content.js

// =============================================================================
// Chat Archive — Content Script (Built)
// =============================================================================
// Auto-generated by build.sh. Do not edit directly — edit files in src/ instead.
//
// Phase 2: Pass 0 clipboard extraction (all 5 platforms) + Pass 1 heuristics
//          + JSON & Markdown export
//
// Zero network. Zero telemetry. Conversations never leave your browser.
// =============================================================================

(function() {
'use strict';


// --- src/vendor/jszip.min.js ---
/*!

JSZip v3.10.1 - A JavaScript class for generating and reading zip files
<http://stuartk.com/jszip>

(c) 2009-2016 Stuart Knightley <stuart [at] stuartk.com>
Dual licenced under the MIT license or GPLv3. See https://raw.github.com/Stuk/jszip/main/LICENSE.markdown.

JSZip uses the library pako released under the MIT license :
https://github.com/nodeca/pako/blob/main/LICENSE
*/

!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{("undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this).JSZip=e()}}(function(){return function s(a,o,h){function u(r,e){if(!o[r]){if(!a[r]){var t="function"==typeof require&&require;if(!e&&t)return t(r,!0);if(l)return l(r,!0);var n=new Error("Cannot find module '"+r+"'");throw n.code="MODULE_NOT_FOUND",n}var i=o[r]={exports:{}};a[r][0].call(i.exports,function(e){var t=a[r][1][e];return u(t||e)},i,i.exports,s,a,o,h)}return o[r].exports}for(var l="function"==typeof require&&require,e=0;e<h.length;e++)u(h[e]);return u}({1:[function(e,t,r){"use strict";var d=e("./utils"),c=e("./support"),p="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";r.encode=function(e){for(var t,r,n,i,s,a,o,h=[],u=0,l=e.length,f=l,c="string"!==d.getTypeOf(e);u<e.length;)f=l-u,n=c?(t=e[u++],r=u<l?e[u++]:0,u<l?e[u++]:0):(t=e.charCodeAt(u++),r=u<l?e.charCodeAt(u++):0,u<l?e.charCodeAt(u++):0),i=t>>2,s=(3&t)<<4|r>>4,a=1<f?(15&r)<<2|n>>6:64,o=2<f?63&n:64,h.push(p.charAt(i)+p.charAt(s)+p.charAt(a)+p.charAt(o));return h.join("")},r.decode=function(e){var t,r,n,i,s,a,o=0,h=0,u="data:";if(e.substr(0,u.length)===u)throw new Error("Invalid base64 input, it looks like a data url.");var l,f=3*(e=e.replace(/[^A-Za-z0-9+/=]/g,"")).length/4;if(e.charAt(e.length-1)===p.charAt(64)&&f--,e.charAt(e.length-2)===p.charAt(64)&&f--,f%1!=0)throw new Error("Invalid base64 input, bad content length.");for(l=c.uint8array?new Uint8Array(0|f):new Array(0|f);o<e.length;)t=p.indexOf(e.charAt(o++))<<2|(i=p.indexOf(e.charAt(o++)))>>4,r=(15&i)<<4|(s=p.indexOf(e.charAt(o++)))>>2,n=(3&s)<<6|(a=p.indexOf(e.charAt(o++))),l[h++]=t,64!==s&&(l[h++]=r),64!==a&&(l[h++]=n);return l}},{"./support":30,"./utils":32}],2:[function(e,t,r){"use strict";var n=e("./external"),i=e("./stream/DataWorker"),s=e("./stream/Crc32Probe"),a=e("./stream/DataLengthProbe");function o(e,t,r,n,i){this.compressedSize=e,this.uncompressedSize=t,this.crc32=r,this.compression=n,this.compressedContent=i}o.prototype={getContentWorker:function(){var e=new i(n.Promise.resolve(this.compressedContent)).pipe(this.compression.uncompressWorker()).pipe(new a("data_length")),t=this;return e.on("end",function(){if(this.streamInfo.data_length!==t.uncompressedSize)throw new Error("Bug : uncompressed data size mismatch")}),e},getCompressedWorker:function(){return new i(n.Promise.resolve(this.compressedContent)).withStreamInfo("compressedSize",this.compressedSize).withStreamInfo("uncompressedSize",this.uncompressedSize).withStreamInfo("crc32",this.crc32).withStreamInfo("compression",this.compression)}},o.createWorkerFrom=function(e,t,r){return e.pipe(new s).pipe(new a("uncompressedSize")).pipe(t.compressWorker(r)).pipe(new a("compressedSize")).withStreamInfo("compression",t)},t.exports=o},{"./external":6,"./stream/Crc32Probe":25,"./stream/DataLengthProbe":26,"./stream/DataWorker":27}],3:[function(e,t,r){"use strict";var n=e("./stream/GenericWorker");r.STORE={magic:"\0\0",compressWorker:function(){return new n("STORE compression")},uncompressWorker:function(){return new n("STORE decompression")}},r.DEFLATE=e("./flate")},{"./flate":7,"./stream/GenericWorker":28}],4:[function(e,t,r){"use strict";var n=e("./utils");var o=function(){for(var e,t=[],r=0;r<256;r++){e=r;for(var n=0;n<8;n++)e=1&e?3988292384^e>>>1:e>>>1;t[r]=e}return t}();t.exports=function(e,t){return void 0!==e&&e.length?"string"!==n.getTypeOf(e)?function(e,t,r,n){var i=o,s=n+r;e^=-1;for(var a=n;a<s;a++)e=e>>>8^i[255&(e^t[a])];return-1^e}(0|t,e,e.length,0):function(e,t,r,n){var i=o,s=n+r;e^=-1;for(var a=n;a<s;a++)e=e>>>8^i[255&(e^t.charCodeAt(a))];return-1^e}(0|t,e,e.length,0):0}},{"./utils":32}],5:[function(e,t,r){"use strict";r.base64=!1,r.binary=!1,r.dir=!1,r.createFolders=!0,r.date=null,r.compression=null,r.compressionOptions=null,r.comment=null,r.unixPermissions=null,r.dosPermissions=null},{}],6:[function(e,t,r){"use strict";var n=null;n="undefined"!=typeof Promise?Promise:e("lie"),t.exports={Promise:n}},{lie:37}],7:[function(e,t,r){"use strict";var n="undefined"!=typeof Uint8Array&&"undefined"!=typeof Uint16Array&&"undefined"!=typeof Uint32Array,i=e("pako"),s=e("./utils"),a=e("./stream/GenericWorker"),o=n?"uint8array":"array";function h(e,t){a.call(this,"FlateWorker/"+e),this._pako=null,this._pakoAction=e,this._pakoOptions=t,this.meta={}}r.magic="\b\0",s.inherits(h,a),h.prototype.processChunk=function(e){this.meta=e.meta,null===this._pako&&this._createPako(),this._pako.push(s.transformTo(o,e.data),!1)},h.prototype.flush=function(){a.prototype.flush.call(this),null===this._pako&&this._createPako(),this._pako.push([],!0)},h.prototype.cleanUp=function(){a.prototype.cleanUp.call(this),this._pako=null},h.prototype._createPako=function(){this._pako=new i[this._pakoAction]({raw:!0,level:this._pakoOptions.level||-1});var t=this;this._pako.onData=function(e){t.push({data:e,meta:t.meta})}},r.compressWorker=function(e){return new h("Deflate",e)},r.uncompressWorker=function(){return new h("Inflate",{})}},{"./stream/GenericWorker":28,"./utils":32,pako:38}],8:[function(e,t,r){"use strict";function A(e,t){var r,n="";for(r=0;r<t;r++)n+=String.fromCharCode(255&e),e>>>=8;return n}function n(e,t,r,n,i,s){var a,o,h=e.file,u=e.compression,l=s!==O.utf8encode,f=I.transformTo("string",s(h.name)),c=I.transformTo("string",O.utf8encode(h.name)),d=h.comment,p=I.transformTo("string",s(d)),m=I.transformTo("string",O.utf8encode(d)),_=c.length!==h.name.length,g=m.length!==d.length,b="",v="",y="",w=h.dir,k=h.date,x={crc32:0,compressedSize:0,uncompressedSize:0};t&&!r||(x.crc32=e.crc32,x.compressedSize=e.compressedSize,x.uncompressedSize=e.uncompressedSize);var S=0;t&&(S|=8),l||!_&&!g||(S|=2048);var z=0,C=0;w&&(z|=16),"UNIX"===i?(C=798,z|=function(e,t){var r=e;return e||(r=t?16893:33204),(65535&r)<<16}(h.unixPermissions,w)):(C=20,z|=function(e){return 63&(e||0)}(h.dosPermissions)),a=k.getUTCHours(),a<<=6,a|=k.getUTCMinutes(),a<<=5,a|=k.getUTCSeconds()/2,o=k.getUTCFullYear()-1980,o<<=4,o|=k.getUTCMonth()+1,o<<=5,o|=k.getUTCDate(),_&&(v=A(1,1)+A(B(f),4)+c,b+="up"+A(v.length,2)+v),g&&(y=A(1,1)+A(B(p),4)+m,b+="uc"+A(y.length,2)+y);var E="";return E+="\n\0",E+=A(S,2),E+=u.magic,E+=A(a,2),E+=A(o,2),E+=A(x.crc32,4),E+=A(x.compressedSize,4),E+=A(x.uncompressedSize,4),E+=A(f.length,2),E+=A(b.length,2),{fileRecord:R.LOCAL_FILE_HEADER+E+f+b,dirRecord:R.CENTRAL_FILE_HEADER+A(C,2)+E+A(p.length,2)+"\0\0\0\0"+A(z,4)+A(n,4)+f+b+p}}var I=e("../utils"),i=e("../stream/GenericWorker"),O=e("../utf8"),B=e("../crc32"),R=e("../signature");function s(e,t,r,n){i.call(this,"ZipFileWorker"),this.bytesWritten=0,this.zipComment=t,this.zipPlatform=r,this.encodeFileName=n,this.streamFiles=e,this.accumulate=!1,this.contentBuffer=[],this.dirRecords=[],this.currentSourceOffset=0,this.entriesCount=0,this.currentFile=null,this._sources=[]}I.inherits(s,i),s.prototype.push=function(e){var t=e.meta.percent||0,r=this.entriesCount,n=this._sources.length;this.accumulate?this.contentBuffer.push(e):(this.bytesWritten+=e.data.length,i.prototype.push.call(this,{data:e.data,meta:{currentFile:this.currentFile,percent:r?(t+100*(r-n-1))/r:100}}))},s.prototype.openedSource=function(e){this.currentSourceOffset=this.bytesWritten,this.currentFile=e.file.name;var t=this.streamFiles&&!e.file.dir;if(t){var r=n(e,t,!1,this.currentSourceOffset,this.zipPlatform,this.encodeFileName);this.push({data:r.fileRecord,meta:{percent:0}})}else this.accumulate=!0},s.prototype.closedSource=function(e){this.accumulate=!1;var t=this.streamFiles&&!e.file.dir,r=n(e,t,!0,this.currentSourceOffset,this.zipPlatform,this.encodeFileName);if(this.dirRecords.push(r.dirRecord),t)this.push({data:function(e){return R.DATA_DESCRIPTOR+A(e.crc32,4)+A(e.compressedSize,4)+A(e.uncompressedSize,4)}(e),meta:{percent:100}});else for(this.push({data:r.fileRecord,meta:{percent:0}});this.contentBuffer.length;)this.push(this.contentBuffer.shift());this.currentFile=null},s.prototype.flush=function(){for(var e=this.bytesWritten,t=0;t<this.dirRecords.length;t++)this.push({data:this.dirRecords[t],meta:{percent:100}});var r=this.bytesWritten-e,n=function(e,t,r,n,i){var s=I.transformTo("string",i(n));return R.CENTRAL_DIRECTORY_END+"\0\0\0\0"+A(e,2)+A(e,2)+A(t,4)+A(r,4)+A(s.length,2)+s}(this.dirRecords.length,r,e,this.zipComment,this.encodeFileName);this.push({data:n,meta:{percent:100}})},s.prototype.prepareNextSource=function(){this.previous=this._sources.shift(),this.openedSource(this.previous.streamInfo),this.isPaused?this.previous.pause():this.previous.resume()},s.prototype.registerPrevious=function(e){this._sources.push(e);var t=this;return e.on("data",function(e){t.processChunk(e)}),e.on("end",function(){t.closedSource(t.previous.streamInfo),t._sources.length?t.prepareNextSource():t.end()}),e.on("error",function(e){t.error(e)}),this},s.prototype.resume=function(){return!!i.prototype.resume.call(this)&&(!this.previous&&this._sources.length?(this.prepareNextSource(),!0):this.previous||this._sources.length||this.generatedError?void 0:(this.end(),!0))},s.prototype.error=function(e){var t=this._sources;if(!i.prototype.error.call(this,e))return!1;for(var r=0;r<t.length;r++)try{t[r].error(e)}catch(e){}return!0},s.prototype.lock=function(){i.prototype.lock.call(this);for(var e=this._sources,t=0;t<e.length;t++)e[t].lock()},t.exports=s},{"../crc32":4,"../signature":23,"../stream/GenericWorker":28,"../utf8":31,"../utils":32}],9:[function(e,t,r){"use strict";var u=e("../compressions"),n=e("./ZipFileWorker");r.generateWorker=function(e,a,t){var o=new n(a.streamFiles,t,a.platform,a.encodeFileName),h=0;try{e.forEach(function(e,t){h++;var r=function(e,t){var r=e||t,n=u[r];if(!n)throw new Error(r+" is not a valid compression method !");return n}(t.options.compression,a.compression),n=t.options.compressionOptions||a.compressionOptions||{},i=t.dir,s=t.date;t._compressWorker(r,n).withStreamInfo("file",{name:e,dir:i,date:s,comment:t.comment||"",unixPermissions:t.unixPermissions,dosPermissions:t.dosPermissions}).pipe(o)}),o.entriesCount=h}catch(e){o.error(e)}return o}},{"../compressions":3,"./ZipFileWorker":8}],10:[function(e,t,r){"use strict";function n(){if(!(this instanceof n))return new n;if(arguments.length)throw new Error("The constructor with parameters has been removed in JSZip 3.0, please check the upgrade guide.");this.files=Object.create(null),this.comment=null,this.root="",this.clone=function(){var e=new n;for(var t in this)"function"!=typeof this[t]&&(e[t]=this[t]);return e}}(n.prototype=e("./object")).loadAsync=e("./load"),n.support=e("./support"),n.defaults=e("./defaults"),n.version="3.10.1",n.loadAsync=function(e,t){return(new n).loadAsync(e,t)},n.external=e("./external"),t.exports=n},{"./defaults":5,"./external":6,"./load":11,"./object":15,"./support":30}],11:[function(e,t,r){"use strict";var u=e("./utils"),i=e("./external"),n=e("./utf8"),s=e("./zipEntries"),a=e("./stream/Crc32Probe"),l=e("./nodejsUtils");function f(n){return new i.Promise(function(e,t){var r=n.decompressed.getContentWorker().pipe(new a);r.on("error",function(e){t(e)}).on("end",function(){r.streamInfo.crc32!==n.decompressed.crc32?t(new Error("Corrupted zip : CRC32 mismatch")):e()}).resume()})}t.exports=function(e,o){var h=this;return o=u.extend(o||{},{base64:!1,checkCRC32:!1,optimizedBinaryString:!1,createFolders:!1,decodeFileName:n.utf8decode}),l.isNode&&l.isStream(e)?i.Promise.reject(new Error("JSZip can't accept a stream when loading a zip file.")):u.prepareContent("the loaded zip file",e,!0,o.optimizedBinaryString,o.base64).then(function(e){var t=new s(o);return t.load(e),t}).then(function(e){var t=[i.Promise.resolve(e)],r=e.files;if(o.checkCRC32)for(var n=0;n<r.length;n++)t.push(f(r[n]));return i.Promise.all(t)}).then(function(e){for(var t=e.shift(),r=t.files,n=0;n<r.length;n++){var i=r[n],s=i.fileNameStr,a=u.resolve(i.fileNameStr);h.file(a,i.decompressed,{binary:!0,optimizedBinaryString:!0,date:i.date,dir:i.dir,comment:i.fileCommentStr.length?i.fileCommentStr:null,unixPermissions:i.unixPermissions,dosPermissions:i.dosPermissions,createFolders:o.createFolders}),i.dir||(h.file(a).unsafeOriginalName=s)}return t.zipComment.length&&(h.comment=t.zipComment),h})}},{"./external":6,"./nodejsUtils":14,"./stream/Crc32Probe":25,"./utf8":31,"./utils":32,"./zipEntries":33}],12:[function(e,t,r){"use strict";var n=e("../utils"),i=e("../stream/GenericWorker");function s(e,t){i.call(this,"Nodejs stream input adapter for "+e),this._upstreamEnded=!1,this._bindStream(t)}n.inherits(s,i),s.prototype._bindStream=function(e){var t=this;(this._stream=e).pause(),e.on("data",function(e){t.push({data:e,meta:{percent:0}})}).on("error",function(e){t.isPaused?this.generatedError=e:t.error(e)}).on("end",function(){t.isPaused?t._upstreamEnded=!0:t.end()})},s.prototype.pause=function(){return!!i.prototype.pause.call(this)&&(this._stream.pause(),!0)},s.prototype.resume=function(){return!!i.prototype.resume.call(this)&&(this._upstreamEnded?this.end():this._stream.resume(),!0)},t.exports=s},{"../stream/GenericWorker":28,"../utils":32}],13:[function(e,t,r){"use strict";var i=e("readable-stream").Readable;function n(e,t,r){i.call(this,t),this._helper=e;var n=this;e.on("data",function(e,t){n.push(e)||n._helper.pause(),r&&r(t)}).on("error",function(e){n.emit("error",e)}).on("end",function(){n.push(null)})}e("../utils").inherits(n,i),n.prototype._read=function(){this._helper.resume()},t.exports=n},{"../utils":32,"readable-stream":16}],14:[function(e,t,r){"use strict";t.exports={isNode:"undefined"!=typeof Buffer,newBufferFrom:function(e,t){if(Buffer.from&&Buffer.from!==Uint8Array.from)return Buffer.from(e,t);if("number"==typeof e)throw new Error('The "data" argument must not be a number');return new Buffer(e,t)},allocBuffer:function(e){if(Buffer.alloc)return Buffer.alloc(e);var t=new Buffer(e);return t.fill(0),t},isBuffer:function(e){return Buffer.isBuffer(e)},isStream:function(e){return e&&"function"==typeof e.on&&"function"==typeof e.pause&&"function"==typeof e.resume}}},{}],15:[function(e,t,r){"use strict";function s(e,t,r){var n,i=u.getTypeOf(t),s=u.extend(r||{},f);s.date=s.date||new Date,null!==s.compression&&(s.compression=s.compression.toUpperCase()),"string"==typeof s.unixPermissions&&(s.unixPermissions=parseInt(s.unixPermissions,8)),s.unixPermissions&&16384&s.unixPermissions&&(s.dir=!0),s.dosPermissions&&16&s.dosPermissions&&(s.dir=!0),s.dir&&(e=g(e)),s.createFolders&&(n=_(e))&&b.call(this,n,!0);var a="string"===i&&!1===s.binary&&!1===s.base64;r&&void 0!==r.binary||(s.binary=!a),(t instanceof c&&0===t.uncompressedSize||s.dir||!t||0===t.length)&&(s.base64=!1,s.binary=!0,t="",s.compression="STORE",i="string");var o=null;o=t instanceof c||t instanceof l?t:p.isNode&&p.isStream(t)?new m(e,t):u.prepareContent(e,t,s.binary,s.optimizedBinaryString,s.base64);var h=new d(e,o,s);this.files[e]=h}var i=e("./utf8"),u=e("./utils"),l=e("./stream/GenericWorker"),a=e("./stream/StreamHelper"),f=e("./defaults"),c=e("./compressedObject"),d=e("./zipObject"),o=e("./generate"),p=e("./nodejsUtils"),m=e("./nodejs/NodejsStreamInputAdapter"),_=function(e){"/"===e.slice(-1)&&(e=e.substring(0,e.length-1));var t=e.lastIndexOf("/");return 0<t?e.substring(0,t):""},g=function(e){return"/"!==e.slice(-1)&&(e+="/"),e},b=function(e,t){return t=void 0!==t?t:f.createFolders,e=g(e),this.files[e]||s.call(this,e,null,{dir:!0,createFolders:t}),this.files[e]};function h(e){return"[object RegExp]"===Object.prototype.toString.call(e)}var n={load:function(){throw new Error("This method has been removed in JSZip 3.0, please check the upgrade guide.")},forEach:function(e){var t,r,n;for(t in this.files)n=this.files[t],(r=t.slice(this.root.length,t.length))&&t.slice(0,this.root.length)===this.root&&e(r,n)},filter:function(r){var n=[];return this.forEach(function(e,t){r(e,t)&&n.push(t)}),n},file:function(e,t,r){if(1!==arguments.length)return e=this.root+e,s.call(this,e,t,r),this;if(h(e)){var n=e;return this.filter(function(e,t){return!t.dir&&n.test(e)})}var i=this.files[this.root+e];return i&&!i.dir?i:null},folder:function(r){if(!r)return this;if(h(r))return this.filter(function(e,t){return t.dir&&r.test(e)});var e=this.root+r,t=b.call(this,e),n=this.clone();return n.root=t.name,n},remove:function(r){r=this.root+r;var e=this.files[r];if(e||("/"!==r.slice(-1)&&(r+="/"),e=this.files[r]),e&&!e.dir)delete this.files[r];else for(var t=this.filter(function(e,t){return t.name.slice(0,r.length)===r}),n=0;n<t.length;n++)delete this.files[t[n].name];return this},generate:function(){throw new Error("This method has been removed in JSZip 3.0, please check the upgrade guide.")},generateInternalStream:function(e){var t,r={};try{if((r=u.extend(e||{},{streamFiles:!1,compression:"STORE",compressionOptions:null,type:"",platform:"DOS",comment:null,mimeType:"application/zip",encodeFileName:i.utf8encode})).type=r.type.toLowerCase(),r.compression=r.compression.toUpperCase(),"binarystring"===r.type&&(r.type="string"),!r.type)throw new Error("No output type specified.");u.checkSupport(r.type),"darwin"!==r.platform&&"freebsd"!==r.platform&&"linux"!==r.platform&&"sunos"!==r.platform||(r.platform="UNIX"),"win32"===r.platform&&(r.platform="DOS");var n=r.comment||this.comment||"";t=o.generateWorker(this,r,n)}catch(e){(t=new l("error")).error(e)}return new a(t,r.type||"string",r.mimeType)},generateAsync:function(e,t){return this.generateInternalStream(e).accumulate(t)},generateNodeStream:function(e,t){return(e=e||{}).type||(e.type="nodebuffer"),this.generateInternalStream(e).toNodejsStream(t)}};t.exports=n},{"./compressedObject":2,"./defaults":5,"./generate":9,"./nodejs/NodejsStreamInputAdapter":12,"./nodejsUtils":14,"./stream/GenericWorker":28,"./stream/StreamHelper":29,"./utf8":31,"./utils":32,"./zipObject":35}],16:[function(e,t,r){"use strict";t.exports=e("stream")},{stream:void 0}],17:[function(e,t,r){"use strict";var n=e("./DataReader");function i(e){n.call(this,e);for(var t=0;t<this.data.length;t++)e[t]=255&e[t]}e("../utils").inherits(i,n),i.prototype.byteAt=function(e){return this.data[this.zero+e]},i.prototype.lastIndexOfSignature=function(e){for(var t=e.charCodeAt(0),r=e.charCodeAt(1),n=e.charCodeAt(2),i=e.charCodeAt(3),s=this.length-4;0<=s;--s)if(this.data[s]===t&&this.data[s+1]===r&&this.data[s+2]===n&&this.data[s+3]===i)return s-this.zero;return-1},i.prototype.readAndCheckSignature=function(e){var t=e.charCodeAt(0),r=e.charCodeAt(1),n=e.charCodeAt(2),i=e.charCodeAt(3),s=this.readData(4);return t===s[0]&&r===s[1]&&n===s[2]&&i===s[3]},i.prototype.readData=function(e){if(this.checkOffset(e),0===e)return[];var t=this.data.slice(this.zero+this.index,this.zero+this.index+e);return this.index+=e,t},t.exports=i},{"../utils":32,"./DataReader":18}],18:[function(e,t,r){"use strict";var n=e("../utils");function i(e){this.data=e,this.length=e.length,this.index=0,this.zero=0}i.prototype={checkOffset:function(e){this.checkIndex(this.index+e)},checkIndex:function(e){if(this.length<this.zero+e||e<0)throw new Error("End of data reached (data length = "+this.length+", asked index = "+e+"). 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Is it in a supported JavaScript type (String, Blob, ArrayBuffer, etc) ?"))})}},{"./base64":1,"./external":6,"./nodejsUtils":14,"./support":30,setimmediate:54}],33:[function(e,t,r){"use strict";var n=e("./reader/readerFor"),i=e("./utils"),s=e("./signature"),a=e("./zipEntry"),o=e("./support");function h(e){this.files=[],this.loadOptions=e}h.prototype={checkSignature:function(e){if(!this.reader.readAndCheckSignature(e)){this.reader.index-=4;var t=this.reader.readString(4);throw new Error("Corrupted zip or bug: unexpected signature ("+i.pretty(t)+", expected "+i.pretty(e)+")")}},isSignature:function(e,t){var r=this.reader.index;this.reader.setIndex(e);var n=this.reader.readString(4)===t;return this.reader.setIndex(r),n},readBlockEndOfCentral:function(){this.diskNumber=this.reader.readInt(2),this.diskWithCentralDirStart=this.reader.readInt(2),this.centralDirRecordsOnThisDisk=this.reader.readInt(2),this.centralDirRecords=this.reader.readInt(2),this.centralDirSize=this.reader.readInt(4),this.centralDirOffset=this.reader.readInt(4),this.zipCommentLength=this.reader.readInt(2);var e=this.reader.readData(this.zipCommentLength),t=o.uint8array?"uint8array":"array",r=i.transformTo(t,e);this.zipComment=this.loadOptions.decodeFileName(r)},readBlockZip64EndOfCentral:function(){this.zip64EndOfCentralSize=this.reader.readInt(8),this.reader.skip(4),this.diskNumber=this.reader.readInt(4),this.diskWithCentralDirStart=this.reader.readInt(4),this.centralDirRecordsOnThisDisk=this.reader.readInt(8),this.centralDirRecords=this.reader.readInt(8),this.centralDirSize=this.reader.readInt(8),this.centralDirOffset=this.reader.readInt(8),this.zip64ExtensibleData={};for(var e,t,r,n=this.zip64EndOfCentralSize-44;0<n;)e=this.reader.readInt(2),t=this.reader.readInt(4),r=this.reader.readData(t),this.zip64ExtensibleData[e]={id:e,length:t,value:r}},readBlockZip64EndOfCentralLocator:function(){if(this.diskWithZip64CentralDirStart=this.reader.readInt(4),this.relativeOffsetEndOfZip64CentralDir=this.reader.readInt(8),this.disksCount=this.reader.readInt(4),1<this.disksCount)throw new Error("Multi-volumes zip are not supported")},readLocalFiles:function(){var e,t;for(e=0;e<this.files.length;e++)t=this.files[e],this.reader.setIndex(t.localHeaderOffset),this.checkSignature(s.LOCAL_FILE_HEADER),t.readLocalPart(this.reader),t.handleUTF8(),t.processAttributes()},readCentralDir:function(){var e;for(this.reader.setIndex(this.centralDirOffset);this.reader.readAndCheckSignature(s.CENTRAL_FILE_HEADER);)(e=new a({zip64:this.zip64},this.loadOptions)).readCentralPart(this.reader),this.files.push(e);if(this.centralDirRecords!==this.files.length&&0!==this.centralDirRecords&&0===this.files.length)throw new Error("Corrupted zip or bug: expected "+this.centralDirRecords+" records in central dir, got "+this.files.length)},readEndOfCentral:function(){var e=this.reader.lastIndexOfSignature(s.CENTRAL_DIRECTORY_END);if(e<0)throw!this.isSignature(0,s.LOCAL_FILE_HEADER)?new Error("Can't find end of central directory : is this a zip file ? If it is, see https://stuk.github.io/jszip/documentation/howto/read_zip.html"):new Error("Corrupted zip: can't find end of central directory");this.reader.setIndex(e);var t=e;if(this.checkSignature(s.CENTRAL_DIRECTORY_END),this.readBlockEndOfCentral(),this.diskNumber===i.MAX_VALUE_16BITS||this.diskWithCentralDirStart===i.MAX_VALUE_16BITS||this.centralDirRecordsOnThisDisk===i.MAX_VALUE_16BITS||this.centralDirRecords===i.MAX_VALUE_16BITS||this.centralDirSize===i.MAX_VALUE_32BITS||this.centralDirOffset===i.MAX_VALUE_32BITS){if(this.zip64=!0,(e=this.reader.lastIndexOfSignature(s.ZIP64_CENTRAL_DIRECTORY_LOCATOR))<0)throw new Error("Corrupted zip: can't find the ZIP64 end of central directory locator");if(this.reader.setIndex(e),this.checkSignature(s.ZIP64_CENTRAL_DIRECTORY_LOCATOR),this.readBlockZip64EndOfCentralLocator(),!this.isSignature(this.relativeOffsetEndOfZip64CentralDir,s.ZIP64_CENTRAL_DIRECTORY_END)&&(this.relativeOffsetEndOfZip64CentralDir=this.reader.lastIndexOfSignature(s.ZIP64_CENTRAL_DIRECTORY_END),this.relativeOffsetEndOfZip64CentralDir<0))throw new Error("Corrupted zip: can't find the ZIP64 end of central directory");this.reader.setIndex(this.relativeOffsetEndOfZip64CentralDir),this.checkSignature(s.ZIP64_CENTRAL_DIRECTORY_END),this.readBlockZip64EndOfCentral()}var r=this.centralDirOffset+this.centralDirSize;this.zip64&&(r+=20,r+=12+this.zip64EndOfCentralSize);var n=t-r;if(0<n)this.isSignature(t,s.CENTRAL_FILE_HEADER)||(this.reader.zero=n);else if(n<0)throw new Error("Corrupted zip: missing "+Math.abs(n)+" bytes.")},prepareReader:function(e){this.reader=n(e)},load:function(e){this.prepareReader(e),this.readEndOfCentral(),this.readCentralDir(),this.readLocalFiles()}},t.exports=h},{"./reader/readerFor":22,"./signature":23,"./support":30,"./utils":32,"./zipEntry":34}],34:[function(e,t,r){"use strict";var n=e("./reader/readerFor"),s=e("./utils"),i=e("./compressedObject"),a=e("./crc32"),o=e("./utf8"),h=e("./compressions"),u=e("./support");function l(e,t){this.options=e,this.loadOptions=t}l.prototype={isEncrypted:function(){return 1==(1&this.bitFlag)},useUTF8:function(){return 2048==(2048&this.bitFlag)},readLocalPart:function(e){var t,r;if(e.skip(22),this.fileNameLength=e.readInt(2),r=e.readInt(2),this.fileName=e.readData(this.fileNameLength),e.skip(r),-1===this.compressedSize||-1===this.uncompressedSize)throw new Error("Bug or corrupted zip : didn't get enough information from the central directory (compressedSize === -1 || uncompressedSize === -1)");if(null===(t=function(e){for(var t in h)if(Object.prototype.hasOwnProperty.call(h,t)&&h[t].magic===e)return h[t];return null}(this.compressionMethod)))throw new Error("Corrupted zip : compression "+s.pretty(this.compressionMethod)+" unknown (inner file : "+s.transformTo("string",this.fileName)+")");this.decompressed=new i(this.compressedSize,this.uncompressedSize,this.crc32,t,e.readData(this.compressedSize))},readCentralPart:function(e){this.versionMadeBy=e.readInt(2),e.skip(2),this.bitFlag=e.readInt(2),this.compressionMethod=e.readString(2),this.date=e.readDate(),this.crc32=e.readInt(4),this.compressedSize=e.readInt(4),this.uncompressedSize=e.readInt(4);var t=e.readInt(2);if(this.extraFieldsLength=e.readInt(2),this.fileCommentLength=e.readInt(2),this.diskNumberStart=e.readInt(2),this.internalFileAttributes=e.readInt(2),this.externalFileAttributes=e.readInt(4),this.localHeaderOffset=e.readInt(4),this.isEncrypted())throw new Error("Encrypted zip are not supported");e.skip(t),this.readExtraFields(e),this.parseZIP64ExtraField(e),this.fileComment=e.readData(this.fileCommentLength)},processAttributes:function(){this.unixPermissions=null,this.dosPermissions=null;var e=this.versionMadeBy>>8;this.dir=!!(16&this.externalFileAttributes),0==e&&(this.dosPermissions=63&this.externalFileAttributes),3==e&&(this.unixPermissions=this.externalFileAttributes>>16&65535),this.dir||"/"!==this.fileNameStr.slice(-1)||(this.dir=!0)},parseZIP64ExtraField:function(){if(this.extraFields[1]){var e=n(this.extraFields[1].value);this.uncompressedSize===s.MAX_VALUE_32BITS&&(this.uncompressedSize=e.readInt(8)),this.compressedSize===s.MAX_VALUE_32BITS&&(this.compressedSize=e.readInt(8)),this.localHeaderOffset===s.MAX_VALUE_32BITS&&(this.localHeaderOffset=e.readInt(8)),this.diskNumberStart===s.MAX_VALUE_32BITS&&(this.diskNumberStart=e.readInt(4))}},readExtraFields:function(e){var t,r,n,i=e.index+this.extraFieldsLength;for(this.extraFields||(this.extraFields={});e.index+4<i;)t=e.readInt(2),r=e.readInt(2),n=e.readData(r),this.extraFields[t]={id:t,length:r,value:n};e.setIndex(i)},handleUTF8:function(){var e=u.uint8array?"uint8array":"array";if(this.useUTF8())this.fileNameStr=o.utf8decode(this.fileName),this.fileCommentStr=o.utf8decode(this.fileComment);else{var t=this.findExtraFieldUnicodePath();if(null!==t)this.fileNameStr=t;else{var r=s.transformTo(e,this.fileName);this.fileNameStr=this.loadOptions.decodeFileName(r)}var n=this.findExtraFieldUnicodeComment();if(null!==n)this.fileCommentStr=n;else{var i=s.transformTo(e,this.fileComment);this.fileCommentStr=this.loadOptions.decodeFileName(i)}}},findExtraFieldUnicodePath:function(){var e=this.extraFields[28789];if(e){var t=n(e.value);return 1!==t.readInt(1)?null:a(this.fileName)!==t.readInt(4)?null:o.utf8decode(t.readData(e.length-5))}return null},findExtraFieldUnicodeComment:function(){var e=this.extraFields[25461];if(e){var t=n(e.value);return 1!==t.readInt(1)?null:a(this.fileComment)!==t.readInt(4)?null:o.utf8decode(t.readData(e.length-5))}return null}},t.exports=l},{"./compressedObject":2,"./compressions":3,"./crc32":4,"./reader/readerFor":22,"./support":30,"./utf8":31,"./utils":32}],35:[function(e,t,r){"use strict";function n(e,t,r){this.name=e,this.dir=r.dir,this.date=r.date,this.comment=r.comment,this.unixPermissions=r.unixPermissions,this.dosPermissions=r.dosPermissions,this._data=t,this._dataBinary=r.binary,this.options={compression:r.compression,compressionOptions:r.compressionOptions}}var s=e("./stream/StreamHelper"),i=e("./stream/DataWorker"),a=e("./utf8"),o=e("./compressedObject"),h=e("./stream/GenericWorker");n.prototype={internalStream:function(e){var t=null,r="string";try{if(!e)throw new Error("No output type specified.");var n="string"===(r=e.toLowerCase())||"text"===r;"binarystring"!==r&&"text"!==r||(r="string"),t=this._decompressWorker();var i=!this._dataBinary;i&&!n&&(t=t.pipe(new a.Utf8EncodeWorker)),!i&&n&&(t=t.pipe(new a.Utf8DecodeWorker))}catch(e){(t=new h("error")).error(e)}return new s(t,r,"")},async:function(e,t){return this.internalStream(e).accumulate(t)},nodeStream:function(e,t){return this.internalStream(e||"nodebuffer").toNodejsStream(t)},_compressWorker:function(e,t){if(this._data instanceof o&&this._data.compression.magic===e.magic)return this._data.getCompressedWorker();var r=this._decompressWorker();return this._dataBinary||(r=r.pipe(new a.Utf8EncodeWorker)),o.createWorkerFrom(r,e,t)},_decompressWorker:function(){return this._data instanceof o?this._data.getContentWorker():this._data instanceof h?this._data:new i(this._data)}};for(var u=["asText","asBinary","asNodeBuffer","asUint8Array","asArrayBuffer"],l=function(){throw new Error("This method has been removed in JSZip 3.0, please check the upgrade guide.")