feat: 로그인 화면 및 공통 속성 생성

src/components/ui/AppText.tsx

@@ -0,0 +1,27 @@
+import React from "react";
+import { Text, type TextProps, type TextStyle } from "react-native";
+import { Theme } from "../../theme/theme";
+
+type Variant = "logo" | "title" | "body" | "muted" | "error";
+
+type Props = TextProps & {
+  variant?: Variant;
+  style?: TextStyle | TextStyle[];
+};
+
+export default function AppText({ variant = "body", style, ...props }: Props) {
+  const base: TextStyle = {
+    color: Theme.Colors.text,
+    fontSize: Theme.FontSize.md,
+  };
+
+  const variants: Record<Variant, TextStyle> = {
+    logo: { fontSize: Theme.FontSize.xxl, fontWeight: Theme.FontWeight.bold },
+    title: { fontSize: Theme.FontSize.xl, fontWeight: Theme.FontWeight.bold },
+    body: { fontSize: Theme.FontSize.md },
+    muted: { color: Theme.Colors.mutedText, fontSize: Theme.FontSize.sm },
+    error: { color: Theme.Colors.danger, fontSize: Theme.FontSize.sm },
+  };
+
+  return <Text {...props} style={[base, variants[variant], style]} />;
+}