fix: 修复文件变更栏滚动、git diff 目录展开及工作区切换互串

[Yumiue]

Summary

• 修复文件变更面板中 hunk 内部滚动阻止外层列表滚动的问题
• 修复 git diff 将未跟踪目录当作文件处理导致预览失败的问题
• 修复切换工作区后文件树与时间文案错乱的问题

修复详情

1. 文件变更栏滚动卡住 (FileChangePanel)

hunk 区域 overflowY: visible 会将纵向滚轮事件吞掉，导致鼠标悬停在 diff 上时外层列表无法滚动。改为 overflowY: hidden，并在 hunk 上显式 onWheel 转发给外层 scrollContainer。同时用 flexShrink: 0 防止 change card 被 flex 压缩，viewContainer 用 flex: 1 替代固定高度确保撑满。

2. git diff 将目录当作文件处理 (git_diff / git)

git status 返回未跟踪目录条目（如 ?? handwrite_res/）时，后端直接把目录当成文件，导致预览打开报错。在 loadGitSnapshot 中增加未跟踪目录展开逻辑，递归列出目录内的实际文件，同时遵循 gitignore 规则过滤。ReadGitDiffFile 遇到目录路径时返回明确的 "is a directory" 错误语义。

3. 工作区切换互串 + 时间乱码 (FileTreePanel / format)

切换工作区后异步请求响应乱序到达，旧工作区的数据覆盖了新工作区的文件树。用 requestToken 计数 + activeWorkspaceRef + mountedRef 三重校验丢弃过期响应，loadDir 同步防护。FileTreePanel 加 key={workspaceHash} 兜底强制重建。

relativeTime 中 "刚刚" 文案编码损坏导致乱码，同时统一缩进风格。

4.修复neocode web的启动失败问题

现在发布版本,CI会自动内嵌dist使得用户构建包版本不会npm缺失报错

5.文件变更栏美化

现在变得更好看了

Test plan

• 文件变更面板：展开多个文件后鼠标滚轮可正常滚动整个列表
• Git Diff 面板：未跟踪目录内的文件可正常预览
• 切换工作区后文件树立即展示对应工作区内容
• 工作区快速切换时不会闪现旧工作区文件

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[fennoai]

I found 2 noteworthy issues after the code quality, performance, security, and documentation passes.

1. Medium — web/src/components/panels/FileTreePanel.tsx: openFilePreview still applies readFile results without checking that the active workspace is unchanged. If a user opens the same path in workspace A and workspace B around a switch, the late response from A can still populate the B tab because the tab id is path-based (file:${path}). loadRoot/loadDir now guard against stale workspace responses; this path needs the same protection.

2. Medium — internal/repository/git.go: untracked-directory expansion now recursively walks every untracked subtree inside loadGitSnapshot. That makes summary / changed-files / diff reads proportional to directory size, and even ReadGitDiffFile for one path pays for a full walk first because it calls loadGitSnapshot. On large generated folders this is a noticeable regression; consider a git-based listing or a capped/lazy expansion.

No additional security or documentation-specific findings.

[codecov]

Codecov Report

❌ Patch coverage is 58.58586% with 41 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
internal/cli/web_command.go	38.70%	19 Missing ⚠️
internal/repository/git.go	66.66%	12 Missing and 6 partials ⚠️
internal/repository/git_diff.go	63.63%	2 Missing and 2 partials ⚠️

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