Fix container name handling for hyphenated service names

Extract ContainerNameFor and SplitContainerName into names.go.
ContainerNameFor handles single-component services where service
name equals component name (e.g., mc-proxy → "mc-proxy" not
"mc-proxy-mc-proxy"). SplitContainerName checks known services
from the registry before falling back to naive split on "-", fixing
mc-proxy being misidentified as service "mc" component "proxy".

Also fixes podman ps JSON parsing (Command field is []string not
string) found during deployment.

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

internal/agent/status.go

@@ -3,7 +3,6 @@ package agent
 import (
 	"context"
 	"fmt"
-	"strings"
 	"time"
 
 	mcpv1 "git.wntrmute.dev/kyle/mcp/gen/mcp/v1"
@@ -75,7 +74,10 @@ func (a *Agent) liveCheckServices(ctx context.Context) ([]*mcpv1.ServiceInfo, er
 	}
 
 	var result []*mcpv1.ServiceInfo
+	knownServices := make(map[string]bool, len(services))
 	for _, svc := range services {
+		knownServices[svc.Name] = true
+
 		components, err := registry.ListComponents(a.DB, svc.Name)
 		if err != nil {
 			return nil, fmt.Errorf("list components for %q: %w", svc.Name, err)
@@ -87,7 +89,7 @@ func (a *Agent) liveCheckServices(ctx context.Context) ([]*mcpv1.ServiceInfo, er
 		}
 
 		for _, comp := range components {
-			containerName := svc.Name + "-" + comp.Name
+			containerName := ContainerNameFor(svc.Name, comp.Name)
 			ci := &mcpv1.ComponentInfo{
 				Name:         comp.Name,
 				Image:        comp.Image,
@@ -116,7 +118,7 @@ func (a *Agent) liveCheckServices(ctx context.Context) ([]*mcpv1.ServiceInfo, er
 			continue
 		}
 
-		svcName, compName := splitContainerName(c.Name)
+		svcName, compName := SplitContainerName(c.Name, knownServices)
 
 		result = append(result, &mcpv1.ServiceInfo{
 			Name:   svcName,
@@ -210,13 +212,3 @@ func (a *Agent) GetServiceStatus(ctx context.Context, req *mcpv1.GetServiceStatu
 		RecentEvents: protoEvents,
 	}, nil
 }
-
-// splitContainerName splits a container name like "metacrypt-api" into service
-// and component parts. If there is no hyphen, the whole name is used as both
-// the service and component name.
-func splitContainerName(name string) (service, component string) {
-	if i := strings.Index(name, "-"); i >= 0 {
-		return name[:i], name[i+1:]
-	}
-	return name, name
-}