diff --git a/README.md b/README.md index 52353c1..b1e0be5 100644 --- a/README.md +++ b/README.md @@ -151,69 +151,16 @@ dsh registry enable dsh-external/dsh-better-sidebar ## 🖼️ 特性巡礼 -> 以下均为真实界面实拍。 +> 以下均为真实界面实拍（每行两张，点击可放大）。 -### 🗂️ 文件工作台：资源管理器 - -支持两种格式的资源管理器：内嵌在文件预览中 / 独立显示文件树。懒加载目录树、软链接按目标类型展示（目录软链接可展开、失效链接标红）、全局文件名搜索、上传文件/文件夹与拖放上传、右键菜单（在新 Tab 打开 / 在侧边打开 / 复制路径）、悬浮 `@文件` 一键引用进输入框。 - -
文件资源管理器
-
CodeMirror 代码编辑器
- -### 📝 Markdown · 图片 · PDF 内联预览 - -Markdown 预览支持 **Mermaid 图表**（`securityLevel: 'strict'` 安全渲染 + 二次清洗；点击图表弹窗放大、滚轮缩放、拖拽平移）；图片 / PDF 走媒体路由内联展示；Office 三件套由生态插件补齐。 - -
Markdown + Mermaid 预览
-
图片内联预览
- -### 💻 真实终端 - -xterm.js + node-pty 真实 shell（不是模拟器）：断线重连 transcript 回放、shell / shellArgs 可配置（设置页或 `cordis.patch.yml`）、可选为模型注入 `terminal_*` 工具（agent 可直接开终端跑命令）。 - -
真实终端
- -### 🌿 Git 面板 - -暂存 / 取消暂存 / 提交（`Ctrl+Enter`）/ 还原，历史列表；点击改动文件打开 **VSCode 式 diff tab**（红绿行级对比）。 - -
Git 面板
- -### 🌐 内嵌浏览器 - -多开网页 tab：后退 / 前进 / 刷新 / 地址栏；内容运行在**不透明源沙箱 iframe**（界面实时显示沙箱状态，可按页面临时解锁）；聊天里的外链点击可被接管到侧边栏打开（按协议分流，可配）。 - -
内嵌浏览器
- -### 🧩 任务页：子代理拓扑 + 后台任务 - -子代理树实时拓扑（运行状态、批量实时预览）+ 后台任务清单（退出码 / 实时输出 / 强制终止）；新子代理 / 新任务可自动展开侧边栏（可关）。 - -
任务页：子代理拓扑
- -### 💬 侧边对话(beta) - -Codex 风格侧边线程：**每个对话一个独立 Tab**；线程继承主会话完整上下文（含进行中回合，以 interrupted 诚实冻结）独立运行，不污染主会话；可持续追问、重启冷恢复；一键「保存为新会话」提升为顶层会话。 - -
侧边对话(beta)
- -### 🪟 双工作台：右侧栏 + 底部面板 + 分栏 - -右侧栏与底部面板可同时展开；拖 Tab 到分栏边缘**拆分**、拖到中间**合并**（可跨面板）；面板宽高左缘/上缘拖拽调节；移动端自动合并为全宽抽屉。 - -
双工作台（右侧栏 + 底部面板）
- -### ⚙️ 声明式设置 - -设置页「侧边卡片」分区：每个 tab / 预览器一张小卡片，独立开关（高亮启用态 + 品牌开关滑块）；二级设置经卡片底部「功能设置」条弹窗（开关 / 文本 / 数字 / 下拉）；插件自有设置持久化在 `pluginSettings`。 - -
声明式设置：侧边卡片
- -### 📱 移动端 - -窄屏（<768px）自动切换为全宽抽屉：底栏 tab 一次性并入右侧栏，触屏拖拽可调。 - -
移动端全宽抽屉
+| | | +|---|---| +| **🗂️ 文件工作台：资源管理器**
支持两种格式的资源管理器：内嵌在文件预览中 / 独立显示文件树。懒加载目录树、软链接按目标类型展示（目录软链接可展开、失效链接标红）、全局文件名搜索、上传文件/文件夹与拖放上传、右键菜单（在新 Tab 打开 / 在侧边打开 / 复制路径）、悬浮 `@文件` 一键引用进输入框。
文件资源管理器
| **📝 Markdown · 图片 · PDF 内联预览**
Markdown 预览支持 **Mermaid 图表**（`securityLevel: 'strict'` 安全渲染 + 二次清洗；点击图表弹窗放大、滚轮缩放、拖拽平移）；图片 / PDF 走媒体路由内联展示；Office 三件套由生态插件补齐。
Markdown + Mermaid 预览
| +| **🖥️ CodeMirror 代码编辑器**
CodeMirror 代码编辑器
| **🖼️ 图片内联预览**
图片内联预览
| +| **💻 真实终端**
xterm.js + node-pty 真实 shell（不是模拟器）：断线重连 transcript 回放、shell / shellArgs 可配置（设置页或 `cordis.patch.yml`）、可选为模型注入 `terminal_*` 工具（agent 可直接开终端跑命令）。
真实终端
| **🌿 Git 面板**
暂存 / 取消暂存 / 提交（`Ctrl+Enter`）/ 还原，历史列表；点击改动文件打开 **VSCode 式 diff tab**（红绿行级对比）。
Git 面板
| +| **🌐 内嵌浏览器**
多开网页 tab：后退 / 前进 / 刷新 / 地址栏；内容运行在**不透明源沙箱 iframe**（界面实时显示沙箱状态，可按页面临时解锁）；聊天里的外链点击可被接管到侧边栏打开（按协议分流，可配）。
内嵌浏览器
| **🧩 任务页：子代理拓扑 + 后台任务**
子代理树实时拓扑（运行状态、批量实时预览）+ 后台任务清单（退出码 / 实时输出 / 强制终止）；新子代理 / 新任务可自动展开侧边栏（可关）。
任务页：子代理拓扑
| +| **💬 侧边对话(beta)**
Codex 风格侧边线程：**每个对话一个独立 Tab**；线程继承主会话完整上下文（含进行中回合，以 interrupted 诚实冻结）独立运行，不污染主会话；可持续追问、重启冷恢复；一键「保存为新会话」提升为顶层会话。
