Heeler for herdr

What's new in 0.1.12: - Changes shows an Agent's Checkout's uncommitted changes, grouped into Conflicts, Staged, Changes, and Untracked with file statuses and line counts. Open it from More, the branch or totals above the input, or Worktree details. - File diffs show line numbers and word-level highlights. Wide iPad views offer Side by Side and Unified layouts, remembering your choice and reading position. - Copy paths, lines, or diff hunks, or insert file and line references into Composer or Direct Input without losing your draft or input mode. - The Agents list, switcher, and status line show Checkout line totals, or file counts when no lines changed. The status line also shows the branch and upstream ahead/behind counts. - Changes refreshes after an Agent stops working or a Host reconnects, and supports pull-to-refresh. Open diffs stay in place with a Reload notice when files change; timeouts preserve existing content. - Git reads use the existing SSH connection without modifying the Checkout, running hooks, or writing to the index. - The Dynamic Island pairs Working, Blocked, and Done counts with distinct glyphs, showing the most urgent status first. Expanded, it names that status and marks each Agent with its glyph. - Fixed iPad's search field overlapping short Agents lists and blank areas of Changes file rows not responding to taps. 0.1.12 新变化： - 新增 Changes，查看 Agent 所在 Checkout 的未提交改动，按冲突、已暂存、未暂存和未跟踪分组，显示文件状态与增删行数。可从 More、输入栏上方的分支或统计数字，以及 Worktree 详情进入。 - 文件 diff 支持行号和词级高亮。iPad 宽视图可切换左右对照与 Unified 布局，记住偏好并保留阅读位置。 - 可复制路径、代码行或 diff 片段，也可将文件与行引用插入 Composer 或 Direct Input，保留草稿和输入模式。 - Agents 列表、切换器和状态栏显示 Checkout 增删行数，无行数变化时显示文件数量；状态栏同时显示分支及相对上游领先、落后的提交数。 - Agent 停止工作或 Host 重连后自动刷新，也支持下拉刷新。文件变化时保留已打开的 diff 并提示 Reload；超时保留已有内容。 - 通过现有 SSH 连接读取 Git，不修改 Checkout、不运行 hooks、不写入索引。 - 灵动岛用不同符号标注 Working、Blocked 和 Done 的数量，优先显示最需关注的状态；展开后显示状态名称及各 Agent 的对应符号。 - 修复 iPad 短 Agents 列表被搜索框遮挡，以及 Changes 文件行空白区域点击无响应的问题。