feat: Consolidate user, role, and theme settings tables into a single migration file

scripts/migrations/000_base.sql

@@ -158,4 +158,32 @@ ALTER TABLE capex
 ALTER TABLE opex
     DROP COLUMN IF EXISTS currency_code;
 
+-- Role-based access control tables
+CREATE TABLE IF NOT EXISTS roles (
+    id SERIAL PRIMARY KEY,
+    name VARCHAR(255) UNIQUE NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS users (
+    id SERIAL PRIMARY KEY,
+    username VARCHAR(255) UNIQUE NOT NULL,
+    email VARCHAR(255) UNIQUE NOT NULL,
+    hashed_password VARCHAR(255) NOT NULL,
+    role_id INTEGER NOT NULL REFERENCES roles (id) ON DELETE RESTRICT
+);
+
+CREATE INDEX IF NOT EXISTS ix_users_username ON users (username);
+CREATE INDEX IF NOT EXISTS ix_users_email ON users (email);
+
+-- Theme settings configuration table
+CREATE TABLE IF NOT EXISTS theme_settings (
+    id SERIAL PRIMARY KEY,
+    theme_name VARCHAR(255) UNIQUE NOT NULL,
+    primary_color VARCHAR(7) NOT NULL,
+    secondary_color VARCHAR(7) NOT NULL,
+    accent_color VARCHAR(7) NOT NULL,
+    background_color VARCHAR(7) NOT NULL,
+    text_color VARCHAR(7) NOT NULL
+);
+
 COMMIT;