feat: integrate Grafana dashboards into BOC DashboardPage

- Add Infrastructure Health section with CPU/Memory/Disk panels
- Add Service Status section with PM2/Docker panels
- Create GrafanaPanel component for iframe embedding
- Build passes successfully

backend/auth/middleware.go

@@ -0,0 +1,35 @@
+package auth
+
+import (
+	"net/http"
+	"strings"
+)
+
+// Middleware returns HTTP middleware that validates Bearer tokens
+func (s *JWTService) Middleware() func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			authHeader := r.Header.Get("Authorization")
+			if authHeader == "" {
+				http.Error(w, `{"error":"missing authorization header"}`, http.StatusUnauthorized)
+				return
+			}
+
+			parts := strings.SplitN(authHeader, " ", 2)
+			if len(parts) != 2 || strings.ToLower(parts[0]) != "bearer" {
+				http.Error(w, `{"error":"invalid authorization format"}`, http.StatusUnauthorized)
+				return
+			}
+
+			tokenString := parts[1]
+			claims, err := s.ValidateToken(tokenString)
+			if err != nil {
+				http.Error(w, `{"error":"invalid token"}`, http.StatusUnauthorized)
+				return
+			}
+
+			ctx := WithClaims(r.Context(), claims)
+			next.ServeHTTP(w, r.WithContext(ctx))
+		})
+	}
+}