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/app/AppContent.tsx

@@ -7,7 +7,6 @@ import { useWebSocket } from '../../contexts/WebSocketContext';
 import { useDeviceSettings } from '../../hooks/useDeviceSettings';
 import { useSessionProtection } from '../../hooks/useSessionProtection';
 import { useProjectsState } from '../../hooks/useProjectsState';
-import MobileNav from './MobileNav';
 
 export default function AppContent() {
   const navigate = useNavigate();
@@ -33,7 +32,6 @@ export default function AppContent() {
     activeTab,
     sidebarOpen,
     isLoadingProjects,
-    isInputFocused,
     externalMessageUpdate,
     setActiveTab,
     setSidebarOpen,
@@ -159,7 +157,7 @@ export default function AppContent() {
         </div>
       )}
 
-      <div className={`flex min-w-0 flex-1 flex-col ${isMobile ? 'pb-mobile-nav' : ''}`}>
+      <div className="flex min-w-0 flex-1 flex-col">
         <MainContent
           selectedProject={selectedProject}
           selectedSession={selectedSession}
@@ -184,14 +182,6 @@ export default function AppContent() {
         />
       </div>
 
-      {isMobile && (
-        <MobileNav
-          activeTab={activeTab}
-          setActiveTab={setActiveTab}
-          isInputFocused={isInputFocused}
-        />
-      )}
-
     </div>
   );
 }