FIX: do not show converter-restoration warning in empty chat

frontend/src/components/Chat/ChatWindow.test.tsx

@@ -7046,4 +7046,39 @@ describe("ChatWindow Integration", () => {
       })))
     })
   })
+
+  describe('converter restoration warning', () => {
+    it('does not show converter restoration warning on fresh empty chat with no conversation', async () => {
+      render(
+        <TestWrapper>
+          <ChatWindow
+            {...defaultProps}
+            activeTarget={mockTarget}
+            attackResultId={null}
+            conversationId={null}
+            activeConversationId={null}
+            defaultsReady={true}
+          />
+        </TestWrapper>,
+      )
+      expect(screen.queryByText(/Converter choices could not be restored/)).not.toBeInTheDocument()
+      expect(screen.getByText('There are no messages in this conversation yet.')).toBeInTheDocument()
+    })
+
+    it('does not show converter restoration warning while fresh chat is loading without active target', async () => {
+      render(
+        <TestWrapper>
+          <ChatWindow
+            {...defaultProps}
+            activeTarget={null}
+            attackResultId={null}
+            conversationId={null}
+            activeConversationId={null}
+            defaultsReady={false}
+          />
+        </TestWrapper>,
+      )
+      expect(screen.queryByText(/Converter choices could not be restored/)).not.toBeInTheDocument()
+    })
+  })
 })

frontend/src/components/Chat/ChatWindow.tsx

@@ -1828,7 +1828,7 @@ export default function ChatWindow({
           </MessageBar>
         )}
         <div hidden={editDraft !== null}>
-        {recoveredDraftWarningConversationId === viewedConversationId && (
+        {Boolean(recoveredDraftWarningConversationId) && recoveredDraftWarningConversationId === viewedConversationId && (
           <MessageBar intent="warning">
             <MessageBarBody>Converter choices could not be restored. Select and apply converters again before sending.</MessageBarBody>
           </MessageBar>