diff --git a/Dockerfile b/Dockerfile
index 8ed8ce5..d4ac800 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -165,7 +165,7 @@ RUN php -r "file_exists('.env') || copy('.env.example', '.env');" \
 RUN printf '%s\n' \
         'c0e513ec8e93fd81b34b3c6de5cf5eb8  ./public/js/context-js/context-js.js' \
         'c0e513ec8e93fd81b34b3c6de5cf5eb8  ./resources/js/context-js.js' \
-        'b40ba5e968e70e7f6d5c9e00c03e25e1  ./resources/views/user/images.blade.php' \
+        'e0b5b669408e8a5f3dee7f332ad21e97  ./resources/views/user/images.blade.php' \
     | md5sum -c - \
     && grep -q "assetVersion('js/context-js/context-js.js')" ./resources/views/user/images.blade.php \
     && grep -q 'isIOSWebKit' ./public/js/context-js/context-js.js \
@@ -208,7 +208,7 @@ RUN APP_SRC_MD5=$(find app config routes -type f -print0 2>/dev/null | sort -z |
         "fork_sha=${FORK_SHA}" \
         "lsky_commit=${LSKY_COMMIT}" \
         "context_js_md5=c0e513ec8e93fd81b34b3c6de5cf5eb8" \
-        "images_blade_md5=b40ba5e968e70e7f6d5c9e00c03e25e1" \
+        "images_blade_md5=e0b5b669408e8a5f3dee7f332ad21e97" \
         "app_src_md5=${APP_SRC_MD5}" \
         "app_js_md5=${APP_JS_MD5}" \
         "app_css_md5=${APP_CSS_MD5}" \
diff --git a/patches/ios-longpress.patch b/patches/ios-longpress.patch
index ec0f818..f2cb98b 100644
--- a/patches/ios-longpress.patch
+++ b/patches/ios-longpress.patch
@@ -52,7 +52,7 @@
 # 三个文件各自的 md5（与 Dockerfile「自证 2」里的期望值一致）：
 #   c0e513ec8e93fd81b34b3c6de5cf5eb8  src/resources/js/context-js.js
 #   c0e513ec8e93fd81b34b3c6de5cf5eb8  src/public/js/context-js/context-js.js
-#   b40ba5e968e70e7f6d5c9e00c03e25e1  src/resources/views/user/images.blade.php
+#   e0b5b669408e8a5f3dee7f332ad21e97  src/resources/views/user/images.blade.php
 #
 # 上游原文件 md5（改动前，供比对）：
 #   c8e57f6232848ca8277341ddf1a3a7a6  resources/js/context-js.js
diff --git a/src/resources/views/user/images.blade.php b/src/resources/views/user/images.blade.php
index 6b70233..afeddba 100644
--- a/src/resources/views/user/images.blade.php
+++ b/src/resources/views/user/images.blade.php
@@ -535,6 +535,42 @@ class="relative inline-flex h-4 w-7 shrink-0 items-center rounded-full bg-brand
             };
             const viewer = new Viewer(document.getElementById('images-grid'), {url: 'data-original'});
 
+            /* 修 Viewer.js 的「闩锁」bug（真机打点 + 源码逐行核对 + jsdom 复现确认）：
+             *   others.js:216-223  change() 里
+             *       case ACTION_SWITCH: {
+             *         this.action = 'switched';                       // ← 第一次 pointermove 就先上闩
+             *         if (|offsetX| > 1 && |offsetX| > |offsetY|) { … this.view(index) }
+             *   上闩之后 action 成了字符串 'switched'，而外层 switch 没有这个分支 ⇒ 之后
+             *   每一次 pointermove 全部落空：不切图、不平移、不放大 =「纹丝不动」。
+             *   判据又只看开头那次采样，真手指刚落下天然带纵向抖动（dy ≥ dx）⇒ 大多数手势
+             *   一开始就被闩死，偶尔开头偏横向才成功 —— 这就是「大多数失败、少数成功、无规律」。
+             * 从外面把闩松开：手势期间发现 action 变成那个闩值，就恢复成刚才那个动作值，
+             * 后续采样继续参与判定（切图判据看的是"最近一次位移"，所以横滑一定能切到）。
+             * 不改 viewer.min.js（压缩产物，改了没法维护）。 */
+            (function () {
+                let inViewer = false;
+                let lastAction = null;
+                let switchAction = null;
+                const isViewer = (el) => el instanceof Element && !!el.closest('.viewer-container');
+                document.addEventListener('pointerdown', (e) => {
+                    inViewer = isViewer(e.target);
+                    lastAction = null;
+                }, true);
+                document.addEventListener('pointermove', (e) => {
+                    if (!inViewer) return;
+                    const a = viewer.action;
+                    if (a === 'switched') {
+                        // 学到切图动作的真值后，把闩松开
