feat: Adaptive UI & new Chat page

Still in draft, but anyone is free to check out my progress and give early feedback.

Checklist:

• [x] System: Adaptive interface (desktop/tablet/mobile)
• [x] System: Routing with Flutter's go_router package
• [x] Page: AI Suite, perhaps too early but basically a collection of AI tools
• [ ] Page: Feedback
• [ ] Page: Settings
• [ ] Page: Chat

Still working on the interface

Mission failed.

Hmm, late night right now and I’ve ran out of time today. My goal was to finish the Chat page this weekend but as always, it takes more time than I hoped for.

I’ll try my best to deliver something decent in the upcoming days.

Closing this issue because chat is not implemented until I'm done with Q&A (instructional model) UI. I have just committed changes that have a new Q&A style UI, but the model tokenizing leaves more to be desired. Focusing on fixing that now...