Refactor year management in the database layer, enhance Year model with budget field, and update UI components for year selection and dashboard display

prisma/migrations/20251124231609_add_year_budget/migration.sql

@@ -0,0 +1,12 @@
+-- RedefineTables
+PRAGMA defer_foreign_keys=ON;
+PRAGMA foreign_keys=OFF;
+CREATE TABLE "new_Year" (
+    "year" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "budget" REAL NOT NULL DEFAULT 3000
+);
+INSERT INTO "new_Year" ("year") SELECT "year" FROM "Year";
+DROP TABLE "Year";
+ALTER TABLE "new_Year" RENAME TO "Year";
+PRAGMA foreign_keys=ON;
+PRAGMA defer_foreign_keys=OFF;

prisma/schema.prisma

@@ -10,7 +10,8 @@ datasource db {
 }
 
 model Year {
-  year Int @id
+  year   Int   @id
+  budget Float @default(3000)
 
   people Person[]
 }