feat(flutter): 重构四 Tab 与浏览页

lib/pages/mine/mine_types.dart

@@ -5,7 +5,7 @@ import 'package:flutter/foundation.dart';
 import '../../core/data/models/drama.dart';
 
 /// 「我的」页与根导航之间的返回动作。
-enum MyPageAction { home, discover, resume }
+enum MyPageAction { home, discover, create, resume }
 
 /// 「我的」页导航回调；没有 `onAction` 时按独立页面处理。
 class MyPageCallbacks {

lib/pages/mine/mine_view.dart

@@ -245,8 +245,8 @@ class _MyPageState extends State<MyPage> {
       items: [
         AppBottomNavItem(
           tabKey: const Key('mine-nav-home'),
-          icon: Icons.play_circle_outline_rounded,
-          selectedIcon: Icons.play_circle_fill_rounded,
+          icon: Icons.home_outlined,
+          selectedIcon: Icons.home_rounded,
           label: l10n.homeTab,
           onTap: () => _act(MyPageAction.home),
         ),
@@ -254,9 +254,16 @@ class _MyPageState extends State<MyPage> {
           tabKey: const Key('mine-nav-discover'),
           icon: Icons.explore_outlined,
           selectedIcon: Icons.explore_rounded,
-          label: l10n.discoverTab,
+          label: l10n.theaterTab,
           onTap: () => _act(MyPageAction.discover),
         ),
+        AppBottomNavItem(
+          tabKey: const Key('mine-nav-create'),
+          icon: Icons.add_box_outlined,
+          selectedIcon: Icons.add_box_rounded,
+          label: l10n.createTab,
+          onTap: () => _act(MyPageAction.create),
+        ),
         AppBottomNavItem(
           tabKey: const Key('mine-nav-current'),
           icon: Icons.video_library_outlined,