feat: add data export functionality and version display in UI

src/components/sidebar/TreeItem.vue

@@ -5,11 +5,12 @@ import {
   Database, Table, Columns3, Eye, ChevronRight, ChevronDown,
   Loader2, FolderOpen, Trash2, TerminalSquare, RefreshCw,
   Copy, TableProperties, Key, Link, Zap, ListTree, Pencil, Plug, Unplug,
-  Pin, ArrowRightLeft,
+  Pin, ArrowRightLeft, Download, FileCode,
 } from "lucide-vue-next";
 import {
   ContextMenu, ContextMenuContent, ContextMenuItem,
   ContextMenuSeparator, ContextMenuTrigger,
+  ContextMenuSub, ContextMenuSubTrigger, ContextMenuSubContent,
 } from "@/components/ui/context-menu";
 import { useConnectionStore } from "@/stores/connectionStore";
 import { useQueryStore } from "@/stores/queryStore";
@@ -225,6 +226,75 @@ function copyName() {
   navigator.clipboard.writeText(props.node.label);
 }
 
+async function exportStructure() {
+  const node = props.node;
+  if (!node.connectionId || !node.database) return;
+  try {
+    await connectionStore.ensureConnected(node.connectionId);
+    const ddl = await api.getTableDdl(node.connectionId, node.database, node.schema || node.database, node.label);
+    const { save } = await import("@tauri-apps/plugin-dialog");
+    const { writeTextFile } = await import("@tauri-apps/plugin-fs");
+    const path = await save({ defaultPath: `${node.label}.sql`, filters: [{ name: "SQL", extensions: ["sql"] }] });
+    if (path) await writeTextFile(path, ddl + "\n");
+  } catch (e: any) {
+    console.error("Export structure failed:", e);
+  }
+}
+
+async function exportData(format: "csv" | "json" | "sql") {
+  const node = props.node;
+  if (!node.connectionId || !node.database) return;
+  const config = connectionStore.getConfig(node.connectionId);
+  if (!config) return;
+
+  try {
+    await connectionStore.ensureConnected(node.connectionId);
+    const qualifiedName = (config.db_type === "postgres" || config.db_type === "oracle" || config.db_type === "sqlserver") && node.schema
+      ? `${quoteIdent(node.schema)}.${quoteIdent(node.label)}`
+      : quoteIdent(node.label);
+    const result = await api.executeQuery(node.connectionId, node.database, `SELECT * FROM ${qualifiedName}`);
+
+    const { save } = await import("@tauri-apps/plugin-dialog");
+    const { writeTextFile } = await import("@tauri-apps/plugin-fs");
+
+    let content: string;
+    let ext: string;
+
+    if (format === "csv") {
+      ext = "csv";
+      const esc = (v: string) => `"${v.replace(/"/g, '""')}"`;
+      const header = result.columns.map(esc).join(",");
+      const body = result.rows.map((row) => row.map((c) => esc(c === null ? "" : String(c))).join(",")).join("\n");
+      content = `${header}\n${body}`;
+    } else if (format === "json") {
+      ext = "json";
+      const data = result.rows.map((row) => {
+        const obj: Record<string, unknown> = {};
+        result.columns.forEach((col, i) => { obj[col] = row[i]; });
+        return obj;
+      });
+      content = JSON.stringify(data, null, 2);
+    } else {
+      ext = "sql";
+      const cols = result.columns.map((c) => quoteIdent(c)).join(", ");
+      const lines = result.rows.map((row) => {
+        const vals = row.map((v) => {
+          if (v === null) return "NULL";
+          if (typeof v === "number" || typeof v === "boolean") return String(v);
+          return `'${String(v).replace(/'/g, "''")}'`;
+        }).join(", ");
+        return `INSERT INTO ${qualifiedName} (${cols}) VALUES (${vals});`;
+      });
+      content = lines.join("\n");
+    }
+
+    const path = await save({ defaultPath: `${node.label}.${ext}`, filters: [{ name: ext.toUpperCase(), extensions: [ext] }] });
+    if (path) await writeTextFile(path, content);
+  } catch (e: any) {
+    console.error("Export data failed:", e);
+  }
+}
+
 function editConnection() {
   if (props.node.connectionId) {
     connectionStore.startEditing(props.node.connectionId);
@@ -393,6 +463,20 @@ async function showMore() {
           <TerminalSquare class="w-4 h-4" /> {{ t('contextMenu.newQuery') }}
         </ContextMenuItem>
         <ContextMenuSeparator />
+        <ContextMenuSub>
+          <ContextMenuSubTrigger>
+            <Download class="w-4 h-4" /> {{ t('contextMenu.exportData') }}
+          </ContextMenuSubTrigger>
+          <ContextMenuSubContent>
+            <ContextMenuItem @click="exportData('csv')">CSV</ContextMenuItem>
+            <ContextMenuItem @click="exportData('json')">JSON</ContextMenuItem>
+            <ContextMenuItem @click="exportData('sql')">SQL INSERT</ContextMenuItem>
+          </ContextMenuSubContent>
+        </ContextMenuSub>
+        <ContextMenuItem @click="exportStructure">
+          <FileCode class="w-4 h-4" /> {{ t('contextMenu.exportStructure') }}
+        </ContextMenuItem>
+        <ContextMenuSeparator />
         <ContextMenuItem @click="refresh">
           <RefreshCw class="w-4 h-4" /> {{ t('contextMenu.refreshChildren') }}
         </ContextMenuItem>

