android: camera-style controls - 4-item top bar (ffc/zoom/trace/palette), shutter row (gallery/photo/record) above nav

android/app/src/main/kotlin/com/mag160c/thermal/ui/AppRoot.kt

@@ -59,7 +59,7 @@ fun AppRoot() {
 
     Box(modifier = Modifier.fillMaxSize()) {
         when (tab) {
-            0 -> LiveScreen()
+            0 -> LiveScreen(onOpenGallery = { tab = 1 })
             1 -> Column(modifier = Modifier.fillMaxSize().padding(bottom = 84.dp)) {
                 GalleryScreen()
             }

android/app/src/main/kotlin/com/mag160c/thermal/ui/live/LiveScreen.kt

@@ -1,24 +1,32 @@
 package com.mag160c.thermal.ui.live
 
+import android.view.SurfaceView
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.gestures.detectTapGestures
+import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.WindowInsets
 import androidx.compose.foundation.layout.WindowInsetsSides
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.offset
 import androidx.compose.foundation.layout.only
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.safeDrawing
+import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.windowInsetsPadding
 import androidx.compose.foundation.lazy.grid.GridCells
 import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
 import androidx.compose.foundation.lazy.grid.items
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
@@ -31,41 +39,47 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.layout.onSizeChanged
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.viewinterop.AndroidView
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.mag160c.thermal.R
 import com.mag160c.thermal.core.Palettes
-import android.view.SurfaceView
+import com.mag160c.thermal.ui.DeviceOrientation
+import com.mag160c.thermal.ui.UiInsets
 
 /**
- * Stable single-branch live view: one SurfaceView for the whole screen, a
- * control TOP bar (always visible) and the bottom navigation overlay.
- * The activity is portrait-locked, so the whole composition (top bar /
- * image region / bottom bar) is glued to the phone's portrait frame and
- * never moves or rotates, however the phone is physically held — the on-
- * screen area always matches the thermal lens direction.  The bars' icons
- * and text are pre-rotated by the physical grip angle (DeviceOrientation)
- * so they stay readable in any grip.
+ * Stable single-branch live view, camera-app style:
+ *  - control TOP bar (glued to the portrait top edge): FFC / zoom / max-temp
+ *    trace / palette, each with a tiny label, pre-rotated by the grip angle;
+ *  - camera shutter row above the bottom navigation: gallery shortcut, big
+ *    photo shutter, record/stop;
+ *  - the image region stays glued to the phone's portrait frame (matches the
+ *    lens direction) and never moves; OSD text compensates the grip angle.
  */
 @Composable
-fun LiveScreen(vm: LiveViewModel = viewModel()) {
+fun LiveScreen(vm: LiveViewModel = viewModel(), onOpenGallery: () -> Unit = {}) {
     val state by vm.state.collectAsState()
     val context = LocalContext.current
-    val phi by com.mag160c.thermal.ui.DeviceOrientation.deg.collectAsState()
+    val phi by DeviceOrientation.deg.collectAsState()
+    val density = LocalDensity.current.density
     var showPalette by remember { mutableStateOf(false) }
+    var navPx by remember { mutableStateOf(UiInsets.navPx) }
+    var shutterPx by remember { mutableStateOf(0) }
 
