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LanMountainDesktop/.trae/documents/avalonia12-migration-plan.md
lincube abfa64b3d7 Avalonia12 (#7)
* ava12升级

* Enable centralized package versioning

Add <Project> and <PropertyGroup> with <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally> to Directory.Packages.props to enable centralized package version management across the repository. This allows package versions to be controlled from this single file instead of individual project files.

* Migrate codebase to Avalonia 12 APIs

Apply Avalonia 12 migration changes: replace SystemDecorations with WindowDecorations and remove ExtendClientAreaChromeHints/ExtendClientAreaTitleBarHeightHint usages; update BindingPlugins removal logic (no-op); switch clipboard usage to ClipboardExtensions.SetTextAsync; update Bitmap.CopyPixels calls to the new signature. Replace TextBox.Watermark with PlaceholderText, convert NumberBox styles to FANumberBox and adjust templates, change Checked/Unchecked handlers to IsCheckedChanged, and adapt FluentIcons usages (SymbolIconSource -> FASymbol/FAFont/FluentIcon equivalents). Fix MainWindow partial classes to inherit Window and correct missing variables/fields/usings. Add migration docs/specs/tasks under .trae and include a small TestFluentIcons project for icon testing.

* Migrate to Avalonia 12 and Plugin SDK v5

Upgrade project to the Avalonia 12 baseline and Plugin SDK v5: centralize Avalonia packages, remove legacy WebView.Avalonia usage (use NativeWebView/WebView2 EnvironmentRequested), and update Fluent/Material icon/package usages. Bump multiple package/project versions to 5.0.0 and Avalonia 12.0.1, update plugin template and README/docs to SDK v5, and add PLUGIN_SDK_V5_MIGRATION.md.

Also fix runtime/behavior bugs: make DataLocationResolver use a fixed bootstrap launcher data path and avoid recursive ResolveDataRoot; add legacy-state handling and extraction in OobeStateService; and update component settings tests to reflect migrated storage (DB/backup) and reset cache for test reloads. Various csproj, tests, and docs updated to reflect the migration and ensure build/test compatibility.

* Update icon glyphs and symbol mappings

Replace and refine icon sources across settings pages and controls: many FAFontIconSource glyphs were updated to specific Seagull Fluent Icons codepoints, some FASymbolIconSource usages were replaced with FAFontIconSource, and a number of symbol-to-Symbol enum mappings were adjusted (e.g. "Bell" -> AlertOn, "Shield" -> ShieldLock). Also clarified a comment in SettingsWindow and fixed a trailing newline in StudySettingsPage. Changes standardize icon visuals and bridge FluentIcons glyphs into FluentAvalonia icon sources.

* fix.修复合并产生的问题。
2026-04-29 12:14:29 +08:00

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# Avalonia 12 迁移计划
## 当前状态
项目已完成以下迁移准备:
* `Directory.Packages.props` 中 Avalonia 包已升级到 `12.0.1`
* `FluentAvaloniaUI` 已升级到 `3.0.0-preview1`
* `Avalonia.Diagnostics` 已替换为 `AvaloniaUI.DiagnosticsSupport`
* `Avalonia.Controls.WebView` 已升级到 `12.0.0`
* `ClassIsland.Markdown.Avalonia` 已升级到 `12.0.0`
## 构建错误清单26 errors
### 1. 窗口装饰 API 移除8 errors
**文件**`LanMountainDesktop/Views/SettingsWindow.axaml.cs`4 errors
* `ExtendClientAreaChromeHints` 不存在line 166, 179
* `SystemDecorations` 已过时,需改用 `WindowDecorations`line 168, 177
**文件**`LanMountainDesktop/Views/ComponentEditorWindow.axaml.cs`4 errors
* `ExtendClientAreaChromeHints` 不存在line 63, 72
* `SystemDecorations` 已过时,需改用 `WindowDecorations`line 65, 70
**AXAML 文件**13 个文件使用 `SystemDecorations` 属性(编译警告)
### 2. 变量/字段未找到8 errors
**文件**`LanMountainDesktop/Views/MainWindow.ComponentSystem.cs`
* `centerLeft` 不存在line 759, 766, 778
* `positions` 不存在line 1266
**文件**`LanMountainDesktop/Views/MainWindow.DesktopPaging.cs`
* `child` 不存在line 312
* `_isThreeFingerOrRightDragSwipeActive` 不存在line 517, 828, 847, 850
### 3. API 变更3 errors
**文件**`LanMountainDesktop/App.axaml.cs`
* `BindingPlugins` 不可访问line 532, 537
**文件**`LanMountainDesktop/Views/Components/DesktopComponentFailureView.cs`
* `IClipboard.SetTextAsync` 不存在line 187
**文件**`LanMountainDesktop/Services/MonetColorService.cs`
* `Bitmap.CopyPixels` 参数不匹配line 91
### 4. 第三方库变更1 error
**文件**`LanMountainDesktop/Views/SettingsWindow.axaml.cs`
* `FluentIcons.Avalonia.SymbolIconSource` 不存在line 215
### 5. 过时属性警告(需同步修复)
* `TextBox.Watermark``PlaceholderText`7 处 .cs + 7 处 .axaml
## 迁移步骤
### Phase 1: 修复窗口装饰 API高优先级
1. 重写 `SettingsWindow.ApplyChromeMode()` 使用 Avalonia 12 新 API
2. 重写 `ComponentEditorWindow.ApplyChromeMode()` 使用 Avalonia 12 新 API
3. 批量替换所有 `.axaml` 中的 `SystemDecorations``WindowDecorations`
### Phase 2: 修复 MainWindow 编译错误(高优先级)
1. 检查 `MainWindow.ComponentSystem.cs``centerLeft``positions` 的作用域问题
2. 检查 `MainWindow.DesktopPaging.cs``child``_isThreeFingerOrRightDragSwipeActive` 的作用域问题
3. 确认这些变量是否被意外删除或重命名
### Phase 3: 修复 Avalonia 12 API 变更(中优先级)
1. `App.axaml.cs`: 替换 `BindingPlugins.DataValidators` 的访问方式
2. `DesktopComponentFailureView.cs`: 使用新的剪贴板 API
3. `MonetColorService.cs`: 更新 `Bitmap.CopyPixels` 调用签名
### Phase 4: 修复第三方库变更(中优先级)
1. `SettingsWindow.axaml.cs`: 替换 `FluentIcons.Avalonia.SymbolIconSource` 为 v3 等效 API
### Phase 5: 清理过时属性(低优先级)
1. 批量替换 `Watermark``PlaceholderText`(所有 .cs 和 .axaml
## 验证步骤
* 每阶段修复后运行 `dotnet build LanMountainDesktop.slnx -c Debug`
* 最终运行 `dotnet test LanMountainDesktop.slnx -c Debug`