ui: Let Music rec results also show in 2 lines

dev: simplify delete confirmation copy

dev: Refining Domain searches

dev: Regenerate button and UI opts

uiux: fix mobile layout for preferences panel and result cards

uiux: add per-message copy button

uiux: auto-dismiss task notifications after 5s with enter/exit animation

fix: keep pending requests across conversations

fix: branch switching reload in recursive

frontend: Display message and input style

dev: Chat History are made Tree-shaped structure for editing support

dev:frontend: Using Bootstrap Icons for message edit buttons

optimize user interaction

add new color design

changed icon

changed map ui

small refine

Update: styles.css changes

refined

Fix: Center sidebar toggle buttons on mobile devices

jn's part - a base of front&back-end, complete the basic interaction requirements