New two-step config flow: POST /config saves desired state to
config/firewall/config.json, GET /config/pending diffs against live
firewalld state, POST /config/apply synchronizes live state. Adds target
normalization helpers and full test coverage for config CRUD and pending
diff logic.
- dashboard.html: Fix zones, leases, wg_status, cert key names, add services var
- server.py: Pass services to dashboard template via _get_service_status()
- lib/acme.py: Fix dead third date format (%Y%m%d%H%M%z) using astimezone(UTC)
- lib/wireguard.py: Add -- separator to cp command to match sudoers rule
- lib/nginx.py: Replace shallow dict.copy() with {**...} for DEFAULT_SSL
- AGENTS.md: Update test count 149 -> 154
- docs/api.md: Rename cert field expiry -> expires_at
mteehan