Naming, layout and comments: descriptive full-word names, one item per line in wrapped calls and literals, and doc comments on exported names

Short and single-letter names in application code become full words (tests
keep theirs). Wrapped calls, signatures and composite literals put one item
per line, and one-line function bodies are expanded. Exported names and
groups of constants get doc comments, and comments refer to the renamed
identifiers.

internal/websocket/http.go

@@ -30,16 +30,16 @@ func (h *Hub) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 	ip := middleware.ClientIP(r)
 	ctx, cancel := context.WithCancel(r.Context())
-	c := newClient(h, conn, ip, cancel)
+	client := newClient(h, conn, ip, cancel)
 
-	if !h.register(c) {
+	if !h.register(client) {
 		cancel()
 		conn.Close(ws.StatusGoingAway, "server shutting down") //nolint:errcheck,gosec // turned away
 		return
 	}
-	defer h.unregister(c)
+	defer h.unregister(client)
 
-	h.logger().Info("client connected", "client", c.id, "ip", ip)
-	c.run(ctx)
-	h.logger().Info("client disconnected", "client", c.id, "ip", ip)
+	h.logger().Info("client connected", "client", client.id, "ip", ip)
+	client.run(ctx)
+	h.logger().Info("client disconnected", "client", client.id, "ip", ip)
 }