fix(ai): make custom output token budget configurable

src-tauri/src/commands/ai.rs

@@ -670,6 +670,7 @@ mod tests {
             proxy_url: String::new(),
             enable_thinking: false,
             reasoning_level: AiReasoningLevel::Default,
+            max_output_tokens: None,
             runtime_effort: None,
             context_window: None,
             max_retries: None,