feat(web): make the site workbench the home of sites

- 站点工作台: 登记站点 dialog (built-in site definitions or custom).
- Site detail tabs: 整理视图 / 原站视图 / 快照与 Feed / 账号 (account list +
  credential form).
- 来源健康 (was 来源/Feed/快照): cross-site health table + all feeds; site
  names deep-link to the site's 快照与 Feed tab. Feed table extracted to
  components/workbench/feed-table.tsx.

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

apps/web/app/routes/console/sites.$siteId.tsx

@@ -1,18 +1,21 @@
 import type { ResolutionStatus, WorkbenchRelease } from "@umt/contracts";
-import { ArrowLeft, Bot, Camera, Globe, Radar, SearchX, TriangleAlert } from "lucide-react";
+import { ArrowLeft, Bot, Camera, Globe, Plus, Radar, SearchX, TriangleAlert } from "lucide-react";
 import { useEffect, useMemo, useState } from "react";
-import { Link, useParams } from "react-router";
+import { Link, useParams, useSearchParams } from "react-router";
 import { toast } from "sonner";
 import { useInventory } from "~/api/inventory.ts";
 import { type ReleaseFilters, useSiteReleases } from "~/api/releases.ts";
 import { snapshotStale, useSite, useSiteAccounts, useSnapshotSite } from "~/api/sites.ts";
 import { openAgentDrawer } from "~/components/agent/agent-store.ts";
+import { DetailSection } from "~/components/console/detail-sheet.tsx";
 import { EmptyState, ErrorState, LoadingState } from "~/components/console/empty-state.tsx";
 import { FilterBar, FilterSelect } from "~/components/console/filter-bar.tsx";
+import { consolePath } from "~/components/console/nav.ts";
 import { PageHeader } from "~/components/console/page-header.tsx";
 import { StatusBadge } from "~/components/console/status-badge.tsx";
 import { Button } from "~/components/ui/button.tsx";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "~/components/ui/tabs.tsx";
+import { FeedTable } from "~/components/workbench/feed-table.tsx";
 import { ReleaseDetailSheet } from "~/components/workbench/release-detail-sheet.tsx";
 import {
   accountSummary,
@@ -24,6 +27,8 @@ import {
   SITE_HEALTH,
 } from "~/components/workbench/release-fields.ts";
 import { ReleaseRow } from "~/components/workbench/release-list.tsx";
+import { SiteAccountsPanel } from "~/components/workbench/site-accounts.tsx";
+import { SnapshotPanel } from "~/components/workbench/snapshot-panel.tsx";
 import { errorMessage } from "~/lib/api.ts";
 
 const PROMOS = [
@@ -84,8 +89,16 @@ function useDebounced<T>(value: T, ms = 400) {
   return v;
 }
 
+const TABS = ["organized", "origin", "snapshots", "accounts"] as const;
+
+export const meta = () => [{ title: "站点 · UHD 媒体自动化控制台" }];
+
 export default function SiteWorkbenchPage() {
   const { siteId = "" } = useParams();
+  const [params, setParams] = useSearchParams();
+  const rawTab = params.get("tab") ?? "";
+  const tab = (TABS as readonly string[]).includes(rawTab) ? rawTab : "organized";
+  const [creatingFeed, setCreatingFeed] = useState(false);
   const site = useSite(siteId);
   const accounts = useSiteAccounts(siteId);
   const snap = useSnapshotSite();
@@ -169,9 +182,9 @@ export default function SiteWorkbenchPage() {
         actions={
           <>
             <Button asChild variant="ghost" size="sm">
-              <Link to="/console/sites">
+              <Link to={consolePath("sites")}>
                 <ArrowLeft />
-                站点
+                站点工作台
               </Link>
             </Button>
             <Button
@@ -185,10 +198,24 @@ export default function SiteWorkbenchPage() {
         }
       />
 
-      <Tabs defaultValue="organized">
-        <TabsList>
+      <Tabs
+        value={tab}
+        onValueChange={(v) =>
+          setParams(
+            (p) => {
+              if (v === "organized") p.delete("tab");
+              else p.set("tab", v);
+              return p;
+            },
+            { replace: true },
+          )
+        }
+      >
+        <TabsList aria-label="站点分节">
           <TabsTrigger value="organized">整理视图</TabsTrigger>
           <TabsTrigger value="origin">原站视图</TabsTrigger>
+          <TabsTrigger value="snapshots">快照与 Feed</TabsTrigger>
+          <TabsTrigger value="accounts">账号</TabsTrigger>
         </TabsList>
 
         <TabsContent value="organized">
@@ -337,6 +364,25 @@ export default function SiteWorkbenchPage() {
             description={<>计划在 M2 提供。资源详情里有站点 ID 和来源时间,可据此到原站查看。</>}
           />
         </TabsContent>
+
+        <TabsContent value="snapshots">
+          <div className="space-y-8">
+            {s ? <SnapshotPanel site={s} /> : <LoadingState rows={3} />}
+            <DetailSection
+              title="Feed"
+              actions={
+                <Button size="sm" variant="outline" onClick={() => setCreatingFeed(true)}>
+                  <Plus />
+                  新建 Feed
+                </Button>
+              }
+            >
+              <FeedTable siteId={siteId} creating={creatingFeed} onCreatingChange={setCreatingFeed} />
+            </DetailSection>
+          </div>
+        </TabsContent>
+
+        <TabsContent value="accounts">{s ? <SiteAccountsPanel site={s} /> : <LoadingState rows={3} />}</TabsContent>
       </Tabs>
 
       <ReleaseDetailSheet