refactor: 移除 WebView2，界面只保留 Direct2D (#1013)

* refactor(engine): 语音独立工具改用原生托盘菜单，移除 WebView2 托盘菜单改用 Win32 弹出菜单，设置项改为用关联编辑器打开 config.toml，关于页改为消息框。删除 window_webview2 与两份 HTML 资源，windows-app 特性不再依赖 webview2 端口。 * refactor(server): 移除 WebView2，候选窗、工具栏、托盘菜单与设置窗口只保留 Direct2D 删除 src/webview2 与 webview_utils，小窗口的置顶、皮肤重载和工具栏状态缓存移到 window/small_windows，presenter 成为唯一路径，D2D 下的置顶时序与 cloak 行为保持不变。设置进程去掉 WebView2 宿主、鼠标转发与启动图，只构建原生窗口；旧快捷方式传入的 --d2d / --webview2 被忽略。删除 appearance.ui_backend 与 appearance.settings_ui_backend（读取、写入、设置页下拉框与两份配置模板），升级时由模板合并丢弃旧值。设置窗口的图片资源移到 server/assets/settings，安装到数据目录的 assets\settings。不再链接 WebView2Loader，vcpkg 去掉 webview2 端口。 * build(installer): 打包与 CI 不再处理 WebView2 页面和运行时 Prepare-PackageFiles 去掉 -UiHtmlDirectory 与 html 暂存，改为暂存 server/assets/settings；安装器不再检查 WebView2 Runtime、不再创建 ProgramData 下的 WebView2 用户数据目录，升级和卸载时清理旧版留下的 webview2 / webview2-settings 与数据目录里的 html。CI 删除设置页构建、契约同步检查和候选窗 DOM 测试，release 的打包任务不再依赖网页产物；dependabot 去掉 npm。第三方声明去掉 WebView2Loader。 * refactor(ui-html): 删除 WebView2 页面与设置页前端工程候选窗、工具栏、托盘菜单、设置页、主题和契约副本都已没有使用者；设置窗口用到的图片资源已移到 server/assets/settings。sync-contracts.py 与 pnpm/Vite/TypeScript 工程一并删除，契约仍以 engine/contracts/webview 为唯一来源。 * docs(server): 文档改为只描述 Direct2D 界面仓库地图去掉 ui-html，组件边界、uiAccess 与置顶时序、设置窗口和配置读写的说明改写为 Direct2D 唯一界面；安装说明去掉 WebView2 Runtime 检查，打包命令去掉 -UiHtmlDirectory；engine/contracts/webview 的说明改为设置窗口是唯一使用者，名字是历史遗留。 * docs(skins): 皮肤说明不再区分 WebView2 与 D2D 渲染器 v2 字段去掉「仅 WebView2」，改为说明由 Direct2D 原生渲染、部分字段仍在补全；颜色必须带 # 改为清单格式约定。随包的 skins/niya-demo/skin.toml 不改，免得用户机器上的同名皮肤在升级时被当成已修改而改名备份。 * docs(ui): demo 说明文字不再提 WebView2
2026-10-17 02:48:02 +08:00
1 parent d270395816
commit 1b875267db
@@ -23,17 +23,3 @@ updates:
    commit-message:
      prefix: "chore(deps)"
    open-pull-requests-limit: 5
-
-  # The settings page is the one part of this repository that is built rather than shipped as
-  # source, and it sits on the release path, so its dependencies need watching.
-  - package-ecosystem: "npm"
-    directory: "/ui-html/webview2/settings/ime-settings"
-    schedule:
-      interval: "monthly"
-    groups:
-      npm:
-        patterns:
-          - "*"
-    commit-message:
-      prefix: "chore(deps)"
-    open-pull-requests-limit: 5
@@ -107,8 +107,8 @@ jobs:
  # races and null dereferences that the Debug build did not catch. Linux acted on that; this
  # repository had no sanitizer coverage at all.
  #
-  # Sanitizing the whole server would mean a sanitized Boost, curl, sqlite and WebView2 on a Windows
-  # runner. Instead the host-independent parsing and policy code builds as its own tiny target with
+  # Sanitizing the whole server would mean a sanitized Boost, curl and sqlite on a Windows runner.
+  # Instead the host-independent parsing and policy code builds as its own tiny target with
  # no dependencies, which runs under ASan and UBSan on Linux in seconds. It covers less than a full
  # sanitized build would; it covers it on every pull request.
  sanitizers:
@@ -295,59 +295,6 @@ jobs:
        shell: pwsh
        run: ctest --no-tests=error --test-dir ui/build -C Release --verbose --timeout 60

-  pages:
-    name: Settings page
-    runs-on: ubuntu-24.04
-    timeout-minutes: 20
-    steps:
-      - name: Check out source
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          persist-credentials: false
-
-      # The pages ship a copy of the engine's web contract. Before the consolidation the product
-      # lock kept that copy honest by pinning UiHtml and the engine together; now that the engine is
-      # a directory of this repository, the copy is checked against engine/contracts/webview
-      # directly and a plain checkout is enough to do it.
-      - name: Check the bundled contract against the engine
-        run: python3 ui-html/scripts/sync-contracts.py --check
-
-      - name: Set up pnpm
-        uses: pnpm/action-setup@ea17c68df8912ef543352723c149a84f56e3d413 # v6.1.0
-        with:
-          version: 10
-
-      - name: Set up Node
-        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
-        with:
-          node-version: 22
-          cache: pnpm
-          cache-dependency-path: ui-html/webview2/settings/ime-settings/pnpm-lock.yaml
-
-      - name: Install
-        working-directory: ui-html/webview2/settings/ime-settings
-        run: pnpm install --frozen-lockfile
-
-      - name: Test
-        working-directory: ui-html/webview2/settings/ime-settings
-        run: pnpm test
-
-      - name: Test candidate DOM rendering
-        run: node --test server/tests/test-candidate-dom-render.cjs
-
-      # Same command the release workflow runs. Until it was added here it was only ever exercised
-      # during a release, so a break surfaced while cutting a version.
-      - name: Build
-        working-directory: ui-html/webview2/settings/ime-settings
-        run: pnpm build
-
-      - name: Check the output the installer collects
-        working-directory: ui-html/webview2/settings/ime-settings
-        run: |
-          test -f dist/index.html
-          echo "dist contents:"
-          ls -la dist
-
  # External skins are plain data, so the checks are the manifest contract the Server catalog
  # enforces plus the example's installer; both run against the example and the skins/ collection.
  skins:
@@ -452,58 +452,12 @@ jobs:
          path: server/build-release/bin/Release
          if-no-files-found: error

-  ui:
-    name: Build settings page
-    needs: [prepare, dependencies]
-    if: ${{ needs.prepare.outputs.should_publish == 'true' }}
-    runs-on: ubuntu-24.04
-    timeout-minutes: 30
-    steps:
-      - name: Check out release commit
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          ref: ${{ needs.prepare.outputs.target_sha }}
-          persist-credentials: false
-
-      - name: Verify the shipped pages carry the engine's contract
-        run: python3 ui-html/scripts/sync-contracts.py --check
-
-      - name: Set up pnpm
-        uses: pnpm/action-setup@ea17c68df8912ef543352723c149a84f56e3d413 # v6.1.0
-        with:
-          version: 10
-
-      - name: Set up Node
-        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
-        with:
-          node-version: 22
-          cache: pnpm
-          cache-dependency-path: ui-html/webview2/settings/ime-settings/pnpm-lock.yaml
-
-      - name: Install and build the settings page
-        working-directory: ui-html/webview2/settings/ime-settings
-        run: |
-          pnpm install --frozen-lockfile
-          pnpm build
-
-      - name: Upload the web assets
-        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
-        with:
-          name: webview2
-          path: |
-            ui-html/webview2/candwnd
-            ui-html/webview2/ftb
-            ui-html/webview2/menu
-            ui-html/webview2/shared
-            ui-html/webview2/settings/ime-settings/dist
-          if-no-files-found: error
-
  package:
    name: Package and publish installer
-    needs: [prepare, dependencies, tsf, server, ui]
+    needs: [prepare, dependencies, tsf, server]
    # Stated explicitly even though skipped needs would already skip this job. This is the only job
    # that spends a signature, so the condition that stops it belongs here rather than being a
-    # consequence of four other jobs' conditions that a later edit could quietly undo.
+    # consequence of the other jobs' conditions that a later edit could quietly undo.
    if: ${{ needs.prepare.outputs.should_publish == 'true' }}
    runs-on: ${{ needs.prepare.outputs.signing_provider == 'signpath' && 'windows-2025' || fromJSON('["self-hosted","Windows","X64","msime-windows"]') }}
    # A SignPath signing request waits for an approver, twice per release, so that path gets room for both approvals on top of the build.
@@ -602,12 +556,6 @@ jobs:
          name: server
          path: server/build-release/bin/Release

-      - name: Download the web assets
-        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
-        with:
-          name: webview2
-          path: ui-html/webview2
-
      - name: Download the dictionaries
        shell: bash
        env:
@@ -656,7 +604,7 @@ jobs:
        run: >
          pwsh -File ./Prepare-PackageFiles.ps1 -TargetVersion $env:TARGET_VERSION
          -RepoRoot (Resolve-Path '..').Path
-          -TsfDirectory windows -ServerDirectory server -UiHtmlDirectory ui-html -NoticesDirectory .
+          -TsfDirectory windows -ServerDirectory server -NoticesDirectory .
          -HelpCodeDirectory engine/helpcode -IncludeSymbols

      - name: Embed the exact product dependency manifest
@@ -11,10 +11,9 @@ Windows 端的全部一方源码在本仓。**合仓改变的是仓库数量，
 | 目录 | 职责 | 本目录的规则 |
 |---|---|---|
 | `windows/` | TSF 文本服务 DLL：按键预判、焦点、edit session、管道客户端 | [windows/AGENTS.md](windows/AGENTS.md) |
-| `server/` | 常驻后端：候选状态、配置、词库、管道服务、窗口与 WebView2 宿主 | [server/AGENTS.md](server/AGENTS.md) |
+| `server/` | 常驻后端：候选状态、配置、词库、管道服务，以及候选窗、悬浮工具栏、托盘菜单和设置窗口（均由 `msimeui` 以 Direct2D 绘制） | [server/AGENTS.md](server/AGENTS.md) |
 | `engine/` | 输入引擎：输入会话、候选查询、辅助码、跨进程契约、语音模块 | [engine/AGENTS.md](engine/AGENTS.md) |
 | `ui/` | 通用 Win32 / Direct2D / DirectWrite 控件库 `msimeui` | [ui/AGENTS.md](ui/AGENTS.md) |
-| `ui-html/` | 候选窗、工具栏、菜单、设置页的 HTML / CSS / JS | [ui-html/README.md](ui-html/README.md) |
 | `installer/` | 收集产物、自签名、Inno Setup 打包 | [installer/README.md](installer/README.md) |
 | `log/` | 日志采集库 | — |
 | `skins/` | 外部皮肤合集，每个子目录一个 `skin.toml` 皮肤包；除素材授权未核实的外随安装包装到数据目录，同名且改过的旧版改名 `.bak` 保留 | [skins/README.md](skins/README.md) |
@@ -27,11 +26,10 @@ Windows 端的全部一方源码在本仓。**合仓改变的是仓库数量，

 ## 组件之间的边界

- **协议的唯一来源是 `engine/contracts/`**。IPC 线格式、opcode、语音分帧和 WebView 消息定义都在那里，`windows/` 和 `server/` 各自引用同一份头文件。不要在任何一侧重新定义或复制一份。
+- **协议的唯一来源是 `engine/contracts/`**。IPC 线格式、opcode、语音分帧和设置窗口的消息定义（`engine/contracts/webview/`，名字是历史遗留）都在那里，`windows/` 和 `server/` 各自引用同一份头文件。不要在任何一侧重新定义或复制一份。
 - **`ui/` 不许反向依赖产品**。它不读 Server 配置、IPC、引擎、词库或全局输入状态；业务通过数据和回调接入。`ui/scripts/check-boundary.py` 在 CI 里检查已知的反向依赖，新增依赖会红。
- **窗口归 `server/`，页面归 `ui-html/`**。HWND、尺寸、位置、DPI、Z-order 和 WebView2 controller 的生命周期在 `server/src/window/` 与 `server/src/webview2/`；页面结构、样式和浏览器端交互在 `ui-html/webview2/`。改消息 `type`、JSON 字段或页面导出的 JS 函数时两侧要一起改。
- **候选与输入状态的权威在 Server 和引擎**，页面只负责展示和发出用户动作，不要在网页侧复制状态机。
- `ui-html/webview2/shared/` 是引擎 web 契约的副本，由 `ui-html/scripts/sync-contracts.py` 生成，CI 用 `--check` 验证它和 `engine/contracts/webview/` 一致。手改这个目录会被 CI 拦下来，改契约要改 `engine/contracts/`，然后在同一个提交里重新生成。
+- **界面只有 Direct2D 一套**。候选窗、悬浮工具栏、托盘菜单的 HWND、尺寸、位置、DPI、Z-order 和绘制在 `server/src/window/`（presenter 用 `ui/` 的 `msimeui` 控件）；设置窗口是独立进程 `server/src/settings/`，界面在 `server/src/settings/native/`，用到的图片资源在 `server/assets/settings/`，安装到数据目录的 `assets\settings\`。WebView2 与 `ui-html/` 已移除，不要再引入浏览器内核或网页前端。
+- **候选与输入状态的权威在 Server 和引擎**，界面只负责展示和发出用户动作，不要在 presenter 或设置窗口里复制状态机。
 - **新增配置项必须同时写进出厂模板 `installer/default_config/config.default.toml`。** 这个文件是安装包真正打进去的那一份，Server 升级时用 `MergeConfigIntoTemplate` 以它为骨架重建用户配置：**模板里没有的键会被丢弃**。只在 `ime_config.cpp` 里加读取和默认值，代码本身能跑，但用户在设置页改过的值会在下次升级时静默消失，而且没有任何编译期或运行期报错。同一个提交里要一并更新的还有 `server/assets/config/config.toml`（开发和 CI 测试用的工作配置），以及设置页的配置读写映射——服务端进程内已不再内嵌设置宿主，读写映射只剩独立设置进程 `server/src/settings/settings_app.cpp` 一处，其中 `BuildConfigMessage` 里 `configSnapshot` 的字段列表和 `ApplyConfigUpdate` 里 `path == "..."` 的分发两边都要加，漏掉任一边的表现是「设置页能点，重开就回退」。
 - **`engine/` 是本仓的一等代码，不是 vendored 第三方。** 需要为 Windows 改引擎就直接改，和改 `server/` 一样评审和测试，不用绕上游。唯一例外是 `engine/` 下的 `ngram/kenlm/`、`ngram/octagram/darts.h`、`utfcpp/` 和 `voice/third_party/`，那几个是上游副本，保留原格式与许可；`darts.h` 按精确路径单独排除，同目录的 `octagram_gram.{h,cpp}` 是我们的代码，仍受格式门禁管。`googlepinyinime-rev/` 已与上游解绑，可以直接改，但保留它原有的格式与许可，本地改动记在 UPSTREAM.md。来源与裁剪清单见 [engine/UPSTREAM.md](engine/UPSTREAM.md)。

@@ -59,7 +57,7 @@ cmake -S ui      -B ui/build -A x64                # GUI 框架

 **格式化会卡 CI，提交前务必自查，注意两个坑：**

- **版本必须是 clang-format `18.1.8`**。`format.sh` 把版本钉死在这个值并从 PyPI 装，不同版本的默认排版不一致，用系统自带的 clang-format 本地过了、CI 仍可能红。`quality.yml` 的 `Check formatting` 步骤只跑 C++（`server`/`windows`/`ui`/`log`/`engine`），**不覆盖 `ui-html/` 的 TS/CSS**——那边只有 `pnpm build`（`tsc`）和 `pnpm test` 把关，没有 prettier/eslint 格式门禁。
+- **版本必须是 clang-format `18.1.8`**。`format.sh` 把版本钉死在这个值并从 PyPI 装，不同版本的默认排版不一致，用系统自带的 clang-format 本地过了、CI 仍可能红。`quality.yml` 的 `Check formatting` 步骤只跑 C++（`server`/`windows`/`ui`/`log`/`engine`）。
 - **`format.sh` 在 Windows 上跑不起来**：它假设 venv 是 Unix 布局（`bin/pip`、`bin/clang-format`），而 Windows 的 `python -m venv` 生成的是 `Scripts/`，脚本会以 `No such file or directory` 退出。在 Windows 上改了 C++ 就直接调 18.1.8 的 clang-format 自查，绕过这个脚本：

  ```powershell
@@ -74,7 +72,7 @@ cmake -S ui      -B ui/build -A x64                # GUI 框架

 ## 产品输入清单

-`product-lock.json` 只记录仍来自仓外的东西，现在只剩一项：词库 Release 的 tag、source commit 和每个产物的 SHA256。**引擎、Server、页面、GUI 框架和安装器都不在清单里**——它们是本仓的目录，本仓的一个 commit 就已经把它们钉住了。辅助码在 `engine/helpcode/`，同理。
+`product-lock.json` 只记录仍来自仓外的东西，现在只剩一项：词库 Release 的 tag、source commit 和每个产物的 SHA256。**引擎、Server、GUI 框架和安装器都不在清单里**——它们是本仓的目录，本仓的一个 commit 就已经把它们钉住了。辅助码在 `engine/helpcode/`，同理。

 - 引擎没有 `repositories` 条目，这是有意的。它不再有 gitlink，锁里写一个上游 commit 就等于声称这棵树仍等于上游——第一个 Windows 专门化的改动落地时这句话就假了，而且没有任何 CI 能发现。来源改记在 [engine/UPSTREAM.md](engine/UPSTREAM.md)。
 - `refresh` 不解析任何浮动源码引用，词库取自指定 tag。词库清单里记录了构建它的 commit 和当时工作树是否干净，`verify-assets` 一并校验——摘要只能证明字节是评审过的字节，证明不了它来自一个能重建的源。
@@ -139,7 +137,7 @@ release workflow 里的每一段 shell 都抽在 `scripts/ci/` 下，workflow
 | `revalidate-draft-release.sh` | 发布前复查 draft 仍指向被构建的那个 commit |
 | `publish-release.sh` | 上传产物、追加说明、发布 |

-合仓之前 CI 要把五个仓 checkout 到历史目录名下，`Prepare-PackageFiles.ps1` 才能不改一行地跑。现在源目录名由 workflow 显式传参（`-TsfDirectory windows -ServerDirectory server -UiHtmlDirectory ui-html -NoticesDirectory . -HelpCodeDirectory engine/helpcode`），只有词库还落在仓根的 `MetasequoiaImeDict/`，用的是那个参数的默认值。改动这些脚本里的产物路径时，要连同 release workflow 一起核对。
+合仓之前 CI 要把五个仓 checkout 到历史目录名下，`Prepare-PackageFiles.ps1` 才能不改一行地跑。现在源目录名由 workflow 显式传参（`-TsfDirectory windows -ServerDirectory server -NoticesDirectory . -HelpCodeDirectory engine/helpcode`），只有词库还落在仓根的 `MetasequoiaImeDict/`，用的是那个参数的默认值。改动这些脚本里的产物路径时，要连同 release workflow 一起核对。

 词库不在 CI 里现建，从产品锁指定仓库的 `dict-*` release 下载并校验 SHA256。**建库流水线不在本仓**——它随引擎的专门化一并裁掉了（见 [engine/UPSTREAM.md](engine/UPSTREAM.md)），现有 MSIME-Dict release 作为不可变旧产物保留；换发布源要在 `product_lock.py` 里明确评审，不是改个 tag 就能悄悄完成的事。词库改了要先在上游把新词库发布出来，再发 Windows 版本；通过 `scripts/product_lock.py refresh --dictionary-tag <tag>` 更新产品锁并评审摘要变更；发布构建不能临时覆盖词库版本。

@@ -149,4 +147,4 @@ release workflow 里的每一段 shell 都抽在 `scripts/ci/` 下，workflow

 ## 提交

-提交信息用 `type(scope): 摘要`，scope 用目录名（`windows`、`server`、`engine`、`ui`、`ui-html`、`installer`）。不要添加 `Co-Authored-By`、`Generated with` 或其他 AI 生成标记。
+提交信息用 `type(scope): 摘要`，scope 用目录名（`windows`、`server`、`engine`、`ui`、`installer`）。不要添加 `Co-Authored-By`、`Generated with` 或其他 AI 生成标记。
@@ -70,7 +70,7 @@ Set-Location ..\server
 .\scripts\lcompile-release.ps1

 Set-Location ..\installer
-.\Prepare-PackageFiles.ps1 -RepoRoot .. -TsfDirectory windows -ServerDirectory server -UiHtmlDirectory ui-html -NoticesDirectory .
+.\Prepare-PackageFiles.ps1 -RepoRoot .. -TsfDirectory windows -ServerDirectory server -NoticesDirectory .
 .\Sign-PackageBinaries-Local.ps1
 .\Compile-Installer.ps1
 ```
@@ -79,12 +79,11 @@ Set-Location ..\installer

 ## 改动前要知道的几条边界

- **协议的唯一来源是 `engine/contracts/`。** IPC 线格式、opcode、语音分帧和 WebView 消息定义都在那里，两侧引用同一份头文件，不要在任何一侧另写一份。
+- **协议的唯一来源是 `engine/contracts/`。** IPC 线格式、opcode、语音分帧和设置窗口的消息定义都在那里，两侧引用同一份头文件，不要在任何一侧另写一份。
 - **`engine/` 是本仓的一等代码。** 要为 Windows 改引擎就直接改，和改 `server/` 一样评审和测试；引擎和调用它的代码可以、也应该在同一个 PR 里。例外是 `engine/` 下的 `googlepinyinime-rev/`、`ngram/kenlm/`、`utfcpp/`、`voice/third_party/`，那是上游副本。见 [engine/UPSTREAM.md](engine/UPSTREAM.md)。
 - **`ui/` 不许反向依赖产品。** 它不读 Server 配置、IPC、引擎、词库或全局输入状态。`ui/scripts/check-boundary.py` 在 CI 里检查。
- **窗口归 `server/`，页面归 `ui-html/`。** 改消息 `type`、JSON 字段或页面导出的 JS 函数时两侧一起改。
- **`ui-html/webview2/shared/` 是生成物**，由 `ui-html/scripts/sync-contracts.py` 从 `engine/contracts/webview/` 同步，CI 用 `--check` 校验。要改契约就去改 `engine/contracts/`，然后在同一个提交里重新生成。
- **候选与输入状态的权威在 Server 和引擎**，页面只负责展示。
+- **界面只有 Direct2D 一套，全部在 `server/`。** 候选窗、工具栏、托盘菜单在 `server/src/window/`，设置窗口在 `server/src/settings/native/`，都用 `ui/` 的 `msimeui` 绘制。改设置窗口的消息 `type` 或 JSON 字段时，`engine/contracts/webview/` 与 `settings_app.cpp` 一起改。
+- **候选与输入状态的权威在 Server 和引擎**，界面只负责展示。

 ## 提交前

@@ -18,7 +18,7 @@ Every claim below is checkable against this repository. Where a default matters,

 ## No telemetry

-There is no analytics, telemetry, crash reporting, or usage measurement that leaves this machine. The input method does not record, store or transmit what you type: the only records it can keep are the optional local counters described below, and those cover character classes, activity time and candidate-choice counts, never text. No third-party SDK for those purposes is linked, and there is no endpoint that receives usage data. This is verifiable: searching the `server/`, `windows/`, `ui/`, `ui-html/` and `installer/` trees for `telemetry`, `analytics`, `sentry`, `matomo`, `posthog`, `amplitude`, `mixpanel`, `crashpad` and `breakpad` returns nothing.
+There is no analytics, telemetry, crash reporting, or usage measurement that leaves this machine. The input method does not record, store or transmit what you type: the only records it can keep are the optional local counters described below, and those cover character classes, activity time and candidate-choice counts, never text. No third-party SDK for those purposes is linked, and there is no endpoint that receives usage data. This is verifiable: searching the `server/`, `windows/`, `ui/` and `installer/` trees for `telemetry`, `analytics`, `sentry`, `matomo`, `posthog`, `amplitude`, `mixpanel`, `crashpad` and `breakpad` returns nothing.

 ## Local input statistics (built-in, off by default)

@@ -47,7 +47,6 @@ Windows 端的全部一方源码都在本仓，一次 clone 就能拿到完整
 | [`server/`](server/) | Server 端：算法调度、候选窗与工具栏宿主、设置程序、词库管理 |
 | [`engine/`](engine/) | 输入引擎：输入会话、候选查询、辅助码、跨进程契约、语音模块 |
 | [`ui/`](ui/) | 自研原生 GUI 框架（`msimeui`）：Win32 宿主窗口，Direct2D / DirectWrite 渲染 |
-| [`ui-html/`](ui-html/) | 界面资源（HTML / CSS / JS）：候选窗、悬浮工具栏、托盘菜单、设置页 |
 | [`installer/`](installer/) | 收集各组件产物、自签名、Inno Setup 打包 |
 | [`log/`](log/) | 各模块共用的日志采集库 |
 | [`experiments/tsf-edit-control/`](experiments/tsf-edit-control/) | 基于 Win32 TSF 的编辑控件实验工程，附最小宿主 demo |
@@ -2,7 +2,7 @@ Metasequoia IME for Windows - Third-Party Notices
 =================================================

 The installer ships the TSF text service, the Server process and its helper
-executables, the WebView2 interface resources, and the dictionary and helpcode
+executables, the settings window's image assets, and the dictionary and helpcode
 data. Every binary in it statically links the input engine in engine/, which is
 licensed under the GNU General Public License version 3, so the product as a
 whole is distributed under the GPLv3; see the LICENSE file for its full text.
@@ -36,40 +36,29 @@ dependencies are installed beside it as DLLs rather than linked into it.
  Boost                   BSL-1.0       https://www.boost.org/
  miniaudio               MIT-0         https://github.com/mackron/miniaudio

-Binaries redistributed unmodified
---------------------------------
-
-  WebView2Loader.dll      Microsoft Edge WebView2 SDK
-
-The Server links the WebView2 loader and the installer ships the loader DLL as
-built by Microsoft. It is redistributed under the Microsoft Software License
-Terms for the WebView2 SDK, which permit redistribution of the loader with an
-application: https://developer.microsoft.com/microsoft-edge/webview2/
-
 Interface resources
 -------------------

-  ui-html                 GPL-3.0       ui-html/ in this repository
+  settings window assets  GPL-3.0       server/assets/settings/ in this repository

-The candidate window, floating toolbar, tray menu and settings page are HTML,
-CSS and JavaScript loaded by the Server at runtime. They are part of this
-project and carry the same license as the rest of it.
+The icons and images the settings window draws are installed into the data
+directory under assets\settings. They are part of this project and carry the
+same license as the rest of it.

