feat: 可选社区上报与官方精选展柜

默认关闭，仪表盘一键开关；枢纽由运维配置收报，人工精选后展示于 /showcase。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/admin/CommunitySupportStrip.tsx

@@ -0,0 +1,85 @@
+import { useEffect, useState } from 'react';
+import { Heart } from 'lucide-react';
+import { notify } from '@/lib/notify';
+import { api } from '../../api/client';
+import type { CommunityConfig } from '../../api/types';
+
+const EMPTY_COMMUNITY: CommunityConfig = {
+  report_enabled: false,
+  hub_enabled: false,
+  hub_url: 'https://bbs.iioio.com',
+  site_url: '',
+  instance_id: '',
+};
+
+/** 仪表盘页脚：自愿社区上报开关（默认关，即时保存） */
+export default function CommunitySupportStrip() {
+  const [community, setCommunity] = useState<CommunityConfig>(EMPTY_COMMUNITY);
+  const [saving, setSaving] = useState(false);
+  const [ready, setReady] = useState(false);
+
+  useEffect(() => {
+    let cancelled = false;
+    api.adminSettings()
+      .then((s) => {
+        if (!cancelled) {
+          setCommunity({ ...EMPTY_COMMUNITY, ...(s.community ?? {}) });
+          setReady(true);
+        }
+      })
+      .catch(() => {
+        if (!cancelled) setReady(true);
+      });
+    return () => { cancelled = true; };
+  }, []);
+
+  const handleToggle = async () => {
+    if (saving || !ready) return;
+    const next = !community.report_enabled;
+    const prev = community;
+    setCommunity((c) => ({ ...c, report_enabled: next }));
+    setSaving(true);
+    try {
+      const r = await api.adminUpdateCommunitySettings({
+        ...EMPTY_COMMUNITY,
+        report_enabled: next,
+      });
+      setCommunity({ ...EMPTY_COMMUNITY, ...r.community });
+      if (r.heartbeat_error) {
+        notify.warning(`${r.message}：${r.heartbeat_error}`);
+      } else {
+        notify.success(next ? '已开启社区上报' : '已关闭社区上报');
+      }
+    } catch (e: unknown) {
+      setCommunity(prev);
+      notify.error(e instanceof Error ? e.message : '保存失败');
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  return (
+    <div className="admin-community-support-strip" role="group" aria-label="支持姜十三开源">
+      <div className="admin-community-support-strip-main">
+        <Heart size={16} className="admin-community-support-strip-icon" aria-hidden />
+        <div className="admin-community-support-strip-copy">
+          <strong>支持姜十三开源</strong>
+          <span>
+            匿名向 bbs.iioio.com 上报站点地址、版本与规模；开启后有机会获官方演示站展示与推荐，可随时关闭
+          </span>
+        </div>
+      </div>
+      <button
+        type="button"
+        role="switch"
+        aria-checked={community.report_enabled}
+        aria-busy={saving}
+        disabled={saving || !ready}
+        className={`admin-settings-switch${community.report_enabled ? ' is-on' : ''}`}
+        onClick={() => void handleToggle()}
+      >
+        <span className="admin-settings-switch-ui" aria-hidden />
+      </button>
+    </div>
+  );
+}