ci(cypress): Surface tests that needed retries in the job summary

Cypress saves a screenshot for every failed attempt, also when a retry
passed afterwards. Listing them in the job summary keeps flaky tests
visible even when the run ends green, instead of retries silently
masking them.

Assisted-by: ClaudeCode:claude-fable-5
Signed-off-by: David Dreschner <david.dreschner@nextcloud.com>

Author: DerDreschner

.github/workflows/cypress.yml

@@ -195,6 +195,24 @@ jobs:
           SPLIT_RANDOM_SEED: ${{ github.run_id }}
           SETUP_TESTING: ${{ matrix.containers == 'setup' && 'true' || '' }}
 
+      - name: Report tests with failed attempts
+        # Local addition (not in the org template): cypress saves a screenshot
+        # for every failed attempt, also when a retry passed afterwards - list
+        # them, so flaky tests stay visible even when the run is green.
+        if: always() && matrix.containers != 'component'
+        env:
+          RUNNER_ID: ${{ matrix.containers }}
+        run: |
+          flaky=$(find cypress/snapshots -name '*(failed)*.png' 2>/dev/null | sed -e 's|^cypress/snapshots/actual/||' -e 's|\.png$||' | sort)
+          if [ -n "$flaky" ]; then
+            {
+              echo "### ⚠️ Tests with failed attempts (runner $RUNNER_ID)"
+              echo '```'
+              echo "$flaky"
+              echo '```'
+            } >> "$GITHUB_STEP_SUMMARY"
+          fi
+
       - name: Upload snapshots and videos
         uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         if: always()