fix: surface ai agent final replies

src-tauri/src/opencode_events_tests.rs

@@ -25,6 +25,32 @@ fn dispatch_maps_session_reasoning_and_text() {
     ));
 }
 
+#[test]
+fn dispatch_maps_part_backed_reasoning_and_text() {
+    let mut events = Vec::new();
+    let reasoning = serde_json::json!({
+        "type": "reasoning",
+        "part": { "type": "reasoning", "text": "Checking links" }
+    });
+    let text = serde_json::json!({
+        "type": "text",
+        "part": { "type": "text", "text": "Done from OpenCode" }
+    });
+
+    for event in [reasoning, text] {
+        dispatch_event(&event, &mut |event| events.push(event));
+    }
+
+    assert!(matches!(
+        &events[0],
+        AiAgentStreamEvent::ThinkingDelta { text } if text == "Checking links"
+    ));
+    assert!(matches!(
+        &events[1],
+        AiAgentStreamEvent::TextDelta { text } if text == "Done from OpenCode"
+    ));
+}
+
 #[test]
 fn dispatch_maps_tool_events() {
     let mut events = Vec::new();
@@ -51,6 +77,40 @@ fn dispatch_maps_tool_events() {
     ));
 }
 
+#[test]
+fn dispatch_maps_part_backed_tool_events() {
+    let mut events = Vec::new();
+    let tool_start = serde_json::json!({
+        "type": "tool_use",
+        "part": {
+            "id": "prt_tool_1",
+            "tool": "read",
+            "input": { "path": "Note.md" }
+        }
+    });
+    let tool_done = serde_json::json!({
+        "type": "tool_result",
+        "part": {
+            "id": "prt_tool_1",
+            "output": "ok"
+        }
+    });
+
+    dispatch_event(&tool_start, &mut |event| events.push(event));
+    dispatch_event(&tool_done, &mut |event| events.push(event));
+
+    assert!(matches!(
+        &events[0],
+        AiAgentStreamEvent::ToolStart { tool_name, tool_id, input }
+            if tool_name == "read" && tool_id == "prt_tool_1" && input.as_deref() == Some(r#"{"path":"Note.md"}"#)
+    ));
+    assert!(matches!(
+        &events[1],
+        AiAgentStreamEvent::ToolDone { tool_id, output }
+            if tool_id == "prt_tool_1" && output.as_deref() == Some("ok")
+    ));
+}
+
 #[test]
 fn format_error_explains_missing_auth_or_provider_setup() {
     let message = format_error(