feat: 添加修改密码功能

database/schema.sql

@@ -22,3 +22,10 @@ CREATE TABLE IF NOT EXISTS config (
     key TEXT PRIMARY KEY,
     value TEXT
 );
+
+CREATE TABLE IF NOT EXISTS users (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    username TEXT NOT NULL UNIQUE,
+    password TEXT NOT NULL,
+    created_at TEXT DEFAULT (datetime('now'))
+);