fix: address PR review comments for codex parser

Author: jhlee0409

src-tauri/src/providers/codex.rs

@@ -1633,6 +1633,23 @@ mod tests {
         );
     }
 
+    #[test]
+    fn convert_agent_reasoning_event_skips_empty_text() {
+        let mut counter = 0u64;
+        let msg = convert_codex_event(
+            &json!({
+                "type": "agent_reasoning",
+                "text": "   "
+            }),
+            "session-1",
+            "2026-02-19T12:00:00Z",
+            &mut counter,
+        );
+
+        assert!(msg.is_none());
+        assert_eq!(counter, 0);
+    }
+
     #[test]
     fn convert_agent_message_event_to_assistant_text_message() {
         let mut counter = 0u64;
@@ -1660,6 +1677,22 @@ mod tests {
         );
     }
 
+    #[test]
+    fn convert_agent_message_event_skips_missing_field() {
+        let mut counter = 0u64;
+        let msg = convert_codex_event(
+            &json!({
+                "type": "agent_message"
+            }),
+            "session-1",
+            "2026-02-19T12:00:00Z",
+            &mut counter,
+        );
+
+        assert!(msg.is_none());
+        assert_eq!(counter, 0);
+    }
+
     #[test]
     fn convert_user_message_event_to_user_text_message() {
         let mut counter = 0u64;

src/components/MessageViewer/components/ClaudeMessageNode.tsx

@@ -196,7 +196,11 @@ export const ClaudeMessageNode = React.memo(({
   }
 
   // File history snapshot messages
-  if (message.type === "file-history-snapshot" && message.snapshot) {
+  if (message.type === "file-history-snapshot") {
+    if (!message.snapshot) {
+      return null;
+    }
+
     return (
       <div
         data-message-uuid={message.uuid}
@@ -208,7 +212,7 @@ export const ClaudeMessageNode = React.memo(({
         {CaptureHideButton}
         <div className="max-w-4xl mx-auto">
           <FileHistorySnapshotRenderer
-            messageId={message.messageId ?? ""}
+            messageId={message.messageId ?? message.uuid}
             snapshot={message.snapshot}
             isSnapshotUpdate={Boolean(message.isSnapshotUpdate)}
           />