feat(session-limits): LS8-front — filet humain niveau 3 (saisie d'heure de reprise)

UI permettant à l'humain de renseigner l'heure de reprise quand le
niveau 2 détecte une limite sans heure exploitable.

- ports/index.ts : setResumeAt(agentId, resetsAtMs) sur InputGateway.
- adapters/input.ts : setResumeAt → invoke("set_resume_at").
- adapters/mock/index.ts : MockInputGateway.setResumeAt (resumeArmings[]).
- features/agents/useAgents.ts : action setResumeAt (sans mutation optimiste).
- features/agents/AgentLimitBadge.tsx : formulaire de saisie d'heure sur
  l'état suspected sans heure + helper pur timeInputToEpochMs (TODO LS7 retiré).
- features/agents/AgentsPanel.tsx : câblage onSetResumeAt.

Tests AgentLimitBadge.test.tsx mis à jour au nouveau contrat + couverture LS8 ;
typecheck propre, suite agents verte.

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

frontend/src/adapters/input.ts

@@ -44,4 +44,10 @@ export class TauriInputGateway implements InputGateway {
     // `request` envelope, and returns whether a pending resume was disarmed.
     return invoke<boolean>("cancel_resume", { agentId });
   }
+
+  async setResumeAt(agentId: string, resetsAtMs: number): Promise<void> {
+    // `set_resume_at` takes bare `agent_id` + `resets_at_ms` (camelCase), like
+    // `cancel_resume`; arms the cancellable resume at the chosen instant.
+    await invoke("set_resume_at", { agentId, resetsAtMs });
+  }
 }

frontend/src/adapters/mock/index.ts

@@ -1561,6 +1561,8 @@ export class MockInputGateway implements InputGateway {
   readonly frontAttached: { agentId: string; attached: boolean }[] = [];
   /** All recorded cancel-resume calls, in order. */
   readonly cancelledResumes: string[] = [];
+  /** All recorded set-resume-at armings (human net, level 3), in order. */
+  readonly resumeArmings: { agentId: string; resetsAtMs: number }[] = [];
   /**
    * What {@link cancelResume} resolves to (mirrors the backend `bool`: whether a
    * pending resume was disarmed). Tests can flip it to exercise the "already
@@ -1588,6 +1590,10 @@ export class MockInputGateway implements InputGateway {
     this.cancelledResumes.push(agentId);
     return this.cancelResumeResult;
   }
+
+  async setResumeAt(agentId: string, resetsAtMs: number): Promise<void> {
+    this.resumeArmings.push({ agentId, resetsAtMs });
+  }
 }
 
 /** In-memory permissions gateway. */

frontend/src/features/agents/AgentLimitBadge.test.tsx

@@ -1,13 +1,16 @@
 /**
- * LS7-front — {@link AgentLimitBadge} presentation + its pure helpers
+ * LS7/LS8-front — {@link AgentLimitBadge} presentation + its pure helpers
  * (ARCHITECTURE §21).
  *
- * Two layers:
- *  - the exported pure helpers `formatCountdown` / `formatResetTime` (edge cases:
- *    0, negative, sub-minute, multi-minute, midnight, seconds-stripped);
- *  - the rendered badge across its three states (limité jusqu'à HH:MM /
- *    "limité" without a time / "heure inconnue" for suspected without a reset),
- *    plus the "Annuler la reprise" button wiring when a resume is armed.
+ * Three layers:
+ *  - the exported pure helpers `formatCountdown` / `formatResetTime` /
+ *    `timeInputToEpochMs` (edge cases: 0, negative, sub-minute, multi-minute,
+ *    midnight, seconds-stripped, malformed/empty time input);
+ *  - the rendered badge across its states (limité jusqu'à HH:MM / "limité"
+ *    without a time / the "heure inconnue" resume-time form for a suspected limit
+ *    without a reset), plus the "Annuler la reprise" button wiring when a resume
+ *    is armed;
+ *  - the human-net form (LS8): submitting a time arms a resume via onSetResumeAt.
  */
 
 import { describe, it, expect, vi } from "vitest";
@@ -17,6 +20,7 @@ import {
   AgentLimitBadge,
   formatCountdown,
   formatResetTime,
+  timeInputToEpochMs,
 } from "./AgentLimitBadge";
 
 describe("formatCountdown", () => {
@@ -74,13 +78,48 @@ describe("formatResetTime", () => {
   });
 });
 
