refactor(web): 下载盘、RSS、订阅、设置与待处理的剩余去噪项(DEAI-2)

- 下载面板:下载盘只显示「已用 x / 总量」与进度条,暂停线 / 在途 / 预留 / 可清理 / 做种保留收进详情;
  阈值文案统一「暂停线 / 恢复线 / 下载盘满暂停」
- RSS 页去掉与站点页重复的站点表,节标题「RSS 地址」;用途只在非通用时显示
- 订阅:一条都没有时不铺筛选;表单里「空 = 24;0 = 关」等等式改成 placeholder + 一句说明
- 设置:浏览器服务、元数据识别、MCP 说明去掉组件名与实现细节;会话目录与 fake 脚本只在开发构建显示;
  API Key scope 前加中文名;命名模板变量去掉「MP 无」
- 待处理顶部计数卡改成一行筛选按钮
- 智能体悬浮按钮只在没有侧栏的窄屏出现,抽屉打开时不再显示「收起」胶囊

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/components/settings/api-keys.tsx

@@ -25,10 +25,10 @@ import { SettingsBlock } from "./settings-block.tsx";
 // ─── API Key ───
 
 const SCOPES: { value: ApiScope; label: string; hint: string }[] = [
-  { value: "read", label: "read", hint: "只读查询全部数据" },
-  { value: "organize.read", label: "organize.read", hint: "只读整理记录，供外部增量同步" },
-  { value: "organize.execute", label: "organize.execute", hint: "发起整理" },
-  { value: "admin", label: "admin", hint: "全部管理权限，含改设置" },
+  { value: "read", label: "只读 · read", hint: "只读查询全部数据" },
+  { value: "organize.read", label: "读整理记录 · organize.read", hint: "只读整理记录，供外部增量同步" },
+  { value: "organize.execute", label: "执行整理 · organize.execute", hint: "发起整理" },
+  { value: "admin", label: "管理员 · admin", hint: "全部管理权限，含改设置" },
 ];
 
 function CreatedKeyDialog({ plaintext, onClose }: { plaintext: string | null; onClose: () => void }) {
@@ -200,7 +200,7 @@ export function ApiKeysSection() {
                         checked={on}
                         onChange={() => setScopes((xs) => (on ? xs.filter((x) => x !== s.value) : [...xs, s.value]))}
                       />
-                      <code className="text-caption">{s.label}</code>
+                      <span className="text-caption">{s.label}</span>
                       <span className="text-meta text-muted-foreground">{s.hint}</span>
                     </label>
                   );
@@ -250,7 +250,7 @@ function ScopeLegend() {
       {SCOPES.map((s) => (
         <div key={s.value} className="contents">
           <dt>
-            <code className="rounded-tight bg-foreground/[0.06] px-1.5 py-0.5">{s.label}</code>
+            <span className="rounded-tight bg-foreground/[0.06] px-1.5 py-0.5">{s.label}</span>
           </dt>
           <dd className="text-muted-foreground">{s.hint}</dd>
         </div>