 ------------------------------------------------------------------------------
 1. The input engine, msimeui and the interface resources - GNU General Public License version 3
 ------------------------------------------------------------------------------

-The input engine, the msimeui GUI framework and the WebView2 interface resources
-are all parts of this project and are licensed under the GNU General Public
-License version 3. Its full text is reproduced in the LICENSE file at the root of
-this repository and is not duplicated here. All three are directories of this
-repository rather than separate projects; the GUI framework and the interface
-resources were MSIME-UI and MSIME-UiHtml, and the engine was MSIME-Engine, until
-those repositories were archived or, in the engine's case, imported and
-specialized for Windows. See engine/UPSTREAM.md.
+The input engine, the msimeui GUI framework and the settings window's image
+assets are all parts of this project and are licensed under the GNU General
+Public License version 3. Its full text is reproduced in the LICENSE file at the
+root of this repository and is not duplicated here. All three are directories of
+this repository rather than separate projects; the GUI framework was MSIME-UI
+and the engine was MSIME-Engine, until those repositories were archived or, in
+the engine's case, imported and specialized for Windows. See engine/UPSTREAM.md.

 Sources:
-  engine/, ui/ and ui-html/ in this repository
+  engine/, ui/ and server/assets/settings/ in this repository

 ------------------------------------------------------------------------------
 2. googlepinyinime-rev, OpenCC and cpp-pinyin - Apache License 2.0
@@ -68,7 +68,7 @@ TSF DLL 被加载进宿主程序进程，采用静态 CRT 构建，不依赖运

 ### 候选窗始终不出现

-先确认已安装 **Microsoft Edge WebView2 Runtime**（在「设置 → 应用 → 已安装的应用」里搜索 WebView2）。当前版本的候选窗由 WebView2 渲染，运行时缺失会导致窗口无法显示。
+候选窗由 Server 用 Direct2D 绘制，不依赖 WebView2 Runtime。先按上一节确认 x64 运行库已安装，再在任务管理器里确认 `MetasequoiaImeServer.exe` 正在运行。在独占全屏的游戏里，候选窗会被有意隐藏，以免把游戏切出全屏。

 ### 手写识别没有候选结果

@@ -161,8 +161,8 @@ if(MSVC)
    # what the TCHAR-flavoured entry points resolve to, so a consumer that disagrees with the engine
    # would be compiling against a different API surface. WIN32_LEAN_AND_MEAN is only an
    # include-time trim of Windows.h, and forcing it on consumers breaks any of them that go on to
-    # include a header needing the fuller surface - WebView2.h, for one, relies on the `interface`
-    # macro that combaseapi.h provides.
+    # include a header needing the fuller surface - COM-based SDK headers, for instance, rely on the
+    # `interface` macro that combaseapi.h provides.
    target_compile_definitions(MetasequoiaImeEngine PUBLIC NOMINMAX UNICODE _UNICODE)
    target_compile_definitions(MetasequoiaImeEngine PRIVATE WIN32_LEAN_AND_MEAN)
    target_compile_options(MetasequoiaImeEngine PRIVATE /W4 /permissive- /utf-8 /Zc:__cplusplus)
@@ -9,7 +9,7 @@ This directory used to be a submodule of `metasequoiaime/MSIME-Engine`. It is no
 | Directory | Purpose |
 | --- | --- |
 | `core/`, `quanpin/`, `shuangpin/`, `english/`, `japanese/` | Input sessions and candidate lookup |
-| `contracts/` | The authoritative IPC wire format, dictionary format, punctuation policy and WebView message schema |
+| `contracts/` | The authoritative IPC wire format, dictionary format, punctuation policy and settings-window message schema |
 | `helpcode/` | Helpcode (形码) tables and generators |
 | `local_modes/`, `providers/`, `user_dictionary/` | Local modes, online candidate sources, the user dictionary |
 | `voice/` | Recording, WAV encoding, recognition and text cleanup; builds independently |
@@ -36,7 +36,7 @@ Formatting is driven from the repository root by `scripts/format.sh`, using the

 ## Contract rules

-The IPC wire format, opcodes, voice framing and WebView message definitions live in `contracts/` and are the single source of truth. Consumers include the same headers; do not restate them on either side. Dictionary naming is defined by `contracts/dictionary/format.json`, shared with the repository root's `scripts/dictionary_product.py`.
+The IPC wire format, opcodes, voice framing and settings-window message definitions live in `contracts/` and are the single source of truth. Consumers include the same headers; do not restate them on either side. Dictionary naming is defined by `contracts/dictionary/format.json`, shared with the repository root's `scripts/dictionary_product.py`.

 ## Data and licensing

@@ -1,25 +1,24 @@
 # WebView messages

 `messages.json` owns the message envelope, payload shape, and allowed sender windows.
-Change it here, run `python3 generate.py`, and re-sync the copy under `ui-html/` in the same
-commit. The generated TypeScript union and embedded C++ schema must pass `generate.py --check`.
+Change it here and run `python3 generate.py` in the same commit. The generated
+TypeScript union and embedded C++ schema must pass `generate.py --check`.
 `runtime.js` and `validator.h` implement the documented schema subset and run the same
 `fixtures.json` compatibility cases. The standalone CMake test requires Boost.JSON;
 the input engine itself does not acquire that dependency.

-New messages carry `protocolVersion: 1`. A missing version is accepted as legacy v1
-for existing skins; an explicit unknown version, unknown message, invalid payload,
-or message sent from the wrong window is rejected before dispatch. This is envelope
-validation, not a replacement for domain checks such as dictionary key validation,
-allowed configuration values, or the host's HTTPS URL policy.
+New messages carry `protocolVersion: 1`. A missing version is accepted as legacy v1;
+an explicit unknown version, unknown message, invalid payload, or message sent from
+the wrong window is rejected before dispatch. This is envelope validation, not a
+replacement for domain checks such as dictionary key validation, allowed configuration
+values, or the host's HTTPS URL policy.

