publish: 1.2.12 — harden VSTO rename + reissue broken v1.2.11 release

v1.2.11 shipped a broken publish.tar.gz: the Rename-Item that turns
`MarcusLaw.OutlookAddin.vsto` into the canonical `OutlookAddin.vsto`
failed silently (script ran with $ErrorActionPreference = 'Continue'),
so the docker image had no OutlookAddin.vsto at the expected path and
the CDN 404'd on the auto-update URL. Gitea Generic packages are
immutable, so 1.2.11 cannot be republished.

Restrict the .vsto lookup to publish/ root (Get-ChildItem -File, no
-Recurse) so the inner versioned manifest under Application Files is
never picked, switch the rename to -ErrorAction Stop, and assert that
publish/OutlookAddin.vsto exists before continuing.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -258,15 +258,21 @@ jobs:
               & msbuild @msbuildArgs
               if ($LASTEXITCODE -ne 0) { throw "msbuild /t:Publish failed with $LASTEXITCODE" }
 
-              # Sanity check: did the VSTO publish target produce a .vsto file?
-              $vsto = Get-ChildItem -Recurse -Filter '*.vsto' -Path publish | Select-Object -First 1
-              if (-not $vsto) { throw "msbuild /t:Publish completed but no .vsto file found under publish/" }
+              # Sanity check + rename to canonical OutlookAddin.vsto so the URL
+              # matches PROVIDER_URL (hardcoded to .../OutlookAddin.vsto). Restrict
+              # to publish/ root -- there's a second .vsto inside Application Files
+              # that must keep its versioned name. Verify the renamed file exists
+              # before continuing; v1.2.11 shipped broken because a silent failure
+              # here left no OutlookAddin.vsto in the tar and 404'd the CDN.
+              $vsto = Get-ChildItem -File -Filter '*.vsto' -Path publish | Select-Object -First 1
+              if (-not $vsto) { throw "msbuild /t:Publish completed but no .vsto file found at publish/ root" }
               Write-Host "  produced $($vsto.FullName)"
-
-              # Rename to canonical OutlookAddin.vsto so the ClickOnce manifest
-              # URL matches PROVIDER_URL (which is hardcoded to .../OutlookAddin.vsto).
               if ($vsto.Name -ne 'OutlookAddin.vsto') {
-                  Rename-Item -LiteralPath $vsto.FullName -NewName 'OutlookAddin.vsto'
+                  Rename-Item -LiteralPath $vsto.FullName -NewName 'OutlookAddin.vsto' -ErrorAction Stop
+                  Write-Host "  renamed -> OutlookAddin.vsto"
+              }
+              if (-not (Test-Path 'publish/OutlookAddin.vsto')) {
+                  throw "post-rename: publish/OutlookAddin.vsto does not exist"
               }
 
               Write-Host "=== STEP F: stage protocol handler ==="

src/OutlookAddin/Properties/AssemblyInfo.cs

@@ -33,6 +33,6 @@ using System.Security;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.2.11.0")]
-[assembly: AssemblyFileVersion("1.2.11.0")]
+[assembly: AssemblyVersion("1.2.12.0")]
+[assembly: AssemblyFileVersion("1.2.12.0")]