feat(web): nav regroup, site RSS tab and site types (IA-2)

- sidebar: 概览 / 获取 / 整理 / 系统. Tasks moves to 系统; sites,
  subscriptions and rules form the 获取 group (ACQUIRE_GROUP_TITLE in
  nav.ts, the single place to rename it); standalone RSS nav item removed
- site detail gets an RSS tab with everything the RSS page had (create,
  edit, enable, fetch now, fetch state) plus recent items; tabs and
  header actions follow the site's capabilities
- old /console/sources links redirect to the site's RSS tab (?feed= looks
  up the owning site) or the site list; task links to RSS point at sites
- site list shows and filters by type; add-site wizard starts with a type
  step (PT still picks from the definition library; public BT / custom
  RSS source only need name, URL and RSS URL)

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

apps/web/app/api/sites.ts

@@ -151,7 +151,11 @@ export function useCreateSite() {
   const qc = useQueryClient();
   return useMutation({
     mutationFn: (body: SiteCreate) => apiMutate("/api/v1/sites", { body }).then((d) => Site.parse(d)),
-    onSuccess: () => qc.invalidateQueries({ queryKey: siteKeys.all }),
+    onSuccess: () => {
+      void qc.invalidateQueries({ queryKey: siteKeys.all });
+      // 非 PT 站添加时可能一并建了 RSS
+      void qc.invalidateQueries({ queryKey: ["feeds"] });
+    },
   });
 }