-`ui-html/scripts/sync-contracts.py` materializes these bindings into
-`ui-html/webview2/shared` and checks byte equality; CI runs it with `--check`, which
-now compares against this directory directly rather than against a pinned submodule.
-Settings imports the typed serializer and checks incoming messages. Classic candidate,
-toolbar and menu pages load the same runtime from the host's `https://msime-contracts/`
-virtual mapping; packaging must include `webview2/shared`.
-
-Server-to-page candidate rendering currently uses the existing view functions;
-this contract covers WebMessage actions and settings responses. Candidate view
-model ownership is documented separately from transport envelopes.
+The name is historical: the contract was written for the WebView2 pages, which have
+been removed. Its live consumer is the Direct2D settings window
+(`server/src/settings/native/`), which posts client messages to and receives server
+messages from `server/src/settings/settings_app.cpp` in exactly this format. The
+`candidate`, `toolbar` and `menu` surfaces and the window-chrome messages (`dragStart`,
+`resizeHitTest`, `windowControl`, `maximizeButtonRect`, `windowState`, `maxButtonEvent`)
+no longer have a sender or receiver in the product; they stay in the schema so old
+fixtures keep validating. The generated JavaScript and TypeScript bindings likewise have
+no in-repo consumer any more.
@@ -1,872 +0,0 @@
-<!DOCTYPE html>
-<html lang="zh-CN">
-
-<head>
-  <meta charset="UTF-8" />
-  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>(MVI)Settings</title>
-  <link rel="icon" href="./imgs/app.png">
-  <style>
-    :root {
-      --accent-color: #8e8cd8;
-      --bg-color: #202020;
-      --sidebar-hover: rgba(255, 255, 255, 0.08);
-      --item-active: rgba(255, 255, 255, 0.06);
-      --text-color: #f3f3f3;
-      --subtext-color: #c7c7c7;
-      --border-color: rgba(255, 255, 255, 0.08);
-      --card-bg: rgba(38, 38, 38, 0.6);
-      --input-bg: rgba(45, 45, 45, 0.8);
-      --danger: #c95f5f;
-      --ok: #4caf81;
-    }
-
-    * {
-      box-sizing: border-box;
-      font-family: "Noto Sans SC", "Segoe UI Variable", "Segoe UI", sans-serif;
-    }
-
-    body {
-      margin: 0;
-      width: 100vw;
-      height: 100vh;
-      display: flex;
-      color: var(--text-color);
-      background: var(--bg-color);
-      overflow: hidden;
-    }
-
-    .sidebar {
-      width: 220px;
-      padding: 16px 10px;
-      overflow-y: auto;
-      position: relative;
-      /* scrollbar-width: thin; */
-      scrollbar-color: rgba(170, 170, 170, 0.35) transparent;
-    }
-
-    .sidebar-header {
-      display: flex;
-      align-items: center;
-      gap: 10px;
-      padding: 0 10px 16px;
-      margin-bottom: 6px;
-    }
-
-    .sidebar-header .logo {
-      width: 28px;
-      height: 28px;
-      border-radius: 6px;
-      object-fit: cover;
-      display: block;
-    }
-
-    .sidebar-header .name {
-      font-size: 18px;
-      font-weight: 600;
-    }
-
-    .nav-item {
-      margin: 4px 6px;
-      padding: 10px 12px;
-      border-radius: 8px;
-      color: #e8e8e8;
-      cursor: default;
-      display: flex;
-      align-items: center;
-      gap: 10px;
-      position: relative;
-      user-select: none;
-    }
-
-    .nav-item:hover {
-      background: var(--sidebar-hover);
-    }
-
-    .nav-item.active {
-      background: var(--item-active);
-    }
-
-    .nav-indicator {
-      position: absolute;
-      left: 0;
-      top: 0;
-      width: 4px;
-      height: 18px;
-      border-radius: 4px;
-      background: var(--accent-color);
-      pointer-events: none;
-      opacity: 0;
-      z-index: 2;
-    }
-
-    .nav-indicator.ready {
-      transition: transform 0.24s ease, opacity 0.18s ease;
-    }
-
-    .content {
-      flex: 1;
-      overflow-y: auto;
-      padding: 20px;
-      /* scrollbar-width: thin; */
-      scrollbar-color: rgba(170, 170, 170, 0.35) transparent;
-      display: flex;
-      flex-direction: column;
-      align-items: center;
-    }
-
-    .sidebar::-webkit-scrollbar,
-    .content::-webkit-scrollbar {
-      width: 8px;
-      height: 8px;
-    }
-
-    .sidebar::-webkit-scrollbar-track,
-    .content::-webkit-scrollbar-track {
-      background: transparent;
-    }
-
-    .sidebar::-webkit-scrollbar-thumb,
-    .content::-webkit-scrollbar-thumb {
-      background: rgba(170, 170, 170, 0.35);
-      border-radius: 3px;
-    }
-
-    .sidebar::-webkit-scrollbar-thumb:hover,
-    .content::-webkit-scrollbar-thumb:hover {
-      background: rgba(205, 205, 205, 0.45);
-    }
-
-    .content-page {
-      display: none;
-      width: 100%;
-      max-width: 800px;
-    }
-
-    .content-page.active {
-      display: block;
-    }
-
-    .page-title {
-      margin: 0 0 14px;
-      font-size: 20px;
-      font-weight: 600;
-    }
-
-    .section {
-      background: var(--card-bg);
-      border: 1px solid var(--border-color);
-      border-radius: 10px;
-      padding: 16px;
-      margin-bottom: 16px;
-      box-shadow: 0 1px 4px rgba(0, 0, 0, 0.22);
-    }
-
-    .section-title {
-      margin: 0 0 12px;
-      color: #d2d2d2;
-      font-size: 15px;
-      font-weight: 600;
-    }
-
-    .about-text {
-      margin: 0;
-      color: #dfdfdf;
-      line-height: 1.7;
-      font-size: 14px;
-    }
-
-    .about-meta {
-      margin: 10px 0 0;
-      color: var(--subtext-color);
-      font-size: 13px;
-      line-height: 1.7;
-    }
-
-    .about-link-row {
-      margin-top: 12px;
-      display: flex;
-      align-items: center;
-      gap: 10px;
-      flex-wrap: wrap;
-    }
-
-    .about-link-label {
-      color: var(--subtext-color);
-      font-size: 13px;
-    }
-
-    .about-link {
-      display: inline-flex;
-      align-items: center;
-      gap: 6px;
-      padding: 6px 12px;
-      border-radius: 999px;
-      border: 1px solid var(--border-color);
-      background: rgba(255, 255, 255, 0.04);
-      color: #e8e4ff;
-      font-size: 13px;
-      text-decoration: none;
-      transition: background 0.2s ease, border-color 0.2s ease, transform 0.18s ease;
-    }
-
-    .about-link:hover {
-      background: rgba(142, 140, 216, 0.2);
-      border-color: rgba(142, 140, 216, 0.55);
-      transform: translateY(-1px);
-    }
-
-    .about-link:focus-visible {
-      outline: 2px solid rgba(142, 140, 216, 0.55);
-      outline-offset: 2px;
-    }
-
-    .field {
-      display: grid;
-      gap: 6px;
-      margin-bottom: 12px;
-    }
-
-    .field:last-child {
-      margin-bottom: 0;
-    }
-
-    .field label {
-      font-size: 13px;
-      color: var(--subtext-color);
-    }
-
-    input[type="text"],
-    input[type="password"] {
-      width: 100%;
-      background: var(--input-bg);
-      border: 1px solid var(--border-color);
-      border-radius: 8px;
-      color: #f3f3f3;
-      padding: 9px 10px;
-      font-size: 14px;
-      outline: none;
-    }
-
-    input[type="text"]:focus,
-    input[type="password"]:focus {
-      border-color: var(--accent-color);
-    }
-
-    input[type="password"] {
-      letter-spacing: 2px;
-      font-family: "Segoe UI", sans-serif;
-    }
-
-    .dropdown {
-      position: relative;
-      width: 100%;
-    }
-
-    .dropdown-toggle {
-      width: 100%;
-      background: var(--input-bg);
-      border: 1px solid var(--border-color);
-      border-radius: 8px;
-      color: #f3f3f3;
-      padding: 9px 10px;
-      font-size: 14px;
-      display: flex;
-      justify-content: space-between;
-      align-items: center;
-      cursor: pointer;
-      text-align: left;
-    }
-
-    .dropdown-toggle:hover {
-      background: rgba(50, 50, 50, 0.9);
-    }
-
-    .dropdown.open .dropdown-toggle {
-      border-color: var(--accent-color);
-    }
-
-    .arrow {
-      width: 18px;
-      height: 18px;
-      display: flex;
-      align-items: center;
-      justify-content: center;
-      flex-shrink: 0;
-    }
-
-    .arrow svg {
-      width: 18px;
-      height: 18px;
-      display: block;
-      transition: transform 0.4s ease;
-      transform-origin: center;
-    }
-
-    .dropdown.open .arrow svg {
-      transform: rotate(180deg);
-    }
-
-    .dropdown-menu {
-      display: none;
-      position: absolute;
-      top: calc(100% + 4px);
-      left: 0;
-      width: 100%;
-      background: #282828;
-      border: 1px solid var(--border-color);
-      border-radius: 10px;
-      padding: 2px;
-      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
-      z-index: 20;
-    }
-
-    .dropdown.open .dropdown-menu {
-      display: block;
-    }
-
-    .dropdown-item {
-      width: 100%;
-      border: 0;
-      background: transparent;
-      color: #eee;
-      border-radius: 8px;
-      padding: 7px 8px;
-      text-align: left;
-      cursor: pointer;
-      font-size: 14px;
-    }
-
-    .dropdown-item:hover {
-      background: rgba(255, 255, 255, 0.08);
-      color: #fff;
-    }
-
-    .switch-row {
-      display: flex;
-      justify-content: space-between;
-      align-items: center;
-      padding: 8px 0;
-      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
-    }
-
-    .switch-row:last-child {
-      border-bottom: 0;
-    }
-
-    .switch-label {
-      display: flex;
-      flex-direction: column;
-      gap: 2px;
-    }
-
-    .switch-label strong {
-      font-size: 14px;
-      font-weight: 500;
-    }
-
-    .switch-label span {
-      font-size: 12px;
-      color: var(--subtext-color);
-    }
-
-    .switch-input {
-      appearance: none;
-      -webkit-appearance: none;
-      width: 38px;
-      height: 20px;
-      border-radius: 999px;
-      background: #555;
-      position: relative;
-      cursor: pointer;
-      transition: background 0.2s ease;
-      border: 1px solid transparent;
-      flex-shrink: 0;
-    }
-
-    .switch-input::after {
-      content: "";
-      position: absolute;
-      top: 50%;
-      left: 1px;
-      width: 16px;
-      height: 16px;
-      border-radius: 50%;
-      background: #fff;
-      transform: translateY(-50%);
-      transition: transform 0.2s ease;
-      box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
-    }
-
-    .switch-input:checked {
-      background: var(--accent-color);
-    }
-
-    .switch-input:checked::after {
-      transform: translate(18px, -50%);
-    }
-
-    .actions {
-      margin-top: 18px;
-      display: flex;
-      gap: 10px;
-      align-items: center;
-      width: 100%;
-      max-width: 800px;
-    }
-
-    .actions.hidden {
-      display: none;
-    }
-
-    button {
-      border: 0;
-      border-radius: 8px;
-      padding: 9px 14px;
-      cursor: default;
-      font-size: 14px;
-    }
-
-    .btn-primary {
-      background: #3c2d47;
-      color: #fff;
-    }
-
-    .btn-secondary {
-      background: #3a3a3a;
-      color: #f3f3f3;
-    }
-
-    .status {
-      font-size: 13px;
-      color: var(--subtext-color);
-      min-height: 18px;
-    }
-
-    .status.ok {
-      color: var(--ok);
-    }
-
-    .status.err {
-      color: var(--danger);
-    }
-
-    @media (max-width: 760px) {
-      body {
-        flex-direction: column;
-      }
-
-      .sidebar {
-        width: 100%;
-        border-right: 0;
-        border-bottom: 1px solid var(--border-color);
-        padding: 10px;
-      }
-
-      .content {
-        padding: 12px;
-      }
-    }
-  </style>
-</head>
-
-<body>
-  <aside class="sidebar">
-    <div class="sidebar-header">
-      <img class="logo" src="imgs/app.png" alt="App Logo" />
-      <div class="name">水杉记言</div>
-    </div>
-
-    <div class="nav-item active" data-target="api-page">🔌 API 配置</div>
-    <div class="nav-item" data-target="basic-page">🧩 基础设置</div>
-    <div class="nav-item" data-target="about-page">ℹ️ 关于</div>
-  </aside>
-
-  <main class="content">
-    <section id="api-page" class="content-page active">
-      <h1 class="page-title">API 配置</h1>
-
-      <div class="section">
-        <h2 class="section-title">ASR 接口（[asr_api]）</h2>
-        <div class="field">
-          <label for="asr-provider">provider</label>
-          <input id="asr-provider" type="text" value="siliconflow" />
-        </div>
-        <div class="field">
-          <label for="asr-token">token</label>
-          <input id="asr-token" type="password" value="" placeholder="填入你自己的 SiliconFlow API key" />
-        </div>
-        <div class="field">
-          <label for="asr-endpoint">endpoint</label>
-          <input id="asr-endpoint" type="text" value="https://api.siliconflow.cn/v1/audio/transcriptions" />
-        </div>
-      </div>
-
-      <div class="section">
-        <h2 class="section-title">润色接口（[polish_api]）</h2>
-        <div class="field">
-          <label for="polish-provider">provider</label>
-          <input id="polish-provider" type="text" value="siliconflow" />
-        </div>
-        <div class="field">
-          <label for="polish-token">token</label>
-          <input id="polish-token" type="password" value="" placeholder="填入你自己的 SiliconFlow API key" />
-        </div>
-        <div class="field">
-          <label for="polish-endpoint">endpoint</label>
-          <input id="polish-endpoint" type="text" value="https://api.siliconflow.cn/v1/chat/completions" />
-        </div>
-      </div>
-    </section>
-
-    <section id="basic-page" class="content-page">
-      <h1 class="page-title">基础设置</h1>
-
-      <div class="section">
-        <h2 class="section-title">[settings]</h2>
-
-        <div class="field">
-          <label for="language-btn">language</label>
-          <div class="dropdown" id="language-dropdown">
-            <button id="language-btn" class="dropdown-toggle" type="button">
-              <span class="dropdown-value">zh-cn</span>
-              <span class="arrow" aria-hidden="true">
-                <svg viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg">
-                  <path d="M5.5 7.5L10 12L14.5 7.5" stroke="#cfcfcf" stroke-width="1.8" stroke-linecap="round"
-                    stroke-linejoin="round" />
-                </svg>
-              </span>
-            </button>
-            <div class="dropdown-menu">
-              <button class="dropdown-item" type="button" data-value="zh-cn">zh-cn</button>
-              <button class="dropdown-item" type="button" data-value="en-us">en-us</button>
-            </div>
-            <input id="language" type="hidden" value="zh-cn" />
-          </div>
-        </div>
-
-        <div class="field">
-          <label for="stt-provider-btn">云端语音识别</label>
-          <div class="dropdown" id="stt-provider-dropdown">
-            <button id="stt-provider-btn" class="dropdown-toggle" type="button">
-              <span class="dropdown-value">cloud_siliconflow</span>
-              <span class="arrow" aria-hidden="true">
-                <svg viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg">
-                  <path d="M5.5 7.5L10 12L14.5 7.5" stroke="#cfcfcf" stroke-width="1.8" stroke-linecap="round"
-                    stroke-linejoin="round" />
-                </svg>
-              </span>
-            </button>
-            <div class="dropdown-menu">
-              <button class="dropdown-item" type="button" data-value="cloud_siliconflow">cloud_siliconflow</button>
-            </div>
-            <input id="stt-provider" type="hidden" value="cloud_siliconflow" />
-          </div>
-        </div>
-
-        <div class="switch-row">
-          <div class="switch-label">
-            <strong>上屏前先进行文本润色</strong>
-            <span>polish_text</span>
-          </div>
-          <input id="polish-text" class="switch-input" type="checkbox" />
-        </div>
-
-        <div class="switch-row">
-          <div class="switch-label">
-            <strong>触发时播放提示音</strong>
-            <span>notification_sound</span>
-          </div>
-          <input id="notification-sound" class="switch-input" type="checkbox" checked />
-        </div>
-      </div>
-    </section>
-
-    <section id="about-page" class="content-page">
-      <h1 class="page-title">关于</h1>
-
-      <div class="section">
-        <h2 class="section-title">项目简介</h2>
-        <p class="about-text">
-          <span>水杉记言</span>(Metasequoia Voice
-          Input)是一个面向中文输入场景的开源语音输入工具，源代码在 GitHub 上可查看。本项目通过语音识别(ASR)将语音实时转换为文本，并可选接入文本润色能力，帮助你以更自然、更高效的方式完成输入。
-        </p>
-        <br>
-        <p class="about-text">
-          当前设置窗口用于管理 ASR API、润色 API 和基础行为配置。您可以在“API 配置”和“基础设置”中修改参数，并通过“保存设置”提交到宿主程序。
-        </p>
-        <br>
-        <div class="about-link-row">
-          <span class="about-link-label">GitHub:</span>
-          <a class="about-link" href="https://github.com/metasequoiaime/MSIME-Engine/tree/main/voice" target="_blank"
-            rel="noopener noreferrer">MetasequoiaVoiceInput ↗</a>
-        </div>
-        <div class="about-link-row">
-          <span class="about-link-label">作者的更多作品，Windows 文字输入法：</span>
-          <a class="about-link" href="https://github.com/fanlumaster/MetasequoiaImeTsf" target="_blank"
-            rel="noopener noreferrer">水杉输入法 ↗</a>
-        </div>
-      </div>
-    </section>
-
-    <div class="actions">
-      <button id="save-btn" class="btn-primary" type="button">保存设置</button>
-      <button id="reset-btn" class="btn-secondary" type="button">恢复默认</button>
-      <span id="status" class="status"></span>
-    </div>
-  </main>
-
-  <script>
-    const defaultConfig = {
-      asr_api: {
-        provider: "siliconflow",
-        token: "",
-        endpoint: "https://api.siliconflow.cn/v1/audio/transcriptions"
-      },
-      polish_api: {
-        provider: "siliconflow",
-        token: "",
-        endpoint: "https://api.siliconflow.cn/v1/chat/completions"
-      },
-      settings: {
-        language: "zh-cn",
-        polish_text: false,
-        notification_sound: true,
-        stt_provider: "cloud_siliconflow"
-      }
-    };
-
-    const $ = (id) => document.getElementById(id);
-
-    function setStatus(text, type) {
-      const el = $("status");
-      el.textContent = text;
-      el.classList.remove("ok", "err");
-      if (type) {
-        el.classList.add(type);
-      }
-    }
-
-    function mergeConfigWithDefaults(config) {
-      const safe = config && typeof config === "object" ? config : {};
-      const asr = safe.asr_api && typeof safe.asr_api === "object" ? safe.asr_api : {};
-      const polish = safe.polish_api && typeof safe.polish_api === "object" ? safe.polish_api : {};
-      const settings = safe.settings && typeof safe.settings === "object" ? safe.settings : {};
-
-      return {
-        asr_api: {
-          provider: typeof asr.provider === "string" ? asr.provider : defaultConfig.asr_api.provider,
-          token: typeof asr.token === "string" ? asr.token : defaultConfig.asr_api.token,
-          endpoint: typeof asr.endpoint === "string" ? asr.endpoint : defaultConfig.asr_api.endpoint
-        },
-        polish_api: {
-          provider: typeof polish.provider === "string" ? polish.provider : defaultConfig.polish_api.provider,
-          token: typeof polish.token === "string" ? polish.token : defaultConfig.polish_api.token,
-          endpoint: typeof polish.endpoint === "string" ? polish.endpoint : defaultConfig.polish_api.endpoint
-        },
-        settings: {
-          language: typeof settings.language === "string" ? settings.language : defaultConfig.settings.language,
-          polish_text: typeof settings.polish_text === "boolean" ? settings.polish_text : defaultConfig.settings.polish_text,
-          notification_sound: typeof settings.notification_sound === "boolean" ? settings.notification_sound : defaultConfig.settings.notification_sound,
-          stt_provider: defaultConfig.settings.stt_provider
-        }
-      };
-    }
-
-    function readConfigFromForm() {
-      return {
-        asr_api: {
-          provider: $("asr-provider").value.trim(),
-          token: $("asr-token").value.trim(),
-          endpoint: $("asr-endpoint").value.trim()
-        },
-        polish_api: {
-          provider: $("polish-provider").value.trim(),
-          token: $("polish-token").value.trim(),
-          endpoint: $("polish-endpoint").value.trim()
-        },
-        settings: {
-          language: $("language").value,
-          polish_text: $("polish-text").checked,
-          notification_sound: $("notification-sound").checked,
-          stt_provider: $("stt-provider").value
-        }
-      };
-    }
-
-    function applyConfigToForm(config) {
-      $("asr-provider").value = config.asr_api.provider;
-      $("asr-token").value = config.asr_api.token;
-      $("asr-endpoint").value = config.asr_api.endpoint;
-
-      $("polish-provider").value = config.polish_api.provider;
-      $("polish-token").value = config.polish_api.token;
-      $("polish-endpoint").value = config.polish_api.endpoint;
-
-      $("language").value = config.settings.language;
-      $("polish-text").checked = config.settings.polish_text;
-      $("notification-sound").checked = config.settings.notification_sound;
-      $("stt-provider").value = config.settings.stt_provider;
-      syncDropdownText("language-dropdown");
-      syncDropdownText("stt-provider-dropdown");
-    }
-
-    function closeAllDropdowns() {
-      document.querySelectorAll(".dropdown.open").forEach((el) => {
-        el.classList.remove("open");
-      });
-    }
-
-    function syncDropdownText(dropdownId) {
-      const dropdown = document.getElementById(dropdownId);
-      if (!dropdown) {
-        return;
-      }
-      const hiddenInput = dropdown.querySelector("input[type='hidden']");
-      const valueEl = dropdown.querySelector(".dropdown-value");
-      const activeItem = dropdown.querySelector(`.dropdown-item[data-value="${hiddenInput.value}"]`);
-      valueEl.textContent = activeItem ? activeItem.textContent : hiddenInput.value;
-    }
-
-    function initDropdown(dropdownId) {
-      const dropdown = document.getElementById(dropdownId);
-      if (!dropdown) {
-        return;
-      }
-      const toggle = dropdown.querySelector(".dropdown-toggle");
-      const hiddenInput = dropdown.querySelector("input[type='hidden']");
-
-      toggle.addEventListener("click", (event) => {
-        event.stopPropagation();
-        const willOpen = !dropdown.classList.contains("open");
-        closeAllDropdowns();
-        if (willOpen) {
-          dropdown.classList.add("open");
-        }
-      });
-
-      dropdown.querySelectorAll(".dropdown-item").forEach((item) => {
-        item.addEventListener("click", () => {
-          hiddenInput.value = item.dataset.value;
-          syncDropdownText(dropdownId);
-          dropdown.classList.remove("open");
-        });
-      });
-
-      syncDropdownText(dropdownId);
-    }
-
-    function ensureNavIndicator() {
-      const sidebar = document.querySelector(".sidebar");
-      if (!sidebar) {
-        return null;
-      }
-      let indicator = sidebar.querySelector(".nav-indicator");
-      if (!indicator) {
-        indicator = document.createElement("div");
-        indicator.className = "nav-indicator";
-        sidebar.appendChild(indicator);
-      }
-      return indicator;
-    }
-
-    function moveNavIndicatorToItem(item) {
-      const sidebar = document.querySelector(".sidebar");
-      const indicator = ensureNavIndicator();
-      if (!sidebar || !indicator || !item) {
-        return;
-      }
-
-      const barLeft = item.offsetLeft - 2;
-      const barTop = item.offsetTop + (item.offsetHeight - 18) / 2;
-      if (!indicator.classList.contains("ready")) {
-        indicator.classList.add("ready");
-        indicator.style.transition = "none";
-        indicator.style.transform = `translate(${barLeft}px, ${barTop}px)`;
-        indicator.style.opacity = "1";
-        requestAnimationFrame(() => {
-          indicator.style.transition = "";
-        });
-        return;
-      }
-      indicator.style.transform = `translate(${barLeft}px, ${barTop}px)`;
-      indicator.style.opacity = "1";
-    }
-
-    function updateActionsVisibility(targetId) {
-      const actions = document.querySelector(".actions");
-      if (!actions) {
-        return;
-      }
-      const shouldHide = targetId === "about-page";
-      actions.classList.toggle("hidden", shouldHide);
-    }
-
-    document.querySelectorAll(".nav-item").forEach((item) => {
-      item.addEventListener("click", () => {
-        document.querySelector(".nav-item.active")?.classList.remove("active");
-        item.classList.add("active");
-
-        document.querySelector(".content-page.active")?.classList.remove("active");
-        const targetId = item.dataset.target;
-        document.getElementById(targetId)?.classList.add("active");
-        updateActionsVisibility(targetId);
-        moveNavIndicatorToItem(item);
-      });
-    });
-
-    $("save-btn").addEventListener("click", () => {
-      const config = readConfigFromForm();
-      try {
-        if (window.chrome?.webview) {
-          window.chrome.webview.postMessage({ action: "save_settings", config });
-        } else {
-          setStatus("当前不在宿主环境，无法写入配置文件", "err");
-          return;
-        }
-      } catch (err) {
-        setStatus("保存失败: " + String(err), "err");
-      }
-    });
-
-    $("reset-btn").addEventListener("click", () => {
-      applyConfigToForm(defaultConfig);
-      setStatus("已恢复默认值", "ok");
-    });
-
-    document.addEventListener("click", () => {
-      closeAllDropdowns();
-    });
-
-    window.__applyHostConfig = (config) => {
-      const normalized = mergeConfigWithDefaults(config);
-      applyConfigToForm(normalized);
-      setStatus("已加载本地配置", "ok");
-    };
-
-    window.__onHostSaveResult = (result) => {
-      if (!result || typeof result !== "object") {
-        setStatus("保存结果无效", "err");
-        return;
-      }
-      const message = typeof result.message === "string" ? result.message : (result.success ? "设置已保存" : "保存失败");
-      setStatus(message, result.success ? "ok" : "err");
-    };
-
-    initDropdown("language-dropdown");
-    initDropdown("stt-provider-dropdown");
-    applyConfigToForm(defaultConfig);
-    updateActionsVisibility("api-page");
-    moveNavIndicatorToItem(document.querySelector(".nav-item.active"));
-
-    if (window.chrome?.webview) {
-      window.chrome.webview.postMessage({ action: "load_settings" });
-    }
-
-    window.addEventListener("resize", () => {
-      moveNavIndicatorToItem(document.querySelector(".nav-item.active"));
-    });
-  </script>
-</body>
-
-</html>
@@ -1,98 +0,0 @@
-<!DOCTYPE html>
-<html lang="zh-CN">
-
-<head>
-  <meta charset="UTF-8">
-  <title>(MetasequoiaVoiceInput)TrayMenu</title>
-  <style>
-    body {
-      background-color: transparent;
-      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
-      color: #fff;
-      margin: 0;
-      padding: 0;
-    }
-
-    .menu {
-      background-color: #2b2b2b;
-      border: 1px solid #3a3a3a;
-      border-radius: 8px;
-      padding: 0.2em 0;
-      width: 6em;
-      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
-      user-select: none;
-    }
-
-    .menu-item {
-      display: flex;
-      justify-content: space-between;
-      align-items: center;
-      padding: 0.4em 0.4em;
-      font-size: 14px;
-      color: #e0e0e0;
-      border-radius: 6px;
-      margin: 1px 6px;
-    }
-
-    .menu-item:hover {
-      background-color: #3b3b3b;
-      color: #fff;
-    }
-
-    .menu-item-left {
-      display: flex;
-      align-items: center;
-      gap: 6px;
-    }
-  </style>
-</head>
-
-<body>
-  <div class="menu" id="menuContainer">
-    <div class="menu-item" id="settings">
-      <div class="menu-item-left">
-        <span>⚙️</span>
-        设置
-      </div>
-    </div>
-
-    <div class="menu-item" id="about">
-      <div class="menu-item-left">
-        <span>ℹ️</span>
-        关于
-      </div>
-    </div>
-
-    <div class="menu-item" id="exit">
-      <div class="menu-item-left">
-        <span>⏹️</span>
-        退出
-      </div>
-    </div>
-  </div>
-
-  <script>
-    // 设置：向 C++ 端发送消息，打开设置
-    const settings = document.getElementById('settings');
-    settings.addEventListener('click', () => {
-      console.log("settings");
-      window.chrome.webview.postMessage("open_settings");
-    });
-
-    // 关于：向 C++ 端发送消息，打开设置并切到关于页面
-    const about = document.getElementById('about');
-    about.addEventListener('click', () => {
-      console.log("about");
-      window.chrome.webview.postMessage("open_about");
-    });
-
-    // 退出：向 C++ 端发送消息，退出程序
-    const exit = document.getElementById('exit');
-    exit.addEventListener('click', () => {
-      console.log("exit");
-      window.chrome.webview.postMessage("exit");
-    });
-  </script>
-</body>
-
-</html>
@@ -3,10 +3,9 @@ if(NOT WIN32 OR NOT MSIME_VOICE_CAPTURE)
 endif()
 find_package(fmt CONFIG REQUIRED)
 find_package(tomlplusplus CONFIG REQUIRED)
-find_path(WEBVIEW2_INCLUDE_DIR WebView2.h REQUIRED)
-add_executable(MetasequoiaVoiceInput WIN32 src/main.cpp src/cue_player.cpp src/mvi_config.cpp src/mvi_utils.cpp src/send_input.cpp src/wave_overlay.cpp src/window_webview2.cpp src/resource/app.rc)
+add_executable(MetasequoiaVoiceInput WIN32 src/main.cpp src/cue_player.cpp src/mvi_config.cpp src/mvi_utils.cpp src/send_input.cpp src/wave_overlay.cpp src/tray_ui.cpp src/resource/app.rc)
 target_compile_definitions(MetasequoiaVoiceInput PRIVATE UNICODE _UNICODE NOMINMAX)
 target_compile_options(MetasequoiaVoiceInput PRIVATE /utf-8)
 target_link_options(MetasequoiaVoiceInput PRIVATE /ENTRY:mainCRTStartup)
-target_include_directories(MetasequoiaVoiceInput PRIVATE src src/resource ../../third_party/miniaudio ${WEBVIEW2_INCLUDE_DIR})
+target_include_directories(MetasequoiaVoiceInput PRIVATE src src/resource ../../third_party/miniaudio)
 target_link_libraries(MetasequoiaVoiceInput PRIVATE MetasequoiaIme::Voice MetasequoiaIme::VoiceCapture fmt::fmt nlohmann_json::nlohmann_json tomlplusplus::tomlplusplus d2d1 User32 dwmapi shell32)
@@ -65,17 +65,7 @@ polish_text = false
 stt_provider = "cloud_siliconflow"
 ```

-You can also change these config in settings window:
-
-![](https://i.imgur.com/Q3Jct2Z.png)
-
-![](https://i.imgur.com/9j2IV9X.png)
-
-![](https://i.imgur.com/1F47neV.png)
-
-## Notice
-
- Only implemented dark-mode UI now
+The tray icon's right-click menu has **设置** (opens `config.toml` in the editor associated with `.toml`, falling back to Notepad, and writes the defaults first if the file does not exist), **关于** and **退出**. Double-clicking the tray icon toggles recording. Changes to `config.toml` take effect the next time the host starts.

 ## License

@@ -21,7 +21,7 @@
 #include "wave_overlay.h"
 #include "cue_player.h"
 #include "text_polisher.h"
-#include "window_webview2.h"
+#include "tray_ui.h"
 #include <fmt/format.h>
 #include <fmt/xchar.h>
 #include <windows.h>
@@ -392,14 +392,12 @@ int main()
        MSG init_msg{};
        PeekMessage(&init_msg, nullptr, WM_USER, WM_USER, PM_NOREMOVE);

-        window_webview2::TrayMenuConfig tray_config{};
+        tray_ui::TrayMenuConfig tray_config{};
        tray_config.main_thread_id = g_main_thread_id;
        tray_config.msg_toggle_record = WM_APP_TOGGLE_RECORD;
        tray_config.msg_exit = WM_APP_EXIT;
        tray_config.app_name = L"MetasequoiaVoiceInput";
-        tray_config.default_width = 300;
-        tray_config.default_height = 360;
-        if (!window_webview2::InitializeTrayUi(app_instance, tray_config))
+        if (!tray_ui::InitializeTrayUi(app_instance, tray_config))
        {
            throw std::runtime_error("Tray UI init failed");
        }
@@ -612,7 +610,7 @@ int main()
        force_release_ralt_key();

        UnhookWindowsHookEx(keyboard_hook);
-        window_webview2::ShutdownTrayUi(app_instance);
+        tray_ui::ShutdownTrayUi(app_instance);
        wave_overlay.shutdown();

        // 通知 stt 线程停止
@@ -627,7 +625,7 @@ int main()
    }
    catch (const std::exception &e)
    {
-        window_webview2::ShutdownTrayUi(app_instance);
+        tray_ui::ShutdownTrayUi(app_instance);
        printf("FATAL ERROR: %s\n", e.what());
        fflush(stdout);
        MessageBoxA(nullptr, e.what(), "MetasequoiaVoiceInput - Fatal Error", MB_ICONERROR);
@@ -0,0 +1,248 @@
+#include "tray_ui.h"
+#include "mvi_config.h"
+#include "resource/resource.h"
+#include <atomic>
+#include <cstdio>
+#include <objbase.h>
+#include <shellapi.h>
+#include <thread>
+
+namespace tray_ui
+{
+namespace
+{
+constexpr UINT WM_APP_TRAY_ICON = WM_APP + 120;
+constexpr UINT k_tray_icon_id = 1;
+constexpr wchar_t k_tray_window_class[] = L"MetasequoiaVoiceInput.TrayWindow";
+constexpr wchar_t k_tray_tooltip[] = L"MetasequoiaVoiceInput";
+constexpr wchar_t k_project_url[] = L"https://github.com/metasequoiaime/MSIME-Engine/tree/main/voice";
+
+enum TrayCommand : UINT
+{
+    k_cmd_settings = 1,
+    k_cmd_about,
+    k_cmd_exit,
+};
+
+struct TrayUiState
+{
+    TrayMenuConfig config{};
+    HWND tray_window = nullptr;
+    NOTIFYICONDATAW notify_icon{};
+    bool notify_icon_added = false;
+    HICON tray_icon = nullptr;
+};
+
+TrayUiState g_state;
+std::atomic<bool> g_about_open{false};
+
+std::wstring AnsiToWide(const std::string &text)
+{
+    if (text.empty())
+    {
+        return L"";
+    }
+    const int size = MultiByteToWideChar(CP_ACP, 0, text.c_str(), static_cast<int>(text.size()), nullptr, 0);
+    if (size <= 0)
+    {
+        return L"";
+    }
+    std::wstring result(size, L'\0');
+    MultiByteToWideChar(CP_ACP, 0, text.c_str(), static_cast<int>(text.size()), result.data(), size);
+    return result;
+}
+
+// There is no settings form: the menu opens config.toml in the user's editor. A missing file is
+// first written with the defaults so there is something to edit.
+void OpenConfigFile()
+{
+    const std::string config_path = mvi_config::GetConfigPath();
+    if (config_path.empty())
+    {
+        printf("[SETTINGS] LOCALAPPDATA is empty; cannot locate config.toml.\n");
+        fflush(stdout);
+        return;
+    }
+
+    const std::wstring wide_path = AnsiToWide(config_path);
+    if (GetFileAttributesW(wide_path.c_str()) == INVALID_FILE_ATTRIBUTES)
+    {
+        std::string error_message;
+        if (!mvi_config::WriteConfigFromJson("{}", &error_message))
+        {
+            printf("[SETTINGS] Failed to create default config.toml: %s\n", error_message.c_str());
+            fflush(stdout);
+            return;
+        }
+    }
+
+    const auto result = reinterpret_cast<INT_PTR>(ShellExecuteW(nullptr, L"open", wide_path.c_str(), nullptr, nullptr, SW_SHOWNORMAL));
+    if (result > 32)
+    {
+        return;
+    }
+
+    // .toml frequently has no association; fall back to Notepad.
+    const std::wstring quoted = L"\"" + wide_path + L"\"";
+    ShellExecuteW(nullptr, L"open", L"notepad.exe", quoted.c_str(), nullptr, SW_SHOWNORMAL);
+}
+
+// A MessageBox on the main thread would run a modal loop that drops the thread messages the
+// keyboard hook posts, so the About box lives on its own short-lived thread.
+void ShowAbout()
+{
+    bool expected = false;
+    if (!g_about_open.compare_exchange_strong(expected, true))
+    {
+        return;
+    }
+
+    std::thread([]() {
+        const HRESULT hr = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
+        const int choice = MessageBoxW(nullptr,
+                                       L"水杉记言 (Metasequoia Voice Input) 是一个面向中文输入场景的开源语音输入工具，"
+                                       L"通过云端语音识别 (ASR) 将语音转换为文本，并可选接入文本润色。\n\n"
+                                       L"设置项保存在 %LOCALAPPDATA%\\MetasequoiaVoiceInput\\config.toml。\n\n"
+                                       L"是否在浏览器中打开项目主页？",
+                                       L"关于 MetasequoiaVoiceInput", MB_YESNO | MB_ICONINFORMATION | MB_SETFOREGROUND);
+        if (choice == IDYES)
+        {
+            ShellExecuteW(nullptr, L"open", k_project_url, nullptr, nullptr, SW_SHOWNORMAL);
+        }
+        if (SUCCEEDED(hr))
+        {
+            CoUninitialize();
+        }
+        g_about_open = false;
+    }).detach();
+}
+
+void ShowTrayMenu(HWND hwnd)
+{
+    HMENU menu = CreatePopupMenu();
+    if (menu == nullptr)
+    {
+        return;
+    }
+    AppendMenuW(menu, MF_STRING, k_cmd_settings, L"设置（编辑 config.toml）");
+    AppendMenuW(menu, MF_STRING, k_cmd_about, L"关于");
+    AppendMenuW(menu, MF_SEPARATOR, 0, nullptr);
+    AppendMenuW(menu, MF_STRING, k_cmd_exit, L"退出");
+
+    POINT cursor{};
+    GetCursorPos(&cursor);
+
+    // The foreground/WM_NULL pair is what makes the menu dismiss on an outside click.
+    SetForegroundWindow(hwnd);
+    UINT flags = TPM_RIGHTBUTTON | TPM_RETURNCMD | TPM_NONOTIFY;
+    flags |= GetSystemMetrics(SM_MENUDROPALIGNMENT) != 0 ? TPM_RIGHTALIGN : TPM_LEFTALIGN;
+    const UINT command = static_cast<UINT>(TrackPopupMenuEx(menu, flags, cursor.x, cursor.y, hwnd, nullptr));
+    PostMessageW(hwnd, WM_NULL, 0, 0);
+    DestroyMenu(menu);
+
+    switch (command)
+    {
+    case k_cmd_settings:
+        OpenConfigFile();
+        break;
+    case k_cmd_about:
+        ShowAbout();
+        break;
+    case k_cmd_exit:
+        printf("[TRAY] Exit selected from tray menu.\n");
+        fflush(stdout);
+        PostThreadMessageW(g_state.config.main_thread_id, g_state.config.msg_exit, 0, 0);
+        break;
+    default:
+        break;
+    }
+}
+
+LRESULT CALLBACK TrayWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+    if (message == WM_APP_TRAY_ICON)
+    {
+        const UINT event = LOWORD(lParam);
+        if (event == WM_RBUTTONUP || event == WM_CONTEXTMENU)
+        {
+            ShowTrayMenu(hwnd);
+            return 0;
+        }
+        if (event == WM_LBUTTONDBLCLK && g_state.config.msg_toggle_record != 0)
+        {
+            PostThreadMessageW(g_state.config.main_thread_id, g_state.config.msg_toggle_record, 0, 0);
+            return 0;
+        }
+        return 0;
+    }
+    return DefWindowProcW(hwnd, message, wParam, lParam);
+}
+} // namespace
+
+bool InitializeTrayUi(HINSTANCE instance, const TrayMenuConfig &config)
+{
+    g_state = {};
+    g_state.config = config;
+
+    WNDCLASSW wc{};
+    wc.lpfnWndProc = TrayWindowProc;
+    wc.hInstance = instance;
+    wc.lpszClassName = k_tray_window_class;
+    RegisterClassW(&wc);
+
+    // A hidden top-level window rather than HWND_MESSAGE: TrackPopupMenu needs an owner that can
+    // become the foreground window, which a message-only window cannot.
+    g_state.tray_window = CreateWindowExW(WS_EX_TOOLWINDOW, k_tray_window_class, L"MetasequoiaVoiceInput.TrayHost", WS_POPUP, 0, 0, 0, 0, nullptr, nullptr, instance, nullptr);
+    if (g_state.tray_window == nullptr)
+    {
+        printf("[TRAY] Failed to create tray host window: %lu\n", GetLastError());
+        fflush(stdout);
+        return false;
+    }
+
+    g_state.tray_icon = static_cast<HICON>(LoadImageW(instance, MAKEINTRESOURCEW(IDI_APP_ICON), IMAGE_ICON, 0, 0, LR_DEFAULTSIZE));
+    if (g_state.tray_icon == nullptr)
+    {
+        g_state.tray_icon = LoadIconW(nullptr, IDI_APPLICATION);
+    }
+
+    g_state.notify_icon = {};
+    g_state.notify_icon.cbSize = sizeof(NOTIFYICONDATAW);
+    g_state.notify_icon.hWnd = g_state.tray_window;
+    g_state.notify_icon.uID = k_tray_icon_id;
+    g_state.notify_icon.uFlags = NIF_MESSAGE | NIF_ICON | NIF_TIP;
+    g_state.notify_icon.uCallbackMessage = WM_APP_TRAY_ICON;
+    g_state.notify_icon.hIcon = g_state.tray_icon;
+    wcscpy_s(g_state.notify_icon.szTip, k_tray_tooltip);
+
+    if (!Shell_NotifyIconW(NIM_ADD, &g_state.notify_icon))
+    {
+        printf("[TRAY] Failed to add tray icon.\n");
+        fflush(stdout);
+        return false;
+    }
+
+    g_state.notify_icon_added = true;
+    g_state.notify_icon.uVersion = NOTIFYICON_VERSION_4;
+    Shell_NotifyIconW(NIM_SETVERSION, &g_state.notify_icon);
+
+    printf("[TRAY] Tray icon initialized.\n");
+    fflush(stdout);
+    return true;
+}
+
+void ShutdownTrayUi(HINSTANCE instance)
+{
+    if (g_state.notify_icon_added)
+    {
+        Shell_NotifyIconW(NIM_DELETE, &g_state.notify_icon);
+        g_state.notify_icon_added = false;
+    }
+    if (g_state.tray_window != nullptr)
+    {
+        DestroyWindow(g_state.tray_window);
+        g_state.tray_window = nullptr;
+    }
+    UnregisterClassW(k_tray_window_class, instance);
+}
+} // namespace tray_ui
@@ -3,7 +3,7 @@
 #include <string>
 #include <windows.h>

-namespace window_webview2
+namespace tray_ui
 {
 struct TrayMenuConfig
 {
@@ -11,11 +11,8 @@ struct TrayMenuConfig
    UINT msg_toggle_record = 0;
    UINT msg_exit = 0;
    std::wstring app_name = L"MetasequoiaVoiceInput";
-    std::wstring tray_menu_html_path;
-    int default_width = 194;
-    int default_height = 299;
 };

 bool InitializeTrayUi(HINSTANCE instance, const TrayMenuConfig &config);
 void ShutdownTrayUi(HINSTANCE instance);
-} // namespace window_webview2
+} // namespace tray_ui
@@ -8,8 +8,7 @@
      "description": "Standalone Windows host dependencies",
      "dependencies": [
        "fmt",
-        "tomlplusplus",
-        "webview2"
+        "tomlplusplus"
      ]
    }
  }
@@ -98,7 +98,7 @@ icon = "#f6e4eb"
 - `font_family` 排在用户设置的字体前面，缺字时回落到用户字体；字号始终由用户设置决定。
 - `page_arrows = true` 可以打开候选框里的翻页箭头；不写时沿用 `base` 内置皮肤的设置（出厂为关闭）。
 - `fit_content = true` 让卡片严格按候选文字的宽度收紧，不再垫出厂最小宽度；`min_width_dip` 和装饰图宽度仍然生效。不写时沿用 `base` 内置皮肤的设置（出厂为关闭）。
- `[toolbar]` 下的所有键都可以省略，没写的沿用 `base` 皮肤；配置对 D2D 和 WebView2 两种工具栏渲染器都生效。
+- `[toolbar]` 下的所有键都可以省略，没写的沿用 `base` 皮肤。
 - `[supports].themes` 里声明的每套主题都要有对应的 `[candidate.<theme>]`；写了 `[toolbar]` 的话，也要有对应的 `[toolbar.<theme>]`。

 完整字段见 [schema/README.md](schema/README.md)。
@@ -1,6 +1,6 @@
 # 外部皮肤 manifest（TOML）

-每个皮肤目录需要 `skin.toml`，`id` 必须与文件夹名一致。`schema_version` 支持 `1` 与 `2`（v2 为面向全贴图与复杂立绘皮肤的高级规范，仅在 WebView2 端全面启用，Direct2D 原生端保底降级）。
+每个皮肤目录需要 `skin.toml`，`id` 必须与文件夹名一致。`schema_version` 支持 `1` 与 `2`（v2 为面向全贴图与复杂立绘皮肤的高级规范）。候选框由 Direct2D 原生渲染器绘制；v2 的部分字段在原生端仍在补全，下文标「v2」的字段以实际效果为准。

 候选框和悬浮工具栏都由 `skin.toml` 声明，不要再提供 `cand.css` 或工具栏 CSS。所有图片路径都相对于皮肤目录，且不能指向目录之外。

@@ -20,7 +20,7 @@
 - `shadow`：卡片阴影，`none` | `soft` | `strong`；不写则沿用 `base`。只影响候选卡片，不影响右键菜单
 - `font_family`：候选字体名，UTF-8 编码后最长 64 字节（约 21 个汉字），不能含引号、反斜杠、逗号、分号、尖括号、花括号和反引号。排在用户设置的字体前面，缺字时仍回落到用户字体；字号不由皮肤决定
 - `page_arrows`：候选框里的翻页箭头，`true` | `false`。横排时是候选右侧贴着最后一行的一小列，竖排时是最后一行下方的一矮行、“‹”与序号左对齐；颜色取 `number`，悬停底色取 `hover`。不写则沿用 `base` 的默认皮肤设置（数据目录 `skins\default\<base>\skin.toml`，出厂为 `false`）
- `fit_content`：卡片是否严格按候选文字所需的宽度收紧，`true` | `false`。打开后不再垫出厂的最小宽度（D2D 160 DIP、WebView2 `7em`），同一次输入里后到的翻译等内容消失时宽度也立刻缩回；`min_width_dip` 和装饰图 `width_dip` 仍然生效。不写则沿用 `base` 的默认皮肤设置（出厂为 `false`）
+- `fit_content`：卡片是否严格按候选文字所需的宽度收紧，`true` | `false`。打开后不再垫出厂的最小宽度（160 DIP），同一次输入里后到的翻译等内容消失时宽度也立刻缩回；`min_width_dip` 和装饰图 `width_dip` 仍然生效。不写则沿用 `base` 的默认皮肤设置（出厂为 `false`）

 ### `[candidate_window.decoration]`（可选）

@@ -38,7 +38,7 @@
 - `fit`：`cover`（铺满裁切）| `contain`（完整显示）| `stretch`（拉伸）
 - `opacity`：`0`–`1`

-### `[candidate_window.border_image]`（v2 可选，仅 WebView2）
+### `[candidate_window.border_image]`（v2 可选）

 九宫格背景拉伸，面板整体贴图，用于全贴图与复杂纹理面板。

@@ -48,7 +48,7 @@
 - `width_dip`：可选，边框绘制宽度，支持 1~4 个值
 - `fill`：可选，布尔值，是否保留九宫格中心内容区域，默认为 `true`

-### `[candidate_window.content_insets_dip]`（v2 可选，仅 WebView2）
+### `[candidate_window.content_insets_dip]`（v2 可选）

 候选框内容与文字的安全内边距，**从面板外缘量起**，用来避开贴图四周自带的花纹或立绘。渲染时会把该方向的边框宽度扣掉，落到内容盒上。

@@ -66,7 +66,7 @@

 **不声明时窗口只按卡片大小开，挂到卡片外面的立绘会被窗口边界裁掉。**

-### `[[candidate_window.decorations]]`（v2 可选，数组表，仅 WebView2）
+### `[[candidate_window.decorations]]`（v2 可选，数组表）

 自由锚定立绘挂件层，支持叠加角色立绘与 APNG 动图，层数不限。

@@ -114,7 +114,7 @@ translation_separator = "#529cca73"

 ## `[toolbar]`

-悬浮工具栏样式，D2D 与 WebView2 两个渲染器都生效。所有键都可省略，不写的沿用 `base`。
+悬浮工具栏样式。所有键都可省略，不写的沿用 `base`。

 - `corner_radius_dip`：`0`–`32`
 - `[toolbar.dark]` / `[toolbar.light]`：`background`、`border`、`handle`（左侧拖动条）、`divider`、`icon`、`hover`
@@ -131,5 +131,5 @@ translation_separator = "#529cca73"
 | `rgba(r, g, b, a)` | `rgba(224, 138, 168, 0.28)` | `a` 为 0–1 |
 | `transparent` | `transparent` | 全透明，等同 `#0000` |

- 十六进制大小写均可，但**必须带 `#`**：原生（D2D）渲染器不带 `#` 也能识别，WebView2 渲染器按 CSS 解析，会把它当作无效值，两种渲染结果就不一致了。
+- 十六进制大小写均可，但**必须带 `#`**：这是清单格式的约定，与 CSS 写法一致；渲染器对不带 `#` 的写法有容错，但不要依赖它。
 - 不透明度在**末尾**（`#RRGGBBAA`），不是 Windows 常见的 `#AARRGGBB`。例如 `#e9e8e89d` 约为 62% 不透明，`rgba(224, 138, 168, 0.28)` 与 `#e08aa847` 等价。
@@ -5,7 +5,7 @@
 # 颜色写法：所有颜色键（[candidate.*]、[candidate.*.menu]、[toolbar.*] 里除 show_selected_bar 外的键）
 # 都接受下面任意一种，不能写颜色的是数字、布尔、枚举和路径类的键。
 #   - 十六进制：#rgb、#rgba、#rrggbb、#rrggbbaa，大小写均可。
-#       必须带 #：原生渲染器不带 # 也能认，但 WebView2 按 CSS 解析，会把它当成无效值。
+#       必须带 #：这是清单格式的约定，与 CSS 写法一致；渲染器不带 # 也能认，但不要依赖它。
 #       不透明度在末尾（#RRGGBBAA），不是 Windows 常见的 #AARRGGBB；例如 #e9e8e89d ≈ 62% 不透明。
 #   - rgb(r, g, b) / rgba(r, g, b, a)：r、g、b 为 0–255，a 为 0–1。
 #       例如 rgba(224, 138, 168, 0.28) 与 #e08aa847 等价。
@@ -139,7 +139,7 @@ text = "#3a2a30"
 hover = "rgba(196, 92, 122, 0.12)"

 # ---------------------------------------------------------------------------
-# 悬浮工具栏：D2D 与 WebView2 两个渲染器都生效，所有键都可省略，不写的沿用 base
+# 悬浮工具栏：所有键都可省略，不写的沿用 base
 # ---------------------------------------------------------------------------
 [toolbar]
 corner_radius_dip = 8                      # 工具栏圆角，0–32
@@ -12,8 +12,8 @@

 [CmdletBinding()]
 param(
-    # 轻量包：跳过词库、辅助码、拼音表和出厂配置，只刷新 TSF、Server、HTML。
-    # 适用：只改了 TSF、Server 或 HTML，本机已有完整安装（词库已在
+    # 轻量包：跳过词库、辅助码、拼音表和出厂配置，只刷新 TSF、Server 和设置窗口图片资源。
+    # 适用：只改了 TSF 或 Server，本机已有完整安装（词库已在
    # %LOCALAPPDATA%\metasequoiaime）。不要用轻量包做首次安装。
    [switch]$Light,
    # 把 PDB 打进安装包。PDB 有 ~140 MB，而真正的二进制只有 ~20 MB，Inno Setup 还要对它们做
@@ -34,12 +34,11 @@ try {
    $repoRoot = Split-Path -Parent $PSScriptRoot
    $tsfCompile = Join-Path $repoRoot 'windows\scripts\lcompile-release-both.ps1'
    $serverCompile = Join-Path $repoRoot 'server\scripts\lcompile-release.ps1'
-    $settingsDir = Join-Path $repoRoot 'ui-html\webview2\settings\ime-settings'

-    # All three are directories of this repository now, so a missing one is a broken checkout rather
+    # Both are directories of this repository now, so a missing one is a broken checkout rather
    # than a neighbour nobody cloned. Skipping the build and packaging whatever binaries happen to be
    # lying around would produce an installer you then run on your own machine.
-    foreach ($required in @($tsfCompile, $serverCompile, (Join-Path $settingsDir 'package.json'))) {
+    foreach ($required in @($tsfCompile, $serverCompile)) {
        if (-not (Test-Path -LiteralPath $required -PathType Leaf)) {
            throw "缺少组件构建入口：$required"
        }
@@ -51,16 +50,6 @@ try {
    Push-Location (Join-Path $repoRoot 'server')
    try { & $serverCompile -Reconfigure:$Reconfigure } finally { Pop-Location }

-    Push-Location $settingsDir
-    try {
-        # 首次运行或 node_modules 缺失时需要安装依赖
-        if (-not (Test-Path -LiteralPath 'node_modules' -PathType Container)) {
-            pnpm install
-            if ($LASTEXITCODE -ne 0) { throw "Settings page dependencies installation failed ($LASTEXITCODE)" }
-        }
-        pnpm run build
-        if ($LASTEXITCODE -ne 0) { throw "Settings page build failed ($LASTEXITCODE)" }
-    } finally { Pop-Location }

    # 轻量包不带任何数据文件，所以只有完整包需要语言模型。脚本是幂等的：摘要对得上时
    # 直接返回，不重下也不重转，因此这里无条件调用不会让日常 test.ps1 变慢。首次运行
@@ -79,7 +68,7 @@ try {
    }

    & (Join-Path $PSScriptRoot 'Prepare-PackageFiles.ps1') -Light:$Light -IncludeSymbols:$IncludeSymbols `
-        -RepoRoot $repoRoot -TsfDirectory windows -ServerDirectory server -UiHtmlDirectory ui-html -NoticesDirectory .
+        -RepoRoot $repoRoot -TsfDirectory windows -ServerDirectory server -NoticesDirectory .
    & (Join-Path $PSScriptRoot 'Sign-PackageBinaries-Local.ps1')
    & (Join-Path $PSScriptRoot 'Compile-Installer.ps1') -Light:$Light
    & (Join-Path $PSScriptRoot 'Sign-Installer-Local.ps1') -Light:$Light
@@ -6,7 +6,6 @@ param(
    # Historical or custom layouts remain available through explicit overrides.
    [string]$TsfDirectory = 'windows',
    [string]$ServerDirectory = 'server',
-    [string]$UiHtmlDirectory = 'ui-html',
    [string]$HelpCodeDirectory = 'engine/helpcode',
    # U 模式的部件拆字反查表（decomposition.txt）随包发布到数据目录的 radical\ 下。
    [string]$RadicalDirectory = 'engine/radical',
@@ -65,7 +64,8 @@ $tsf32Release = Join-Path $RepoRoot (Join-Path $TsfDirectory 'build32-release\Re
 $tsf64Release = Join-Path $RepoRoot (Join-Path $TsfDirectory 'build64-release\Release\MetasequoiaImeTsf.dll')
 $tsf32Pdb = Join-Path $RepoRoot (Join-Path $TsfDirectory 'build32-release\Release\MetasequoiaImeTsf.pdb')
 $tsf64Pdb = Join-Path $RepoRoot (Join-Path $TsfDirectory 'build64-release\Release\MetasequoiaImeTsf.pdb')
-$webviewRoot = Join-Path $RepoRoot (Join-Path $UiHtmlDirectory 'webview2')
+# 原生（Direct2D）设置窗口用到的图标与图片，按原相对路径装到数据目录的 assets\settings\。
+$settingsAssets = Join-Path $RepoRoot (Join-Path $ServerDirectory 'assets\settings')
 $defaultSkinsSource = Join-Path $RepoRoot 'skins\default'
 $bundledSkinsSource = Join-Path $RepoRoot 'skins'
 $serverConfig = Join-Path $RepoRoot (Join-Path $ServerDirectory 'assets\config\config.toml')
@@ -117,11 +117,7 @@ Assert-PathExists -LiteralPath $appIcon -Description '应用图标'
 Assert-PathExists -LiteralPath $tipIcon -Description '输入法语言配置图标 msime.ico'
 Assert-PathExists -LiteralPath $thirdPartyNotices -Description '第三方声明 THIRD_PARTY_NOTICES.txt'
 Assert-PathExists -LiteralPath $license -Description '许可证 LICENSE'
-Assert-PathExists -LiteralPath (Join-Path $webviewRoot 'shared') -Description '共享 WebView 消息契约'
-Assert-PathExists -LiteralPath (Join-Path $webviewRoot 'candwnd') -Description '候选窗 HTML 目录'
-Assert-PathExists -LiteralPath (Join-Path $webviewRoot 'ftb') -Description '悬浮工具栏 HTML 目录'
-Assert-PathExists -LiteralPath (Join-Path $webviewRoot 'menu') -Description '菜单 HTML 目录'
-Assert-PathExists -LiteralPath (Join-Path $webviewRoot 'settings\ime-settings\dist') -Description '设置页面 dist 目录'
+Assert-PathExists -LiteralPath $settingsAssets -Description '设置窗口图片资源目录'
 Assert-PathExists -LiteralPath $defaultSkinsSource -Description '内置皮肤设置清单 skins\default'

 if (-not $Light) {
@@ -160,7 +156,7 @@ $targetServer = Join-Path $PSScriptRoot 'server_exe'
 $targetTsf = Join-Path $PSScriptRoot 'tsf_dll'

 if ($Light) {
-    Write-Host '轻量模式：跳过词库、辅助码、拼音表和出厂配置，只刷新 TSF、Server、HTML。'
+    Write-Host '轻量模式：跳过词库、辅助码、拼音表和出厂配置，只刷新 TSF、Server 和设置窗口图片资源。'
    New-Item -ItemType Directory -Path $targetAppData -Force | Out-Null
 }
 else {
@@ -235,17 +231,17 @@ else {
    Copy-Item -LiteralPath $radicalTable -Destination (Join-Path $targetRadical 'decomposition.txt') -Force
 }

-$targetHtml = Join-Path $targetAppData 'html'
-if (Test-Path -LiteralPath $targetHtml) {
-    Remove-Item -LiteralPath $targetHtml -Recurse -Force
+# 轻量模式不清空 app_data，旧版本留下的 html\（WebView2 页面）要在这里删掉，免得被打进包里。
+$legacyHtml = Join-Path $targetAppData 'html'
+if (Test-Path -LiteralPath $legacyHtml) {
+    Remove-Item -LiteralPath $legacyHtml -Recurse -Force
 }
-$targetWebview = Join-Path $targetHtml 'webview2'
-Copy-DirectoryContents -Source (Join-Path $webviewRoot 'shared') -Destination (Join-Path $targetWebview 'shared')
-Copy-DirectoryContents -Source (Join-Path $webviewRoot 'candwnd') -Destination (Join-Path $targetWebview 'candwnd')
-Copy-DirectoryContents -Source (Join-Path $webviewRoot 'ftb') -Destination (Join-Path $targetWebview 'ftb')
-Copy-DirectoryContents -Source (Join-Path $webviewRoot 'menu') -Destination (Join-Path $targetWebview 'menu')
-Copy-DirectoryContents -Source (Join-Path $webviewRoot 'settings\ime-settings\dist') `
-    -Destination (Join-Path $targetWebview 'settings\ime-settings\dist')
+$targetAssets = Join-Path $targetAppData 'assets'
+$targetSettingsAssets = Join-Path $targetAssets 'settings'
+if (Test-Path -LiteralPath $targetAssets) {
+    Remove-Item -LiteralPath $targetAssets -Recurse -Force
+}
+Copy-DirectoryContents -Source $settingsAssets -Destination $targetSettingsAssets

 # 内置皮肤的设置清单（翻页箭头等开关）。用户会就地改这些 skin.toml，安装脚本用
 # onlyifdoesntexist 落到数据目录的 skins\default，升级只补缺失的文件、不覆盖已有的。
@@ -356,20 +352,6 @@ $updatedIss = [regex]::Replace(
 $updatedIss = $updatedIss.TrimEnd("`r", "`n") + "`n"
 Set-Content -LiteralPath $targetIss -Value $updatedIss -Encoding utf8NoBOM -NoNewline

-# 设置页是已构建的静态资源，同步其“当前版本”展示。
-$settingsDist = Join-Path $targetWebview 'settings\ime-settings\dist'
-Get-ChildItem -LiteralPath $settingsDist -Recurse -File -Include '*.js', '*.html' | ForEach-Object {
-    $content = Get-Content -LiteralPath $_.FullName -Raw
-    $updated = [regex]::Replace(
-        $content,
-        '(<div class="about-version">)v\d+(?:\.\d+)+(</div>)',
-        "`$1v$TargetVersion`$2"
-    )
-    if ($updated -ne $content) {
-        Set-Content -LiteralPath $_.FullName -Value $updated -Encoding utf8NoBOM
-    }
-}
-
 $serverBinaryCount = @(Get-ChildItem -LiteralPath $targetServer -Recurse -File -Include '*.exe', '*.dll').Count
 $tsfBinaryCount = @(Get-ChildItem -LiteralPath $targetTsf -Recurse -File -Include '*.exe', '*.dll').Count
 $symbolCount = @(
@@ -13,14 +13,14 @@

 ## CI 契约

-根 `.github/workflows/release.yml` **不加修改地调用本目录的 `Prepare-PackageFiles.ps1` 和 `Compile-Installer.ps1`**。源目录名是 `Prepare-PackageFiles.ps1` 的参数，不是写死在脚本里的字面量：默认值为 `windows/`、`server/`、`ui-html/` 和仓根授权文件；旧目录或自定义布局通过参数覆盖。回归检查同时执行默认路径和显式参数的打包。辅助码默认读取 `engine/helpcode/`，词库缓存位于 `MetasequoiaImeDict/out/`。
+根 `.github/workflows/release.yml` **不加修改地调用本目录的 `Prepare-PackageFiles.ps1` 和 `Compile-Installer.ps1`**。源目录名是 `Prepare-PackageFiles.ps1` 的参数，不是写死在脚本里的字面量：默认值为 `windows/`、`server/` 和仓根授权文件；旧目录或自定义布局通过参数覆盖。回归检查同时执行默认路径和显式参数的打包。辅助码默认读取 `engine/helpcode/`，词库缓存位于 `MetasequoiaImeDict/out/`。

 合仓后 release workflow 传的是本仓的目录名，辅助码随固定 Engine gitlink 检出，词库按产品锁下载到仓根缓存：

