diff --git a/frontend/src/features/agents/CustomAgentChatView.test.tsx b/frontend/src/features/agents/CustomAgentChatView.test.tsx
index 113b1753..6c9e46a3 100644
--- a/frontend/src/features/agents/CustomAgentChatView.test.tsx
+++ b/frontend/src/features/agents/CustomAgentChatView.test.tsx
@@ -252,6 +252,17 @@ describe("CustomAgentChatView", () => {
         scrollback: [],
       })),
       sendAgentChat: vi.fn(async (_sessionId: string, _prompt: string, onChunk) => {
+        onChunk({
+          kind: "progress",
+          progress: {
+            source: "providerNative",
+            kind: "turn",
+            stage: "started",
+            label: "turn.started",
+            provider: "codex",
+            nativeEvent: "turn.started",
+          },
+        });
         onChunk({
           kind: "progress",
           progress: {
@@ -285,6 +296,17 @@ describe("CustomAgentChatView", () => {
             toolName: "idea_ask_agent",
           },
         });
+        onChunk({
+          kind: "progress",
+          progress: {
+            source: "providerNative",
+            kind: "turn",
+            stage: "completed",
+            label: "turn.completed",
+            provider: "codex",
+            nativeEvent: "turn.completed",
+          },
+        });
         onChunk({ kind: "final", content: "done" });
       }),
       cancelAgentChat: vi.fn(async () => {}),
@@ -326,13 +348,19 @@ describe("CustomAgentChatView", () => {
     fireEvent.click(screen.getByRole("button", { name: "Envoyer" }));
 
     await screen.findByText("Progress");
+    expect(screen.getAllByTestId("chat-turn-marker")).toHaveLength(2);
+    expect(screen.getByText("turn.started")).toBeTruthy();
+    expect(screen.getByText("turn.completed")).toBeTruthy();
+    expect(screen.getByText("Progress").closest("[data-testid='chat-progress-status']")).toBeTruthy();
     expect(screen.getByText("Analyse")).toBeTruthy();
     expect(screen.getByText("Lecture du contexte disponible.")).toBeTruthy();
     expect(screen.getByText("MCP")).toBeTruthy();
+    expect(screen.getByText("MCP").closest("[data-testid='chat-tool-progress']")).toBeTruthy();
     expect(screen.getByText("idea_ticket_read")).toBeTruthy();
-    expect(screen.getByText("Délégation")).toBeTruthy();
-    expect(screen.getByText("target=QA task=Valider le rendu progress")).toBeTruthy();
-    await screen.findByText("done");
+    expect(screen.getByText("Demande à QA")).toBeTruthy();
+    expect(screen.getByText("Demande à QA").closest("[data-testid='chat-tool-progress']")).toBeTruthy();
+    expect(screen.getByText("Valider le rendu progress")).toBeTruthy();
+    expect((await screen.findAllByText("done")).length).toBeGreaterThan(0);
   });
 
   it("renders available pre-MCP progress before the first MCP card", async () => {
@@ -529,8 +557,9 @@ describe("CustomAgentChatView", () => {
     });
 
     await screen.findByText("done");
-    expect(screen.getAllByText("Délégation")).toHaveLength(2);
-    expect(screen.getByText("target=QA task=validate")).toBeTruthy();
+    expect(screen.getByText("Demande à QA")).toBeTruthy();
+    expect(screen.getByText("validate")).toBeTruthy();
+    expect(screen.getByText("Appel inter-agent")).toBeTruthy();
     expect(screen.getByText("reply delivered")).toBeTruthy();
     expect(screen.queryByText("Tool")).toBeNull();
     await waitFor(() =>
diff --git a/frontend/src/features/agents/CustomAgentChatView.tsx b/frontend/src/features/agents/CustomAgentChatView.tsx
index 5b8cb14f..44765212 100644
--- a/frontend/src/features/agents/CustomAgentChatView.tsx
+++ b/frontend/src/features/agents/CustomAgentChatView.tsx
@@ -204,10 +204,6 @@ function isDelegationProgress(progress: ReplyProgress): boolean {
   return name === "idea_ask_agent" || name === "idea_ask_agents";
 }
 
