Improve mobile recorder focus mode

client/src/pages/Recorder.tsx

@@ -27,6 +27,8 @@ import {
   Download,
   FlipHorizontal,
   Loader2,
+  Maximize2,
+  Minimize2,
   MonitorUp,
   Scissors,
   ShieldAlert,
@@ -95,7 +97,10 @@ function waitForIceGathering(peer: RTCPeerConnection) {
 }
 
 function isMobileDevice() {
-  return /Android|iPhone|iPad|iPod/i.test(navigator.userAgent);
+  return (
+    /Android|iPhone|iPad|iPod/i.test(navigator.userAgent) ||
+    window.matchMedia("(max-width: 768px)").matches
+  );
 }
 
 function getArchiveProgress(session: MediaSession | null) {
@@ -164,6 +169,7 @@ export default function Recorder() {
   const [mediaSession, setMediaSession] = useState<MediaSession | null>(null);
   const [markers, setMarkers] = useState<MediaMarker[]>([]);
   const [connectionState, setConnectionState] = useState<RTCPeerConnectionState>("new");
+  const [immersivePreview, setImmersivePreview] = useState(false);
 
   const mobile = useMemo(() => isMobileDevice(), []);
   const mimeType = useMemo(() => pickRecorderMimeType(), []);
@@ -712,7 +718,40 @@ export default function Recorder() {
       return;
     }
     playbackVideoRef.current.load();
-  }, [currentPlaybackUrl, mode]);
+  }, [currentPlaybackUrl, immersivePreview, mode]);
+
+  useEffect(() => {
+    if (mode === "archived") {
+      return;
+    }
+
+    const liveVideo = liveVideoRef.current;
+    if (!liveVideo || !streamRef.current) {
+      return;
+    }
+
+    if (liveVideo.srcObject !== streamRef.current) {
+      liveVideo.srcObject = streamRef.current;
+    }
+    liveVideo.play().catch(() => {});
+  }, [cameraActive, immersivePreview, mode]);
+
+  useEffect(() => {
+    if (!mobile) {
+      setImmersivePreview(false);
+      return;
+    }
+
+    if (!immersivePreview) {
+      document.body.style.overflow = "";
+      return;
+    }
+
+    document.body.style.overflow = "hidden";
+    return () => {
+      document.body.style.overflow = "";
+    };
+  }, [immersivePreview, mobile]);
 
   useEffect(() => {
     return () => {
@@ -751,6 +790,156 @@ export default function Recorder() {
 
