diff --git a/chfs-ng/internal/api/web/index.html b/chfs-ng/internal/api/web/index.html
index 8b32c75..2977852 100644
--- a/chfs-ng/internal/api/web/index.html
+++ b/chfs-ng/internal/api/web/index.html
@@ -14,6 +14,14 @@ table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:13px 15p
 .modal{position:fixed;inset:0;background:rgba(15,23,42,.4);display:none;align-items:center;justify-content:center;padding:18px;z-index:4}.modal.show{display:flex}.dialog{width:min(480px,100%);background:#fff;border-radius:15px;padding:22px}.dialog h2{margin-top:0}.field{display:grid;gap:7px;margin:13px 0}.field input{padding:10px 11px;border:1px solid #d7ddea;border-radius:9px}.row{display:flex;gap:9px;justify-content:flex-end;margin-top:18px}
 .login{max-width:390px;margin:10vh auto}.notice{padding:12px 14px;background:#eff6ff;border-radius:10px;color:#315b9b;margin-bottom:14px}
 @media(max-width:700px){th:nth-child(2),td:nth-child(2),th:nth-child(3),td:nth-child(3){display:none}.top{padding:0 13px}.path{max-width:40vw}.actions button{padding:7px 9px}.toolbar input{min-width:160px}}
+
+:root{--bg:#f5f7fb;--surface:#fff;--surface2:#f8fafc;--text:#172033;--muted:#7b8798;--border:#e5e9f2;--primary:#2563eb;--danger:#dc2626;--shadow:0 8px 30px rgba(20,30,50,.08)}
+html.dark{--bg:#0f141c;--surface:#171e28;--surface2:#202936;--text:#e7edf7;--muted:#9aa7b8;--border:#2c3746;--primary:#60a5fa;--danger:#f87171;--shadow:0 12px 35px rgba(0,0,0,.3)}
+body{background:var(--bg);color:var(--text);transition:background .2s,color .2s}.top,.card,.dialog{background:var(--surface);border-color:var(--border)}
+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)}.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(170px,1fr));gap:12px;padding:14px}.tile{position:relative;border:1px solid var(--border);border-radius:12px;padding:14px;background:var(--surface);min-height:145px;cursor:pointer}.tile:hover{border-color:var(--primary)}.tile.selected{outline:2px solid var(--primary)}.tile .thumb{height:82px;display:flex;align-items:center;justify-content:center;font-size:42px;border-radius:9px;background:var(--surface2);overflow:hidden;margin-bottom:9px}.tile .thumb img{width:100%;height:100%;object-fit:cover}.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}.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>
@@ -29,10 +37,10 @@ table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:13px 15p
     <button id="newFolderBtn" onclick="newFolder()">新建文件夹</button><button id="newTextBtn" onclick="newText()">新建文本</button>
     <label><button id="uploadBtn">上传</button><input id="upload" type="file" multiple hidden></label>
     <input id="search" placeholder="搜索文件名，回车执行">
-    <button id="usersBtn" onclick="showUsers()" hidden>用户管理</button><button class="ghost" id="pwdBtn" onclick="changePassword()" hidden>修改密码</button>
+    <button id="usersBtn" onclick="showUsers()" hidden>用户管理</button><button class="ghost" id="pwdBtn" onclick="changePassword()" hidden>修改密码</button><button class="iconbtn" id="themeBtn" onclick="toggleTheme()" title="主题">◐</button><button class="iconbtn viewbtn active" id="listBtn" onclick="setView("list")" title="列表">☷</button><button class="iconbtn viewbtn" id="gridBtn" onclick="setView("grid")" title="网格">▦</button>
   </div>
-  <div class="card"><table><thead><tr><th>名称</th><th>大小</th><th>修改时间</th><th></th></tr></thead><tbody id="files"></tbody></table></div>
-</main>