-function isToolLikeProgress(progress: ReplyProgress): boolean {
-  return progress.kind === "tool" || progress.kind === "mcp" || isDelegationProgress(progress);
-}
-
 function progressEntityKey(progress: ReplyProgress): string | null {
   const name = normalizedProgressToolName(progress);
   if (!name) return null;
@@ -217,7 +213,7 @@ function progressEntityKey(progress: ReplyProgress): string | null {
 }
 
 function progressStageBucket(progress: ReplyProgress): string {
-  if (!isToolLikeProgress(progress)) return progress.stage;
+  if (!isCenteredToolProgress(progress)) return progress.stage;
   if (progress.stage === "started" || progress.stage === "delta") return "started";
   if (progress.stage === "completed") return "completed";
   return "info";
@@ -255,6 +251,7 @@ function completeRunningProgress(turns: ChatTurn[]): ChatTurn[] {
   return turns.map((turn) => {
     if (
       turn.role !== "progress" ||
+      turn.progress.kind === "turn" ||
       (turn.progress.stage !== "started" && turn.progress.stage !== "delta")
     ) {
       return turn;
@@ -1316,9 +1313,9 @@ function ChatBubble({ turn }: { turn: ChatTurn }) {
   }
   if (turn.role === "final") {
     return (
-      <div className="flex min-w-0 justify-end">
-        <div className="min-w-0 max-w-[86%] overflow-hidden rounded-md border border-success/50 bg-success/10 px-3 py-2 text-sm text-content">
-          <div className="mb-1 text-xs font-semibold text-success">Task Complete</div>
+      <div className="flex min-w-0 justify-start">
+        <div className="min-w-0 max-w-[82%] overflow-hidden rounded-md border border-success/50 bg-success/10 px-3 py-2 text-sm text-content">
+          <div className="mb-1 text-xs font-semibold text-success">Terminé</div>
           <p className="whitespace-pre-wrap break-words">{turn.text}</p>
         </div>
       </div>
@@ -1337,7 +1334,7 @@ function ChatBubble({ turn }: { turn: ChatTurn }) {
 
   const user = turn.role === "user";
   return (
-    <div className={cn("flex min-w-0", user ? "justify-start" : "justify-end")}>
+    <div className="flex min-w-0 justify-start">
       <div
         className={cn(
           "min-w-0 max-w-[82%] overflow-hidden rounded-lg border px-3 py-2 text-sm text-content",
@@ -1405,8 +1402,127 @@ function progressTone(progress: ReplyProgress): string {
   return "border-border/80 bg-surface/70 text-muted";
 }
 
-function truncateProgressText(text: string): string {
-  return text.length > 140 ? `${text.slice(0, 137)}...` : text;
+function isCenteredToolProgress(progress: ReplyProgress): boolean {
+  return (
+    progress.kind === "tool" ||
+    progress.kind === "mcp" ||
+    isDelegationProgress(progress)
+  );
+}
+
+function isTimelineProgress(progress: ReplyProgress): boolean {
+  return progress.kind === "turn";
+}
+
+function compactToolName(progress: ReplyProgress): string {
+  return progress.toolName ?? progress.label;
+}
+
+function truncateText(text: string, max = 140): string {
+  const flat = text.replace(/\s+/g, " ").trim();
+  return flat.length > max ? `${flat.slice(0, max - 3)}...` : flat;
+}
+
+function parseKeyValue(text: string, key: string): string | null {
+  const match = new RegExp(
+    `(?:^|\\s)${key}=([^\\n]+?)(?=\\s\\w+=|$)`,
+    "i",
+  ).exec(text);
+  return match?.[1]?.trim().replace(/^["']|["']$/g, "") || null;
+}
+
+function delegationSummary(progress: ReplyProgress): {
+  target: string | null;
+  excerpt: string | null;
+} {
+  const text = progress.text ?? "";
+  const target = parseKeyValue(text, "target");
+  const task = parseKeyValue(text, "task");
+  const fallback = text && !target && !task ? text : null;
+  return {
+    target,
+    excerpt: task
+      ? truncateText(task, 92)
+      : fallback
+        ? truncateText(fallback, 92)
+        : null,
+  };
+}
+
+const fourLineClamp = {
+  display: "-webkit-box",
+  WebkitBoxOrient: "vertical",
+  WebkitLineClamp: 4,
+} as const;
+
+function TurnMarker({ progress }: { progress: ReplyProgress }) {
+  const stage = progressStageLabel(progress.stage);
+  const label = progress.label.trim() || "Tour";
+  return (
+    <div data-testid="chat-turn-marker" className="flex min-w-0 justify-center">
+      <div className="flex max-w-[72%] items-center gap-2 overflow-hidden text-[11px] text-muted">
+        <span className="h-px w-8 shrink-0 bg-border" aria-hidden />
+        <span className="shrink-0 rounded-full border border-border bg-surface px-2 py-0.5">
+          {stage}
+        </span>
+        <span className="truncate">{label}</span>
+        <span className="h-px w-8 shrink-0 bg-border" aria-hidden />
+      </div>
+    </div>
+  );
+}
+
+function ToolProgressCard({
+  progress,
+  settled,
+}: {
+  progress: ReplyProgress;
+  settled: boolean;
+}) {
+  const running = !settled && (progress.stage === "started" || progress.stage === "delta");
+  const stage = progressStageLabel(progress.stage);
+  const detail =
+    progress.text && !isDelegationProgress(progress) ? truncateText(progress.text) : null;
+  const delegation = isDelegationProgress(progress) ? delegationSummary(progress) : null;
+  const title = delegation
+    ? delegation.target
+      ? `Demande à ${delegation.target}`
+      : "Appel inter-agent"
+    : progressTitle(progress);
+  return (
+    <div data-testid="chat-tool-progress" className="flex min-w-0 justify-center">
+      <div
+        className={cn(
+          "min-w-0 max-w-[72%] overflow-hidden rounded-md border px-2.5 py-1.5 text-xs",
+          progressTone(progress),
+        )}
+      >
+        <div className="flex min-w-0 items-center justify-center gap-1.5">
+          {running && <Spinner size={12} />}
+          <span className="shrink-0 font-semibold">{title}</span>
+          {!delegation && (
+            <span className="min-w-0 truncate text-muted">{compactToolName(progress)}</span>
+          )}
+          <span className="shrink-0 text-muted">· {stage}</span>
+        </div>
+        {delegation?.excerpt && (
+          <p className="mt-1 text-center text-[11px] text-content" style={fourLineClamp}>
+            {delegation.excerpt}
+          </p>
+        )}
+        {delegation && (
+          <p className="mt-0.5 truncate text-center text-[11px] text-muted">
+            {compactToolName(progress)}
+          </p>
+        )}
+        {detail && (
+          <p className="mt-1 text-center text-[11px] text-content" style={fourLineClamp}>
+            {detail}
+          </p>
+        )}
+      </div>
+    </div>
+  );
 }
 
