feat(mcp,orchestrator,frontend): tool idea_restart_self, redemarrage autonome d'un agent — #288 (tool core self-only via requester MCP handshake, retour immediat {restartId, status: scheduled} puis orchestration detachee: snapshot reprise, stop PTY/structured, liberation Busy/mailbox, relance LaunchAgent meme conversation_id fresh_start=false, injection interne invisible; events domain/wire agentRestartRequested/PhaseChanged/Completed/Failed phases stopping/releasingInput/launching/resuming; CLI custom: separateurs exacts redemarrage de l'agent + etat termine/echoue, deduplication (restartId, event), verrouillage composer; TUI native: overlay AgentRestartOverlay sans injection xterm, progress/annonces projetes jusqu'a idle; QA verte: mcp_server restart_self 1/1, restart-self 3/3, backend self_restart_contract + events wire 2/2, frontend 3 suites 92/92, npm build, cargo check --workspace, fmt --check, diff --check; reserves hors perimetre: web-server 103/110 fixture PTY preexistante, 34 echecs npm test globaux listProjectSettings/web hors #288; scripts/ hors perimetre)

frontend/src/features/agents/CustomAgentChatView.tsx

@@ -31,7 +31,11 @@ import type {
   SlashCommand,
 } from "@/domain";
 import { useGateways } from "@/app/di";
-import { AnnouncementsPreview } from "@/features/announcements";
+import {
+  AnnouncementsPreview,
+  shortRestartFailure,
+  useAgentRestart,
+} from "@/features/announcements";
 import { usePluginRuntime } from "@/features/plugins/PluginRuntimeProvider";
 import {
   markProjectCliInteractionFinished,
@@ -68,6 +72,7 @@ type ChatTurn =
   | { role: "progress"; progress: ReplyProgress; settled?: boolean; progressKey?: string }
   | { role: "final"; text: string; receivedAtMs?: number }
   | { role: "error"; text: string; receivedAtMs?: number }
+  | { role: "restart"; key: string; text: string; message?: string; failed?: boolean }
   | { role: "unknown"; text: string; receivedAtMs?: number };
 
 interface CachedChatView {
@@ -1127,9 +1132,14 @@ export function CustomAgentChatView({
       currentAgentBusy: false,
       delegationTargetName: null,
     });
+  const { restart, events: restartEvents } = useAgentRestart(agentId);
   const delegationActive = requesterDelegation.delegationTargetName !== null;
   const effectiveBusy =
-    busy || stopping || requesterDelegation.currentAgentBusy || delegationActive;
+    busy ||
+    stopping ||
+    Boolean(restart && restart.outcome !== "failed") ||
+    requesterDelegation.currentAgentBusy ||
+    delegationActive;
   const delegationFallbackText = requesterDelegation.delegationTargetName
     ? `${agentName} attend ${requesterDelegation.delegationTargetName}`
     : "Délégation en cours.";
@@ -1303,6 +1313,45 @@ export function CustomAgentChatView({
     };
   }, [agentId, projectId, refreshRequesterDelegation, system]);
 
+  useEffect(() => {
+    if (restartEvents.length === 0) return;
+    updateChatViewState((previous) => {
+      const nextTurns = [...previous.turns];
+      let changed = false;
+      for (const event of restartEvents) {
+        const key = `${event.restartId}:${event.type}`;
+        if (nextTurns.some((turn) => turn.role === "restart" && turn.key === key)) {
+          continue;
+        }
+        if (event.type === "agentRestartRequested") {
+          changed = true;
+          nextTurns.push({
+            role: "restart",
+            key,
+            text: "------- redemarrage de l'agent -------",
+          });
+        } else if (event.type === "agentRestartCompleted") {
+          changed = true;
+          nextTurns.push({
+            role: "restart",
+            key,
+            text: "------- redemarrage de l'agent termine -------",
+          });
+        } else {
+          changed = true;
+          nextTurns.push({
+            role: "restart",
+            key,
+            text: "------- redemarrage de l'agent echoue -------",
+            message: shortRestartFailure(event.message),
+            failed: true,
+          });
+        }
+      }
+      return changed ? { ...previous, turns: nextTurns } : previous;
+    });
+  }, [restartEvents, updateChatViewState]);
+
   useEffect(() => {
     mountedRef.current = true;
     return () => {
@@ -2577,6 +2626,20 @@ function ChatBubble({
   expandedProgressKeys: Set<string>;
   onToggleProgressExpanded: (key: string) => void;
 }) {
+  if (turn.role === "restart") {
+    return (
+      <div
+        data-testid="agent-restart-separator"
+        className={cn(
+          "flex min-w-0 flex-col items-center gap-1 py-1 text-xs",
+          turn.failed ? "text-danger" : "text-muted",
+        )}
+      >
+        <span className="whitespace-pre-wrap text-center">{turn.text}</span>
+        {turn.message && <span className="max-w-[86%] text-center">{turn.message}</span>}
+      </div>
+    );
+  }
   if (turn.role === "tool") {
     return (
       <div className="flex min-w-0 justify-center">