feat(heatmap): add HeatmapScreen, navigation route, dashboard entry, i18n strings

- HeatmapScreen with TopAppBar, view switcher (Daily/Weekly/Cumulative), Canvas
- DashboardScreen: new HeatmapEntryCard with CalendarMonth icon
- RainyTokenNavHost: HEATMAP route for both Compact and Expanded layouts
- 9 new string resources across EN/zh-Hans/zh-Hant
- ArrowBack -> AutoMirrored.Filled.ArrowBack (deprecation fix)

app/src/main/java/com/rainy/token/ui/RainyTokenNavHost.kt

@@ -48,6 +48,7 @@ import com.rainy.token.ui.dashboard.UsageDataViewModel
 import com.rainy.token.ui.dashboard.UsageDetailScreen
 import com.rainy.token.ui.dashboard.UsageOverviewScreen
 import com.rainy.token.ui.dashboard.UsageViewModel
+import com.rainy.token.ui.heatmap.HeatmapScreen
 import com.rainy.token.ui.servicedetail.ServiceDetailScreen
 import com.rainy.token.ui.settings.CredentialEditScreen
 import com.rainy.token.ui.settings.SettingsScreen
@@ -83,6 +84,7 @@ object Routes {
     const val CCGO_USAGE_DETAIL = "ccgo_usage_detail"
     const val CCGO_USAGE_OVERVIEW = "ccgo_usage_overview"
     const val CCGO_USAGE_DATA = "ccgo_usage_data"
+    const val HEATMAP = "heatmap"
 }
 
 private fun parseServiceType(typeName: String?): ServiceType =
@@ -96,6 +98,7 @@ private sealed class DetailPane {
     object OCGOUsage : DetailPane()
     object CCGOUsage : DetailPane()
     object Settings : DetailPane()
+    object Heatmap : DetailPane()
 }
 
 @Composable
@@ -191,7 +194,8 @@ private fun CompactNavHost() {
                 onOpenSettings = { navController.navigate(Routes.SETTINGS) },
                 onOpenService = { type -> navController.navigate(Routes.serviceDetail(type)) },
                 onOpenUsageDetail = { navController.navigate(Routes.USAGE_DETAIL) },
-                onOpenCcgoUsageDetail = { navController.navigate(Routes.CCGO_USAGE_DETAIL) }
+                onOpenCcgoUsageDetail = { navController.navigate(Routes.CCGO_USAGE_DETAIL) },
+                onOpenHeatmap = { navController.navigate(Routes.HEATMAP) }
             )
         }
         composable(Routes.USAGE_DETAIL) {
@@ -303,6 +307,9 @@ private fun CompactNavHost() {
                 onStartWebViewLogin = { svc -> navController.navigate(Routes.webviewLogin(svc)) }
             )
         }
+        composable(Routes.HEATMAP) {
+            HeatmapScreen(onBack = guardedPop)
+        }
     }
 }
 
@@ -336,6 +343,7 @@ private fun ExpandedLayout() {
                 onOpenService = { type -> detailPane = DetailPane.ServiceDetail(type) },
                 onOpenUsageDetail = { detailPane = DetailPane.OCGOUsage },
                 onOpenCcgoUsageDetail = { detailPane = DetailPane.CCGOUsage },
+                onOpenHeatmap = { detailPane = DetailPane.Heatmap },
                 viewModel = dashboardVm
             )
         }
@@ -442,6 +450,9 @@ private fun ExpandedDetailPane(
                 }
             }
         }
+        is DetailPane.Heatmap -> {
+            HeatmapScreen(onBack = onClose)
+        }
         is DetailPane.Settings -> {
             val settingsNavController = rememberNavController()
             // 监听嵌套 NavHost 路由变化：当从凭据编辑页/WebView 返回 settings_main 时