 function ProgressBubble({
@@ -1416,21 +1532,20 @@ function ProgressBubble({
   progress: ReplyProgress;
   settled?: boolean;
 }) {
+  if (isTimelineProgress(progress)) return <TurnMarker progress={progress} />;
+  if (isCenteredToolProgress(progress)) {
+    return <ToolProgressCard progress={progress} settled={settled} />;
+  }
   const title = progressTitle(progress);
   const stage = progressStageLabel(progress.stage);
   const source = progressSourceLabel(progress);
-  const detail = progress.text ? truncateProgressText(progress.text) : null;
+  const detail = progress.text ? truncateText(progress.text, 260) : null;
   const running = !settled && (progress.stage === "started" || progress.stage === "delta");
   return (
-    <div
-      className={cn(
-        "flex min-w-0",
-        isToolLikeProgress(progress) ? "justify-start pl-7" : "justify-center",
-      )}
-    >
+    <div data-testid="chat-progress-status" className="flex min-w-0 justify-end">
       <div
         className={cn(
-          "min-w-0 max-w-[86%] overflow-hidden rounded-md border px-2.5 py-1.5 text-xs",
+          "min-w-0 max-w-[58%] overflow-hidden rounded-md border px-2.5 py-1.5 text-xs",
           progressTone(progress),
         )}
       >
@@ -1440,15 +1555,17 @@ function ProgressBubble({
           <span className="min-w-0 truncate text-muted">{progress.label}</span>
           <span className="shrink-0 text-muted">· {stage}</span>
         </div>
-        <div className="mt-0.5 flex min-w-0 flex-wrap gap-x-2 gap-y-0.5 text-[11px] text-muted">
+        <div className="mt-0.5 flex min-w-0 flex-wrap justify-end gap-x-2 gap-y-0.5 text-[11px] text-muted">
           <span>{source}</span>
-          {progress.toolName && <span className="truncate">tool: {progress.toolName}</span>}
           {progress.nativeEvent && (
             <span className="truncate">event: {progress.nativeEvent}</span>
           )}
         </div>
         {detail && (
-          <p className="mt-1 whitespace-pre-wrap break-words text-content">
+          <p
+            className="mt-1 overflow-hidden whitespace-pre-wrap break-words text-content"
+            style={fourLineClamp}
+          >
             {detail}
           </p>
         )}