diff --git a/chfs-ng/internal/api/web/index.html b/chfs-ng/internal/api/web/index.html
index 59c9c7c..d46cace 100644
--- a/chfs-ng/internal/api/web/index.html
+++ b/chfs-ng/internal/api/web/index.html
@@ -21,7 +21,7 @@ body{background:var(--bg);color:var(--text);transition:background .2s,color .2s}
 button.ghost{background:var(--surface2);color:var(--text)}button.danger{background:var(--danger)}.meta,.path{color:var(--muted)}
 .card{box-shadow:var(--shadow)}th{background:var(--surface2);color:var(--muted)}th,td{border-color:var(--border)}.field input,.toolbar input,.field select{background:var(--surface);color:var(--text);border-color:var(--border)}
 .iconbtn{width:38px;height:38px;padding:0;background:var(--surface2);color:var(--text);display:inline-flex;align-items:center;justify-content:center}.ui-icon{width:18px;height:18px;display:block;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.ui-icon.fill{fill:currentColor;stroke:none}.viewbtn.active{background:var(--primary);color:#fff}.selectbox{width:18px;height:18px;accent-color:var(--primary)}
-.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px;padding:16px}.tile{position:relative;border:1px solid var(--border);border-radius:16px;padding:12px;background:var(--surface);min-height:192px;cursor:pointer;transition:border-color .16s,box-shadow .16s,transform .16s}.tile:hover{border-color:var(--primary);box-shadow:0 10px 28px rgba(20,30,50,.08);transform:translateY(-1px)}.tile.selected{border-color:var(--primary);box-shadow:0 0 0 2px rgba(37,99,235,.14)}.tile .thumb{height:112px;display:flex;align-items:center;justify-content:center;border-radius:11px;background:var(--surface2);overflow:hidden;margin-bottom:11px;color:var(--muted);transition:background .16s}.tile:hover .thumb{background:var(--surface2)}.tile .thumb .ui-icon{width:44px;height:44px;stroke-width:1.35}.tile .thumb img{width:100%;height:100%;object-fit:cover;display:block}.tile .tile-title{display:flex;align-items:center;gap:7px;min-width:0;padding:0 2px}.tile .tile-title .ui-icon{width:16px;height:16px;flex:0 0 auto}.tile .file-name{font-size:14px;font-weight:560;line-height:1.35}.tile .tile-meta{display:flex;gap:8px;padding:6px 2px 0;color:var(--muted);font-size:12px}.tile .tile-check{position:absolute;left:10px;top:10px;opacity:0;transition:opacity .14s}.tile:hover .tile-check,.tile.selected .tile-check{opacity:1}.tile .tile-action{position:absolute;right:9px;top:9px;width:30px;height:30px;padding:0;border:1px solid var(--border);background:var(--surface);color:var(--text);opacity:0;transition:opacity .14s}.tile:hover .tile-action,.tile.selected .tile-action{opacity:1}.tile .tile-action .ui-icon{width:15px;height:15px}.tile.folder-tile .thumb{background:var(--surface2)}.tile.media-tile .thumb{background:#0d1218;color:#d7e0ec}.tile.media-tile .thumb .ui-icon{stroke-width:1.45}.progress{height:8px;background:var(--surface2);border-radius:99px;overflow:hidden}.progress i{display:block;height:100%;width:0;background:var(--primary);transition:width .15s}.upload-row{display:grid;gap:7px;padding:10px 0;border-bottom:1px solid var(--border)}.upload-row .upload-head{display:flex;align-items:center;gap:8px;min-width:0}.upload-row .upload-name{min-width:0;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.upload-row .upload-actions{display:flex;gap:5px}.upload-row .upload-actions button{padding:5px 8px;font-size:12px}.upload-summary{display:flex;align-items:center;gap:10px;padding:10px 0}.upload-summary .count{margin-right:auto}.drop-active{border-color:var(--primary)!important;background:var(--surface2)!important}.qr{width:min(320px,80vw);aspect-ratio:1;margin:auto;display:block;border-radius:12px;background:#fff}.drop-hint{color:var(--muted);font-size:13px;margin-top:7px}.tile .tilecheck{position:absolute;top:9px;left:9px}.tile .tilemenu{position:absolute;right:7px;top:7px}.file-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.bulk{display:none;align-items:center;gap:8px;margin-bottom:12px}.bulk.show{display:flex}.bulk .count{font-weight:650;margin-right:auto}.layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:16px}.sidebar{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:12px;height:max-content;position:sticky;top:82px}.side-title{font-size:12px;font-weight:700;color:var(--muted);padding:6px 9px}.side-item{width:100%;text-align:left;background:transparent;color:var(--text);margin:2px 0}.side-item.active{background:var(--surface2);color:var(--primary)}@media(max-width:900px){.layout{display:block}.sidebar{position:static;margin-bottom:14px;display:flex;gap:6px;overflow:auto}.side-title{display:none}.side-item{white-space:nowrap;width:auto}}.toast-host{position:fixed;right:18px;bottom:18px;z-index:20;display:grid;gap:8px}.toast{min-width:240px;max-width:min(420px,calc(100vw - 36px));padding:11px 14px;border:1px solid var(--border);border-radius:11px;background:var(--surface);box-shadow:var(--shadow);color:var(--text);animation:toastIn .18s ease}@keyframes toastIn{from{transform:translateY(8px);opacity:0}to{transform:none;opacity:1}}.toast.error{border-color:var(--danger)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:58px 24px;min-height:260px;color:var(--muted)}.empty-state .empty-icon{width:58px;height:58px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:16px;background:var(--surface2);margin-bottom:14px;color:var(--muted)}.empty-state .empty-icon .ui-icon{width:27px;height:27px;stroke-width:1.45}.empty-state h3{margin:0 0 6px;color:var(--text);font-size:16px}.empty-state p{margin:0;max-width:420px;font-size:13px;line-height:1.6}.empty-state .row{margin-top:16px}.empty-state.search-empty{min-height:300px}.state-icon{width:58px;height:58px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:16px;background:var(--surface2);margin:0 auto 14px;color:var(--muted)}.state-icon .ui-icon{width:27px;height:27px;stroke-width:1.45}.state-actions{display:flex;gap:8px;justify-content:center;margin-top:16px}.loading-state{padding:24px}.skeleton-row{height:48px;border-bottom:1px solid var(--border);background:linear-gradient(90deg,var(--surface2),var(--surface),var(--surface2));background-size:240% 100%;animation:shimmer 1.2s infinite}@keyframes shimmer{from{background-position:200% 0}to{background-position:-40% 0}}.state-error{padding:46px 24px}.state-error h3{margin:0 0 7px;color:var(--text);font-size:16px}.state-error p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}.context{position:fixed;z-index:10;display:none;min-width:170px;background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:10px;padding:5px}.context button{display:block;width:100%;text-align:left;background:transparent;color:var(--text);border-radius:7px}.context button:hover{background:var(--surface2)}
+.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px;padding:16px}.tile{position:relative;border:1px solid var(--border);border-radius:16px;padding:12px;background:var(--surface);min-height:192px;cursor:pointer;transition:border-color .16s,box-shadow .16s,transform .16s;touch-action:manipulation}.tile .selectbox,.file-row .selectbox{touch-action:manipulation}.side-item{touch-action:manipulation}.tile:hover{border-color:var(--primary);box-shadow:0 10px 28px rgba(20,30,50,.08);transform:translateY(-1px)}.tile.selected{border-color:var(--primary);box-shadow:0 0 0 2px rgba(37,99,235,.14)}.tile .thumb{height:112px;display:flex;align-items:center;justify-content:center;border-radius:11px;background:var(--surface2);overflow:hidden;margin-bottom:11px;color:var(--muted);transition:background .16s}.tile:hover .thumb{background:var(--surface2)}.tile .thumb .ui-icon{width:44px;height:44px;stroke-width:1.35}.tile .thumb img{width:100%;height:100%;object-fit:cover;display:block}.tile .tile-title{display:flex;align-items:center;gap:7px;min-width:0;padding:0 2px}.tile .tile-title .ui-icon{width:16px;height:16px;flex:0 0 auto}.tile .file-name{font-size:14px;font-weight:560;line-height:1.35}.tile .tile-meta{display:flex;gap:8px;padding:6px 2px 0;color:var(--muted);font-size:12px}.tile .tile-check{position:absolute;left:10px;top:10px;opacity:0;transition:opacity .14s}.tile:hover .tile-check,.tile.selected .tile-check{opacity:1}.tile .tile-action{position:absolute;right:9px;top:9px;width:30px;height:30px;padding:0;border:1px solid var(--border);background:var(--surface);color:var(--text);opacity:0;transition:opacity .14s}.tile:hover .tile-action,.tile.selected .tile-action{opacity:1}.tile .tile-action .ui-icon{width:15px;height:15px}.tile.folder-tile .thumb{background:var(--surface2)}.tile.media-tile .thumb{background:#0d1218;color:#d7e0ec}.tile.media-tile .thumb .ui-icon{stroke-width:1.45}.progress{height:8px;background:var(--surface2);border-radius:99px;overflow:hidden}.progress i{display:block;height:100%;width:0;background:var(--primary);transition:width .15s}.upload-row{display:grid;gap:7px;padding:10px 0;border-bottom:1px solid var(--border)}.upload-row .upload-head{display:flex;align-items:center;gap:8px;min-width:0}.upload-row .upload-name{min-width:0;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.upload-row .upload-actions{display:flex;gap:5px}.upload-row .upload-actions button{padding:5px 8px;font-size:12px}.upload-summary{display:flex;align-items:center;gap:10px;padding:10px 0}.upload-summary .count{margin-right:auto}.drop-active{border-color:var(--primary)!important;background:var(--surface2)!important}.qr{width:min(320px,80vw);aspect-ratio:1;margin:auto;display:block;border-radius:12px;background:#fff}.drop-hint{color:var(--muted);font-size:13px;margin-top:7px}.tile .tilecheck{position:absolute;top:9px;left:9px}.tile .tilemenu{position:absolute;right:7px;top:7px}.file-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.bulk{display:none;align-items:center;gap:8px;margin-bottom:12px}.bulk.show{display:flex}.bulk .count{font-weight:650;margin-right:auto}.layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:16px}.sidebar{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:12px;height:max-content;position:sticky;top:82px}.side-title{font-size:12px;font-weight:700;color:var(--muted);padding:6px 9px}.side-item{width:100%;text-align:left;background:transparent;color:var(--text);margin:2px 0}.side-item.active{background:var(--surface2);color:var(--primary)}@media(max-width:900px){.layout{display:block}.sidebar{position:static;margin-bottom:14px;display:flex;gap:6px;overflow:auto}.side-title{display:none}.side-item{white-space:nowrap;width:auto}.sidebar{scrollbar-width:none}.sidebar::-webkit-scrollbar{display:none}}@media(max-width:700px){main{margin:12px auto;padding:0 10px}.top{height:56px}.brand{font-size:18px}.path{max-width:46vw}.dialog{padding:16px;border-radius:14px}.dialog.preview-dialog{width:100%;height:calc(100vh - 12px);max-height:calc(100vh - 12px);border-radius:14px}.preview-stage{padding:14px;max-height:calc(100vh - 118px)}.preview-stage img{max-height:64vh}.preview-stage video{max-height:64vh}.editor-wrap{height:calc(100vh - 190px)}.editor-input,.editor-lines{font-size:12px}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;padding:10px}.tile{min-height:164px;padding:9px;border-radius:13px}.tile .thumb{height:86px;margin-bottom:8px}.tile .tile-meta{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.tile .tile-meta span+span{display:none}.tile .tile-check,.tile .tile-action{opacity:1}.bulk{bottom:8px}.toast-host{right:10px;bottom:10px}.toast{min-width:0;width:calc(100vw - 20px)}.row{flex-wrap:wrap}.row button{min-height:40px}.context{min-width:190px}.context button{padding:11px 