chore(rpc): add explanation comments

rpc/src/core/webview.ts

@@ -164,6 +164,8 @@ export class RPCInstanceWebview extends RPCInstanceBase {
 			},
 			body: stringify(data),
 		}
+		// FiveM injects GetParentResourceName into NUI pages. Without it (page
+		// opened in a regular browser) the fetch fails and the call rejects.
 		const resourceName = window?.GetParentResourceName?.() ?? 'nui-frame-app'
 		return fetch(
 			`https://${resourceName}/${RPCEvents.LISTENER_WEB}`,

rpc/src/utils/funcs.ts

@@ -64,7 +64,14 @@ export function stringifyWeb(data: RPCStateWeb): RPCStateWebRaw {
 	return JSON.stringify(data) as RPCStateWebRaw
 }
 
-/** **Internal** */
+/**
+ * **Internal**
+ *
+ * UUID v4 shaped call id. Not `crypto.randomUUID`: the FiveM client runtime
+ * has no `crypto` global, and one generator serves all environments. Only
+ * pairs a response with its call, so it need not be unguessable: the server
+ * binds each call to its target player (`Pending` peer check).
+ */
 export function generateUUID(): string {
 	let uuid = ''
 	let random = 0