feat: Option for separate edit mode (#4203)

* stash

* wip

* cleanup

* Remove collaborativeEditing toggle, it will always be on in next release.
Flip separateEdit -> seamlessEdit

* Clarify language, hide toggle when collaborative editing is disabled

* Flip boolean to match, easier to reason about

app/models/User.ts

@@ -1,7 +1,7 @@
 import { subMinutes } from "date-fns";
 import { computed, observable } from "mobx";
 import { now } from "mobx-utils";
-import type { Role, UserPreferences } from "@shared/types";
+import type { Role, UserPreference, UserPreferences } from "@shared/types";
 import ParanoidModel from "./ParanoidModel";
 import Field from "./decorators/Field";
 
@@ -66,6 +66,31 @@ class User extends ParanoidModel {
       return "member";
     }
   }
+
+  /**
+   * Get the value for a specific preference key, or return the fallback if
+   * none is set.
+   *
+   * @param key The UserPreference key to retrieve
+   * @param fallback An optional fallback value, defaults to false.
+   * @returns The value
+   */
+  getPreference(key: UserPreference, fallback = false): boolean {
+    return this.preferences?.[key] ?? fallback;
+  }
+
+  /**
+   * Set the value for a specific preference key.
+   *
+   * @param key The UserPreference key to retrieve
+   * @param value The value to set
+   */
+  setPreference(key: UserPreference, value: boolean) {
+    this.preferences = {
+      ...this.preferences,
+      [key]: value,
+    };
+  }
 }
 
 export default User;