 ```powershell
 pwsh -File ./Prepare-PackageFiles.ps1 -TargetVersion 1.2.3 -RepoRoot .. `
    -TsfDirectory windows -ServerDirectory server `
-    -UiHtmlDirectory ui-html -NoticesDirectory .
+    -NoticesDirectory .
 ```

 由此产生几条约束：
@@ -34,14 +34,14 @@ pwsh -File ./Prepare-PackageFiles.ps1 -TargetVersion 1.2.3 -RepoRoot .. `

 ## 数据目录

-程序本体固定装在 `Program Files\metasequoiaime`（Server 带 `uiAccess=true`，只有装在受信任目录里这个标志才生效），**用户数据目录可以在安装向导里改**：词库、`config.toml`、用户词库、皮肤和前端资源都在那里，整包几百 MB，装 C 盘吃紧的用户可以放到别的盘。
+程序本体固定装在 `Program Files\metasequoiaime`（Server 带 `uiAccess=true`，只有装在受信任目录里这个标志才生效），**用户数据目录可以在安装向导里改**：词库、`config.toml`、用户词库、皮肤和设置窗口的图片资源都在那里，整包几百 MB，装 C 盘吃紧的用户可以放到别的盘。

 - 默认值 `%LOCALAPPDATA%\metasequoiaime`；升级安装时默认沿用上次的位置
 - 选择写进 `HKLM\Software\Metasequoia\MetasequoiaIME` 的 `DataDir`。这是运行期唯一的权威来源：Server（`server/src/utils/ime_paths.cpp`）、TSF DLL（`windows/src/Utils/FanyUtils.cpp`）和引擎（`engine/core/data_path.h`）各自按 `METASEQUOIA_IME_DATA_DIR` 环境变量 → 该注册表值 → `%LOCALAPPDATA%\metasequoiaime` 的顺序解析，三处必须保持一致。32 位 TSF DLL 用 `KEY_WOW64_64KEY` 读，所以这个值必须写在 64 位视图里
- 升级时改了位置，安装器会把用户词库（`msime_user.db` 及其 WAL/SHM）、`config.toml`、`config.base.toml` 和 `skins\` 搬到新目录，再删掉旧目录；词库和前端资源由本次安装重新写入，不搬
+- 升级时改了位置，安装器会把用户词库（`msime_user.db` 及其 WAL/SHM）、`config.toml`、`config.base.toml` 和 `skins\` 搬到新目录，再删掉旧目录；词库和设置窗口的图片资源由本次安装重新写入，不搬
 - **数据目录必须整个归输入法**（[#537](https://github.com/metasequoiaime/MSIME-Windows/issues/537)）。用户选的目录里已经有别的文件、或者选了驱动器根目录时，安装器改用其中的 `metasequoiaime` 子目录，并在向导里把实际位置告诉用户；连那个子目录也不空就拒绝。输入法用过的目录（有标记，或历史默认位置）原样沿用
 - 安装器在数据目录里放一个 `.metasequoiaime-data` 标记文件。只有标记里带 `exclusive: adopted empty by the installer` 这一行（安装时目录是空的），或目录就是历史默认位置，覆盖安装才整目录清理、卸载才整目录删除
- 旧版安装器不管目录里原来有什么都写标记，所以只有旧标记（没有那一行）的目录不能再信：覆盖安装、换目录和卸载都只按 `IsShippedAppDataItem` / `IsRuntimeAppDataItem` / `IsPreservedAppDataItem` 名单删输入法自己的条目，`html`、`logs`、`skins` 这种通用目录名只删输入法写进去的部分，最后目录空了才删目录。包里新增顶层文件要同步 `IsShippedAppDataItem`，`tests/package-files.ps1` 会拿真实打出的 `app_data` 核对；Server 在数据目录根下新写文件要同步 `IsRuntimeAppDataItem`
+- 旧版安装器不管目录里原来有什么都写标记，所以只有旧标记（没有那一行）的目录不能再信：覆盖安装、换目录和卸载都只按 `IsShippedAppDataItem` / `IsRuntimeAppDataItem` / `IsPreservedAppDataItem` 名单删输入法自己的条目，`assets`、`logs`、`skins` 这种通用目录名（以及已退役的 `html`）只删输入法写进去的部分，最后目录空了才删目录。包里新增顶层文件要同步 `IsShippedAppDataItem`，`tests/package-files.ps1` 会拿真实打出的 `app_data` 核对；Server 在数据目录根下新写文件要同步 `IsRuntimeAppDataItem`
 - 仓库 `skins\` 下的外部皮肤（除 `default\` 和素材授权为 `UNVERIFIED*` 的）随包装到 `skins\<id>`，完整包和轻量包都带，卸载不删。`Prepare-PackageFiles.ps1` 同时写出 `bundled_skins.manifest`（每行 `id|相对路径|sha256`），安装器在 `PrepareToInstall` 里拿它核对用户机器上的同名目录：文件集合和内容完全一致就直接覆盖，否则先改名成 `<id>.bak`（已有就 `<id>.2.bak`……，不覆盖旧备份）再装。Server 扫描皮肤时跳过 `*.bak` 目录。`tests/bundled-skins.ps1` 把这段 Pascal 编进探针安装器真跑一遍
 - 静默安装用 `/DATADIR="D:\MetasequoiaIME"` 指定；该值在 `PrepareToInstall` 里和向导页走同一套换子目录和校验

@@ -68,20 +68,18 @@ Windows CI 运行 `installer/tests/cloud-choice.ps1`，用 Inno Setup 跑八个

 ## 运行时依赖检查

-安装包不携带 WebView2 Runtime 和 VC 运行库——前者有自己的 Evergreen 更新通道，后者是系统级共享组件。缺 VC 运行库 Server 起不来；缺 WebView2 设置页打不开，但默认的 D2D 候选窗（以及表情 / 键盘 / 手写面板，都是 `msimeui` 原生绘制）照常可用，选了 `appearance.ui_backend = "webview2"` 的 Server 启动时检测不到运行时会临时退回 D2D（`FallBackToD2dIfWebView2RuntimeMissing`，不改配置，装好后下次启动自动恢复）。这些故障都出现在安装结束之后，用户看不到任何解释。所以 `msime_setup.iss` 的 `InitializeSetup` 在安装开始前先查一遍，缺哪个就当场说清楚，并给出下载地址。
+安装包不携带 VC 运行库，它是系统级共享组件。缺了它 Server 起不来，而这个故障出现在安装结束之后，用户看不到任何解释。所以 `msime_setup.iss` 的 `InitializeSetup` 在安装开始前先查一遍，缺了就当场说清楚，并给出下载地址。界面全部由 `msimeui` 以 Direct2D 绘制，不再依赖 WebView2 Runtime；旧版本留下的 WebView2 用户数据（`ProgramData\metasequoiaime\webview2`、`webview2-settings`，以及 `%LOCALAPPDATA%\metasequoiaime` 下的同名回退目录）由安装器在升级和卸载时清掉。

- **Microsoft Edge WebView2 Runtime**：读 EdgeUpdate 客户端键 `{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}` 的 `pv`。机器级安装由 32 位的 EdgeUpdate 写入，所以主查 `HKLM32`，再看 `HKLM64` 和 `HKCU`（用户级安装）。`pv` 缺失或残留成 `0.0.0.0` 都算没装
 - **Visual C++ 2015–2022 可再发行组件包（x64）**：读 `Software\Microsoft\VisualStudio\14.0\VC\Runtimes\x64` 的 `Installed` / `Major` / `Minor`，`HKLM32` 和 `HKLM64` 两个视图都查。要求 **14.40 以上**（常量 `VCRuntimeMinMinor`）：`server_exe\` 里的 exe 用 MSVC 14.40+（VS 2022 17.10 起）编译并导入 `msvcp140.dll`，这一版起 `std::mutex` 的构造函数是 constexpr，配上更旧的 `msvcp140.dll` 会在第一次加锁时访问冲突、无声闪退——设置页「点了没反应」就是这个现象。装了 2019 / 早期 2022 运行库的机器同样有 `Installed=1`，所以必须比版本号。构建工具链升级到要求更高 redist 时同步调高这个常量。32 位 TSF DLL 用静态 CRT（`windows/CMakeLists.txt` 的 `CMAKE_MSVC_RUNTIME_LIBRARY`），所以不检查 x86 redist
 - **不要改成查 `System32` 里的 DLL。** Setup.exe 是 32 位进程，Pascal Script 的 `FileExists` 会被 WOW64 重定向到 `SysWOW64`，查到的是 x86 运行库；只装了 x64 redist 的机器会被误判成缺少 x64 运行库。绕开重定向的办法不可移植：`EnableFsRedirection` 在 Inno Setup 7 里已被移除，而它的替代品在 CI 用的 6.x 里还不存在
- 缺组件或版本过旧时弹一次对话框，区分「没装」和「已装 x.y 但过旧」，列出直接下载链接（VC++：`https://aka.ms/vc14/vc_redist.x64.exe`；WebView2 Evergreen Bootstrapper：`https://go.microsoft.com/fwlink/p/?LinkId=2124703`）和对应的说明页：选「是」直接下载这些安装包并结束安装，选「否」继续装。**不阻断安装**——用户可能马上就要去补组件，也可能只是在准备环境。静默安装（CI、批量部署）用 `SuppressibleMsgBox` 默认「否」直接继续，缺什么已经写进安装日志（`/LOG=`）
- 安装时检查只是第一道关：用户可能选了「否」，也可能事后卸掉或损坏了 WebView2。所以设置进程在 WebView2 environment / controller 创建失败（含运行时缺失时的同步失败）时会弹框说明原因和错误码、给出同一条 WebView2 直链并退出，而不是留一个空白窗口
+- 缺组件或版本过旧时弹一次对话框，区分「没装」和「已装 x.y 但过旧」，列出直接下载链接（`https://aka.ms/vc14/vc_redist.x64.exe`）和说明页：选「是」直接下载安装包并结束安装，选「否」继续装。**不阻断安装**——用户可能马上就要去补组件，也可能只是在准备环境。静默安装（CI、批量部署）用 `SuppressibleMsgBox` 默认「否」直接继续，缺什么已经写进安装日志（`/LOG=`）

 ## 依赖

 - Windows 10/11，PowerShell 7（`pwsh`）
 - [Inno Setup](https://jrsoftware.org/isinfo.php) 6.6 或更高版本
 - Windows SDK（提供 `signtool.exe`）
- 先初始化本仓 submodule，并完成 `windows/`、`server/` 的 Release 编译以及 `ui-html/` 设置页构建。Release 构建必须生成同目录 PDB；打包脚本会拒绝缺少匹配符号的产物（符号是否随包安装是另一回事，由 `-IncludeSymbols` 决定）。
+- 先初始化本仓 submodule，并完成 `windows/`、`server/` 的 Release 编译。Release 构建必须生成同目录 PDB；打包脚本会拒绝缺少匹配符号的产物（符号是否随包安装是另一回事，由 `-IncludeSymbols` 决定）。
 - 本地测试包的词库从与本仓同级的 `msime-dictionary` 检出构建（见下文 `build-dictionary.py`），`Invoke-LocalTest.ps1` 打完整包前会自动调用，不再下载产品锁的 Release；需要复现发布用的词库时再手动运行 `python scripts/product_lock.py fetch-dictionaries --staging-root .`。
 - 词格整句打分用的 `sc.lm` 由 `scripts\build-language-model.ps1` 从 `language-model\lock.json` 钉住的上游语料转换而来。`Invoke-LocalTest.ps1` 打完整包前会自动调它，一般不用手工执行；首次运行要下 ~75 MB 并转换一次，之后摘要对得上就直接跳过。
 - 本地打完整包前，可以直接运行 `scripts\prepare-package-inputs.ps1`，一次准备好神经整句模型、`sc.lm` 和词库。模型按各自的锁校验 SHA256，已就绪的直接跳过；词库用 `build-dictionary.py --if-stale` 从本地 `msime-dictionary` 构建。
@@ -152,7 +150,7 @@ pwsh -File .\package-simplysign-symbols.ps1 1.2.3

 ### Hotfix 轻量包

-只修 TSF / Server / HTML 的 hotfix 可以发轻量包，签名流程与完整包相同（包内 EXE/DLL 和最终安装包都签）：
+只修 TSF / Server / 设置窗口资源的 hotfix 可以发轻量包，签名流程与完整包相同（包内 EXE/DLL 和最终安装包都签）：