},f=0;f<u.length;f++)n.prototype[u[f]]=l;t.exports=n},{"./compressedObject":2,"./stream/DataWorker":27,"./stream/GenericWorker":28,"./stream/StreamHelper":29,"./utf8":31}],36:[function(e,l,t){(function(t){"use strict";var r,n,e=t.MutationObserver||t.WebKitMutationObserver;if(e){var i=0,s=new e(u),a=t.document.createTextNode("");s.observe(a,{characterData:!0}),r=function(){a.data=i=++i%2}}else if(t.setImmediate||void 0===t.MessageChannel)r="document"in t&&"onreadystatechange"in t.document.createElement("script")?function(){var e=t.document.createElement("script");e.onreadystatechange=function(){u(),e.onreadystatechange=null,e.parentNode.removeChild(e),e=null},t.document.documentElement.appendChild(e)}:function(){setTimeout(u,0)};else{var o=new t.MessageChannel;o.port1.onmessage=u,r=function(){o.port2.postMessage(0)}}var h=[];function u(){var e,t;n=!0;for(var r=h.length;r;){for(t=h,h=[],e=-1;++e<r;)t[e]();r=h.length}n=!1}l.exports=function(e){1!==h.push(e)||n||r()}}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{}],37:[function(e,t,r){"use strict";var i=e("immediate");function u(){}var l={},s=["REJECTED"],a=["FULFILLED"],n=["PENDING"];function o(e){if("function"!=typeof e)throw new TypeError("resolver must be a function");this.state=n,this.queue=[],this.outcome=void 0,e!==u&&d(this,e)}function h(e,t,r){this.promise=e,"function"==typeof t&&(this.onFulfilled=t,this.callFulfilled=this.otherCallFulfilled),"function"==typeof r&&(this.onRejected=r,this.callRejected=this.otherCallRejected)}function f(t,r,n){i(function(){var e;try{e=r(n)}catch(e){return l.reject(t,e)}e===t?l.reject(t,new TypeError("Cannot resolve promise with itself")):l.resolve(t,e)})}function c(e){var t=e&&e.then;if(e&&("object"==typeof e||"function"==typeof e)&&"function"==typeof t)return function(){t.apply(e,arguments)}}function d(t,e){var r=!1;function n(e){r||(r=!0,l.reject(t,e))}function i(e){r||(r=!0,l.resolve(t,e))}var s=p(function(){e(i,n)});"error"===s.status&&n(s.value)}function p(e,t){var r={};try{r.value=e(t),r.status="success"}catch(e){r.status="error",r.value=e}return r}(t.exports=o).prototype.finally=function(t){if("function"!=typeof t)return this;var r=this.constructor;return this.then(function(e){return r.resolve(t()).then(function(){return e})},function(e){return r.resolve(t()).then(function(){throw e})})},o.prototype.catch=function(e){return this.then(null,e)},o.prototype.then=function(e,t){if("function"!=typeof e&&this.state===a||"function"!=typeof t&&this.state===s)return this;var r=new this.constructor(u);this.state!==n?f(r,this.state===a?e:t,this.outcome):this.queue.push(new h(r,e,t));return r},h.prototype.callFulfilled=function(e){l.resolve(this.promise,e)},h.prototype.otherCallFulfilled=function(e){f(this.promise,this.onFulfilled,e)},h.prototype.callRejected=function(e){l.reject(this.promise,e)},h.prototype.otherCallRejected=function(e){f(this.promise,this.onRejected,e)},l.resolve=function(e,t){var r=p(c,t);if("error"===r.status)return l.reject(e,r.value);var n=r.value;if(n)d(e,n);else{e.state=a,e.outcome=t;for(var i=-1,s=e.queue.length;++i<s;)e.queue[i].callFulfilled(t)}return e},l.reject=function(e,t){e.state=s,e.outcome=t;for(var r=-1,n=e.queue.length;++r<n;)e.queue[r].callRejected(t);return e},o.resolve=function(e){if(e instanceof this)return e;return l.resolve(new this(u),e)},o.reject=function(e){var t=new this(u);return l.reject(t,e)},o.all=function(e){var r=this;if("[object Array]"!==Object.prototype.toString.call(e))return this.reject(new TypeError("must be an array"));var n=e.length,i=!1;if(!n)return this.resolve([]);var s=new Array(n),a=0,t=-1,o=new this(u);for(;++t<n;)h(e[t],t);return o;function h(e,t){r.resolve(e).then(function(e){s[t]=e,++a!==n||i||(i=!0,l.resolve(o,s))},function(e){i||(i=!0,l.reject(o,e))})}},o.race=function(e){var t=this;if("[object Array]"!==Object.prototype.toString.call(e))return this.reject(new TypeError("must be an array"));var r=e.length,n=!1;if(!r)return this.resolve([]);var i=-1,s=new this(u);for(;++i<r;)a=e[i],t.resolve(a).then(function(e){n||(n=!0,l.resolve(s,e))},function(e){n||(n=!0,l.reject(s,e))});var a;return s}},{immediate:36}],38:[function(e,t,r){"use strict";var n={};(0,e("./lib/utils/common").assign)(n,e("./lib/deflate"),e("./lib/inflate"),e("./lib/zlib/constants")),t.exports=n},{"./lib/deflate":39,"./lib/inflate":40,"./lib/utils/common":41,"./lib/zlib/constants":44}],39:[function(e,t,r){"use strict";var a=e("./zlib/deflate"),o=e("./utils/common"),h=e("./utils/strings"),i=e("./zlib/messages"),s=e("./zlib/zstream"),u=Object.prototype.toString,l=0,f=-1,c=0,d=8;function p(e){if(!(this instanceof p))return new p(e);this.options=o.assign({level:f,method:d,chunkSize:16384,windowBits:15,memLevel:8,strategy:c,to:""},e||{});var t=this.options;t.raw&&0<t.windowBits?t.windowBits=-t.windowBits:t.gzip&&0<t.windowBits&&t.windowBits<16&&(t.windowBits+=16),this.err=0,this.msg="",this.ended=!1,this.chunks=[],this.strm=new s,this.strm.avail_out=0;var r=a.deflateInit2(this.strm,t.level,t.method,t.windowBits,t.memLevel,t.strategy);if(r!==l)throw new Error(i[r]);if(t.header&&a.deflateSetHeader(this.strm,t.header),t.dictionary){var n;if(n="string"==typeof t.dictionary?h.string2buf(t.dictionary):"[object ArrayBuffer]"===u.call(t.dictionary)?new Uint8Array(t.dictionary):t.dictionary,(r=a.deflateSetDictionary(this.strm,n))!==l)throw new Error(i[r]);this._dict_set=!0}}function n(e,t){var r=new p(t);if(r.push(e,!0),r.err)throw r.msg||i[r.err];return r.result}p.prototype.push=function(e,t){var r,n,i=this.strm,s=this.options.chunkSize;if(this.ended)return!1;n=t===~~t?t:!0===t?4:0,"string"==typeof e?i.input=h.string2buf(e):"[object ArrayBuffer]"===u.call(e)?i.input=new Uint8Array(e):i.input=e,i.next_in=0,i.avail_in=i.input.length;do{if(0===i.avail_out&&(i.output=new o.Buf8(s),i.next_out=0,i.avail_out=s),1!==(r=a.deflate(i,n))&&r!==l)return this.onEnd(r),!(this.ended=!0);0!==i.avail_out&&(0!==i.avail_in||4!==n&&2!==n)||("string"===this.options.to?this.onData(h.buf2binstring(o.shrinkBuf(i.output,i.next_out))):this.onData(o.shrinkBuf(i.output,i.next_out)))}while((0<i.avail_in||0===i.avail_out)&&1!==r);return 4===n?(r=a.deflateEnd(this.strm),this.onEnd(r),this.ended=!0,r===l):2!==n||(this.onEnd(l),!(i.avail_out=0))},p.prototype.onData=function(e){this.chunks.push(e)},p.prototype.onEnd=function(e){e===l&&("string"===this.options.to?this.result=this.chunks.join(""):this.result=o.flattenChunks(this.chunks)),this.chunks=[],this.err=e,this.msg=this.strm.msg},r.Deflate=p,r.deflate=n,r.deflateRaw=function(e,t){return(t=t||{}).raw=!0,n(e,t)},r.gzip=function(e,t){return(t=t||{}).gzip=!0,n(e,t)}},{"./utils/common":41,"./utils/strings":42,"./zlib/deflate":46,"./zlib/messages":51,"./zlib/zstream":53}],40:[function(e,t,r){"use strict";var c=e("./zlib/inflate"),d=e("./utils/common"),p=e("./utils/strings"),m=e("./zlib/constants"),n=e("./zlib/messages"),i=e("./zlib/zstream"),s=e("./zlib/gzheader"),_=Object.prototype.toString;function a(e){if(!(this instanceof a))return new a(e);this.options=d.assign({chunkSize:16384,windowBits:0,to:""},e||{});var 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R(e,0===e.avail_out?-5:_);if(n.strm=e,r=n.last_flush,n.last_flush=t,n.status===C)if(2===n.wrap)e.adler=0,U(n,31),U(n,139),U(n,8),n.gzhead?(U(n,(n.gzhead.text?1:0)+(n.gzhead.hcrc?2:0)+(n.gzhead.extra?4:0)+(n.gzhead.name?8:0)+(n.gzhead.comment?16:0)),U(n,255&n.gzhead.time),U(n,n.gzhead.time>>8&255),U(n,n.gzhead.time>>16&255),U(n,n.gzhead.time>>24&255),U(n,9===n.level?2:2<=n.strategy||n.level<2?4:0),U(n,255&n.gzhead.os),n.gzhead.extra&&n.gzhead.extra.length&&(U(n,255&n.gzhead.extra.length),U(n,n.gzhead.extra.length>>8&255)),n.gzhead.hcrc&&(e.adler=p(e.adler,n.pending_buf,n.pending,0)),n.gzindex=0,n.status=69):(U(n,0),U(n,0),U(n,0),U(n,0),U(n,0),U(n,9===n.level?2:2<=n.strategy||n.level<2?4:0),U(n,3),n.status=E);else{var a=v+(n.w_bits-8<<4)<<8;a|=(2<=n.strategy||n.level<2?0:n.level<6?1:6===n.level?2:3)<<6,0!==n.strstart&&(a|=32),a+=31-a%31,n.status=E,P(n,a),0!==n.strstart&&(P(n,e.adler>>>16),P(n,65535&e.adler)),e.adler=1}if(69===n.status)if(n.gzhead.extra){for(i=n.pending;n.gzindex<(65535&n.gzhead.extra.length)&&(n.pending!==n.pending_buf_size||(n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),F(e),i=n.pending,n.pending!==n.pending_buf_size));)U(n,255&n.gzhead.extra[n.gzindex]),n.gzindex++;n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),n.gzindex===n.gzhead.extra.length&&(n.gzindex=0,n.status=73)}else n.status=73;if(73===n.status)if(n.gzhead.name){i=n.pending;do{if(n.pending===n.pending_buf_size&&(n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),F(e),i=n.pending,n.pending===n.pending_buf_size)){s=1;break}s=n.gzindex<n.gzhead.name.length?255&n.gzhead.name.charCodeAt(n.gzindex++):0,U(n,s)}while(0!==s);n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),0===s&&(n.gzindex=0,n.status=91)}else n.status=91;if(91===n.status)if(n.gzhead.comment){i=n.pending;do{if(n.pending===n.pending_buf_size&&(n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),F(e),i=n.pending,n.pending===n.pending_buf_size)){s=1;break}s=n.gzindex<n.gzhead.comment.length?255&n.gzhead.comment.charCodeAt(n.gzindex++):0,U(n,s)}while(0!==s);n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),0===s&&(n.status=103)}else n.status=103;if(103===n.status&&(n.gzhead.hcrc?(n.pending+2>n.pending_buf_size&&F(e),n.pending+2<=n.pending_buf_size&&(U(n,255&e.adler),U(n,e.adler>>8&255),e.adler=0,n.status=E)):n.status=E),0!==n.pending){if(F(e),0===e.avail_out)return n.last_flush=-1,m}else if(0===e.avail_in&&T(t)<=T(r)&&t!==f)return R(e,-5);if(666===n.status&&0!==e.avail_in)return R(e,-5);if(0!==e.avail_in||0!==n.lookahead||t!==l&&666!==n.status){var o=2===n.strategy?function(e,t){for(var r;;){if(0===e.lookahead&&(j(e),0===e.lookahead)){if(t===l)return A;break}if(e.match_length=0,r=u._tr_tally(e,0,e.window[e.strstart]),e.lookahead--,e.strstart++,r&&(N(e,!1),0===e.strm.avail_out))return A}return e.insert=0,t===f?(N(e,!0),0===e.strm.avail_out?O:B):e.last_lit&&(N(e,!1),0===e.strm.avail_out)?A:I}(n,t):3===n.strategy?function(e,t){for(var r,n,i,s,a=e.window;;){if(e.lookahead<=S){if(j(e),e.lookahead<=S&&t===l)return A;if(0===e.lookahead)break}if(e.match_length=0,e.lookahead>=x&&0<e.strstart&&(n=a[i=e.strstart-1])===a[++i]&&n===a[++i]&&n===a[++i]){s=e.strstart+S;do{}while(n===a[++i]&&n===a[++i]&&n===a[++i]&&n===a[++i]&&n===a[++i]&&n===a[++i]&&n===a[++i]&&n===a[++i]&&i<s);e.match_length=S-(s-i),e.match_length>e.lookahead&&(e.match_length=e.lookahead)}if(e.match_length>=x?(r=u._tr_tally(e,1,e.match_length-x),e.lookahead-=e.match_length,e.strstart+=e.match_length,e.match_length=0):(r=u._tr_tally(e,0,e.window[e.strstart]),e.lookahead--,e.strstart++),r&&(N(e,!1),0===e.strm.avail_out))return A}return e.insert=0,t===f?(N(e,!0),0===e.strm.avail_out?O:B):e.last_lit&&(N(e,!1),0===e.strm.avail_out)?A:I}(n,t):h[n.level].func(n,t);if(o!==O&&o!==B||(n.status=666),o===A||o===O)return 0===e.avail_out&&(n.last_flush=-1),m;if(o===I&&(1===t?u._tr_align(n):5!==t&&(u._tr_stored_block(n,0,0,!1),3===t&&(D(n.head),0===n.lookahead&&(n.strstart=0,n.block_start=0,n.insert=0))),F(e),0===e.avail_out))return n.last_flush=-1,m}return t!==f?m:n.wrap<=0?1:(2===n.wrap?(U(n,255&e.adler),U(n,e.adler>>8&255),U(n,e.adler>>16&255),U(n,e.adler>>24&255),U(n,255&e.total_in),U(n,e.total_in>>8&255),U(n,e.total_in>>16&255),U(n,e.total_in>>24&255)):(P(n,e.adler>>>16),P(n,65535&e.adler)),F(e),0<n.wrap&&(n.wrap=-n.wrap),0!==n.pending?m:1)},r.deflateEnd=function(e){var t;return e&&e.state?(t=e.state.status)!==C&&69!==t&&73!==t&&91!==t&&103!==t&&t!==E&&666!==t?R(e,_):(e.state=null,t===E?R(e,-3):m):_},r.deflateSetDictionary=function(e,t){var r,n,i,s,a,o,h,u,l=t.length;if(!e||!e.state)return _;if(2===(s=(r=e.state).wrap)||1===s&&r.status!==C||r.lookahead)return _;for(1===s&&(e.adler=d(e.adler,t,l,0)),r.wrap=0,l>=r.w_size&&(0===s&&(D(r.head),r.strstart=0,r.block_start=0,r.insert=0),u=new c.Buf8(r.w_size),c.arraySet(u,t,l-r.w_size,r.w_size,0),t=u,l=r.w_size),a=e.avail_in,o=e.next_in,h=e.input,e.avail_in=l,e.next_in=0,e.input=t,j(r);r.lookahead>=x;){for(n=r.strstart,i=r.lookahead-(x-1);r.ins_h=(r.ins_h<<r.hash_shift^r.window[n+x-1])&r.hash_mask,r.prev[n&r.w_mask]=r.head[r.ins_h],r.head[r.ins_h]=n,n++,--i;);r.strstart=n,r.lookahead=x-1,j(r)}return r.strstart+=r.lookahead,r.block_start=r.strstart,r.insert=r.lookahead,r.lookahead=0,r.match_length=r.prev_length=x-1,r.match_available=0,e.next_in=o,e.input=h,e.avail_in=a,r.wrap=s,m},r.deflateInfo="pako deflate (from Nodeca project)"},{"../utils/common":41,"./adler32":43,"./crc32":45,"./messages":51,"./trees":52}],47:[function(e,t,r){"use strict";t.exports=function(){this.text=0,this.time=0,this.xflags=0,this.os=0,this.extra=null,this.extra_len=0,this.name="",this.comment="",this.hcrc=0,this.done=!1}},{}],48:[function(e,t,r){"use strict";t.exports=function(e,t){var r,n,i,s,a,o,h,u,l,f,c,d,p,m,_,g,b,v,y,w,k,x,S,z,C;r=e.state,n=e.next_in,z=e.input,i=n+(e.avail_in-5),s=e.next_out,C=e.output,a=s-(t-e.avail_out),o=s+(e.avail_out-257),h=r.dmax,u=r.wsize,l=r.whave,f=r.wnext,c=r.window,d=r.hold,p=r.bits,m=r.lencode,_=r.distcode,g=(1<<r.lenbits)-1,b=(1<<r.distbits)-1;e:do{p<15&&(d+=z[n++]<<p,p+=8,d+=z[n++]<<p,p+=8),v=m[d&g];t:for(;;){if(d>>>=y=v>>>24,p-=y,0===(y=v>>>16&255))C[s++]=65535&v;else{if(!(16&y)){if(0==(64&y)){v=m[(65535&v)+(d&(1<<y)-1)];continue t}if(32&y){r.mode=12;break e}e.msg="invalid literal/length code",r.mode=30;break e}w=65535&v,(y&=15)&&(p<y&&(d+=z[n++]<<p,p+=8),w+=d&(1<<y)-1,d>>>=y,p-=y),p<15&&(d+=z[n++]<<p,p+=8,d+=z[n++]<<p,p+=8),v=_[d&b];r:for(;;){if(d>>>=y=v>>>24,p-=y,!(16&(y=v>>>16&255))){if(0==(64&y)){v=_[(65535&v)+(d&(1<<y)-1)];continue r}e.msg="invalid distance code",r.mode=30;break e}if(k=65535&v,p<(y&=15)&&(d+=z[n++]<<p,(p+=8)<y&&(d+=z[n++]<<p,p+=8)),h<(k+=d&(1<<y)-1)){e.msg="invalid distance too far back",r.mode=30;break 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s(){this.mode=0,this.last=!1,this.wrap=0,this.havedict=!1,this.flags=0,this.dmax=0,this.check=0,this.total=0,this.head=null,this.wbits=0,this.wsize=0,this.whave=0,this.wnext=0,this.window=null,this.hold=0,this.bits=0,this.length=0,this.offset=0,this.extra=0,this.lencode=null,this.distcode=null,this.lenbits=0,this.distbits=0,this.ncode=0,this.nlen=0,this.ndist=0,this.have=0,this.next=null,this.lens=new I.Buf16(320),this.work=new I.Buf16(288),this.lendyn=null,this.distdyn=null,this.sane=0,this.back=0,this.was=0}function a(e){var t;return e&&e.state?(t=e.state,e.total_in=e.total_out=t.total=0,e.msg="",t.wrap&&(e.adler=1&t.wrap),t.mode=P,t.last=0,t.havedict=0,t.dmax=32768,t.head=null,t.hold=0,t.bits=0,t.lencode=t.lendyn=new I.Buf32(n),t.distcode=t.distdyn=new I.Buf32(i),t.sane=1,t.back=-1,N):U}function o(e){var t;return e&&e.state?((t=e.state).wsize=0,t.whave=0,t.wnext=0,a(e)):U}function h(e,t){var r,n;return e&&e.state?(n=e.state,t<0?(r=0,t=-t):(r=1+(t>>4),t<48&&(t&=15)),t&&(t<8||15<t)?U:(null!==n.window&&n.wbits!==t&&(n.window=null),n.wrap=r,n.wbits=t,o(e))):U}function u(e,t){var r,n;return e?(n=new s,(e.state=n).window=null,(r=h(e,t))!==N&&(e.state=null),r):U}var l,f,c=!0;function j(e){if(c){var t;for(l=new I.Buf32(512),f=new I.Buf32(32),t=0;t<144;)e.lens[t++]=8;for(;t<256;)e.lens[t++]=9;for(;t<280;)e.lens[t++]=7;for(;t<288;)e.lens[t++]=8;for(T(D,e.lens,0,288,l,0,e.work,{bits:9}),t=0;t<32;)e.lens[t++]=5;T(F,e.lens,0,32,f,0,e.work,{bits:5}),c=!1}e.lencode=l,e.lenbits=9,e.distcode=f,e.distbits=5}function Z(e,t,r,n){var i,s=e.state;return null===s.window&&(s.wsize=1<<s.wbits,s.wnext=0,s.whave=0,s.window=new I.Buf8(s.wsize)),n>=s.wsize?(I.arraySet(s.window,t,r-s.wsize,s.wsize,0),s.wnext=0,s.whave=s.wsize):(n<(i=s.wsize-s.wnext)&&(i=n),I.arraySet(s.window,t,r-n,i,s.wnext),(n-=i)?(I.arraySet(s.window,t,r-n,n,0),s.wnext=n,s.whave=s.wsize):(s.wnext+=i,s.wnext===s.wsize&&(s.wnext=0),s.whave<s.wsize&&(s.whave+=i))),0}r.inflateReset=o,r.inflateReset2=h,r.inflateResetKeep=a,r.inflateInit=function(e){return u(e,15)},r.inflateInit2=u,r.inflate=function(e,t){var r,n,i,s,a,o,h,u,l,f,c,d,p,m,_,g,b,v,y,w,k,x,S,z,C=0,E=new I.Buf8(4),A=[16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15];if(!e||!e.state||!e.output||!e.input&&0!==e.avail_in)return U;12===(r=e.state).mode&&(r.mode=13),a=e.next_out,i=e.output,h=e.avail_out,s=e.next_in,n=e.input,o=e.avail_in,u=r.hold,l=r.bits,f=o,c=h,x=N;e:for(;;)switch(r.mode){case P:if(0===r.wrap){r.mode=13;break}for(;l<16;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}if(2&r.wrap&&35615===u){E[r.check=0]=255&u,E[1]=u>>>8&255,r.check=B(r.check,E,2,0),l=u=0,r.mode=2;break}if(r.flags=0,r.head&&(r.head.done=!1),!(1&r.wrap)||(((255&u)<<8)+(u>>8))%31){e.msg="incorrect header check",r.mode=30;break}if(8!=(15&u)){e.msg="unknown compression method",r.mode=30;break}if(l-=4,k=8+(15&(u>>>=4)),0===r.wbits)r.wbits=k;else if(k>r.wbits){e.msg="invalid window size",r.mode=30;break}r.dmax=1<<k,e.adler=r.check=1,r.mode=512&u?10:12,l=u=0;break;case 2:for(;l<16;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}if(r.flags=u,8!=(255&r.flags)){e.msg="unknown compression method",r.mode=30;break}if(57344&r.flags){e.msg="unknown header flags set",r.mode=30;break}r.head&&(r.head.text=u>>8&1),512&r.flags&&(E[0]=255&u,E[1]=u>>>8&255,r.check=B(r.check,E,2,0)),l=u=0,r.mode=3;case 3:for(;l<32;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}r.head&&(r.head.time=u),512&r.flags&&(E[0]=255&u,E[1]=u>>>8&255,E[2]=u>>>16&255,E[3]=u>>>24&255,r.check=B(r.check,E,4,0)),l=u=0,r.mode=4;case 4:for(;l<16;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}r.head&&(r.head.xflags=255&u,r.head.os=u>>8),512&r.flags&&(E[0]=255&u,E[1]=u>>>8&255,r.check=B(r.check,E,2,0)),l=u=0,r.mode=5;case 5:if(1024&r.flags){for(;l<16;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}r.length=u,r.head&&(r.head.extra_len=u),512&r.flags&&(E[0]=255&u,E[1]=u>>>8&255,r.check=B(r.check,E,2,0)),l=u=0}else r.head&&(r.head.extra=null);r.mode=6;case 6:if(1024&r.flags&&(o<(d=r.length)&&(d=o),d&&(r.head&&(k=r.head.extra_len-r.length,r.head.extra||(r.head.extra=new Array(r.head.extra_len)),I.arraySet(r.head.extra,n,s,d,k)),512&r.flags&&(r.check=B(r.check,n,d,s)),o-=d,s+=d,r.length-=d),r.length))break e;r.length=0,r.mode=7;case 7:if(2048&r.flags){if(0===o)break e;for(d=0;k=n[s+d++],r.head&&k&&r.length<65536&&(r.head.name+=String.fromCharCode(k)),k&&d<o;);if(512&r.flags&&(r.check=B(r.check,n,d,s)),o-=d,s+=d,k)break e}else r.head&&(r.head.name=null);r.length=0,r.mode=8;case 8:if(4096&r.flags){if(0===o)break e;for(d=0;k=n[s+d++],r.head&&k&&r.length<65536&&(r.head.comment+=String.fromCharCode(k)),k&&d<o;);if(512&r.flags&&(r.check=B(r.check,n,d,s)),o-=d,s+=d,k)break e}else r.head&&(r.head.comment=null);r.mode=9;case 9:if(512&r.flags){for(;l<16;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}if(u!==(65535&r.check)){e.msg="header crc mismatch",r.mode=30;break}l=u=0}r.head&&(r.head.hcrc=r.flags>>9&1,r.head.done=!0),e.adler=r.check=0,r.mode=12;break;case 10:for(;l<32;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}e.adler=r.check=L(u),l=u=0,r.mode=11;case 11:if(0===r.havedict)return e.next_out=a,e.avail_out=h,e.next_in=s,e.avail_in=o,r.hold=u,r.bits=l,2;e.adler=r.check=1,r.mode=12;case 12:if(5===t||6===t)break e;case 13:if(r.last){u>>>=7&l,l-=7&l,r.mode=27;break}for(;l<3;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}switch(r.last=1&u,l-=1,3&(u>>>=1)){case 0:r.mode=14;break;case 1:if(j(r),r.mode=20,6!==t)break;u>>>=2,l-=2;break e;case 2:r.mode=17;break;case 3:e.msg="invalid block type",r.mode=30}u>>>=2,l-=2;break;case 14:for(u>>>=7&l,l-=7&l;l<32;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}if((65535&u)!=(u>>>16^65535)){e.msg="invalid stored block lengths",r.mode=30;break}if(r.length=65535&u,l=u=0,r.mode=15,6===t)break e;case 15:r.mode=16;case 16:if(d=r.length){if(o<d&&(d=o),h<d&&(d=h),0===d)break e;I.arraySet(i,n,s,d,a),o-=d,s+=d,h-=d,a+=d,r.length-=d;break}r.mode=12;break;case 17:for(;l<14;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}if(r.nlen=257+(31&u),u>>>=5,l-=5,r.ndist=1+(31&u),u>>>=5,l-=5,r.ncode=4+(15&u),u>>>=4,l-=4,286<r.nlen||30<r.ndist){e.msg="too many length or distance symbols",r.mode=30;break}r.have=0,r.mode=18;case 18:for(;r.have<r.ncode;){for(;l<3;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}r.lens[A[r.have++]]=7&u,u>>>=3,l-=3}for(;r.have<19;)r.lens[A[r.have++]]=0;if(r.lencode=r.lendyn,r.lenbits=7,S={bits:r.lenbits},x=T(0,r.lens,0,19,r.lencode,0,r.work,S),r.lenbits=S.bits,x){e.msg="invalid code lengths set",r.mode=30;break}r.have=0,r.mode=19;case 19:for(;r.have<r.nlen+r.ndist;){for(;g=(C=r.lencode[u&(1<<r.lenbits)-1])>>>16&255,b=65535&C,!((_=C>>>24)<=l);){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}if(b<16)u>>>=_,l-=_,r.lens[r.have++]=b;else{if(16===b){for(z=_+2;l<z;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}if(u>>>=_,l-=_,0===r.have){e.msg="invalid bit length repeat",r.mode=30;break}k=r.lens[r.have-1],d=3+(3&u),u>>>=2,l-=2}else if(17===b){for(z=_+3;l<z;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}l-=_,k=0,d=3+(7&(u>>>=_)),u>>>=3,l-=3}else{for(z=_+7;l<z;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}l-=_,k=0,d=11+(127&(u>>>=_)),u>>>=7,l-=7}if(r.have+d>r.nlen+r.ndist){e.msg="invalid bit length repeat",r.mode=30;break}for(;d--;)r.lens[r.have++]=k}}if(30===r.mode)break;if(0===r.lens[256]){e.msg="invalid code -- missing end-of-block",r.mode=30;break}if(r.lenbits=9,S={bits:r.lenbits},x=T(D,r.lens,0,r.nlen,r.lencode,0,r.work,S),r.lenbits=S.bits,x){e.msg="invalid literal/lengths set",r.mode=30;break}if(r.distbits=6,r.distcode=r.distdyn,S={bits:r.distbits},x=T(F,r.lens,r.nlen,r.ndist,r.distcode,0,r.work,S),r.distbits=S.bits,x){e.msg="invalid distances set",r.mode=30;break}if(r.mode=20,6===t)break e;case 20:r.mode=21;case 21:if(6<=o&&258<=h){e.next_out=a,e.avail_out=h,e.next_in=s,e.avail_in=o,r.hold=u,r.bits=l,R(e,c),a=e.next_out,i=e.output,h=e.avail_out,s=e.next_in,n=e.input,o=e.avail_in,u=r.hold,l=r.bits,12===r.mode&&(r.back=-1);break}for(r.back=0;g=(C=r.lencode[u&(1<<r.lenbits)-1])>>>16&255,b=65535&C,!((_=C>>>24)<=l);){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}if(g&&0==(240&g)){for(v=_,y=g,w=b;g=(C=r.lencode[w+((u&(1<<v+y)-1)>>v)])>>>16&255,b=65535&C,!(v+(_=C>>>24)<=l);){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}u>>>=v,l-=v,r.back+=v}if(u>>>=_,l-=_,r.back+=_,r.length=b,0===g){r.mode=26;break}if(32&g){r.back=-1,r.mode=12;break}if(64&g){e.msg="invalid literal/length code",r.mode=30;break}r.extra=15&g,r.mode=22;case 22:if(r.extra){for(z=r.extra;l<z;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}r.length+=u&(1<<r.extra)-1,u>>>=r.extra,l-=r.extra,r.back+=r.extra}r.was=r.length,r.mode=23;case 23:for(;g=(C=r.distcode[u&(1<<r.distbits)-1])>>>16&255,b=65535&C,!((_=C>>>24)<=l);){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}if(0==(240&g)){for(v=_,y=g,w=b;g=(C=r.distcode[w+((u&(1<<v+y)-1)>>v)])>>>16&255,b=65535&C,!(v+(_=C>>>24)<=l);){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}u>>>=v,l-=v,r.back+=v}if(u>>>=_,l-=_,r.back+=_,64&g){e.msg="invalid distance code",r.mode=30;break}r.offset=b,r.extra=15&g,r.mode=24;case 24:if(r.extra){for(z=r.extra;l<z;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}r.offset+=u&(1<<r.extra)-1,u>>>=r.extra,l-=r.extra,r.back+=r.extra}if(r.offset>r.dmax){e.msg="invalid distance too far back",r.mode=30;break}r.mode=25;case 25:if(0===h)break e;if(d=c-h,r.offset>d){if((d=r.offset-d)>r.whave&&r.sane){e.msg="invalid distance too far back",r.mode=30;break}p=d>r.wnext?(d-=r.wnext,r.wsize-d):r.wnext-d,d>r.length&&(d=r.length),m=r.window}else m=i,p=a-r.offset,d=r.length;for(h<d&&(d=h),h-=d,r.length-=d;i[a++]=m[p++],--d;);0===r.length&&(r.mode=21);break;case 26:if(0===h)break e;i[a++]=r.length,h--,r.mode=21;break;case 27:if(r.wrap){for(;l<32;){if(0===o)break e;o--,u|=n[s++]<<l,l+=8}if(c-=h,e.total_out+=c,r.total+=c,c&&(e.adler=r.check=r.flags?B(r.check,i,c,a-c):O(r.check,i,c,a-c)),c=h,(r.flags?u:L(u))!==r.check){e.msg="incorrect data check",r.mode=30;break}l=u=0}r.mode=28;case 28:if(r.wrap&&r.flags){for(;l<32;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8}if(u!==(4294967295&r.total)){e.msg="incorrect length check",r.mode=30;break}l=u=0}r.mode=29;case 29:x=1;break e;case 30:x=-3;break e;case 31:return-4;case 32:default:return U}return e.next_out=a,e.avail_out=h,e.next_in=s,e.avail_in=o,r.hold=u,r.bits=l,(r.wsize||c!==e.avail_out&&r.mode<30&&(r.mode<27||4!==t))&&Z(e,e.output,e.next_out,c-e.avail_out)?(r.mode=31,-4):(f-=e.avail_in,c-=e.avail_out,e.total_in+=f,e.total_out+=c,r.total+=c,r.wrap&&c&&(e.adler=r.check=r.flags?B(r.check,i,c,e.next_out-c):O(r.check,i,c,e.next_out-c)),e.data_type=r.bits+(r.last?64:0)+(12===r.mode?128:0)+(20===r.mode||15===r.mode?256:0),(0==f&&0===c||4===t)&&x===N&&(x=-5),x)},r.inflateEnd=function(e){if(!e||!e.state)return U;var t=e.state;return t.window&&(t.window=null),e.state=null,N},r.inflateGetHeader=function(e,t){var r;return e&&e.state?0==(2&(r=e.state).wrap)?U:((r.head=t).done=!1,N):U},r.inflateSetDictionary=function(e,t){var r,n=t.length;return e&&e.state?0!==(r=e.state).wrap&&11!==r.mode?U:11===r.mode&&O(1,t,n,0)!==r.check?-3:Z(e,t,n,n)?(r.mode=31,-4):(r.havedict=1,N):U},r.inflateInfo="pako inflate (from Nodeca project)"},{"../utils/common":41,"./adler32":43,"./crc32":45,"./inffast":48,"./inftrees":50}],50:[function(e,t,r){"use strict";var D=e("../utils/common"),F=[3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,43,51,59,67,83,99,115,131,163,195,227,258,0,0],N=[16,16,16,16,16,16,16,16,17,17,17,17,18,18,18,18,19,19,19,19,20,20,20,20,21,21,21,21,16,72,78],U=[1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0],P=[16,16,16,16,17,17,18,18,19,19,20,20,21,21,22,22,23,23,24,24,25,25,26,26,27,27,28,28,29,29,64,64];t.exports=function(e,t,r,n,i,s,a,o){var h,u,l,f,c,d,p,m,_,g=o.bits,b=0,v=0,y=0,w=0,k=0,x=0,S=0,z=0,C=0,E=0,A=null,I=0,O=new D.Buf16(16),B=new D.Buf16(16),R=null,T=0;for(b=0;b<=15;b++)O[b]=0;for(v=0;v<n;v++)O[t[r+v]]++;for(k=g,w=15;1<=w&&0===O[w];w--);if(w<k&&(k=w),0===w)return i[s++]=20971520,i[s++]=20971520,o.bits=1,0;for(y=1;y<w&&0===O[y];y++);for(k<y&&(k=y),b=z=1;b<=15;b++)if(z<<=1,(z-=O[b])<0)return-1;if(0<z&&(0===e||1!==w))return-1;for(B[1]=0,b=1;b<15;b++)B[b+1]=B[b]+O[b];for(v=0;v<n;v++)0!==t[r+v]&&(a[B[t[r+v]]++]=v);if(d=0===e?(A=R=a,19):1===e?(A=F,I-=257,R=N,T-=257,256):(A=U,R=P,-1),b=y,c=s,S=v=E=0,l=-1,f=(C=1<<(x=k))-1,1===e&&852<C||2===e&&592<C)return 1;for(;;){for(p=b-S,_=a[v]<d?(m=0,a[v]):a[v]>d?(m=R[T+a[v]],A[I+a[v]]):(m=96,0),h=1<<b-S,y=u=1<<x;i[c+(E>>S)+(u-=h)]=p<<24|m<<16|_|0,0!==u;);for(h=1<<b-1;E&h;)h>>=1;if(0!==h?(E&=h-1,E+=h):E=0,v++,0==--O[b]){if(b===w)break;b=t[r+a[v]]}if(k<b&&(E&f)!==l){for(0===S&&(S=k),c+=y,z=1<<(x=b-S);x+S<w&&!((z-=O[x+S])<=0);)x++,z<<=1;if(C+=1<<x,1===e&&852<C||2===e&&592<C)return 1;i[l=E&f]=k<<24|x<<16|c-s|0}}return 0!==E&&(i[c+E]=b-S<<24|64<<16|0),o.bits=k,0}},{"../utils/common":41}],51:[function(e,t,r){"use strict";t.exports={2:"need dictionary",1:"stream end",0:"","-1":"file error","-2":"stream error","-3":"data error","-4":"insufficient memory","-5":"buffer error","-6":"incompatible version"}},{}],52:[function(e,t,r){"use strict";var i=e("../utils/common"),o=0,h=1;function n(e){for(var t=e.length;0<=--t;)e[t]=0}var s=0,a=29,u=256,l=u+1+a,f=30,c=19,_=2*l+1,g=15,d=16,p=7,m=256,b=16,v=17,y=18,w=[0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0],k=[0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13],x=[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7],S=[16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15],z=new Array(2*(l+2));n(z);var C=new Array(2*f);n(C);var E=new Array(512);n(E);var A=new Array(256);n(A);var I=new Array(a);n(I);var O,B,R,T=new Array(f);function D(e,t,r,n,i){this.static_tree=e,this.extra_bits=t,this.extra_base=r,this.elems=n,this.max_length=i,this.has_stree=e&&e.length}function F(e,t){this.dyn_tree=e,this.max_code=0,this.stat_desc=t}function N(e){return e<256?E[e]:E[256+(e>>>7)]}function U(e,t){e.pending_buf[e.pending++]=255&t,e.pending_buf[e.pending++]=t>>>8&255}function P(e,t,r){e.bi_valid>d-r?(e.bi_buf|=t<<e.bi_valid&65535,U(e,e.bi_buf),e.bi_buf=t>>d-e.bi_valid,e.bi_valid+=r-d):(e.bi_buf|=t<<e.bi_valid&65535,e.bi_valid+=r)}function L(e,t,r){P(e,r[2*t],r[2*t+1])}function j(e,t){for(var r=0;r|=1&e,e>>>=1,r<<=1,0<--t;);return r>>>1}function Z(e,t,r){var n,i,s=new Array(g+1),a=0;for(n=1;n<=g;n++)s[n]=a=a+r[n-1]<<1;for(i=0;i<=t;i++){var o=e[2*i+1];0!==o&&(e[2*i]=j(s[o]++,o))}}function W(e){var t;for(t=0;t<l;t++)e.dyn_ltree[2*t]=0;for(t=0;t<f;t++)e.dyn_dtree[2*t]=0;for(t=0;t<c;t++)e.bl_tree[2*t]=0;e.dyn_ltree[2*m]=1,e.opt_len=e.static_len=0,e.last_lit=e.matches=0}function 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r,n,i,s=t.dyn_tree,a=t.stat_desc.static_tree,o=t.stat_desc.has_stree,h=t.stat_desc.elems,u=-1;for(e.heap_len=0,e.heap_max=_,r=0;r<h;r++)0!==s[2*r]?(e.heap[++e.heap_len]=u=r,e.depth[r]=0):s[2*r+1]=0;for(;e.heap_len<2;)s[2*(i=e.heap[++e.heap_len]=u<2?++u:0)]=1,e.depth[i]=0,e.opt_len--,o&&(e.static_len-=a[2*i+1]);for(t.max_code=u,r=e.heap_len>>1;1<=r;r--)G(e,s,r);for(i=h;r=e.heap[1],e.heap[1]=e.heap[e.heap_len--],G(e,s,1),n=e.heap[1],e.heap[--e.heap_max]=r,e.heap[--e.heap_max]=n,s[2*i]=s[2*r]+s[2*n],e.depth[i]=(e.depth[r]>=e.depth[n]?e.depth[r]:e.depth[n])+1,s[2*r+1]=s[2*n+1]=i,e.heap[1]=i++,G(e,s,1),2<=e.heap_len;);e.heap[--e.heap_max]=e.heap[1],function(e,t){var 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// --- src/utils/constants.js ---
// =============================================================================
// Chat Archive — Constants & Shared Utilities
// =============================================================================

