feat(migration): add Supabase import and recovery tooling

server/db/schema/settings.ts

@@ -1,5 +1,5 @@
 import { sql } from "drizzle-orm";
-import { check, sqliteTable, text } from "drizzle-orm/sqlite-core";
+import { check, integer, sqliteTable, text } from "drizzle-orm/sqlite-core";
 import { user } from "./auth";
 
 export type AiProvider = "gemini" | "openai" | "groq" | "ollama";
@@ -23,3 +23,25 @@ export const userAiSettings = sqliteTable(
     ),
   ],
 );
+
+export const userPreferences = sqliteTable(
+  "user_preferences",
+  {
+    ownerUserId: text("owner_user_id")
+      .primaryKey()
+      .references(() => user.id, { onDelete: "cascade" }),
+    timezone: text("timezone").default("Europe/Istanbul").notNull(),
+    defaultCurrency: text("default_currency").default("TRY").notNull(),
+    language: text("language").default("tr").notNull(),
+    dateFormat: text("date_format").default("dd.MM.yyyy").notNull(),
+    colorMode: text("color_mode").default("system").notNull(),
+    sidebarCollapsed: integer("sidebar_collapsed", { mode: "boolean" }).default(false).notNull(),
+    createdAt: text("created_at").default(sql`CURRENT_TIMESTAMP`).notNull(),
+    updatedAt: text("updated_at").default(sql`CURRENT_TIMESTAMP`).notNull(),
+  },
+  (table) => [
+    check("user_preferences_currency_check", sql`length(${table.defaultCurrency}) = 3`),
+    check("user_preferences_language_check", sql`${table.language} in ('tr', 'en')`),
+    check("user_preferences_color_mode_check", sql`${table.colorMode} in ('light', 'dark', 'system')`),
+  ],
+);