+  <div id="bulk" class="bulk"><span id="selectedCount" class="count"></span><button class="danger" onclick="bulkDelete()">删除</button><button class="ghost" onclick="clearSelection()">取消选择</button></div><div class="card" id="fileCard"><table><thead><tr><th><input class="selectbox" type="checkbox" onchange="toggleAll(this.checked)"></th><th>名称</th><th>大小</th><th>修改时间</th><th></th></tr></thead><tbody id="files"></tbody></table><div id="grid" class="grid" hidden></div></div>
+</main><div id="context" class="context"></div>
 <div class="modal" id="modal"><div class="dialog" id="dialog"></div></div>
 <script>
 const $=id=>document.getElementById(id);let current="",me=null,currentMask="";
@@ -42,7 +50,23 @@ function fmt(n){if(n<1024)return n+" B";if(n<1048576)return (n/1024).toFixed(1)+
 async function init(){try{me=await api("/chfs/me")}catch{me={username:"",home:"",admin:false}};updateUser();current=me.home||"";await refresh()}
 function updateUser(){$("who").textContent=me.username?me.username: "访客";$("loginBtn").hidden=!!me.username;$("logoutBtn").hidden=!me.username;$("usersBtn").hidden=!me.admin;$("pwdBtn").hidden=!me.username||!me.managed}
 async function refresh(){try{const q=encodeURIComponent(current);const data=await api("/chfs/files?filepath="+q);currentMask=data.currentMask||"";const writable=currentMask.includes("W");$("newFolderBtn").disabled=!writable;$("newTextBtn").disabled=!writable;$("uploadBtn").disabled=!writable;$("search").disabled=!data.currentMask?.includes("R");render(data.files||[]);$("crumb").textContent="/"+current;$("notice").innerHTML=""}catch(e){$("notice").innerHTML='<div class="notice">'+esc(e.message)+"</div>"}}
-function render(items){const body=$("files");body.innerHTML="";if(!items.length){body.innerHTML='<tr><td colspan="4" class="empty">这里还没有文件</td></tr>';return}for(const f of items){const p=current?current+"/"+f.name:f.name;const row=document.createElement("tr");const icon=f.dir?"📁":"📄";const share=f.guestMask&&f.guestMask.includes("R")?'<button class="ghost" onclick="shareItem('+JSON.stringify(p)+')">分享</button>':"";const canRead=(f.mask||"").includes("R"),canWrite=(f.mask||"").includes("W"),canDelete=(f.mask||"").includes("D");const actions=(canRead?(f.dir?'<button class="ghost" onclick="downloadDir('+JSON.stringify(p)+')">ZIP</button>':'<button class="ghost" onclick="downloadFile('+JSON.stringify(p)+')">下载</button>'):"")+(canRead?share:"")+(canWrite?'<button class="ghost" onclick="renameItem('+JSON.stringify(p)+')">改名</button>':"")+(canDelete?'<button class="danger" onclick="removeItem('+JSON.stringify(p)+')">删除</button>':"");row.innerHTML='<td><div class="name"><span>'+icon+'</span>'+ (f.dir&&canRead?'<a href="#" onclick="openDir('+JSON.stringify(p)+');return false">'+esc(f.name)+'</a>':'<span>'+esc(f.name)+'</span>')+'</div></td><td class="meta">'+(f.dir?"—":fmt(f.size))+'</td><td class="meta">'+esc(f.modified||"")+'</td><td><div class="actions">'+actions+'</div></td>';body.appendChild(row)}}
+function fileType(f){const n=f.name.toLowerCase();if(f.dir)return "folder";if(/\.(png|jpe?g|gif|webp|bmp|svg)$/.test(n))return "image";if(/\.(mp4|webm|mov|mkv)$/.test(n))return "video";if(/\.(mp3|wav|flac|m4a|ogg)$/.test(n))return "audio";if(/\.(pdf)$/.test(n))return "pdf";return "file"}
+function iconFor(f){return {folder:"📁",image:"🖼️",video:"🎬",audio:"🎵",pdf:"📕",file:"📄"}[fileType(f)]}
+function selectItem(p,checked){if(checked)selected.add(p);else selected.delete(p);updateSelection()}
+let selected=new Set(),lastItems=[];