// --- Execution Limits (Anti-Runaway Circuit Breakers) ---
const SAFETY_LIMITS = {
  MAX_TURNS: 500,
  MAX_SCROLL_ITERATIONS: 100,
  MAX_EXTRACTION_TIME_MS: 120_000,      // Raised from 60s — long conversations are a primary use case
  MAX_CLIPBOARD_WAIT_MS: 2_000,
  MAX_SINGLE_TURN_SIZE: 100_000,
  SCROLL_STABILITY_THRESHOLD: 3,
  CLIPBOARD_READ_DELAY_MS: 100,         // Reduced from 175ms — saves ~4.5s on a 60-turn conversation
  SCROLL_STEP_DELAY_MS: 150,            // Reduced from 300ms — halves scroll phase duration
  HOVER_SETTLE_MS: 50,
  // Artifact extraction — v0.3.0
  MAX_ARTIFACT_PANELS: 50,
  PANEL_OPEN_TIMEOUT_MS: 5_000,         // Waits 5-seconds to detect the panel after clicking the artifact button
  PANEL_CLOSE_DELAY_MS: 100,
  MAX_ARTIFACT_CONTENT_SIZE: 500_000,
  // Binary artifact extraction — v0.4.0
  BINARY_INTERCEPT_TIMEOUT_MS: 5_000,   // max wait for background to relay intercepted URL
  BINARY_FETCH_MAX_SIZE: 50_000_000,    // 50MB hard cap on binary fetch (PPTX/DOCX/XLSX)
};

