Extract memind_adm admin server, add local dev tooling, and remove image-generation.

Split platform admin and ops APIs into standalone admin-server.mjs with network guards; simplify billing to RMB token pricing, refactor user auth, and add rsync deploy plus local-test scripts and docs.

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

scripts/g2-lb.Caddyfile

@@ -1,6 +1,14 @@
-# g2.tkmind.cn 本地发布：仅本机 Mac H5 (:8081)，不经过 105
+# g2.tkmind.cn 负载均衡：Studio 本机 H5 (:8081) 主 + 105 portal (经正向隧道 :18080) 灰度副
+# 权重 19:1 ≈ 95% / 5%；active 健康检查 /api/status，挂掉自动摘除
 :8090 {
-	reverse_proxy 127.0.0.1:8081 {
+	reverse_proxy {
+		to 127.0.0.1:8081 127.0.0.1:18080
+		lb_policy weighted_round_robin 19 1
+		header_down +X-Memind-Upstream {http.reverse_proxy.upstream.hostport}
+		health_uri /api/status
+		health_interval 10s
+		health_timeout 5s
+		health_status 200
 		flush_interval -1
 		transport http {
 			read_timeout 0