   const previewTitle = mode === "archived" ? "归档回放" : "实时取景";
   const StatusIcon = statusBadge.icon;
+  const previewVideoClassName = immersivePreview && mobile
+    ? "h-full w-full object-contain"
+    : "h-full w-full object-contain";
+  const railButtonClassName =
+    "h-16 w-16 flex-col gap-1 rounded-[20px] px-2 text-[11px] leading-tight shadow-lg shadow-black/20";
+
+  const renderPrimaryActions = (layout: "toolbar" | "rail" = "toolbar") => {
+    const rail = layout === "rail";
+    const labelFor = (full: string, short: string) => (rail ? short : full);
+    const buttonClass = (tone: "default" | "outline" | "destructive" | "record" = "default") => {
+      if (!rail) {
+        switch (tone) {
+          case "outline":
+            return "h-12 rounded-2xl px-4";
+          case "destructive":
+            return "h-12 rounded-2xl px-5";
+          case "record":
+            return "h-12 rounded-2xl bg-red-600 px-5 hover:bg-red-700";
+          default:
+            return "h-12 rounded-2xl px-5";
+        }
+      }
+
+      switch (tone) {
+        case "outline":
+          return `${railButtonClassName} border-white/15 bg-white/8 text-white hover:bg-white/14`;
+        case "destructive":
+          return `${railButtonClassName} bg-red-600 text-white hover:bg-red-700`;
+        case "record":
+          return `${railButtonClassName} bg-red-600 text-white hover:bg-red-700`;
+        default:
+          return `${railButtonClassName} bg-white text-slate-950 hover:bg-white/90`;
+      }
+    };
+
+    const iconClass = rail ? "h-5 w-5" : "mr-2 h-4 w-4";
+
+    return (
+      <>
+        {mode === "idle" && (
+          <>
+            {!cameraActive ? (
+              <Button
+                data-testid="recorder-start-camera-button"
+                onClick={() => void startCamera()}
+                className={buttonClass()}
+              >
+                <Camera className={iconClass} />
+                {labelFor("启动摄像头", "启动")}
+              </Button>
+            ) : (
+              <>
+                <Button
+                  data-testid="recorder-start-recording-button"
+                  onClick={() => void beginRecording()}
+                  className={buttonClass("record")}
+                >
+                  <Circle className={`${iconClass} ${rail ? "fill-current" : "fill-current"}`} />
+                  {labelFor("开始录制", "录制")}
+                </Button>
+                <Button variant="outline" onClick={stopCamera} className={buttonClass("outline")}>
+                  <VideoOff className={iconClass} />
+                  {labelFor("关闭摄像头", "关闭")}
+                </Button>
+              </>
+            )}
+            {hasMultipleCameras && (
+              <Button variant="outline" onClick={() => void flipCamera()} className={buttonClass("outline")}>
+                <FlipHorizontal className={iconClass} />
+                {labelFor("切换摄像头", "切换")}
+              </Button>
+            )}
+          </>
+        )}
+
+        {(mode === "recording" || mode === "reconnecting") && (
+          <>
+            <Button
+              data-testid="recorder-marker-button"
+              variant="outline"
+              onClick={() => void createManualMarker("manual", "手动剪辑点")}
+              className={buttonClass("outline")}
+            >
+              <Scissors className={iconClass} />
+              {labelFor("标记剪辑点", "标记")}
+            </Button>
+            <Button
+              data-testid="recorder-finish-button"
+              variant="destructive"
+              onClick={() => void finishRecording()}
+              className={buttonClass("destructive")}
+            >
+              <CloudUpload className={iconClass} />
+              {labelFor("结束并归档", "完成")}
+            </Button>
+          </>
+        )}
+
+        {mode === "archived" && (
+          <>
+            {currentPlaybackUrl && (
+              <Button asChild variant="outline" className={buttonClass("outline")}>
+                <a href={currentPlaybackUrl} download target="_blank" rel="noreferrer">
+                  <Download className={iconClass} />
+                  {labelFor("下载回放", "下载")}
+                </a>
+              </Button>
+            )}
+            <Button
+              data-testid="recorder-reset-button"
+              onClick={() => void resetRecorder()}
+              className={buttonClass()}
+            >
+              {rail ? null : null}
+              {labelFor("重新录制", "重来")}
+            </Button>
+          </>
+        )}
+
+        {mode === "finalizing" && (
+          <Button disabled className={rail ? `${railButtonClassName} bg-white/15 text-white` : "h-12 rounded-2xl px-5"}>
+            <Loader2 className={rail ? "h-5 w-5 animate-spin" : "mr-2 h-4 w-4 animate-spin"} />
+            {labelFor("正在生成回放", "处理中")}
+          </Button>
+        )}
+      </>
+    );
+  };
+
+  const renderPreviewMedia = () => (
+    <>
+      {mode === "archived" && currentPlaybackUrl ? (
+        <video
+          ref={playbackVideoRef}
+          className={previewVideoClassName}
+          src={currentPlaybackUrl}
+          controls
+          playsInline
+        />
+      ) : (
+        <video
+          ref={liveVideoRef}
+          className={previewVideoClassName}
+          playsInline
+          muted
+          autoPlay
+        />
+      )}
+    </>
+  );
 
   return (
     <div className="no-overscroll mobile-safe-bottom mobile-safe-inline mobile-bottom-spacing space-y-4">
@@ -804,23 +993,7 @@ export default function Recorder() {
           <Card className="overflow-hidden border-0 shadow-lg">
             <CardContent className="p-0">
               <div className="relative aspect-[16/10] overflow-hidden bg-black sm:aspect-video">
-                {mode === "archived" && currentPlaybackUrl ? (
-                  <video
-                    ref={playbackVideoRef}
-                    className="h-full w-full object-contain"
-                    src={currentPlaybackUrl}
-                    controls
-                    playsInline
-                  />
-                ) : (
-                  <video
-                    ref={liveVideoRef}
-                    className="h-full w-full object-contain"
-                    playsInline
-                    muted
-                    autoPlay
-                  />
-                )}
+                {!immersivePreview && renderPreviewMedia()}
 
