fix(player): 评论面板自适应高度并只顶起输入框

lib/pages/player/widgets/comment_tile.dart

@@ -46,7 +46,7 @@ class CommentTile extends StatelessWidget {
         : comment.nickname;
     return Padding(
       key: Key('comment-item-${comment.id}'),
-      padding: const EdgeInsets.only(top: 12, bottom: 14),
+      padding: const EdgeInsets.only(top: 10, bottom: 12),
       child: Row(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
@@ -125,7 +125,7 @@ class CommentTile extends StatelessWidget {
                   ),
                 if (comment.createdAt != null || !isReply)
                   Padding(
-                    padding: const EdgeInsets.only(top: 6),
+                    padding: const EdgeInsets.only(top: 4),
                     child: _metadata(context, l10n),
                   ),
               ],

lib/pages/player/widgets/drama_comments_sheet.dart

@@ -29,6 +29,8 @@ const double _sendButtonSize = 38;
 const double _sheetRadius = 20;
 const double _headerHeight = 44;
 const double _replyIndent = 52;
+const double _composerTopGap = 8;
+const double _replyBannerHeight = 46;
 
 /// 服务端评论底部弹窗：匿名列表、游标翻页、回复、举报和本人删除。
 class DramaCommentsSheet extends StatefulWidget {
@@ -178,114 +180,170 @@ class _DramaCommentsSheetState extends State<DramaCommentsSheet> {
 
   @override
   Widget build(BuildContext context) {
-    final available =
-        MediaQuery.sizeOf(context).height -
-        MediaQuery.viewInsetsOf(context).bottom -
-        24;
-    return Padding(
-      padding: EdgeInsets.only(bottom: MediaQuery.viewInsetsOf(context).bottom),
-      child: Container(
-        key: const Key('player-comments-sheet'),
-        decoration: const BoxDecoration(
-          color: AppColors.card,
-          borderRadius: BorderRadius.vertical(
-            top: Radius.circular(_sheetRadius),
-          ),
-        ),
-        child: SizedBox(
-          height: available.clamp(_minSheetHeight, _maxSheetHeight),
-          child: SafeArea(
-            top: false,
-            child: Padding(
-              padding: const EdgeInsets.fromLTRB(12, 4, 12, 12),
-              child: ListenableBuilder(
-                listenable: _controller,
-                builder: (context, _) => _content(context),
+    final screenLimit = MediaQuery.sizeOf(context).height - 24;
+    final maxHeight = screenLimit < _maxSheetHeight
+        ? screenLimit
+        : _maxSheetHeight;
+    return Container(
+      key: const Key('player-comments-sheet'),
+      decoration: const BoxDecoration(
+        color: AppColors.card,
+        borderRadius: BorderRadius.vertical(top: Radius.circular(_sheetRadius)),
+      ),
+      child: SafeArea(
+        top: false,
+        child: ListenableBuilder(
+          listenable: _controller,
+          builder: (context, _) {
+            final minHeight = _controller.comments.isEmpty
+                ? (_minSheetHeight < maxHeight ? _minSheetHeight : maxHeight)
+                : 0.0;
+            return ConstrainedBox(
+              key: const Key('comment-sheet-constraints'),
+              constraints: BoxConstraints(
+                minHeight: minHeight,
+                maxHeight: maxHeight,
               ),
-            ),
-          ),
+              child: Padding(
+                padding: const EdgeInsets.symmetric(horizontal: 16),
+                child: _content(context, maxHeight),
+              ),
+            );
+          },
         ),
       ),
     );
   }
 
-  Widget _content(BuildContext context) {
+  Widget _content(BuildContext context, double maxHeight) {
     final l10n = AppLocalizations.of(context)!;
     final count = _serverCount ?? _controller.exactCount;
-    return Column(
-      crossAxisAlignment: CrossAxisAlignment.start,
+    final replyReserve = _replyTo == null ? 0.0 : _replyBannerHeight;
+    final listMaxHeight =
+        maxHeight -
+        _headerHeight -
+        _composerHeight -
+        _composerTopGap -
+        replyReserve;
+    return Stack(
       children: [
-        SizedBox(
-          height: _headerHeight,
-          width: double.infinity,
-          child: Stack(
-            alignment: Alignment.center,
-            children: [
-              Text(
-                count == null ? l10n.comments : l10n.commentsWithCount(count),
-                key: const Key('comment-count-label'),
-                textAlign: TextAlign.center,
-                style: const TextStyle(
-                  color: AppColors.onSurface,
-                  fontSize: 16,
-                  fontWeight: FontWeight.w600,
-                ),
-              ),
-              Positioned(
-                left: 0,
-                child: SizedBox.square(
-                  dimension: 44,
-                  child: IconButton(
-                    key: const Key('player-comments-close'),
-                    tooltip: l10n.close,
-                    padding: EdgeInsets.zero,
-                    onPressed: () => Navigator.pop(context),
-                    icon: const Icon(
-                      Icons.keyboard_arrow_down_rounded,
-                      size: 24,
-                      color: AppColors.cream,
+        Column(
+          key: const Key('comment-sheet-content'),
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            SizedBox(
+              height: _headerHeight,
+              width: double.infinity,
+              child: Stack(
+                alignment: Alignment.center,
+                children: [
+                  Text(
+                    count == null
+                        ? l10n.comments
+                        : l10n.commentsWithCount(count),
+                    key: const Key('comment-count-label'),
+                    textAlign: TextAlign.center,
+                    style: const TextStyle(
+                      color: AppColors.onSurface,
+                      fontSize: 16,
+                      fontWeight: FontWeight.w600,
                     ),
                   ),
-                ),
+                  Positioned(
+                    left: 0,
+                    child: SizedBox.square(
+                      dimension: 44,
+                      child: IconButton(
+                        key: const Key('player-comments-close'),
+                        tooltip: l10n.close,
+                        padding: EdgeInsets.zero,
+                        onPressed: () => Navigator.pop(context),
+                        icon: const Icon(
+                          Icons.keyboard_arrow_down_rounded,
+                          size: 24,
+                          color: AppColors.cream,
+                        ),
+                      ),
+                    ),
+                  ),
+                ],
               ),
-            ],
+            ),
+            ConstrainedBox(
+              constraints: BoxConstraints(
+                maxHeight: listMaxHeight < 0 ? 0 : listMaxHeight,
+              ),
+              child: _list(l10n),
+            ),
+            if (_replyTo != null) _replyBanner(l10n, _replyTo!),
+            const SizedBox(
+              height: _composerHeight + _composerTopGap,
+            ),
+          ],
+        ),
+        Positioned(
+          left: 0,
+          right: 0,
+          bottom: 0,
+          child: AnimatedPadding(
+            duration: const Duration(milliseconds: 150),
+            curve: Curves.easeOut,
+            padding: EdgeInsets.only(
+              bottom: MediaQuery.viewInsetsOf(context).bottom,
+            ),
+            child: Padding(
+              padding: const EdgeInsets.only(top: _composerTopGap),
+              child: _composer(l10n),
+            ),
           ),
         ),
-        const SizedBox(height: 8),
-        Expanded(child: _list(l10n)),
-        if (_replyTo != null) _replyBanner(l10n, _replyTo!),
-        _composer(l10n),
       ],
     );
   }
 