const SCHEMA_VERSION = '1.1';           // Bumped from 1.0 in v0.3.0
const EXTENSION_VERSION = '0.5.0';     // Bumped from 0.4.0 — in-extension updates

// --- JSZip Integrity Pin — v0.3.0 ---
// SHA-256 of src/vendor/jszip.min.js v3.10.1, verified at build time by build.sh.
// Not checked at runtime (file is local, not fetched).
// Update procedure: replace jszip.min.js → shasum -a 256 → update sha256 here → rebuild.
const JSZIP_INTEGRITY = {
  filename: 'jszip.min.js',
  sha256: 'acc7e41455a80765b5fd9c7ee1b8078a6d160bbbca455aeae854de65c947d59e',
  version: '3.10.1',
};

// --- Platform Detection ---
function detectPlatform() {
  const host = window.location.hostname;
  const path = window.location.pathname;

  if (host === 'claude.ai') return 'claude';
  if (host === 'chatgpt.com' || host === 'chat.openai.com') return 'chatgpt';
  if (host === 'gemini.google.com') return 'gemini';
  if (host === 'grok.com') return 'grok';
  if (host === 'x.com' && path.startsWith('/i/grok')) return 'grok-x';
  return null;
}

function platformToDisplayName(platform) {
  const names = {
    claude: 'claude.ai',
    chatgpt: 'chatgpt.com',
    gemini: 'gemini.google.com',
    grok: 'grok.com',
    'grok-x': 'x.com/i/grok',
  };
  return names[platform] || platform;
}

