add column color, card coverColor, and board background to data model

src/lib/schemas.ts

@@ -27,6 +27,7 @@ export const cardSchema = z.object({
   checklist: z.array(checklistItemSchema).default([]),
   dueDate: z.string().nullable().default(null),
   attachments: z.array(attachmentSchema).default([]),
+  coverColor: z.string().nullable().default(null),
   createdAt: z.string(),
   updatedAt: z.string(),
 });
@@ -36,10 +37,12 @@ export const columnSchema = z.object({
   title: z.string(),
   cardIds: z.array(z.string()).default([]),
   width: z.enum(["narrow", "standard", "wide"]).default("standard"),
+  color: z.string().nullable().default(null),
 });
 
 export const boardSettingsSchema = z.object({
   attachmentMode: z.enum(["link", "copy"]).default("link"),
+  background: z.enum(["none", "dots", "grid", "gradient"]).default("none"),
 });
 
 export const boardSchema = z.object({
@@ -51,7 +54,7 @@ export const boardSchema = z.object({
   columns: z.array(columnSchema).default([]),
   cards: z.record(z.string(), cardSchema).default({}),
   labels: z.array(labelSchema).default([]),
-  settings: boardSettingsSchema.default({ attachmentMode: "link" }),
+  settings: boardSettingsSchema.default({ attachmentMode: "link", background: "none" }),
 });
 
 export const appSettingsSchema = z.object({