Tasks

• [x] Audit the existing gallery and define independent scope.
• [x] Add failing screenshot comparison/report regressions.
• [x] Implement a before/after viewer linked to local PNGs and preserve pre-update baselines.
• [x] Add report-only Task workflow and document generated artifacts.
• [x] Verify offline browser behavior, controls, mobile layout and repository checks.
• [x] Replace network-idle navigation for map snapshots with explicit content readiness; add browser coverage for a pending background request and delayed result/map rendering to task snapshot:verify.
• [x] Commit, push and open a separate PR with screenshot evidence: PR #244.