10px}}.toast-host{position:fixed;right:18px;bottom:18px;z-index:20;display:grid;gap:8px}.toast{min-width:240px;max-width:min(420px,calc(100vw - 36px));padding:11px 14px;border:1px solid var(--border);border-radius:11px;background:var(--surface);box-shadow:var(--shadow);color:var(--text);animation:toastIn .18s ease}@keyframes toastIn{from{transform:translateY(8px);opacity:0}to{transform:none;opacity:1}}.toast.error{border-color:var(--danger)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:58px 24px;min-height:260px;color:var(--muted)}.empty-state .empty-icon{width:58px;height:58px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:16px;background:var(--surface2);margin-bottom:14px;color:var(--muted)}.empty-state .empty-icon .ui-icon{width:27px;height:27px;stroke-width:1.45}.empty-state h3{margin:0 0 6px;color:var(--text);font-size:16px}.empty-state p{margin:0;max-width:420px;font-size:13px;line-height:1.6}.empty-state .row{margin-top:16px}.empty-state.search-empty{min-height:300px}.state-icon{width:58px;height:58px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:16px;background:var(--surface2);margin:0 auto 14px;color:var(--muted)}.state-icon .ui-icon{width:27px;height:27px;stroke-width:1.45}.state-actions{display:flex;gap:8px;justify-content:center;margin-top:16px}.loading-state{padding:24px}.skeleton-row{height:48px;border-bottom:1px solid var(--border);background:linear-gradient(90deg,var(--surface2),var(--surface),var(--surface2));background-size:240% 100%;animation:shimmer 1.2s infinite}@keyframes shimmer{from{background-position:200% 0}to{background-position:-40% 0}}.state-error{padding:46px 24px}.state-error h3{margin:0 0 7px;color:var(--text);font-size:16px}.state-error p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}.context{position:fixed;z-index:10;display:none;min-width:170px;background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:10px;padding:5px}.context button{display:block;width:100%;text-align:left;background:transparent;color:var(--text);border-radius:7px}.context button:hover{background:var(--surface2)}
 </style>
 </head>
 <body>
@@ -70,7 +70,7 @@ function renderList(items){const body=$("files");body.innerHTML=items.length?ite
 function renderGrid(items){$("grid").innerHTML=items.length?items.map(f=>{const p=current?current+"/"+f.name:f.name,canRead=(f.mask||"").includes("R"),type=fileType(f),selectedNow=selected.has(p),drag=' draggable="true"';let thumb=iconFor(f);if(type==="image"&&canRead)thumb='<img src="/chfs/preview?file='+encodeURIComponent(p)+'" loading="lazy" alt="">';const tileClass=(f.dir?'folder-tile ':'')+(['video','audio'].includes(type)?'media-tile':'');const meta=f.dir?'文件夹':fmt(f.size);return '<div class="tile '+tileClass+(selectedNow?' selected':'')+'"'+drag+' data-file-path="'+esc(p)+'" onclick="selectItem('+JSON.stringify(p)+',true,event)" ondblclick="activateItem('+JSON.stringify(p)+')" oncontextmenu="itemMenu(event,'+JSON.stringify(p)+');return false" ondragstart="fileDragStart(event,'+JSON.stringify(p)+')" ondragend="fileDragEnd(event)" ondragover="folderDragOver(event,'+JSON.stringify(p)+')" ondragleave="folderDragLeave(event)" ondrop="folderDrop(event,'+JSON.stringify(p)+')"><input class="selectbox tile-check" type="checkbox" '+(selectedNow?'checked':'')+' onclick="event.stopPropagation();selectItem('+JSON.stringify(p)+',this.checked,event)"><button class="iconbtn tile-action" onclick="event.stopPropagation();itemMenu(event,'+JSON.stringify(p)+')" title="更多操作"><svg class="ui-icon" viewBox="0 0 24 24"><circle cx="5" cy="12" r="1"/><circle cx="12" cy="12" r="1"/><circle cx="19" cy="12" r="1"/></svg></button><div class="thumb">'+thumb+'</div><div class="tile-title">'+iconFor(f)+'<div class="file-name">'+esc(f.name)+'</div></div><div class="tile-meta"><span>'+meta+'</span>'+(f.modified?'<span>'+esc(f.modified)+'</span>':'')+'</div></div>'}).join(''):emptyState("这个文件夹还是空的","上传文件或创建内容后，它们会显示在这里。","upload")}
