[verified] refactor: harden operations and redesign device console

public/state/request-coordinator.js

@@ -1,14 +1,19 @@
 export class RequestCoordinator {
   #versions = new Map()
-  async run(channel, ownerId, operation) {
+  next(channel) {
     const version = (this.#versions.get(channel) || 0) + 1
     this.#versions.set(channel, version)
+    return version
+  }
+  isCurrent(channel, version) { return this.#versions.get(channel) === version }
+  async run(channel, ownerId, operation) {
+    const version = this.next(channel)
     try {
       const value = await operation()
-      return { accepted: this.#versions.get(channel) === version, ownerId, value }
+      return { accepted: this.isCurrent(channel, version), ownerId, value }
     } catch (error) {
-      return { accepted: this.#versions.get(channel) === version, ownerId, error }
+      return { accepted: this.isCurrent(channel, version), ownerId, error }
     }
   }
-  invalidate(channel) { this.#versions.set(channel, (this.#versions.get(channel) || 0) + 1) }
+  invalidate(channel) { return this.next(channel) }
 }