                 {!cameraActive && mode === "idle" && (
                   <div className="absolute inset-0 flex flex-col items-center justify-center gap-4 bg-[radial-gradient(circle_at_center,_rgba(16,185,129,0.12),_rgba(0,0,0,0.75))] px-6 text-center text-white/80">
@@ -858,6 +1031,19 @@ export default function Recorder() {
                     {formatRecordingTime(durationMs)}
                   </div>
                 )}
+
+                {mobile && (
+                  <Button
+                    type="button"
+                    size="icon"
+                    variant="secondary"
+                    data-testid="recorder-mobile-focus-button"
+                    onClick={() => setImmersivePreview(true)}
+                    className="absolute right-3 top-3 z-20 h-11 w-11 rounded-full border border-white/10 bg-black/60 text-white shadow-lg hover:bg-black/75"
+                  >
+                    <Maximize2 className="h-4 w-4" />
+                  </Button>
+                )}
               </div>
 
               <div className="border-t border-border/60 bg-card/80 p-4">
@@ -869,69 +1055,7 @@ export default function Recorder() {
                     className="h-12 rounded-2xl border-border/60"
                   />
                   <div className="flex flex-wrap gap-2">
-                    {mode === "idle" && (
-                      <>
-                        {!cameraActive ? (
-                          <Button data-testid="recorder-start-camera-button" onClick={() => void startCamera()} className="h-12 rounded-2xl px-5">
-                            <Camera className="mr-2 h-4 w-4" />
-                            启动摄像头
-                          </Button>
-                        ) : (
-                          <>
-                            <Button data-testid="recorder-start-recording-button" onClick={() => void beginRecording()} className="h-12 rounded-2xl bg-red-600 px-5 hover:bg-red-700">
-                              <Circle className="mr-2 h-4 w-4 fill-current" />
-                              开始录制
-                            </Button>
-                            <Button variant="outline" onClick={stopCamera} className="h-12 rounded-2xl px-4">
-                              <VideoOff className="mr-2 h-4 w-4" />
-                              关闭摄像头
-                            </Button>
-                          </>
-                        )}
-                        {hasMultipleCameras && (
-                          <Button variant="outline" onClick={() => void flipCamera()} className="h-12 rounded-2xl px-4">
-                            <FlipHorizontal className="mr-2 h-4 w-4" />
-                            切换摄像头
-                          </Button>
-                        )}
-                      </>
-                    )}
-
-                    {(mode === "recording" || mode === "reconnecting") && (
-                      <>
-                        <Button data-testid="recorder-marker-button" variant="outline" onClick={() => void createManualMarker("manual", "手动剪辑点")} className="h-12 rounded-2xl px-4">
-                          <Scissors className="mr-2 h-4 w-4" />
-                          标记剪辑点
-                        </Button>
-                        <Button data-testid="recorder-finish-button" variant="destructive" onClick={() => void finishRecording()} className="h-12 rounded-2xl px-5">
-                          <CloudUpload className="mr-2 h-4 w-4" />
-                          结束并归档
-                        </Button>
-                      </>
-                    )}
-
-                    {mode === "archived" && (
-                      <>
-                        {currentPlaybackUrl && (
-                          <Button asChild variant="outline" className="h-12 rounded-2xl px-4">
-                            <a href={currentPlaybackUrl} download target="_blank" rel="noreferrer">
-                              <Download className="mr-2 h-4 w-4" />
-                              下载回放
-                            </a>
-                          </Button>
-                        )}
-                        <Button data-testid="recorder-reset-button" onClick={() => void resetRecorder()} className="h-12 rounded-2xl px-5">
-                          重新录制
-                        </Button>
-                      </>
-                    )}
-
-                    {mode === "finalizing" && (
-                      <Button disabled className="h-12 rounded-2xl px-5">
-                        <Loader2 className="mr-2 h-4 w-4 animate-spin" />
-                        正在生成回放
-                      </Button>
-                    )}
+                    {renderPrimaryActions()}
                   </div>
                 </div>
               </div>
@@ -1088,6 +1212,66 @@ export default function Recorder() {
           </Card>
         </aside>
       </div>
+
+      {mobile && immersivePreview && (
+        <div
+          className="mobile-safe-top mobile-safe-bottom mobile-safe-inline fixed inset-0 z-[80] bg-black/95 px-3 py-4"
+          data-testid="recorder-mobile-focus-shell"
+        >
+          <div className="grid h-full grid-cols-[minmax(0,1fr)_72px] gap-3">
+            <div className="relative flex min-h-0 items-center justify-center">
+              <div className="relative h-full w-full overflow-hidden rounded-[32px] border border-white/10 bg-black shadow-2xl shadow-black/40">
+                {renderPreviewMedia()}
+
+                {!cameraActive && mode === "idle" && (
+                  <div className="absolute inset-0 flex flex-col items-center justify-center gap-4 bg-[radial-gradient(circle_at_center,_rgba(16,185,129,0.12),_rgba(0,0,0,0.8))] px-6 text-center text-white/80">
+                    <VideoOff className="h-14 w-14" />
+                    <div className="space-y-1">
+                      <h2 className="text-xl font-medium">竖屏专注录制</h2>
+                      <p className="text-sm text-white/60">右侧按钮可直接启动摄像头、录制、标记和结束归档。</p>
+                    </div>
+                  </div>
+                )}
+
+                <div className="pointer-events-none absolute left-3 top-3 flex flex-wrap gap-2">
+                  <Badge className="gap-1.5 bg-black/55 text-white shadow-sm">
+                    <Sparkles className="h-3.5 w-3.5" />
+                    {previewTitle}
+                  </Badge>
+                  <Badge className="gap-1.5 bg-black/55 text-white shadow-sm">
+                    <Zap className="h-3.5 w-3.5" />
+                    {QUALITY_PRESETS[qualityPreset].subtitle}
+                  </Badge>
+                </div>
+
+                {(mode === "recording" || mode === "reconnecting") && (
+                  <div className="absolute bottom-3 left-3 flex items-center gap-2 rounded-full bg-black/65 px-3 py-2 text-sm text-white shadow-lg">
+                    <span className="relative flex h-3 w-3">
+                      <span className="absolute inline-flex h-full w-full animate-ping rounded-full bg-red-400 opacity-75" />
+                      <span className="relative inline-flex h-3 w-3 rounded-full bg-red-500" />
+                    </span>
+                    {formatRecordingTime(durationMs)}
+                  </div>
+                )}
+
+                <Button
+                  type="button"
+                  size="icon"
+                  variant="secondary"
+                  onClick={() => setImmersivePreview(false)}
+                  className="absolute right-3 top-3 z-20 h-11 w-11 rounded-full border border-white/10 bg-black/60 text-white shadow-lg hover:bg-black/75"
+                >
+                  <Minimize2 className="h-4 w-4" />
+                </Button>
+              </div>
+            </div>
+
+            <div className="flex flex-col items-center justify-center gap-3">
+              {renderPrimaryActions("rail")}
+            </div>
+          </div>
+        </div>
+      )}
     </div>
   );
 }

