Complete Phase 2: Full integration of multi-platform system

This completes the integration of the cross-platform translation engine
into the main application, making it fully functional.

App.tsx Changes:
- Added platform state management (currentPlatform: PlatformId)
- Added translation panel state (showTranslation)
- Integrated TranslationPanel component with lazy loading
- Updated Toolbar with platform selector and translate button
- Passed platform prop to TemplatesDrawer and CodeEditor
- Connected all state management for seamless platform switching

TemplatesDrawer Changes:
- Now accepts currentPlatform prop
- Filters templates by selected platform using getTemplatesForPlatform()
- Shows platform icon and name in header
- Displays template count for current platform
- Ready for UEFN/Spatial/Core templates

CodeEditor Changes:
- Accepts optional platform prop (defaults to 'roblox')
- Dynamically sets Monaco editor language based on platform:
  * roblox → lua
  * uefn → plaintext (Verse not yet in Monaco)
  * spatial → typescript
  * core → lua
- Maintains backward compatibility with existing code

Functional Features:
✅ Platform switching in toolbar
✅ Templates filter by platform automatically
✅ Editor language changes with platform
✅ Translation panel opens with "Translate" button
✅ Side-by-side code comparison
✅ Mock translation working
✅ All state connected and reactive

Next: Phase 3 (Create UEFN templates) or Phase 4 (Claude API integration)

src/App.tsx

@@ -20,6 +20,8 @@ import { initPostHog, captureEvent } from './lib/posthog';
 import { initSentry, captureError } from './lib/sentry';
 import { LoadingSpinner } from './components/ui/loading-spinner';
 
+import { PlatformId } from './lib/platforms';
+
 // Lazy load heavy/modal components for code splitting and better initial load
 const TemplatesDrawer = lazy(() => import('./components/TemplatesDrawer').then(m => ({ default: m.TemplatesDrawer })));
 const WelcomeDialog = lazy(() => import('./components/WelcomeDialog').then(m => ({ default: m.WelcomeDialog })));
@@ -27,6 +29,7 @@ const PreviewModal = lazy(() => import('./components/PreviewModal').then(m => ({
 const NewProjectModal = lazy(() => import('./components/NewProjectModal').then(m => ({ default: m.NewProjectModal })));
 const EducationPanel = lazy(() => import('./components/EducationPanel').then(m => ({ default: m.EducationPanel })));
 const PassportLogin = lazy(() => import('./components/PassportLogin').then(m => ({ default: m.PassportLogin })));
+const TranslationPanel = lazy(() => import('./components/TranslationPanel').then(m => ({ default: m.TranslationPanel })));
 
 function App() {
   const [currentCode, setCurrentCode] = useState('');
@@ -36,7 +39,9 @@ function App() {
   const [showFileSearch, setShowFileSearch] = useState(false);
   const [showCommandPalette, setShowCommandPalette] = useState(false);
   const [showSearchInFiles, setShowSearchInFiles] = useState(false);
+  const [showTranslation, setShowTranslation] = useState(false);
   const [code, setCode] = useState('');
+  const [currentPlatform, setCurrentPlatform] = useState<PlatformId>('roblox');
   const isMobile = useIsMobile();
 
   const [showPassportLogin, setShowPassportLogin] = useState(false);
@@ -457,6 +462,9 @@ end)`,
     <div className="h-screen flex flex-col bg-background text-foreground">
       <Toolbar
         code={currentCode}
+        currentPlatform={currentPlatform}
+        onPlatformChange={setCurrentPlatform}
+        onTranslateClick={() => setShowTranslation(true)}
         onTemplatesClick={() => setShowTemplates(true)}
         onPreviewClick={() => setShowPreview(true)}
         onNewProjectClick={() => setShowNewProject(true)}
@@ -490,7 +498,7 @@ end)`,
                 onFileClose={handleFileClose}
               />
               <div className="flex-1">
-                <CodeEditor onCodeChange={handleCodeChange} />
+                <CodeEditor onCodeChange={handleCodeChange} platform={currentPlatform} />
               </div>
             </TabsContent>
             <TabsContent value="ai" className="flex-1 m-0">
@@ -529,7 +537,7 @@ end)`,
                       onFileClose={handleFileClose}
                     />
                     <div className="flex-1">
-                      <CodeEditor onCodeChange={setCurrentCode} />
+                      <CodeEditor onCodeChange={setCurrentCode} platform={currentPlatform} />
                     </div>
                   </div>
                 </ResizablePanel>
@@ -572,6 +580,7 @@ end)`,
           <TemplatesDrawer
             onSelectTemplate={handleTemplateSelect}
             onClose={() => setShowTemplates(false)}
+            currentPlatform={currentPlatform}
           />
         )}
       </Suspense>
@@ -592,6 +601,17 @@ end)`,
         />
       </Suspense>
 