app/src/main/java/com/rainy/token/ui/dashboard/DashboardScreen.kt

@@ -29,6 +29,7 @@ import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.CalendarMonth
 import androidx.compose.material.icons.filled.KeyboardArrowRight
 import androidx.compose.material.icons.filled.Refresh
 import androidx.compose.material.icons.filled.Settings
@@ -122,6 +123,7 @@ fun DashboardScreen(
     onOpenService: (ServiceType) -> Unit,
     onOpenUsageDetail: () -> Unit,
     onOpenCcgoUsageDetail: () -> Unit = {},
+    onOpenHeatmap: () -> Unit = {},
     viewModel: DashboardViewModel = hiltViewModel()
 ) {
     // 从设置页返回时重新读取本地凭据状态 + 缓存（不自动发起网络请求）
@@ -280,6 +282,7 @@ fun DashboardScreen(
                             onOpenUsageDetail = onOpenUsageDetail,
                             onOpenCcgoUsageDetail = onOpenCcgoUsageDetail,
                             onOpenService = onOpenService,
+                            onOpenHeatmap = onOpenHeatmap,
                             refreshTrigger = usageSyncTrigger
                         )
                         DraggableDashboardCards(
@@ -346,6 +349,7 @@ private const val DASHBOARD_ORDER_KEY = "order"
 private const val USAGE_OCGO_CARD_ID = "usage:opencode_go"
 private const val USAGE_CCGO_CARD_ID = "usage:commandcode_go"
 private const val DASHBOARD_CARD_SPACING_DP = 12
+private const val HEATMAP_CARD_ID = "heatmap"
 
 private data class DashboardHomeItem(
     val id: String,
@@ -359,6 +363,7 @@ private fun rememberDashboardItems(
     onOpenUsageDetail: () -> Unit,
     onOpenCcgoUsageDetail: () -> Unit,
     onOpenService: (ServiceType) -> Unit,
+    onOpenHeatmap: () -> Unit,
     refreshTrigger: Int
 ): List<DashboardHomeItem> {
     val defaultItems = buildList {
@@ -368,6 +373,9 @@ private fun rememberDashboardItems(
         add(DashboardHomeItem(USAGE_CCGO_CARD_ID) {
             CommandCodeUsageStatsCard(onOpenDetail = onOpenCcgoUsageDetail, refreshTrigger = refreshTrigger)
         })
+        add(DashboardHomeItem(HEATMAP_CARD_ID) {
+            HeatmapEntryCard(onOpenHeatmap = onOpenHeatmap)
+        })
         cards.forEach { card ->
             add(DashboardHomeItem("service:${card.service.storageKey}") {
                 DashboardCard(
@@ -685,6 +693,54 @@ private fun DashboardCard(card: DashboardCardUi, onClick: () -> Unit, onOpenUsag
     }
 }
 
+/**
+ * Token 活动热力图入口卡片。
+ * 白底圆角，左侧日历图标，中间标题，右侧箭头，点击跳转热力图页面。
+ */
+@Composable
+private fun HeatmapEntryCard(onOpenHeatmap: () -> Unit) {
+    Card(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { onOpenHeatmap() },
+        shape = RoundedCornerShape(20.dp),
+        colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surface),
+        elevation = CardDefaults.cardElevation(defaultElevation = 0.dp)
+    ) {
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Icon(
+                imageVector = Icons.Filled.CalendarMonth,
+                contentDescription = null,
+                tint = StrawberryPink,
+                modifier = Modifier.size(44.dp)
+            )
+            Spacer(modifier = Modifier.width(12.dp))
+            Column(modifier = Modifier.weight(1f)) {
+                Text(
+                    text = stringResource(R.string.heatmap_entry),
+                    style = MaterialTheme.typography.titleMedium,
+                    fontWeight = FontWeight.SemiBold
+                )
+                Text(
+                    text = stringResource(R.string.heatmap_entry_subtitle),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = inkMuted()
+                )
+            }
+            Icon(
+                imageVector = Icons.Filled.KeyboardArrowRight,
+                contentDescription = null,
+                tint = StrawberryPink
+            )
+        }
+    }
+}
+
 /**
  * 仪表盘底部 footer：填空白 + 显示版本号。
  * 容器透明无边框，让卡片列表与背景融合自然。

