feat: 对齐常驻商城与七鱼客服交互

- 同步商城 H5 登录态与原生 token
- 完善商城/原生 tab 切换、动画及返回交互
- 修复七鱼客服键盘避让和状态栏恢复
- 调整开屏跳过按钮与登录入口交互

lib/common/theme/app_icons.dart

@@ -1,4 +1,8 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
 import 'package:flutter_remix/flutter_remix.dart';
+import 'package:not_static_icons/not_static_icons.dart' as nsi;
 
 // flutter_remix 0.0.3: icon class is FlutterRemix
 class AppIcons {
@@ -13,3 +17,183 @@ class AppIcons {
   static const arrowRight = FlutterRemix.arrow_right_s_line;
   static const arrowLeft = FlutterRemix.arrow_left_s_line;
 }
+
+enum AppBottomTabSymbol { assets, market, news, profile }
+
+class AppBottomTabIcon extends StatefulWidget {
+  const AppBottomTabIcon({
+    required this.symbol,
+    required this.selected,
+    required this.unselectedColor,
+    required this.selectedColor,
+    this.size = 24,
+    super.key,
+  });
+
+  final AppBottomTabSymbol symbol;
+  final bool selected;
+  final Color unselectedColor;
+  final Color selectedColor;
+  final double size;
+
+  @override
+  State<AppBottomTabIcon> createState() => _AppBottomTabIconState();
+}
+
+class _AppBottomTabIconState extends State<AppBottomTabIcon>
+    with TickerProviderStateMixin {
+  static const _iconMotionDuration = Duration(milliseconds: 420);
+  static const _selectionDuration = Duration(milliseconds: 140);
+  static const _popDuration = Duration(milliseconds: 260);
+  static const _scalePeak = 1.06;
+
+  final nsi.AnimatedIconController _iconController =
+      nsi.AnimatedIconController();
+  late final AnimationController _selectionController = AnimationController(
+    vsync: this,
+    duration: _selectionDuration,
+    reverseDuration: _selectionDuration,
+    value: widget.selected ? 1 : 0,
+  );
+  late final AnimationController _popController = AnimationController(
+    vsync: this,
+    duration: _popDuration,
+  );
+  late final CurvedAnimation _colorProgress = CurvedAnimation(
+    parent: _selectionController,
+    curve: Curves.easeOutCubic,
+    reverseCurve: Curves.easeOutCubic,
+  );
+  late final Animation<double> _scaleAnimation = TweenSequence<double>([
+    TweenSequenceItem(
+      tween: Tween(
+        begin: 1.0,
+        end: _scalePeak,
+      ).chain(CurveTween(curve: Curves.easeOutBack)),
+      weight: 55,
+    ),
+    TweenSequenceItem(
+      tween: Tween(
+        begin: _scalePeak,
+        end: 1.0,
+      ).chain(CurveTween(curve: Curves.easeOutCubic)),
+      weight: 45,
+    ),
+  ]).animate(_popController);
+
+  bool get _reduceMotion => MediaQuery.disableAnimationsOf(context);
+
+  @override
+  void initState() {
+    super.initState();
+    if (widget.selected) {
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        if (mounted && !_reduceMotion) _iconController.animate();
+      });
+    }
+  }
+
+  @override
+  void didUpdateWidget(covariant AppBottomTabIcon oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (widget.selected == oldWidget.selected) return;
+    if (widget.selected) {
+      if (_reduceMotion) {
+        _selectionController.value = 1;
+        _popController.value = 0;
+      } else {
+        unawaited(_selectionController.forward(from: 0));
+        unawaited(_popController.forward(from: 0));
+        _iconController.animate();
+      }
+    } else {
+      if (_reduceMotion) {
+        _selectionController.value = 0;
+      } else {
+        unawaited(_selectionController.reverse());
+      }
+      _popController.value = 0;
+      _iconController.reset();
+    }
+  }
+
+  @override
+  void dispose() {
+    _colorProgress.dispose();
+    _selectionController.dispose();
+    _popController.dispose();
+    _iconController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final reduceMotion = _reduceMotion;
+    return SizedBox.square(
+      dimension: widget.size,
+      child: AnimatedBuilder(
+        animation: Listenable.merge([_selectionController, _popController]),
+        builder: (context, _) {
+          final color = Color.lerp(
+            widget.unselectedColor,
+            widget.selectedColor,
+            reduceMotion ? (widget.selected ? 1 : 0) : _colorProgress.value,
+          )!;
+          return Transform.scale(
+            scale: reduceMotion ? 1 : _scaleAnimation.value,
+            child: _buildBottomTabIcon(
+              widget.symbol,
+              size: widget.size,
+              color: color,
+              controller: _iconController,
+            ),
+          );
+        },
+      ),
+    );
+  }
+}
+
+Widget _buildBottomTabIcon(
+  AppBottomTabSymbol symbol, {
+  required double size,
+  required Color color,
+  required nsi.AnimatedIconController controller,
+}) {
+  const strokeWidth = 2.05;
+  const duration = _AppBottomTabIconState._iconMotionDuration;
+  return switch (symbol) {
+    AppBottomTabSymbol.assets => nsi.CoinsIcon(
+      size: size,
+      color: color,
+      animationDuration: duration,
+      strokeWidth: strokeWidth,
+      interactive: false,
+      controller: controller,
+    ),
+    AppBottomTabSymbol.market => nsi.ChartCandlestickIcon(
+      size: size,
+      color: color,
+      animationDuration: duration,
+      strokeWidth: strokeWidth,
+      interactive: false,
+      controller: controller,
+    ),
+    AppBottomTabSymbol.news => nsi.BookOpenTextIcon(
+      size: size,
+      color: color,
+      animationDuration: duration,
+      strokeWidth: strokeWidth,
+      interactive: false,
+      controller: controller,
+    ),
+    AppBottomTabSymbol.profile => nsi.CircleUserIcon(
+      size: size,
+      color: color,
+      animationDuration: duration,
+      strokeWidth: strokeWidth,
+      interactive: false,
+      controller: controller,
+    ),
+  };
+}