ci: upsert release — reuse existing release if tag already exists

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/release.yml

@@ -29,16 +29,27 @@ jobs:
           PACKAGE_VERSION: ${{ steps.get-version.outputs.version }}
         with:
           script: |
+            const tag = `app-v${process.env.PACKAGE_VERSION}`;
+            try {
+              const { data } = await github.rest.repos.getReleaseByTag({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                tag,
+              });
+              return data.id;
+            } catch (e) {
+              if (e.status !== 404) throw e;
+            }
             const { data } = await github.rest.repos.createRelease({
               owner: context.repo.owner,
               repo: context.repo.repo,
-              tag_name: `app-v${process.env.PACKAGE_VERSION}`,
+              tag_name: tag,
               name: `Psysonic v${process.env.PACKAGE_VERSION}`,
               body: 'See the assets to download this version and install.',
               draft: false,
               prerelease: false
-            })
-            return data.id
+            });
+            return data.id;
 
   build-macos-windows:
     needs: create-release