When the model dropdown sends a prefixed ID like "anthropic/claude-xxx",
AIAgent interprets the provider/model format as an OpenRouter path and
routes through OpenRouter instead of the direct Anthropic API.
Fix: read the configured provider from config.yaml model section. If
the model ID starts with the configured provider name followed by "/",
strip that prefix and pass the provider explicitly to AIAgent. This
ensures direct API providers (Anthropic, OpenAI, etc.) are used when
configured, regardless of the model ID format from the dropdown.
When Hermes WebUI runs behind a reverse proxy with HTTP basic auth
(e.g. Caddy basic_auth), browsers embed credentials in the page URL.
The Fetch API and EventSource reject requests constructed from URLs
that include credentials (per Fetch spec, all modern browsers).
Fix: construct all fetch() and EventSource URLs via
new URL(path, location.origin) which strips credentials from the
base URL. Add credentials:"include" to ensure auth headers are
forwarded on each request.
