Persistent timeframe and improved filters in Data Views

Working across Data Views, Metrics, and Errors is now less repetitive.

• Selected timeframe is persisted across data pages so jumping from Overview to Metrics to Errors keeps the same range.
• The granularity persistence logic that occasionally locked the page into “1-minute” buckets has been removed; granularity now follows the chosen range automatically.
• Filter state is cleared automatically when the workspace or organization changes, avoiding the case where filters from one workspace silently applied to another.
• Real-time view timespan defaults to 24 hours and updates the URL so the view is shareable.
• Engagement and QoE charts refresh on every timeframe change instead of holding stale data.

Filters that produce overly long query strings now show a wrap-friendly toast instead of breaking the page.