tests/e2e/app.spec.ts

@@ -46,18 +46,21 @@ test("recorder flow archives a session and exposes it in videos", async ({ page
   await page.setViewportSize({ width: 390, height: 844 });
   await page.goto("/recorder");
   await expect(page.getByTestId("recorder-title")).toBeVisible();
+  await page.getByTestId("recorder-mobile-focus-button").click();
+  const focusShell = page.getByTestId("recorder-mobile-focus-shell");
+  await expect(focusShell).toBeVisible();
 
-  await page.getByTestId("recorder-start-camera-button").click();
-  await expect(page.getByTestId("recorder-start-recording-button")).toBeVisible();
+  await focusShell.getByTestId("recorder-start-camera-button").click();
+  await expect(focusShell.getByTestId("recorder-start-recording-button")).toBeVisible();
 
-  await page.getByTestId("recorder-start-recording-button").click();
-  await expect(page.getByTestId("recorder-marker-button")).toBeVisible();
+  await focusShell.getByTestId("recorder-start-recording-button").click();
+  await expect(focusShell.getByTestId("recorder-marker-button")).toBeVisible();
 
-  await page.getByTestId("recorder-marker-button").click();
+  await focusShell.getByTestId("recorder-marker-button").click();
   await expect(page.getByText("手动标记")).toBeVisible();
 
-  await page.getByTestId("recorder-finish-button").click();
-  await expect(page.getByTestId("recorder-reset-button")).toBeVisible({ timeout: 8_000 });
+  await focusShell.getByTestId("recorder-finish-button").click();
+  await expect(focusShell.getByTestId("recorder-reset-button")).toBeVisible({ timeout: 8_000 });
 
   await page.goto("/videos");
   await expect(page.getByTestId("video-card")).toHaveCount(1);