按站点配置计算。
+            </p>
+            <p>{{ saleRatioRangeText }}{{ isDistribution ? '。' : '，比例越高出租速度越快。' }}</p>
+            <div v-if="!isDistribution" class="ratio-mode-grid">
               <button
                 type="button"
                 class="ratio-mode-btn"