fix(custom-cli): affichage conversation stable au second tour — dédup du prompt et scope de progression par tour, sans reliquats du tour précédent — #251 (QA verte)

frontend/src/features/agents/CustomAgentChatView.tsx

@@ -236,24 +236,31 @@ function appendUserPrompt(
   text: string,
   attachments: string[] = [],
   receivedAtMs = Date.now(),
-): ChatTurn[] {
-  const last = turns[turns.length - 1];
-  if (
-    last?.role === "user" &&
-    last.text === text &&
-    JSON.stringify(last.attachments ?? []) === JSON.stringify(attachments)
-  ) {
-    return turns;
+): { turns: ChatTurn[]; appended: boolean } {
+  for (let index = turns.length - 1; index >= 0; index -= 1) {
+    const turn = turns[index];
+    if (turn.role === "final" || turn.role === "error") break;
+    if (turn.role !== "user") continue;
+    if (
+      turn.text === text &&
+      JSON.stringify(turn.attachments ?? []) === JSON.stringify(attachments)
+    ) {
+      return { turns, appended: false };
+    }
+    break;
   }
-  return [
-    ...turns,
-    {
-      role: "user",
-      text,
-      receivedAtMs,
-      ...(attachments.length > 0 ? { attachments } : {}),
-    },
-  ];
+  return {
+    turns: [
+      ...turns,
+      {
+        role: "user",
+        text,
+        receivedAtMs,
+        ...(attachments.length > 0 ? { attachments } : {}),
+      },
+    ],
+    appended: true,
+  };
 }
 
 function isReplyProgressSource(value: unknown): value is ReplyProgressSource {
@@ -775,14 +782,6 @@ function foldChunk(
     if (isRecoverableNoResponseTurn(last) && raw.kind !== "error") {
       return foldChunk({ ...state, turns: turns.slice(0, -1) }, raw, receivedAtMs);
     }
-    if (raw.kind === "progress") {
-      return appendProgress(state, normalizeProgress(raw.progress) ?? {
-        source: "ideaLocal",
-        kind: "other",
-        stage: "info",
-        label: unknownChunkLabel(raw),
-      });
-    }
     return state;
   }
   switch (raw.kind) {
@@ -838,17 +837,21 @@ function foldChunk(
       return { ...completedState, turns: next };
     }
     case "userPrompt":
-    case "UserPrompt":
+    case "UserPrompt": {
+      const appended = appendUserPrompt(
+        turns,
+        String(raw.text ?? raw.prompt ?? ""),
+        attachmentLabels(raw.attachments),
+        receivedAtMs,
+      );
       return {
         ...state,
-        turns: appendUserPrompt(
-          turns,
-          String(raw.text ?? raw.prompt ?? ""),
-          attachmentLabels(raw.attachments),
-          receivedAtMs,
-        ),
-        progressScope: state.progressScope + 1,
+        turns: appended.turns,
+        progressScope: appended.appended
+          ? state.progressScope + 1
+          : state.progressScope,
       };
+    }
     default:
       return {
         ...state,