Remove explicit-function-return-type suppressions in engagement dashboard hooks

[Agarwalchetan]

Several hooks inside the engagement dashboard disable the ESLint rule @typescript-eslint/explicit-function-return-type using inline suppressions.

This reduces type safety and introduces inconsistency with other hooks in the codebase that explicitly annotate their return types.

---

Affected Files

Located in:

apps/meteor/client/views/admin/engagementDashboard/

The following hooks currently suppress the rule:

• useChannelsList.ts
• useActiveUsers.ts
• useMessageOrigins.ts
• useMessagesSent.ts
• useHourlyChatActivity.ts
• useTopFivePopularChannels.ts
• useUsersByTimeOfTheDay.ts
• useWeeklyChatActivity.ts

Each file contains:

// eslint-disable-next-line @typescript-eslint/explicit-function-return-type

---