feat: clarify image generation output controls

src/admin/AdminNav.tsx

@@ -37,7 +37,7 @@ const NAV_SECTIONS: NavSection[] = [
       { to: '/skills', label: '技能' },
       { to: '/policies', label: '策略' },
       { to: '/providers', label: '统一模型中心' },
-      { to: '/asset-gateway', label: '资产能力' },
+      { to: '/asset-gateway', label: '图片生成' },
       { to: '/blocked-words', label: '违禁词管理' },
     ],
   },

src/admin/pages/AssetGatewayPage.tsx

@@ -41,6 +41,11 @@ export function AssetGatewayPage() {
   const [message, setMessage] = useState<string | null>(null);
   const [error, setError] = useState<string | null>(null);
   const activeKeys = useMemo(() => keys.filter((key) => key.status === 'active'), [keys]);
+  const orderedPlugins = useMemo(() => config?.plugins.slice().sort((left, right) => {
+    if (left.pluginId === 'asset-generate') return -1;
+    if (right.pluginId === 'asset-generate') return 1;
+    return left.pluginId.localeCompare(right.pluginId);
+  }) ?? [], [config]);
 
   const load = useCallback(async () => {
     setLoading(true);
@@ -108,16 +113,16 @@ export function AssetGatewayPage() {
   return (
     <div className="admin-page">
       <div className="admin-page-head">
-        <h2>资产能力</h2>
+        <h2>图片生成</h2>
-        <p className="muted">可插拔图片、素材与处理能力。默认关闭，不会影响现有聊天或页面生成流程。</p>
+        <p className="muted">分别控制正文图片、页面头图、卡片封面和信息流缩略图；未勾选的 AI 图片项不会执行。</p>
       </div>
       {error && <p className="banner banner-error">{error}</p>}
       {message && <p className="banner banner-success">{message}</p>}
       <section className="asset-gateway-hero">
         <div>
           <div className="asset-kicker">OPTIONAL CAPABILITY</div>
-          <h3>资产能力 Gateway</h3>
+          <h3>图片与素材能力总开关</h3>
-          <p>关闭时所有调用自动降级为现有流程；配置保留，现有聊天和页面生成不受影响。</p>
+          <p>关闭时不调用图片模型；页面仍保留现有无图样式和基础缩略图流程。</p>
         </div>
         <label className="asset-toggle">
           <input type="checkbox" checked={config.enabled} disabled={busy === 'global'} onChange={(event) => void saveGlobal(event.target.checked)} />
@@ -125,7 +130,7 @@ export function AssetGatewayPage() {
         </label>
       </section>
       <div className="asset-plugin-grid asset-plugin-grid--balanced">
-      {config.plugins.map((plugin) => {
+      {orderedPlugins.map((plugin) => {
         const draft = drafts[plugin.pluginId] ?? draftFromPlugin(plugin);
         const selectedKey = activeKeys.find((key) => key.id === draft.llmProviderKeyId);
         const visual = pluginVisuals[plugin.pluginId] ?? { icon: '✦', accent: 'blue' };
@@ -165,7 +170,7 @@ export function AssetGatewayPage() {
             </> : <div className="asset-no-llm">确定性处理 · 不调用 LLM</div>}
             {plugin.pluginId === 'asset-generate' && plugin.purposeCatalog?.length ? (
               <fieldset className="asset-purpose-fieldset" disabled={!draft.enabled || draft.provider !== 'image_make'}>
-                <legend>image_make 生效范围</legend>
+                <legend>AI 图片输出项</legend>
                 <div className="asset-purpose-grid">
                   {plugin.purposeCatalog.map((purpose) => (
                     <label key={purpose.id}>
@@ -174,11 +179,14 @@ export function AssetGatewayPage() {
                         checked={Boolean(draft.purposes[purpose.id])}
                         onChange={(event) => updatePurpose(plugin.pluginId, purpose.id, event.target.checked)}
                       />
-                      <span>{purpose.label}<small>{purpose.presetId}</small></span>
+                      <span>
+                        {purpose.label}
+                        <small>{purpose.strategy === 'derive' ? '从页面头图派生 · 不重复生图' : purpose.presetId}</small>
+                      </span>
                     </label>
                   ))}
                 </div>
-                <p>信息流缩略图仍由 MindSpace 从封面源图派生，不会重复调用生图模型。</p>
+                <p>页面头图最多生成一次；卡片封面和信息流缩略图复用同一张主图裁剪。关闭某项后，该位置不使用 AI 图片；基础页面缩略图仍保留。</p>
               </fieldset>
             ) : null}
           </div>

src/admin/pages/DashboardPage.tsx

@@ -9,7 +9,7 @@ const QUICK_LINKS = [
   { to: '/users', label: '用户管理', desc: '创建账号、启用禁用' },
   { to: '/billing/recharge', label: '充值', desc: '为用户账户充值' },
   { to: '/providers', label: '统一模型中心', desc: 'Provider、执行器模型与启动控制' },
-  { to: '/asset-gateway', label: '资产能力', desc: '可插拔素材插件、Provider 与专属 LLM 选择' },
+  { to: '/asset-gateway', label: '图片生成', desc: '配置正文图、页面头图、卡片封面与信息流缩略图' },
   { to: '/mindspace', label: 'MindSpace 配置', desc: '公开页上限与空间发布参数' },
   { to: '/memory-v2', label: 'Memory V2', desc: '长期记忆 backend 与前置路由开关' },
   { to: '/skill-runtime', label: 'Skill Runtime', desc: 'H5 manifest 关键词路由开关' },

src/index.css

@@ -1111,6 +1111,11 @@ body,
   line-height: 1.45;
 }
 
+.asset-purpose-grid small {
+  color: var(--color-text-muted);
+  line-height: 1.35;
+}
+
 .asset-purpose-grid {
   display: grid;
   grid-template-columns: repeat(2, minmax(0, 1fr));

src/types.ts

@@ -213,6 +213,8 @@ export type AssetPluginConfig = {
     id: string;
     label: string;
     presetId: string;
+    strategy?: 'generate' | 'derive';
+    sourcePurpose?: string | null;
   }>;
 };