feat : display container port mappings in environment health

Extract exposed ports from docker inspect and show them as badges (hostPort:containerPort)
in the environment health section.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/services/dto/dashboard.ts

@@ -16,6 +16,12 @@ type DashboardResponse = {
     applications: DashboardApplication[]
 }
 
+type PortMapping = {
+    hostPort: string
+    containerPort: string
+    protocol: string
+}
+
 type EnvironmentHealth = {
     status: string
     version: string
@@ -24,4 +30,5 @@ type EnvironmentHealth = {
     memoryUsage: string
     memoryLimit: string
     memoryPercent: number
+    ports: PortMapping[]
 }