 ```powershell
 pwsh -File .\package-simplysign-light.ps1 1.2.4
@@ -174,15 +174,9 @@ linear_step = 1
 [appearance]
 # 主题模式，可选："dark", "light", "system"
 theme_mode = "system"
-# 候选窗 / 悬浮工具栏 / 托盘菜单渲染，可选："d2d", "webview2"
-# 更改后需重启输入法进程生效
-ui_backend = "d2d"
 # 设置窗口关闭后在后台驻留多久再退出，驻留期间重新打开无需冷启动
 # 可选："off"（立即退出）, "1m", "5m", "10m", "30m", "60m", "forever"（一直驻留）
 settings_window_linger = "off"
-# 设置窗口渲染方式，可选："webview2", "d2d"（Direct2D，实验性）
-# 更改后设置窗口会自动重新打开
-settings_ui_backend = "webview2"
 # 分表面主题，可选："follow", "dark", "light"（follow = 跟随 theme_mode）
 theme_settings = "follow"
 theme_cand = "follow"
@@ -13,7 +13,7 @@
 ;   4. Sign-Installer-Local.ps1         用同一张本机测试证书给安装包签名
 ;
 ; 也可以直接运行 .\test.ps1 走完整测试流程。
-; 只改 TSF / Server / HTML 时用 .\test-light.ps1：ISCC /DLightPackage=1，
+; 只改 TSF / Server 时用 .\test-light.ps1：ISCC /DLightPackage=1，
 ; 打出不含词库的轻量包，安装时也不会删本机已有词库。
 ; 上面两条都不把 PDB 打进包；要带符号用 .\test-symbols.ps1。
 ; 本仓库不包含任何预置代码签名证书。
@@ -79,17 +79,13 @@ Name: "english"; MessagesFile: "compiler:Default.isl"
 Name: "{#MyTsfRoot32}\{code:GetVersionDir}"
 Name: "{#MyTsfRoot64}\{code:GetVersionDir}"
 Name: "{commonpf64}\metasequoiaime\server"
-; 用户数据（词库、配置、皮肤、前端资源）。默认在 LocalAppData，安装时可以改到别的盘，
+; 用户数据（词库、配置、皮肤、界面资源）。默认在 LocalAppData，安装时可以改到别的盘，
 ; 选择写进 HKLM 的 DataDir，Server / TSF DLL / 引擎三方都从那里读。
 Name: "{code:GetDataDir}"; Permissions: users-modify
 ; 用户自己的辅助码方案放这里，Server 扫描后列进设置页，升级时保留。
 Name: "{code:GetDataDir}\helpcodes\custom"
 ; 用户自己的双拼方案（.toml）放这里，同样由 Server 扫描、升级时保留。
 Name: "{code:GetDataDir}\shuangpin\custom"
-; WebView2 子进程是中完整性，写不进内置 Administrator 的高完整性 LocalAppData。
-Name: "{commonappdata}\metasequoiaime"
-Name: "{commonappdata}\metasequoiaime\webview2"; Permissions: users-modify
-Name: "{commonappdata}\metasequoiaime\webview2-settings"; Permissions: users-modify

 [Files]
 ; 独立安装应用图标，供 Windows“已安装的应用”列表稳定显示。
@@ -155,9 +151,9 @@ Source: "{#MySourceRoot}\bundled_skins\*"; \
 Source: "{#MySourceRoot}\bundled_skins.manifest"; Flags: dontcopy

 #ifdef LightPackage
-; 轻量包只覆盖前端 HTML，不带词库/辅助码/出厂配置。
-Source: "{#MySourceRoot}\app_data\html\*"; \
-    DestDir: "{code:GetDataDir}\html"; \
+; 轻量包只覆盖设置窗口的图片资源，不带词库/辅助码/出厂配置。
+Source: "{#MySourceRoot}\app_data\assets\settings\*"; \
+    DestDir: "{code:GetDataDir}\assets\settings"; \
    Flags: ignoreversion recursesubdirs createallsubdirs uninsneveruninstall
 #else
 ; 包内故意不带 config.toml。通配复制再排除一次，防止以后又把用户配置打进包内。
@@ -208,16 +204,9 @@ const
  { 用户选的目录里已有别的文件时，数据改放到这个子目录里。}
  DataDirSubfolderName = 'metasequoiaime';

-  { WebView2 Evergreen Runtime 在 EdgeUpdate 里的固定客户端 ID。}
-  WebView2ClientKey =
-    'Software\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}';
-  { 安装器界面本身就是中文（InitializeSetup 在选语言对话框之前跑，拿不到用户选的语言），
-    下载页也统一给简体中文版，省得用户落到英文页上再自己切。}
-  WebView2DownloadUrl =
-    'https://developer.microsoft.com/zh-cn/microsoft-edge/webview2';
-  { Evergreen Bootstrapper 直链，点开就是安装器。}
-  WebView2DirectUrl = 'https://go.microsoft.com/fwlink/p/?LinkId=2124703';
  VCRuntimeKey = 'Software\Microsoft\VisualStudio\14.0\VC\Runtimes\x64';
+  { 安装器界面本身就是中文（InitializeSetup 在选语言对话框之前跑，拿不到用户选的语言），
+    说明页也统一给简体中文版，省得用户落到英文页上再自己切。}
  VCRuntimeDownloadUrl =
    'https://learn.microsoft.com/zh-cn/cpp/windows/latest-supported-vc-redist?view=msvc-170';
  { 微软给的「最新受支持 v14 x64 运行库」固定直链。}
@@ -235,29 +224,10 @@ var
  UserConfigExistedBeforeInstall: Boolean;
  DataDirAdoptedEmpty: Boolean;

-{ WebView2 Runtime 与 VC 运行库都不随包分发：前者有自己的 Evergreen 更新通道，
-  后者是系统级共享组件，安装器不该替用户装。缺 VC 运行库 Server 直接起不来；
-  缺 WebView2 设置页打不开（默认 D2D 候选窗照常可用，选了 WebView2 渲染的
-  Server 启动时会临时退回 D2D）。故障现场都在安装结束之后，用户看不到任何解释，
-  所以在安装开始前查一遍，把原因当场说清楚。
-
-  返回空串表示没装；否则是 pv 里的版本号。}
-function ReadWebView2Version: String;
-begin
-  Result := '';
-  { 机器级安装由 32 位的 EdgeUpdate 写入，键落在 WOW6432Node 下。本安装器跑在
-    64 位模式，HKLM 默认就是 64 位视图，所以主查 HKLM32；HKLM64 作为后备，
-    以防将来的 ARM64 / 原生 64 位布局换了位置。用户级安装写在 HKCU。
-    卸载没清干净的机器上 pv 可能残留成 0.0.0.0。}
-  if not RegQueryStringValue(HKLM32, WebView2ClientKey, 'pv', Result) then
-    if not RegQueryStringValue(HKLM64, WebView2ClientKey, 'pv', Result) then
-      if not RegQueryStringValue(HKCU, WebView2ClientKey, 'pv', Result) then
-        Result := '';
-  Result := Trim(Result);
-  if Result = '0.0.0.0' then
-    Result := '';
-end;
-
+// VC 运行库不随包分发：它是系统级共享组件，安装器不该替用户装。缺了它 Server 直接
+// 起不来，而故障现场在安装结束之后，用户看不到任何解释，所以在安装开始前查一遍，
+// 把原因当场说清楚。
+//
 // 用注册表判定，而不是去 System32 里找 vcruntime140.dll：Setup.exe 是 32 位进程，
 // Pascal Script 的 FileExists 会被 WOW64 重定向到 SysWOW64（[Files] 和 Exec 里的
 // {sys} 由 Inno 自己处理，脚本函数不管），结果查的是 x86 运行库——只装了 x64 redist
@@ -319,21 +289,12 @@ end;

 function InitializeSetup: Boolean;
 var
-  WebView2Version: String;
-  NeedsWebView2: Boolean;
  NeedsVCRuntime: Boolean;
  VCRuntimeVersion: String;
  Prompt: String;
 begin
  Result := True;

-  WebView2Version := ReadWebView2Version;
-  NeedsWebView2 := WebView2Version = '';
-  if NeedsWebView2 then
-    Log('Prerequisite missing: Microsoft Edge WebView2 Runtime.')
-  else
-    Log('WebView2 Runtime found: ' + WebView2Version);
-
  NeedsVCRuntime := not VCRuntimeIsInstalled;
  { 有版本号却没通过判定，就是装了但太旧，提示里要和「没装」分开说。}
  VCRuntimeVersion := ReadVCRuntimeVersion;
@@ -343,45 +304,30 @@ begin
  else
    Log('Visual C++ runtime found: ' + VCRuntimeVersion);

-  if not (NeedsWebView2 or NeedsVCRuntime) then
+  if not NeedsVCRuntime then
    exit;

-  Prompt := '这台电脑缺少输入法用到的系统组件，或版本过旧：' + #13#10;
-  if NeedsVCRuntime then
-  begin
-    Prompt := Prompt + #13#10 +
-      '● Visual C++ 2015-2022 可再发行组件包（x64），需要 14.' +
-      IntToStr(VCRuntimeMinMinor) + ' 或更高版本' + #13#10;
-    if VCRuntimeVersion <> '' then
-      Prompt := Prompt +
-        '   当前已安装 ' + VCRuntimeVersion + '，版本过旧，设置页等程序会启动即闪退。' + #13#10
-    else
-      Prompt := Prompt +
-        '   缺少它输入法主程序根本无法启动（提示找不到 VCRUNTIME140.dll 之类）。' + #13#10;
+  Prompt := '这台电脑缺少输入法用到的系统组件，或版本过旧：' + #13#10 + #13#10 +
+    '● Visual C++ 2015-2022 可再发行组件包（x64），需要 14.' +
+    IntToStr(VCRuntimeMinMinor) + ' 或更高版本' + #13#10;
+  if VCRuntimeVersion <> '' then
    Prompt := Prompt +
-      '   直接下载：' + VCRuntimeDirectUrl + #13#10 +
-      '   说明页面：' + VCRuntimeDownloadUrl + #13#10;
-  end;
-  if NeedsWebView2 then
-    Prompt := Prompt + #13#10 +
-      '● Microsoft Edge WebView2 Runtime' + #13#10 +
-      '   缺少它设置页面打不开。默认的 D2D 候选窗不依赖它，打字不受影响；' + #13#10 +
-      '   选了 WebView2 渲染的候选窗会临时改用 D2D，装好后自动恢复。' + #13#10 +
-      '   直接下载：' + WebView2DirectUrl + #13#10 +
-      '   说明页面：' + WebView2DownloadUrl + #13#10;
-  Prompt := Prompt + #13#10 +
-    '点击「是」直接下载上述组件并结束本次安装，装好后重新运行本安装程序；' + #13#10 +
-    '点击「否」继续安装（装完仍需自行补齐上述组件，对应功能才能正常使用）。';
+      '   当前已安装 ' + VCRuntimeVersion + '，版本过旧，设置页等程序会启动即闪退。' + #13#10
+  else
+    Prompt := Prompt +
+      '   缺少它输入法主程序根本无法启动（提示找不到 VCRUNTIME140.dll 之类）。' + #13#10;
+  Prompt := Prompt +
+    '   直接下载：' + VCRuntimeDirectUrl + #13#10 +
+    '   说明页面：' + VCRuntimeDownloadUrl + #13#10 + #13#10 +
+    '点击「是」直接下载该组件并结束本次安装，装好后重新运行本安装程序；' + #13#10 +
+    '点击「否」继续安装（装完仍需自行补齐该组件，输入法才能正常使用）。';

  { 静默安装（CI、企业批量部署）不该被一个对话框卡住：默认继续，缺什么已经写进日志了。}
  if
    SuppressibleMsgBox(Prompt, mbConfirmation, MB_YESNO, IDNO) = IDYES
  then
  begin
-    if NeedsVCRuntime then
-      OpenDownloadPage(VCRuntimeDirectUrl);
-    if NeedsWebView2 then
-      OpenDownloadPage(WebView2DirectUrl);
+    OpenDownloadPage(VCRuntimeDirectUrl);
    Result := False;
  end;
 end;
@@ -642,7 +588,7 @@ end;
  升级时跳过：那时 config.toml 已经属于用户，安装器不该替他重新决定。}
 procedure InitializeWizard;
 begin
-  { 词库、用户配置、皮肤和前端资源都在这个目录下，整包有几百 MB，
+  { 词库、用户配置、皮肤和界面资源都在这个目录下，整包有几百 MB，
    所以要让用户能把它放到别的盘。程序本体仍然装在 Program Files：
    Server 带 uiAccess=true，只有装在受信任目录里这个标志才生效。}
  DataDirPage := CreateInputDirPage(
@@ -892,7 +838,7 @@ begin
    (CompareText(FileName, 'config.default.toml') = 0) or
    (CompareText(FileName, 'helpcodes') = 0) or
    (CompareText(FileName, 'radical') = 0) or
-    (CompareText(FileName, 'html') = 0);
+    (CompareText(FileName, 'assets') = 0);
 end;

 { Server、引擎和安装器自己运行时在数据目录根下写出来的条目（不含 IsPreservedAppDataItem 已列的）。}
@@ -919,14 +865,18 @@ begin
    (CompareText(FileName, 'logs') = 0);
 end;

-{ 数据目录不整个归我们时，只有这些名字允许删（#537）。html、logs 这种通用目录名
+{ 数据目录不整个归我们时，只有这些名字允许删（#537）。assets、html、logs 这种通用目录名
  由 DeleteKnownAppDataDir 只删输入法自己写进去的部分。log\、webview2\ 等只会出现在
  历史默认位置，那里整个目录归我们，不必列。}
 { 旧版随包装进数据目录根下、现已不再分发的条目。留在名单里，覆盖安装与卸载才会继续清掉它们。
-  神经整句效果档模型改为设置页按需下载到 models\neural-desktop\（归 IsCollocationModelDirectory 保留）。}
+  神经整句效果档模型改为设置页按需下载到 models\neural-desktop\（归 IsCollocationModelDirectory 保留）。
+  html\webview2\ 是旧版 WebView2 界面的页面，界面改由 Direct2D 绘制后不再分发；设置窗口
+  用到的图片改装在 assets\settings\。}
 function IsRetiredAppDataItem(const FileName: String): Boolean;
 begin
-  Result := CompareText(FileName, 'sentence-model-desktop.safetensors') = 0;
+  Result :=
+    (CompareText(FileName, 'sentence-model-desktop.safetensors') = 0) or
+    (CompareText(FileName, 'html') = 0);
 end;

 function IsKnownAppDataItem(const FileName: String): Boolean;
@@ -994,7 +944,7 @@ var
  SettingsWindow: HWND;
  WaitedMs: Integer;
 begin
-  // 设置窗口关闭后只是隐藏，进程还要驻留十分钟保住已导航完的 WebView2。
+  // 设置窗口关闭后可能只是隐藏，进程按 appearance.settings_window_linger 继续驻留。
  // 覆盖安装要删掉整个 server 目录，所以这里必须把它请走：先投 kQuitSettings
  // 让它自己收尾（Server 已被强杀，没人替我们发这条消息了），再强杀兜底。
  SettingsWindow := FindWindowByClassName('{#MySettingsWindowClass}');
@@ -1072,34 +1022,6 @@ begin
  );
 end;

-procedure EnsureSharedWebView2DataDir;
-var
-  RootPath: String;
-  ResultCode: Integer;
-begin
-  { Edge 子进程需要 Users 可写、中完整性的目录。安装器本身是高完整性，
-    只 CreateDir 会带上高完整性标签，所以还要降完整性。 }
-  RootPath := ExpandConstant('{commonappdata}\metasequoiaime');
-  ForceDirectories(RootPath + '\webview2');
-  ForceDirectories(RootPath + '\webview2-settings');
-  Exec(
-    ExpandConstant('{sys}\icacls.exe'),
-    '"' + RootPath + '" /grant *S-1-5-32-545:(OI)(CI)M /T /C /Q',
-    '',
-    SW_HIDE,
-    ewWaitUntilTerminated,
-    ResultCode
-  );
-  Exec(
-    ExpandConstant('{sys}\icacls.exe'),
-    '"' + RootPath + '" /setintegritylevel (OI)(CI)M /T /C /Q',
-    '',
-    SW_HIDE,
-    ewWaitUntilTerminated,
-    ResultCode
-  );
-end;
-
 procedure CreateWatchdogLogonTask;
 var
  WatchdogPath: String;
@@ -1137,7 +1059,7 @@ begin
 end;

 { 不独占的数据目录里删一个名单上的子目录。名字通用的几个只删我们写进去的内容，
-  目录空了才删掉它：用户自己恰好也有一个 html、logs 或 skins 文件夹时不能跟着没了。
+  目录空了才删掉它：用户自己恰好也有一个 assets、html、logs 或 skins 文件夹时不能跟着没了。
  skins 里分不清哪些是外部皮肤、哪些是别人的东西，宁可留下。}
 procedure DeleteKnownAppDataDir(const ItemPath, FileName: String);
 begin
@@ -1145,7 +1067,10 @@ begin
  begin
    { 只删空目录。}
  end
+  else if CompareText(FileName, 'assets') = 0 then
+    TryDeleteTree(AddBackslash(ItemPath) + 'settings')
  else if CompareText(FileName, 'html') = 0 then
+    { 旧版的 WebView2 页面，见 IsRetiredAppDataItem。}
    TryDeleteTree(AddBackslash(ItemPath) + 'webview2')
  else if CompareText(FileName, 'logs') = 0 then
  begin
@@ -1204,6 +1129,33 @@ begin
  RemoveDir(Directory);
 end;

+{ 旧版 WebView2 的用户数据（浏览器缓存、Cookie 等）。界面改由 Direct2D 绘制后不再有人
+  读写它们，覆盖安装和卸载都清掉。正常情况下在 ProgramData 下；那里不可写时旧版 Server
+  退到历史默认数据目录下的同名子目录，那个目录整个归我们，按名字删是安全的。}
+procedure RemoveLegacyWebView2UserData;
+begin
+  TryDeleteTree(ExpandConstant('{commonappdata}\metasequoiaime\webview2'));
+  TryDeleteTree(ExpandConstant('{commonappdata}\metasequoiaime\webview2-settings'));
+  RemoveDir(ExpandConstant('{commonappdata}\metasequoiaime'));
+  TryDeleteTree(ExpandConstant('{localappdata}\metasequoiaime\webview2'));
+  TryDeleteTree(ExpandConstant('{localappdata}\metasequoiaime\webview2-settings'));
+end;
+
+#ifdef LightPackage
+{ 轻量包只替换数据目录里的个别子目录。整个目录归我们时整个删；只有旧版标记时（#537）
+  按 DeleteKnownAppDataDir 的规则只删输入法自己写进去的部分。}
+procedure CleanLightPackageItem(const FileName: String);
+var
+  AppDataPath: String;
+begin
+  AppDataPath := GetDataDir('');
+  if OwnsDataDirExclusively(AppDataPath) then
+    TryDeleteTree(AddBackslash(AppDataPath) + FileName)
+  else if DataDirHasMarker(AppDataPath) then
+    DeleteKnownAppDataDir(AddBackslash(AppDataPath) + FileName, FileName);
+end;
+#endif
+
 { helpcodes 里的内置表由本次安装重写，custom 子目录是用户自己放的辅助码，升级不得清掉。}
 procedure CleanHelpcodesExceptCustom(const HelpcodesPath: String);
 var
@@ -1394,7 +1346,7 @@ begin
 end;

 { 用户改了数据目录：把上一处的用户数据搬过来。只搬真正属于用户、装不回来的东西——
-  词库主体、前端资源和辅助码都会由本次安装重新写入新目录。
+  词库主体、界面资源和辅助码都会由本次安装重新写入新目录。
  用 robocopy 而不是 RenameFile：跨盘移动目录时 MoveFile 会直接失败。}
 function MigrateUserDataDir(const OldDir, NewDir: String): String;
 var
@@ -1494,7 +1446,7 @@ begin
    exit;
  end;

-  { 旧目录里剩下的是可重建的资源（词库、html、cache 等）。}
+  { 旧目录里剩下的是可重建的资源（词库、界面资源、cache 等）。}
  RemoveDataDir(OldDir);
 end;

