In the Statistics section (/statistics), the custom date range picker (CUSTOM time filter) allows users to select or manually input arbitrary historical years well before the creation of the Feedback Tracker (e.g., year 1551 or earlier).

The date input fields lack a minimum boundary constraint (minDate restriction), allowing invalid query parameters (from=1551-12-31) to be submitted to the backend.

Steps to Reproduce:

1. Navigate to the Feedback Tracker Statistics page (https://report.bistudio.com/statistics).

2. Select the CUSTOM time filter option.

3. Open the "From" date picker or manually type a year prior to the platform's creation (e.g., 1551-12-31).

4. Apply the filter.

Expected Result: The date picker should enforce a sensible minimum date limit (e.g., the launch date of the Feedback Tracker platform - 2026) and prevent selecting earlier dates.

Actual Result: Users can select or input any historical date without validation, sending useless date queries to the server.

Suggested Fix:

• Set a minDate property on the frontend date-picker component corresponding to the launch date of the Feedback Tracker.

• Implement backend API validation to reject queries where from is earlier than the platform creation boundary.