fix(ui): remove mobile bottom nav, unify processing indicator, and improve tooltip behavior on mobile (#632)

* fix: update tooltip component

* fix: remove the mobile navigation component

In addition,
- the sidebar is also updated to take full space
- the terminal shortcuts in shell are updated to not interfere with the
shell content.

* fix: remove mobile nav component

* fix: remove "Thinking..." indicator

In addition, the claude status component has been restyled to be more
compact and less obtrusive.
- The type and prop arguments for ChatMessagesPane have been updated to
remove the isLoading prop, which was only used to control the display of
 the AssistantThinkingIndicator.

* fix: show elapsed time only when loading

---------

Co-authored-by: Haileyesus <something@gmail.com>
Co-authored-by: Simos Mikelatos <simosmik@gmail.com>

src/components/sidebar/view/subcomponents/SidebarFooter.tsx

@@ -122,7 +122,7 @@ export default function SidebarFooter({
       </div>
 
       {/* Mobile settings */}
-      <div className="px-3 pb-20 pt-2 md:hidden">
+      <div className="px-3 pb-3 pt-2 md:hidden">
         <button
           className="flex h-12 w-full items-center gap-3.5 rounded-xl bg-muted/40 px-4 transition-all hover:bg-muted/60 active:scale-[0.98]"
           onClick={onShowSettings}