@@ -1658,8 +1610,10 @@ begin
  { 轻量包不清根目录，但新 Server 同样只认 models\neural-desktop\，所以两种包都要挪。}
  AdoptRetiredDesktopModel('0a6ecba69bf1d39c7eb49549c716477dd6c03fdf05757773e1f50435262fb469');
 #ifdef LightPackage
-  { 轻量包不替换词库：只清 HTML 和 Server/TSF，保留本机 msime.db 等。}
-  TryDeleteTree(AddBackslash(GetDataDir('')) + 'html');
+  { 轻量包不替换词库：只清设置窗口图片资源和 Server/TSF，保留本机 msime.db 等。
+    旧版留下的 html（WebView2 页面）也一并清掉。}
+  CleanLightPackageItem('assets');
+  CleanLightPackageItem('html');
 #else
  { 不能让旧 WAL/SHM 与即将复制的新主数据库混用。}
  if not RemoveOldTargetDatabaseFiles(FailedPath) then
@@ -1669,13 +1623,10 @@ begin
      '它可能仍被输入法相关进程占用。请关闭相关程序后重试安装。';
    exit;
  end;
-  { 目标词库已安全移除，再清理旧前端资源与 WebView2 用户数据。
-    用户配置和外部皮肤目录在这里保留；webview2 目录故意重建，
-    由 Server 冷启动路径保证 FTB/候选窗仍能稳定揭罩。}
+  { 目标词库已安全移除，再清理旧的随包资源。用户配置和外部皮肤目录在这里保留。}
  CleanAppDataExceptUserFiles;
 #endif
-  TryDeleteTree(ExpandConstant('{commonappdata}\metasequoiaime\webview2'));
-  TryDeleteTree(ExpandConstant('{commonappdata}\metasequoiaime\webview2-settings'));
+  RemoveLegacyWebView2UserData;
  TryDeleteTree(ExpandConstant(
    '{commonpf64}\metasequoiaime\server'));
  TryDeleteOldVersionDirs(TsfRoot32);
@@ -1703,7 +1654,6 @@ begin
 #endif
    CreateWatchdogLogonTask;
    EnsureImeUserDataDir;
-    EnsureSharedWebView2DataDir;
    { Keep the old autostart intact until its scheduled-task replacement has
      been created successfully, then remove the Explorer-delayed Run entry. }
    RegDeleteValue(
@@ -1759,6 +1709,10 @@ begin
    TryDeleteTree(ExpandConstant('{commonpf64}\metasequoiaime'));
    { 数据目录可能被用户指到了别的盘，甚至指到一个本来就有文件的文件夹（#537）。}
    RemoveDataDir(ResolvePreviousDataDir);
+    { 旧版 WebView2 的用户数据，见 RemoveLegacyWebView2UserData。}
+    RemoveLegacyWebView2UserData;
+    { 数据目录在别处时，历史默认位置里可能只剩上面删掉的那两样；还有别的东西就删不掉，原样留着。}
+    RemoveDir(ExpandConstant('{localappdata}\metasequoiaime'));
    TryDeleteTree(ExpandConstant('{commonappdata}\metasequoiaime'));
  end;
 end;
@@ -1,4 +1,4 @@
-# Build a light (hotfix) installer that only replaces TSF, Server and HTML, then sign its payload
+# Build a light (hotfix) installer that only replaces TSF, Server and the settings window assets, then sign its payload
 # and the finished installer with the real Certum certificate exposed by SimplySign Desktop.
 #
 # The light installer carries no dictionaries, neural models or factory config template, so it is
@@ -21,7 +21,7 @@ param(
    # so this local entry keeps them opt-in, like test-symbols.ps1.
    [switch]$IncludeSymbols,

-    # Hotfix package: only TSF, Server and HTML, like test-light.ps1. It carries no dictionaries,
+    # Hotfix package: only TSF, Server and the settings window assets, like test-light.ps1. It carries no dictionaries,
    # neural models or factory config template, so it is only valid on top of a full install whose
    # data files still match this build.
    [switch]$Light,
@@ -217,8 +217,7 @@ Write-Host "时间戳服务：$TimestampUrl"
 $repoRoot = Split-Path -Parent $PSScriptRoot
 $tsfCompile = Join-Path $repoRoot 'windows\scripts\lcompile-release-both.ps1'
 $serverCompile = Join-Path $repoRoot 'server\scripts\lcompile-release.ps1'
-$settingsDir = Join-Path $repoRoot 'ui-html\webview2\settings\ime-settings'
-foreach ($required in @($tsfCompile, $serverCompile, (Join-Path $settingsDir 'package.json'))) {
+foreach ($required in @($tsfCompile, $serverCompile)) {
    if (-not (Test-Path -LiteralPath $required -PathType Leaf)) {
        throw "缺少组件构建入口：$required"
    }
@@ -249,13 +248,6 @@ try {
    Push-Location (Join-Path $repoRoot 'server')
    try { & $serverCompile -Reconfigure:$Reconfigure } finally { Pop-Location }

-    Push-Location $settingsDir
-    try {
-        pnpm run build
-        if ($LASTEXITCODE -ne 0) { throw "Settings page build failed ($LASTEXITCODE)" }
-    }
-    finally { Pop-Location }
-
    # 完整包的数据输入和 Invoke-LocalTest.ps1 一样准备：词库从本仓同级的 msime-dictionary 构建，
    # 不下载 Release；源数据提交和构建脚本都没变、工作区干净时直接跳过。不跑这一步，
    # Prepare-PackageFiles 只会原样拿 MetasequoiaImeDict\out\ 里上次留下的东西。
@@ -275,7 +267,6 @@ try {
        -RepoRoot $repoRoot `
        -TsfDirectory windows `
        -ServerDirectory server `
-        -UiHtmlDirectory ui-html `
        -NoticesDirectory . `
        -HelpCodeDirectory engine/helpcode

@@ -1,6 +1,6 @@
-# 轻量本地测试：只编译 TSF / Server / 设置页，收集这三块产物，打不含词库的安装包。
+# 轻量本地测试：只编译 TSF / Server，收集它们的产物和设置窗口图片资源，打不含词库的安装包。
 #
-# 适用：只改了 TSF、Server 或 HTML，本机已有完整安装（词库已在
+# 适用：只改了 TSF 或 Server，本机已有完整安装（词库已在
 # %LOCALAPPDATA%\metasequoiaime）。不要用这个脚本做首次安装。
 #
 # 完整流程（含词库）仍用 .\test.ps1；需要包内带 PDB 时用 .\test-symbols.ps1。
@@ -11,7 +11,7 @@

 [CmdletBinding()]
 param(
-    # 默认走轻量包，和日常改 TSF / Server / HTML 的节奏一致；要连词库一起装就加 -Full。
+    # 默认走轻量包，和日常改 TSF / Server 的节奏一致；要连词库一起装就加 -Full。
    [switch]$Full,
    [switch]$Reconfigure
 )
@@ -2,7 +2,7 @@
 # 本机自签名 → Inno Setup 打包 → 签安装包 → 启动安装程序。
 #
 # 不使用任何预置证书。签名脚本会在本机生成并复用自签名测试证书。
-# 只改 TSF / Server / HTML、且本机已有词库时，用 .\test-light.ps1。
+# 只改 TSF / Server、且本机已有词库时，用 .\test-light.ps1。
 # 需要包内带 PDB 时用 .\test-symbols.ps1 -Full。
 #
 # 编译是增量的，实现见 Invoke-LocalTest.ps1。
@@ -70,34 +70,25 @@ try {
        throw 'CI manifest embedding did not verify resource 1'
    }
    Remove-Item Function:/cmake
-    # Each installer entry must stop before staging/signing when the settings build fails.
-    foreach ($relative in @('windows/scripts/lcompile-release-both.ps1', 'server/scripts/lcompile-release.ps1')) {
-        [IO.File]::WriteAllText((Join-Path $fixture $relative), '# successful synthetic component build')
-    }
-    $settings = Join-Path $fixture 'ui-html/webview2/settings/ime-settings'
-    New-Item -ItemType Directory -Force $settings | Out-Null
-    [IO.File]::WriteAllText((Join-Path $settings 'package.json'), '{}')
+    # Each installer entry must stop before staging/signing when the Server build fails.
+    [IO.File]::WriteAllText((Join-Path $fixture 'windows/scripts/lcompile-release-both.ps1'), '# successful synthetic component build')
+    [IO.File]::WriteAllText((Join-Path $fixture 'server/scripts/lcompile-release.ps1'), "throw 'Server build failed (23)'")
    $installer = Join-Path $fixture 'installer'
    New-Item -ItemType Directory -Force $installer | Out-Null
    [IO.File]::WriteAllText((Join-Path $installer 'Prepare-PackageFiles.ps1'), "throw 'Reached package staging after failure'")
-    function global:pnpm {
-        # 只让 'pnpm run build' 失败，允许 'pnpm install' 成功（用于首次依赖安装）
-        if ($args -contains 'build') { $global:LASTEXITCODE = 23 }
-        else { $global:LASTEXITCODE = 0 }
-    }
    Copy-Item (Join-Path $source 'installer/Invoke-LocalTest.ps1') $installer
    foreach ($entry in @('test.ps1', 'test-light.ps1', 'test-symbols.ps1')) {
        Copy-Item (Join-Path $source "installer/$entry") $installer
        $rejected = $false
        try { & (Join-Path $installer $entry) }
-        catch { $rejected = $_.Exception.Message -eq 'Settings page build failed (23)' }
-        if (-not $rejected) { throw "$entry continued after the settings build failed" }
+        catch { $rejected = $_.Exception.Message -eq 'Server build failed (23)' }
+        if (-not $rejected) { throw "$entry continued after the Server build failed" }
    }
    $global:LASTEXITCODE = 0
    Write-Host 'Configure/build failures stop local packaging before staging, signing or installation'
 } finally {
    Set-Location $originalLocation
-    Remove-Item Function:/cmake, Function:/pnpm, Function:/Invoke-MsimeManifestProbe -ErrorAction SilentlyContinue
+    Remove-Item Function:/cmake, Function:/Invoke-MsimeManifestProbe -ErrorAction SilentlyContinue
    Remove-Variable MsimeBuildCalls, MsimeFailAt, MsimeManifestExit, MsimeManifestArguments -Scope Global -ErrorAction SilentlyContinue
    if (Test-Path $fixture) { Remove-Item $fixture -Recurse -Force }
 }
@@ -42,11 +42,8 @@ try {
        'neural-model/sentence-model-desktop.safetensors',
        'neural-model/sentence-model.safetensors',
        'neural-model/NOTICE.md',
-        'ui-html/webview2/shared/runtime.js',
-        'ui-html/webview2/candwnd/index.html',
-        'ui-html/webview2/menu/index.html',
-        'ui-html/webview2/ftb/index.html',
-        'ui-html/webview2/settings/ime-settings/dist/index.html',
+        'server/assets/settings/arrow.svg',
+        'server/assets/settings/sidebar/about.svg',
        'skins/default/fluent/skin.toml'
    )) { Write-Fixture $file }
    Write-Fixture 'skins/demo-skin/skin.toml' "schema_version = 1`nid = `"demo-skin`"`n"
@@ -58,7 +55,8 @@ try {
    python -c "import sqlite3,sys; sqlite3.connect(sys.argv[1]).execute('CREATE TABLE english_words(word TEXT,display TEXT,weight INTEGER,PRIMARY KEY(word,display))')" $english
    if ($LASTEXITCODE -ne 0) { throw 'Failed to create packaging fixture' }
    & (Join-Path $installer 'Prepare-PackageFiles.ps1') -RepoRoot $fixture -TargetVersion '2026.9.1' -IncludeSymbols
-    foreach ($file in @('app_data/html/webview2/shared/runtime.js', 'app_data/dictionary-manifest.json',
+    foreach ($file in @('app_data/assets/settings/arrow.svg', 'app_data/assets/settings/sidebar/about.svg',
+                         'app_data/dictionary-manifest.json',
                         'app_data/sc.lm', 'app_data/libime-lm-NOTICE.md', 'app_data/dict_pinyin.dat',
                         'app_data/sentence-model.safetensors', 'app_data/chinese-ime-lm-NOTICE.md',
                         'tsf_dll/32/MetasequoiaImeTsf.dll', 'tsf_dll/32/MetasequoiaImeTsf.pdb',
@@ -147,7 +145,7 @@ try {
    }
    # 默认不带符号：PDB 是安装包体积和打包耗时的大头，只有显式 -IncludeSymbols 才进包。
    & (Join-Path $installer 'Prepare-PackageFiles.ps1') -RepoRoot $fixture -TargetVersion '2026.9.1'
-    foreach ($file in @('app_data/html/webview2/shared/runtime.js',
+    foreach ($file in @('app_data/assets/settings/sidebar/about.svg',
                         'tsf_dll/32/MetasequoiaImeTsf.dll', 'tsf_dll/64/MetasequoiaImeTsf.dll',
                         'server_exe/MetasequoiaImeServer.exe')) {
        if (-not (Test-Path (Join-Path $installer $file))) { throw "Missing packaged file: $file" }
@@ -167,14 +165,19 @@ try {
    [IO.File]::WriteAllText($serverPdbFixture, 'fixture')
    $database = Join-Path $installer 'app_data/msime.db'
    [IO.File]::WriteAllText($database, 'preserved user data')
-    & (Join-Path $installer 'Prepare-PackageFiles.ps1') -RepoRoot $fixture -TsfDirectory windows -ServerDirectory server -UiHtmlDirectory ui-html -NoticesDirectory . -Light
+    # 轻量包不清空 app_data：旧版本留下的 html\（WebView2 页面）必须被清掉，否则会被打进包里。
+    $legacyHtml = Join-Path $installer 'app_data/html/webview2/shared/runtime.js'
+    New-Item -ItemType Directory -Force -Path (Split-Path $legacyHtml) | Out-Null
+    [IO.File]::WriteAllText($legacyHtml, 'stale')
+    & (Join-Path $installer 'Prepare-PackageFiles.ps1') -RepoRoot $fixture -TsfDirectory windows -ServerDirectory server -NoticesDirectory . -Light
    if ([IO.File]::ReadAllText($database) -ne 'preserved user data') { throw 'Light package replaced dictionary data' }
-    if (-not (Test-Path (Join-Path $installer 'app_data/html/webview2/shared/runtime.js'))) { throw 'Light package lost shared contracts' }
+    if (-not (Test-Path (Join-Path $installer 'app_data/assets/settings/sidebar/about.svg'))) { throw 'Light package lost settings assets' }
+    if (Test-Path (Join-Path $installer 'app_data/html')) { throw 'Light package kept the retired html directory' }
    # 完整包必须带 sc.lm。缺了它引擎是静默降级的：整句候选只是变差，不会报错，所以打包
    # 这一步是唯一能挡住它的地方。轻量包本来就不带数据文件，不受影响。
    $languageModelFixture = Join-Path $fixture 'language-model/sc.lm'
    Remove-Item $languageModelFixture -Force
-    & (Join-Path $installer 'Prepare-PackageFiles.ps1') -RepoRoot $fixture -TsfDirectory windows -ServerDirectory server -UiHtmlDirectory ui-html -NoticesDirectory . -Light
+    & (Join-Path $installer 'Prepare-PackageFiles.ps1') -RepoRoot $fixture -TsfDirectory windows -ServerDirectory server -NoticesDirectory . -Light
    $rejected = $false
    try { & (Join-Path $installer 'Prepare-PackageFiles.ps1') -RepoRoot $fixture } catch { $rejected = $_.Exception.Message -match 'sc\.lm' }
    if (-not $rejected) { throw 'Missing language model was accepted' }
@@ -195,10 +198,10 @@ try {
    try { & (Join-Path $installer 'Prepare-PackageFiles.ps1') -RepoRoot $fixture } catch { $rejected = $_.Exception.Message -match 'safetensors' }
    if (-not $rejected) { throw 'Missing neural sentence model was accepted' }
    [IO.File]::WriteAllText($neuralModelFixture, 'fixture')
-    Remove-Item (Join-Path $fixture 'ui-html/webview2/shared') -Recurse -Force
+    Remove-Item (Join-Path $fixture 'server/assets/settings') -Recurse -Force
    $rejected = $false
-    try { & (Join-Path $installer 'Prepare-PackageFiles.ps1') -RepoRoot $fixture -TsfDirectory windows -ServerDirectory server -UiHtmlDirectory ui-html -NoticesDirectory . } catch { $rejected = $true }
-    if (-not $rejected) { throw 'Missing shared contracts were accepted' }
+    try { & (Join-Path $installer 'Prepare-PackageFiles.ps1') -RepoRoot $fixture -TsfDirectory windows -ServerDirectory server -NoticesDirectory . } catch { $rejected = $_.Exception.Message -match '设置窗口图片资源' }
+    if (-not $rejected) { throw 'Missing settings assets were accepted' }
    if ([IO.File]::ReadAllText($database) -ne 'preserved user data') { throw 'Rejected package damaged previous staging' }
    Write-Host 'Full/light package contracts, provenance, exclusions and failure staging passed'
 } finally {
@@ -13,32 +13,20 @@ project_root_path = os.path.dirname(cur_file_path)

 user_home = os.path.expanduser("~")

-Win32WebviewTemplate_root_path = normpath(project_root_path)
-Win32WebviewTemplate_src_path = normpath(
-    os.path.join(Win32WebviewTemplate_root_path, "src")
+MetasequoiaImeLog_root_path = normpath(project_root_path)
+MetasequoiaImeLog_src_path = normpath(
+    os.path.join(MetasequoiaImeLog_root_path, "src")
 )
 vcpkg_include_path = normpath(
    os.path.join(
-        Win32WebviewTemplate_root_path,
+        MetasequoiaImeLog_root_path,
        "build",
        "vcpkg_installed",
        "x64-windows",
        "include",
    )
 )
-utfcpp_path = normpath(os.path.join(Win32WebviewTemplate_root_path, "utfcpp", "source"))
-webview2_path = normpath(
-    os.path.join(
-        user_home,
-        ".nuget",
-        "packages",
-        "microsoft.web.webview2",
-        "1.0.3240.44",
-        "build",
-        "native",
-        "include",
-    )
-)
+utfcpp_path = normpath(os.path.join(MetasequoiaImeLog_root_path, "utfcpp", "source"))
 wim_path = normpath(
    os.path.join(
        user_home,
@@ -66,17 +54,16 @@ cmake_toolchain_file_path = normpath(

 #
 # project_root/.clangd
-# line 7, 8, 9, 10
+# line 7, 8, 10
 #
 dot_clangd_file = os.path.join(
-    Win32WebviewTemplate_root_path, "scripts", "config_files", ".clangd"
+    MetasequoiaImeLog_root_path, "scripts", "config_files", ".clangd"
 )
-dot_clangd_output_file = os.path.join(Win32WebviewTemplate_root_path, ".clangd")
+dot_clangd_output_file = os.path.join(MetasequoiaImeLog_root_path, ".clangd")
 with open(dot_clangd_file, "r", encoding="utf-8") as f:
    lines = f.readlines()
-lines[6] = f'      "-I{Win32WebviewTemplate_src_path}",\n'
+lines[6] = f'      "-I{MetasequoiaImeLog_src_path}",\n'
 lines[7] = f'      "-I{vcpkg_include_path}",\n'
-lines[8] = f'      "-I{webview2_path}",\n'
 lines[9] = f'      "-I{wim_path}",\n'
 with open(dot_clangd_output_file, "w", encoding="utf-8") as f:
    f.writelines(lines)
@@ -85,9 +72,9 @@ with open(dot_clangd_output_file, "w", encoding="utf-8") as f:
 # project_root/CMakeLists.txt
 #
 CMakeLists_file = os.path.join(
-    Win32WebviewTemplate_root_path, "scripts", "config_files", "CMakeLists.txt"
+    MetasequoiaImeLog_root_path, "scripts", "config_files", "CMakeLists.txt"
 )
-CMakeLists_output_file = os.path.join(Win32WebviewTemplate_root_path, "CMakeLists.txt")
+CMakeLists_output_file = os.path.join(MetasequoiaImeLog_root_path, "CMakeLists.txt")
 with open(CMakeLists_file, "r", encoding="utf-8") as f:
    lines = f.readlines()
 with open(CMakeLists_output_file, "w", encoding="utf-8") as f:
@@ -98,10 +85,10 @@ with open(CMakeLists_output_file, "w", encoding="utf-8") as f:
 # lines 9 12
 #
 CMakePresets_file = os.path.join(
-    Win32WebviewTemplate_root_path, "scripts", "config_files", "CMakePresets.json"
+    MetasequoiaImeLog_root_path, "scripts", "config_files", "CMakePresets.json"
 )
 CMakePresets_file_output_file = os.path.join(
-    Win32WebviewTemplate_root_path, "CMakePresets.json"
+    MetasequoiaImeLog_root_path, "CMakePresets.json"
 )
 with open(CMakePresets_file, "r", encoding="utf-8") as f:
    lines = f.readlines()
@@ -2,13 +2,13 @@

 组织级约定见 [组织 AGENTS.md](https://github.com/metasequoiaime/.github/blob/main/AGENTS.md)，仓库地图和组件之间的边界见[仓库根 AGENTS.md](../AGENTS.md)。本文件补充本组件的实现、数据和验证规则，路径都相对于 `server/`。

-本组件是常驻后端进程：输入引擎与候选状态、配置、词典、Named Pipe 服务，以及候选窗、悬浮工具栏、托盘菜单的原生宿主与 WebView2 控制器。设置页（`MetasequoiaImeSettings.exe`）由本组件的 `server/src/settings/` 单独构成一个进程，不在服务端进程内。
+本组件是常驻后端进程：输入引擎与候选状态、配置、词典、Named Pipe 服务，以及候选窗、悬浮工具栏、托盘菜单（`msimeui` Direct2D presenter）。设置窗口（`MetasequoiaImeSettings.exe`）由本组件的 `server/src/settings/` 单独构成一个进程，不在服务端进程内。

 ## vcpkg_installed 的解析

-`CMakeLists.txt` 四处引用 `vcpkg_installed`，全部走 `${CMAKE_BINARY_DIR}`。其中 `WEBVIEW2_VCPKG_ROOT` 供 WebView2 loader 的导入库和运行时 DLL 拷贝使用。
+`CMakeLists.txt` 引用 `vcpkg_installed` 的地方（头文件目录、`sqlite3.dll` 拷贝）全部走 `${CMAKE_BINARY_DIR}`。

-**不要改回 `${CMAKE_SOURCE_DIR}/build/...`。** 那样 binary dir 就只能叫字面的 `build`，本仓自带的 `vcpkg-release` preset（`binaryDir` 是 `build-release`）和 `scripts/lcompile-release.ps1` 都会在链接 `MetasequoiaImeSettings` 时报 LNK1181 找不到 `WebView2Loader.dll.lib`。
+**不要改回 `${CMAKE_SOURCE_DIR}/build/...`。** 那样 binary dir 就只能叫字面的 `build`，本仓自带的 `vcpkg-release` preset（`binaryDir` 是 `build-release`）和 `scripts/lcompile-release.ps1` 都会找不到 vcpkg 装好的头文件与运行时 DLL。

 CI 刻意构建到 `build-release` 而不是 `build`，为的就是让这条不会悄悄退回去——两者在目录名恰好是 `build` 时解析结果相同，所以只有构建到别处才测得出来。

@@ -43,9 +43,9 @@ ctest --test-dir build-release -C Release --output-on-failure

 进程在 `src/main.cpp:90` 设 `DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2`。

-**创建 HWND 时不能直接带 `WS_EX_TOPMOST`。** 在 `uiAccess=true` 进程里，Topmost 父窗口会让 WebView2 的跨进程 `SetParent` 返回 `E_INVALIDARG`，或者形成「窗口存在、尺寸正确但永远空白」。现有顺序是：非 Topmost 建窗 → DWM cloak 下预热 → 三个共享 environment 的 controller 依次创建并完成首屏导航 → lazy-topmost gate 打开 → 分阶段提升到 `HWND_TOPMOST`。提升后要用 `RenotifyControllerAfterPin` 重新同步 bounds 和 parent position。不要在布局函数里随手传 `HWND_TOPMOST`，也不要绕过 `EnsureSmallWindowsTopmost` / lazy pin。
+三个小窗口的置顶由 `src/window/small_windows.cpp` 统一管理：建窗时不带 `WS_EX_TOPMOST`，以 DWM cloak 状态显示在真实显示器上；第一次真正显示时 `EnsureSmallWindowsTopmost` 打开置顶门，候选窗、悬浮工具栏、托盘菜单按固定间隔依次提升到 `HWND_TOPMOST`，托盘菜单最后（同一置顶带里后置顶的在上面）。这个分阶段顺序沿用自已移除的 WebView2 时期，D2D 窗口一直按它发布；要改成一次性置顶，先在签名并安装到受信位置的构建上验证 `uiAccess` 下的表现。不要在布局函数里随手传 `HWND_TOPMOST` 绕过这道门；托盘菜单需要回到最上面时用 `RaiseTrayMenuAboveSmallWindows`。

-隐藏尚未完成首帧的 WebView2 host 会阻断 raster 初始化，预热阶段用 cloak，之后才按配置显示或隐藏。
+隐藏候选窗用 cloak 而不是 `SW_HIDE`，presenter 在下一次显示时解除 cloak；悬浮工具栏在 presenter 绑定失败时只 cloak 不 hide。

 ## Boost

@@ -59,39 +59,34 @@ Boost 是静态链接但没有写进 `vcpkg.json`，所以只能用 classic 模

 `CMakeLists.txt` 和 `tests/CMakeLists.txt` 不再由脚本生成，直接改就行。这两个文件曾经也是从 `scripts/config_files/` 覆盖过来的，但模板早已落后到 147 行对 400 行、以及一个无关的通用 `WinCppTemplate`，跑一次脚本就会毁掉构建，因此模板已删除。

-`.clangd` 模板用 `@NAME@` 占位符，不再按固定行号替换——旧的行号索引已经漂移过一次，把 Boost 路径写到了 WebView2 的 include 上。新增 include 时在模板里加占位符、并在脚本的 `clangd_substitutions` 里补上对应项即可；有占位符没被替换脚本会直接报错。
+`.clangd` 模板用 `@NAME@` 占位符，不再按固定行号替换——旧的行号索引已经漂移过一次，把 Boost 路径写到了别的 include 上。新增 include 时在模板里加占位符、并在脚本的 `clangd_substitutions` 里补上对应项即可；有占位符没被替换脚本会直接报错。