+function render(items){lastItems=items;selected=new Set([...selected].filter(p=>items.some(f=>(current?current+"/":"")+f.name===p)));renderList(items);renderGrid(items);updateSelection()}
+function renderList(items){const body=$("files");body.innerHTML=items.map(f=>{const p=current?current+"/"+f.name:f.name,canRead=(f.mask||"").includes("R"),canWrite=(f.mask||"").includes("W"),canDelete=(f.mask||"").includes("D"),share=f.guestMask&&f.guestMask.includes("R")?'<button class="ghost" onclick="shareItem('+JSON.stringify(p)+')">分享</button>':"";return '<tr><td><input class="selectbox" type="checkbox" '+(selected.has(p)?"checked":"")+' onchange="selectItem('+JSON.stringify(p)+',this.checked)"></td><td><div class="name"><span>'+iconFor(f)+'</span>'+(f.dir&&canRead?'<a href="#" onclick="openDir('+JSON.stringify(p)+');return false">'+esc(f.name)+'</a>':'<span>'+esc(f.name)+'</span>')+'</div></td><td class="meta">'+(f.dir?"—":fmt(f.size))+'</td><td class="meta">'+esc(f.modified||"")+'</td><td><div class="actions"><button class="iconbtn" onclick="itemMenu(event,'+JSON.stringify(p)+')">⋮</button></div></td></tr>'}).join("")||'<tr><td colspan="5" class="empty">这里还没有文件</td></tr>'}
+function renderGrid(items){$("grid").innerHTML=items.map(f=>{const p=current?current+"/"+f.name:f.name,canRead=(f.mask||"").includes("R");let thumb=iconFor(f);if(fileType(f)==="image"&&canRead)thumb='<img src="/chfs/shared/'+encodeURI(p)+'" loading="lazy" alt="">';return '<div class="tile '+(selected.has(p)?"selected":"")+'" onclick="'+(f.dir&&canRead?'openDir('+JSON.stringify(p)+')':'toggleTile('+JSON.stringify(p)+')')+'" oncontextmenu="itemMenu(event,'+JSON.stringify(p)+');return false"><input class="selectbox tilecheck" type="checkbox" '+(selected.has(p)?"checked":"")+' onclick="event.stopPropagation();selectItem('+JSON.stringify(p)+',this.checked)"><div class="thumb">'+thumb+'</div><div class="file-name">'+esc(f.name)+'</div><div class="meta">'+(f.dir?'文件夹':fmt(f.size))+'</div></div>'}).join('')||'<div class="empty">这里还没有文件</div>'}
+function toggleTile(p){selectItem(p,!selected.has(p))}
+function toggleAll(v){lastItems.forEach(f=>{const p=current?current+"/"+f.name:f.name;if(v)selected.add(p);else selected.delete(p)});render(lastItems)}
+function clearSelection(){selected.clear();updateSelection();renderGrid(lastItems);renderList(lastItems)}
+function updateSelection(){const n=selected.size;$("bulk").classList.toggle("show",n>0);$("selectedCount").textContent=n?`已选择 ${n} 项`:"";$("grid").querySelectorAll('.tile').forEach((el,i)=>{const f=lastItems[i];if(f)el.classList.toggle('selected',selected.has(current?current+'/'+f.name:f.name))})}
+function setView(v){localStorage.setItem('chfs-view',v);$("files").parentElement.hidden=v==='grid';$("grid").hidden=v!=='grid';document.querySelectorAll('.viewbtn').forEach(b=>b.classList.remove('active'));$(v+'Btn').classList.add('active')}
+function itemMenu(e,p){e.preventDefault();const f=lastItems.find(x=>(current?current+'/':'')+x.name===p);const canRead=(f?.mask||'').includes('R'),canWrite=(f?.mask||'').includes('W'),canDelete=(f?.mask||'').includes('D');let html='';if(canRead)html+='<button onclick="downloadFile('+JSON.stringify(p)+');closeContext()">下载</button>';if(f?.dir&&canRead)html+='<button onclick="downloadDir('+JSON.stringify(p)+');closeContext()">下载 ZIP</button>';if(canWrite)html+='<button onclick="renameItem('+JSON.stringify(p)+');closeContext()">重命名</button>';if(canDelete)html+='<button onclick="removeItem('+JSON.stringify(p)+');closeContext()">删除</button>';if(f?.guestMask?.includes('R'))html+='<button onclick="shareItem('+JSON.stringify(p)+');closeContext()">分享</button>';if(!html)html='<div class="meta" style="padding:8px">没有可用操作</div>';$("context").innerHTML=html;$("context").style.left=Math.min(e.clientX,innerWidth-190)+'px';$("context").style.top=Math.min(e.clientY,innerHeight-220)+'px';$("context").style.display='block'}
