fix: resolve TypeScript compilation error in askFollowupQuestionTool

- Removed duplicate type definition that was causing syntax errors
- Fixed lines 38-42 to have proper TypeScript union type syntax
- All tests now passing (260 test files, 3384 tests)

Author: hannesrudolph

src/core/tools/askFollowupQuestionTool.ts

@@ -36,11 +36,8 @@ export async function askFollowupQuestionTool(
 			if (follow_up) {
 				// Define the actual structure returned by the XML parser for both formats
 				type ParsedSuggestion =
-type ParsedSuggestion =
-  | string // For backward compatibility with old format
-  | { "#text": string; "@_mode"?: string } // Old attribute format
-  | { content: string; mode?: string } // New nested element format
-					| { "#text": string; "@_mode"?: string } // For backward compatibility with old attribute format
+					| string // For backward compatibility with old format
+					| { "#text": string; "@_mode"?: string } // Old attribute format
 					| { content: string; mode?: string } // New nested element format
 					| { [key: string]: any } // Fallback for unexpected structures