视频全屏时自动隐藏原生标题栏

[OliverArcher]

TL;DR

Windows 与 Linux 上，原生标题栏会在窗口进入全屏时压在画面顶部、退出全屏后行为又跟用户偏好对不上。这个 PR 让标题栏在进入全屏前自动隐藏、退出全屏后按用户偏好恢复。macOS 上原生标题栏本就永远隐藏，所以这两个调用是 no-op，行为不变。

改动

三处文件改动，最小化补丁：

• lib/services/platform/display_mode_service.dart：在 applyVideoFullscreen(true) 之前调 setTitleBarStyle(hidden)，在 applyVideoFullscreen(false) 之后按 showWindowButton 偏好恢复（macOS 走 defaultTargetPlatform == macOS 的旁路，永远 hidden）。新拆出的两个私有方法 _hideTitleBarForFullscreen() / _restoreTitleBarAfterFullscreen() 跟现有 _attempt() 错误处理一致。2.3.6 把 enter/exitFullScreen 重写成了单参数的 applyVideoFullscreen(bool)，本补丁跟着这套新签名走，并切到 defaultTargetPlatform 而不是 Platform.isXxx，跟同文件其他判断风格一致。
• lib/services/storage/settings_keys.dart：showWindowButton 的默认值从 false 改成 true，让全新安装的用户默认显示标题栏（也就是说不打开全屏时看得见标题栏、进入全屏时自动隐藏）。
• lib/pages/settings/theme_settings_page.dart：删掉"外观 → 使用系统标题栏"那一段设置入口，连同 showWindowButton 字段和 initState 读取都删掉。代码仍然读 showWindowButton，所以已经手动设过 false 的旧用户继续保留隐藏。

为什么不留在设置里

showWindowButton 这个开关之前只是用来选要不要显示原生标题栏，对全屏行为没有影响。把它从设置里挪走、把默认值反过来、并把全屏前后逻辑写进代码之后，全屏体验是统一的，没有用户能选错。showWindowButton 这个 setting key 保留，所有现有用户数据不受影响。

验证

• Windows 11 + Flutter 3.47.5 + MSVC 19.44 (VS 2022 17.14) 上 flutter build windows --release 干净通过。
• 启动后默认显示标题栏；进入全屏标题栏立即消失、贴合视频顶部不留黑条；按 Esc 退出全屏，标题栏按原偏好恢复。
• macOS / Linux 上 setTitleBarStyle 是 no-op，行为不变。

适用范围

补丁基线是 2.3.6。如果 display_mode_service.dart 或 settings_keys.dart 后续重构，本补丁需要相应迁移。

[kilo-code-bot]

WARNING: Flipping this default changes behavior for existing users too — including macOS — and there is no longer a way to change it back

GStorage.getSetting returns the default whenever nothing is stored, so this isn't only a new-install change. Any existing user who never touched the toggle goes from false to true after upgrading:

• Windows/Linux: the native title bar comes back, and the in-app CloseButton in SysAppBar (lib/bean/appbar/sys_app_bar.dart:36) and popular_page.dart:250 disappears.
• macOS: main.dart:84 now passes windowButtonVisibility: true, so the native traffic-light buttons show up. SysAppBar.preferredSize / info_page.dart:366-374 also add a 22px top offset. That goes against the PR description's claim that macOS behavior is unchanged.

theme_settings_page.dart also removes the "使用系统标题栏" toggle. So neither these upgraded users nor anyone who set it manually can change the preference in the UI anymore; the key is only reachable through settings import/export. Options: keep the toggle, only apply the new default to fresh installs (e.g. a migration that stores false for existing installs), or keep macOS on its old behavior.

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Reply with @kilocode-bot fix it to have Kilo Code address this issue.

[kilo-code-bot]

Code Review Summary

Status: 1 Issue Found | Recommendation: Address before merge

Overview

Severity	Count
CRITICAL	0
WARNING	1
SUGGESTION	0

Issue Details (click to expand)

WARNING

File	Line	Issue
lib/services/storage/settings_keys.dart	339	Changing the showWindowButton default to true also affects existing users who never set it, including on macOS (traffic lights plus a 22px offset). Because the settings toggle is removed in theme_settings_page.dart, users can no longer change it back.

Files Reviewed (3 files)

• lib/services/platform/display_mode_service.dart - 0 issues
• lib/services/storage/settings_keys.dart - 1 issue
• lib/pages/settings/theme_settings_page.dart - 0 issues (toggle removal covered in the settings_keys finding)

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_{Reviewed by claude-opus-5.5 · Input: 0 · Output: 0 · Cached: 0}