[Copilot]

The OHOS unsigned hap / Build unsigned hap job was failing before build steps due to intermittent package integrity mismatches from the configured pub mirror (pub.flutter-io.cn). This change keeps the normal mirror path but adds a targeted fallback so release jobs can proceed when that specific mirror failure occurs.

• Problem scope

  • Failure occurred in Resolve dependencies (flutter pub get) with wrong content-hash, causing the OHOS workflow to abort before Build unsigned hap.

• Workflow change (.github/workflows/ohos-release.yml)

  • Switched dependency resolution to flutter pub get --enforce-lockfile.
  • Wrapped the step in failure-aware logic:
    • first attempt uses current mirror configuration (unchanged default behavior),
    • if logs contain wrong content-hash, retry once with PUB_HOSTED_URL=https://pub.dev,
    • otherwise fail as before.

• Why this is minimal

  • No changes to build scripts, release asset flow, or other platform workflows.
  • Behavior changes only on the known integrity-mismatch error signature.

- name: Resolve dependencies
  run: |
    log_file="$(mktemp)"
    if flutter pub get --enforce-lockfile 2>&1 | tee "$log_file"; then
      exit 0
    fi
    if grep -q 'wrong content-hash' "$log_file"; then
      PUB_HOSTED_URL=https://pub.dev flutter pub get --enforce-lockfile
      exit 0
    fi
    exit 1