feat: add JSON view mode toggle for query results

Add a Table/JSON segmented toggle to both the query workspace and
table data viewer, allowing users to switch between tabular and
pretty-printed JSON display of results without exporting to a file.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/results/ResultsJsonView.tsx

@@ -0,0 +1,60 @@
+import { useMemo } from "react";
+
+interface Props {
+  columns: string[];
+  rows: unknown[][];
+}
+
+function syntaxHighlight(json: string): string {
+  return json.replace(
+    /("(\\u[\da-fA-F]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+-]?\d+)?)/g,
+    (match) => {
+      let cls = "text-blue-500 dark:text-blue-400"; // number
+      if (match.startsWith('"')) {
+        if (match.endsWith(":")) {
+          cls = "text-foreground"; // key
+        } else {
+          cls = "text-green-600 dark:text-green-400"; // string
+        }
+      } else if (/true|false/.test(match)) {
+        cls = "text-purple-500 dark:text-purple-400"; // boolean
+      } else if (match === "null") {
+        cls = "text-muted-foreground italic"; // null
+      }
+      return `<span class="${cls}">${match}</span>`;
+    }
+  );
+}
+
+export function ResultsJsonView({ columns, rows }: Props) {
+  const jsonData = useMemo(() => {
+    return rows.map((row) => {
+      const obj: Record<string, unknown> = {};
+      columns.forEach((col, i) => {
+        obj[col] = row[i];
+      });
+      return obj;
+    });
+  }, [columns, rows]);
+
+  const highlighted = useMemo(
+    () => syntaxHighlight(JSON.stringify(jsonData, null, 2)),
+    [jsonData]
+  );
+
+  return (
+    <div className="flex h-full flex-col">
+      <div className="border-b px-3 py-1">
+        <span className="text-xs text-muted-foreground">
+          {rows.length} row{rows.length !== 1 ? "s" : ""}
+        </span>
+      </div>
+      <div className="flex-1 overflow-auto">
+        <pre
+          className="p-3 text-xs leading-5 font-mono"
+          dangerouslySetInnerHTML={{ __html: highlighted }}
+        />
+      </div>
+    </div>
+  );
+}

src/components/results/ResultsPanel.tsx

@@ -1,4 +1,5 @@
 import { ResultsTable } from "./ResultsTable";
+import { ResultsJsonView } from "./ResultsJsonView";
 import type { QueryResult } from "@/types";
 import { Loader2, AlertCircle } from "lucide-react";
 
@@ -6,6 +7,7 @@ interface Props {
   result?: QueryResult | null;
   error?: string | null;
   isLoading?: boolean;
+  viewMode?: "table" | "json";
   onCellDoubleClick?: (
     rowIndex: number,
     colIndex: number,
@@ -18,6 +20,7 @@ export function ResultsPanel({
   result,
   error,
   isLoading,
+  viewMode = "table",
   onCellDoubleClick,
   highlightedCells,
 }: Props) {
@@ -57,6 +60,15 @@ export function ResultsPanel({
     );
   }
 
+  if (viewMode === "json") {
+    return (
+      <ResultsJsonView
+        columns={result.columns}
+        rows={result.rows}
+      />
+    );
+  }
+
   return (
     <ResultsTable
       columns={result.columns}

src/components/table-viewer/TableDataView.tsx

@@ -1,6 +1,7 @@
 import { useState, useCallback, useMemo } from "react";
 import { useTableData } from "@/hooks/use-table-data";
 import { ResultsTable } from "@/components/results/ResultsTable";
+import { ResultsJsonView } from "@/components/results/ResultsJsonView";
 import { PaginationControls } from "./PaginationControls";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
@@ -9,7 +10,7 @@ import { getTableColumns } from "@/lib/tauri";
 import { useQuery, useQueryClient } from "@tanstack/react-query";
 import { useAppStore } from "@/stores/app-store";
 import { toast } from "sonner";
-import { Save, RotateCcw, Filter, Loader2, Lock, Download, Plus } from "lucide-react";
+import { Save, RotateCcw, Filter, Loader2, Lock, Download, Plus, Table2, Braces } from "lucide-react";
 import { InsertRowDialog } from "./InsertRowDialog";
 import {
   DropdownMenu,
@@ -41,6 +42,7 @@ export function TableDataView({ connectionId, schema, table }: Props) {
   >(new Map());
   const [isSaving, setIsSaving] = useState(false);
   const [insertDialogOpen, setInsertDialogOpen] = useState(false);
+  const [viewMode, setViewMode] = useState<"table" | "json">("table");
   const queryClient = useQueryClient();
 