侧边对话(beta)
| **🪟 双工作台：右侧栏 + 底部面板 + 分栏**
右侧栏与底部面板可同时展开；拖 Tab 到分栏边缘**拆分**、拖到中间**合并**（可跨面板）；面板宽高左缘/上缘拖拽调节；移动端自动合并为全宽抽屉。
双工作台（右侧栏 + 底部面板）
| +| **⚙️ 声明式设置**
设置页「侧边卡片」分区：每个 tab / 预览器一张小卡片，独立开关（高亮启用态 + 品牌开关滑块）；二级设置经卡片底部「功能设置」条弹窗（开关 / 文本 / 数字 / 下拉）；插件自有设置持久化在 `pluginSettings`。
声明式设置：侧边卡片
| **📱 移动端**
窄屏（<768px）自动切换为全宽抽屉：底栏 tab 一次性并入右侧栏，触屏拖拽可调。
移动端全宽抽屉
| ## 🌐 插件生态 @@ -305,6 +252,26 @@ GitHub topic [`dsh-better-sidebar`](https://github.com/topics/dsh-better-sidebar **支持的 DSH 版本**：支持的 DSH 版本：0.1.0-rc.8 · 0.1.1-rc.1 · 0.1.1-rc.2 · 完整发布历史见 [Releases](https://github.com/omdsh-dev/DSH-better-sidebar/releases) +### v0.15.2 + +自 v0.15.1 以来的全部更改： + +**✨ 新功能** + +- 🗂️ **文件树「在应用中打开」子菜单**（[#334](https://github.com/omdsh-dev/DSH-better-sidebar/pull/334)）：文件树右键菜单新增「在应用中打开 >」子菜单——内置打开方式（资源管理器显示/选中、VS Code、Cursor、Zed），每行右侧图钉可固定为右键菜单顶层直达项（再点取消）；配置可选 SSH host 后 VSCode 系条目改用 `vscode-remote/ssh-remote+/` 协议打开，本地专用条目自动隐藏；支持自定义编辑器（名称 + URL 模板 `{path}` + 是否 VSCode 系，配置入口在 Files 卡片齿轮弹窗）。打开动作经新宿主路由 `POST /sidebar/api/open.external`（argv 数组 spawn，无 shell 注入）（[设计文档](docs/plans/2026-08-22-open-with-menu-design.md)） +- 📑 **Tab 右键菜单**（[#331](https://github.com/omdsh-dev/DSH-better-sidebar/pull/331)）：页签右键提供「关闭 / 关闭其他页签 / 关闭左侧页签 / 关闭右侧页签」，作用范围为当前 pane（标签组），无可关对象时置灰；仅打开菜单、不切换激活页签；批量关闭逐条走既有 `onClose` 路径，生命周期完整 +- 📄 **Diff 文件默认折叠**（[#270](https://github.com/omdsh-dev/DSH-better-sidebar/pull/270)）：改动文件头部改为可访问的展开/折叠控件；识别出的源文件默认展开，测试 / 文档 / 生成文件 / lockfile 与未知类型默认折叠；保留现有 500 行上限 +- 📖 **README 更新**：特性巡礼改为表格展示（每行两张图，节省空间）；社区补全微信群 / QQ 群二维码（[#325](https://github.com/omdsh-dev/DSH-better-sidebar/pull/325)，QQ 群 577011007） + +**🐛 修复** + +- 🪟 **空分栏清理**（[#268](https://github.com/omdsh-dev/DSH-better-sidebar/pull/268)）：持久化的 split pane 在临时 diff tab 被清理后遗留全尺寸空分栏——`sanitizeState` 现在同时修剪空的 split leaf，并修复修剪后的失效激活 pane 指针；整个工作台为空时保留唯一空 pane +- 🖥️ **Windows 下隐藏 Git 子进程窗口**（[#301](https://github.com/omdsh-dev/DSH-better-sidebar/pull/301)，关闭 [#124](https://github.com/omdsh-dev/DSH-better-sidebar/issues/124)）：`runGit()` 统一加 `windowsHide: true`，仓库状态轮询与操作不再闪现控制台窗口（其他平台行为不变） +- 📁 **未跟踪文件夹内文件差异**（[#242](https://github.com/omdsh-dev/DSH-better-sidebar/pull/242)）：`git status` 从 `--untracked-files=normal` 切换为 `--untracked-files=all`——新文件夹内每个文件独立成行、可正常加载差异（修正 `fs.read` 报 "is a directory"，与 VSCode 默认行为一致） +- ⚡ **开关/拖拽每帧 React 重渲染消除**（关闭 [#315](https://github.com/omdsh-dev/DSH-better-sidebar/issues/315)）：centerRect 改 ref + 底栏 DOM 直写（零 React 渲染）；TabContent memo（显式比较器）；新增 frame-batcher 对 Divider/dock 拖拽按帧合并；拖拽期跳过无意义 locate。4x CPU 节流 A/B：开关 >17ms 帧 collapse 19→6 / expand 24→4~6，p95 21ms→15ms；拖拽不变（非回归） + +
