feat: native tab panel overlay, webapp height no longer reserved

app/src/main/java/top/yeij/hearth/MainActivity.kt

@@ -6,12 +6,15 @@ import android.content.Intent
 import android.content.res.Configuration
 import android.graphics.Bitmap
 import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.drawable.GradientDrawable
 import android.net.Uri
 import android.os.Bundle
 import android.provider.Settings
 import android.text.TextUtils
 import android.util.Base64
 import android.util.Log
+import android.view.Gravity
 import android.view.View
 import android.view.ViewGroup
 import android.view.WindowInsets
@@ -19,6 +22,9 @@ import android.view.WindowInsetsController
 import android.webkit.WebView
 import android.webkit.WebViewClient
 import android.widget.FrameLayout
+import android.widget.LinearLayout
+import android.widget.PopupWindow
+import android.widget.TextView
 import androidx.core.app.NotificationManagerCompat
 import com.google.gson.Gson
 import top.yeij.hearth.app.AndroidAppSource
@@ -51,11 +57,12 @@ class MainActivity : Activity() {
         // Placeholder manifest/catalog URLs; replace with the real server on device
         private const val MANIFEST_URL = "https://example.com/hearth/manifest.json"
         private const val CATALOG_URL = "https://example.com/hearth/catalog.json"
-        // 内容 WebView 顶部预留高度（dp）：顶栏（约 54dp）+ 横向标签面板（约 45dp），
-        // 取 104dp 留余量，确保标签面板完全不被内容 WebView 覆盖
-        // Content WebView top reserve (dp): topbar (~54dp) + horizontal tab panel
-        // (~45dp); use 104dp with margin so the tab panel is never covered
-        private const val TOPBAR_HEIGHT_DP = 104
+        // 内容 WebView 顶部预留高度（dp）：默认只留顶栏（约 54dp）；标签面板弹出时
+        // 通过 setContentTopMargin 临时增大，收起后恢复，避免一直压缩 webapp 高度
+        // Content WebView top reserve (dp): default only the topbar (~54dp); the tab
+        // panel temporarily grows it via setContentTopMargin and restores on collapse,
+        // avoiding permanently shrinking the webapp height
+        private const val TOPBAR_HEIGHT_DP = 56
         // 全局侧边栏收起宽度（dp），内容 WebView 左侧预留，避免挡住侧边栏
         // Global sidebar collapsed width (dp); content WebViews reserve it on the
         // left to avoid covering the sidebar
@@ -197,6 +204,7 @@ class MainActivity : Activity() {
             brightness = brightnessProvider,
             serverUrl = serverUrlProvider,
             wallpaper = wallpaperProvider,
+            onShowTabPanel = { showNativeTabPanel() },
         )
         root = FrameLayout(this)
         setContentView(root)
@@ -347,6 +355,67 @@ class MainActivity : Activity() {
         }
     }
 
+    // 弹出原生标签面板（PopupWindow，在内容 WebView 之上，不占用预留高度）
+    // Show the native tab panel (PopupWindow above the content WebView, no reserved height)
+    private fun showNativeTabPanel() {
+        val tabs = webAppContainer.tabs()
+        if (tabs.isEmpty()) return
+
+        val container = LinearLayout(this).apply {
+            orientation = LinearLayout.VERTICAL
+            setPadding(dp(8), dp(8), dp(8), dp(8))
+            background = GradientDrawable().apply {
+                setColor(0xE6202024.toInt())
+                cornerRadius = dp(16).toFloat()
+            }
+        }
+
+        val popup = PopupWindow(container, dp(220), ViewGroup.LayoutParams.WRAP_CONTENT, true)
+        popup.isOutsideTouchable = true
+        tabs.forEach { tab ->
+            val row = LinearLayout(this).apply {
+                orientation = LinearLayout.HORIZONTAL
+                gravity = Gravity.CENTER_VERTICAL
+                setPadding(dp(12), dp(8), dp(12), dp(8))
+                if (tab.active) background = GradientDrawable().apply {
+                    setColor(Color.parseColor("#ff6900"))
+                    cornerRadius = dp(10).toFloat()
+                }
+            }
+            val name = TextView(this).apply {
+                text = tab.name
+                textSize = 14f
+                setTextColor(Color.WHITE)
+                isSingleLine = true
+                ellipsize = TextUtils.TruncateAt.END
+                layoutParams = LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 1f)
+            }
+            val close = TextView(this).apply {
+                text = "✕"
+                textSize = 14f
+                setTextColor(Color.WHITE)
+                setPadding(dp(10), 0, 0, 0)
+                setOnClickListener {
+                    bridge.closeWebApp(tab.id)
+                    popup.dismiss()
+                }
+            }
+            row.addView(name)
+            row.addView(close)
+            row.setOnClickListener {
+                bridge.switchTab(tab.id)
+                popup.dismiss()
+            }
+            container.addView(row)
+        }
+
+        popup.showAtLocation(root, Gravity.TOP or Gravity.END, dp(16), dp(64))
+    }
+
+    // dp 转 px
+    // dp to px
+    private fun dp(v: Int): Int = (v * resources.displayMetrics.density).toInt()
+
     // 检测通知使用权是否已授予，未授予时打日志提示（UI 引导入口留后续）
     // Check whether notification access is granted; log a hint when not
     // (the settings UI entry is deferred to a later task)

app/src/main/java/top/yeij/hearth/webview/JsBridge.kt

@@ -69,6 +69,11 @@ class JsBridge(
     // 壁纸提供接口（base64）
     // Wallpaper provider (base64)
     private val wallpaper: WallpaperProvider? = null,
+    // 标签面板回调：由 MainActivity 实现，弹出原生标签面板（PopupWindow，在内容
+    // WebView 之上，不占用预留高度）
+    // Tab panel callback implemented by MainActivity: shows a native tab panel
+    // (PopupWindow above the content WebView, no reserved height)
+    private val onShowTabPanel: (() -> Unit)? = null,
 ) {
     private val gson = com.google.gson.Gson()
 
@@ -212,6 +217,14 @@ class JsBridge(
         Log.d("HearthBridge", "hideWebApps called")
     }
 
+    // 弹出原生标签面板（H5 顶栏标签按钮点击时调用）
+    // Show the native tab panel (called when the H5 topbar tab button is tapped)
+    @android.webkit.JavascriptInterface
+    fun showTabPanel() {
+        Log.d("HearthBridge", "showTabPanel called")
+        onShowTabPanel?.invoke()
+    }
+
     // 清单内存缓存：首次拉取成功后缓存，后续复用（避免 openWebApp 重复 I/O）
     // 空结果（离线失败）不缓存，下次调用重试拉取，避免空清单被永久缓存
     // In-memory manifest cache: cache only on a successful non-empty fetch (avoid