 function fileDragStart(e,p){const paths=selected.has(p)?[...selected]:[p];e.dataTransfer.effectAllowed="move";e.dataTransfer.setData("text/chfs-paths",JSON.stringify(paths));e.currentTarget.classList.add("dragging")}
 function fileDragEnd(e){e.currentTarget.classList.remove("dragging");document.querySelectorAll('.drop-target').forEach(el=>el.classList.remove('drop-target'))}
-function folderDragOver(e,target){if(!e.dataTransfer?.types.includes('text/chfs-paths'))return;e.preventDefault();if(target===current||target===""||[...selected].some(p=>p===target||target.startsWith(p+'/')))return;e.dataTransfer.dropEffect="move";e.currentTarget.classList.add('drop-target')}
+function folderDragOver(e,target){if(!e.dataTransfer?.types.includes('text/chfs-paths'))return;const f=lastItems.find(x=>(current?current+'/':'')+x.name===target);if(!f?.dir||!(f.mask||'').includes('W'))return;e.preventDefault();if(target===current||target===""||[...selected].some(p=>p===target||target.startsWith(p+'/')))return;e.dataTransfer.dropEffect="move";e.currentTarget.classList.add('drop-target')}
 function folderDragLeave(e){e.currentTarget.classList.remove('drop-target')}
 async function folderDrop(e,target){if(!e.dataTransfer?.types.includes('text/chfs-paths'))return;e.preventDefault();e.stopPropagation();e.currentTarget.classList.remove('drop-target');let paths=[];try{paths=JSON.parse(e.dataTransfer.getData('text/chfs-paths')||'[]')}catch{};const f=lastItems.find(x=>(current?current+'/':'')+x.name===target);if(!f?.dir||!paths.length)return;if(paths.some(p=>p===target||target.startsWith(p+'/')))return fail('不能移动到自身或子目录');const base=target.replace(/^\/+|\/+$/g,'');await runOperation('移动 '+paths.length+' 项',async()=>{let done=0,failed=[],renamed=[];for(const source of paths){const name=source.split('/').pop(),destination=base?base+'/'+name:name;try{const actual=await transferWithConflict(source,destination,false);if(actual!==destination)renamed.push(name+' → '+actual.split('/').pop());done++}catch(err){failed.push(name+': '+err.message)}}selected.clear();await refresh();if(failed.length||renamed.length)show('<h2>移动完成</h2><div class="notice">'+esc('成功 '+done+' 项，失败 '+failed.length+' 项'+(renamed.length?'。\n\n自动重命名：\n'+renamed.join('\n'):'')+(failed.length?'。\n\n失败：\n'+failed.join('\n'):''))+'</div><div class="row"><button class="ghost" onclick="closeModal()">关闭</button></div>');else toast('已移动 '+done+' 项')})}
 function activateItem(p){const f=lastItems.find(x=>(current?current+"/":"")+x.name===p);if(!f)return;if(f.dir&&(f.mask||"").includes("R"))openDir(p);else if((f.mask||"").includes("R"))previewFile(p)}
@@ -99,11 +99,11 @@ async function bulkTransfer(copyOnly){if(!selected.size)return;const dstDir=awai
 async function bulkDelete(){if(!selected.size)return;const paths=[...selected];if(!await confirmBox("确认删除",paths.length===1?"确定删除 "+paths[0]+"？":"确定删除这 "+paths.length+" 项？删除文件夹时会同时删除其中内容。"))return;await runOperation("删除中",async()=>{try{const body=new URLSearchParams();paths.forEach(p=>body.append("filepath",p));await api("/chfs/rmfiles",{method:"POST",headers:{"Content-Type":"application/x-www-form-urlencoded"},body});selected.clear();await refresh();toast(paths.length===1?"已删除":"已删除 "+paths.length+" 项")}catch(e){fail("删除失败："+e.message)}})}
 
 
-async function loadSideRoots(){try{const d=await api("/chfs/roots"),roots=d.roots||[];$("sideRoots").innerHTML=roots.map(r=>'<button class="side-item '+(r.path===current?'active':'')+'" data-root-path="'+esc(r.path)+'" onclick="jumpRoot('+JSON.stringify(r.path)+')" ondragover="sideDragOver(event,'+JSON.stringify(r.path)+')" ondragleave="sideDragLeave(event)" ondrop="sideDrop(event,'+JSON.stringify(r.path)+')">'+svgIcon('folder')+' '+esc(r.name)+'</button>').join('')||'<div class="meta" style="padding:8px">没有可进入的位置</div>'}catch{}}