     LaunchedEffect(Unit) {
         vm.connect()
-        vm.uiBottomPx = com.mag160c.thermal.ui.UiInsets.navPx
+        vm.uiBottomPx = navPx + shutterPx
         while (true) {
-            kotlinx.coroutines.delay(500)
-            vm.uiBottomPx = com.mag160c.thermal.ui.UiInsets.navPx
+            kotlinx.coroutines.delay(400)
+            navPx = UiInsets.navPx
+            vm.uiBottomPx = navPx + shutterPx
             vm.refreshTemps()
         }
     }
@@ -101,7 +115,6 @@ fun LiveScreen(vm: LiveViewModel = viewModel()) {
             modifier = Modifier
                 .align(Alignment.TopCenter)
                 .fillMaxWidth()
-                // cutout / status-bar safe area (punch-hole phones)
                 .windowInsetsPadding(
                     WindowInsets.safeDrawing
                         .only(WindowInsetsSides.Top),
@@ -111,49 +124,154 @@ fun LiveScreen(vm: LiveViewModel = viewModel()) {
             Row(
                 modifier = Modifier
                     .fillMaxWidth()
-                    .padding(vertical = 4.dp),
+                    .padding(vertical = 6.dp),
                 verticalAlignment = Alignment.CenterVertically,
             ) {
-                Box(modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() }, contentAlignment = Alignment.Center) {
-                    IconButton(onClick = { vm.triggerFfc() }) {
+                Box(
+                    modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() },
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Column(
+                        horizontalAlignment = Alignment.CenterHorizontally,
+                        modifier = Modifier.clickable { vm.triggerFfc() }.padding(4.dp),
+                    ) {
                         Icon(painterResource(R.drawable.ic_ffc), "FFC 快门校正")
+                        Text("FFC", style = MaterialTheme.typography.labelSmall)
                     }
                 }
-                Box(modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() }, contentAlignment = Alignment.Center) {
-                    IconButton(onClick = { vm.setZoom(vm.state.value.zoom % 4 + 1) }) {
-                        Icon(painterResource(R.drawable.ic_zoom), "数码变倍 x${state.zoom}")
+                Box(
+                    modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() },
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Column(
+                        horizontalAlignment = Alignment.CenterHorizontally,
+                        modifier = Modifier.clickable {
+                            vm.setZoom(vm.state.value.zoom % 4 + 1)
+                        }.padding(4.dp),
+                    ) {
+                        Icon(painterResource(R.drawable.ic_zoom), "数码变倍")
+                        Text("${state.zoom}×", style = MaterialTheme.typography.labelSmall)
                     }
                 }
-                Box(modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() }, contentAlignment = Alignment.Center) {
-                    Text(
-                        text = if (state.maxTraceOn) "追踪·开" else "追踪",
-                        style = MaterialTheme.typography.labelMedium,
-                        color = if (state.maxTraceOn) MaterialTheme.colorScheme.primary
-                        else MaterialTheme.colorScheme.onSurfaceVariant,
-                        modifier = Modifier.clickable { vm.toggleMaxTrace() },
-                    )
+                Box(
+                    modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() },
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Column(
+                        horizontalAlignment = Alignment.CenterHorizontally,
+                        modifier = Modifier.clickable { vm.toggleMaxTrace() }.padding(4.dp),
+                    ) {
+                        val on = state.maxTraceOn
+                        Icon(
+                            painterResource(R.drawable.ic_target), "最高温追踪",
+                            tint = if (on) MaterialTheme.colorScheme.primary
+                            else MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                        Text(
+                            if (on) "追踪·开" else "追踪",
+                            style = MaterialTheme.typography.labelSmall,
+                            color = if (on) MaterialTheme.colorScheme.primary
+                            else MaterialTheme.colorScheme.onSurfaceVariant,
+                        )
+                    }
                 }
-                Box(modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() }, contentAlignment = Alignment.Center) {
-                    IconButton(onClick = { showPalette = true }) {
+                Box(
+                    modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() },
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Column(
+                        horizontalAlignment = Alignment.CenterHorizontally,
+                        modifier = Modifier.clickable { showPalette = true }.padding(4.dp),
+                    ) {
                         Icon(painterResource(R.drawable.ic_palette), "调色板")
+                        Text(
+                            Palettes.NAMES[state.paletteIndex],
+                            style = MaterialTheme.typography.labelSmall,
+                        )
                     }
                 }
-                Box(modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() }, contentAlignment = Alignment.Center) {
-                    IconButton(onClick = { vm.capturePhoto(context) }) {
-                        Icon(painterResource(R.drawable.ic_camera), "拍照")
+            }
+        }
+
+        // ---- camera shutter row above the bottom navigation (live tab) ----
+        val recording = state.status == "recording"
+        Row(
+            modifier = Modifier
+                .align(Alignment.BottomCenter)
+                .offset(y = -(navPx / density).dp)
+                .onSizeChanged {
+                    shutterPx = it.height
+                    vm.uiBottomPx = navPx + shutterPx
+                }
+                .fillMaxWidth()
+                .padding(vertical = 10.dp),
+            horizontalArrangement = Arrangement.spacedBy(52.dp, Alignment.CenterHorizontally),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Column(
+                horizontalAlignment = Alignment.CenterHorizontally,
+                modifier = Modifier.graphicsLayer { rotationZ = -phi.toFloat() },
+            ) {
+                Box(
+                    modifier = Modifier
+                        .size(52.dp)
+                        .background(Color(0x59FFFFFF), CircleShape)
+                        .clickable { onOpenGallery() },
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Icon(painterResource(R.drawable.ic_gallery), null, tint = Color.White)
+                }
+                Text(
+                    "相册", color = Color.White,
+                    style = MaterialTheme.typography.labelSmall,
+                )
+            }
+            Column(
+                horizontalAlignment = Alignment.CenterHorizontally,
+                modifier = Modifier.graphicsLayer { rotationZ = -phi.toFloat() },
+            ) {
+                Box(
+                    modifier = Modifier
+                        .size(74.dp)
+                        .border(4.dp, Color.White, CircleShape)
+                        .padding(6.dp)
+                        .background(Color.White, CircleShape)
+                        .clickable { vm.capturePhoto(context) },
+                )
+                Text(
+                    "拍照", color = Color.White,
+                    style = MaterialTheme.typography.labelSmall,
+                )
+            }
+            Column(
+                horizontalAlignment = Alignment.CenterHorizontally,
+                modifier = Modifier.graphicsLayer { rotationZ = -phi.toFloat() },
+            ) {
+                Box(
+                    modifier = Modifier
+                        .size(52.dp)
+                        .border(3.dp, Color(0xFFFF5252), CircleShape)
+                        .clickable { vm.toggleRecording(context) },
+                    contentAlignment = Alignment.Center,
+                ) {
+                    if (recording) {
+                        Box(
+                            modifier = Modifier
+                                .size(20.dp)
+                                .background(Color(0xFFFF5252), RoundedCornerShape(4.dp)),
+                        )
+                    } else {
+                        Box(
+                            modifier = Modifier
+                                .size(24.dp)
+                                .background(Color(0xFFFF5252), CircleShape),
+                        )
                     }
                 }
-                Box(modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() }, contentAlignment = Alignment.Center) {
-                    IconButton(onClick = { vm.toggleRecording(context) }) {
-                        Icon(painterResource(R.drawable.ic_record), "录像")
-                    }
-                }
-                Box(modifier = Modifier.weight(1f).graphicsLayer { rotationZ = -phi.toFloat() }, contentAlignment = Alignment.Center) {
-                    Text(
-                        text = Palettes.NAMES[state.paletteIndex],
-                        style = MaterialTheme.typography.labelMedium,
-                    )
-                }
+                Text(
+                    if (recording) "停止" else "录像", color = Color.White,
+                    style = MaterialTheme.typography.labelSmall,
+                )
             }
         }
     }

