Ignore replayed tool starts

app/androidApp/src/main/kotlin/com/example/aiapp/TranscriptItems.kt

@@ -433,16 +433,24 @@ fun foldEvent(items: List<TranscriptItem>, entry: SeqEvent): List<TranscriptItem
             }
         }
         is SessionEvent.ToolStart ->
-            items +
-                TranscriptItem.ToolRun(
-                    entry.seq,
-                    event.id,
-                    runIdFor(items, event.id, event.tool),
-                    event.tool,
-                    event.input,
-                    "",
-                    done = false,
-                )
+            // A call id names one call for its whole lifetime. Codex can repeat the start while
+            // recovering an in-flight item; appending that replay made two rows with one key, and
+            // Compose aborts the entire LazyColumn when it encounters them. Ignoring the replay
+            // also repairs transcripts which already contain it when they are folded on reopen.
+            if (items.any { it is TranscriptItem.ToolRun && it.id == event.id }) {
+                items
+            } else {
+                items +
+                    TranscriptItem.ToolRun(
+                        entry.seq,
+                        event.id,
+                        runIdFor(items, event.id, event.tool),
+                        event.tool,
+                        event.input,
+                        "",
+                        done = false,
+                    )
+            }
         is SessionEvent.ToolUpdate -> updateTool(items, event.id) { it.copy(output = event.output) }
         is SessionEvent.ToolEnd ->
             // Created when its start is not here, rather than dropped. A fold that only ever