+describe("timeInputToEpochMs", () => {
+  it("maps HH:MM to the same calendar day as `now`", () => {
+    const now = new Date(2026, 0, 15, 9, 0, 0).getTime();
+    const ms = timeInputToEpochMs("14:30", now);
+    expect(ms).not.toBeNull();
+    const d = new Date(ms!);
+    expect(d.getFullYear()).toBe(2026);
+    expect(d.getMonth()).toBe(0);
+    expect(d.getDate()).toBe(15);
+    expect(d.getHours()).toBe(14);
+    expect(d.getMinutes()).toBe(30);
+    expect(d.getSeconds()).toBe(0);
+    expect(d.getMilliseconds()).toBe(0);
+  });
+
+  it("returns a past instant unchanged (backend clamps to now)", () => {
+    const now = new Date(2026, 0, 15, 18, 0, 0).getTime();
+    const ms = timeInputToEpochMs("08:00", now);
+    expect(ms).not.toBeNull();
+    expect(ms!).toBeLessThan(now);
+  });
+
+  it("returns null for empty or malformed input", () => {
+    const now = Date.now();
+    expect(timeInputToEpochMs("", now)).toBeNull();
+    expect(timeInputToEpochMs("nope", now)).toBeNull();
+    expect(timeInputToEpochMs("25:00", now)).toBeNull();
+    expect(timeInputToEpochMs("12:60", now)).toBeNull();
+  });
+});
+
 describe("AgentLimitBadge (render)", () => {
   const noop = () => {};
 
   it("shows 'limité jusqu'à HH:MM' when the reset time is known", () => {
     const at = new Date(2026, 0, 15, 14, 30, 0).getTime();
     render(
-      <AgentLimitBadge state={{ limitedUntil: at }} onCancelResume={noop} />,
+      <AgentLimitBadge
+        state={{ limitedUntil: at }}
+        onCancelResume={noop}
+        onSetResumeAt={noop}
+      />,
     );
     const expected = `limité jusqu'à ${formatResetTime(at)}`;
     expect(screen.getByText(expected)).toBeTruthy();
@@ -89,30 +128,74 @@ describe("AgentLimitBadge (render)", () => {
   });
 
   it("shows plain 'limité' when no reset time is known", () => {
-    render(<AgentLimitBadge state={{}} onCancelResume={noop} />);
-    expect(screen.getByText("limité")).toBeTruthy();
-  });
-
-  it("shows the 'heure inconnue' note for a suspected limit without a time", () => {
     render(
-      <AgentLimitBadge state={{ suspected: true }} onCancelResume={noop} />,
+      <AgentLimitBadge state={{}} onCancelResume={noop} onSetResumeAt={noop} />,
     );
     expect(screen.getByText("limité")).toBeTruthy();
-    expect(
-      screen.getByText(/heure inconnue — reprise à préciser/),
-    ).toBeTruthy();
   });
 
-  it("does NOT show the 'heure inconnue' note when a suspected limit has a time", () => {
+  it("shows the 'heure inconnue' resume-time form for a suspected limit without a time", () => {
+    render(
+      <AgentLimitBadge
+        state={{ suspected: true }}
+        onCancelResume={noop}
+        onSetResumeAt={noop}
+      />,
+    );
+    expect(screen.getByText("limité")).toBeTruthy();
+    expect(screen.getByText(/heure inconnue/)).toBeTruthy();
+    // The human-net form: a resume-time input + a "schedule resume" button.
+    expect(screen.getByLabelText("resume time")).toBeTruthy();
+    expect(screen.getByLabelText("schedule resume")).toBeTruthy();
+  });
+
+  it("does NOT show the resume-time form when a suspected limit has a time", () => {
     const at = new Date(2026, 0, 15, 14, 30, 0).getTime();
     render(
       <AgentLimitBadge
         state={{ suspected: true, limitedUntil: at }}
         onCancelResume={noop}
+        onSetResumeAt={noop}
       />,
     );
     expect(screen.getByText(`limité jusqu'à ${formatResetTime(at)}`)).toBeTruthy();
     expect(screen.queryByText(/heure inconnue/)).toBeNull();
+    expect(screen.queryByLabelText("resume time")).toBeNull();
+  });
+
+  it("submitting the resume-time form arms a resume at the chosen epoch-ms", () => {
+    const onSetResumeAt = vi.fn();
+    render(
+      <AgentLimitBadge
+        state={{ suspected: true }}
+        onCancelResume={noop}
+        onSetResumeAt={onSetResumeAt}
+      />,
+    );
+    fireEvent.change(screen.getByLabelText("resume time"), {
+      target: { value: "23:45" },
+    });
+    fireEvent.click(screen.getByLabelText("schedule resume"));
+    expect(onSetResumeAt).toHaveBeenCalledTimes(1);
+    const ms = onSetResumeAt.mock.calls[0][0] as number;
+    const d = new Date(ms);
+    expect(d.getHours()).toBe(23);
+    expect(d.getMinutes()).toBe(45);
+  });
+
+  it("does not arm a resume when the time input is empty (button disabled)", () => {
+    const onSetResumeAt = vi.fn();
+    render(
+      <AgentLimitBadge
+        state={{ suspected: true }}
+        onCancelResume={noop}
+        onSetResumeAt={onSetResumeAt}
+      />,
+    );
+    expect(
+      (screen.getByLabelText("schedule resume") as HTMLButtonElement).disabled,
+    ).toBe(true);
+    expect(onSetResumeAt).not.toHaveBeenCalled();
   });
 
