feat: OPS-62 계좌 등록 UI 구현

app/build.gradle.kts

@@ -71,6 +71,7 @@ dependencies {
     implementation(libs.hilt.android)
     implementation(libs.androidx.foundation)
     implementation(libs.material3)
+    implementation(libs.androidx.room.ktx)
     ksp(libs.hilt.compiler)
     implementation(libs.hilt.navigation.compose)
 

app/src/main/java/com/ssafy/tiggle/domain/entity/account/RegisterAccount.kt

@@ -0,0 +1,63 @@
+package com.ssafy.tiggle.domain.entity.account
+
+data class RegisterAccount(
+    val accountNum: String = "",
+    val owner:String="",
+    val code:Int=0,
+    val attemptsLeft: Int=3,
+    val bankName:String="",
+    val date:String="",
+
+    val accountNumError: String? = null,
+    val codeError:String?=null
+) {
+    /** 숫자 외 문자를 제거한 정규화(붙여넣기 대비) */
+    private fun sanitize(raw: String): String = raw.filter { it.isDigit() }
+
+    /** 계좌번호 유효성 검사 */
+    fun validateAccountNum(input: String = accountNum): String? = when {
+        input.isBlank() -> "계좌번호를 입력해주세요."
+        !input.all { it.isDigit() } -> "숫자만 입력할 수 있습니다."
+        else -> null
+    }
+
+    /** 외부에서 raw 입력을 받아 정규화 + 검증해서 갱신 */
+    fun withValidation(raw: String): RegisterAccount {
+        val normalized = sanitize(raw)
+        return copy(
+            accountNum = normalized,
+            accountNumError = validateAccountNum(normalized)
+        )
+    }
+
+    /**
+     * 특정 필드만 유효성 검사를 수행하고 업데이트된 인스턴스 반환
+     */
+    fun validateField(field: ValidationRegisterField): RegisterAccount {
+        return when (field) {
+            ValidationRegisterField.ACCOUNT -> copy(
+                accountNumError = validateAccountNum(
+                    accountNum
+                )
+            )
+            ValidationRegisterField.CODE ->
+                copy(codeError = validateCode(code.toString()))
+        }
+    }
+    /**
+     * 코드 유효성 검사
+     */
+    fun validateCode(input: String): String? {
+        return when {
+            input.isBlank() -> "인증 코드를 입력해주세요."
+            !input.matches(Regex("^[0-9]+$")) -> "숫자만 입력할 수 있습니다."
+            else -> null
+        }
+    }
+}
+
+
+enum class ValidationRegisterField {
+    ACCOUNT,
+    CODE
+}

app/src/main/java/com/ssafy/tiggle/presentation/navigation/NavigationGraph.kt

@@ -16,6 +16,7 @@ import com.ssafy.tiggle.presentation.ui.auth.login.LoginScreen
 import com.ssafy.tiggle.presentation.ui.auth.signup.SignUpScreen
 import com.ssafy.tiggle.presentation.ui.piggybank.OpenAccountScreen
 import com.ssafy.tiggle.presentation.ui.piggybank.PiggyBankScreen
+import com.ssafy.tiggle.presentation.ui.piggybank.RegisterAccountScreen
 
 /**
  * 앱의 메인 네비게이션
@@ -78,6 +79,9 @@ fun NavigationGraph() {
                             onOpenAccountClick = {
                                 navBackStack.add(Screen.OpenAccount)
                             },
+                            onRegisterAccountClick = {
+                                navBackStack.add(Screen.RegisterAccount)
+                            },
                             onBackClick = {
                                 navBackStack.removeLastOrNull()
                             }
@@ -88,6 +92,10 @@ fun NavigationGraph() {
                         OpenAccountScreen()
                     }
 
+                    is Screen.RegisterAccount -> NavEntry(key) {
+                        RegisterAccountScreen()
+                    }
+
                     else -> throw IllegalArgumentException("Unknown route: $key")
                 }
 

app/src/main/java/com/ssafy/tiggle/presentation/navigation/Screen.kt

@@ -29,4 +29,7 @@ sealed interface Screen : NavKey {
 
     @Serializable
     object OpenAccount : Screen
+
+    @Serializable
+    object RegisterAccount : Screen
 }

app/src/main/java/com/ssafy/tiggle/presentation/ui/piggybank/PiggyBankScreen.kt

@@ -56,8 +56,9 @@ import com.ssafy.tiggle.presentation.ui.theme.TiggleGrayText
 @Composable
 fun PiggyBankScreen(
     modifier: Modifier = Modifier,
-    onOpenAccountClick:()-> Unit={},
-    onBackClick:()-> Unit={},
+    onOpenAccountClick: () -> Unit = {},
+    onRegisterAccountClick: () -> Unit = {},
+    onBackClick: () -> Unit = {},
     viewModel: PiggyBankViewModel = viewModel()
 ) {
     val uiState by viewModel.uiState.collectAsState()
@@ -113,7 +114,7 @@ fun PiggyBankScreen(
                 DottedActionCard(
                     title = "내 계좌 등록",
                     desc = "나의 계좌를 등록하면\n티끌 저금통에 잔돈이 자동으로 기부됩니다.",
-                    onClick = { /* TODO: 네비게이션 */ }
+                    onClick = onRegisterAccountClick
                 )
             }
             Spacer(Modifier.height(16.dp))