feat(frontend): Kinetic Precision design system — new lime theme, glassmorphism, redesigned pages

- New design system: Stitch (kinetic-precision.css) with lime (#cafd00) accent
- New Google Fonts: Lexend, Plus Jakarta Sans, Space Grotesk
- New page: BenchmarksPage with strength/endurance/body tracking
- Redesigned: Dashboard, ProgressPage, WorkoutPage, LoginPage + LoginPage.css
- Add shared glassmorphism nav, kinetic buttons, intensity indicators
- Build: 265KB JS / 88KB CSS / 2.54s (clean)

scripts/preflight/04-backup-check.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+# Backup Procedure Validation
+echo "=== Backup Status Check ==="
+echo "Checking sealed-secrets backup..."
+kubectl get secret -n kube-system | grep -E 'sealed-secrets-key|backup' || echo "⚠️  No backup secret found"
+
+echo ""
+echo "Checking persistent volumes..."
+kubectl get pv | grep -E 'gravl|prod' || echo "No Gravl PVs found (ephemeral storage)"
+
+echo ""
+echo "Checking backup jobs..."
+kubectl get cronjob --all-namespaces | grep -i backup || echo "No backup CronJobs configured"