feat(backend): global notices

Foxnouns.Frontend/src/lib/api/models/meta.ts

@@ -10,6 +10,7 @@ export type Meta = {
 	};
 	members: number;
 	limits: Limits;
+	notice: { id: string; message: string } | null;
 };
 
 export type Limits = {

Foxnouns.Frontend/src/lib/api/models/user.ts

@@ -41,6 +41,7 @@ export type UserWithHiddenFields = User & {
 
 export type UserSettings = {
 	dark_mode: boolean | null;
+	last_read_notice: string | null;
 };
 
 export type PartialMember = {