test(swiftui): retry review-toggle keystroke in ReviewSplitScene

The space keystroke can lose the key-focus race on cold CI runners, which
the old test masked by asserting nothing after it.
fix(ci): give the release-assets job a repo context for gh

The job has no checkout, so gh release upload failed with 'not a git
repository' on the first real release run; GH_REPO makes the target
explicit. The v0.3.4 AppImages were uploaded manually from the run's
artifacts.

Author: hewigovens

.github/workflows/appimage.yml

@@ -123,6 +123,8 @@ jobs:
       - name: Upload release asset
         env:
           GH_TOKEN: ${{ github.token }}
+          # No checkout in this job, so gh needs the repo made explicit.
+          GH_REPO: ${{ github.repository }}
           TAG_NAME: ${{ github.event.release.tag_name }}
         run: |
           ls -lh dist/appimage

shell/mac/Tests/JayJayUITests/Scenes/ReviewSplitScene.swift

@@ -11,12 +11,18 @@ final class ReviewSplitScene: SceneBase {
 
         files.element(boundBy: 0).click()
         keyStroke(.space)
-        XCUIElement.perform(withKeyModifiers: .shift) {
-            files.element(boundBy: 1).click()
-        }
 
+        // Space can lose the key-focus race on cold CI runners; re-focus the row and retry once.
         let splitButton = app.buttons[AID.SplitSheet.openButton]
+        if !splitButton.waitForExistence(timeout: 3) {
+            files.element(boundBy: 0).click()
+            keyStroke(.space)
+        }
         XCTAssertTrue(splitButton.waitForExistence(timeout: 5), "Split toolbar button did not appear")
+
+        XCUIElement.perform(withKeyModifiers: .shift) {
+            files.element(boundBy: 1).click()
+        }
         splitButton.click()
 
         let messageField = app.textFields[AID.SplitSheet.messageField]