update ci workflow

.gitea/workflows/app_builder.yaml

@@ -89,15 +89,15 @@ jobs:
 
           git commit -m 'Update version to ${{ github.ref_name }}'
           if ($LASTEXITCODE -ne 0) {
-            Write-Host 'No changes to commit.'
+            # Version files already match the tag -> nothing to push, succeed quietly.
+            Write-Host 'No version changes to commit; skipping push.'
+            exit 0
           }
 
-          # Get current branch; if detached, resolve to a remote branch that contains this commit
-          $branch = (git rev-parse --abbrev-ref HEAD).Trim()
-          if ($branch -eq 'HEAD' -or [string]::IsNullOrEmpty($branch)) {
-            # If target_commitish is a branch, use it; if it's a SHA, find a branch that contains it
-            $candidate = '${{ github.event.release.target_commitish }}'
-            if ($candidate -match '^[0-9a-f]{40}$') {
+          # The release build runs in detached HEAD on the tag. Resolve the branch
+          # that should receive the version bump.
+          $branch = '${{ github.event.release.target_commitish }}'
+          if ([string]::IsNullOrEmpty($branch) -or $branch -match '^[0-9a-f]{40}$') {
             $branch = (
               git branch -r --contains $env:GITHUB_SHA |
               ForEach-Object { $_.Trim() } |
@@ -105,9 +105,6 @@ jobs:
               ForEach-Object { $_ -replace '^(?:remotes/)?[^/]+/', '' } |
               Select-Object -First 1
             )
-            } else {
-              $branch = $candidate
-            }
           }
 
           if ([string]::IsNullOrEmpty($branch)) {
@@ -116,6 +113,16 @@ jobs:
             exit 1
           }
 
+          # The tag may be behind the branch tip. Replay the bump commit on top of
+          # the current remote branch so the push is a clean fast-forward.
+          git fetch origin $branch
+          git rebase "origin/$branch"
+          if ($LASTEXITCODE -ne 0) {
+            git rebase --abort
+            Write-Host "Rebase onto origin/$branch failed."
+            exit 1
+          }
+
           git push origin "HEAD:refs/heads/$branch"
 
       - name: Build Tauri App