feat(web): settings with 9 sidebar sections and Agent upstream management

- /console/settings#<section>[/<anchor>]; legacy ?tab= redirected in clientLoader
- SETTINGS_SECTIONS in contracts with field-ownership test
- Agent section: upstream list, create wizard (provider -> credentials/model -> login/test/default),
  edit drawer with OAuth browser/device login, test, set default, delete
- sites section with site registration, snapshot/rate-limit drawer and account credentials
- path mappings moved into downloader / media-server drawers; metadata and account sections

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

apps/web/app/api/instances.ts

@@ -16,8 +16,11 @@ import type {
   PathMappingUpdate,
   Site,
   SiteAccount,
+  SiteAccountUpdate,
+  SiteCreate,
   SiteCredentialsPut,
   SiteCredentialsResult,
+  SiteUpdate,
 } from "@umt/contracts";
 import { apiData } from "~/lib/api.ts";
 import { type QueryArea, qk } from "~/lib/query-keys.ts";
@@ -115,6 +118,52 @@ export function usePutSiteCredentials() {
       apiData<SiteCredentialsResult>("/sites/{id}/credentials", { method: "PUT", pathParams: { id: siteId }, body }),
     onSuccess: () => {
       qc.invalidateQueries({ queryKey: qk.all("site-accounts") });
+      qc.invalidateQueries({ queryKey: qk.all("sites") });
     },
   });
 }
+
+// ─── 站点登记与参数(设置"站点与账号";浏览在站点工作台) ───
+
+function useInvalidateSites() {
+  const qc = useQueryClient();
+  return () => {
+    // sites.ts 用 ["sites", …],这里的列表用 qk.list("sites"),两者同前缀
+    qc.invalidateQueries({ queryKey: qk.all("sites") });
+    qc.invalidateQueries({ queryKey: qk.all("site-accounts") });
+  };
+}
+
+export function useCreateSite() {
+  const inv = useInvalidateSites();
+  return useMutation({
+    mutationFn: (body: SiteCreate) => apiData<Site>("/sites", { method: "POST", body }),
+    onSuccess: inv,
+  });
+}
+
+export function useUpdateSite() {
+  const inv = useInvalidateSites();
+  return useMutation({
+    mutationFn: ({ id, body }: { id: string; body: SiteUpdate }) =>
+      apiData<Site>("/sites/{id}", { method: "PATCH", pathParams: { id }, body }),
+    onSuccess: inv,
+  });
+}
+
+export function useUpdateSiteAccount() {
+  const inv = useInvalidateSites();
+  return useMutation({
+    mutationFn: ({ id, body }: { id: string; body: SiteAccountUpdate }) =>
+      apiData<SiteAccount>("/site-accounts/{id}", { method: "PATCH", pathParams: { id }, body }),
+    onSuccess: inv,
+  });
+}
+
+export function useRemoveSiteAccount() {
+  const inv = useInvalidateSites();
+  return useMutation({
+    mutationFn: (id: string) => apiData<unknown>("/site-accounts/{id}", { method: "DELETE", pathParams: { id } }),
+    onSuccess: inv,
+  });
+}