fix(batch): resolve container IDs in sub-workflows

When batch operations are triggered via keyboard callbacks, the main
workflow only passes container names (not IDs). The sub-workflows now:
- Check if containerId is empty
- If empty, query Docker API to resolve name → ID
- Then proceed with the action

This fixes batch start/stop/restart/update operations failing with
404 "page not found" errors.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

n8n-container-update.json

@@ -39,6 +39,65 @@
         300
       ]
     },
+    {
+      "parameters": {
+        "conditions": {
+          "options": {
+            "caseSensitive": true,
+            "typeValidation": "loose"
+          },
+          "conditions": [
+            {
+              "id": "has-container-id",
+              "leftValue": "={{ $json.containerId }}",
+              "rightValue": "",
+              "operator": {
+                "type": "string",
+                "operation": "notEquals"
+              }
+            }
+          ],
+          "combinator": "and"
+        }
+      },
+      "id": "if-has-id",
+      "name": "Has Container ID?",
+      "type": "n8n-nodes-base.if",
+      "typeVersion": 2.2,
+      "position": [
+        400,
+        300
+      ]
+    },
+    {
+      "parameters": {
+        "url": "http://docker-socket-proxy:2375/v1.47/containers/json?all=true",
+        "options": {
+          "timeout": 5000
+        }
+      },
+      "id": "http-get-containers",
+      "name": "Get All Containers",
+      "type": "n8n-nodes-base.httpRequest",
+      "typeVersion": 4.2,
+      "position": [
+        560,
+        400
+      ]
+    },
+    {
+      "parameters": {
+        "jsCode": "// Find container by name and resolve ID\nconst triggerData = $('When executed by another workflow').item.json;\nconst containerName = triggerData.containerName;\nconst containers = $input.all();\n\n// Normalize function to strip leading slash\nconst normalizeName = (name) => name.replace(/^\\//, '').toLowerCase();\nconst searchName = normalizeName(containerName);\n\n// Find matching container\nlet matched = null;\nfor (const item of containers) {\n  const c = item.json;\n  if (c.Names && c.Names.length > 0) {\n    const cName = normalizeName(c.Names[0]);\n    if (cName === searchName || cName.includes(searchName)) {\n      matched = c;\n      break;\n    }\n  }\n}\n\nif (!matched) {\n  throw new Error(`Container '${containerName}' not found`);\n}\n\nreturn {\n  json: {\n    ...triggerData,\n    containerId: matched.Id\n  }\n};"
+      },
+      "id": "code-resolve-id",
+      "name": "Resolve Container ID",
+      "type": "n8n-nodes-base.code",
+      "typeVersion": 2,
+      "position": [
+        720,
+        400
+      ]
+    },
     {
       "parameters": {
         "method": "GET",
@@ -616,6 +675,46 @@
   ],
   "connections": {
     "When executed by another workflow": {
+      "main": [
+        [
+          {
+            "node": "Has Container ID?",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Has Container ID?": {
+      "main": [
+        [
+          {
+            "node": "Inspect Container",
+            "type": "main",
+            "index": 0
+          }
+        ],
+        [
+          {
+            "node": "Get All Containers",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Get All Containers": {
+      "main": [
+        [
+          {
+            "node": "Resolve Container ID",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "Resolve Container ID": {
       "main": [
         [
           {