// --- Shared DOM Utilities ---

function wait(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

/**
 * Test if clipboard read access is available.
 * Some browsers block navigator.clipboard.readText() in extension contexts.
 */
async function testClipboardAccess() {
  try {
    await navigator.clipboard.readText();
    return true;
  } catch {
    return false;
  }
}

/**
 * Fuzzy button finder — resilient to selector changes.
 * Searches by aria-label, title, data-testid, and tooltip text.
 */
function findActionButton(container, intent) {
  // intent: 'copy', 'edit', 'copy text', 'copy prompt', etc.
  const intents = Array.isArray(intent) ? intent : [intent];

  for (const label of intents) {
    const strategies = [
      // Strategy 1: exact aria-label (most stable — user-facing)
      () => container.querySelector(`button[aria-label="${label}"]`),
      // Strategy 2: case-insensitive aria-label contains
      () => container.querySelector(`button[aria-label*="${label}" i]`),
      // Strategy 3: data-testid containing intent
      () => container.querySelector(`button[data-testid*="${label.toLowerCase().replace(/\s+/g, '-')}"]`),
      // Strategy 4: title attribute
      () => container.querySelector(`button[title*="${label}" i]`),
      // Strategy 5: mattooltip (Angular Material)
      () => container.querySelector(`button[mattooltip*="${label}" i]`),
    ];

    for (const strategy of strategies) {
      try {
        const result = strategy();
        if (result) return result;
      } catch {
        // Selector syntax error — skip
      }
    }
  }
  return null;
}

/**
 * Click a copy button and read the resulting clipboard content.
 * Returns the clipboard text, or null on failure.
 */
async function clickCopyAndRead(button) {
  if (!button) return null;

  try {
    // Snapshot current clipboard to detect change
    let previous = '';
    try {
      previous = await navigator.clipboard.readText();
    } catch {
      // Clipboard empty or inaccessible — ok, we'll still try
    }

    button.click();
    await wait(SAFETY_LIMITS.CLIPBOARD_READ_DELAY_MS);

    const content = await navigator.clipboard.readText();

    // Verify we got something (and ideally something different)
    if (content && content.length > 0) {
      return content;
    }
    return null;
  } catch {
    return null;
  }
}

/**
 * Scroll a container to load all lazy-loaded content.
 * Returns the number of scroll iterations performed.
 */
async function scrollToLoadAll(scrollContainer, countSelector, startTime) {
  let previousCount = 0;
  let stableIterations = 0;
  let scrollIterations = 0;

  scrollContainer.scrollTop = 0;
  await wait(500);

  while (
    stableIterations < SAFETY_LIMITS.SCROLL_STABILITY_THRESHOLD &&
    scrollIterations < SAFETY_LIMITS.MAX_SCROLL_ITERATIONS
  ) {
    if (startTime && Date.now() - startTime > SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS) break;

    const currentElements = document.querySelectorAll(countSelector);
    if (currentElements.length === previousCount) {
      stableIterations++;
    } else {
      stableIterations = 0;
      previousCount = currentElements.length;
    }

    scrollContainer.scrollBy(0, scrollContainer.clientHeight * 0.8);
    await wait(SAFETY_LIMITS.SCROLL_STEP_DELAY_MS);
    scrollIterations++;
  }

  // Scroll back to top for clean state
  scrollContainer.scrollTop = 0;
  await wait(200);

  console.log(`[Chat Archive] Scroll complete: ${previousCount} elements after ${scrollIterations} scrolls`);
  return scrollIterations;
}

/**
 * Find the scrollable ancestor of a given element.
 */
function findScrollableAncestor(element) {
  let parent = element.parentElement;
  while (parent) {
    const style = window.getComputedStyle(parent);
    if (style.overflowY === 'scroll' || style.overflowY === 'auto') {
      return parent;
    }
    parent = parent.parentElement;
  }
  return null;
}

/**
 * Flag a turn for size if needed, mutates the turn object.
 */
function flagIfOversized(turn) {
  if (turn.content && turn.content.length > SAFETY_LIMITS.MAX_SINGLE_TURN_SIZE) {
    turn.flagged = true;
    turn.flagReason = 'Content exceeds 100KB';
  }
  return turn;
}

// --- Artifact Utilities — v0.3.0 ---

/**
 * Poll for an element matching selector until found or timeoutMs elapses.
 * Resolves with the element; rejects with an Error on timeout.
 *
 * Used by artifact-panel.js to wait for the artifact panel to render before
 * attempting content extraction.
 */
function waitForElement(selector, timeoutMs) {
  return new Promise((resolve, reject) => {
    const existing = document.querySelector(selector);
    if (existing) {
      resolve(existing);
      return;
    }

    const deadline = Date.now() + timeoutMs;
    const interval = setInterval(() => {
      const el = document.querySelector(selector);
      if (el) {
        clearInterval(interval);
        resolve(el);
      } else if (Date.now() >= deadline) {
        clearInterval(interval);
        reject(
          new Error(
            `[Chat Archive] waitForElement: "${selector}" not found within ${timeoutMs}ms`
          )
        );
      }
    }, 50);
  });
}

/**
 * Compute SHA-256 of a UTF-8 string, returning lowercase hex.
 *
 * Used by artifact-code.js to produce content_hash for each artifact version,
 * which drives deduplication and the `changed` flag in the manifest.
 */
async function computeSHA256(str) {
  const data = new TextEncoder().encode(str);
  const hashBuffer = await crypto.subtle.digest('SHA-256', data);
  return Array.from(new Uint8Array(hashBuffer))
    .map((b) => b.toString(16).padStart(2, '0'))
    .join('');
}

/**
 * Compute SHA-256 of a Uint8Array (binary content), returning lowercase hex.
 * Used by artifact-code.js for binary artifact version deduplication.
 *
 * @param {Uint8Array} uint8Array - Binary content
 * @returns {Promise<string>} - Lowercase hex SHA-256
 */
async function computeSHA256Binary(uint8Array) {
  const hashBuffer = await crypto.subtle.digest('SHA-256', uint8Array);
  return Array.from(new Uint8Array(hashBuffer))
    .map((b) => b.toString(16).padStart(2, '0'))
    .join('');
}

// --- src/extractors/artifacts/artifact-types.js ---
// =============================================================================
// Chat Archive — Artifact Type Mapping
// =============================================================================
// Maps DOM type labels (as shown in Claude's artifact cards and panel headers)
// to canonical type identifiers and file extensions.
//
// Two surfaces need mapping:
//   - Artifact cards:  raw label from div.text-xs.line-clamp-1.text-text-400
//                      e.g. "SH", "Code · HTML", "Image · SVG"
//   - Inline code blocks: language string from div.text-text-500.font-small
//                          e.g. "bash", "python", "javascript"
//
// Unknown labels degrade gracefully to { canonical: 'unknown', ext: '.txt' }
// with type_unknown: true in the ProcessedArtifact — no extraction failure.
// =============================================================================

// --- Artifact Card Type Labels ---
// Keys are the exact strings rendered in Claude's type label element.
// Values must remain in sync with artifact-code.js per-type handlers.
const TYPE_MAP = {
  // Shell / scripting
  'SH':            { canonical: 'shell',      ext: '.sh'   },
  // Python
  'PY':            { canonical: 'python',     ext: '.py'   },
  // JavaScript variants
  'JS':            { canonical: 'javascript', ext: '.js'   },
  'Code · JS':     { canonical: 'javascript', ext: '.js'   },
  'Code · React':  { canonical: 'jsx',        ext: '.jsx'  },
  // TypeScript variants
  'TS':            { canonical: 'typescript', ext: '.ts'   },
  'Code · TS':     { canonical: 'typescript', ext: '.ts'   },
  'Code · TSX':    { canonical: 'tsx',        ext: '.tsx'  },
  // Web
  'Code · HTML':   { canonical: 'html',       ext: '.html' },
  'CSS':           { canonical: 'css',        ext: '.css'  },
  'Code · CSS':    { canonical: 'css',        ext: '.css'  },
  // Image
  'Image · SVG':   { canonical: 'svg',        ext: '.svg'  },
  // Data / config
  'JSON':          { canonical: 'json',       ext: '.json' },
  'YAML':          { canonical: 'yaml',       ext: '.yaml' },
  'SQL':           { canonical: 'sql',        ext: '.sql'  },
  // Document
  'MD':            { canonical: 'markdown',   ext: '.md'   },
  // Text (plain artifact with no specific type)
  'TXT':           { canonical: 'text',       ext: '.txt'  },
  // Office / binary document formats
  // Card label format confirmed from DOM inspection (Jun 2026):
  //   "Presentation · PPTX\u00a0" — rendered by type label div + &nbsp; suffix.
  //   resolveType() normalises \u00a0 before lookup (see below).
  // Panel header h2 may show abbreviated form — both forms listed as fallback.
  'Presentation · PPTX': { canonical: 'pptx', ext: '.pptx' },
  'Document · DOCX':     { canonical: 'docx', ext: '.docx' },
  'Spreadsheet · XLSX':  { canonical: 'xlsx', ext: '.xlsx' },
  // Abbreviated panel-header fallbacks
  'PPTX':                { canonical: 'pptx', ext: '.pptx' },
  'DOCX':                { canonical: 'docx', ext: '.docx' },
  'XLSX':                { canonical: 'xlsx', ext: '.xlsx' },
};

// Fallback for labels not in TYPE_MAP.
// Preserves content and signals the metadata gap without failing extraction.
const UNKNOWN_TYPE = { canonical: 'unknown', ext: '.txt' };

/**
 * Resolve a raw DOM type label to a canonical type descriptor.
 *
 * Normalisation applied before lookup:
 *   1. Replace \u00a0 (&nbsp;) with regular space — Claude's type label div ends
 *      with &nbsp; which innerText renders as \u00a0, and String.trim() does NOT
 *      strip it. Without this step, "Presentation · PPTX\u00a0" misses the map.
 *   2. Collapse multiple spaces to one (defensive, handles span-injected whitespace).
 *   3. Trim leading/trailing whitespace.
 *
 * @param {string} rawLabel - Type label string from the DOM
 * @returns {{ canonical: string, ext: string }}
 */
function resolveType(rawLabel) {
  const normalized = rawLabel
    .replace(/\u00a0/g, ' ')  // &nbsp; → regular space
    .replace(/\s+/g, ' ')     // collapse any multi-space runs
    .trim();
  return TYPE_MAP[normalized] ?? UNKNOWN_TYPE;
}

// --- Inline Code Block Language Strings ---
// Keys are the language identifier strings from Claude's inline code block
// language label (div.text-text-500.font-small). Maps to canonical type names
// matching the values used in TYPE_MAP above.
const LANG_MAP = {
  // Shell
  'bash':       'shell',
  'sh':         'shell',
  'shell':      'shell',
  'zsh':        'shell',
  // Python
  'python':     'python',
  'py':         'python',
  'python3':    'python',
  // JavaScript
  'javascript': 'javascript',
  'js':         'javascript',
  'node':       'javascript',
  // TypeScript
  'typescript': 'typescript',
  'ts':         'typescript',
  // React / JSX
  'jsx':        'jsx',
  'tsx':        'tsx',
  // Web
  'html':       'html',
  'css':        'css',
  // Image
  'svg':        'svg',
  // Data / config
  'json':       'json',
  'yaml':       'yaml',
  'yml':        'yaml',
  'sql':        'sql',
  'toml':       'toml',
  'xml':        'xml',
  // Document
  'markdown':   'markdown',
  'md':         'markdown',
  // Systems / compiled
  'c':          'c',
  'cpp':        'cpp',
  'c++':        'cpp',
  'rust':       'rust',
  'go':         'go',
  'java':       'java',
  'kotlin':     'kotlin',
  'swift':      'swift',
  'ruby':       'ruby',
  'rb':         'ruby',
  'php':        'php',
  'r':          'r',
  // Infra / scripting
  'dockerfile': 'dockerfile',
  'makefile':   'makefile',
  'terraform':  'terraform',
  'hcl':        'terraform',
  'powershell': 'powershell',
  'ps1':        'powershell',
  // Plain text (explicit)
  'text':       'text',
  'txt':        'text',
  'plaintext':  'text',
  'plain':      'text',
};

/**
 * Map an inline code block language string to a canonical type name.
 * Returns 'unknown' for unrecognised language strings.
 *
 * @param {string} lang - Language string from the code block label
 * @returns {string} canonical type name
 */
function resolveCodeBlockLang(lang) {
  return LANG_MAP[lang.toLowerCase().trim()] ?? 'unknown';
}

/**
 * Derive a file extension from a canonical type name.
 * Used for inline code blocks where we have a canonical type but no TYPE_MAP entry.
 *
 * @param {string} canonical - Canonical type name
 * @returns {string} File extension including leading dot, e.g. '.py'
 */
function extForCanonical(canonical) {
  const EXT_MAP = {
    shell:        '.sh',
    python:       '.py',
    javascript:   '.js',
    typescript:   '.ts',
    jsx:          '.jsx',
    tsx:          '.tsx',
    html:         '.html',
    css:          '.css',
    svg:          '.svg',
    json:         '.json',
    yaml:         '.yaml',
    sql:          '.sql',
    toml:         '.toml',
    xml:          '.xml',
    markdown:     '.md',
    text:         '.txt',
    c:            '.c',
    cpp:          '.cpp',
    rust:         '.rs',
    go:           '.go',
    java:         '.java',
    kotlin:       '.kt',
    swift:        '.swift',
    ruby:         '.rb',
    php:          '.php',
    r:            '.r',
    dockerfile:   '.dockerfile',
    makefile:     '.makefile',
    terraform:    '.tf',
    powershell:   '.ps1',
  };
  return EXT_MAP[canonical] ?? '.txt';
}

// --- src/extractors/artifacts/artifact-code.js ---
// =============================================================================
// Chat Archive — Artifact Content Processor
// =============================================================================
// Post-processes raw artifact content by canonical type:
//   - Computes SHA-256 content_hash (for dedup and `changed` flag in manifest)
//   - Validates content structure (malformed flag)
//   - Extracts supplementary type-specific metadata
//   - Flags oversized content
//
// Entry point: processArtifact(content, candidate, method)
//
// Also exports: slugify(title)
//   Used by manifest assembly in claude.js to build sidecar filenames.
//   Lives here because it operates on artifact titles, not turn content.
//
// Dependencies (all injected via build concatenation order):
//   constants.js    — SAFETY_LIMITS, computeSHA256()
//   artifact-types.js — (canonical type names referenced as string constants)
// =============================================================================

/**
 * Process raw artifact content into a structured result.
 * Called once per artifact per turn, for both card and code_block surfaces.
 *
 * @param {string|null}       content   - Raw string from extraction; null if extraction failed
 * @param {ArtifactCandidate} candidate - Descriptor from artifact-detector.js
 * @param {string}            method    - 'clipboard'|'dom_walk'|'inline_clipboard'|'inline_direct'|'failed'
 * @returns {Promise<ProcessedArtifact>}
 */
async function processArtifact(content, candidate, method) {
  // --- Binary fetch: content is Uint8Array ---
  // Returned by attemptBinaryExtraction when the binary panel download was
  // intercepted, fetched, and fits within BINARY_FETCH_MAX_SIZE.
  if (method === 'binary_fetch' && content instanceof Uint8Array) {
    const byteCount  = content.byteLength;
    const oversized  = byteCount > SAFETY_LIMITS.BINARY_FETCH_MAX_SIZE;
    const content_hash = await computeSHA256Binary(content);
    return {
      title:             candidate.title,
      canonical_type:    candidate.canonicalType,
      extension:         candidate.extension,
      surface:           candidate.surface,
      content,           // Uint8Array — added to zip as binary in claude.js
      content_hash,
      byte_count:        byteCount,
      char_count:        0,
      line_count:        0,
      extraction_method: 'binary_fetch',
      malformed:         false,
      type_unknown:      candidate.canonicalType === 'unknown',
      oversized,
      supplementary:     {},
    };
  }

  // --- Browser download fallback: content is null ---
  // Returned by attemptBinaryExtraction when interception or fetch failed.
  // The file landed (or should have landed) in the user's Downloads folder.
  // claude.js must NOT create a sidecar for this; serializer generates a readme entry.
  if (method === 'browser_download') {
    const expectedFilename =
      (content?.expected_filename) ||
      (candidate.title.replace(/[<>:"/\\|?*]/g, '_') + candidate.extension);
    return {
      title:             candidate.title,
      canonical_type:    candidate.canonicalType,
      extension:         candidate.extension,
      surface:           candidate.surface,
      content:           null,
      content_hash:      '',
      byte_count:        null,
      char_count:        0,
      line_count:        0,
      extraction_method: 'browser_download',
      expected_filename: expectedFilename,
      malformed:         false,
      type_unknown:      candidate.canonicalType === 'unknown',
      oversized:         false,
      supplementary:     {},
    };
  }

  // --- Text content (all other methods) ---
  const safeContent = (content ?? '').trim();
  const canonical   = candidate.canonicalType;
  const oversized   = safeContent.length > SAFETY_LIMITS.MAX_ARTIFACT_CONTENT_SIZE;
  const type_unknown = canonical === 'unknown';

  // Per-type post-processing (validation + supplementary metadata)
  let malformed    = false;
  let supplementary = {};

  if (safeContent.length > 0 && !type_unknown) {
    const result  = runTypeHandler(safeContent, canonical);
    malformed     = result.malformed;
    supplementary = result.supplementary;
  }

  // SHA-256 content hash — empty string when content is absent
  const content_hash = safeContent.length > 0
    ? await computeSHA256(safeContent)
    : '';

  if (type_unknown && safeContent.length > 0) {
    console.warn(
      `[Chat Archive] Unknown artifact type label: "${candidate.typeLabel}" — content saved as .txt`
    );
  }

  if (method === 'failed') {
    console.warn(
      `[Chat Archive] Artifact extraction failed for "${candidate.title}" — empty content in manifest`
    );
  }

  return {
    title:             candidate.title,
    canonical_type:    canonical,
    extension:         candidate.extension,
    surface:           candidate.surface,
    content:           safeContent,
    content_hash,
    line_count:        safeContent.length > 0 ? safeContent.split('\n').length : 0,
    char_count:        safeContent.length,
    extraction_method: method,
    malformed,
    type_unknown,
    oversized,
    supplementary,
  };
}

// --- Per-Type Post-Processors ---
// All receive a non-empty content string.
// All return { malformed: boolean, supplementary: Object }.
// None may throw — parse errors set malformed: true and log a warning.