   const { data, isLoading, error } = useTableData({
@@ -197,6 +199,7 @@ export function TableDataView({ connectionId, schema, table }: Props) {
           Apply
         </Button>
         {data && data.columns.length > 0 && (
+          <>
             <DropdownMenu>
               <DropdownMenuTrigger asChild>
                 <Button
@@ -217,6 +220,33 @@ export function TableDataView({ connectionId, schema, table }: Props) {
                 </DropdownMenuItem>
               </DropdownMenuContent>
             </DropdownMenu>
+            <div className="flex items-center rounded-md border text-xs">
+              <button
+                className={`flex items-center gap-1 px-2 py-0.5 font-medium ${
+                  viewMode === "table"
+                    ? "bg-muted text-foreground"
+                    : "text-muted-foreground hover:text-foreground"
+                }`}
+                onClick={() => setViewMode("table")}
+                title="Table view"
+              >
+                <Table2 className="h-3 w-3" />
+                Table
+              </button>
+              <button
+                className={`flex items-center gap-1 px-2 py-0.5 font-medium ${
+                  viewMode === "json"
+                    ? "bg-muted text-foreground"
+                    : "text-muted-foreground hover:text-foreground"
+                }`}
+                onClick={() => setViewMode("json")}
+                title="JSON view"
+              >
+                <Braces className="h-3 w-3" />
+                JSON
+              </button>
+            </div>
+          </>
         )}
         {!isReadOnly && (
           <Button
@@ -269,6 +299,12 @@ export function TableDataView({ connectionId, schema, table }: Props) {
             {String(error)}
           </div>
         ) : data ? (
+          viewMode === "json" ? (
+            <ResultsJsonView
+              columns={data.columns}
+              rows={data.rows}
+            />
+          ) : (
             <ResultsTable
               columns={data.columns}
               types={data.types}
@@ -281,6 +317,7 @@ export function TableDataView({ connectionId, schema, table }: Props) {
                 onSort: handleSort,
               }}
             />
+          )
         ) : null}
       </div>
 

src/components/workspace/WorkspacePanel.tsx

@@ -13,7 +13,7 @@ import { useCompletionSchema } from "@/hooks/use-completion-schema";
 import { useConnections } from "@/hooks/use-connections";
 import { useAppStore } from "@/stores/app-store";
 import { Button } from "@/components/ui/button";
-import { Play, Loader2, Lock, BarChart3, Download, AlignLeft, Bookmark } from "lucide-react";
+import { Play, Loader2, Lock, BarChart3, Download, AlignLeft, Bookmark, Table2, Braces } from "lucide-react";
 import { format as formatSql } from "sql-formatter";
 import { SaveQueryDialog } from "@/components/saved-queries/SaveQueryDialog";
 import {
@@ -49,6 +49,7 @@ export function WorkspacePanel({
   const [error, setError] = useState<string | null>(null);
   const [explainData, setExplainData] = useState<ExplainResult | null>(null);
   const [resultView, setResultView] = useState<"results" | "explain">("results");
+  const [resultViewMode, setResultViewMode] = useState<"table" | "json">("table");
   const [saveDialogOpen, setSaveDialogOpen] = useState(false);
 
   const queryMutation = useQueryExecution();
@@ -290,7 +291,7 @@ export function WorkspacePanel({
       <ResizableHandle withHandle />
       <ResizablePanel id="results" defaultSize="60%" minSize="15%">
         {(explainData || result || error) && (
-          <div className="flex border-b text-xs">
+          <div className="flex items-center border-b text-xs">
             <button
               className={`px-3 py-1 font-medium ${
                 resultView === "results"
@@ -313,6 +314,34 @@ export function WorkspacePanel({
                 Explain
               </button>
             )}
+            {resultView === "results" && result && result.columns.length > 0 && (
+              <div className="ml-auto mr-2 flex items-center rounded-md border">
+                <button
+                  className={`flex items-center gap-1 px-2 py-0.5 font-medium ${
+                    resultViewMode === "table"
+                      ? "bg-muted text-foreground"
+                      : "text-muted-foreground hover:text-foreground"
+                  }`}
+                  onClick={() => setResultViewMode("table")}
+                  title="Table view"
+                >
+                  <Table2 className="h-3 w-3" />
+                  Table
+                </button>
+                <button
+                  className={`flex items-center gap-1 px-2 py-0.5 font-medium ${
+                    resultViewMode === "json"
+                      ? "bg-muted text-foreground"
+                      : "text-muted-foreground hover:text-foreground"
+                  }`}
+                  onClick={() => setResultViewMode("json")}
+                  title="JSON view"
+                >
+                  <Braces className="h-3 w-3" />
+                  JSON
+                </button>
+              </div>
+            )}
           </div>
         )}
         {resultView === "explain" && explainData ? (
@@ -322,6 +351,7 @@ export function WorkspacePanel({
             result={result}
             error={error}
             isLoading={queryMutation.isPending && resultView === "results"}
+            viewMode={resultViewMode}
           />
         )}
       </ResizablePanel>