 ## 提交

 提交信息用 `type(scope): 摘要`。不要添加 `Co-Authored-By`、`Generated with` 或其他 AI 生成标记。

-## 窗口与页面的维护边界
+## 窗口与设置窗口的维护边界

- **Server 拥有窗口，UiHtml 拥有页面**：候选窗、悬浮工具栏和托盘菜单的 HWND、尺寸、位置、显示、
-  DPI、Z-order、WebView2 environment/controller 生命周期在 `server/src/window/` 与
-  `server/src/webview2/`；页面结构、样式和浏览器端交互在 `ui-html/webview2/`。
- 消息定义以 Engine `contracts/webview/` 为准，双方必须校验。C++ → 页面更新主要经 WebView2 导航/脚本执行，页面 → C++ 动作经
-  `window.chrome.webview.postMessage(...)`。修改消息 `type`、JSON 字段、页面导出的 JS 函数或 DOM
-  标识时，必须同步检查 Server 的消息解析/脚本拼接与 UiHtml 的发送/接收代码。
- 候选内容和输入状态的权威仍在 Server/引擎，网页只负责展示与发出用户动作；不要在网页侧复制
+- **界面只有 Direct2D 一套**：候选窗、悬浮工具栏和托盘菜单的 HWND、尺寸、位置、显示、DPI、Z-order 在
+  `src/window/`（`ime_windows*.cpp` 是宿主窗口过程，`*_presenter.cpp` 用 `msimeui` 绘制）。WebView2
+  已整体移除，`appearance.ui_backend` / `appearance.settings_ui_backend` 两个键也随之删除，不要恢复。
+- 候选内容和输入状态的权威仍在 Server/引擎，presenter 只负责展示与发出用户动作；不要在界面侧复制
  候选选择、翻页、输入模式或配置持久化的核心状态机。
- 设置页前端位于 `ui-html/webview2/settings/ime-settings/`，其中包含 Vite/TypeScript
-  工程；设置窗口的原生创建、激活、WebView2 承载及与配置系统的桥接都在本组件的独立进程
-  `MetasequoiaImeSettings.exe`（`server/src/settings/`）里，服务端进程内没有内嵌的设置宿主。
- 设置窗口另有实验性的 Direct2D 前端（`appearance.settings_ui_backend = "d2d"`，或命令行
-  `--d2d`），在 `server/src/settings/native/`，用 msimeui 1:1 复刻上面的网页。它和网页走同一套
-  webview 契约消息与 `HandleClientMessage`，配置读写映射仍只在 `settings_app.cpp`。**改设置页
-  的结构、文案或行为时两个前端要一起改**：每个 `native_page_*.cpp` 对应一个 partial + module。
+- 设置窗口是独立进程 `MetasequoiaImeSettings.exe`（`src/settings/`）：原生创建、激活、驻留和配置
+  读写映射在 `settings_app.cpp`，界面在 `src/settings/native/`，图片资源在 `assets/settings/`（安装到
+  数据目录的 `assets\settings\`）。界面与宿主之间走 `../engine/contracts/webview/` 的消息契约：宿主推送
+  `configSnapshot` 与各类响应，界面发 `configUpdate` 与请求，统一进 `HandleClientMessage` 校验和分发，
+  配置读写映射只在 `settings_app.cpp`。每个 `native_page_*.cpp` 顶部注明了它当初移植自旧网页设置页的
+  哪个 partial / module，那些文件只在 git 历史里（`ui-html/webview2/settings/ime-settings/src/`）。
  本地调试时可设 `METASEQUOIA_IME_SETTINGS_INSTANCE=<任意名>` 让开发版与已安装的设置窗口并存，
-  并用 `METASEQUOIA_IME_CONFIG_DIR` 隔离配置。
+  并用 `METASEQUOIA_IME_CONFIG_DIR` 隔离配置。旧快捷方式传来的 `--d2d` / `--webview2` 参数会被忽略。

 ### 尺寸、坐标与 DPI

 - **所有涉及尺寸或坐标的代码都必须明确考虑 DPI**。新增或修改窗口大小、位置、边距、间距、字体、
-  图标、命中区域、WebView2 bounds、候选布局及屏幕边界计算时，不得默认固定像素在所有显示器上等价。
+  图标、命中区域、候选布局及屏幕边界计算时，不得默认固定像素在所有显示器上等价。
 - 明确每个数值使用逻辑单位还是物理像素，并在正确的窗口/显示器 DPI 下统一换算；不要混用来自不同
  DPI 空间的坐标和尺寸，也不要长期缓存可能在窗口跨屏或 DPI 变化后失效的换算结果。
- 原生窗口需处理运行时 DPI 变化（包括跨显示器移动），同步更新窗口、子窗口、WebView2 controller
-  和相关布局；优先沿用项目已有的 DPI 获取与缩放辅助函数，避免各处自行实现不一致的换算规则。
+- 原生窗口需处理运行时 DPI 变化（包括跨显示器移动），同步更新窗口、子窗口和相关布局；优先沿用项目已有的 DPI 获取与缩放辅助函数，避免各处自行实现不一致的换算规则。
 - 涉及尺寸或布局的改动，至少检查 100%、125%、150%、200% 缩放，以及不同 DPI 显示器之间移动时
  是否出现裁切、错位、模糊、点击区域偏移或窗口越出工作区。
@@ -264,18 +264,8 @@ set(SRC_FILES
    "./src/utils/serial_task_runner.h"
    "./src/utils/shuangpin_preedit_display.cpp"
    "./src/utils/shuangpin_preedit_display.h"
-    "./src/utils/webview_utils.cpp"
-    "./src/utils/webview_utils.h"
    "./src/utils/window_utils.cpp"
    "./src/utils/window_utils.h"
-    "./src/webview2/windows_webview2.cpp"
-    "./src/webview2/windows_webview2_candidate.cpp"
-    "./src/webview2/windows_webview2_internal.h"
-    "./src/webview2/windows_webview2_menu.cpp"
-    "./src/webview2/windows_webview2_skin.cpp"
-    "./src/webview2/windows_webview2_toolbar.cpp"
-    "./src/webview2/skin_css_policy.cpp"
-    "./src/webview2/windows_webview2.h"
    "./src/window/candidate_presenter.cpp"
    "./src/window/candidate_presenter.h"
    "./src/window/candidate_skin_overlay.cpp"
@@ -293,11 +283,11 @@ set(SRC_FILES
    "./src/window/ime_windows.cpp"
    "./src/window/ime_windows.h"
    "./src/window/ime_windows_candidate.cpp"
-    "./src/window/ime_windows_candidate_layout.cpp"
-    "./src/window/ime_windows_candidate_show.cpp"
    "./src/window/ime_windows_internal.h"
    "./src/window/ime_windows_menu.cpp"
    "./src/window/ime_windows_toolbar.cpp"
+    "./src/window/small_windows.cpp"
+    "./src/window/small_windows.h"
    "./src/window/window_hook.cpp"
    "./src/window/window_hook.h"
    "./src/voice-input/voice_input_service.cpp"
@@ -322,7 +312,7 @@ add_executable(${MY_EXECUTABLE_NAME} WIN32
    ${SRC_FILES}
 )

-# Tomlplusplus, Webview2 and other head-only libraries
+# Tomlplusplus and other header-only libraries
 target_include_directories(${PROJECT_NAME}
    PRIVATE
    "${CMAKE_BINARY_DIR}/vcpkg_installed/x64-windows/include"
@@ -342,7 +332,7 @@ target_link_libraries(${PROJECT_NAME} PRIVATE ZLIB::ZLIB)
 target_link_libraries(${PROJECT_NAME} PRIVATE d2d1 dwrite dwmapi shell32 shcore ole32 bcrypt)

 # The helper executables below already build at /W4. The server itself -- the process that owns
-# every network call, the WebView2 hosts and the skin loader -- was still at the default /W3.
+# every network call and the skin loader -- was still at the default /W3.
 if(MSVC)
    target_compile_options(${MY_EXECUTABLE_NAME} PRIVATE /W4)
 endif()
@@ -447,15 +437,6 @@ if(MSVC)
 endif()
 add_dependencies(${PROJECT_NAME} ${HANDWRITING_EXECUTABLE_NAME})

-# WebView2 loader (required for CreateCoreWebView2EnvironmentWithOptions)
-set(WEBVIEW2_VCPKG_ROOT "${CMAKE_BINARY_DIR}/vcpkg_installed/x64-windows")
-set(WEBVIEW2_LOADER_RELEASE "${WEBVIEW2_VCPKG_ROOT}/lib/WebView2Loader.dll.lib")
-set(WEBVIEW2_LOADER_DEBUG "${WEBVIEW2_VCPKG_ROOT}/debug/lib/WebView2Loader.dll.lib")
-target_link_libraries(${PROJECT_NAME} PRIVATE
-    $<$<CONFIG:Debug>:${WEBVIEW2_LOADER_DEBUG}>
-    $<$<CONFIG:Release>:${WEBVIEW2_LOADER_RELEASE}>
-)
-
 set(SETTINGS_EXECUTABLE_NAME "MetasequoiaImeSettings")
 add_executable(${SETTINGS_EXECUTABLE_NAME} WIN32
    "./src/settings/settings_app.cpp"
@@ -474,10 +455,6 @@ add_executable(${SETTINGS_EXECUTABLE_NAME} WIN32
    "./src/settings/default_input_method.h"
    "./src/settings/game_compat_name.cpp"
    "./src/settings/game_compat_name.h"
-    "./src/settings/settings_mouse_input.cpp"
-    "./src/settings/settings_mouse_input.h"
-    "./src/settings/settings_splash.cpp"
-    "./src/settings/settings_splash.h"
    "./src/settings/settings_launcher.cpp"
    "./src/settings/settings_launcher.h"
    "./src/settings/native/native_settings_bindings.cpp"
@@ -593,8 +570,6 @@ target_link_libraries(${SETTINGS_EXECUTABLE_NAME} PRIVATE
    d2d1
    dwrite
    shell32
-    $<$<CONFIG:Debug>:${WEBVIEW2_LOADER_DEBUG}>
-    $<$<CONFIG:Release>:${WEBVIEW2_LOADER_RELEASE}>
 )
 if(MSVC)
    target_compile_options(${SETTINGS_EXECUTABLE_NAME} PRIVATE /W4)
@@ -603,21 +578,13 @@ endif()
 # Building the server target alone must therefore also produce Settings.
 add_dependencies(${PROJECT_NAME} ${SETTINGS_EXECUTABLE_NAME})
 add_custom_command(TARGET ${SETTINGS_EXECUTABLE_NAME} POST_BUILD
-    COMMAND ${CMAKE_COMMAND} -E copy_if_different
-        $<$<CONFIG:Debug>:${WEBVIEW2_VCPKG_ROOT}/debug/bin/WebView2Loader.dll>
-        $<$<CONFIG:Release>:${WEBVIEW2_VCPKG_ROOT}/bin/WebView2Loader.dll>
-        $<TARGET_FILE_DIR:${SETTINGS_EXECUTABLE_NAME}>
    COMMAND ${CMAKE_COMMAND} -E copy_directory
        "${MSIME_VENDOR_DIR}/cpp-pinyin/res/dict"
        "$<TARGET_FILE_DIR:${SETTINGS_EXECUTABLE_NAME}>/dict"
 )

-# Ensure the loader DLL is next to the executable
+# Runtime assets next to the executable
 add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
-    COMMAND ${CMAKE_COMMAND} -E copy_if_different
-        $<$<CONFIG:Debug>:${WEBVIEW2_VCPKG_ROOT}/debug/bin/WebView2Loader.dll>
-        $<$<CONFIG:Release>:${WEBVIEW2_VCPKG_ROOT}/bin/WebView2Loader.dll>
-        $<TARGET_FILE_DIR:${PROJECT_NAME}>
    COMMAND ${CMAKE_COMMAND} -E make_directory
        $<TARGET_FILE_DIR:${PROJECT_NAME}>/assets/audios
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
@@ -11,7 +11,6 @@ This is the server end of [MSIME-Windows](https://github.com/metasequoiaime/MSIM
 - vcpkg
 - Python3.10+
 - Boost
- Node.js and pnpm 10 (settings page build)

 Make sure vcpkg and Boost are installed by **Scoop**.

