refactor: standardize Dart and Android config across all 54 apps

- Bump all apps to sdk >=3.0.0 <4.0.0 and add flutter_lints + a shared
  analysis_options.yaml to every app (flutter analyze is now green repo-wide)
- Fix real compile errors in firebase_google_authentication and image_editor,
  plus deprecated APIs (Matrix4, SvgPicture.color, textScaleFactor),
  missing async 'mounted' guards, and misc lints via dart fix + manual fixes
- Align pubspec 'name' with each folder and Android namespace/applicationId
  with the documented github.nisrulz.* convention
- Convert bmi_calculator from a legacy Flutter module to a standard app
  with a proper android/ scaffold; fix missing android:exported in launcher
  manifests across 22 apps so all Android builds pass
- Untrack generated build files (GeneratedPluginRegistrant,
  .flutter-plugins-dependencies) and ignore them

google_signin/.flutter-plugins-dependencies

@@ -1 +0,0 @@
-{"info":"This is a generated file; do not edit or check into version control.","plugins":{"ios":[{"name":"firebase_auth","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/firebase_auth-6.5.7/","native_build":true,"dependencies":["firebase_core"],"dev_dependency":false},{"name":"firebase_core","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/firebase_core-4.13.0/","native_build":true,"dependencies":[],"dev_dependency":false},{"name":"google_sign_in_ios","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/google_sign_in_ios-6.3.0/","shared_darwin_source":true,"native_build":true,"dependencies":[],"dev_dependency":false}],"android":[{"name":"firebase_auth","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/firebase_auth-6.5.7/","native_build":true,"dependencies":["firebase_core"],"dev_dependency":false},{"name":"firebase_core","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/firebase_core-4.13.0/","native_build":true,"dependencies":[],"dev_dependency":false},{"name":"google_sign_in_android","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/google_sign_in_android-7.2.16/","native_build":true,"dependencies":[],"dev_dependency":false}],"macos":[{"name":"firebase_auth","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/firebase_auth-6.5.7/","native_build":true,"dependencies":["firebase_core"],"dev_dependency":false},{"name":"firebase_core","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/firebase_core-4.13.0/","native_build":true,"dependencies":[],"dev_dependency":false},{"name":"google_sign_in_ios","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/google_sign_in_ios-6.3.0/","shared_darwin_source":true,"native_build":true,"dependencies":[],"dev_dependency":false}],"linux":[],"windows":[{"name":"firebase_auth","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/firebase_auth-6.5.7/","native_build":true,"dependencies":["firebase_core"],"dev_dependency":false},{"name":"firebase_core","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/firebase_core-4.13.0/","native_build":true,"dependencies":[],"dev_dependency":false}],"web":[{"name":"firebase_auth_web","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/firebase_auth_web-6.2.6/","dependencies":["firebase_core_web"],"dev_dependency":false},{"name":"firebase_core_web","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/firebase_core_web-3.10.0/","dependencies":[],"dev_dependency":false},{"name":"google_sign_in_web","path":"/Users/nishantsrivastava/.pub-cache/hosted/pub.dev/google_sign_in_web-1.1.3/","dependencies":[],"dev_dependency":false}]},"dependencyGraph":[{"name":"firebase_auth","dependencies":["firebase_auth_web","firebase_core"]},{"name":"firebase_auth_web","dependencies":["firebase_core","firebase_core_web"]},{"name":"firebase_core","dependencies":["firebase_core_web"]},{"name":"firebase_core_web","dependencies":[]},{"name":"google_sign_in","dependencies":["google_sign_in_android","google_sign_in_ios","google_sign_in_web"]},{"name":"google_sign_in_android","dependencies":[]},{"name":"google_sign_in_ios","dependencies":[]},{"name":"google_sign_in_web","dependencies":[]}],"date_created":"2026-08-16 19:48:53.354040","version":"3.47.0","swift_package_manager_enabled":{"ios":false,"macos":false}}

google_signin/analysis_options.yaml

@@ -0,0 +1,23 @@
+# Lint rules for Flutter apps.
+# See https://dart.dev/guides/language/analysis-options
+include: package:flutter_lints/flutter.yaml
+
+analyzer:
+  exclude:
+    - build/**
+    - android/**
+    - ios/**
+    - web/**
+    - windows/**
+    - macos/**
+    - linux/**
+
+linter:
+  rules:
+    # Noise in small sample apps; keep the code readable.
+    avoid_print: false
+    avoid_unnecessary_containers: false
+    file_names: false
+    library_private_types_in_public_api: false
+    non_constant_identifier_names: false
+    strict_top_level_inference: false

google_signin/android/app/src/main/AndroidManifest.xml

@@ -18,6 +18,7 @@
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name="io.flutter.embedding.android.FlutterActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale"

google_signin/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java

@@ -1,34 +0,0 @@
-package io.flutter.plugins;
-
-import androidx.annotation.Keep;
-import androidx.annotation.NonNull;
-import io.flutter.Log;
-
-import io.flutter.embedding.engine.FlutterEngine;
-
-/**
- * Generated file. Do not edit.
- * This file is generated by the Flutter tool based on the
- * plugins that support the Android platform.
- */
-@Keep
-public final class GeneratedPluginRegistrant {
-  private static final String TAG = "GeneratedPluginRegistrant";
-  public static void registerWith(@NonNull FlutterEngine flutterEngine) {
-    try {
-      flutterEngine.getPlugins().add(new io.flutter.plugins.firebase.auth.FlutterFirebaseAuthPlugin());
-    } catch (Exception e) {
-      Log.e(TAG, "Error registering plugin firebase_auth, io.flutter.plugins.firebase.auth.FlutterFirebaseAuthPlugin", e);
-    }
-    try {
-      flutterEngine.getPlugins().add(new io.flutter.plugins.firebase.core.FlutterFirebaseCorePlugin());
-    } catch (Exception e) {
-      Log.e(TAG, "Error registering plugin firebase_core, io.flutter.plugins.firebase.core.FlutterFirebaseCorePlugin", e);
-    }
-    try {
-      flutterEngine.getPlugins().add(new io.flutter.plugins.googlesignin.GoogleSignInPlugin());
-    } catch (Exception e) {
-      Log.e(TAG, "Error registering plugin google_sign_in_android, io.flutter.plugins.googlesignin.GoogleSignInPlugin", e);
-    }
-  }
-}

google_signin/pubspec.yaml

@@ -17,6 +17,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  flutter_lints: ^6.0.0
 
 
 # For information on the generic Dart part of this file, see the