+function closeContext(){$("context").style.display='none'}
+addEventListener('click',e=>{if(!e.target.closest('#context')&&!e.target.closest('.tilemenu'))closeContext()});
+function bulkDownload(){if(!selected.size)return;const first=[...selected][0];if(selected.size===1){downloadFile(first);return}location.href='/chfs/downloaddir/'+encodeURI(first.split('/').slice(0,-1).join('/'))}
+async function bulkDelete(){if(!selected.size)return;if(!confirm('确定删除已选择的 '+selected.size+' 项？'))return;for(const p of [...selected]){try{await api('/chfs/rmfiles',{method:'POST',headers:{'Content-Type':'application/x-www-form-urlencoded'},body:new URLSearchParams({filepath:p})})}catch(e){alert(p+': '+e.message)}}selected.clear();refresh()}
 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){alert(e.message)}}
 function jumpRoot(p){current=p;closeModal();refresh()}
 function openDir(p){current=p;refresh()}function goUp(){if(!current)return;const root=me.home||"";if(current===root)return;let p=current.split("/");p.pop();let n=p.join("/");if(root&&!(n===root||n.startsWith(root+"/")))n=root;current=n;refresh()}
@@ -74,6 +98,8 @@ function removeRule(i){if(i<0||isHomeRule(window._editRules[i]))return;window._e
 function renderEditRules(){const shared=window._editRules.filter(r=>!isHomeRule(r));$("sharedRules").innerHTML=shared.length?shared.map(r=>{const i=window._editRules.indexOf(r);const flags=(r.deny?"禁止":"允许")+" · "+(r.mask||"无权限")+(r.childrenOnly?" · 仅子项":"");return '<div class="row" style="justify-content:space-between;border-top:1px solid #edf0f5;padding:9px 0;margin:0"><span><b>'+esc(r.dir)+'</b><br><span class="meta">'+esc(flags)+'</span></span><button class="danger" onclick="removeRule('+i+')">移除</button></div>'}).join(""):'<div class="empty" style="padding:18px">还没有共享目录权限</div>';$("rules").innerHTML=window._editRules.map((r,i)=>isHomeRule(r)?'':'<div class="row" style="justify-content:space-between;border-top:1px solid #edf0f5;padding:8px 0"><span><b>'+esc(r.dir)+'</b> · '+esc((r.deny?"拒绝":"允许")+" · "+(r.mask||"禁止")+(r.childrenOnly?" · 仅子项":""))+'</span><button class="danger" onclick="removeRule('+i+')">移除</button></div>').join("")}
 async function saveUser(u){try{await api("/chfs/users",{method:"PUT",headers:{"Content-Type":"application/json"},body:JSON.stringify({username:u,enabled:$("ue").checked,rules:window._editRules})});showUsers()}catch(e){alert(e.message)}}
 async function deleteUser(u){if(!confirm("删除用户 "+u+"？用户目录不会自动删除。"))return;try{await api("/chfs/users?username="+encodeURIComponent(u),{method:"DELETE"});showUsers()}catch(e){alert(e.message)}}
-init();
+function toggleTheme(){const dark=document.documentElement.classList.toggle("dark");localStorage.setItem("chfs-theme",dark?"dark":"light")}
+if(localStorage.getItem("chfs-theme")==="dark"||(localStorage.getItem("chfs-theme")===null&&matchMedia("(prefers-color-scheme: dark)").matches))document.documentElement.classList.add("dark");
+setView(localStorage.getItem("chfs-view")||"list");init();
 </script>
 </body></html>