update

docs/architecture.md

@@ -110,24 +110,37 @@ env = smartreceive(msg; fileserver_download_handler=_fetch_with_backoff, max_ret
 ## Architecture Diagram
 
 ```mermaid
-flowchart TD
-    subgraph Client
-        App[Julia Application]
+flowchart TB
+    subgraph Sender["Julia Application (Sender)"]
+        SenderApp[App Code]
+        NATSBridge_Send[NATSBridge]
+        NATS_Client[<b>NATS.jl</b>]
     end
 
-    subgraph Server
-        Julia[Julia Service]
-        NATS[NATS Server]
-        FileServer[HTTP File Server]
+    subgraph Receiver["Julia Application (Receiver)"]
+        ReceiverApp[App Code]
+        NATSBridge_Recv[NATSBridge]
+        NATS_Client_Recv[<b>NATS.jl</b>]
     end
 
-    App -->|NATS| NATS
-    NATS -->|NATS| Julia
-    Julia -->|NATS| NATS
-    Julia -->|HTTP POST| FileServer
+    subgraph Infrastructure["Infrastructure"]
+        NATS[<b>NATS Server</b><br/>Message Broker]
+        FileServer[<b>HTTP File Server</b><br/>Upload/Download]
+    end
 
-    style App fill:#e8f5e9
-    style Julia fill:#e8f5e9
+    SenderApp --> NATSBridge_Send
+    NATSBridge_Send --> NATS_Client
+    NATS_Client --> NATS
+    
+    NATS --> NATS_Client_Recv
+    NATS_Client_Recv --> NATSBridge_Recv
+    NATSBridge_Recv --> ReceiverApp
+
+    NATSBridge_Send -.->|HTTP POST upload| FileServer
+    FileServer -.->|HTTP GET download| NATSBridge_Recv
+
+    style SenderApp fill:#e8f5e9
+    style ReceiverApp fill:#e8f5e9
     style NATS fill:#fff3e0
     style FileServer fill:#f3e5f5
 ```