src/components/ui/context-menu/ContextMenuSubContent.vue

@@ -3,6 +3,7 @@ import type { DropdownMenuSubContentEmits, DropdownMenuSubContentProps } from 'r
 import type { HTMLAttributes } from 'vue'
 import { reactiveOmit } from '@vueuse/core'
 import {
+  ContextMenuPortal,
   ContextMenuSubContent,
   useForwardPropsEmits,
 } from 'reka-ui'
@@ -17,16 +18,18 @@ const forwarded = useForwardPropsEmits(delegatedProps, emits)
 </script>
 
 <template>
-  <ContextMenuSubContent
-    data-slot="context-menu-sub-content"
-    v-bind="forwarded"
-    :class="
-      cn(
-        'data-open:animate-in data-closed:animate-out data-closed:fade-out-0 data-open:fade-in-0 data-closed:zoom-out-95 data-open:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 text-popover-foreground min-w-32 rounded-lg ring-foreground/10 ring-1 p-1 duration-100 cn-menu-translucent z-50 origin-(--reka-context-menu-content-transform-origin) overflow-hidden',
-        props.class,
-      )
-    "
-  >
-    <slot />
-  </ContextMenuSubContent>
+  <ContextMenuPortal>
+    <ContextMenuSubContent
+      data-slot="context-menu-sub-content"
+      v-bind="forwarded"
+      :class="
+        cn(
+          'data-open:animate-in data-closed:animate-out data-closed:fade-out-0 data-open:fade-in-0 data-closed:zoom-out-95 data-open:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 text-popover-foreground min-w-32 rounded-lg ring-foreground/10 ring-1 p-1 duration-100 cn-menu-translucent z-50 origin-(--reka-context-menu-content-transform-origin) overflow-hidden',
+          props.class,
+        )
+      "
+    >
+      <slot />
+    </ContextMenuSubContent>
+  </ContextMenuPortal>
 </template>

src/components/ui/context-menu/ContextMenuSubTrigger.vue

@@ -23,7 +23,7 @@ const forwardedProps = useForwardProps(delegatedProps)
     :data-inset="inset ? '' : undefined"
     v-bind="forwardedProps"
     :class="cn(
-      'focus:bg-accent focus:text-accent-foreground data-open:bg-accent data-open:text-accent-foreground gap-1.5 rounded-md px-1.5 py-1 text-sm data-inset:pl-7 [&_svg:not([class*=size-])]:size-4 flex cursor-default items-center outline-hidden select-none [&_svg]:pointer-events-none [&_svg]:shrink-0',
+      'focus:bg-accent focus:text-accent-foreground data-open:bg-accent data-open:text-accent-foreground gap-2 rounded-md px-2 py-1 text-[13px] data-inset:pl-7 [&_svg:not([class*=size-])]:size-4 flex cursor-default items-center outline-hidden select-none [&_svg]:pointer-events-none [&_svg]:shrink-0',
       props.class,
     )"
   >