fix: render opencode text parts after tools

src-tauri/src/opencode_events.rs

@@ -19,7 +19,7 @@ where
         emit_session_event(json, emit);
     }
 
-    match json["type"].as_str().unwrap_or_default() {
+    match event_type(json) {
         "message" | "text" => emit_text(json, emit),
         "reasoning" => emit_reasoning(json, emit),
         "tool_use" | "tool" => emit_tool_start(json, emit),
@@ -29,6 +29,15 @@ where
     }
 }
 
+fn event_type(json: &serde_json::Value) -> &str {
+    let direct = json["type"].as_str().unwrap_or_default();
+    match direct {
+        "session" | "message" | "text" | "reasoning" | "tool_use" | "tool" | "tool_result"
+        | "tool_done" | "error" => direct,
+        _ => json["part"]["type"].as_str().unwrap_or(direct),
+    }
+}
+
 pub(crate) fn session_id(json: &serde_json::Value) -> Option<&str> {
     json["sessionID"]
         .as_str()

src-tauri/src/opencode_events_tests.rs

@@ -107,6 +107,53 @@ fn dispatch_maps_part_backed_reasoning_and_text() {
     ));
 }
 
+#[test]
+fn dispatch_maps_final_text_after_tool_part_wrappers() {
+    let events = dispatch_events([
+        serde_json::json!({
+            "type": "part",
+            "part": {
+                "id": "prt_tool_1",
+                "type": "tool",
+                "tool": "webfetch",
+                "input": { "url": "https://example.com" }
+            }
+        }),
+        serde_json::json!({
+            "type": "part",
+            "part": {
+                "id": "prt_text_1",
+                "type": "text",
+                "text": "Final answer after tool output."
+            }
+        }),
+        serde_json::json!({
+            "type": "part",
+            "part": {
+                "id": "prt_finish_1",
+                "type": "step-finish",
+                "reason": "stop"
+            }
+        }),
+    ]);
+
+    assert!(matches!(
+        &events[0],
+        AiAgentStreamEvent::ToolStart {
+            tool_name,
+            tool_id,
+            input,
+        } if tool_name == "webfetch"
+            && tool_id == "prt_tool_1"
+            && input.as_deref() == Some(r#"{"url":"https://example.com"}"#)
+    ));
+    assert!(matches!(
+        &events[1],
+        AiAgentStreamEvent::TextDelta { text } if text == "Final answer after tool output."
+    ));
+    assert_eq!(events.len(), 2);
+}
+
 #[test]
 fn dispatch_maps_tool_events() {
     let direct = dispatch_events([