/**
 * Dispatch to the appropriate type handler.
 * Types not listed here are valid but need no post-processing.
 */
function runTypeHandler(content, canonical) {
  switch (canonical) {
    case 'html': return processHtml(content);
    case 'svg':  return processSvg(content);
    default:     return { malformed: false, supplementary: {} };
  }
}

/**
 * HTML handler.
 * Supplementary: page_title (from <title> tag, if present).
 * Malformed: content doesn't begin with <!DOCTYPE or <html (case-insensitive).
 * HTML fragments (e.g. a bare <div>) are flagged but still extracted.
 */
function processHtml(content) {
  const trimmed  = content.trimStart().toLowerCase();
  const malformed = !trimmed.startsWith('<!doctype') && !trimmed.startsWith('<html');

  if (malformed) {
    console.warn(
      '[Chat Archive] HTML artifact does not start with <!DOCTYPE or <html — flagged malformed'
    );
  }

  let page_title = null;
  try {
    const doc  = new DOMParser().parseFromString(content, 'text/html');
    page_title = doc.querySelector('title')?.textContent?.trim() || null;
  } catch {
    // DOMParser unavailable or threw — non-fatal, page_title stays null
  }

  return {
    malformed,
    supplementary: page_title ? { page_title } : {},
  };
}

/**
 * SVG handler.
 * Supplementary: viewBox, width, height from the root <svg> element.
 * Malformed: content doesn't contain '<svg'.
 */
function processSvg(content) {
  const malformed = !content.includes('<svg');

  if (malformed) {
    console.warn('[Chat Archive] SVG artifact does not contain <svg — flagged malformed');
  }

  const supplementary = {};

  if (!malformed) {
    try {
      const doc        = new DOMParser().parseFromString(content, 'image/svg+xml');
      const parseError = doc.querySelector('parsererror');

      if (!parseError) {
        const svgEl = doc.querySelector('svg');
        if (svgEl) {
          const viewBox = svgEl.getAttribute('viewBox');
          const width   = svgEl.getAttribute('width');
          const height  = svgEl.getAttribute('height');
          if (viewBox) supplementary.viewBox = viewBox;
          if (width)   supplementary.width   = width;
          if (height)  supplementary.height  = height;
        }
      }
    } catch {
      // DOMParser failure — non-fatal, supplementary stays empty
    }
  }

  return { malformed, supplementary };
}

// --- Slug Utility ---

/**
 * Generate a URL-safe slug from an artifact title for use in sidecar filenames.
 * Filename pattern:  artifact-{id}-v{version}-{slug}{extension}
 * Example:  artifact-001-v2-directory-listing.sh
 *
 * Rules:
 *   - Lowercase
 *   - Spaces → hyphens
 *   - Non-alphanumeric (except hyphens) → removed
 *   - Consecutive hyphens collapsed to one
 *   - Leading/trailing hyphens stripped
 *   - Capped at 40 characters, breaking at a hyphen where possible
 *   - Falls back to 'artifact' if title reduces to an empty string
 *
 * @param {string} title - Artifact title from DOM
 * @returns {string}     - URL-safe slug, 1–40 characters
 */
function slugify(title) {
  let slug = title
    .toLowerCase()
    .replace(/\s+/g, '-')
    .replace(/[^a-z0-9-]/g, '')
    .replace(/-{2,}/g, '-')
    .replace(/^-+|-+$/g, '');

  if (!slug) return 'artifact';
  if (slug.length <= 40) return slug;

  // Truncate at 40, preferring a word boundary (last hyphen past position 20)
  let truncated = slug.slice(0, 40);
  const lastHyphen = truncated.lastIndexOf('-');
  if (lastHyphen > 20) {
    truncated = truncated.slice(0, lastHyphen);
  }

  return truncated || 'artifact';
}

// --- src/extractors/artifacts/artifact-panel.js ---
// =============================================================================
// Chat Archive — Artifact Content Extraction
// =============================================================================
// Handles the two artifact content surfaces:
//
//   Surface A — Artifact panel (card artifacts from present_files):
//     extractFromPanel(candidate, hasClipboard)
//     Opens the panel, extracts via clipboard (Pass A) or DOM line walk (Pass B),
//     closes the panel. Panel close is in a finally block — always attempted.
//
//   Surface B — Inline code blocks (fenced code in assistant turn text):
//     extractInlineCodeBlock(candidate, hasClipboard)
//     Extracts via copy button (Pass A) or direct innerText read (Pass B).
//     No DOM side-effects — no open/close lifecycle.
//
// Dependencies (injected via build concatenation order):
//   constants.js — SAFETY_LIMITS, wait(), waitForElement()
// =============================================================================

// --- Surface A: Artifact Panel ---

/**
 * Open the artifact panel for a card-surface artifact, extract its content,
 * and close the panel. The close is always attempted regardless of whether
 * extraction succeeded, to avoid leaving the UI in a broken state.
 *
 * Pass A (primary):   Click the panel's Copy button → read clipboard.
 * Pass B (fallback):  Walk div[data-diff-line] elements, read code.innerText per line.
 *
 * @param {ArtifactCandidate} candidate     - Candidate from artifact-detector.js
 * @param {boolean}           hasClipboard  - Whether clipboard API is available
 * @returns {Promise<{ content: string|null, method: string }>}
 */
async function extractFromPanel(candidate, hasClipboard) {
  // Scroll the card into view before clicking — required for Claude's
  // React panel handler to fire. Cards scrolled out of viewport after
  // turn-loading don't respond to programmatic .click().
  candidate.viewButton.scrollIntoView({ behavior: 'instant', block: 'center' });
  await wait(SAFETY_LIMITS.HOVER_SETTLE_MS);  // 50ms — let layout settle
  candidate.viewButton.click();

  // 2a. Switch to Code view before waiting for content.
  // HTML/React artifacts default to Preview mode (live rendered component) which
  // does NOT render #wiggle-file-content. Code view always renders the source in
  // the file-viewer format. Switching here is safe for all types: for MD/code
  // artifacts it switches from prose preview to raw source (better quality).
  // We wait briefly for the segmented control to appear, then click "Code".
  try {
    await waitForElement(
      '[data-cds="SegmentedControl"][aria-label="File view mode"]',
      2000
    );
    const codeTab = document.querySelector(
      '[data-cds="SegmentedControl"][aria-label="File view mode"] [aria-label="Code"]'
    );
    if (codeTab) {
      codeTab.click();
      await wait(SAFETY_LIMITS.HOVER_SETTLE_MS);
    }
  } catch {
    // SegmentedControl absent.
    // Fast-fail: check immediately whether #wiggle-file-content is also absent.
    // If both are missing AND a Download button is present, this is a binary panel
    // (PPTX, DOCX, XLSX). Avoids burning the full PANEL_OPEN_TIMEOUT_MS (5s) waiting
    // for a file viewer that will never appear.
    const immediateFileViewer = document.querySelector('#wiggle-file-content');
    if (!immediateFileViewer) {
      const downloadBtn = document.querySelector('button[aria-label="Download"]');
      if (downloadBtn) {
        console.log(
          `[Chat Archive] Binary panel detected for "${candidate.title}" — attempting binary extraction`
        );

        // Type correction from panel h2 header when card label was unresolved.
        if (candidate.canonicalType === 'unknown') {
          const h2 = document.querySelector('h2[title]');
          if (h2) {
            const spans = h2.querySelectorAll('span.text-text-400');
            const panelTypeLabel = spans[spans.length - 1]?.innerText?.trim();
            if (panelTypeLabel) {
              const resolved = resolveType(panelTypeLabel);
              if (resolved.canonical !== 'unknown') {
                candidate.canonicalType = resolved.canonical;
                candidate.extension     = resolved.ext;
                candidate.typeLabel     = panelTypeLabel;
                console.log(
                  `[Chat Archive] Binary type resolved via panel header: ` +
                  `"${panelTypeLabel}" → ${resolved.canonical} for "${candidate.title}"`
                );
              }
            }
          }
        }

        // Attempt binary extraction; always close the panel afterwards.
        let binaryResult = { content: null, method: 'failed' };
        try {
          binaryResult = await attemptBinaryExtraction(downloadBtn, candidate);
        } catch (err) {
          console.warn(
            `[Chat Archive] attemptBinaryExtraction threw unexpectedly for "${candidate.title}":`,
            err.message
          );
        } finally {
          const backBtn = document.querySelector('button[aria-label="Go back"]');
          if (backBtn) {
            backBtn.click();
            await wait(SAFETY_LIMITS.PANEL_CLOSE_DELAY_MS);
          }
        }
        return binaryResult;
      }
    }
    // Not a binary panel (or Download button absent) — fall through.
    // #wiggle-file-content may still appear below for single-mode text artifacts.
  }

  // 2b. Wait for panel content to render.
  // #wiggle-file-content is the content container in Code view — present for all
  // artifact types once Code mode is active.
  let contentEl;
  try {
    contentEl = await waitForElement(
      '#wiggle-file-content',
      SAFETY_LIMITS.PANEL_OPEN_TIMEOUT_MS
    );
  } catch {
    console.warn(
      `[Chat Archive] Panel content did not render within ${SAFETY_LIMITS.PANEL_OPEN_TIMEOUT_MS}ms` +
      ` for artifact: "${candidate.title}"`
    );
    return { content: null, method: 'panel_timeout' };
  }
  // panel: the data-skill-file-viewer container, used for scoped Pass B queries
  const panel = contentEl.closest('[data-skill-file-viewer="true"]') || contentEl;

  // 3. Extract content — panel close always runs in finally
  let content = null;
  let method  = 'failed';

  try {
    // --- Pass A: Panel Copy button → clipboard ---
    if (hasClipboard) {
      try {
        // The Copy action lives in a SplitDropdownButton.
        // First child button is Copy; second opens the dropdown — do NOT click that.
        const splitBtn = document.querySelector(
          '[data-cds="SplitDropdownButton"][aria-label="More options"]'
        );
        const copyBtn = splitBtn?.querySelector('button:first-child');

        if (copyBtn && copyBtn.innerText.trim() === 'Copy') {
          copyBtn.click();
          await wait(SAFETY_LIMITS.CLIPBOARD_READ_DELAY_MS);
          const text = await navigator.clipboard.readText();

          if (text && text.trim().length > 0) {
            content = text;
            method  = 'clipboard';
          }
        }
      } catch (err) {
        console.warn(
          `[Chat Archive] Panel clipboard extraction failed for "${candidate.title}":`,
          err.message
        );
        // Fall through to Pass B
      }
    }

    // --- Pass B: DOM line walk ---
    // Walk div[data-diff-line] nodes in numeric order, read code.innerText per line.
    // Numeric sort is required — DOM order is not guaranteed to be sequential.
    if (!content) {
      const lineEls = panel.querySelectorAll('div[data-diff-line]');

      if (lineEls.length > 0) {
        const sorted = Array.from(lineEls).sort(
          (a, b) => parseInt(a.dataset.diffLine, 10) - parseInt(b.dataset.diffLine, 10)
        );
        // Each line element contains a <code> child with the line text.
        // Lines with no code child (e.g. blank lines) contribute an empty string.
        const joined = sorted
          .map((el) => el.querySelector('code')?.innerText ?? '')
          .join('\n');

        if (joined.trim().length > 0) {
          content = joined;
          method  = 'dom_walk';
        }
      }

      // --- Pass C: Prose fallback ---
      // MD and other document artifacts render in Preview mode as formatted prose,
      // not as data-diff-line code rows. contentEl IS #wiggle-file-content —
      // no second query needed; content is guaranteed rendered at this point.
      if (!content) {
        const text = contentEl.innerText?.trim();
        if (text && text.length > 0) {
          content = text;
          method  = 'dom_prose';
        }
      }

      if (!content) {
        console.warn(
          `[Chat Archive] All extraction passes failed for artifact "${candidate.title}"`
        );
      }
    }
    // --- Type correction from panel header ---
    // When the card's type label didn't resolve (type_unknown), the panel header
    // h2 is the authoritative source — Claude renders the canonical label there
    // (e.g. "MD", "SH") regardless of what the card's inner div showed.
    // Card type takes precedence: this only fires when the card gave 'unknown'.
    if (candidate.canonicalType === 'unknown') {
      // Panel h2 is a sibling container above data-skill-file-viewer; use
      // document.querySelector since only one panel h2 exists while open.
      const h2 = document.querySelector('h2[title]');
      if (h2) {
        const spans = h2.querySelectorAll('span.text-text-400');
        const panelTypeLabel = spans[spans.length - 1]?.innerText?.trim();
        if (panelTypeLabel) {
          const resolved = resolveType(panelTypeLabel);
          if (resolved.canonical !== 'unknown') {
            candidate.canonicalType = resolved.canonical;
            candidate.extension     = resolved.ext;
            candidate.typeLabel     = panelTypeLabel;
            console.log(
              `[Chat Archive] Type corrected via panel header: ` +
              `"${panelTypeLabel}" → ${resolved.canonical} for "${candidate.title}"`
            );
          }
        }
      }
    }

  } finally {
    // 4. Always close the panel — regardless of extraction outcome.
    // Unclosed panels block the next panel open and leave the UI broken.
    const backBtn = document.querySelector('button[aria-label="Go back"]');
    if (backBtn) {
      backBtn.click();
      await wait(SAFETY_LIMITS.PANEL_CLOSE_DELAY_MS);
    } else {
      console.warn(
        '[Chat Archive] "Go back" button not found — panel may remain open. ' +
        'User may need to close it manually.'
      );
    }
  }

  return { content, method };
}

// --- Binary Extraction ---

/**
 * Intercept a binary artifact's Download button click, fetch the bytes in-context
 * (session cookies included automatically), and return them as a Uint8Array for
 * inclusion in the JSZip archive.
 *
 * Flow:
 *   1. Tell background.js to arm the download interceptor (setupBinaryInterception).
 *   2. Register a one-time listener for the 'binaryUrlReady' relay message.
 *   3. Click the Download button → triggers chrome.downloads.onCreated in background.
 *   4. Background cancels the browser download, relays the URL here.
 *   5. fetch(url) → arrayBuffer() — same-origin to claude.ai, session cookies included.
 *   6. Return { content: Uint8Array, method: 'binary_fetch' }.
 *
 * Fallback (any step fails): { content: null, method: 'browser_download' }.
 * If the download was already cancelled by background before the failure, we re-click
 * the Download button so the file still lands in the user's Downloads folder.
 *
 * @param {HTMLElement}       downloadBtn - The Download button in the binary panel
 * @param {ArtifactCandidate} candidate   - Descriptor for logging and filename generation
 * @returns {Promise<{ content: Uint8Array|null, method: string, expected_filename?: string }>}
 */
async function attemptBinaryExtraction(downloadBtn, candidate) {
  const expectedFilename =
    candidate.title.replace(/[<>:"/\\|?*]/g, '_') + candidate.extension;

  // 1. Arm the background interceptor.
  const setupOk = await new Promise((resolve) => {
    chrome.runtime.sendMessage({ action: 'setupBinaryInterception' }, (response) => {
      if (chrome.runtime.lastError) {
        console.warn(
          '[Chat Archive] setupBinaryInterception messaging error:',
          chrome.runtime.lastError.message
        );
        resolve(false);
      } else {
        resolve(response?.success === true);
      }
    });
  });

  if (!setupOk) {
    console.warn(
      `[Chat Archive] Binary interception setup failed for "${candidate.title}" — ` +
      'falling back to native browser download'
    );
    downloadBtn.click(); // let the download proceed normally
    return { content: null, method: 'browser_download', expected_filename: expectedFilename };
  }

  // 2. Register URL relay listener, THEN click Download.
  // Listener registered before click — guarantees we cannot miss the event.
  let interceptedUrl = null;
  try {
    interceptedUrl = await new Promise((resolve, reject) => {
      const timeoutHandle = setTimeout(() => {
        chrome.runtime.onMessage.removeListener(urlListener);
        reject(new Error(
          `Timed out after ${SAFETY_LIMITS.BINARY_INTERCEPT_TIMEOUT_MS}ms ` +
          `waiting for intercepted URL`
        ));
      }, SAFETY_LIMITS.BINARY_INTERCEPT_TIMEOUT_MS);

      function urlListener(message) {
        if (message.action === 'binaryUrlReady') {
          clearTimeout(timeoutHandle);
          chrome.runtime.onMessage.removeListener(urlListener);
          resolve(message.url);
        }
        // Return undefined — don't keep the message channel open.
      }

      chrome.runtime.onMessage.addListener(urlListener);
      downloadBtn.click(); // triggers chrome.downloads.onCreated in background
    });
  } catch (err) {
    // Timeout — the original download click may have been intercepted and cancelled.
    // Cannot reliably re-trigger (panel may be closing). User can manually re-download.
    console.warn(
      `[Chat Archive] Binary interception failed for "${candidate.title}": ${err.message}`
    );
    return { content: null, method: 'browser_download', expected_filename: expectedFilename };
  }

  // 3. Fetch binary content from the intercepted URL.
  // Same-origin to claude.ai — browser sends session cookies automatically.
  try {
    console.log(
      `[Chat Archive] Fetching binary for "${candidate.title}": ${interceptedUrl}`
    );
    const fetchResponse = await fetch(interceptedUrl);
    if (!fetchResponse.ok) {
      throw new Error(`HTTP ${fetchResponse.status} ${fetchResponse.statusText}`);
    }

    const arrayBuffer = await fetchResponse.arrayBuffer();
    const byteCount   = arrayBuffer.byteLength;

    if (byteCount > SAFETY_LIMITS.BINARY_FETCH_MAX_SIZE) {
      throw new Error(
        `Artifact too large: ${(byteCount / 1_000_000).toFixed(1)}MB exceeds ` +
        `the ${SAFETY_LIMITS.BINARY_FETCH_MAX_SIZE / 1_000_000}MB limit`
      );
    }

    const uint8Array = new Uint8Array(arrayBuffer);
    console.log(
      `[Chat Archive] Binary fetch complete: ${byteCount} bytes for "${candidate.title}"`
    );
    return { content: uint8Array, method: 'binary_fetch' };

  } catch (err) {
    console.warn(
      `[Chat Archive] Binary fetch failed for "${candidate.title}": ${err.message}`
    );
    // Download was intercepted and cancelled by background. Re-trigger natively —
    // background's pendingInterception is already cleared (consumed by onCreated),
    // so this click goes through as a normal browser download.
    try { downloadBtn.click(); } catch { /* ignore if panel already closed */ }
    return { content: null, method: 'browser_download', expected_filename: expectedFilename };
  }
}

// --- Surface B: Inline Code Blocks ---

/**
 * Extract content from an inline markdown code block within an assistant turn.
 * These are fenced code blocks rendered as div[role="group"][aria-label="... code"].
 * No panel interaction — no open/close lifecycle.
 *
 * Pass A (primary):  Click the block's copy button → read clipboard.
 * Pass B (fallback): Read candidate.codeElement.innerText directly.
 *
 * @param {ArtifactCandidate} candidate     - Candidate from artifact-detector.js
 * @param {boolean}           hasClipboard  - Whether clipboard API is available
 * @returns {Promise<{ content: string|null, method: string }>}
 */
async function extractInlineCodeBlock(candidate, hasClipboard) {
  let content = null;
  let method  = 'inline_direct'; // default; overridden below if clipboard succeeds

  // --- Pass A: Copy button → clipboard ---
  if (hasClipboard && candidate.copyButton) {
    try {
      candidate.copyButton.click();
      await wait(SAFETY_LIMITS.CLIPBOARD_READ_DELAY_MS);
      const text = await navigator.clipboard.readText();

      if (text && text.trim().length > 0) {
        content = text;
        method  = 'inline_clipboard';
      }
    } catch (err) {
      console.warn(
        `[Chat Archive] Inline code block clipboard extraction failed for "${candidate.title}":`,
        err.message
      );
      // Fall through to Pass B
    }
  }

  // --- Pass B: Direct innerText read ---
  if (!content && candidate.codeElement) {
    const text = candidate.codeElement.innerText;
    if (text && text.trim().length > 0) {
      content = text;
      method  = 'inline_direct';
    }
  }

  if (!content) {
    console.warn(
      `[Chat Archive] Both extraction passes failed for inline code block "${candidate.title}"`
    );
  }

  return { content, method };
}

// --- src/extractors/artifacts/artifact-detector.js ---
// =============================================================================
// Chat Archive — Artifact Detector
// =============================================================================
// Scans a single [data-test-render-count] turn container for artifact surfaces
// and returns a flat array of ArtifactCandidate descriptors.
//
// Two surfaces are detected:
//
//   Surface A — Artifact cards  (.artifact-block-cell)
//     Produced by Claude's present_files tool.
//     Each card has a View button that opens the content panel.
//     DOM structure (confirmed June 2026):
//       div.group/artifact-block
//         button[aria-label="View {title}"]
//         div.artifact-block-cell
//           div.leading-tight.text-sm.line-clamp-1   ← title
//           div.text-xs.line-clamp-1.text-text-400   ← type label ("SH", "Code · HTML", etc.)
//           button[aria-label="Download {title}"]    ← do NOT click
//
//   Surface B — Inline code blocks  (div[role="group"][aria-label="… code"])
//     Fenced code blocks rendered in assistant turn text.
//     DOM structure (confirmed June 2026):
//       div[role="group"][aria-label="{lang} code"]
//         div.text-text-500.font-small               ← language label ("bash", "python", etc.)
//         pre.code-block__code
//           code.language-{lang}                     ← content via innerText
//         button[aria-label="Copy to clipboard"]     ← copy button
//
// Candidates are returned in DOM order (cards first within a turn, then code
// blocks), with positionInTurn assigned sequentially across both surfaces.
// positionInTurn is used by claude.js for stable ordering within the manifest.
//
// This module does NOT extract content — it only builds descriptors.
// Content extraction is handled by artifact-panel.js.
//
// Dependencies (injected via build concatenation order):
//   artifact-types.js — resolveType(), resolveCodeBlockLang(), extForCanonical()
// =============================================================================

