chore(deps): move flutter_web_auth_2 and flutter_secure_storage to stable releases

Move auth-critical packages from pre-release pins to stable:
- flutter_web_auth_2: 5.0.0-alpha.3 → ^5.0.1
- flutter_secure_storage: 10.0.0-beta.4 → ^10.0.0
- oauth2_client: 4.2.0 → 4.2.3 (auto-resolved, was blocked by pre-release pins)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

pubspec.lock

@@ -282,26 +282,26 @@ packages:
     dependency: "direct main"
     description:
       name: flutter_secure_storage
-      sha256: f7eceb0bc6f4fd0441e29d43cab9ac2a1c5ffd7ea7b64075136b718c46954874
+      sha256: da922f2aab2d733db7e011a6bcc4a825b844892d4edd6df83ff156b09a9b2e40
       url: "https://pub.dev"
     source: hosted
-    version: "10.0.0-beta.4"
+    version: "10.0.0"
   flutter_secure_storage_darwin:
     dependency: transitive
     description:
       name: flutter_secure_storage_darwin
-      sha256: "81ef5abfb9cbeb78110d8043ba29f0b36cd7ffa989baa1b2d9482542b2200051"
+      sha256: "8878c25136a79def1668c75985e8e193d9d7d095453ec28730da0315dc69aee3"
       url: "https://pub.dev"
     source: hosted
-    version: "0.1.1"
+    version: "0.2.0"
   flutter_secure_storage_linux:
     dependency: transitive
     description:
       name: flutter_secure_storage_linux
-      sha256: "9b4b73127e857cd3117d43a70fa3dddadb6e0b253be62e6a6ab85caa0742182c"
+      sha256: "2b5c76dce569ab752d55a1cee6a2242bcc11fdba927078fb88c503f150767cda"
       url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
+    version: "3.0.0"
   flutter_secure_storage_platform_interface:
     dependency: transitive
     description:
@@ -343,10 +343,10 @@ packages:
     dependency: "direct main"
     description:
       name: flutter_web_auth_2
-      sha256: "2483d1fd3c45fe1262446e8d5f5490f01b864f2e7868ffe05b4727e263cc0182"
+      sha256: "432ff8c7b2834eaeec3378d99e24a0210b9ac2f453b3f7a7d739a5c09069fba3"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.0-alpha.3"
+    version: "5.0.1"
   flutter_web_auth_2_platform_interface:
     dependency: transitive
     description:
@@ -580,10 +580,10 @@ packages:
     dependency: "direct main"
     description:
       name: oauth2_client
-      sha256: d6a146049f36ef2da32bdc7a7a9e5671a0e66ea596d8f70a26de4cddfcab4d2e
+      sha256: "6667da827518047d99ce82cf7b23043ea4a4bac99fc6681d4a1bf6ee1dd9579f"
       url: "https://pub.dev"
     source: hosted
-    version: "4.2.0"
+    version: "4.2.3"
   package_info_plus:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -26,8 +26,8 @@ dependencies:
 
   # Auth, storage, prefs
   oauth2_client: ^4.2.0
-  flutter_web_auth_2: 5.0.0-alpha.3
-  flutter_secure_storage: 10.0.0-beta.4
+  flutter_web_auth_2: ^5.0.1
+  flutter_secure_storage: ^10.0.0
 
   # Persistence
   shared_preferences: ^2.2.2