+                        if (!switchAction && lastAction) switchAction = lastAction;
+                        if (switchAction && viewer.action !== switchAction) viewer.action = switchAction;
+                    } else if (a) {
+                        lastAction = a;      // 手势开始时 Viewer 刚算出来的动作值
+                    }
+                }, true);
+                document.addEventListener('pointerup', () => { inViewer = false; }, true);
+                document.addEventListener('pointercancel', () => { inViewer = false; }, true);
+            })();
+
             /* 安卓 Chromium：看图控件自己有"模拟双击"逻辑（viewerjs handlers.js:424-451）——
              * 两次落在**图片上**的抬手间隔 <500ms，它就 setTimeout 后自己派发一个 dblclick，
              * 于是放大。真机打点证实：老师连续滑图时凭空出现 dblclick×23 ⇒ 一放大，图片就不再
diff --git a/test/repro-swipe-latch.cjs b/test/repro-swipe-latch.cjs
new file mode 100644
index 0000000..1320bb6
--- /dev/null
+++ b/test/repro-swipe-latch.cjs
@@ -0,0 +1,43 @@
+const {JSDOM}=require('jsdom');
+const fs=require('fs');
+function run(file, moves, label){
+  const dom=new JSDOM('<!doctype html><body><ul id=g><li><img src="a.jpg" data-original="a.jpg"></li><li><img src="b.jpg" data-original="b.jpg"></li><li><img src="c.jpg" data-original="c.jpg"></li></ul></body>',{runScripts:'outside-only',pretendToBeVisual:true});
+  const w=dom.window;
+  w.ontouchstart=null;
+  if(!w.PointerEvent){ w.PointerEvent=class extends w.MouseEvent{constructor(t,i={}){super(t,i);this.pointerId=i.pointerId||1;this.pointerType=i.pointerType||'touch';}}; }
+  w.eval(fs.readFileSync(file,'utf8'));
+  const v=new w.Viewer(w.document.getElementById('g'),{transition:false});
+  v.show();
+  // fake a loaded, fitted image
+  v.viewed=true; v.viewing=false; v.showing=false;
+  v.imageData={x:0,y:0,width:300,height:200}; v.viewerData={width:360,height:640};
+  const idx0=v.index;
+  const ev=(t,x,y)=>new w.PointerEvent(t,{bubbles:true,cancelable:true,pointerId:7,pointerType:'touch',clientX:x,clientY:y,view:w});
+  const mk=(t,x,y)=>{const e=ev(t,x,y);Object.defineProperty(e,'pageX',{value:x});Object.defineProperty(e,'pageY',{value:y});return e;};
+  const canvas=v.canvas;
+  // ==== 阿罗娜的"松闩"补丁（从外面松开 Viewer 的 'switched' 闩锁）====
+  let inV=false,lastA=null,swA=null;
+  w.document.addEventListener('pointerdown',(e)=>{ inV=!!e.target.closest('.viewer-container'); lastA=null; },true);
+  w.document.addEventListener('pointermove',()=>{
+    if(!inV) return;
+    const a=v.action;
+    if(a==='switched'){ if(!swA&&lastA) swA=lastA; if(swA&&v.action!==swA) v.action=swA; }
+    else if(a){ lastA=a; }
+  },true);
+  w.document.addEventListener('pointerup',()=>{ inV=false; },true);
+  // ==== 补丁结束 ====
+  canvas.dispatchEvent(mk('pointerdown',300,400));
+  for(const [x,y] of moves) w.document.dispatchEvent(mk('pointermove',x,y));
+  w.document.dispatchEvent(mk('pointerup',moves[moves.length-1][0],moves[moves.length-1][1]));
+  console.log(label.padEnd(58),'index',idx0,'->',v.index, v.index!==idx0?'SWITCHED':'no switch');
+}
+const f=process.argv[2];
+run(f,[[250,402],[200,405],[150,410]],'first move big & horizontal');
+run(f,[[300,401],[250,402],[200,405],[150,410]],'first move dx=0,dy=1 (tiny, vertical noise)');
+run(f,[[299,402],[250,402],[200,405],[150,410]],'first move dx=-1,dy=2');
+run(f,[[298,403],[250,402],[200,405],[150,410]],'first move dx=-2,dy=3 (dy>dx)');
+run(f,[[296,401],[250,402],[200,405],[150,410]],'first move dx=-4,dy=1 (ok)');
+run(f,[[300,401],[300,402],[299,402],[250,402],[150,410]],'jitter 3 samples then swipe');
+run(f,[[300,420],[300,450],[301,500]],'vertical drag (should NOT switch)');
+run(f,[[299,405],[298,412],[250,415],[150,418]],'starts diagonal dy>dx, then horizontal');
+run(f,[[330,401],[360,403],[400,405]],'swipe right (should go prev -> stays 0 at index 0 / no loop)');