+历史版本（v0.12.0 – v0.15.1） ### v0.15.1 自 v0.15.0 以来的全部更改： @@ -320,8 +287,6 @@ GitHub topic [`dsh-better-sidebar`](https://github.com/topics/dsh-better-sidebar - 📂 **文件树上传遮罩不再拦截 Tab 拖拽**（[#317](https://github.com/omdsh-dev/DSH-better-sidebar/pull/317)）：拖拽 Tab（重排 / 跨 pane split）经过资源管理器时不再弹上传遮罩、不吞事件——统一按 `dataTransfer.types` 含 `Files` 门控（与面板宿主 shield 一致），Tab 正常落下；OS 文件拖拽行为不变 - 💬 **子代理自动展开去抖**（[#314](https://github.com/omdsh-dev/DSH-better-sidebar/pull/314)）：Side Chat 线程创建不再误弹任务页——0→N 触发 500ms 重臂并对实时快照按原基线重评估，标题过滤器识别线程后才放行；真实子代理依然自动展开 -
-历史版本（v0.12.0 – v0.14.0） ### v0.15.0 自 v0.14.0 以来的全部更改： diff --git a/README_EN.md b/README_EN.md index 4412e2b..cbbd363 100644 --- a/README_EN.md +++ b/README_EN.md @@ -151,69 +151,16 @@ Update: `git pull && pnpm install && pnpm build` → `node scripts/package-regis ## 🖼️ Feature Tour -> Below are real UI screenshots. +> Below are real UI screenshots (two per row; click to zoom). -### 🗂️ File Workbench: Explorer - -Two explorer modes: embedded in the file preview / standalone file tree. Lazy-loading directory tree, symlinks classified by target kind (directory links expand, dangling links flagged), global filename search, file/folder upload buttons plus drag-drop upload, context menu (open in new tab / open to the side / copy paths), and a hover `@file` button that references a file straight into the composer. - -
File explorer
-
CodeMirror editor
- -### 📝 Inline Preview: Markdown · Images · PDF - -The Markdown preview renders **Mermaid diagrams** (strict-mode safe rendering + a second sanitize pass; click a diagram for a zoom modal with wheel-zoom and drag-pan); images / PDFs display inline via the media route; the Office suite is covered by an ecosystem plugin. - -
Markdown + Mermaid preview
-
Inline image preview
- -### 💻 Real Terminal - -xterm.js + node-pty real shell (not an emulator): transcript replay on reconnect, configurable shell / shellArgs (settings page or `cordis.patch.yml`), and optional `terminal_*` model tools so the agent can open terminals and run commands itself. - -
Real terminal
- -### 🌿 Git Panel - -Stage / unstage / commit (`Ctrl+Enter`) / revert, plus a history list; clicking a changed file opens a **VSCode-style diff tab** (line-level red/green). - -
Git panel
- -### 🌐 Embedded Browser - -Multiple web tabs with back / forward / reload / address bar; content runs in an **opaque-origin sandboxed iframe** (live sandbox status in the UI, per-page temporary unlock available); external-link clicks in the chat can be taken over into the sidebar (protocol-based routing, configurable). - -
Embedded browser
