refactor(test): stabilize case tables and readonly helper inputs

src/discord/monitor.test.ts

@@ -1,5 +1,6 @@
 import { ChannelType, type Guild } from "@buape/carbon";
 import { describe, expect, it, vi } from "vitest";
+import { typedCases } from "../test-utils/typed-cases.js";
 import {
   allowListMatches,
   buildDiscordMediaPayload,
@@ -637,7 +638,11 @@ describe("discord autoThread name sanitization", () => {
 
 describe("discord reaction notification gating", () => {
   it("applies mode-specific reaction notification rules", () => {
-    const cases = [
+    const cases = typedCases<{
+      name: string;
+      input: Parameters<typeof shouldEmitDiscordReactionNotification>[0];
+      expected: boolean;
+    }>([
       {
         name: "unset defaults to own (author is bot)",
         input: {
@@ -721,7 +726,7 @@ describe("discord reaction notification gating", () => {
         },
         expected: true,
       },
-    ] as const;
+    ]);
 
     for (const testCase of cases) {
       expect(
@@ -963,7 +968,18 @@ describe("discord reaction notification modes", () => {
   const guild = fakeGuild(guildId, "Mode Guild");
 
   it("applies message-fetch behavior across notification modes and channel types", async () => {
-    const cases = [
+    const cases = typedCases<{
+      name: string;
+      reactionNotifications: "off" | "all" | "allowlist" | "own";
+      users: string[] | undefined;
+      userId: string | undefined;
+      channelType: ChannelType;
+      channelId: string | undefined;
+      parentId: string | undefined;
+      messageAuthorId: string;
+      expectedMessageFetchCalls: number;
+      expectedEnqueueCalls: number;
+    }>([
       {
         name: "off mode",
         reactionNotifications: "off" as const,
@@ -1024,7 +1040,7 @@ describe("discord reaction notification modes", () => {
         expectedMessageFetchCalls: 0,
         expectedEnqueueCalls: 1,
       },
-    ] as const;
+    ]);
 
     for (const testCase of cases) {
       enqueueSystemEventSpy.mockClear();