feat: 实现我的页

纯静态入口列表（头像卡 + 应用设置 / 关于 两组入口），无 ViewModel、无状态。
新增 12 条 profile_* 文案资源，颜色统一走设计系统 TextSecondary。

app/src/main/java/com/placeholder/ringhealth/feature/profile/ProfileScreen.kt

@@ -1,18 +1,138 @@
 package com.placeholder.ringhealth.feature.profile
 
-import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.AccountCircle
+import androidx.compose.material.icons.filled.Info
+import androidx.compose.material.icons.filled.Notifications
+import androidx.compose.material.icons.filled.Refresh
+import androidx.compose.material.icons.filled.Settings
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.dp
 import com.placeholder.ringhealth.R
+import com.placeholder.ringhealth.core.designsystem.MetricGreen
+import com.placeholder.ringhealth.core.designsystem.RingHealthTheme
+import com.placeholder.ringhealth.core.designsystem.TextSecondary
+import com.placeholder.ringhealth.core.designsystem.component.HealthCard
+import com.placeholder.ringhealth.core.designsystem.component.SectionHeader
 
-/** 我的页（占位，待 Task 11 实现）。 */
+/**
+ * “我的”页。全部为静态入口，无状态、无 ViewModel。
+ *
+ * 本页**不需要**再拆「有状态外壳 + 无状态内容」（ledger Ruling R26 的常规形状）：
+ * 它本身就是无状态的，直接对它挂 `@Preview` 即可。
+ */
 @Composable
 fun ProfileScreen(modifier: Modifier = Modifier) {
-    Box(modifier = modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
-        Text(stringResource(R.string.tab_profile))
+    LazyColumn(
+        modifier = modifier.fillMaxSize(),
+        contentPadding = PaddingValues(16.dp),
+        verticalArrangement = Arrangement.spacedBy(12.dp),
+    ) {
+        item {
+            HealthCard {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Icon(
+                        imageVector = Icons.Filled.AccountCircle,
+                        contentDescription = null,
+                        tint = MetricGreen,
+                        modifier = Modifier.size(48.dp),
+                    )
+                    Column(modifier = Modifier.padding(start = 12.dp)) {
+                        Text(
+                            text = stringResource(R.string.profile_nickname),
+                            style = MaterialTheme.typography.titleMedium,
+                        )
+                        Text(
+                            text = stringResource(R.string.profile_login_hint),
+                            style = MaterialTheme.typography.bodySmall,
+                            color = TextSecondary,
+                        )
+                    }
+                }
+            }
+        }
+        item { SectionHeader(title = stringResource(R.string.profile_group_app)) }
+        item {
+            ProfileEntry(
+                icon = Icons.Filled.Settings,
+                title = stringResource(R.string.profile_units),
+                subtitle = stringResource(R.string.profile_units_desc),
+            )
+        }
+        item {
+            ProfileEntry(
+                icon = Icons.Filled.Notifications,
+                title = stringResource(R.string.profile_notification),
+                subtitle = stringResource(R.string.profile_notification_desc),
+            )
+        }
+        item { SectionHeader(title = stringResource(R.string.profile_group_about)) }
+        item {
+            ProfileEntry(
+                icon = Icons.Filled.Refresh,
+                title = stringResource(R.string.profile_check_update),
+                subtitle = stringResource(R.string.profile_check_update_desc),
+            )
+        }
+        item {
+            ProfileEntry(
+                icon = Icons.Filled.Info,
+                title = stringResource(R.string.profile_help),
+                subtitle = stringResource(R.string.profile_help_desc),
+            )
+        }
+    }
+}
+
+/** 单条设置入口。 */
+@Composable
+private fun ProfileEntry(
+    icon: ImageVector,
+    title: String,
+    subtitle: String,
+    modifier: Modifier = Modifier,
+) {
+    HealthCard(modifier = modifier) {
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Icon(
+                imageVector = icon,
+                contentDescription = null,
+                tint = TextSecondary,
+                modifier = Modifier.size(20.dp),
+            )
+            Column(modifier = Modifier.padding(start = 12.dp)) {
+                Text(text = title, style = MaterialTheme.typography.titleSmall)
+                Text(text = subtitle, style = MaterialTheme.typography.bodySmall, color = TextSecondary)
+            }
+        }
+    }
+}
+
+/** 预览入口：直接渲染 [ProfileScreen]（本页无状态、无示例数据），便于在 IDE 中免真机查看“我的”页效果。 */
+@Preview(showBackground = true)
+@Composable
+private fun ProfileScreenPreview() {
+    RingHealthTheme {
+        ProfileScreen()
     }
 }

app/src/main/res/values/strings.xml

@@ -54,4 +54,17 @@
     <string name="device_switch_on">已开启</string>
     <string name="device_switch_off">已关闭</string>
     <string name="device_settings_hint">阶段一为演示开关，接入戒指后将同步到设备。</string>
+
+    <string name="profile_nickname">健康用户</string>
+    <string name="profile_login_hint">登录后可同步数据（阶段一未开放）</string>
+    <string name="profile_group_app">应用设置</string>
+    <string name="profile_units">单位设置</string>
+    <string name="profile_units_desc">公里 / 公斤</string>
+    <string name="profile_notification">通知权限</string>
+    <string name="profile_notification_desc">接收健康提醒</string>
+    <string name="profile_group_about">关于</string>
+    <string name="profile_check_update">检查更新</string>
+    <string name="profile_check_update_desc">当前版本 0.1.0</string>
+    <string name="profile_help">帮助与反馈</string>
+    <string name="profile_help_desc">常见问题与意见反馈</string>
 </resources>