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/ui/src/notify.ts

@@ -0,0 +1,86 @@
+/** Format raw DB / API errors into a brief in-app dialog payload. */
+
+export type NotifyKind = "error" | "warning" | "info" | "success";
+
+export type NotifyPayload = {
+  id: string;
+  kind: NotifyKind;
+  title: string;
+  message: string;
+  detail?: string;
+  tips?: string[];
+  /** auto-dismiss ms for toast mode; modal stays until closed */
+  mode: "modal" | "toast";
+  durationMs?: number;
+};
+
+type Parsed = {
+  kind: NotifyKind;
+  title: string;
+  message: string;
+  detail?: string;
+  tips?: string[];
+};
+
+export function formatDbError(raw: unknown): Parsed {
+  const text = raw instanceof Error ? raw.message : String(raw ?? "未知错误");
+  const lower = text.toLowerCase();
+
+  // MySQL / MariaDB Access denied
+  if (/error\s*1045|access denied for user/i.test(text)) {
+    const noPassword = /using password:\s*NO/i.test(text);
+    return {
+      kind: "error",
+      title: "认证失败",
+      message: noPassword ? "未填密码，服务器拒绝空密码登录。" : "用户名或密码错误，或主机无权访问。",
+      detail: text,
+    };
+  }
+
+  if (/error\s*2003|can't connect|connection refused|econnrefused/i.test(text) || lower.includes("connect")) {
+    if (/refused|2003|econnrefused|timed out|timeout|unreachable/i.test(text)) {
+      return {
+        kind: "error",
+        title: "无法连接",
+        message: "主机不可达，或端口未开 / 服务未启动。",
+        detail: text,
+      };
+    }
+  }
+
+  if (/error\s*1049|unknown database/i.test(text)) {
+    return {
+      kind: "error",
+      title: "库不存在",
+      message: "数据库名不正确；可留空连接后再选。",
+      detail: text,
+    };
+  }
+
+  if (/驱动开发中/.test(text)) {
+    return {
+      kind: "warning",
+      title: "驱动开发中",
+      message: text,
+    };
+  }
+
+  if (/开发中/.test(text)) {
+    return {
+      kind: "info",
+      title: "即将推出",
+      message: text.replace(/：开发中$/, "功能开发中。"),
+    };
+  }
+
+  return {
+    kind: "error",
+    title: "操作失败",
+    message: text.length > 120 ? "发生错误，详见详情。" : text,
+    detail: text.length > 120 ? text : undefined,
+  };
+}
+
+export function notifyId() {
+  return crypto.randomUUID();
+}