- -### 🧩 Tasks: Agent Topology + Background Jobs - -Live subagent-tree topology (run states, batched live previews) plus the background-jobs list (exit codes / live output / force-kill); new subagents / jobs can auto-expand the sidebar (configurable). - -
Tasks: subagent topology
- -### 💬 Side Chat (beta) - -Codex-style side threads: **one independent tab per conversation**; the thread inherits the parent's full context (including the in-progress turn, honestly frozen as "interrupted") and runs independently without polluting the main session; follow-ups survive restarts; one click promotes the thread to a top-level session. - -
Side Chat (beta)
- -### 🪟 Dual Workbench: Sidebar + Bottom Panel + Split Panes - -The right sidebar and the bottom panel can stay open together; drag a tab to a pane edge to **split**, to the middle to **merge** (works across panels); panel width/height drag from the left/top edge; on mobile everything merges into a full-width drawer. - -
Dual workbench (right sidebar + bottom panel)
- -### ⚙️ Declarative Settings - -The "Side card" section in DSH settings: one small card per tab / viewer with an independent toggle (highlighted enabled state + brand switch); secondary settings open from the "Feature settings" strip at the card bottom (switch / text / number / select rows); plugin-owned settings persist under `pluginSettings`. - -
Declarative settings: side cards
- -### 📱 Mobile - -On narrow screens (<768px) the panels become a full-width drawer: bottom-panel tabs merge into the sidebar once, with touch-friendly dragging. - -
Mobile full-width drawer
+| | | +|---|---| +| **🗂️ File Workbench: Explorer**
Two explorer modes: embedded in the file preview / standalone file tree. Lazy-loading directory tree, symlinks classified by target kind (directory links expand, dangling links flagged), global filename search, file/folder upload buttons plus drag-drop upload, context menu (open in new tab / open to the side / copy paths), and a hover `@file` button that references a file straight into the composer.
File explorer
| **📝 Inline Preview: Markdown · Images · PDF**
The Markdown preview renders **Mermaid diagrams** (strict-mode safe rendering + a second sanitize pass; click a diagram for a zoom modal with wheel-zoom and drag-pan); images / PDFs display inline via the media route; the Office suite is covered by an ecosystem plugin.
Markdown + Mermaid preview
| +| **🖥️ CodeMirror editor**
CodeMirror editor
| **🖼️ Inline image preview**
Inline image preview
| +| **💻 Real Terminal**
xterm.js + node-pty real shell (not an emulator): transcript replay on reconnect, configurable shell / shellArgs (settings page or `cordis.patch.yml`), and optional `terminal_*` model tools so the agent can open terminals and run commands itself.