/**
 * Scan a turn container for all artifact surfaces.
 *
 * @param {Element} container  - A [data-test-render-count] turn pair element
 * @param {number}  turnIndex  - 0-based index of this turn in the conversation
 * @returns {ArtifactCandidate[]}
 */
function detectArtifacts(container, turnIndex) {
  const candidates = [];
  let position = 0;

  // --- Surface A: Artifact cards ---
  const cells = container.querySelectorAll('.artifact-block-cell');

  for (const cell of cells) {
    const titleEl = cell.querySelector('div.leading-tight.text-sm.line-clamp-1');

    // Type label selector uses multiple strategies — the exact element and classes
    // vary by artifact type (div vs span, presence of line-clamp-1, etc.).
    // Try the confirmed spec selector first; fall back to any text-text-400
    // descendant that isn't the title element.
    const typeLabelEl =
      cell.querySelector('div.text-xs.line-clamp-1.text-text-400') ||
      cell.querySelector('span.text-xs.line-clamp-1.text-text-400') ||
      cell.querySelector('[class*="text-text-400"]:not([class*="leading-tight"])') ||
      null;

    const title     = titleEl?.innerText?.trim()     || 'Untitled';
    const typeLabel = typeLabelEl?.innerText?.trim() || '';

    // View button lives in the parent card element (sibling of .artifact-block-cell).
    // Walking to parentElement is more reliable than querying the full turn container,
    // which could match buttons from other cards in the same turn.
    const outerCard  = cell.parentElement;
    const viewButton = outerCard
      ? outerCard.querySelector('button[aria-label^="View "]')
      : null;

    if (!viewButton) {
      // Without a View button we cannot open the panel — skip this card.
      // Possible causes: DOM change, artifact still loading, or a "Download only" card.
      console.warn(
        `[Chat Archive] Artifact card "${title}" has no View button — skipping.` +
        ' If this artifact should be exported, please report the DOM structure.'
      );
      continue;
    }

    const { canonical: canonicalType, ext: extension } = resolveType(typeLabel);

    candidates.push({
      surface:       'card',
      title,
      typeLabel,
      canonicalType,
      extension,
      turnIndex,
      positionInTurn: position++,
      viewButton,
      copyButton:  null,
      codeElement: null,
    });
  }

  // --- Surface B: Inline code blocks ---
  // Only present in assistant turns, but we query the full container for
  // simplicity — user turn text does not render code block UI.
  const codeBlocks = container.querySelectorAll(
    'div[role="group"][aria-label$=" code"]'
  );

  for (const block of codeBlocks) {
    // Language label element
    const langEl = block.querySelector('div.text-text-500.font-small');
    const lang   = langEl?.innerText?.trim().toLowerCase() || '';

    // Copy button (opacity-0 by default, but clickable without hover)
    const copyButton = block.querySelector('button[aria-label="Copy to clipboard"]') || null;

    // Code element — try most-specific selector first, fall back to generic
    const codeElement =
      block.querySelector('pre.code-block__code code') ||
      block.querySelector('code[class*="language-"]') ||
      block.querySelector('pre code') ||
      null;

    if (!codeElement && !copyButton) {
      // Can't extract via either method — no point creating a candidate
      console.warn(
        `[Chat Archive] Inline code block (lang: "${lang}") has no code element` +
        ' and no copy button — skipping.'
      );
      continue;
    }

    const canonicalType = resolveCodeBlockLang(lang);
    const extension     = extForCanonical(canonicalType);

    // Title for inline code blocks is the language string.
    // Falls back to 'code' for unlabelled blocks.
    const title = lang || 'code';

    candidates.push({
      surface:       'code_block',
      title,
      typeLabel:     lang,        // raw language string ("bash", "python", etc.)
      canonicalType,
      extension,
      turnIndex,
      positionInTurn: position++,
      viewButton:  null,
      copyButton,
      codeElement,
    });
  }

  return candidates;
}

// --- src/extractors/claude.js ---
// =============================================================================
// Chat Archive — Claude.ai Extractor (Pass 0 + Direct Text Fallback)
// =============================================================================
// Architecture: Appendix C
//
// Turn containers (either layout):
//   Current (Oct 2026): [data-testid="transcript-row"] — one row per message
//     human rows:    data-perf-row="human" + [data-testid="user-message"]
//     assistant rows: data-perf-row="assistant" + [data-testid="assistant-message"]
//   Legacy: [data-test-render-count] — one element wraps a user+assistant pair
//
// Scroll container:
//   Current: [data-autoscroll-container="true"] (class overflow-y-auto, not overflow-y-scroll)
//   Legacy:  .overflow-y-scroll.overflow-x-hidden.pt-6.flex-1
//
// Copy buttons: button[aria-label="Copy"]
//   Legacy also used button[data-testid="action-bar-copy"]
// Role signals: [data-testid="user-message"] (user), [data-is-streaming] (assistant)

async function extractClaudeConversation() {
  const startTime = Date.now();
  const turns = [];
  const errors = [];
  const rawArtifacts = [];    // { processed: ProcessedArtifact, turnNumber: number }
  let artifactPanelCount = 0; // Panel opens only (card surface)

  // 1. Find scroll container
  const scrollContainer = findClaudeScrollContainer();
  if (!scrollContainer) {
    return { turns: [], errors: ['Scroll container not found'], partial: true };
  }

  // Current Claude renders one transcript row per message. The legacy layout
  // wrapped each user+assistant pair in [data-test-render-count]. The extract
  // loop below asks each container for both roles, so a single-message row
  // simply yields one turn.
  const turnSelector = document.querySelector('[data-testid="transcript-row"]')
    ? '[data-testid="transcript-row"]'
    : '[data-test-render-count]';

  // 2. Load all turns via scrolling
  await scrollToLoadAll(scrollContainer, turnSelector, startTime);

  // 3. Get turn containers
  const turnContainers = document.querySelectorAll(turnSelector);
  console.log(`[Chat Archive] Claude: Found ${turnContainers.length} turn containers`);

  if (turnContainers.length === 0) {
    return { turns: [], errors: ['No turn containers found'], partial: true };
  }

  // 4. Test clipboard access
  const hasClipboard = await testClipboardAccess();
  console.log(`[Chat Archive] Claude: Clipboard access: ${hasClipboard}`);

  // 5. Extract each turn pair
  for (let i = 0; i < turnContainers.length; i++) {
    if (Date.now() - startTime > SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS) {
      errors.push(`Extraction timed out after ${SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS}ms`);
      break;
    }
    if (turns.length >= SAFETY_LIMITS.MAX_TURNS) {
      errors.push(`Hit maximum turn limit (${SAFETY_LIMITS.MAX_TURNS})`);
      break;
    }

    const container = turnContainers[i];

    try {
      // Scroll into view to ensure content is rendered
      container.scrollIntoView({ behavior: 'instant', block: 'center' });
      await wait(150);

      // Extract user turn
      const userTurn = await extractClaudeTurn(container, 'user', hasClipboard);
      if (userTurn) {
        userTurn.artifacts = [];
        turns.push(flagIfOversized(userTurn));
      }

      // Extract assistant turn
      const assistantTurn = await extractClaudeTurn(container, 'assistant', hasClipboard);
      if (assistantTurn) {
        assistantTurn.artifacts = [];
        turns.push(flagIfOversized(assistantTurn));
      }

      // Artifact pass — runs after text extraction for this container.
      // Artifacts are associated with the assistant turn (current last turn, 1-indexed).
      const assistantTurnNumber = turns.length;
      const candidates = detectArtifacts(container, i);

      for (const candidate of candidates) {
        if (rawArtifacts.length >= SAFETY_LIMITS.MAX_ARTIFACT_PANELS) {
          errors.push(
            `Artifact limit (${SAFETY_LIMITS.MAX_ARTIFACT_PANELS}) reached at` +
            ` container ${i} — remaining artifacts skipped`
          );
          break;
        }

        try {
          const { content, method } = candidate.surface === 'card'
            ? await extractFromPanel(candidate, hasClipboard)
            : await extractInlineCodeBlock(candidate, hasClipboard);

          if (candidate.surface === 'card') artifactPanelCount++;

          const processed = await processArtifact(content, candidate, method);
          rawArtifacts.push({ processed, turnNumber: assistantTurnNumber });
        } catch (artifactErr) {
          errors.push(
            `Error extracting artifact "${candidate.title}" in container ${i}: ${artifactErr.message}`
          );
          console.warn(`[Chat Archive] Claude: Artifact error in container ${i}:`, artifactErr);
        }
      }
    } catch (err) {
      errors.push(`Error extracting container ${i}: ${err.message}`);
      console.warn(`[Chat Archive] Claude: Error on container ${i}:`, err);
    }
  }

  // Assemble artifact manifest and populate turn cross-references
  const { manifest: artifactManifest, sidecarFiles } = rawArtifacts.length > 0
    ? assembleArtifactManifest(rawArtifacts, turns)
    : { manifest: [], sidecarFiles: [] };

  console.log(
    `[Chat Archive] Claude: Extracted ${turns.length} turns,` +
    ` ${rawArtifacts.length} artifact(s), ${errors.length} errors`
  );
  return {
    turns,
    errors,
    partial: errors.length > 0,
    artifactManifest,
    sidecarFiles,
  };
}

/**
 * Extract a single turn (user or assistant) from a turn-pair container.
 * Pass 0: Try copy button → clipboard. Fallback: direct text extraction.
 */
async function extractClaudeTurn(container, role, hasClipboard) {
  // Determine which sub-element to target
  const roleSelector = role === 'user'
    ? '[data-testid="user-message"]'
    : '[data-is-streaming]';

  // Fallback role selector
  const fallbackSelector = role === 'user'
    ? '.font-user-message'
    : '.font-claude-response';

  const roleElement = container.querySelector(roleSelector)
    || container.querySelector(fallbackSelector);

  if (!roleElement) return null;

  // Find the nearest group container (for hover-triggering copy button visibility)
  const groupContainer = roleElement.closest('.group') || roleElement;

  let content = null;
  let extractionMethod = 'direct';

  // --- Pass 0: Clipboard via copy button ---
  if (hasClipboard) {
    try {
      // Trigger hover to ensure button is interactable
      groupContainer.dispatchEvent(new MouseEvent('mouseenter', { bubbles: true }));
      await wait(SAFETY_LIMITS.HOVER_SETTLE_MS);

      // Find copy button within this turn's group.
      // Current Claude: button[aria-label="Copy"]. Off-screen user rows often
      // omit the toolbar until "Show message actions" is activated.
      // Legacy: button[data-testid="action-bar-copy"], two per pair.
      let copyButton = findClaudeCopyButton(groupContainer, container, role);
      if (!copyButton) {
        const reveal = container.querySelector('button[aria-label^="Show message actions"]');
        if (reveal) {
          reveal.click();
          await wait(150);
          copyButton = findClaudeCopyButton(groupContainer, container, role);
        }
      }

      if (copyButton) {
        const clipboardContent = await clickCopyAndRead(copyButton);
        if (clipboardContent && clipboardContent.trim().length > 0) {
          content = clipboardContent;
          extractionMethod = 'clipboard';
        }
      }

      groupContainer.dispatchEvent(new MouseEvent('mouseleave', { bubbles: true }));
    } catch (err) {
      console.warn(`[Chat Archive] Claude: Clipboard extraction failed for ${role}:`, err);
    }
  }

  // --- Fallback: Direct text extraction ---
  if (!content) {
    content = extractClaudeDirectText(container, role);
    extractionMethod = 'direct';
  }

  if (!content || content.trim().length === 0) return null;

  // Timestamp. Current Claude uses <time datetime="...">. Legacy used a styled span.
  const timestampEl = container.querySelector('time[datetime]')
    || container.querySelector('span.text-text-500.text-xs');
  const timestamp = timestampEl?.getAttribute?.('datetime')
    || timestampEl?.textContent?.trim()
    || undefined;

  return {
    role,
    content: content.trim(),
    timestamp,
    extractionMethod,
    confidence: 0.95,
    classificationSource: 'structural',
  };
}

/**
 * Find the correct copy button for a specific role within a turn-pair container.
 * Each data-test-render-count container has TWO groups (user + assistant),
 * each with their own action bar and copy button.
 */
function findClaudeCopyButton(groupContainer, pairContainer, role) {
  // Current transcript rows: aria-label="Copy" (no data-testid).
  // Exact match avoids "Copy to clipboard" on inline code blocks.
  let btn = groupContainer.querySelector('button[aria-label="Copy"]');
  if (btn) return btn;

  // Legacy action bar.
  btn = groupContainer.querySelector('button[data-testid="action-bar-copy"]');
  if (btn) return btn;

  btn = findActionButton(groupContainer, ['Copy']);
  if (btn) return btn;

  // If the group didn't have it, search the whole turn container.
  // Legacy pairs have one action-bar-copy per role; pick by position.
  const allCopyBtns = pairContainer.querySelectorAll(
    'button[aria-label="Copy"], button[data-testid="action-bar-copy"]'
  );
  if (allCopyBtns.length === 0) return null;

  if (allCopyBtns.length === 1) return allCopyBtns[0];

  // Multiple copy buttons — pick by position:
  // First copy button belongs to user, second to assistant
  if (role === 'user') return allCopyBtns[0];
  if (role === 'assistant') return allCopyBtns[allCopyBtns.length - 1];

  return allCopyBtns[0];
}

/**
 * Direct text extraction fallback for Claude.
 */
function extractClaudeDirectText(container, role) {
  if (role === 'user') {
    const el = container.querySelector('[data-testid="user-message"]');
    return el?.textContent?.trim() || '';
  }

  // Reply prose only. A single assistant row can contain several blocks
  // (text, then a tool row, then more text). [data-is-streaming] also wraps
  // tool-status chrome and the action bar, so it is the last resort.
  // querySelectorAll returns each element once even if it matches both selectors.
  const blocks = container.querySelectorAll('[data-perf-reply-text], .standard-markdown');
  if (blocks.length > 0) {
    return Array.from(blocks)
      .map((el) => el.textContent?.trim() || '')
      .filter(Boolean)
      .join('\n\n');
  }

  const response = container.querySelector('.font-claude-response');
  if (response) return response.textContent?.trim() || '';

  const streaming = container.querySelector('[data-testid="assistant-message"], [data-is-streaming]');
  return streaming?.textContent?.trim() || '';
}

/**
 * Find Claude's scrollable chat container.
 */
function findClaudeScrollContainer() {
  const turnInside = '[data-testid="transcript-row"], [data-test-render-count]';
  const strategies = [
    // Current Claude: stable hook on the transcript scroller (overflow-y-auto).
    () => document.querySelector('[data-autoscroll-container="true"]'),
    // Legacy class combo from the paired-turn layout (overflow-y-scroll).
    () => document.querySelector('.overflow-y-scroll.overflow-x-hidden.pt-6.flex-1'),
    () => {
      const scrollables = document.querySelectorAll(
        '[class*="overflow-y-auto"], [class*="overflow-y-scroll"]'
      );
      for (const el of scrollables) {
        if (el.querySelector(turnInside)) return el;
      }
      return null;
    },
    () => {
      const firstTurn = document.querySelector(turnInside);
      return firstTurn ? findScrollableAncestor(firstTurn) : null;
    },
  ];

  for (const strategy of strategies) {
    const result = strategy();
    if (result) return result;
  }
  return null;
}

/**
 * Group raw artifacts into a versioned manifest, populate turn cross-references,
 * and produce a flat sidecar file list for zip assembly.
 *
 * Identity key: title + canonical_type
 *   Cards with the same title and type across turns are treated as versions
 *   of the same logical artifact. Version numbering is 1-indexed in turn order.
 *
 * Artifact IDs: 'artifact-001', 'artifact-002', ... (first-appearance order)
 *
 * changed flag:
 *   v1 is always true (no prior version to compare).
 *   v2+ is true if content_hash differs from the previous version.
 *
 * Side effect: mutates turns[turnNumber - 1].artifacts[] with cross-reference objects.
 *
 * @param {Array<{processed: Object, turnNumber: number}>} rawArtifacts
 * @param {Array<Object>} turns  - Mutable turns array from extractClaudeConversation
 * @returns {{ manifest: Array, sidecarFiles: Array<{filename: string, content: string}> }}
 */
function assembleArtifactManifest(rawArtifacts, turns) {
  // Group by identity key — Map preserves insertion order (first-appearance ordering)
  const groups = new Map();
  let idCounter = 1;

  for (const entry of rawArtifacts) {
    const { processed } = entry;
    const key = `${processed.title}|${processed.canonical_type}`;

    if (!groups.has(key)) {
      groups.set(key, {
        artifactId: 'artifact-' + String(idCounter++).padStart(3, '0'),
        entries: [],
      });
    }
    groups.get(key).entries.push(entry);
  }

  const manifest    = [];
  const sidecarFiles = [];

  for (const [, group] of groups) {
    const { artifactId, entries } = group;
    const first = entries[0].processed;

    const versions = entries.map((entry, vIdx) => {
      const { processed, turnNumber } = entry;
      const vNum         = vIdx + 1;
      const prevHash     = vIdx > 0 ? entries[vIdx - 1].processed.content_hash : null;
      const slug         = slugify(processed.title);
      const sidecarFilename = `${artifactId}-v${vNum}-${slug}${processed.extension}`;

      // Register content for zip assembly.
      // binary_fetch → Uint8Array, flagged binary: true so JSZip encodes correctly.
      // browser_download → null content, no sidecar entry (file is in user's Downloads).
      if (processed.content !== null) {
        sidecarFiles.push({
          filename: sidecarFilename,
          content:  processed.content,
          ...(processed.content instanceof Uint8Array && { binary: true }),
        });
      }

      // Populate cross-reference on the turn object (1-indexed → 0-indexed array)
      const turnObj = turns[turnNumber - 1];
      if (turnObj) {
        if (!Array.isArray(turnObj.artifacts)) turnObj.artifacts = [];
        turnObj.artifacts.push({
          artifact_id:    artifactId,
          version_number: vNum,
          title:          processed.title,
          canonical_type: processed.canonical_type,
          surface:        processed.surface,
        });
      }

      return {
        version_number:    vNum,
        turn:              turnNumber,
        // null when content could not be captured (browser_download fallback)
        sidecar_filename:  processed.content !== null ? sidecarFilename : null,
        content_hash:      processed.content_hash,
        char_count:        processed.char_count,
        line_count:        processed.line_count,
        // byte_count is set for binary_fetch; expected_filename for browser_download
        ...(processed.byte_count       != null && { byte_count:       processed.byte_count }),
        ...(processed.expected_filename        && { expected_filename: processed.expected_filename }),
        extraction_method: processed.extraction_method,
        extracted_at:      new Date().toISOString(),
        changed:           prevHash === null || processed.content_hash !== prevHash,
        malformed:         processed.malformed,
        type_unknown:      processed.type_unknown,
        oversized:         processed.oversized,
        supplementary:     processed.supplementary,
      };
    });

    manifest.push({
      artifact_id:    artifactId,
      title:          first.title,
      canonical_type: first.canonical_type,
      extension:      first.extension,
      version_count:  versions.length,
      versions,
    });
  }

  return { manifest, sidecarFiles };
}

// --- src/extractors/chatgpt.js ---
// =============================================================================
// Chat Archive — ChatGPT Extractor (Pass 0 + Direct Text Fallback)
// =============================================================================
// Architecture: Appendix E
// Turn container: article[data-testid="conversation-turn-{N}"] — one per turn (flat)
// Copy button: button[data-testid="copy-turn-action-button"] on both roles
// Role signals: data-turn="user"|"assistant" on <article> (0.99)
//               data-message-author-role="user"|"assistant" (0.99)

async function extractChatGPTConversation() {
  const startTime = Date.now();
  const turns = [];
  const errors = [];

  // 1. Find scroll container
  const scrollContainer = findChatGPTScrollContainer();
  if (!scrollContainer) {
    return { turns: [], errors: ['Scroll container not found'], partial: true };
  }

  // 2. Load all turns
  await scrollToLoadAll(
    scrollContainer,
    'article[data-testid^="conversation-turn-"]',
    startTime
  );

