Analytics: Unique Visits mismatch between Overview and Visits tabs

## Description

For the same place and the same time window, the **Unique Visits** figure shown in the **Overview** tab does not match the **All Platforms** figure shown in the **Visits** tab.

## Steps to Reproduce

1. Open Creator Hub and navigate to the Analytics page.
2. Select a place (e.g. *Genesis City Stream*) and a time window (e.g. 60d).
3. Note the **Unique Visits** value on the **Overview** tab.
4. Switch to the **Visits** tab and note the **All Platforms** value.
5. The two numbers differ (e.g. Overview shows **4**, Visits tab shows **7**).

## Expected Behavior

Both tabs should display the same Unique Visits count for the same place and time window.

## Additional Context

- Reproduced on two different places and across both 30d and 60d time windows.
- Reproduced on both Mac and Windows.
- All other metrics (Total Visits, Retention, Engagement) match correctly between tabs.

Requested by Gabriel Díaz via Slack