refactor(app): Material from material_ui instead of the SDK

Flutter 3.47 moved Material and Cupertino out of the SDK into material_ui and cupertino_ui, which ship weekly. The SDK imports are deprecated from the November 2026 stable release and removed in 2027, and the strict pre-push check would block every push then. The app's one Material import now comes from material_ui ^1.5.0, so everything built from here on uses the new import.

Packages that still import package:flutter/material.dart (Serverpod's Flutter packages, later the rich-text editor) see the app's theme and localizations only through MaterialUiCompatibilityBridge, set in MaterialApp.builder. The bridge is deprecated on purpose, as a reminder to remove it, so its use carries a documented ignore until those packages have moved.

google_fonts is removed: it was unused, and by default it downloads fonts from Google at runtime, which sends every user's IP address to Google.

AGENTS.md: Material comes from material_ui.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

pubspec.lock

@@ -201,6 +201,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.9"
+  cupertino_ui:
+    dependency: transitive
+    description:
+      name: cupertino_ui
+      sha256: c23816577a1280cff409e989541767887011f8f1d8c1863a794ed308af46f2a9
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
   dart_jsonwebtoken:
     dependency: transitive
     description:
@@ -623,6 +631,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.13.0"
+  material_ui:
+    dependency: transitive
+    description:
+      name: material_ui
+      sha256: "32d98f11cf5942a095a8c3e01b03e4de3b17941437713dcf36b1088fb62e23d2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.0"
   meta:
     dependency: transitive
     description:
@@ -1462,4 +1478,4 @@ packages:
     version: "2.2.4"
 sdks:
   dart: ">=3.13.0 <4.0.0"
-  flutter: ">=3.44.4 <4.0.0"
+  flutter: ">=3.47.0 <4.0.0"