refactor: Add explicit types and adopt modern Dart syntax

This commit introduces several code quality improvements by adding explicit type annotations and adopting modern Dart syntax.

- **Type Safety**:
  - Added explicit `void` return types to methods that previously had implicit `dynamic` returns (e.g., `modify` methods in `continuous`, `durability`, `wetness`, and `freshness` item components, `setGameSave`/`deleteGameSave` in `db.dart`, and `reload` in `foundation.dart`).
  - Specified `double` and `void` return types for operators in `AttributeManagerProtocolX`.
  - Made `_key2Translated` and `_fallbackKey2Translated` maps in `Mod` final.

- **Modernization**:
  - Migrated to super-initializer parameters in widget constructors (`Top`, `_LocalTop`, `_IconsXData`).
  - Updated `AlertDialog` to use `context.theme.dialogTheme.backgroundColor` instead of the deprecated `dialogBackgroundColor`.
  - Corrected a typo in `ColorUtils.mergeColors` from `a.opacity` to `a.a`.
  - Updated the package name in `r.dart` from `net.liplum.escape_wild.flutter` to `net.liplum.escape_wild`.

Author: liplum

lib/core/attribute/attribute.dart

@@ -85,9 +85,9 @@ abstract class AttributeManagerProtocol {
 }
 
 extension AttributeManagerProtocolX on AttributeManagerProtocol {
-  operator [](Attr attr) => getAttr(attr);
+  double operator [](Attr attr) => getAttr(attr);
 
-  operator []=(Attr attr, double value) => setAttr(attr, value);
+  void operator []=(Attr attr, double value) => setAttr(attr, value);
 
   double get health => this[Attr.health];
 
@@ -312,5 +312,5 @@ class AttrModifierBuilder {
 }
 
 extension AttrModifierBuilderX on AttrModifierBuilder {
-  operator <<(AttrModifier modifier) => add(modifier);
+  void operator <<(AttrModifier modifier) => add(modifier);
 }

lib/core/item/continuous/continuous.dart

@@ -66,7 +66,7 @@ class ContinuousModifyMassComp extends ItemComp {
     modify(stack, delta, deltaPerMinute);
   }
 
-  static modify(ItemStack stack, Ts timePassed, double deltaPerMinute) {
+  static void modify(ItemStack stack, Ts timePassed, double deltaPerMinute) {
     final totalDelta = deltaPerMinute * timePassed.minutes;
     if (stack.meta.mergeable) {
       stack.mass = stack.stackMass + totalDelta.toInt();

lib/core/item/durability/durability.dart

@@ -140,7 +140,7 @@ class ContinuousModifyDurabilityComp extends ItemComp {
     modify(stack, delta, deltaPerMinute, wetFactor: wetFactor);
   }
 
-  static modify(ItemStack stack, Ts timePassed, double deltaPerMinute, {double wetFactor = 0.0}) {
+  static void modify(ItemStack stack, Ts timePassed, double deltaPerMinute, {double wetFactor = 0.0}) {
     var totalDelta = deltaPerMinute * timePassed.minutes;
     final comp = DurabilityComp.of(stack);
     if (comp != null) {

lib/core/item/freshness/freshness.dart

@@ -142,7 +142,7 @@ class ContinuousModifyFreshnessComp extends ItemComp {
     modify(stack, delta, deltaPerMinute, wetFactor: wetFactor);
   }
 
-  static modify(ItemStack stack, Ts timePassed, double deltaPerMinute, {double wetFactor = 0.0}) {
+  static void modify(ItemStack stack, Ts timePassed, double deltaPerMinute, {double wetFactor = 0.0}) {
     var totalDelta = deltaPerMinute * timePassed.minutes;
     final comp = FreshnessComp.of(stack);
     if (comp != null) {

lib/core/item/wetness/wetness.dart

@@ -112,7 +112,7 @@ class ContinuousModifyWetnessComp extends ItemComp {
     modify(stack, delta, deltaPerMinute);
   }
 
-  static modify(ItemStack stack, Ts timePassed, double deltaPerMinute) {
+  static void modify(ItemStack stack, Ts timePassed, double deltaPerMinute) {
     final totalDelta = deltaPerMinute * timePassed.minutes;
     final comp = WetnessComp.of(stack);
     if (comp != null) {

lib/core/mod/mod.dart

@@ -33,10 +33,10 @@ class Mod implements ModProtocol {
 
   Mod(this.modId);
 
-  var _key2Translated = <String, String>{};
+  final _key2Translated = <String, String>{};
 
   /// Used when key not found in current locale.
-  var _fallbackKey2Translated = <String, String>{};
+  final _fallbackKey2Translated = <String, String>{};
 
   @override
   String decorateRegisterName(String name) => "$modId-$name";

lib/db.dart

@@ -16,9 +16,9 @@ class DBImpl {
 
   String? getGameSave({int slot = 0}) => $gameSave.get(slot);
 
-  setGameSave(String save, {int slot = 0}) => $gameSave.put(slot, save);
+  Future<void> setGameSave(String save, {int slot = 0}) => $gameSave.put(slot, save);
 
-  deleteGameSave({int slot = 0}) => $gameSave.delete(slot);
+  Future<void> deleteGameSave({int slot = 0}) => $gameSave.delete(slot);
 }
 
 class Preference {

lib/design/dialog.dart

@@ -292,7 +292,7 @@ class $Dialog$ extends StatelessWidget {
     } else {
       // For other platform
       dialog = AlertDialog(
-        backgroundColor: context.theme.dialogBackgroundColor,
+        backgroundColor: context.theme.dialogTheme.backgroundColor,
         title: title?.text(style: TextStyle(fontWeight: FontWeight.w600, color: destructive ? context.$red$ : null)),
         content: builder(context),
         actions: [

lib/design/top.dart

@@ -178,10 +178,10 @@ class Top extends StatelessWidget {
   final bool global;
 
   const Top({
-    Key? key,
+    super.key,
     required this.child,
     this.global = true,
-  }) : super(key: key);
+  });
 
   const Top.global({
     super.key,
@@ -275,9 +275,9 @@ class _LocalTop extends StatefulWidget {
   final Widget child;
 
   const _LocalTop({
-    Key? key,
+    super.key,
     required this.child,
-  }) : super(key: key);
+  });
 
   @override
   _LocalTopState createState() => _LocalTopState();

lib/foundation.dart

@@ -34,7 +34,7 @@ class Measurement {
 
   static var mass = UnitConverter.gram;
 
-  static reload() {
+  static void reload() {
     Measurement.mass = UnitConverter.getMassForName(DB.preference.getMeasurementSystemOf(PhysicalQuantity.mass.name));
   }