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/views/FilesView.tsx

@@ -725,7 +725,9 @@ export const FilesView: React.FC<FilesViewProps> = ({ mode = 'full' }) => {
 
   const currentDirectory = useEffectiveDirectory() ?? '';
   const root = normalizePath(currentDirectory.trim());
-  const showEditorTabsRow = isMobile || mode !== 'editor-only';
+  // editor-only hosts (desktop context panel, the mobile Files surface) bring
+  // their own chrome — the open-file tabs row is redundant there.
+  const showEditorTabsRow = mode !== 'editor-only';
   const suppressFileLoadingIndicator = mode === 'editor-only' && !isMobile;
   const searchFiles = useFileSearchStore((state) => state.searchFiles);
   const gitStatus = useGitStatus(currentDirectory);
@@ -3753,10 +3755,13 @@ export const FilesView: React.FC<FilesViewProps> = ({ mode = 'full' }) => {
         </div>
         ) : null}
 
-        {/* Row 2: Docked editor toolbar (expanded). Desktop-only opt-in. */}
-        {settingsExpandedEditorToolbar && !isMobile && selectedFile ? (
+        {/* Row 2: Docked editor toolbar (expanded). Desktop opt-in; ALWAYS on
+            for mobile — floating hover controls don't work with touch. */}
+        {(settingsExpandedEditorToolbar || isMobile) && selectedFile ? (
           <div className="flex min-w-0 items-center gap-3 border-t border-border/40 bg-[var(--surface-subtle)] px-3 py-1">
-            {displaySelectedPath ? (
+            {/* Mobile hosts already show the file name in their own header;
+                a truncated duplicate here just eats toolbar width. */}
+            {displaySelectedPath && !isMobile ? (
               <span
                 className="min-w-0 flex-1 truncate typography-meta text-muted-foreground"
                 title={displaySelectedPath}
@@ -3773,7 +3778,7 @@ export const FilesView: React.FC<FilesViewProps> = ({ mode = 'full' }) => {
       </div>
 
       <div className="flex-1 min-h-0 min-w-0 relative">
-        {selectedFile && !isSearchOpen && !(settingsExpandedEditorToolbar && !isMobile) && (
+        {selectedFile && !isSearchOpen && !(settingsExpandedEditorToolbar || isMobile) && (
           <div
             ref={floatingToolbarRef}
             className="absolute right-3 top-3 z-30"