android/app/src/main/res/drawable/ic_target.xml

@@ -0,0 +1,8 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:width="24dp" android:height="24dp" android:viewportWidth="24" android:viewportHeight="24">
+  <path android:pathData="M5,12a7,7 0 1,0 14,0a7,7 0 1,0 -14,0z" android:strokeColor="#FF000000" android:strokeWidth="2.5" android:fillColor="#00000000" />
+  <path android:pathData="M12,1.5 L12,5.5" android:strokeColor="#FF000000" android:strokeWidth="2.5" />
+  <path android:pathData="M12,18.5 L12,22.5" android:strokeColor="#FF000000" android:strokeWidth="2.5" />
+  <path android:pathData="M1.5,12 L5.5,12" android:strokeColor="#FF000000" android:strokeWidth="2.5" />
+  <path android:pathData="M18.5,12 L22.5,12" android:strokeColor="#FF000000" android:strokeWidth="2.5" />
+  <path android:pathData="M10.9,12a1.1,1.1 0 1,0 2.2,0a1.1,1.1 0 1,0 -2.2,0z" android:fillColor="#FF000000" />
+</vector>

docs/android_app/HANDOFF_DEVELOPMENT.md

@@ -118,9 +118,10 @@ res/drawable/*.xml          自绘矢量图标（双弧圆等可靠几何图形
 - **图像恒 90°CW 绘制为 3:4 竖向**，填满可用区域（顶栏下~底导航上）。
 - **文字/图标恒屏幕水平**（可读）；标记文字位置自动跟随（probeToScreen 固定 90° 映射：
   `fx=1-sy/120, fy=sx/160`）。
-- 顶栏=控制项（FFC/变倍/追踪·开/调色板/拍照/录像/调色板名），恒在顶部，`safeDrawing`
-  顶部inset 适配挖孔屏。
-- 底栏=导航恒在底部。
+- 顶栏=4 个相机控制项（FFC / 变倍×N / 追踪·开 / 调色板+名称），恒在顶部并带小字
+  标签，`safeDrawing` 顶部inset 适配挖孔屏。
+- 底部（仅实时页）导航栏上方为**相机快门区**：相册快捷入口 / 大快门拍照 /
+  录像-停止；快门区高度并入 `vm.uiBottomPx`（= 导航高+快门区高）。
 - 顶栏高度经 `onSizeChanged`→`vm.uiTopPx`；底导航高度经 `UiInsets.navPx`→`vm.uiBottomPx`，渲染器据此留白。
 - 演示模式：无设备时用真实管线+DDT渲染合成帧（热块场景），demo温度用局部线性显示映射
   （真机温度走管线数学；绝对温度标定待真机）。

docs/android_app/session_state.md

@@ -166,6 +166,19 @@
       正持显示，90/180/270 补偿几何不变（preview_fix_pose*_v7.png）。
 - [x] 单元测试全过；APK 已更新。
 
+## 用户反馈修复 第八轮（2026-09-07，相机式按键布局）
+
+- [x] **顶栏精简为 4 个相机控制项**（左→右，带小字标签，随持机朝向补偿旋转）：
+      FFC 校正 / 数码变倍（显示当前 1×/2×/4×，点击循环）/ 最高温追踪开关（追踪·开，
+      高亮+新 ic_target 准星图标）/ 调色板（显示当前调色板名，点击弹出选择）。
+- [x] **底部新增相机快门区**（仅实时页，位于底导航上方，白/红色调）：
+      相册快捷入口（跳转媒体库页签）/ 大圆形快门=拍照 / 录像-停止（红圈，录像中
+      红圈内容变红色方块）。快门区高度并入渲染器底部 inset（vm.uiBottomPx =
+      导航高+快门区高），测温点点击映射同步排除该区域。
+- [x] 底部导航（实时/相册/分析/设置）不变；快门区内容同样按持机朝向补偿旋转。
+- [x] 模拟器实测：0°/90° 姿态布局、旋转补偿、图像区域均正确
+      （preview_ui_v8.png / preview_ui90_v8.png）；单元测试全过；APK 已更新。
+
 ## 待办
 
 - 真机USB实测（温度绝对值标定、FFC/录像/MDT保存端到端）