Rebuild Noo as a full Nextcloud client: auth, media, and Material You UI

Replaces the starter template with Login Flow v2 auth, WebDAV-backed
Files/Photos/Activity tabs, a swipeable media viewer with PDF/text/video
preview, Material You dynamic theming, a frosted-glass floating nav bar,
and a rebranded app icon/identity (com.example -> family.nasa).

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

pubspec.yaml

@@ -36,11 +36,23 @@ dependencies:
   cupertino_icons: ^1.0.8
   provider: ^6.1.2
   google_fonts: ^6.2.1
+  dynamic_color: ^1.7.0
   http: ^1.2.1
   xml: ^6.5.0
   intl: ^0.19.0
   path: ^1.9.0
-  crypto: ^3.0.3
+  flutter_secure_storage: ^11.1.1
+  url_launcher: ^6.3.1
+  dio: ^5.11.1
+  path_provider: ^2.1.5
+  open_file: ^3.5.10
+  file_saver: ^0.2.14
+  video_player: ^2.9.5
+  pdfx: ^2.9.2
+  file_picker: ^13.1.0
+  share_plus: ^13.3.0
+  material_symbols_icons: ^4.2960.0
+  shared_preferences: ^2.5.5
 
 dev_dependencies:
   flutter_test:
@@ -52,6 +64,13 @@ dev_dependencies:
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
   flutter_lints: ^6.0.0
+  flutter_launcher_icons: ^0.14.4
+
+flutter_launcher_icons:
+  android: true
+  image_path: "assets/icon/app_icon.png"
+  adaptive_icon_background: "#3D5AD1"
+  adaptive_icon_foreground: "assets/icon/app_icon_foreground.png"
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec