Type the evaluator stubs as variadic mocks

tsc rejects spreading unknown[] into a zero-parameter vi.fn; give the
context-evaluator stubs a variadic signature and cast the recorded call
tuples where the tests read them back.

src/app/api/insights/coach/nudge-status/__tests__/route.test.ts

@@ -52,8 +52,9 @@ describe("nudge-status — NEXT_APP_OPEN hook", () => {
     await (GET as unknown as () => Promise<unknown>)();
 
     expect(evaluateContext).toHaveBeenCalledTimes(1);
-    const [prismaArg, userId, trigger] = evaluateContext.mock.calls[0]!;
-    expect((prismaArg as { __tag: string }).__tag).toBe("prisma");
+    const [prismaArg, userId, trigger] = evaluateContext.mock
+      .calls[0] as unknown as [{ __tag: string }, string, string];
+    expect(prismaArg.__tag).toBe("prisma");
     expect(userId).toBe("u1");
     expect(trigger).toBe("app-open");
     // Ordering: the surfaced message must be visible to this very read.

src/lib/ai/coach/__tests__/context-reminders.test.ts

@@ -137,9 +137,11 @@ describe("evaluateCoachContextReminders — measurement cues", () => {
       "measurement",
       NOW,
     );
-    const where = prisma.coachReminder.findMany.mock.calls[0]![0]!.where as {
-      contextCue: { in: string[] };
-    };
+    const where = (
+      prisma.coachReminder.findMany.mock.calls[0] as unknown as [
+        { where: { contextCue: { in: string[] } } },
+      ]
+    )[0].where;
     expect(where.contextCue.in).not.toContain("NEXT_APP_OPEN");
   });
 });

src/lib/jobs/__tests__/coach-reminder-sweep.test.ts

@@ -21,10 +21,12 @@ vi.mock("@/lib/ai/coach/bytes-codec", () => ({
 
 // The context-cue backstop delegates to the shared evaluator; its own
 // behaviour is pinned in `ai/coach/__tests__/context-reminders.test.ts`.
-const contextEvaluateMock = vi.fn(async () => ({ surfaced: 0, errored: 0 }));
+const contextEvaluateMock = vi.fn(async (..._args: unknown[]) => ({
+  surfaced: 0,
+  errored: 0,
+}));
 vi.mock("@/lib/ai/coach/context-reminders", () => ({
-  evaluateCoachContextReminders: (...args: unknown[]) =>
-    contextEvaluateMock(...args),
+  evaluateCoachContextReminders: contextEvaluateMock,
 }));
 
 import { runCoachReminderSweep } from "../coach-reminder-sweep";

src/lib/jobs/__tests__/reminder-satisfy.test.ts

@@ -21,10 +21,12 @@ vi.mock("@/lib/jobs/boss-instance", () => ({
 // the Vorsorge assertions stay isolated; one test below pins that the hook
 // actually fires (watched red: removing the call site in
 // `runReminderSatisfyForUser` fails it).
-const evaluateContextMock = vi.fn(async () => ({ surfaced: 0, errored: 0 }));
+const evaluateContextMock = vi.fn(async (..._args: unknown[]) => ({
+  surfaced: 0,
+  errored: 0,
+}));
 vi.mock("@/lib/ai/coach/context-reminders", () => ({
-  evaluateCoachContextReminders: (...args: unknown[]) =>
-    evaluateContextMock(...args),
+  evaluateCoachContextReminders: evaluateContextMock,
 }));
 
 import {