refactor(css): extract inline styles to css classes and update README with technical details

fix: commit pending changes for log reading logic and chat template restart link

feat(ui): add navbar with home and profile links

feat(ui): add loading state to submit button and exclude tts models

feat(gemini): implement dynamic model selection in chat interface

style: improved card alignment and responsiveness in templates

feat: add custom stylesheet for improved UI

feat(chat): greet user by name with friendly opening message

feat(ui): add basic chat interface template