Add missing navigation links to chapters 6-13

Author: YZXBiz

docs/docs/06-kubernetes-deployments.md

@@ -1,4 +1,8 @@
-# 6. Kubernetes Deployments
+# Chapter 6: Kubernetes Deployments
+
+**Previous:** [Chapter 5: Virtual Clusters with Namespaces](05-virtual-clusters-namespaces.md) | **Next:** [Chapter 7: Kubernetes Services](07-kubernetes-services.md)
+
+---
 
 ## 📋 Table of Contents
 

docs/docs/07-kubernetes-services.md

@@ -1,4 +1,8 @@
-# 7. Kubernetes Services
+# Chapter 7: Kubernetes Services
+
+**Previous:** [Chapter 6: Kubernetes Deployments](06-kubernetes-deployments.md) | **Next:** [Chapter 8: Ingress](08-ingress.md)
+
+---
 
 ## 📋 Table of Contents
 

docs/docs/08-ingress.md

@@ -1,4 +1,8 @@
-# 8. Ingress
+# Chapter 8: Ingress
+
+**Previous:** [Chapter 7: Kubernetes Services](07-kubernetes-services.md) | **Next:** [Chapter 9: Wasm on Kubernetes](09-wasm-on-kubernetes.md)
+
+---
 
 ## 📋 Table of Contents
 

docs/docs/09-wasm-on-kubernetes.md

@@ -1,4 +1,9 @@
-# 9. Wasm on Kubernetes
+# Chapter 9: Wasm on Kubernetes
+
+**Previous:** [Chapter 8: Ingress](08-ingress.md) | **Next:** [Chapter 10: Service Discovery Deep Dive](10-service-discovery.md)
+
+---
+
 *The Universal Translator: Breaking Down Language Barriers in the Cloud*
 
 ## 📋 Table of Contents

docs/docs/10-service-discovery.md

@@ -1,4 +1,8 @@
-# 10. Service Discovery Deep Dive
+# Chapter 10: Service Discovery Deep Dive
+
+**Previous:** [Chapter 9: Wasm on Kubernetes](09-wasm-on-kubernetes.md) | **Next:** [Chapter 11: Kubernetes Storage](11-kubernetes-storage.md)
+
+---
 
 ## 📋 Table of Contents
 

docs/docs/11-kubernetes-storage.md

@@ -1,4 +1,8 @@
-# 11. Kubernetes Storage
+# Chapter 11: Kubernetes Storage
+
+**Previous:** [Chapter 10: Service Discovery Deep Dive](10-service-discovery.md) | **Next:** [Chapter 12: ConfigMaps and Secrets](12-configmaps-secrets.md)
+
+---
 
 ## 📋 Table of Contents
 

docs/docs/12-configmaps-secrets.md

@@ -1,4 +1,8 @@
-# 12. ConfigMaps and Secrets
+# Chapter 12: ConfigMaps and Secrets
+
+**Previous:** [Chapter 11: Kubernetes Storage](11-kubernetes-storage.md) | **Next:** [Chapter 13: StatefulSets](13-statefulsets.md)
+
+---
 
 ## 📋 Table of Contents
 

docs/docs/13-statefulsets.md

@@ -1,4 +1,8 @@
-# 13. StatefulSets
+# Chapter 13: StatefulSets
+
+**Previous:** [Chapter 12: ConfigMaps and Secrets](12-configmaps-secrets.md) | **Next:** [Chapter 14: API Security and RBAC](14-api-security-rbac.md)
+
+---
 
 ## 📋 Table of Contents