feat(connection): auto-generate name when left empty

Allow saving connections without a name by generating one in the format
`{DbType}_{random4chars}` (e.g. Neo4j_a3f2). Update placeholder text
to inform users about auto-generation.

src/components/connection/ConnectionDialog.vue

@@ -515,8 +515,17 @@ async function testConnection() {
   }
 }
 
+function generateConnectionName(): string {
+  const label = selectedProfile().label;
+  const rand = Math.random().toString(36).slice(2, 6);
+  return `${label}_${rand}`;
+}
+
 function connectionConfigForSubmit(id: string): ConnectionConfig {
   const config: ConnectionConfig = { ...form.value, id };
+  if (!config.name?.trim()) {
+    config.name = generateConnectionName();
+  }
   const sshTimeout = Number(config.ssh_connect_timeout_secs);
   config.ssh_connect_timeout_secs = Number.isFinite(sshTimeout) && sshTimeout > 0 ? sshTimeout : 5;
   const proxyPort = Number(config.proxy_port);
@@ -1431,7 +1440,6 @@ function openExternalUrl(url: string) {
             @click="save"
             :disabled="
               isSaving ||
-              !form.name ||
               (!form.host &&
                 !(mongoUseUrl && form.connection_string) &&
                 !(form.db_type === 'jdbc' && form.connection_string))

src/i18n/locales/en.ts

@@ -93,7 +93,7 @@ export default {
   connection: {
     title: "New Connection",
     name: "Name",
-    namePlaceholder: "My Database",
+    namePlaceholder: "Connection name, auto-generated if empty",
     type: "Type",
     host: "Host",
     filePath: "File Path",

src/i18n/locales/es.ts

@@ -93,7 +93,7 @@ export default {
   connection: {
     title: "Nueva conexión",
     name: "Nombre",
-    namePlaceholder: "Mi base de datos",
+    namePlaceholder: "Nombre de conexión, se genera automáticamente si está vacío",
     type: "Tipo",
     host: "Host",
     filePath: "Ruta del archivo",

src/i18n/locales/zh-CN.ts

@@ -92,7 +92,7 @@ export default {
   connection: {
     title: "新建连接",
     name: "名称",
-    namePlaceholder: "我的数据库",
+    namePlaceholder: "连接名称，留空则自动生成",
     type: "类型",
     host: "主机",
     filePath: "文件路径",