移除不存在的Properties文件引用

- 移除Properties\AssemblyInfo.cs引用
- 移除Properties\Resources.Designer.cs引用
- 移除Properties\Settings.Designer.cs引用
- 移除Properties\Settings.settings引用
- 移除app.manifest引用

这些文件在项目中不存在，导致编译失败

🤖 Generated with [Claude Code](https://claude.com/claude.com)

Co-Authored-By: Claude <noreply@anthropic.com>

SlideCombine.csproj

@@ -33,9 +33,6 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
-  <PropertyGroup>
-    <ApplicationManifest>app.manifest</ApplicationManifest>
-  </PropertyGroup>
     <ItemGroup>
     <Reference Include="System" />
     <Reference Include="System.Core" />
@@ -70,25 +67,5 @@
     </EmbeddedResource>
     <EmbeddedResource Include="app.ico" />
   </ItemGroup>
-  <ItemGroup>
-    <None Include="Properties\Settings.settings">
-      <Generator>SettingsSingleFileGenerator</Generator>
-      <LastGenOutput>Settings.Designer.cs</LastGenOutput>
-    </None>
-    <None Include="app.manifest" />
-  </ItemGroup>
-  <ItemGroup>
-    <Compile Include="Properties\AssemblyInfo.cs" />
-    <Compile Include="Properties\Resources.Designer.cs">
-      <AutoGen>True</AutoGen>
-      <DesignTime>True</DesignTime>
-      <DependentUpon>Resources.resx</DependentUpon>
-    </Compile>
-    <Compile Include="Properties\Settings.Designer.cs">
-      <AutoGen>True</AutoGen>
-      <DesignTimeSharedInput>True</DesignTimeSharedInput>
-      <DependentUpon>Settings.settings</DependentUpon>
-    </Compile>
-  </ItemGroup>
     <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>