@@ -31,21 +30,9 @@ Copy-Item MetasequoiaImeDict/out/* $devData -Force
 Copy-Item engine/helpcode/helpcodes $devData -Recurse -Force
 Copy-Item server/assets/tables/* $devData -Force
 Copy-Item server/assets/config/config.toml $devData -Force
-Push-Location ui-html/webview2/settings/ime-settings
-try {
-    pnpm install --frozen-lockfile
-    if ($LASTEXITCODE -ne 0) { throw 'Settings dependencies failed' }
-    pnpm build
-    if ($LASTEXITCODE -ne 0) { throw 'Settings page build failed' }
-} finally { Pop-Location }
-$devWebview = Join-Path $devData 'html/webview2'
-New-Item -ItemType Directory -Force $devWebview | Out-Null
-foreach ($part in @('shared', 'candwnd', 'ftb', 'menu')) {
-    Copy-Item "ui-html/webview2/$part" $devWebview -Recurse -Force
-}
-$devSettings = Join-Path $devWebview 'settings/ime-settings'
-New-Item -ItemType Directory -Force $devSettings | Out-Null
-Copy-Item ui-html/webview2/settings/ime-settings/dist $devSettings -Recurse -Force
+$devAssets = Join-Path $devData 'assets'
+New-Item -ItemType Directory -Force $devAssets | Out-Null
+Copy-Item server/assets/settings $devAssets -Recurse -Force
 python server/scripts/prepare_env.py
 if ($LASTEXITCODE -ne 0) { throw 'Server environment setup failed' }
 $env:LOCALAPPDATA = $devLocalData
@@ -54,10 +41,10 @@ cd server
 ```

 Use a dedicated PowerShell terminal. These steps stage the same locked data as CI
-and the current product pages in a separate development directory. Both
-`LOCALAPPDATA` (Windows config/pages) and `METASEQUOIA_IME_DATA_DIR` (Engine data)
+and the settings window assets in a separate development directory. Both
+`LOCALAPPDATA` (Windows config/assets) and `METASEQUOIA_IME_DATA_DIR` (Engine data)
 are set for that terminal; setting only the latter would still use installed
-Windows configuration and pages. Close the terminal after development.
+Windows configuration and assets. Close the terminal after development.
 Dictionary source changes belong in Engine's `dictionary/`; use its root `build_profile.py`
 to build data instead of calling internal stages in the archived Dict repository.

@@ -174,15 +174,9 @@ linear_step = 1
 [appearance]
 # 主题模式，可选："dark", "light", "system"
 theme_mode = "system"
-# 候选窗 / 悬浮工具栏 / 托盘菜单渲染，可选："d2d", "webview2"
-# 更改后需重启输入法进程生效
-ui_backend = "d2d"
 # 设置窗口关闭后在后台驻留多久再退出，驻留期间重新打开无需冷启动
 # 可选："off"（立即退出）, "1m", "5m", "10m", "30m", "60m", "forever"（一直驻留）
 settings_window_linger = "off"
-# 设置窗口渲染方式，可选："webview2", "d2d"（Direct2D，实验性）
-# 更改后设置窗口会自动重新打开
-settings_ui_backend = "webview2"
 # 分表面主题，可选："follow", "dark", "light"（follow = 跟随 theme_mode）
 theme_settings = "follow"
 theme_cand = "follow"
@@ -1,59 +1,50 @@
-# UI ownership and compatibility
+# UI ownership

-| Surface | Long-term backend | Compatibility scope |
+| Surface | Renderer | Owner |
 |---|---|---|
-| Candidate, floating toolbar, tray menu | msimeui native Direct2D/DirectWrite | `appearance.ui_backend=webview2` explicitly selects existing WebView skins |
-| Settings | UiHtml hosted by the separate native settings application | `appearance.settings_ui_backend=d2d` selects the experimental Direct2D frontend; small-window backend settings never change this host |
+| Candidate, floating toolbar, tray menu | msimeui native Direct2D/DirectWrite | `src/window/` presenters in the Server process |
+| Settings | msimeui native Direct2D/DirectWrite | `src/settings/native/` in the separate `MetasequoiaImeSettings.exe` |
 | Keyboard, handwriting, emoji and voice panels | Their existing native application/presenter | Shared actions/configuration stay in Server; panels do not own input sessions |

-`window/ui_backend_policy.h` owns backend selection. D2D is the default; existing
-WebView aliases remain readable. Unknown/retired stored values migrate to D2D,
-while new invalid configuration writes fail. A backend setting applies at process
-startup, preserving the existing controller lifetime and restart behavior.
+Direct2D is the only renderer. The WebView2 small windows, the WebView2 settings host and
+the `ui-html/` pages have been removed, together with the `appearance.ui_backend` and
+`appearance.settings_ui_backend` configuration keys; existing values are dropped by the
+template merge on upgrade.

 The candidate worker resolves output text, auxiliary codes, source badges and
-translations once into `CandidateViewItem`. Both native and Web renderers consume
-these values. HTML escaping and the legacy comma framing are confined to the Web
-adapter; native rendering receives plain text. Both click paths enter the existing
-`EnqueueCandidateUiAction` queue with the same focus owner checks and action policy.
-The ten-entry mouse range is distinct from the 1–9 keyboard shortcuts.
+translations once into `CandidateViewItem`, and the native renderer consumes these
+values as plain text. Clicks enter the existing `EnqueueCandidateUiAction` queue with the
+focus owner checks and action policy. The ten-entry mouse range is distinct from the
+1–9 keyboard shortcuts. New business behavior belongs in shared actions/session/view
+models, not in a presenter.

-WebView small windows remain a compatibility backend for existing skins. Their
-removal requires: a supported conversion path for CSS-dependent external skins;
-parity for candidate/context-menu actions, translations and accessibility; and
-recorded mixed-DPI, cold-start and signed/uiAccess host validation of the native
-replacement. Until those conditions are met, keep compatibility tests and do not
-silently reinterpret a configured WebView skin as a native skin. New business
-behavior belongs in shared actions/session/view models, not either renderer.
+## Settings window

-## Direct2D settings window (experimental)
+`MetasequoiaImeSettings.exe` draws its window with msimeui in `src/settings/native/`.
+The window speaks the message contract in `engine/contracts/webview/` (the name is
+historical): it receives `configSnapshot` and the response messages as JSON and posts
+`configUpdate` and the request messages through `HandleClientMessage` in
+`settings_app.cpp`, so config paths are mapped in one place. Its image assets live in
+`server/assets/settings/` and are installed to `<data dir>\assets\settings\`.

-`MetasequoiaImeSettings.exe` has two frontends for the same window. WebView2 hosting
-`ui-html/webview2/settings/ime-settings` stays the default; `appearance.settings_ui_backend
-= "d2d"` (or `--d2d` on the command line for one run) draws the window with msimeui
-instead, in `server/src/settings/native/`. Both frontends speak the same webview contract:
-the native window receives `configSnapshot` and the response messages as JSON and posts
-`configUpdate` and the request messages through the dispatcher the WebView2 page uses
-(`HandleClientMessage` in `settings_app.cpp`), so config paths are still mapped in one
-place. Switching the setting reopens the settings process in the other renderer.
+The pages were ported one to one from the former HTML/CSS settings page: each page
+builder in `native_page_*.cpp` names the partial and module it came from, and the
+controls in `native_settings_controls.*` name the CSS rule they mirror. Those sources
+remain in git history under `ui-html/webview2/settings/ime-settings/src/`.

-The native pages reproduce the HTML/CSS page one to one: each page builder in
-`native_page_*.cpp` follows its partial and module, and the controls in
-`native_settings_controls.*` name the CSS rule they mirror. A change to a settings page
-therefore has to be made on both sides until the WebView2 frontend is retired.
+Sciter is not an active product backend. The msimeui library owns generic controls and
+rendering, never Server configuration, pipe sessions, dictionary access, or global
+input state.

-Sciter is not an active product backend. The old unreferenced handwritten D2D
-prototype is removed; native small windows use msimeui presenters. The msimeui
-library owns generic controls and rendering, never Server configuration, pipe
-sessions, dictionary access, or global input state.
+## v2 skins

-## v2 皮肤在两个后端下的渲染
+`schema_version = 2` skins (nine-slice panel images, freely anchored decorations, space
+outside the panel) are rendered by `CandidatePresenter`'s native scene: the panel is drawn
+by `msimeui::Card::SetBackgroundImageNineSlice`, decorations by the `CandidateSkinOverlay`
+layer above the card, and `outer_insets_dip` becomes extra window space around the card.
+Parts of v2 are still being completed on the native side; see the `TODO(v2 皮肤)` notes in
+`candidate_presenter.cpp` and `candidate_skin_overlay.cpp`.

-`schema_version = 2` 的皮肤（九宫格贴图面板、自由锚定挂件、面板外空白）两个后端都支持，但走的是不同的实现：
-
- WebView2 把面板翻成 CSS：`border-image` 铺九宫格，`content_insets_dip` 落成容器内边距，挂件用 `.containerParent` 的伪元素绝对定位。
- D2D 用 `CandidatePresenter` 的本地场景：面板由 `msimeui::Card::SetBackgroundImageNineSlice` 画成九宫格，挂件由 `CandidateSkinOverlay` 这一层浮在卡片上，`outer_insets_dip` 换成窗口在卡片四边多留的空白。
-
-两侧读同一份 `skin.toml`，字段语义必须一致，尤其是 `anchor` 与 `offset_*_dip`：正数向右、向下。改一侧的定位规则要同时改另一侧。
-
-`content_insets_dip` 在两个后端都从面板外缘量起，D2D 侧由卡片内边距承担，不需要再扣边框。
+`anchor` and `offset_*_dip` follow one convention: positive values move right and down.
+`content_insets_dip` is measured from the outer edge of the panel and is carried by the
+card padding.
@@ -14,8 +14,7 @@ CompileFlags:
      "-I@VOICE_INCLUDE@",
      "-I@MINIAUDIO@",
      "-I@GUI_INCLUDE@",
-      # WebView2 includes
-      "-I@WEBVIEW2@",
+      # Windows Implementation Library includes
      "-I@WIL@",
      # Boost includes
      "-I@BOOST@",
@@ -31,18 +31,6 @@ vcpkg_include_path = normpath(
 monorepo_root_path = normpath(os.path.dirname(project_root_path))
 engine_path = normpath(os.path.join(monorepo_root_path, "engine"))
 utfcpp_path = normpath(os.path.join(engine_path, "utfcpp", "source"))
-webview2_path = normpath(
-    os.path.join(
-        user_home,
-        ".nuget",
-        "packages",
-        "microsoft.web.webview2",
-        "1.0.3240.44",
-        "build",
-        "native",
-        "include",
-    )
-)
 wil_path = normpath(
    os.path.join(
        user_home,
@@ -63,9 +51,9 @@ boost_path = normpath(
 # project_root/.clangd
 #
 # The template carries @NAME@ placeholders rather than fixed line numbers. The
-# previous version addressed lines by index, and the indices had drifted: the
-# Boost path was written over the WebView2 include and the Sciter path over a
-# comment, which left clangd unable to resolve the WebView2 headers.
+# previous version addressed lines by index, and the indices had drifted, so
+# paths were written over the wrong include lines and comments and clangd could
+# not resolve the headers they were meant for.
 #
 clangd_substitutions = {
    "@SERVER_ROOT@": MetasequoiaImeServer_root_path,
@@ -76,7 +64,6 @@ clangd_substitutions = {
    "@VOICE_INCLUDE@": engine_path + "/voice/include",
    "@MINIAUDIO@": engine_path + "/voice/third_party/miniaudio",
    "@GUI_INCLUDE@": monorepo_root_path + "/ui/include",
-    "@WEBVIEW2@": webview2_path,
    "@WIL@": wil_path,
    "@BOOST@": boost_path,
 }
@@ -173,8 +173,8 @@ function Test-Activation([IntPtr]$Target, [IntPtr]$Settings, [uint32]$SettingsTh
    $finalActive = if ($activeValues.Count) { $activeValues[$activeValues.Count - 1] } else { 0 }
    $finalFocus = if ($focusValues.Count) { $focusValues[$focusValues.Count - 1] } else { 0 }
    $requiresSettingsFocus = $targetValue -eq $Settings.ToInt64()
-    # MoveFocus transfers keyboard focus from the host HWND into WebView2's
-    # Composition input HWND, so a non-zero focus HWND is expected here.
+    # Once the settings window is active it owns keyboard focus (on itself or
+    # one of its child HWNDs), so a non-zero focus HWND is expected here.
    $settingsFocusCorrect = -not $requiresSettingsFocus -or `
        ($finalActive -eq $Settings.ToInt64() -and $finalFocus -ne 0)

@@ -1,4 +1,3 @@
-#include "window/ui_backend_policy.h"
 #include "window/caret_state_indicator_policy.h"
 #include "window/candidate_view_model.h"
 #include "ime_config.h"
@@ -203,15 +202,12 @@ std::string g_punctuation_lock = "follow";
 std::string g_candidate_window_layout = "vertical";
 bool g_candidate_window_follow_cursor = true;
 bool g_candidate_window_fit_content = false;
-std::string g_ui_backend = "d2d";
-std::string g_ui_backend_active = "d2d";
 std::string g_candidate_skin = "fluent";
 std::string g_candidate_window_preedit_style = "pinyin";
 bool g_candidate_fixed_badge = true;
 std::string g_candidate_fixed_badge_style = "paperclip";
 std::string g_candidate_ai_badge_style = "robot";
 std::string g_settings_window_linger = "off";
-std::string g_settings_ui_backend = "webview2";
 std::string g_theme_mode = "system";
 std::string g_theme_settings = "follow";
 std::string g_theme_cand = "follow";
@@ -275,13 +271,6 @@ void PublishVoiceInput(VoiceInputConfig voice)

 namespace ime_config_detail
 {
-std::string NormalizeSmallWindowUiBackend(const std::string &value)
-{
-    if (UiBackendPolicy::Resolve(UiBackendPolicy::Surface::Candidate, value) == UiBackendPolicy::Backend::WebView2)
-        return "webview2";
-    return "d2d";
-}
-
 bool IsValidCandidateSkinId(const std::string &skin)
 {
    if (skin.empty() || skin.size() > 64 || !std::isalnum(static_cast<unsigned char>(skin.front())))
@@ -313,11 +302,6 @@ bool IsValidSettingsWindowLinger(const std::string &linger)
           linger == "60m" || linger == "forever";
 }

-bool IsValidSettingsUiBackend(const std::string &backend)
-{
-    return backend == "webview2" || backend == "d2d";
-}
-
 bool IsValidTranslationTargetLanguage(const std::string &language)
 {
    static constexpr std::string_view kLanguages[] = {"en", "fr", "ja", "es", "ru", "de", "ko", "th", "vi", "it"};
@@ -743,7 +727,6 @@ bool LoadImeConfig()
        g_candidate_window_layout = layout == "horizontal" ? "horizontal" : "vertical";
        g_candidate_window_follow_cursor = tbl["appearance"]["candidate_window_follow_cursor"].value_or(true);
        g_candidate_window_fit_content = tbl["appearance"]["candidate_window_fit_content"].value_or(false);
-        g_ui_backend = NormalizeSmallWindowUiBackend(tbl["appearance"]["ui_backend"].value_or(std::string("d2d")));
        const std::string skin = tbl["appearance"]["candidate_skin"].value_or(std::string("fluent"));
        g_candidate_skin = IsValidCandidateSkinId(skin) ? skin : "fluent";
        {
@@ -770,10 +753,6 @@ bool LoadImeConfig()
            const std::string linger = tbl["appearance"]["settings_window_linger"].value_or(std::string("off"));
            g_settings_window_linger = IsValidSettingsWindowLinger(linger) ? linger : "off";
        }
-        {
-            const std::string backend = tbl["appearance"]["settings_ui_backend"].value_or(std::string("webview2"));
-            g_settings_ui_backend = IsValidSettingsUiBackend(backend) ? backend : "webview2";
-        }
        {
            const std::string theme_mode = tbl["appearance"]["theme_mode"].value_or(std::string("system"));
            if (theme_mode == "light" || theme_mode == "system" || theme_mode == "auto")
@@ -1197,7 +1176,6 @@ void InitImeConfig()
        (void)0;
 #endif
    }
-    g_ui_backend_active = g_ui_backend;
 }

 bool ReloadImeConfigIfChanged()
@@ -614,20 +614,6 @@ bool SetConfiguredCandidateAiBadgeStyle(const std::string &style);
 // "off" | "1m" | "5m" | "10m" | "30m" | "60m" | "forever"，默认 "10m"。
 const std::string &GetConfiguredSettingsWindowLinger();
 bool SetConfiguredSettingsWindowLinger(const std::string &linger);
-// "webview2" | "d2d" — renderer of the settings window, applied when it next opens.
-// Direct2D is experimental; WebView2 stays the default.
-const std::string &GetConfiguredSettingsUiBackend();
-bool SetConfiguredSettingsUiBackend(const std::string &backend);
-// "d2d" | "webview2" — candidate, floating toolbar, and tray menu renderer.
-// Changing this writes config immediately; the process snapshot does not switch
-// until the IME server is restarted.
-const std::string &GetConfiguredUiBackend();
-bool SetConfiguredUiBackend(const std::string &backend);
-// Process-lifetime renderer chosen at InitImeConfig. Independent of later reloads.
-bool UseD2dSmallWindowUi();
-// Switch this process to the D2D renderer without touching the configured value, so the user's
-// choice comes back on the next start. Only valid before the candidate window is created.
-void FallBackToD2dSmallWindowUi();
 // "fluent" | "wechat" | "graphite" | "willow_green" | "autumn_osmanthus" | "microsoft"
 // — candidate-window and floating-toolbar skin.
 const std::string &GetConfiguredCandidateSkin();
@@ -1,6 +1,5 @@
-// 候选窗外观配置：每页候选数、字体与字号、文字颜色、布局与跟随光标、小窗 UI 后端、
+// 候选窗外观配置：每页候选数、字体与字号、文字颜色、布局与跟随光标、
 // 皮肤、预编辑样式、固定徽标和设置窗口保留时长。
-#include "window/ui_backend_policy.h"
 #include "config/ime_config_internal.h"
 #include <algorithm>
 #include <cctype>
@@ -222,35 +221,6 @@ bool SetConfiguredCandidateWindowFitContent(bool enabled)
    return true;
 }

-const std::string &GetConfiguredUiBackend()
-{
-    return g_ui_backend;
-}
-
-bool SetConfiguredUiBackend(const std::string &backend)
-{
-    if (!UiBackendPolicy::IsSupported(backend))
-        return false;
-    const std::string normalized = NormalizeSmallWindowUiBackend(backend);
-    if (!WriteConfiguredValue("appearance", "ui_backend", EscapeTomlBasicString(normalized)))
-    {
-        return false;
-    }
-    g_ui_backend = normalized;
-    return true;
-}
-
-bool UseD2dSmallWindowUi()
-{
-    return UiBackendPolicy::Resolve(UiBackendPolicy::Surface::Candidate, g_ui_backend_active) ==
-           UiBackendPolicy::Backend::Native;
-}
-
-void FallBackToD2dSmallWindowUi()
-{
-    g_ui_backend_active = "d2d";
-}
-
 const std::string &GetConfiguredCandidateSkin()
 {
    return g_candidate_skin;
@@ -375,22 +345,3 @@ bool SetConfiguredSettingsWindowLinger(const std::string &linger)
    g_settings_window_linger = linger;
    return true;
 }
-
-const std::string &GetConfiguredSettingsUiBackend()
-{
-    return g_settings_ui_backend;
-}
-
-bool SetConfiguredSettingsUiBackend(const std::string &backend)
-{
-    if (!IsValidSettingsUiBackend(backend))
-    {
-        return false;
-    }
-    if (!WriteConfiguredValue("appearance", "settings_ui_backend", EscapeTomlBasicString(backend)))
-    {
-        return false;
-    }
-    g_settings_ui_backend = backend;
-    return true;
-}
@@ -71,7 +71,7 @@ bool SetConfiguredCharacterSet(const std::string &character_set)
        return false;
    }
    g_character_set = character_set;
-    // Marshal WebView/native toolbar refreshes to their owner thread. Settings
+    // Marshal toolbar refreshes to their owner thread. Settings
    // in a separate process reaches the same refresh through ConfigChanged.
    NotifyImeServer(WM_REFRESH_CHARACTER_SET, L"ConfigChanged");
    return true;
@@ -243,15 +243,12 @@ extern std::string g_punctuation_lock;
 extern std::string g_candidate_window_layout;
 extern bool g_candidate_window_follow_cursor;
 extern bool g_candidate_window_fit_content;
-extern std::string g_ui_backend;
-extern std::string g_ui_backend_active;
 extern std::string g_candidate_skin;
 extern std::string g_candidate_window_preedit_style;
 extern bool g_candidate_fixed_badge;
 extern std::string g_candidate_fixed_badge_style;
 extern std::string g_candidate_ai_badge_style;
 extern std::string g_settings_window_linger;
-extern std::string g_settings_ui_backend;
 extern std::string g_theme_mode;
 extern std::string g_theme_settings;
 extern std::string g_theme_cand;
@@ -281,12 +278,10 @@ void RefreshEffectiveTsfPreeditStyle();
 // 文件缺失或写错时返回 false，调用方据此回落到小鹤。
 bool LoadShuangpinSchema(const std::string &schema);
 VoiceInputConfig SnapshotVoiceInput();
-std::string NormalizeSmallWindowUiBackend(const std::string &value);
 bool IsValidCandidateSkinId(const std::string &skin);
 bool IsValidCandidateFixedBadgeStyle(const std::string &style);
 bool IsValidCandidateAiBadgeStyle(const std::string &style);
 bool IsValidSettingsWindowLinger(const std::string &linger);
-bool IsValidSettingsUiBackend(const std::string &backend);
 bool IsValidTranslationTargetLanguage(const std::string &language);
 std::string AiAssistantTokenSlotKey(std::string_view provider);
 // ime_config_services.cpp：按当前各段全局配置重建候选词翻译快照。改动 provider、腾讯云、
@@ -20,7 +20,6 @@ inline const UINT UPDATE_FTB_STATUS = WM_USER + 108;
 inline const UINT WM_PIN_TO_TOP_CANDIDATE = WM_USER + 109;
 inline const UINT WM_COMMIT_CANDIDATE = WM_USER + 110;
 inline const UINT WM_CLEAR_IME_ENGINE_CACHE = WM_USER + 111;
-inline const UINT WM_REFRESH_MENU_SIZE = WM_USER + 112;
 inline const UINT WM_FIX_CANDIDATE_POSITION = WM_USER + 113;
 inline const UINT WM_CLEAR_CANDIDATE_POSITION = WM_USER + 114;
 inline const UINT UPDATE_FTB_ENGLISH_INPUT_MODE = WM_USER + 115;
@@ -6,14 +6,6 @@
 inline float SCALE = 1.0f;
 inline int POP_UP_WND_WIDTH = 43;
 inline int POP_UP_WND_HEIGHT = 55;
-// WebView2 candidate shadow reserve in CSS DIPs. Keep these in sync with the
-// two-layer shadows in ui-html/webview2/candwnd/skins. The shadow is biased to
-// the lower right, so symmetric padding either clips its soft tail or reserves
-// too much transparent hit-test area on the upper-left side.
-inline constexpr int CANDIDATE_SHADOW_PAD_LEFT = 16;
-inline constexpr int CANDIDATE_SHADOW_PAD_TOP = 14;
-inline constexpr int CANDIDATE_SHADOW_PAD_RIGHT = 32;
-inline constexpr int CANDIDATE_SHADOW_PAD_BOTTOM = 34;

 //
 // 候选窗口
@@ -23,8 +15,6 @@ inline constexpr int CANDIDATE_SHADOW_PAD_BOTTOM = 34;
 //
 inline int CANDIDATE_WINDOW_WIDTH = 120;
 inline int CANDIDATE_WINDOW_HEIGHT = 232;
-// Horizontal (and long vertical) candidates wrap beyond this CSS DIP width.
-inline constexpr int CANDIDATE_WINDOW_MAX_WIDTH_DIP = 720;

 inline int DEFAULT_WINDOW_WIDTH = CANDIDATE_WINDOW_WIDTH;
 inline int DEFAULT_WINDOW_HEIGHT = CANDIDATE_WINDOW_HEIGHT;
@@ -41,7 +31,7 @@ inline bool is_global_wnd_cand_shown = false;

 //
 // 托盘区语言栏菜单窗口
-// MENU_CONTENT_*_DIP is the measured CSS size; MENU_WINDOW_* is the derived
+// MENU_CONTENT_*_DIP is the measured content size; MENU_WINDOW_* is the derived
 // physical host size (dip * current scale). Caching DIPs lets live DPI changes
 // and each show recompute physical size without a stale pixel cache.
 //
@@ -57,11 +47,11 @@ inline bool is_global_wnd_menu_shown = false;
 // 悬浮工具栏窗口
 //
 inline int FTB_WND_WIDTH = 207;
-// Content bar height in DIPs (matches CSS --ftb-bar-height). Shadow is added on
-// the host separately so box-shadow is not clipped.
+// Content bar height in DIPs. The initial host adds the shadow margin
+// separately so the shadow is not clipped.
 inline int FTB_WND_HEIGHT = 35;
 inline int FTB_WND_SHADOW_WIDTH = 8;
-// Last measured .status-bar size in CSS DIPs (0 until first successful measure).
+// Last measured bar size in DIPs (0 until first successful measure).
 inline double FTB_CONTENT_WIDTH_DIP = 0.0;
 inline double FTB_CONTENT_HEIGHT_DIP = 0.0;
 // Off-screen margin (physical px) the host was last placed with, so a resize
@@ -248,9 +248,6 @@ inline std::string NumHanSeparator = " "; // Number and Hanzi separator
 namespace Global
 {
 inline LONG INVALID_Y = -100000;
-inline int MarginTop = 0;
-// Horizontal offset of the opaque card inside the stable (often 720 DIP-wide) host.
-inline int MarginLeft = 0;

 // Candidate pages are published by the IPC worker thread but painted by the UI thread. The worker
 // stamps every published page (candidate_page_generation), the UI echoes back the generation it
@@ -418,7 +415,7 @@ inline CandidateUiState candidate_ui;
 // candidate_ui belongs to the IPC worker thread, which rebuilds and destroys its vectors while the UI thread paints;
 // the handoff is an asynchronous PostMessage, so nothing serialises the two. The worker therefore copies each finished
 // page into one of these immutable snapshots and publishes it atomically, and every UI-thread reader (candidate
-// presenter, its mouse callbacks, the WebView2 payload) loads a snapshot once and reads only from that copy.
+// presenter and its mouse callbacks) loads a snapshot once and reads only from that copy.
 struct CandidatePageSnapshot
 {
    std::vector<CandidateViewItem> page_views;
@@ -14,7 +14,7 @@ namespace FanyImeIpc
 // condition variable timeout (rounded up to one timer tick, ~16ms) is the only slack on top of
 // this bound; together with candidate resolution it must stay well inside that budget. The
 // frequency write runs after the reply and no longer competes for it. On a slow machine (battery,
-// WebView2 paint) a paint regularly takes longer than 30ms, and settling against the unpainted
+// busy GPU) a paint regularly takes longer than 30ms, and settling against the unpainted
 // page is exactly the "committed something I did not see" bug, so the bound leaves room for a slow
 // paint. On timeout the caller continues with the current data and the diagnostic log records the
 // miss. Do not raise this without re-deriving the TSF budget.
@@ -37,10 +37,9 @@ constexpr bool ShouldWaitForCandidateRender(std::uint64_t rendered, std::uint64_
    return rendered < current;
 }

-// The render echo only moves forward. WebView2 echoes from async DOM callbacks, so a content-only
-// update's callback can land after a dedup of the same content already echoed the newer generation;
-// storing the older one left rendered one behind published and every selection waited out the full
-// bound.
+// The render echo only moves forward. An echo for an older page can arrive after a dedup of the
+// same content already echoed the newer generation; storing the older one would leave rendered one
+// behind published, and every selection would wait out the full bound.
 constexpr std::uint64_t AdvanceRenderedCandidateGeneration(std::uint64_t rendered, std::uint64_t echoed) noexcept
 {
    return echoed > rendered ? echoed : rendered;
@@ -57,7 +57,7 @@ bool g_english_input_mode = false;
 namespace
 {
 // Sticky UILess for the active Main-pipe client. When set, never raise the
-// WebView2 candidate HWND — hosts (games) draw via ITfUIElementSink instead.
+// candidate HWND — hosts (games) draw via ITfUIElementSink instead.
 bool g_activate_uiless = false;
 bool g_session_uiless = false;
 } // namespace
@@ -120,8 +120,8 @@ void ApplyUiLessFromPacket(const FanyImeNamedpipeData &pipe_data)
        g_candidate_translation_signature.clear();
        g_candidate_translation_glosses.clear();
        EnglishIme::ClearTranslations();
-        // A prior non-UILess session may have left the WebView2 candidate HWND
-        // visible; hide it immediately when the host takes over drawing.
+        // A prior non-UILess session may have left the candidate HWND visible;
+        // hide it immediately when the host takes over drawing.
        ::is_global_wnd_cand_shown = false;
        Global::SetCandidateWindowRenderedVisible(false);
        if (::global_hwnd && IsWindow(::global_hwnd))
@@ -194,8 +194,8 @@ void RequestShowCandidateWindow()
 // because there is nothing left to offer as candidates.
 void HideCandidateWindowAndDropItems()
 {
-    // Drop published candidates before any in-flight FineTuneWindow callback can
-    // re-inflate an empty-preedit + stale-candidate view.
+    // Drop published candidates before a queued show can re-render an
+    // empty-preedit + stale-candidate view.
    Global::CandidateString.clear();
    Global::ClearCandidatePageSnapshot();
    Global::candidate_ui.set_items({});
@@ -16,9 +16,9 @@
 inline std::condition_variable pipe_queueCv;
 inline std::atomic_bool pipe_running = true;
 inline std::shared_ptr<IInputSession> g_inputSession;
-// Collapse bursty TSF show/move packets so the UI thread runs one FineTune
-// against the latest Global::Point / CandidateString instead of restarting
-// the WebView2 measure chain on every cloud refresh or layout notification.
+// Collapse bursty TSF show/move packets so the UI thread lays out once against
+// the latest Global::Point / CandidateString instead of on every cloud refresh
+// or layout notification.
 inline std::atomic<bool> g_candidate_show_msg_pending{false};
 inline std::atomic<bool> g_candidate_move_msg_pending{false};

@@ -21,12 +21,12 @@
 #include "engine/contracts/assets/assets.h"
 #include "engine/core/runtime_paths.h"
 #include "engine/local_modes/radical_query.h"
+#include "global/globals.h"
 #include "utils/common_utils.h"
 #include "utils/hanzi_pinyin.h"
 #include "utils/single_instance.h"
 #include "session/session_factory.h"
 #include "statistics/stats_pipe.h"
-#include "webview2/windows_webview2.h"
 #include "voice-input/voice_input_service.h"

 namespace
@@ -120,7 +120,6 @@ int CALLBACK WinMain(_In_ HINSTANCE hInstance, _In_ HINSTANCE /*hPrevInstance*/,

    // Initialize config
    InitImeConfig();
-    FallBackToD2dIfWebView2RuntimeMissing();
    VoiceInput::Initialize();
    Global::candidate_ui.page_size = GetConfiguredCandidatePageSize();

@@ -170,8 +169,8 @@ int CALLBACK WinMain(_In_ HINSTANCE hInstance, _In_ HINSTANCE /*hPrevInstance*/,
    {
        // The release runner is a Windows service without an interactive
        // window station. The pipe probe still exercises the real Server and
-        // all IPC worker threads, but must not create candidate/WebView2
-        // windows or start UI-bound background services.
+        // all IPC worker threads, but must not create candidate windows or
+        // start UI-bound background services.
        Sleep(INFINITE);
    }

@@ -218,7 +217,6 @@ int CALLBACK WinMain(_In_ HINSTANCE hInstance, _In_ HINSTANCE /*hPrevInstance*/,
        radical_warmup.join();

    FanyNamedPipe::RegisterStatusSnapshotWindow(nullptr);
-    ShutdownWebviews();

    EnglishIme::Stop();
    CloudTranslation::Stop();
@@ -486,7 +486,7 @@ bool ImportModel(const std::string &model_id, const std::filesystem::path &sourc

 std::filesystem::path PromptForModelFile(HWND owner)
 {
-    // 设置窗口的 UI 线程早已为 WebView2 初始化过 STA，这里的 CoInitializeEx 只是配平引用计数。
+    // 设置窗口的 UI 线程启动时已初始化过 STA，这里的 CoInitializeEx 只是配平引用计数。
    const HRESULT init = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
    std::filesystem::path selected;
    IFileOpenDialog *dialog = nullptr;
@@ -545,11 +545,8 @@ VisualPtr BuildAppearancePage(PageContext &context)
        });
    }

-    // 界面渲染
+    // 输入法进程与设置窗口
    {
-        Dropdown::Options backend;
-        backend.minWidth = 120.0f;
-        backend.matchToggleWidth = true;
        Dropdown::Options linger;
        linger.minWidth = 150.0f;
        linger.matchToggleWidth = true;
@@ -568,13 +565,7 @@ VisualPtr BuildAppearancePage(PageContext &context)
            SetTimer(host->Hwnd(), 0x4E60, 3000, &RestoreRestartButton);
        });
        page.AddSection(MakeRows({
-            MakeRow(L"界面渲染", L"用于候选窗、悬浮工具栏和托盘菜单。更改后需重启输入法进程才会生效。",
-                    BindDropdown(context, "appearance.ui_backend",
-                                 Options({{"d2d", L"Direct2D"}, {"webview2", L"WebView2"}}), backend)),
-            MakeRow(L"设置窗口渲染", L"Direct2D 为实验性功能。切换后设置窗口会自动重新打开。",
-                    BindDropdown(context, "appearance.settings_ui_backend",
-                                 Options({{"webview2", L"WebView2"}, {"d2d", L"Direct2D（实验性）"}}), backend)),
-            MakeRow(L"重启输入法进程", L"立即重启输入法后台进程，使渲染方式等需要重启的设置生效。", restart),
+            MakeRow(L"重启输入法进程", L"立即重启输入法后台进程，使需要重启的设置生效。", restart),
            MakeRow(L"设置窗口后台驻留",
                    L"关闭设置窗口后在后台保留一段时间，期间重新打开无需等待加载；驻留越久占用内存越久。",
                    BindDropdown(context, "appearance.settings_window_linger",
@@ -81,7 +81,7 @@ class DictTabs : public msimeui::Visual

  private:
    // Chrome lays the 15px system font out in a ~21.3px line, a little taller than
-    // DirectWrite's natural line (measured against the WebView2 page).
+    // DirectWrite's natural line (measured against the former web page).
    static float TabLineHeight()
    {
        return std::max(LineHeight(TabStyle()), 21.33f);
@@ -10,7 +10,7 @@
 #include <vector>

 // Pieces shared by the dictionary page and the quick-phrase card of the tools page, both
-// built on the WebView2 page's dict.css: `.dict-card`, `.dict-toolbar`, `.dict-input`,
+// ported from the former web page's dict.css: `.dict-card`, `.dict-toolbar`, `.dict-input`,
 // `.dict-table`, `.dict-pagination`, `.dict-dialog`, and the dictionaryRequest client.
 namespace native_settings
 {
@@ -217,7 +217,7 @@ struct VoicePage : std::enable_shared_from_this<VoicePage>

    void Write(const std::string &path, Json value)
    {
-        // The page applies host snapshots only, as the WebView2 page does; its own writes
+        // The page applies host snapshots only; its own writes
        // do not loop back through Sync.
        ++localWrites;
        context.model.Update(path, std::move(value));
@@ -3370,7 +3370,7 @@ void BitmapImage::Render(msimeui::DeviceResources &dr)
 std::wstring AssetPath(const std::wstring &relativePath)
 {
    static const std::filesystem::path root =
-        std::filesystem::path(CommonUtils::get_ime_data_path_w()) / L"html/webview2/settings/ime-settings/dist/assets";
+        std::filesystem::path(CommonUtils::get_ime_data_path_w()) / L"assets/settings";
    return (root / relativePath).wstring();
 }

@@ -14,9 +14,9 @@
 #include <string>
 #include <vector>

-// Controls of the Direct2D settings window. Each one reproduces a component of the
-// WebView2 settings page; the CSS selector it mirrors is named on the class, and the
-// numbers inside come from that rule. Every color is read from CurrentPalette() at
+// Controls of the Direct2D settings window. Each one was ported from a component of the
+// former web settings page (see native_settings_pages.h); the CSS selector it came from
+// is named on the class, and the numbers inside come from that rule. Every color is read from CurrentPalette() at
 // render time, so switching the theme only needs a repaint.
 //
 // Layout units are DIPs, which is what CSS px are at the page's zoom factor 1.0.
@@ -882,7 +882,7 @@ class BitmapImage : public msimeui::Visual
    float radius_ = 0.0f;
 };

-// Reads an SVG asset of the WebView2 page (".../dist/assets/<relative>").
+// Reads an SVG asset of the settings window (<data dir>\assets\settings\<relative>).
 std::string LoadAssetSvg(const std::wstring &relativePath);
 std::wstring AssetPath(const std::wstring &relativePath);
 // CSS `filter: invert(1) brightness(b)` applied to every color literal of an SVG,
@@ -9,8 +9,8 @@
 #include <string_view>
 #include <vector>

-// Client side of the settings bridge for the Direct2D window. It speaks exactly the
-// protocol the WebView2 page speaks (engine/contracts/webview): the host pushes
+// Client side of the settings bridge for the Direct2D window. It speaks the settings
+// protocol of engine/contracts/webview: the host pushes
 // `configSnapshot` and response messages, the window posts `configUpdate` and request
 // messages. settings_app.cpp stays the only place that maps config paths to setters.
 namespace native_settings
@@ -10,8 +10,11 @@
 #include <string>
 #include <vector>

-// Page builders of the Direct2D settings window, one per sidebar entry of the WebView2
-// page (ui-html/.../partials/<id>.html + modules/<id>.ts). A builder returns the page
+// Page builders of the Direct2D settings window, one per sidebar entry. They were ported
+// one to one from the former WebView2 settings page, which was removed together with
+// WebView2; the "partials/<id>.html + modules/<id>.ts" notes at the top of each
+// native_page_*.cpp name its sources, still in git history under
+// ui-html/webview2/settings/ime-settings/src/. A builder returns the page
 // content once; afterwards the page keeps itself in sync through PageContext::OnConfig
 // and the model's message listeners.
 namespace native_settings
@@ -3,9 +3,9 @@
 #include <d2d1.h>
 #include <string>

-// Colors and type scale of the Direct2D settings window. Every value mirrors a CSS
-// custom property of the WebView2 settings page (ui-html/.../styles/variables.css);
-// the property name is noted where it is not obvious, so the two stay comparable.
+// Colors and type scale of the Direct2D settings window. Every value was taken from a CSS
+// custom property of the former web settings page (styles/variables.css, see
+// native_settings_pages.h); the property name is noted where it is not obvious.
 namespace native_settings
 {
 constexpr D2D1_COLOR_F Hex(unsigned rgb, float alpha = 1.0f)
@@ -1075,7 +1075,7 @@ class SettingsWindowImpl : public HostServices
        window_->SetQuitOnDestroy(false);
        // The frame is extended into the client area for the custom caption; DWM does not
        // compose an HWND render target's output there, a composition swap chain it does.
-        // Opaque, so text can use ClearType like the WebView2 page does.
+        // Opaque, so text can use ClearType.
        window_->SetCompositionRendering(true, true);
        window_->SetTextAntialiasMode(D2D1_TEXT_ANTIALIAS_MODE_CLEARTYPE);
        SetLayoutScale(static_cast<float>(GetDpiForWindow(hwnd_)) / 96.0f);
@@ -6,10 +6,9 @@
 #include <memory>
 #include <string>

-// The Direct2D settings window (appearance.settings_ui_backend = "d2d"). It adopts the
-// HWND that settings_app.cpp creates, so the window class, single-instance activation,
-// lingering and the worker that applies config writes stay shared with the WebView2
-// frontend; only painting and input are handled here.
+// The Direct2D settings window. It adopts the HWND that settings_app.cpp creates; the
+// window class, single-instance activation, lingering and the worker that applies config
+// writes live there, and only painting and input are handled here.
 namespace native_settings
 {
 class SettingsWindowImpl;
@@ -19,7 +18,7 @@ class SettingsWindow
  public:
    struct Callbacks
    {
-        // A client message, serialized exactly as the WebView2 page would post it.
+        // A client message of the webview contract (engine/contracts/webview), serialized.
        std::function<void(const std::string &message)> postToHost;
    };