refactor: remove Excel export functionality

Removed BomExcelExporter service, BomExcelSettings class, BomTemplate.xlsx template, and EPPlus package dependency. This functionality is being replaced with direct API integration.

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

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

ExportDXF/ExportDXF.csproj

@@ -103,6 +103,12 @@
     <Compile Include="Extensions\TimeSpanExtensions.cs" />
     <Compile Include="Extensions\UIExtensions.cs" />
     <Compile Include="Extensions\UnitConversionExtensions.cs" />
+    <Compile Include="Forms\DrawingSelectionForm.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="Forms\DrawingSelectionForm.Designer.cs">
+      <DependentUpon>DrawingSelectionForm.cs</DependentUpon>
+    </Compile>
     <Compile Include="Forms\MainForm.cs">
       <SubType>Form</SubType>
     </Compile>
@@ -116,11 +122,11 @@
     <Compile Include="Forms\ViewFlipDeciderComboboxItem.cs" />
     <Compile Include="Models\DocumentType.cs" />
     <Compile Include="Models\ExportContext.cs" />
+    <Compile Include="Models\BomItem.cs" />
     <Compile Include="Models\Item.cs" />
+    <Compile Include="Models\LogEvent.cs" />
     <Compile Include="Models\SolidWorksDocument.cs" />
-    <Compile Include="Services\BomExcelExporter.cs" />
     <Compile Include="Services\BomExtractor.cs" />
-    <Compile Include="Services\BomExcelSettings.cs" />
     <Compile Include="Services\DrawingExporter.cs" />
     <Compile Include="Services\DxfExportService.cs" />
     <Compile Include="Services\CutFabApiClient.cs" />
@@ -137,6 +143,9 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="ViewFlipDeciders\PreferUpViewFlipDecider.cs" />
     <Compile Include="ViewFlipDeciders\ViewFlipDeciderFactory.cs" />
+    <EmbeddedResource Include="Forms\DrawingSelectionForm.resx">
+      <DependentUpon>DrawingSelectionForm.cs</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="Forms\MainForm.resx">
       <DependentUpon>MainForm.cs</DependentUpon>
     </EmbeddedResource>
@@ -163,9 +172,6 @@
     <Content Include="Templates\Blank.drwdot">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </Content>
-    <Content Include="Templates\BomTemplate.xlsx">
-      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
-    </Content>
   </ItemGroup>
   <ItemGroup>
     <None Include="Resources\edit_alt.png" />
@@ -193,18 +199,31 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
-  <ItemGroup>
-    <PackageReference Include="EPPlus">
-      <Version>4.5.3.1</Version>
-    </PackageReference>
-  </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\EtchBendLines\EtchBendLines\EtchBendLines.csproj">
       <Project>{229c2fb9-6ad6-4a5d-b83a-d1146573d6f9}</Project>
       <Name>EtchBendLines</Name>
     </ProjectReference>
   </ItemGroup>
-  <ItemGroup />
+  <ItemGroup>
+    <COMReference Include="AcroPDFLib">
+      <Guid>{05BFD3F1-6319-4F30-B752-C7A22889BCC4}</Guid>
+      <VersionMajor>1</VersionMajor>
+      <VersionMinor>0</VersionMinor>
+      <Lcid>0</Lcid>
+      <WrapperTool>tlbimp</WrapperTool>
+      <Isolated>False</Isolated>
+      <EmbedInteropTypes>True</EmbedInteropTypes>
+    </COMReference>
+    <COMReference Include="AxAcroPDFLib">
+      <Guid>{05BFD3F1-6319-4F30-B752-C7A22889BCC4}</Guid>
+      <VersionMajor>1</VersionMajor>
+      <VersionMinor>0</VersionMinor>
+      <Lcid>0</Lcid>
+      <WrapperTool>aximp</WrapperTool>
+      <Isolated>False</Isolated>
+    </COMReference>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.