chore(deps): update app_links and package_info_plus to latest major versions

Upgrade packages:
- app_links: ^6.1.4 → ^7.0.0 (backward compatible with v6)
- package_info_plus: ^8.0.0 → ^9.0.0 (build tooling only, no Dart API changes)

Bump Android build tooling to latest Flutter 3.38-compatible versions:
- AGP: 8.9.1 → 8.11.1
- Gradle: 8.12 → 8.14
- Kotlin: 2.1.0 → 2.2.20

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

pubspec.lock

@@ -13,10 +13,10 @@ packages:
     dependency: "direct main"
     description:
       name: app_links
-      sha256: "5f88447519add627fe1cbcab4fd1da3d4fed15b9baf29f28b22535c95ecee3e8"
+      sha256: "3462d9defc61565fde4944858b59bec5be2b9d5b05f20aed190adb3ad08a7abc"
       url: "https://pub.dev"
     source: hosted
-    version: "6.4.1"
+    version: "7.0.0"
   app_links_linux:
     dependency: transitive
     description:
@@ -588,10 +588,10 @@ packages:
     dependency: "direct main"
     description:
       name: package_info_plus
-      sha256: "16eee997588c60225bda0488b6dcfac69280a6b7a3cf02c741895dd370a02968"
+      sha256: f69da0d3189a4b4ceaeb1a3defb0f329b3b352517f52bed4290f83d4f06bc08d
       url: "https://pub.dev"
     source: hosted
-    version: "8.3.1"
+    version: "9.0.0"
   package_info_plus_platform_interface:
     dependency: transitive
     description: