Add Trash/Shares/Recent tabs, file sharing, Details sheet, and rebrand to Noo

Major additions since the initial rebuild:
- New tabs: Trash, Shares, Recent, configurable tab visibility/order/default
- Nextcloud sharing: search users/teams, internal link, email shares,
  public links, "others with access" - in its own Share bottom sheet
- Details bottom sheet (Info/Versions/Activity) with a persistent peek
  panel in the media viewer, reachable from selection, swipe, and the
  media viewer
- Files/Photos: tap-and-hold multi-select with a sticky selection toolbar,
  swipe actions (favorite/delete/share), sticky sort/filter controls,
  list/grid views, breadcrumb chips, whole-account Photos view
- Media viewer: pinch/double-tap zoom on images, predictive-back support,
  fixed PDF zoom-out floor
- Settings: Material You theming incl. AMOLED black, configurable bottom
  bar tabs, swipe actions, media seek bar style, and folder-listing cache
  policy (never/periodic/manual) to cut down on refetching
- Login flow moved to an in-app Chrome Custom Tab with retry-tolerant
  polling
- Replaced ad hoc widgets with native Material 3 equivalents (toggle
  IconButtons, SliverAppBar selection toolbar, SearchBar, drag handles)
- Rebrand: app renamed to Noo throughout, package id -> dev.ayushya.noo,
  new adaptive launcher icon

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

lib/widgets/segmented_icon_toggle.dart

@@ -1,7 +1,10 @@
 import 'package:flutter/material.dart';
 
 /// A single icon button that fills with a solid circle when active —
-/// the building block for Drive-style toggle controls.
+/// the building block for Drive-style toggle controls. Thin wrapper around
+/// the native Material 3 toggle `IconButton` (its `isSelected` constructor
+/// param, not a hand-rolled Material+InkWell) so every call site here gets
+/// the built-in selected/unselected treatment for free.
 class ToggleIconButton extends StatelessWidget {
   final IconData icon;
   final bool isSelected;
@@ -20,26 +23,26 @@ class ToggleIconButton extends StatelessWidget {
   Widget build(BuildContext context) {
     final colorScheme = Theme.of(context).colorScheme;
 
-    final button = Material(
-      color: isSelected ? colorScheme.primaryContainer : Colors.transparent,
-      shape: const CircleBorder(),
-      child: InkWell(
-        onTap: onTap,
-        customBorder: const CircleBorder(),
-        child: Padding(
-          padding: const EdgeInsets.all(8),
-          child: Icon(
-            icon,
-            size: 20,
-            color: isSelected
-                ? colorScheme.onPrimaryContainer
-                : colorScheme.onSurfaceVariant,
-          ),
+    return IconButton(
+      isSelected: isSelected,
+      icon: Icon(icon, size: 20),
+      tooltip: tooltip,
+      onPressed: onTap,
+      visualDensity: VisualDensity.compact,
+      style: ButtonStyle(
+        shape: const WidgetStatePropertyAll(CircleBorder()),
+        foregroundColor: WidgetStateProperty.resolveWith(
+          (states) => states.contains(WidgetState.selected)
+              ? colorScheme.onPrimaryContainer
+              : colorScheme.onSurfaceVariant,
+        ),
+        backgroundColor: WidgetStateProperty.resolveWith(
+          (states) => states.contains(WidgetState.selected)
+              ? colorScheme.primaryContainer
+              : Colors.transparent,
         ),
       ),
     );
-
-    return tooltip != null ? Tooltip(message: tooltip!, child: button) : button;
   }
 }