Real terminal
| **🌿 Git Panel**
Stage / unstage / commit (`Ctrl+Enter`) / revert, plus a history list; clicking a changed file opens a **VSCode-style diff tab** (line-level red/green).
Git panel
| +| **🌐 Embedded Browser**
Multiple web tabs with back / forward / reload / address bar; content runs in an **opaque-origin sandboxed iframe** (live sandbox status in the UI, per-page temporary unlock available); external-link clicks in the chat can be taken over into the sidebar (protocol-based routing, configurable).
Embedded browser
| **🧩 Tasks: Agent Topology + Background Jobs**
Live subagent-tree topology (run states, batched live previews) plus the background-jobs list (exit codes / live output / force-kill); new subagents / jobs can auto-expand the sidebar (configurable).
Tasks: subagent topology
| +| **💬 Side Chat (beta)**
Codex-style side threads: **one independent tab per conversation**; the thread inherits the parent's full context (including the in-progress turn, honestly frozen as "interrupted") and runs independently without polluting the main session; follow-ups survive restarts; one click promotes the thread to a top-level session.
Side Chat (beta)
| **🪟 Dual Workbench: Sidebar + Bottom Panel + Split Panes**
The right sidebar and the bottom panel can stay open together; drag a tab to a pane edge to **split**, to the middle to **merge** (works across panels); panel width/height drag from the left/top edge; on mobile everything merges into a full-width drawer.
Dual workbench (right sidebar + bottom panel)
| +| **⚙️ Declarative Settings**
The "Side card" section in DSH settings: one small card per tab / viewer with an independent toggle (highlighted enabled state + brand switch); secondary settings open from the "Feature settings" strip at the card bottom (switch / text / number / select rows); plugin-owned settings persist under `pluginSettings`.
Declarative settings: side cards
| **📱 Mobile**
On narrow screens (<768px) the panels become a full-width drawer: bottom-panel tabs merge into the sidebar once, with touch-friendly dragging.
Mobile full-width drawer
| ## 🌐 Plugin Ecosystem @@ -310,6 +257,27 @@ The GitHub topic [`dsh-better-sidebar`](https://github.com/topics/dsh-better-sid **Supported DSH versions**: Supported DSH versions: 0.1.0-rc.8 · 0.1.1-rc.1 · 0.1.1-rc.2 · full release history on the [Releases](https://github.com/omdsh-dev/DSH-better-sidebar/releases) page +### v0.15.2 + +All changes since v0.15.1: + +**✨ New features** + +- 🗂️ **"Open in app" submenu in the file tree** ([#334](https://github.com/omdsh-dev/DSH-better-sidebar/pull/334)): the file-tree context menu gains an "Open in app >" submenu — built-in openers (reveal/select in file manager, VS Code, Cursor, Zed), each with a pin button that promotes it to a top-level context-menu item (click again to unpin); with an optional SSH host configured, VSCode-family entries switch to the `vscode-remote/ssh-remote+/` protocol and local-only entries hide automatically; custom editors supported (name + URL template with `{path}` + "VSCode-family" flag, configured in the Files card gear popup). Open actions go through the new host route `POST /sidebar/api/open.external` (argv-array spawn, no shell injection) ([design](docs/plans/2026-08-22-open-with-menu-design.md)) +- 📑 **Tab context menu** ([#331](https://github.com/omdsh-dev/DSH-better-sidebar/pull/331)): right-clicking a tab offers **Close / Close others / Close to the left / Close to the right**, scoped to the current pane (tab group); items grey out when there is nothing to close; the menu only opens — it never switches the active tab; bulk closes go through the existing per-tab `onClose` path so lifecycle callbacks, pty release and agent-terminal shutdown all stay intact +- 📄 **Diff files collapsed by default** ([#270](https://github.com/omdsh-dev/DSH-better-sidebar/pull/270)): each changed-file header is now an accessible expand/collapse control; recognized source files expand by default while tests, docs, generated files, lockfiles and unknown types stay collapsed; the existing 500-row cap for expanded content is preserved +- 📖 **README