updater fixed

src/main/update-service.cjs

@@ -279,7 +279,7 @@ class UpdateService {
       ));
     if (!release || release.draft || release.prerelease) {
       const error = new Error(
-        `ForgeFlow ${update.remoteVersion} has no published binary release yet.`,
+        `ForgeFlow ${update.remoteVersion} has no published binary release yet. The source branch was updated, but the matching Windows installer/portable assets were not published. Run Publish-Missing-Binary-Release.ps1 from the release source or publish the four required assets in Gitea.`,
       );
       error.code = "BINARY_RELEASE_NOT_FOUND";
       throw error;
@@ -305,18 +305,29 @@ class UpdateService {
         update.repo,
         release.id,
         asset.id,
+        { downloadUrl: asset.browser_download_url },
       ),
       this.gitea.downloadReleaseAsset(
         update.owner,
         update.repo,
         release.id,
         checksumAsset.id,
+        { downloadUrl: checksumAsset.browser_download_url },
       ),
     ]);
     if (binary.length < 1_000_000 || binary[0] !== 0x4d || binary[1] !== 0x5a) {
-      throw new Error(
-        "The downloaded Windows update is not a valid executable.",
+      const preview = binary.subarray(0, 200).toString("utf8").trim();
+      const looksLikeMetadata =
+        /^\s*[{[]/.test(preview) || /browser_download_url/i.test(preview);
+      const error = new Error(
+        looksLikeMetadata
+          ? "Gitea returned release-asset metadata instead of the Windows executable. Upgrade ForgeFlow with the 0.9.1 installer once; later in-app updates use the actual browser download URL."
+          : "The downloaded Windows update is not a valid executable.",
       );
+      error.code = looksLikeMetadata
+        ? "RELEASE_ASSET_METADATA_RECEIVED"
+        : "INVALID_WINDOWS_UPDATE";
+      throw error;
     }
     const expectedSha256 = checksumBytes
       .toString("utf8")