Park source container on duplicate so host ports can be reused

When duplicating with the same host ports, stop+rename the origin, deploy
and verify the new container, then remove the parked source. Client
precheck ignores ports owned only by the origin to avoid false blocks.

ui/ops-app.js

@@ -759,12 +759,15 @@ export async function deployContainerWithSteps(args) {
   const state = { pulledOk: false }
   const replace = args.replace === true
   const fromAdd = args.source === 'add-container'
+  const fromDuplicate = args.source === 'duplicate' || Boolean(args.sourceContainerId)
   const alwaysPull = args.alwaysPull !== false
   const jobLabel = replace
     ? `Replace ${args.containerName || 'container'}`
-    : fromAdd
-      ? `Create ${args.containerName || 'container'}`
-      : `Deploy ${args.containerName || 'container'}`
+    : fromDuplicate
+      ? `Duplicate ${args.containerName || 'container'}`
+      : fromAdd
+        ? `Create ${args.containerName || 'container'}`
+        : `Deploy ${args.containerName || 'container'}`
 
   return runJob(
     jobLabel,
@@ -782,6 +785,11 @@ export async function deployContainerWithSteps(args) {
           log(`Image=${args.image}`)
           log(`Always pull image: ${alwaysPull ? 'yes' : 'no (local if present)'}`)
           if (replace) log('Mode: replace existing container with same name')
+          if (args.sourceContainerId) {
+            log(
+              `Origin: ${args.sourceContainerName || String(args.sourceContainerId).slice(0, 12)} — will stop+rename if name/ports conflict, remove after new container is verified`
+            )
+          }
           if (args.publishAllPorts) log('Publish all exposed ports: yes')
           if (args.ports?.length) log(`Ports: ${args.ports.join(', ')}`)
           if (args.volumes?.length) log(`Volumes: ${args.volumes.join(', ')}`)
@@ -845,12 +853,18 @@ export async function deployContainerWithSteps(args) {
       },
       {
         id: 'create',
-        label: replace ? 'Replace, create & start' : 'Create & start container',
+        label: replace
+          ? 'Replace, create & start'
+          : fromDuplicate
+            ? 'Swap origin, create & verify'
+            : 'Create & start container',
         run: async ({ log }) => {
           log(
             replace
               ? 'Removing previous container (if present), then creating…'
-              : 'Creating and starting container…'
+              : args.sourceContainerId
+                ? 'Parking origin if needed (stop+rename), then create/start/verify…'
+                : 'Creating and starting container…'
           )
           // Only skip server pull when client pull already succeeded
           const payload = {
@@ -863,7 +877,15 @@ export async function deployContainerWithSteps(args) {
             const res = await manager.request(Methods.deployContainer, payload)
             log(res?.message || `Container "${args.containerName}" is running`)
             if (res?.id) log(`ID: ${String(res.id).slice(0, 12)}`)
-            if (replace) log('Previous container was replaced')
+            if (res?.swapped) {
+              log(
+                res.parkedName
+                  ? `Origin was parked then removed after verify (was ${res.parkedName})`
+                  : 'Origin was parked then removed after verify'
+              )
+            } else if (replace) {
+              log('Previous container was replaced')
+            }
             return res
           } catch (err) {
             const info = explainError(err, 'deployContainer')
@@ -891,7 +913,7 @@ export async function deployContainerWithSteps(args) {
     ],
     {
       peerId: manager.active?.id,
-      icon: replace ? 'fa-recycle' : 'fa-rocket',
+      icon: replace ? 'fa-recycle' : fromDuplicate ? 'fa-clone' : 'fa-rocket',
       subtitle: args.image || args.containerName || null,
     }
   )