+async function loadSideRoots(){try{const d=await api("/chfs/roots"),roots=d.roots||[];$("sideRoots").innerHTML=roots.map(r=>{const writable=String(r.mask||"").includes("W");return '<button class="side-item '+(r.path===current?'active':'')+'" data-root-path="'+esc(r.path)+'" onclick="jumpRoot('+JSON.stringify(r.path)+')" ondragover="sideDragOver(event,'+JSON.stringify(r.path)+','+writable+')" ondragleave="sideDragLeave(event)" ondrop="sideDrop(event,'+JSON.stringify(r.path)+','+writable+')">'+svgIcon('folder')+' '+esc(r.name)+'</button>'}).join('')||'<div class="meta" style="padding:8px">没有可进入的位置</div>'}catch{}}
 async function showRoots(){try{const d=await api("/chfs/roots");const roots=d.roots||[];let html='<h2>选择位置</h2><div>';for(const r of roots)html+='<button class="ghost" style="display:block;width:100%;text-align:left;margin:8px 0" onclick="jumpRoot('+JSON.stringify(r.path)+')"><b>'+esc(r.name)+'</b><span class="meta"> · '+esc(r.path||"/")+' · '+esc(r.mask)+'</span></button>';if(!roots.length)html+='<div class="empty">没有可进入的共享位置</div>';html+='</div><div class="row"><button class="ghost" onclick="closeModal()">关闭</button></div>';show(html)}catch(e){fail(e.message)}}
-function sideDragOver(e,target){if(!e.dataTransfer?.types.includes('text/chfs-paths'))return;e.preventDefault();e.dataTransfer.dropEffect='move';e.currentTarget.classList.add('drop-target')}
+function sideDragOver(e,target,writable){if(!e.dataTransfer?.types.includes('text/chfs-paths')||!writable)return;e.preventDefault();e.dataTransfer.dropEffect='move';e.currentTarget.classList.add('drop-target')}
 function sideDragLeave(e){e.currentTarget.classList.remove('drop-target')}
-async function sideDrop(e,target){if(!e.dataTransfer?.types.includes('text/chfs-paths'))return;e.preventDefault();e.stopPropagation();e.currentTarget.classList.remove('drop-target');let paths=[];try{paths=JSON.parse(e.dataTransfer.getData('text/chfs-paths')||'[]')}catch{};if(!paths.length)return;await runOperation('正在移动 '+paths.length+' 项',async()=>{const failed=[],renamed=[];let done=0;for(const source of paths){const name=source.split('/').pop(),destination=target?target+'/'+name:name;try{const actual=await transferWithConflict(source,destination,false);done++;if(actual!==destination)renamed.push(name+' → '+actual.split('/').pop())}catch(err){failed.push(name+': '+err.message)}}selected.clear();await refresh();if(failed.length||renamed.length)show('<h2>移动完成</h2><div class="notice">'+esc('成功 '+done+' 项，失败 '+failed.length+' 项'+(renamed.length?'。\n\n自动重命名：\n'+renamed.join('\n'):'')+(failed.length?'。\n\n失败：\n'+failed.join('\n'):''))+'</div><div class="row"><button class="ghost" onclick="closeModal()">关闭</button></div>');else toast('已移动 '+done+' 项')})}
+async function sideDrop(e,target,writable){if(!e.dataTransfer?.types.includes('text/chfs-paths')||!writable)return;e.preventDefault();e.stopPropagation();e.currentTarget.classList.remove('drop-target');let paths=[];try{paths=JSON.parse(e.dataTransfer.getData('text/chfs-paths')||'[]')}catch{};if(!paths.length)return;await runOperation('正在移动 '+paths.length+' 项',async()=>{const failed=[],renamed=[];let done=0;for(const source of paths){const name=source.split('/').pop(),destination=target?target+'/'+name:name;try{const actual=await transferWithConflict(source,destination,false);done++;if(actual!==destination)renamed.push(name+' → '+actual.split('/').pop())}catch(err){failed.push(name+': '+err.message)}}selected.clear();await refresh();if(failed.length||renamed.length)show('<h2>移动完成</h2><div class="notice">'+esc('成功 '+done+' 项，失败 '+failed.length+' 项'+(renamed.length?'。\n\n自动重命名：\n'+renamed.join('\n'):'')+(failed.length?'。\n\n失败：\n'+failed.join('\n'):''))+'</div><div class="row"><button class="ghost" onclick="closeModal()">关闭</button></div>');else toast('已移动 '+done+' 项')})}
 
