- Move Client/Http, Services, Parsers under Infrastructure/ (Client, Services, Parsers)
- Move config helpers (DnsmasqConfKeys, DnsmasqOptionTooltips, DnsmasqFileEncoding, EffectiveConfigFieldBuilder) to Infrastructure/Helpers/Config; ApiJsonOptions to Helpers/Http
- Move Configuration types (ApplicationOptions, DnsmasqOptions, DnsmasqOptionsValidator) to Models/Config
- Merge Models/Status and Models/EffectiveConfig into Models/Dnsmasq and Models/Dnsmasq/EffectiveConfig
- Move Client/Models and Client/Services to Models/Client and Infrastructure/Services
- Move ConfigSetSnapshot, HostsSnapshot, ProcessRunResult, ManagedConfigContent from Infrastructure/Services/Abstractions to Models/Contracts
- Update all namespaces and usings; tests pass
- Managed hosts file (zz-dnsmasq-webui.hosts): app reads/writes only this;
addn-hosts in managed config loads it. SystemHostsPath is read-only display.
- Hosts page: editable managed file; then 'Other hosts (read-only)' (system
hosts when configured and !no-hosts, plus addn-hosts excluding managed).
- GET api/hosts/readonly for read-only files; no-hosts hides system hosts.
- HostsFileSection.razor component; fix space before read-only badge.
- Test harness: show container /etc/hosts (default SystemHostsPath).
- Config parsing/sources, tests and client updates for new hosts model.
alex