fix(studio): Route Code tab to CodeExporter instead of always rendering preview

CHANGELOG.md

@@ -8,6 +8,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Fixed
+- **Studio: Code tab now shows CodeExporter** — The Code tab in Studio metadata detail pages
+  now correctly renders the `CodeExporter` component (TypeScript/JSON export with copy-to-clipboard)
+  instead of always showing the JSON Inspector preview. The default plugin now registers two separate
+  viewers: `json-inspector` for preview mode and `code-exporter` for code mode.
 - **CI Test Failures** — Resolved test failures across multiple packages:
   - `@objectstack/service-ai`: Fixed SDK fallback test by mocking `@ai-sdk/openai` dynamic import
     (SDK now available as transitive workspace dependency)

apps/studio/src/plugins/built-in/default-plugin.tsx

@@ -3,44 +3,130 @@
 /**
  * Built-in Plugin: Default Metadata Inspector
  * 
- * Provides a JSON tree viewer as the fallback for any metadata type
- * that doesn't have a specialized plugin. This is the "catch-all" viewer.
+ * Provides two fallback viewers for any metadata type:
+ * - **json-inspector** (preview mode): JSON tree viewer via MetadataInspector
+ * - **code-exporter** (code mode): Exportable TypeScript/JSON via CodeExporter
  * 
  * Priority is set to -1 so any type-specific plugin will take precedence.
  */
 
+import { useState, useEffect } from 'react';
 import { defineStudioPlugin } from '@objectstack/spec/studio';
+import { useClient } from '@objectstack/client-react';
 import { MetadataInspector } from '@/components/MetadataInspector';
+import { CodeExporter } from '@/components/CodeExporter';
+import type { CodeExporterProps } from '@/components/CodeExporter';
 import type { StudioPlugin, MetadataViewerProps } from '../types';
 
-// ─── Viewer Component (adapts MetadataInspector to plugin interface) ─
+// ─── Helpers ─────────────────────────────────────────────────────────
 
-function DefaultViewerComponent({ metadataType, metadataName, packageId }: MetadataViewerProps) {
+/** Map Studio metadataType (often plural) to CodeExporter's ExportType (singular). */
+const METADATA_TO_EXPORT_TYPE: Record<string, CodeExporterProps['type']> = {
+  object: 'object',
+  objects: 'object',
+  view: 'view',
+  views: 'view',
+  flow: 'flow',
+  flows: 'flow',
+  agent: 'agent',
+  agents: 'agent',
+  app: 'app',
+  apps: 'app',
+};
+
+// ─── Preview Viewer (JSON Inspector) ─────────────────────────────────
+
+function PreviewViewerComponent({ metadataType, metadataName, packageId }: MetadataViewerProps) {
   return <MetadataInspector metaType={metadataType} metaName={metadataName} packageId={packageId} />;
 }
 
+// ─── Code Viewer (Code Exporter) ─────────────────────────────────────
+
+function CodeViewerComponent({ metadataType, metadataName, data, packageId }: MetadataViewerProps) {
+  const client = useClient();
+  const [definition, setDefinition] = useState<Record<string, unknown> | null>(data ?? null);
+  const [loading, setLoading] = useState(!data);
+
+  useEffect(() => {
+    // If data was passed directly, use it
+    if (data) {
+      setDefinition(data as Record<string, unknown>);
+      setLoading(false);
+      return;
+    }
+
+    let mounted = true;
+    setLoading(true);
+
+    async function load() {
+      try {
+        const result: any = await client.meta.getItem(metadataType, metadataName, packageId ? { packageId } : undefined);
+        if (mounted) {
+          setDefinition(result?.item || result);
+        }
+      } catch (err) {
+        console.error(`[CodeViewer] Failed to load ${metadataType}/${metadataName}:`, err);
+      } finally {
+        if (mounted) setLoading(false);
+      }
+    }
+    load();
+    return () => { mounted = false; };
+  }, [client, metadataType, metadataName, data, packageId]);
+
+  if (loading) {
+    return (
+      <div className="p-4 text-sm text-muted-foreground">Loading definition…</div>
+    );
+  }
+
+  if (!definition) {
+    return (
+      <div className="p-4 text-sm text-muted-foreground">
+        Definition not found: <code className="font-mono">{metadataName}</code>
+      </div>
+    );
+  }
+
+  const exportType = METADATA_TO_EXPORT_TYPE[metadataType] ?? 'object';
+
+  return (
+    <div className="p-4">
+      <CodeExporter type={exportType} definition={definition} name={metadataName} />
+    </div>
+  );
+}
+
 // ─── Plugin Definition ───────────────────────────────────────────────
 
 export const defaultInspectorPlugin: StudioPlugin = {
   manifest: defineStudioPlugin({
     id: 'objectstack.default-inspector',
     name: 'Default Metadata Inspector',
     version: '1.0.0',
-    description: 'JSON tree viewer for any metadata type. Fallback when no specialized viewer is available.',
+    description: 'JSON tree viewer and code exporter for any metadata type. Fallback when no specialized viewer is available.',
     contributes: {
       metadataViewers: [
         {
           id: 'json-inspector',
-          metadataTypes: ['*'],  // Wildcard: matches all types
+          metadataTypes: ['*'],
           label: 'JSON Inspector',
-          priority: -1,          // Lowest priority — any plugin overrides this
-          modes: ['preview', 'code'],
+          priority: -1,
+          modes: ['preview'],
+        },
+        {
+          id: 'code-exporter',
+          metadataTypes: ['*'],
+          label: 'Code Export',
+          priority: -1,
+          modes: ['code'],
         },
       ],
     },
   }),
 
   activate(api) {
-    api.registerViewer('json-inspector', DefaultViewerComponent);
+    api.registerViewer('json-inspector', PreviewViewerComponent);
+    api.registerViewer('code-exporter', CodeViewerComponent);
   },
 };