feat(analytics): improve dashboard with drag-to-zoom, referrer tracking, and UX fixes

[dviejokfs]

Summary

Comprehensive analytics dashboard improvements and platform-wide enhancements across backend, frontend, and CLI.

Analytics & Dashboard

• Drag-to-zoom on visitor chart — mouse drag selection with native div overlay using pixel coordinates from recharts, theme-aware highlight (bg-primary/10), reset zoom button
• URL-persisted date range — filter state (filter, from, to) synced to URL search params for browser back/forward navigation
• Fix sparkline rendering — replaced time_bucket_gapfill + CROSS JOIN LATERAL with generate_series + LEFT JOIN to handle single-bucket edge cases
• Fix "Direct" traffic missing from Referrers chart — added COALESCE(e.referrer_hostname, 'Direct') in get_property_breakdown() and get_property_timeline()
• Fix live globe visitor count mismatch — aligned window_minutes from 30 to 5 to match header count
• Referrer/source in visitors UI — added first_referrer, first_referrer_hostname, first_channel fields to visitor types, "Source" column in visitors table, "Source" card in visitor detail
• Time inputs in custom date range picker — start/end time fields in analytics filter popover and reusable date-range-picker component
• Add autofocus to API key name field

Deployments

• Rollback creates new deployment records — rollback now creates a fresh deployment with is_rollback: true and rolled_back_from_id metadata instead of reusing the target deployment
• Updated rollback tests to match new deployment-creation behavior

Database

• Migration m20260217_000001_add_first_referrer_to_visitor — adds first_referrer, first_referrer_hostname, first_channel columns to visitor table

CLI

• Deployment, domain, and environment command improvements
• Updated API client types for new analytics endpoints

Test Results

Crate	Passed	Failed	Ignored
temps-analytics-events	21	0	0
temps-analytics	22	0	0
temps-proxy	89	0	7
temps-deployments	165	0	6
temps-domains	26	0	3
temps-git	65	0	0
temps-logs	26	0	0
temps-entities	35	0	0
Total	449	0	16

All 449 tests pass. 16 ignored tests are pre-existing (Pebble ACME, Docker inspect, proxy integration).