Fix web/frontend compat bugs in managed config & runtime status
- Preserve [[peer]].peer_public_key when TOML configs round-trip
through the web/managed NetworkConfig path
- Keep old peer_urls clients working while adding structured peer
metadata for new clients
- Make frontend protobuf JSON normalization preserve omitted-field
semantics instead of turning missing data into misleading defaults
- Harden runtime status rendering against omitted or string-encoded
backend fields
- Expose peer-route feature flags in the web status UI
* refactor(gui): refactor gui to use RemoteClient trait and RemoteManagement component
* feat(gui): Add network config saving and refactor RemoteManagement
* add method to create NetworkConfig from TomlConfigLoader
* allow web export/import toml config file and gui edit toml config
* Extract the configuration file dialog into a separate component and allow direct editing of the configuration file on the web
KKRainbow