app/src/main/java/com/rainy/token/ui/heatmap/HeatmapScreen.kt

@@ -0,0 +1,110 @@
+package com.rainy.token.ui.heatmap
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.rainy.token.R
+import com.rainy.token.ui.theme.inkMuted
+
+/**
+ * Token 活动热力图页面。
+ *
+ * Scaffold + TopAppBar 布局，包含视图切换器（每日/每周/累计）和 HeatmapCanvas。
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun HeatmapScreen(
+    onBack: () -> Unit,
+    viewModel: HeatmapViewModel = hiltViewModel()
+) {
+    val state by viewModel.uiState.collectAsStateWithLifecycle()
+
+    LaunchedEffect(Unit) {
+        viewModel.load()
+    }
+
+    Scaffold(
+        containerColor = Color.Transparent,
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.heatmap_title)) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = stringResource(R.string.action_back))
+                    }
+                },
+                colors = TopAppBarDefaults.topAppBarColors(containerColor = Color.Transparent)
+            )
+        }
+    ) { innerPadding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(innerPadding)
+                .verticalScroll(rememberScrollState())
+                .padding(horizontal = 16.dp, vertical = 8.dp)
+        ) {
+            // ── 视图切换器 ──
+            Row(
+                horizontalArrangement = Arrangement.spacedBy(16.dp),
+                modifier = Modifier.padding(horizontal = 4.dp, bottom = 12.dp)
+            ) {
+                HeatmapViewMode.entries.forEach { mode ->
+                    val label = when (mode) {
+                        HeatmapViewMode.DAILY -> stringResource(R.string.heatmap_view_daily)
+                        HeatmapViewMode.WEEKLY -> stringResource(R.string.heatmap_view_weekly)
+                        HeatmapViewMode.CUMULATIVE -> stringResource(R.string.heatmap_view_cumulative)
+                    }
+                    val isSelected = state.viewMode == mode
+                    Text(
+                        text = label,
+                        style = MaterialTheme.typography.bodyMedium,
+                        fontWeight = if (isSelected) FontWeight.Medium else FontWeight.Normal,
+                        color = if (isSelected) MaterialTheme.colorScheme.onSurface else inkMuted(),
+                        modifier = Modifier.clickable { viewModel.setViewMode(mode) }
+                    )
+                }
+            }
+
+            // ── 热力图 Canvas ──
+            HeatmapCanvas(
+                state = state,
+                onDayClick = { dayData ->
+                    // Phase 4: 显示浮层
+                },
+                onWeekClick = { weekData ->
+                    // Phase 4: 显示浮层
+                }
+            )
+
+            Spacer(modifier = Modifier.height(32.dp))
+        }
+    }
+}

app/src/main/res/values-b+zh+Hans/strings.xml

@@ -492,4 +492,15 @@
     <string name="action_submit_callback">提交回调 URL</string>
     <string name="action_regenerate_link">重新生成授权链接</string>
     <string name="oauth_preparing">正在准备授权...</string>
+
+    <!-- ══════════ Token 活动热力图 ══════════ -->
+    <string name="heatmap_title">Token 活动</string>
+    <string name="heatmap_view_daily">每日</string>
+    <string name="heatmap_view_weekly">每周</string>
+    <string name="heatmap_view_cumulative">累计</string>
+    <string name="heatmap_entry">Token 活动</string>
+    <string name="heatmap_entry_subtitle">每日 Token 使用热力图</string>
+    <string name="heatmap_no_data">暂无数据</string>
+    <string name="heatmap_legend_less">少</string>
+    <string name="heatmap_legend_more">多</string>
 </resources>

app/src/main/res/values-b+zh+Hant/strings.xml

@@ -492,4 +492,15 @@
     <string name="action_submit_callback">提交回撥 URL</string>
     <string name="action_regenerate_link">重新生成授權連結</string>
     <string name="oauth_preparing">正在準備授權...</string>
+
+    <!-- ══════════ Token 活动热力图 ══════════ -->
+    <string name="heatmap_title">Token 活動</string>
+    <string name="heatmap_view_daily">每日</string>
+    <string name="heatmap_view_weekly">每週</string>
+    <string name="heatmap_view_cumulative">累計</string>
+    <string name="heatmap_entry">Token 活動</string>
+    <string name="heatmap_entry_subtitle">每日 Token 使用熱力圖</string>
+    <string name="heatmap_no_data">暫無資料</string>
+    <string name="heatmap_legend_less">少</string>
+    <string name="heatmap_legend_more">多</string>
 </resources>

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

@@ -495,4 +495,15 @@
     <string name="action_submit_callback">Submit callback URL</string>
     <string name="action_regenerate_link">Regenerate auth link</string>
     <string name="oauth_preparing">Preparing authorization...</string>
+
+    <!-- ══════════ Token 活动热力图 ══════════ -->
+    <string name="heatmap_title">Token Activity</string>
+    <string name="heatmap_view_daily">Daily</string>
+    <string name="heatmap_view_weekly">Weekly</string>
+    <string name="heatmap_view_cumulative">Cumulative</string>
+    <string name="heatmap_entry">Token Activity</string>
+    <string name="heatmap_entry_subtitle">Daily Token usage heatmap</string>
+    <string name="heatmap_no_data">No data yet</string>
+    <string name="heatmap_legend_less">Less</string>
+    <string name="heatmap_legend_more">More</string>
 </resources>