feat: OpsxDB 桌面数据库客户端首版入库

含工作台/连库多引擎字段与 SSH·SSL、结果编辑、Redis 键浏览、
Tauri 桌面与 docs/落地页；排除本地构建产物与 sidecar 二进制。

packages/transport/src/ginProxy.ts

@@ -0,0 +1,35 @@
+import type { HttpResult, HttpSpec, Transport, WsSession, WsSpec } from "@opsxdb/core";
+import { browserTransport } from "./browser";
+
+/**
+ * HTTP goes through Gin POST /v1/proxy/http.
+ * WS (MVP): falls back to browser WebSocket — custom headers require
+ * desktop/Gin tunnel later (Week 2).
+ */
+export function ginProxyTransport(baseUrl: string): Transport {
+  const root = baseUrl.replace(/\/$/, "");
+
+  return {
+    async http(spec: HttpSpec): Promise<HttpResult> {
+      const res = await fetch(`${root}/v1/proxy/http`, {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify(spec),
+      });
+      if (!res.ok) {
+        const text = await res.text();
+        throw new Error(`gin-proxy HTTP ${res.status}: ${text}`);
+      }
+      return (await res.json()) as HttpResult;
+    },
+
+    ws(spec: WsSpec): WsSession {
+      // TODO(week2): custom headers need desktop/Gin WS tunnel.
+      // For MVP, fall back to browser WebSocket (no custom headers).
+      console.warn(
+        "[opsxdb/transport] gin-proxy WS falls back to browser WebSocket; custom headers need desktop/Gin tunnel later",
+      );
+      return browserTransport.ws(spec);
+    },
+  };
+}