   it("renders the countdown + calls onCancelResume when a resume is armed", () => {
@@ -122,6 +205,7 @@ describe("AgentLimitBadge (render)", () => {
       <AgentLimitBadge
         state={{ limitedUntil: Date.now(), resumeFireAt: fireAt }}
         onCancelResume={onCancelResume}
+        onSetResumeAt={noop}
       />,
     );
     // Countdown label present (≈ "reprise dans 1m 30s").
@@ -139,6 +223,7 @@ describe("AgentLimitBadge (render)", () => {
       <AgentLimitBadge
         state={{ resumeFireAt: Date.now() + 10_000 }}
         onCancelResume={noop}
+        onSetResumeAt={noop}
         busy
       />,
     );

frontend/src/features/agents/AgentLimitBadge.tsx

@@ -13,9 +13,29 @@
 
 import { useEffect, useState } from "react";
 
-import { Button, cn } from "@/shared";
+import { Button, Input, cn } from "@/shared";
 import type { AgentLimitState } from "./useAgents";
 
+/**
+ * Converts a `<input type="time">` value (`"HH:MM"`) into an epoch-ms instant on
+ * the same calendar day as `now`. Returns `null` for an empty/malformed value so
+ * the caller can ignore an incomplete entry.
+ *
+ * No future/past guard on purpose: an instant earlier than `now` is left as-is —
+ * the backend clamps a past time to "now" (⇒ immediate resume), so the front
+ * needs no strict validation.
+ */
+export function timeInputToEpochMs(value: string, now: number): number | null {
+  const match = /^(\d{1,2}):(\d{2})$/.exec(value.trim());
+  if (!match) return null;
+  const hours = Number(match[1]);
+  const minutes = Number(match[2]);
+  if (hours > 23 || minutes > 59) return null;
+  const d = new Date(now);
+  d.setHours(hours, minutes, 0, 0);
+  return d.getTime();
+}
+
 /** Formats an epoch-ms instant as a local `HH:MM` wall-clock label. */
 export function formatResetTime(epochMs: number): string {
   return new Date(epochMs).toLocaleTimeString([], {
@@ -40,13 +60,19 @@ export interface AgentLimitBadgeProps {
   state: AgentLimitState;
   /** Invoked when the user clicks "Annuler la reprise". */
   onCancelResume: () => void;
-  /** Disables the cancel action (e.g. while another request is in flight). */
+  /**
+   * Human net (level 3): invoked with the chosen wake-up instant (epoch-ms) when
+   * the user submits the resume-time form on a suspected-without-time limit.
+   */
+  onSetResumeAt: (resetsAtMs: number) => void;
+  /** Disables the actions (e.g. while another request is in flight). */
   busy?: boolean;
 }
 
 export function AgentLimitBadge({
   state,
   onCancelResume,
+  onSetResumeAt,
   busy = false,
 }: AgentLimitBadgeProps) {
   const { limitedUntil, resumeFireAt, suspected } = state;
@@ -60,6 +86,24 @@ export function AgentLimitBadge({
     return () => clearInterval(id);
   }, [resumeFireAt]);
 
+  // Local resume-time entry (human net form). Bound to a `time` input.
+  const [resumeTime, setResumeTime] = useState("");
+
+  // The human-net form shows only when the limit is *suspected* with neither a
+  // reliable reset time nor an armed resume — IdeA must ask before resuming.
+  const needsResumeTime =
+    suspected === true &&
+    limitedUntil === undefined &&
+    resumeFireAt === undefined;
+
+  function handleSubmitResumeTime(e: React.FormEvent) {
+    e.preventDefault();
+    const epochMs = timeInputToEpochMs(resumeTime, Date.now());
+    if (epochMs === null) return;
+    onSetResumeAt(epochMs);
+    setResumeTime("");
+  }
+
   const limitLabel =
     limitedUntil !== undefined
       ? `limité jusqu'à ${formatResetTime(limitedUntil)}`
@@ -82,15 +126,37 @@ export function AgentLimitBadge({
         {limitLabel}
       </span>
 