 function jumpRoot(p){current=p;navigationRoot=p;closeModal();refresh()}
 function renderBreadcrumb(){const el=$("crumb"),parts=current?current.split("/").filter(Boolean):[];const rootName=navigationRoot?(navigationRoot===me?.home?'我的空间':'当前位置'): '全部文件';let html='<button class="crumb-seg '+(!current||current===navigationRoot?'current':'')+'" onclick="navigateTo('+JSON.stringify(navigationRoot||'')+')">'+esc(rootName)+'</button>';let acc='';for(let i=0;i<parts.length;i++){acc=acc?acc+'/'+parts[i]:parts[i];html+='<span class="crumb-sep">/</span><button class="crumb-seg '+(i===parts.length-1?'current':'')+'" onclick="navigateTo('+JSON.stringify(acc)+')">'+esc(parts[i])+'</button>'}el.innerHTML=html}
@@ -171,7 +171,7 @@ function toast(message,error=false){const host=$("toastHost"),el=document.create
 function fail(message){toast(message,true)}
 function keyboardNavigation(e){const tag=(e.target?.tagName||"").toLowerCase();if(tag==="input"||tag==="textarea"||tag==="select"||tag==="button"||tag==="a"||e.target?.isContentEditable)return;if(e.key==="Escape"){if($("modal").classList.contains("show"))closeModal();else closeContext();return}if((e.ctrlKey||e.metaKey)&&e.key.toLowerCase()==="a"){e.preventDefault();toggleAll(true);return}if(e.key==="Enter"){e.preventDefault();openSelected();return}if(e.key==="Delete"&&selected.size){e.preventDefault();bulkDelete();return}if(e.key==="Backspace"&&current&&!searchMode){e.preventDefault();goUp();return}if((e.key==="ArrowDown"||e.key==="ArrowUp")){const source=searchMode?searchItems:lastItems;if(!source.length)return;e.preventDefault();const paths=searchMode?source.map(searchPath):selectablePaths(),anchor=selectionAnchor&&paths.includes(selectionAnchor)?selectionAnchor:[...selected][0],idx=Math.max(0,paths.indexOf(anchor)),next=Math.max(0,Math.min(paths.length-1,idx+(e.key==="ArrowDown"?1:-1)));if(searchMode)selectSearchItem(paths[next],true,e);else selectItem(paths[next],true,e);return}if(e.key==="Home"||e.key==="End"){const source=searchMode?searchItems:lastItems;if(!source.length)return;e.preventDefault();const paths=searchMode?source.map(searchPath):selectablePaths(),p=e.key==="Home"?paths[0]:paths.at(-1);if(searchMode)selectSearchItem(p,true,e);else selectItem(p,true,e)}}
 addEventListener("keydown",keyboardNavigation)
-function show(html,preview=false){$("dialog").innerHTML=html;$("dialog").classList.toggle("preview-dialog",preview);$("modal").classList.add("show")}function closeModal(){$("modal").classList.remove("show");$("dialog").classList.remove("preview-dialog")}
+function show(html,preview=false){$("dialog").innerHTML=html;$("dialog").classList.toggle("preview-dialog",preview);$("modal").classList.add("show")}async function closeModal(){if(window._editorDirty&&$("editText")){const ok=await confirmBox("放弃未保存修改？","当前文本还有未保存的修改，关闭后这些修改将丢失。");if(!ok)return false}window._editorDirty=false;$("modal").classList.remove("show");$("dialog").classList.remove("preview-dialog");return true}
 function ask(title,label,value="",type="text"){return new Promise(resolve=>{show('<h2>'+esc(title)+'</h2><div class="field"><label>'+esc(label)+'</label><input id="askInput" type="'+type+'" value="'+esc(value)+'"></div><div class="row"><button class="ghost" onclick="closeModal();window._askResolve(null)">取消</button><button onclick="window._askResolve($("askInput").value)">确定</button></div>');window._askResolve=v=>{closeModal();resolve(v)}})}
 function confirmBox(title,message){return new Promise(resolve=>{show('<h2>'+esc(title)+'</h2><div class="notice">'+esc(message)+'</div><div class="row"><button class="ghost" onclick="closeModal();window._confirmResolve(false)">取消</button><button class="danger" onclick="closeModal();window._confirmResolve(true)">确定</button></div>');window._confirmResolve=v=>resolve(v)})}
 $("modal").addEventListener("click",e=>{if(e.target.id==="modal")closeModal()})