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)

monitoring/health_report.json

@@ -0,0 +1,8 @@
+{
+  "timestamp": "2026-03-25T08:29:52+01:00",
+  "staging_api_http_code": "000FAIL",
+  "cert_manager": "HEALTHY",
+  "sealed_secrets": "HEALTHY",
+  "latency_ms": 31.7500000,
+  "summary": "Staging environment is OFFLINE. Infrastructure components: Cert-Manager (HEALTHY), Sealed-Secrets (HEALTHY)."
+}