opt share video link (#1835)

* feat: share video with current time position preference

* simplify


---------

Co-authored-by: dom <githubaccount56556@proton.me>

lib/pages/video/introduction/ugc/controller.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:math';
 
+import 'package:PiliPlus/common/widgets/button/icon_button.dart';
 import 'package:PiliPlus/common/widgets/scroll_physics.dart';
 import 'package:PiliPlus/http/api.dart';
 import 'package:PiliPlus/http/constants.dart';
@@ -299,8 +300,8 @@ class UgcIntroController extends CommonIntroController with ReloadMixin {
   @override
   void actionShareVideo(BuildContext context) {
     final videoDetail = this.videoDetail.value;
-    String videoUrl =
-        '${HttpString.baseUrl}/video/$bvid${videoDetailCtr.playedTimePos}';
+    final playedTimePos = videoDetailCtr.playedTimePos;
+    String videoUrl = '${HttpString.baseUrl}/video/$bvid';
     showDialog(
       context: context,
       builder: (_) => AlertDialog(
@@ -319,6 +320,16 @@ class UgcIntroController extends CommonIntroController with ReloadMixin {
                 Get.back();
                 Utils.copyText(videoUrl);
               },
+              trailing: playedTimePos.isNotEmpty
+                  ? iconButton(
+                      tooltip: '精确分享',
+                      icon: const Icon(Icons.timer_outlined),
+                      onPressed: () {
+                        Get.back();
+                        Utils.copyText('$videoUrl$playedTimePos');
+                      },
+                    )
+                  : null,
             ),
             ListTile(
               dense: true,