refactor(ui): supprime le popup de reprise par cellule (#177)

Retire la surface utilisateur de reprise par cellule :
- supprime ResumeConversationPopup et son test (resumeConversationPopup.test.tsx)
- débranche l'appel dans LayoutGrid et retire l'export terminals/index
- ajuste les tests dépendants (libellé « Terminé » dans LayoutGrid.chat.test, refitEpoch)
- commentaire affiné dans ResumeProjectPanel

La reprise implicite éventuelle sera rediscutée ultérieurement (objectif immédiat : retirer la surface).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/features/terminals/ResumeConversationPopup.tsx

@@ -1,120 +0,0 @@
-/**
- * Resume-conversation popup (T7). Shown for an agent cell whose PTY session is
- * dead but which carries a persisted `conversationId`, **before** the automatic
- * Resume launch fires. It lets the user choose between resuming the previous CLI
- * conversation or starting a fresh one.
- *
- * Pure presentation: it receives the status + best-effort details + the two
- * action callbacks. It never calls a gateway / `invoke()` itself — the parent
- * (`LayoutGrid`'s `LeafView`) wires it to the {@link AgentGateway} ports. The
- * status ("en cours" / "clot") is derived **only** from `agentWasRunning` (the
- * universal close-time flag), never from the inspector — a missing inspector
- * just hides the enriched topic/token lines (degraded mode).
- */
-
-import type { ConversationDetails } from "@/ports";
-
-interface ResumeConversationPopupProps {
-  /**
-   * Whether the agent process was running when the cell was last closed
-   * (`agentWasRunning`). `true` ⇒ "en cours"; `false`/absent ⇒ "clot". This is
-   * the universal status; it is NOT derived from the inspector.
-   */
-  agentWasRunning: boolean;
-  /**
-   * Best-effort enriched details (last topic + token indicator). `null` while
-   * loading; an empty object once loaded with no details available (degraded
-   * mode: only the status + the resume affordance are shown).
-   */
-  details: ConversationDetails | null;
-  /** Resume the previous conversation (keeps the conversation id ⇒ Resume). */
-  onResume: () => void;
-  /** Start a fresh conversation (clears the conversation id ⇒ Assign). */
-  onNewConversation: () => void;
-}
-
-export function ResumeConversationPopup({
-  agentWasRunning,
-  details,
-  onResume,
-  onNewConversation,
-}: ResumeConversationPopupProps) {
-  const statusLabel = agentWasRunning ? "en cours" : "clot";
-
-  return (
-    <div
-      data-testid="resume-conversation-popup"
-      role="dialog"
-      aria-label="Reprise de conversation"
-      style={{
-        position: "absolute",
-        inset: 0,
-        zIndex: 5,
-        display: "flex",
-        alignItems: "center",
-        justifyContent: "center",
-        background: "rgba(0, 0, 0, 0.55)",
-      }}
-    >
-      <div
-        style={{
-          minWidth: 260,
-          maxWidth: 360,
-          padding: "16px 18px",
-          background: "var(--color-surface, #1e1e1e)",
-          color: "var(--color-content, #e0e0e0)",
-          border: "1px solid var(--color-border, #3a3a3a)",
-          borderRadius: 6,
-          boxShadow: "0 8px 24px rgba(0, 0, 0, 0.5)",
-          fontSize: 13,
-        }}
-      >
-        <p style={{ margin: "0 0 8px", fontWeight: 600 }}>
-          Reprise de conversation
-        </p>
-
-        <p style={{ margin: "0 0 6px" }}>
-          Statut :{" "}
-          <span data-testid="resume-status">{statusLabel}</span>
-        </p>
-
-        {details?.lastTopic && (
-          <p style={{ margin: "0 0 6px" }} data-testid="resume-last-topic">
-            Dernier sujet : {details.lastTopic}
-          </p>
-        )}
-
-        {details?.tokenCount !== undefined && (
-          <p style={{ margin: "0 0 10px" }} data-testid="resume-token-count">
-            Tokens : {details.tokenCount}
-          </p>
-        )}
-
-        <div style={{ display: "flex", gap: 8, marginTop: 12 }}>
-          <button
-            type="button"
-            onClick={onResume}
-            style={{
-              flex: 1,
-              padding: "6px 10px",
-              cursor: "pointer",
-            }}
-          >
-            Reprendre la dernière conversation
-          </button>
-          <button
-            type="button"
-            onClick={onNewConversation}
-            style={{
-              flex: 1,
-              padding: "6px 10px",
-              cursor: "pointer",
-            }}
-          >
-            Nouvelle conversation
-          </button>
-        </div>
-      </div>
-    </div>
-  );
-}

frontend/src/features/terminals/index.ts

@@ -2,6 +2,5 @@
 
 export { TerminalView } from "./TerminalView";
 export type { TerminalInputApi } from "./TerminalView";
-export { ResumeConversationPopup } from "./ResumeConversationPopup";
 export { useWritePortal } from "./useWritePortal";
 export type { UseWritePortalResult } from "./useWritePortal";