Fix state tag color race condition when deleting a process

src/components/Process/StateTag.vue

@@ -15,16 +15,18 @@ import { PropType, defineComponent } from 'vue'
 export default defineComponent({
   props: {
     state: {
-      type: String as PropType<ProcessState>,
+      type: String as PropType<ProcessState | undefined>,
       required: true,
       validator: value => typeof value === 'string' && value in PROCESS_STATES
     }
   },
   computed: {
-    color () {
+    color (): string {
+      if (!this.state) return PROCESS_STATE_COLORS.default.cssClass
       return PROCESS_STATE_COLORS[this.state].cssClass
     },
     displayName () {
+      if (!this.state) return 'Unknown'
       return PROCESS_STATES[this.state]
     }
   }