+      <Suspense fallback={null}>
+        {showTranslation && (
+          <TranslationPanel
+            isOpen={showTranslation}
+            onClose={() => setShowTranslation(false)}
+            currentCode={currentCode}
+            currentPlatform={currentPlatform}
+          />
+        )}
+      </Suspense>
+
       <Suspense fallback={null}>
         <WelcomeDialog />
       </Suspense>

src/components/CodeEditor.tsx

@@ -1,14 +1,24 @@
 import Editor from '@monaco-editor/react';
 import { useKV } from '@github/spark/hooks';
-import { useEffect } from 'react';
+import { useEffect, useMemo } from 'react';
 import { LoadingSpinner } from './ui/loading-spinner';
 import { toast } from 'sonner';
+import { PlatformId } from '@/lib/platforms';
 
 interface CodeEditorProps {
   onCodeChange?: (code: string) => void;
+  platform?: PlatformId;
 }
 
-export function CodeEditor({ onCodeChange }: CodeEditorProps) {
+export function CodeEditor({ onCodeChange, platform = 'roblox' }: CodeEditorProps) {
+  const languageMap: Record<PlatformId, string> = useMemo(() => ({
+    roblox: 'lua',
+    uefn: 'plaintext', // Verse not yet supported by Monaco, use plaintext
+    spatial: 'typescript',
+    core: 'lua',
+  }), []);
+
+  const editorLanguage = languageMap[platform];
   const [code, setCode] = useKV('aethex-current-code', `-- Welcome to AeThex Studio!
 -- Write your Roblox Lua code here
 
@@ -61,7 +71,7 @@ end)
       <div className="flex-1 min-h-0">
         <Editor
           height="100%"
-          defaultLanguage="lua"
+          language={editorLanguage}
           theme="vs-dark"
           value={code}
           onChange={handleEditorChange}

src/components/TemplatesDrawer.tsx

@@ -4,19 +4,24 @@ import { ScrollArea } from '@/components/ui/scroll-area';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
 import { Badge } from '@/components/ui/badge';
 import { X } from '@phosphor-icons/react';
-import { templates, type ScriptTemplate } from '@/lib/templates';
+import { templates, type ScriptTemplate, getTemplatesForPlatform } from '@/lib/templates';
+import { PlatformId, getPlatform } from '@/lib/platforms';
 
 interface TemplatesDrawerProps {
   onSelectTemplate: (code: string) => void;
   onClose: () => void;
+  currentPlatform: PlatformId;
 }
 
-export function TemplatesDrawer({ onSelectTemplate, onClose }: TemplatesDrawerProps) {
+export function TemplatesDrawer({ onSelectTemplate, onClose, currentPlatform }: TemplatesDrawerProps) {
+  const platform = getPlatform(currentPlatform);
+  const platformTemplates = getTemplatesForPlatform(currentPlatform);
+
   const categories = {
-    beginner: templates.filter(t => t.category === 'beginner'),
-    gameplay: templates.filter(t => t.category === 'gameplay'),
-    ui: templates.filter(t => t.category === 'ui'),
-    tools: templates.filter(t => t.category === 'tools'),
+    beginner: platformTemplates.filter(t => t.category === 'beginner'),
+    gameplay: platformTemplates.filter(t => t.category === 'gameplay'),
+    ui: platformTemplates.filter(t => t.category === 'ui'),
+    tools: platformTemplates.filter(t => t.category === 'tools'),
   };
 
   const handleTemplateClick = (template: ScriptTemplate) => {
@@ -29,9 +34,12 @@ export function TemplatesDrawer({ onSelectTemplate, onClose }: TemplatesDrawerPr
       <Card className="w-full max-w-4xl max-h-[80vh] flex flex-col bg-card border-border">
         <div className="flex items-center justify-between p-4 border-b border-border">
           <div>
-            <h2 className="text-2xl font-bold">Script Templates</h2>
+            <h2 className="text-2xl font-bold flex items-center gap-2">
+              <span>{platform.icon}</span>
+              {platform.displayName} Templates
+            </h2>
             <p className="text-sm text-muted-foreground mt-1">
-              Choose a template to get started quickly
+              {platformTemplates.length} templates available • Choose one to get started
             </p>
           </div>
           <Button variant="ghost" size="icon" onClick={onClose}>