feat(mobile): mobile app navigation rework and beta-feedback closeout (#2561)

Navigation model rebuilt around two full-width drawers and a minimal
header (sessions / title-switcher / usage ring / workspace):

- Left sessions drawer: cross-project tree with live status indicators,
  swipe actions on sessions (rename/archive/delete) and on group headers
  (project edit / two-step close, worktree delete), reorder-only edit
  mode with collapsible project cards and draggable worktrees, app-level
  footer (connected instance, settings, pending web update).
- Right workspace drawer: Changes / Files / Terminal / Notes / MCP as
  pill tabs (inactive tabs icon-only); panes stay mounted once visited.
  The full desktop file editor serves the Files tab; read/skill tool taps
  in chat open the file there at the requested line.
- Header session switcher on title tap: 10 cross-project recents with
  live busy/attention indicators and project · branch metadata; the
  usage ring opens a metadata overlay with an explicit loading state.
- The overflow menu is gone on phones (its destinations moved into the
  drawers); iPad keeps it until its dedicated layout pass.

Correctness and continuity:

- /auth/session answers bearer-first, so a stale WebView cookie can no
  longer mask a revoked device token; cold launches classify failures
  fast and land on an explicit connect screen.
- Authoritative session snapshots raise frozen ordering baselines and
  stale live ranks — recents stay truthful after the app slept.
- Cold launches reopen the last active session per instance (persisted
  pointer, confirmed against a sessions snapshot; a user-opened draft
  clears it), with a logo hold instead of a draft flash.

Also: collapsed pill composer gains the stop control; chat tool rows
share one 36px rhythm; Task subtool rows truncate; larger bottom safe
area so the composer clears big-screen corner radii; Capacitor build
hides About/Update (store updates apply there); widgets link to the
sessions drawer with a list icon; MobileApp split into focused modules;
five mobile-surface detectors unified; translucent borders normalized to
70%; all new strings translated across the 10 locales.

iPad and foldable layouts are intentionally untouched - separate next version PR.

packages/ui/src/components/chat/ChatInput.tsx

@@ -48,7 +48,6 @@ import { PendingChangesBar } from './PendingChangesBar';
 import { useChatSurfaceMode } from './useChatSurfaceMode';
 import { MobileAgentButton } from './MobileAgentButton';
 import { MobileModelButton } from './MobileModelButton';
-import { MobileSessionStatusBar } from './MobileSessionStatusBar';
 import { useCurrentSessionActivity } from '@/hooks/useSessionActivity';
 import { toast } from '@/components/ui';
 // useMessageStore removed — messages now come from sync system
@@ -2482,8 +2481,10 @@ const ChatInputComponent: React.FC<ChatInputProps> = ({ onOpenSettings, scrollTo
                         newSessionDraftOpen={newSessionDraftOpen}
                         hasContent={Boolean(hasContent)}
                         isVSCode={isVSCode}
+                        canAbort={canAbort}
                         footerIconButtonClass={footerIconButtonClass}
                         iconSizeClass={iconSizeClass}
+                        stopIconSizeClass={stopIconSizeClass}
                         theme={currentTheme}
                         onExpand={mobileShell.expand}
                         onApplySuggestion={applyAssistSuggestion}
@@ -2493,6 +2494,7 @@ const ChatInputComponent: React.FC<ChatInputProps> = ({ onOpenSettings, scrollTo
                         onOpenPrPicker={openPrPicker}
                         onOpenAttachSheet={openMobileAttachSheet}
                         onStartDictation={toggleDictation}
+                        onAbort={handleAbort}
                     />
                 ) : (
                 <>
@@ -2569,7 +2571,7 @@ const ChatInputComponent: React.FC<ChatInputProps> = ({ onOpenSettings, scrollTo
                         onClose={closeAutocomplete}
                     />
                     {/* Positioning context for the dictation overlay: covers the
-                        text area + footer exactly, excluding MobileSessionStatusBar. */}
+                        text area + footer exactly. */}
                     <div className={cn('relative flex flex-col', isComposerExpanded && 'flex-1 min-h-0')}>
                     <div className={cn("overflow-hidden", isComposerExpanded && 'flex flex-1 min-h-0 flex-col')}>
                         {isMobile ? (
@@ -2704,10 +2706,6 @@ const ChatInputComponent: React.FC<ChatInputProps> = ({ onOpenSettings, scrollTo
                     />
                 ) : null}
                 </div>
-                {/* Mobile session panel: slide-up overlay toggled by
-                    MobileSessionPanelTrigger. Mounted outside the pill
-                    conditional so the pill's trigger works too. */}
-                {isMobile && <MobileSessionStatusBar />}
                 {/* Hidden host for the model/agent/variant bottom sheets. Kept
                     outside the pill conditional so an open panel survives (and
                     stays visible over) the collapsed composer. */}