Apple Inc. stands on the verge of its most significant overhaul to Siri in more than a decade. The changes, set for preview at the company’s Worldwide Developers Conference on June 8, reshape the voice assistant into a full chatbot with its own dedicated app. They arrive after years of delays that tested the patience of investors and users alike. The new Siri won’t simply talk back. It will display conversation history in a persistent interface. Users will tap an “Ask Siri” button across the operating system or open a standalone application built for longer exchanges. Bloomberg first reported these plans in detail, revealing illustrations based on internal builds that show a clean, chat-style layout reminiscent of modern AI services yet anchored in Apple’s design language. ( Bloomberg ) But the real shift lies beneath the surface. Apple plans an “Extensions” system that lets users plug third-party AI models directly into Siri and other Apple Intelligence features.…