Stabilize multi-peer UI and fix container start API body

Keep the containers table scoped to the active peer with a merge store,
restore the last active server on boot with a restoring screen, start
containers without a Docker API body (v1.24+), and stop ⋮ menus from
sticking to the viewport bottom after refreshes.

server/handlers/deploy.js

@@ -1,7 +1,7 @@
 /**
  * Template / container deploy RPC handler.
  */
-import { docker } from '../services/docker.js'
+import { docker, startContainerNoBody } from '../services/docker.js'
 import * as validation from '../utils/validation.js'
 import { broadcastContainers } from './containers.js'
 import logger from '../utils/logger.js'
@@ -256,7 +256,7 @@ export function registerDeployHandlers(session) {
     }
 
     try {
-      await container.start()
+      await startContainerNoBody(container.id)
     } catch (startErr) {
       const formatted = formatDeployError(startErr, {
         stage: 'start',