change MsgHandlerError

AI_prompt.md

@@ -176,3 +176,68 @@ my server REST API endpoint is sommpanion.yiem.cc/agent-fronent/api/v1/chat but
 I just placed my custom package for encode and decode message at ./src/msghandler.rs. smartsend() is for encoding and smartreceive() is for decoding. 
 you may also check the file /home/ton/docker-apps/sommpanion/msghandler/docs/walkthrough.md for more info about my package.
 You can test whether Dioxus webapp can be build using this command "dx bundle --web --release --debug-symbols=false" 
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+I want to build similar webapp.
+My app should be built as client-side-rendering Dioxus-based (version 0.7+).
+I already build backend server and I intend to communicate with the webapp using json string that encode the following message envelop:
+{
+  "correlation_id": "a1b2c3d4...",
+  "msg_id": "e5f6g7h8...",
+  "timestamp": "2026-03-13T16:30:00.000Z",
+  "send_to": "",
+  "msg_purpose": "chat",
+  "sender_name": "chat-webapp",
+  "sender_id": "sender-uuid...",
+  "receiver_name": "agent-backend",
+  "receiver_id": "",
+  "reply_to": "",
+  "reply_to_msg_id": "",
+  "broker_url": "myservice.mydomain.com/subservice/api/v1/chat",
+  "metadata": {},
+  "payloads": [
+    {
+      "id": "payload-uuid...",
+      "dataname": "msg",
+      "payload_type": "text",
+      "transport": "direct",
+      "encoding": "base64",
+      "size": 20,
+      "data": "SGVsbG8hIEknIHRlbCB5b3UgSW4gZW5nbGlzaC4=",
+      "metadata": {"payload_bytes": 20}
+    },
+    {
+      "id": "payload-uuid...",
+      "dataname": "avatar",
+      "payload_type": "image",
+      "transport": "direct",
+      "encoding": "base64",
+      "size": 150000,
+      "data": "iVBORw0KGgoAAAANSUhEUgAA...",
+      "metadata": {"payload_bytes": 150000}
+    },
+    {
+      ...,
+      "payload_type": "text",
+      ...,
+    },
+    ...
+  ]
+}
+---
+I already have Rust file named msghandler.rs containing the following functions for the webapp to use:
+- smartsend() to encode the above message envelop into json string.
+- smartreceive() to decode json string back to message envelop.
+- the msghandler.rs walkthrough is at /home/ton/docker-apps/sommpanion/msghandler/docs/walkthrough.md
+The backend server REST API endpoint is "myservice.mydomain.com/subservice/api/v1/chat". I didn't run the server yet. 
+I already setup the project structure but you can modify the folder as you see fit. Can you implement the app? Use this command "dx bundle --web --release --debug-symbols=false" to check whether the project can be build.
+P.S. AI_prompt.md is for me to use. do not read.
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