-      {suspected && limitedUntil === undefined && (
-        // Human net (level 3, §21.1): the limit is suspected but no reliable time
-        // is known. IdeA never resumes blind. NOTE: there is no backend command
-        // yet to persist a user-entered resume time, so we only surface the state
-        // here. TODO(LS-front): wire an hour-entry form once the backend exposes a
-        // command to record the chosen resume instant — do NOT fabricate one.
-        <span className="text-xs text-muted" role="note">
-          heure inconnue — reprise à préciser
-        </span>
+      {needsResumeTime && (
+        // Human net (level 3, §21.1): the limit is suspected with no reliable
+        // time. IdeA never resumes blind — ask the user for a resume time, then
+        // arm it via `set_resume_at`. A past time is clamped to "now" by the
+        // backend (⇒ immediate resume), so no strict validation is needed here.
+        <form
+          onSubmit={handleSubmitResumeTime}
+          className="flex items-center gap-2"
+          aria-label="resume time form"
+        >
+          <span className="text-xs text-muted" role="note">
+            heure inconnue
+          </span>
+          <Input
+            type="time"
+            aria-label="resume time"
+            value={resumeTime}
+            disabled={busy}
+            onChange={(e) => setResumeTime(e.target.value)}
+            className="h-8 w-28 text-xs"
+          />
+          <Button
+            type="submit"
+            size="sm"
+            variant="primary"
+            aria-label="schedule resume"
+            disabled={busy || resumeTime.trim() === ""}
+          >
+            Programmer la reprise
+          </Button>
+        </form>
       )}
 
       {resumeFireAt !== undefined && (

frontend/src/features/agents/AgentsPanel.tsx

@@ -381,6 +381,9 @@ export function AgentsPanel({ projectId, projectRoot = "" }: AgentsPanelProps) {
                       state={limitState}
                       busy={vm.busy}
                       onCancelResume={() => void vm.cancelResume(a.id)}
+                      onSetResumeAt={(resetsAtMs) =>
+                        void vm.setResumeAt(a.id, resetsAtMs)
+                      }
                     />
                   )}
 

frontend/src/features/agents/useAgents.ts

@@ -121,6 +121,13 @@ export interface AgentsViewModel {
    * resume had already fired / none was armed).
    */
   cancelResume: (agentId: string) => Promise<boolean>;
+  /**
+   * Human net (level 3, ARCHITECTURE §21.1): arms a resume at a user-chosen
+   * `resetsAtMs` (epoch-ms) for an agent whose limit was suspected without a
+   * reliable time. No optimistic mutation — the backend re-emits
+   * `agentResumeScheduled`, which flips the badge to the nominal countdown.
+   */
+  setResumeAt: (agentId: string, resetsAtMs: number) => Promise<void>;
 }
 
 function describe(e: unknown): string {
@@ -447,6 +454,19 @@ export function useAgents(projectId: string): AgentsViewModel {
     [input],
   );
 
+  const setResumeAt = useCallback(
+    async (agentId: string, resetsAtMs: number): Promise<void> => {
+      // No optimistic mutation: the backend re-emits `agentResumeScheduled`,
+      // which the subscription folds into `limitByAgent` (badge → countdown).
+      try {
+        await input?.setResumeAt(agentId, resetsAtMs);
+      } catch (e) {
+        setError(describe(e));
+      }
+    },
+    [input],
+  );
+
   return {
     agents,
     selectedAgentId,
@@ -468,5 +488,6 @@ export function useAgents(projectId: string): AgentsViewModel {
     launchAgent,
     stopAgent,
     cancelResume,
+    setResumeAt,
   };
 }

frontend/src/ports/index.ts

@@ -561,6 +561,15 @@ export interface InputGateway {
    * `agentResumeCancelled` on success, which clears the countdown in the UI.
    */
   cancelResume(agentId: string): Promise<boolean>;
+  /**
+   * Human net (level 3, ARCHITECTURE §21.1): arms a resume at a user-chosen
+   * instant for an agent whose limit was *suspected* without a reliable reset
+   * time. `resetsAtMs` is the chosen wake-up in epoch-milliseconds; the backend
+   * clamps a past instant to "now" (⇒ immediate resume). This arms the same
+   * cancellable resume as the automatic path and re-emits `agentResumeScheduled`,
+   * so the UI flips on its own from "heure inconnue" to the nominal countdown.
+   */
+  setResumeAt(agentId: string, resetsAtMs: number): Promise<void>;
 }
 
 /**