   Widget _list(AppLocalizations l10n) {
+    final keyboardHeight = MediaQuery.viewInsetsOf(context).bottom;
     if (_controller.loading && _controller.comments.isEmpty) {
-      return const Center(
-        child: CircularProgressIndicator(key: Key('comment-list-loading')),
+      return const Padding(
+        padding: EdgeInsets.only(top: 4),
+        child: Center(
+          child: CircularProgressIndicator(key: Key('comment-list-loading')),
+        ),
       );
     }
     if (_controller.error != null && _controller.comments.isEmpty) {
-      return EmptyState(
-        key: const Key('comment-list-error'),
-        icon: Icons.cloud_off_rounded,
-        title: errorText(l10n, _controller.error, l10n.commentsLoadFailed),
-        actionLabel: l10n.retry,
-        actionKey: const Key('comment-list-retry'),
-        onAction: _controller.load,
-        compact: true,
+      return Padding(
+        padding: const EdgeInsets.only(top: 4),
+        child: EmptyState(
+          key: const Key('comment-list-error'),
+          icon: Icons.cloud_off_rounded,
+          title: errorText(l10n, _controller.error, l10n.commentsLoadFailed),
+          actionLabel: l10n.retry,
+          actionKey: const Key('comment-list-retry'),
+          onAction: _controller.load,
+          compact: true,
+        ),
       );
     }
     if (_controller.comments.isEmpty) {
-      return EmptyState(
-        key: const Key('comment-list-empty'),
-        icon: Icons.chat_bubble_outline_rounded,
-        title: l10n.noComments,
-        compact: true,
+      return Padding(
+        padding: const EdgeInsets.only(top: 4),
+        child: EmptyState(
+          key: const Key('comment-list-empty'),
+          icon: Icons.chat_bubble_outline_rounded,
+          title: l10n.noComments,
+          compact: true,
+        ),
       );
     }
     return ListView.builder(
       key: const Key('comment-list'),
+      shrinkWrap: true,
+      padding: EdgeInsets.only(
+        top: 4,
+        bottom: _composerHeight + keyboardHeight,
+      ),
       itemCount: _controller.comments.length + 1,
       itemBuilder: (context, index) {
         if (index == _controller.comments.length) return _footer(l10n);
@@ -319,26 +377,31 @@ class _DramaCommentsSheetState extends State<DramaCommentsSheet> {
     return const SizedBox(height: 8);
   }
 
-  Widget _replyBanner(AppLocalizations l10n, DramaComment replyTo) => Padding(
-    padding: const EdgeInsets.only(bottom: 6),
-    child: Row(
-      children: [
-        Expanded(
-          child: Text(
-            l10n.replyingTo(
-              replyTo.nickname.isEmpty ? l10n.anonymousUser : replyTo.nickname,
+  Widget _replyBanner(AppLocalizations l10n, DramaComment replyTo) => SizedBox(
+    height: _replyBannerHeight,
+    child: Padding(
+      padding: const EdgeInsets.only(bottom: 6),
+      child: Row(
+        children: [
+          Expanded(
+            child: Text(
+              l10n.replyingTo(
+                replyTo.nickname.isEmpty
+                    ? l10n.anonymousUser
+                    : replyTo.nickname,
+              ),
+              style: const TextStyle(color: AppColors.muted, fontSize: 12),
             ),
-            style: const TextStyle(color: AppColors.muted, fontSize: 12),
           ),
-        ),
-        IconButton(
-          key: const Key('comment-cancel-reply'),
-          tooltip: l10n.cancelReply,
-          onPressed: _cancelReply,
-          visualDensity: VisualDensity.compact,
-          icon: const Icon(Icons.close_rounded, size: 18),
-        ),
-      ],
+          IconButton(
+            key: const Key('comment-cancel-reply'),
+            tooltip: l10n.cancelReply,
+            onPressed: _cancelReply,
+            visualDensity: VisualDensity.compact,
+            icon: const Icon(Icons.close_rounded, size: 18),
+          ),
+        ],
+      ),
     ),
   );