update**: feature tour converted to a table (two screenshots per row, saves space); community section now shows the WeChat group and QQ group QR codes ([#325](https://github.com/omdsh-dev/DSH-better-sidebar/pull/325), QQ group 577011007) + +**🐛 Fixes** + +- 🪟 **Prune empty restored panes** ([#268](https://github.com/omdsh-dev/DSH-better-sidebar/pull/268)): persisted split panes left empty when ephemeral diff tabs were dropped no longer survive as full-size blanks — `sanitizeState` now also prunes the empty split leaf and repairs the stale active-pane pointer; a fully empty workbench keeps its single empty pane +- 🖥️ **Hide spawned git windows on Windows** ([#301](https://github.com/omdsh-dev/DSH-better-sidebar/pull/301), fixes [#124](https://github.com/omdsh-dev/DSH-better-sidebar/issues/124)): the shared `runGit()` spawn options now set `windowsHide: true`, so repo-status polling and git actions no longer flash console windows on Windows (no behavior change on other platforms) +- 📁 **Untracked files inside new folders** ([#242](https://github.com/omdsh-dev/DSH-better-sidebar/pull/242)): `git status` switched from `--untracked-files=normal` to `--untracked-files=all` — each file inside a new folder now shows as its own row and its diff can be loaded (no more `fs.read` "is a directory" error), matching VSCode's default behavior +- ⚡ **Per-frame React re-renders eliminated for toggles/drags** (closes [#315](https://github.com/omdsh-dev/DSH-better-sidebar/issues/315)): `centerRect` moved to a ref with direct DOM writes to the bottom bar (zero React renders); `TabContent` memoized with an explicit comparator; a new frame-batcher coalesces Divider/dock drags per frame; meaningless locate passes skipped during drags. 4x CPU-throttled A/B: >17ms frames on toggle collapse 19→6 / expand 24→4~6, p95 21ms→15ms; drags unchanged (non-regression) + +
+Older releases (v0.12.0 – v0.15.1) + ### v0.15.1 All changes since v0.15.0: @@ -345,9 +313,6 @@ All changes since v0.14.0: - 🔧 **Adapted to DSH 0.1.1-rc.1 / rc.2 (@next)** ([#297](https://github.com/omdsh-dev/DSH-better-sidebar/pull/297) [#305](https://github.com/omdsh-dev/DSH-better-sidebar/pull/305)): no code changes needed - 🔒 **Upload-chain hardening** ([#239](https://github.com/omdsh-dev/DSH-better-sidebar/pull/239)): empty and absolute `relativePath` segments are refused outright; uniquely named temp files (concurrent uploads stay independent, crashed processes never block later uploads); write-stream error listeners (a failing disk can no longer crash the host); client error codes unified with the wire (`too-large`), 413s localized -
-Older releases (v0.12.0 – v0.14.0) - ### v0.14.0 > ⚠️ This release requires DSH ≥ 0.1.0-rc.8. All changes since v0.13.1: diff --git a/dsh.plugin.json b/dsh.plugin.json index f067d21..a230943 100644 --- a/dsh.plugin.json +++ b/dsh.plugin.json @@ -1,6 +1,6 @@ { "id": "dsh-external/dsh-better-sidebar", - "version": "0.15.1", + "version": "0.15.2", "main": "./lib/index.js", "description": "VSCode 风格右侧侧边栏：文件资源管理器 / 编辑器 / 终端 / Git / 浏览器，按会话隔离。暴露服务供其他插件注册侧边栏页面和文件预览器", "engines": { diff --git a/package.json b/package.json index 8dce638..a923848 100644 --- a/package.json +++ b/package.json @@ -1,6 +1,6 @@ { "name": "dsh-better-sidebar", - "version": "0.15.1", + "version": "0.15.2", "description": "DSH web plugin: a VSCode-like right sidebar (explorer / editor / terminal / git / browser), isolated per conversation session. Exposes a service for other plugins to register sidebar tabs and file viewers.", "type": "module", "repository": { diff --git a/src/client/service.ts b/src/client/service.ts index c16e67d..af9ac1d 100644 --- a/src/client/service.ts +++ b/src/client/service.ts @@ -470,7 +470,7 @@ export function matchUrlTarget(tabs: readonly TabDescriptor[], url: URL): TabDes * The plugin version this service instance reports. Keep in lockstep with * `package.json`'s version — `tests/service.spec.ts` asserts the pair. */ -export const SIDEBAR_SERVICE_VERSION = '0.15.1' +export const SIDEBAR_SERVICE_VERSION = '0.15.2' /** * Monotonic capability list consumers use to gate new API usage (features