Refactored and documented the HTTP API

server/src/http/chat.rs

@@ -1,14 +1,22 @@
 use crate::http::context::{AppContext, OpenApiResult, bad_request};
 use crate::llm::chat;
-use poem_openapi::{OpenApi, payload::Json};
+use poem_openapi::{OpenApi, Tags, payload::Json};
 use std::sync::Arc;
 
+#[derive(Tags)]
+enum ChatTags {
+    Chat,
+}
+
 pub struct ChatApi {
     pub ctx: Arc<AppContext>,
 }
 
-#[OpenApi]
+#[OpenApi(tag = "ChatTags::Chat")]
 impl ChatApi {
+    /// Cancel the currently running chat stream, if any.
+    ///
+    /// Returns `true` once the cancellation signal is issued.
     #[oai(path = "/chat/cancel", method = "post")]
     async fn cancel_chat(&self) -> OpenApiResult<Json<bool>> {
         chat::cancel_chat(&self.ctx.state).map_err(bad_request)?;