  // 3. Get all articles
  const articles = document.querySelectorAll('article[data-testid^="conversation-turn-"]');
  console.log(`[Chat Archive] ChatGPT: Found ${articles.length} turn articles`);

  if (articles.length === 0) {
    return { turns: [], errors: ['No turn articles found'], partial: true };
  }

  // 4. Clipboard test
  const hasClipboard = await testClipboardAccess();
  console.log(`[Chat Archive] ChatGPT: Clipboard access: ${hasClipboard}`);

  // 5. Extract each article
  for (let i = 0; i < articles.length; i++) {
    if (Date.now() - startTime > SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS) {
      errors.push(`Extraction timed out after ${SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS}ms`);
      break;
    }
    if (turns.length >= SAFETY_LIMITS.MAX_TURNS) {
      errors.push(`Hit maximum turn limit (${SAFETY_LIMITS.MAX_TURNS})`);
      break;
    }

    const article = articles[i];

    try {
      article.scrollIntoView({ behavior: 'instant', block: 'center' });
      await wait(150);

      const turn = await extractChatGPTTurn(article, hasClipboard);
      if (turn) turns.push(flagIfOversized(turn));
    } catch (err) {
      errors.push(`Error extracting turn ${i}: ${err.message}`);
      console.warn(`[Chat Archive] ChatGPT: Error on turn ${i}:`, err);
    }
  }

  console.log(`[Chat Archive] ChatGPT: Extracted ${turns.length} turns, ${errors.length} errors`);
  return { turns, errors, partial: errors.length > 0 };
}

async function extractChatGPTTurn(article, hasClipboard) {
  // --- Role detection (multiple high-confidence signals) ---
  let role = article.getAttribute('data-turn'); // 'user' or 'assistant'

  if (!role) {
    // Fallback: data-message-author-role
    const msgDiv = article.querySelector('[data-message-author-role]');
    role = msgDiv?.getAttribute('data-message-author-role');
  }

  if (!role) {
    // Fallback: screen reader heading
    const h5 = article.querySelector('h5.sr-only');
    const h6 = article.querySelector('h6.sr-only');
    if (h5 && h5.textContent?.includes('You said')) role = 'user';
    else if (h6 && h6.textContent?.includes('ChatGPT said')) role = 'assistant';
  }

  if (role !== 'user' && role !== 'assistant') return null;

  // --- Turn metadata ---
  const testId = article.getAttribute('data-testid') || '';
  const turnNumber = parseInt(testId.replace('conversation-turn-', '')) || 0;
  const turnId = article.getAttribute('data-turn-id') || '';
  const msgDiv = article.querySelector('[data-message-author-role]');
  const modelSlug = msgDiv?.getAttribute('data-message-model-slug') || undefined;

  // --- Pass 0: Clipboard extraction ---
  let content = null;
  let extractionMethod = 'direct';

  if (hasClipboard) {
    try {
      const copyBtn = article.querySelector('button[data-testid="copy-turn-action-button"]');
      if (!copyBtn) {
        // Fuzzy fallback
        const fallback = findActionButton(article, ['Copy']);
        if (fallback) {
          const clipContent = await clickCopyAndRead(fallback);
          if (clipContent && clipContent.trim().length > 0) {
            content = clipContent;
            extractionMethod = 'clipboard';
          }
        }
      } else {
        const clipContent = await clickCopyAndRead(copyBtn);
        if (clipContent && clipContent.trim().length > 0) {
          content = clipContent;
          extractionMethod = 'clipboard';
        }
      }
    } catch (err) {
      console.warn(`[Chat Archive] ChatGPT: Clipboard failed for turn ${turnNumber}:`, err);
    }
  }

  // --- Fallback: Direct text ---
  if (!content) {
    content = extractChatGPTDirectText(article, role);
    extractionMethod = 'direct';
  }

  if (!content || content.trim().length === 0) return null;

  return {
    role,
    content: content.trim(),
    turnNumber,
    turnId,
    modelSlug,
    extractionMethod,
    confidence: 0.99, // data-turn attribute is extremely reliable
    classificationSource: 'structural',
  };
}

function extractChatGPTDirectText(article, role) {
  if (role === 'user') {
    const el = article.querySelector('.whitespace-pre-wrap');
    return el?.textContent?.trim() || '';
  } else {
    // Try .markdown.prose first, then broader selectors
    const markdown = article.querySelector('.markdown.prose');
    if (markdown) return markdown.textContent?.trim() || '';

    const markdownNew = article.querySelector('.markdown');
    if (markdownNew) return markdownNew.textContent?.trim() || '';

    // Last resort: grab all text from the message div
    const msgDiv = article.querySelector('[data-message-author-role="assistant"]');
    return msgDiv?.textContent?.trim() || '';
  }
}

function findChatGPTScrollContainer() {
  const strategies = [
    () => document.querySelector('[data-scroll-root]'),
    () => {
      const firstArticle = document.querySelector('article[data-testid^="conversation-turn-"]');
      return firstArticle ? findScrollableAncestor(firstArticle) : null;
    },
    () => document.querySelector('main [class*="overflow-y-auto"]'),
  ];

  for (const strategy of strategies) {
    const result = strategy();
    if (result) return result;
  }
  return null;
}


// --- src/extractors/gemini.js ---
// =============================================================================
// Chat Archive — Gemini Extractor (Pass 0 + Direct Text Fallback)
// =============================================================================
// Architecture: Appendix D
// Turn container: div.conversation-container[id] wraps <user-query> + <model-response>
// Copy buttons: aria-label="Copy prompt" (user), data-test-id="copy-button" (assistant)
// Role signals: <user-query> (0.99), <model-response> (0.99)

async function extractGeminiConversation() {
  const startTime = Date.now();
  const turns = [];
  const errors = [];

  // 1. Find scroll container
  const scrollContainer = findGeminiScrollContainer();
  if (!scrollContainer) {
    return { turns: [], errors: ['Scroll container not found'], partial: true };
  }

  // 2. Load all turns
  await scrollToLoadAll(
    scrollContainer,
    'div.conversation-container[id]',
    startTime
  );

  // 3. Get turn containers
  const turnContainers = document.querySelectorAll('div.conversation-container[id]');
  console.log(`[Chat Archive] Gemini: Found ${turnContainers.length} turn containers`);

  if (turnContainers.length === 0) {
    // Fallback: try older selectors
    const oldContainers = document.querySelectorAll('ms-chat-turn');
    if (oldContainers.length > 0) {
      console.log(`[Chat Archive] Gemini: Found ${oldContainers.length} legacy ms-chat-turn elements`);
      return extractGeminiLegacy(oldContainers, startTime);
    }
    return { turns: [], errors: ['No turn containers found'], partial: true };
  }

  // 4. Clipboard test
  const hasClipboard = await testClipboardAccess();
  console.log(`[Chat Archive] Gemini: Clipboard access: ${hasClipboard}`);

  // 5. Extract each turn pair
  for (let i = 0; i < turnContainers.length; i++) {
    if (Date.now() - startTime > SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS) {
      errors.push(`Extraction timed out after ${SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS}ms`);
      break;
    }
    if (turns.length >= SAFETY_LIMITS.MAX_TURNS) {
      errors.push(`Hit maximum turn limit (${SAFETY_LIMITS.MAX_TURNS})`);
      break;
    }

    const container = turnContainers[i];
    const turnId = container.id;

    try {
      container.scrollIntoView({ behavior: 'instant', block: 'center' });
      await wait(200);

      // --- User turn ---
      const userQuery = container.querySelector('user-query');
      if (userQuery) {
        const userTurn = await extractGeminiUserTurn(userQuery, turnId, hasClipboard);
        if (userTurn) turns.push(flagIfOversized(userTurn));
      }

      // --- Assistant turn ---
      const modelResponse = container.querySelector('model-response');
      if (modelResponse) {
        const assistantTurn = await extractGeminiAssistantTurn(modelResponse, turnId, hasClipboard);
        if (assistantTurn) turns.push(flagIfOversized(assistantTurn));
      }
    } catch (err) {
      errors.push(`Error extracting container ${i} (${turnId}): ${err.message}`);
      console.warn(`[Chat Archive] Gemini: Error on container ${i}:`, err);
    }
  }

  console.log(`[Chat Archive] Gemini: Extracted ${turns.length} turns, ${errors.length} errors`);
  return { turns, errors, partial: errors.length > 0 };
}

async function extractGeminiUserTurn(userQuery, turnId, hasClipboard) {
  let content = null;
  let extractionMethod = 'direct';

  // Pass 0: Copy button
  if (hasClipboard) {
    try {
      const copyBtn = userQuery.querySelector('button[aria-label="Copy prompt"]')
        || findActionButton(userQuery, ['Copy prompt', 'Copy']);
      if (copyBtn) {
        const clipContent = await clickCopyAndRead(copyBtn);
        if (clipContent && clipContent.trim().length > 0) {
          content = clipContent;
          extractionMethod = 'clipboard';
        }
      }
    } catch (err) {
      console.warn(`[Chat Archive] Gemini: User clipboard failed:`, err);
    }
  }

  // Fallback: direct text
  if (!content) {
    const textEl = userQuery.querySelector('.query-text-line');
    content = textEl?.textContent?.trim() || '';

    // Broader fallback
    if (!content) {
      const queryText = userQuery.querySelector('.query-text');
      content = queryText?.textContent?.trim() || '';
    }
    if (!content) {
      content = userQuery.textContent?.trim() || '';
    }
    extractionMethod = 'direct';
  }

  if (!content || content.trim().length === 0) return null;

  return {
    role: 'user',
    content: content.trim(),
    turnId,
    extractionMethod,
    confidence: 0.99,
    classificationSource: 'structural',
  };
}

async function extractGeminiAssistantTurn(modelResponse, turnId, hasClipboard) {
  let content = null;
  let extractionMethod = 'direct';

  // Pass 0: Copy button
  if (hasClipboard) {
    try {
      const copyBtn = modelResponse.querySelector('button[data-test-id="copy-button"]')
        || modelResponse.querySelector('button[aria-label="Copy"]')
        || findActionButton(modelResponse, ['Copy']);
      if (copyBtn) {
        const clipContent = await clickCopyAndRead(copyBtn);
        if (clipContent && clipContent.trim().length > 0) {
          content = clipContent;
          extractionMethod = 'clipboard';
        }
      }
    } catch (err) {
      console.warn(`[Chat Archive] Gemini: Assistant clipboard failed:`, err);
    }
  }

  // Fallback: direct text (with citation stripping)
  if (!content) {
    content = extractGeminiAssistantDirectText(modelResponse);
    extractionMethod = 'direct';
  }

  if (!content || content.trim().length === 0) return null;

  return {
    role: 'assistant',
    content: content.trim(),
    turnId,
    extractionMethod,
    confidence: 0.99,
    classificationSource: 'structural',
  };
}

/**
 * Direct text extraction for Gemini assistant messages.
 * Clones the element and strips citations, avatars, processing states.
 */
function extractGeminiAssistantDirectText(modelResponse) {
  const markdown = modelResponse.querySelector('.markdown.markdown-main-panel');
  if (!markdown) {
    // Broader fallback
    const messageContent = modelResponse.querySelector('message-content');
    if (messageContent) {
      const clone = messageContent.cloneNode(true);
      stripGeminiDecorations(clone);
      return clone.textContent?.trim() || '';
    }
    return modelResponse.textContent?.trim() || '';
  }

  const clone = markdown.cloneNode(true);
  stripGeminiDecorations(clone);
  return clone.textContent?.trim() || '';
}

/**
 * Remove decorative/non-content elements from a Gemini DOM clone.
 */
function stripGeminiDecorations(element) {
  const selectorsToRemove = [
    'source-footnote',
    'source-inline-chip',
    'sources-carousel-inline',
    'bard-avatar',
    'processing-state',
    'tts-control',
    'thumb-up-button',
    'thumb-down-button',
    'copy-button',
    '.code-block-decoration',
    'freemium-rag-disclaimer',
    'sensitive-memories-banner',
  ];

  for (const selector of selectorsToRemove) {
    try {
      element.querySelectorAll(selector).forEach((el) => el.remove());
    } catch {
      // Invalid selector — skip
    }
  }
}

/**
 * Legacy Gemini extraction for older DOM structure (ms-chat-turn).
 */
async function extractGeminiLegacy(turnElements, startTime) {
  const turns = [];
  const errors = [];

  for (let i = 0; i < turnElements.length; i++) {
    if (Date.now() - startTime > SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS) break;
    if (turns.length >= SAFETY_LIMITS.MAX_TURNS) break;

    try {
      const el = turnElements[i];
      const content = el.textContent?.trim() || '';
      if (!content) continue;

      // Legacy role detection: alternating pattern
      turns.push({
        role: i % 2 === 0 ? 'user' : 'assistant',
        content,
        extractionMethod: 'direct',
        confidence: 0.60,
        classificationSource: 'heuristic-alternation',
      });
    } catch (err) {
      errors.push(`Legacy turn ${i}: ${err.message}`);
    }
  }

  return { turns, errors, partial: true };
}

function findGeminiScrollContainer() {
  const strategies = [
    () => document.querySelector('infinite-scroller[data-test-id="chat-history-container"]'),
    () => document.querySelector('#chat-history'),
    () => document.querySelector('.chat-history-scroll-container'),
    () => {
      const firstTurn = document.querySelector('div.conversation-container[id]');
      return firstTurn ? findScrollableAncestor(firstTurn) : null;
    },
  ];

  for (const strategy of strategies) {
    const result = strategy();
    if (result) return result;
  }
  return null;
}


// --- src/extractors/grok.js ---
// =============================================================================
// Chat Archive — Grok.com Extractor (Pass 0 + Direct Text Fallback)
// =============================================================================
// Architecture: Appendix A
// Turn container: div[id^="response-"] with scroll-margin-top
// Copy buttons: aria-label="Copy" on both roles (opacity-0 but clickable)
// Role signals: items-end (user) vs items-start (assistant) — 0.95
//               Button count: 2 (user) vs 8+ (assistant) — 0.95
//               Bubble styling: bg-surface-l1 (user) vs w-full (assistant) — 0.90

async function extractGrokConversation() {
  const startTime = Date.now();
  const turns = [];
  const errors = [];

  // 1. Find scroll container
  const scrollContainer = findGrokScrollContainer();
  if (!scrollContainer) {
    return { turns: [], errors: ['Scroll container not found'], partial: true };
  }

  // 2. Load all turns
  await scrollToLoadAll(scrollContainer, 'div[id^="response-"]', startTime);

  // 3. Get turn containers
  const turnContainers = document.querySelectorAll('div[id^="response-"]');
  console.log(`[Chat Archive] Grok: Found ${turnContainers.length} turn containers`);

  if (turnContainers.length === 0) {
    return { turns: [], errors: ['No turn containers found'], partial: true };
  }

  // 4. Clipboard test
  const hasClipboard = await testClipboardAccess();
  console.log(`[Chat Archive] Grok: Clipboard access: ${hasClipboard}`);

  // 5. Extract each turn
  for (let i = 0; i < turnContainers.length; i++) {
    if (Date.now() - startTime > SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS) {
      errors.push(`Extraction timed out after ${SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS}ms`);
      break;
    }
    if (turns.length >= SAFETY_LIMITS.MAX_TURNS) {
      errors.push(`Hit maximum turn limit (${SAFETY_LIMITS.MAX_TURNS})`);
      break;
    }

    const container = turnContainers[i];

    try {
      container.scrollIntoView({ behavior: 'instant', block: 'center' });
      await wait(150);

      const turn = await extractGrokTurn(container, hasClipboard);
      if (turn) turns.push(flagIfOversized(turn));
    } catch (err) {
      errors.push(`Error extracting turn ${i}: ${err.message}`);
      console.warn(`[Chat Archive] Grok: Error on turn ${i}:`, err);
    }
  }

  console.log(`[Chat Archive] Grok: Extracted ${turns.length} turns, ${errors.length} errors`);
  return { turns, errors, partial: errors.length > 0 };
}

async function extractGrokTurn(container, hasClipboard) {
  const turnId = container.id; // "response-{uuid}"

  // --- Role detection (3 independent signals) ---
  const role = detectGrokRole(container);
  if (!role) return null;

  // --- Pass 0: Clipboard ---
  let content = null;
  let extractionMethod = 'direct';

  if (hasClipboard) {
    try {
      const copyBtn = container.querySelector('button[aria-label="Copy"]')
        || findActionButton(container, ['Copy']);
      if (copyBtn) {
        const clipContent = await clickCopyAndRead(copyBtn);
        if (clipContent && clipContent.trim().length > 0) {
          content = clipContent;
          extractionMethod = 'clipboard';
        }
      }
    } catch (err) {
      console.warn(`[Chat Archive] Grok: Clipboard failed for ${turnId}:`, err);
    }
  }

  // --- Fallback: Direct text ---
  if (!content) {
    content = extractGrokDirectText(container, role);
    extractionMethod = 'direct';
  }

  if (!content || content.trim().length === 0) return null;

  return {
    role,
    content: content.trim(),
    turnId,
    extractionMethod,
    confidence: 0.95,
    classificationSource: 'structural',
  };
}

/**
 * Detect role using three independent signals.
 * Signal 1: Container alignment (items-end = user, items-start = assistant)
 * Signal 2: Button count (2 = user, 8+ = assistant)
 * Signal 3: Message bubble styling (bg-surface-l1 = user)
 */
function detectGrokRole(container) {
  const signals = { user: 0, assistant: 0 };

  // Signal 1: Alignment classes
  const classes = container.className || '';
  if (classes.includes('items-end')) signals.user += 2;
  else if (classes.includes('items-start')) signals.assistant += 2;

  // Also check child flex containers for alignment
  const flexChild = container.querySelector('[class*="items-end"]');
  const flexChildStart = container.querySelector('[class*="items-start"]');
  if (flexChild && !flexChildStart) signals.user += 1;
  if (flexChildStart && !flexChild) signals.assistant += 1;

  // Signal 2: Button count
  const buttons = container.querySelectorAll('button');
  if (buttons.length <= 3) signals.user += 2;
  else if (buttons.length >= 5) signals.assistant += 2;

  // Signal 3: Bubble styling
  const hasBubble = container.querySelector('[class*="bg-surface-l1"]');
  const hasFullWidth = container.querySelector('[class*="max-w-none"]');
  if (hasBubble) signals.user += 1;
  if (hasFullWidth) signals.assistant += 1;

  // Signal 4: Edit button (user only)
  const editBtn = container.querySelector('button[aria-label="Edit"]');
  if (editBtn) signals.user += 2;

  // Signal 5: Regenerate button (assistant only)
  const regenBtn = container.querySelector('button[aria-label="Regenerate"]');
  if (regenBtn) signals.assistant += 2;

  // Signal 6: Response time indicator (assistant only)
  const responseTime = container.querySelector('[class*="text-xs"]');
  if (responseTime && /\d+ms/.test(responseTime.textContent || '')) {
    signals.assistant += 1;
  }

  if (signals.user > signals.assistant) return 'user';
  if (signals.assistant > signals.user) return 'assistant';

  // Tie-breaker: default to alternation pattern (handled by heuristics pass)
  return null;
}

function extractGrokDirectText(container, role) {
  // Look for the message content area
  const markdown = container.querySelector('.message-bubble .response-content-markdown');
  if (markdown) return markdown.textContent?.trim() || '';

  // Broader: any .markdown inside the container
  const markdownAlt = container.querySelector('.markdown');
  if (markdownAlt) return markdownAlt.textContent?.trim() || '';

  // Broadest: main text content, excluding buttons
  const clone = container.cloneNode(true);
  // Remove action bars, follow-up suggestions
  clone.querySelectorAll('button, [class*="follow-up"], #last-reply-container').forEach(
    (el) => el.remove()
  );
  return clone.textContent?.trim() || '';
}

function findGrokScrollContainer() {
  const strategies = [
    () => document.querySelector('.w-full.h-full.overflow-y-auto.overflow-x-hidden'),
    () => document.querySelector('[class*="overflow-y-auto"][class*="scrollbar-gutter"]'),
    () => {
      const firstTurn = document.querySelector('div[id^="response-"]');
      return firstTurn ? findScrollableAncestor(firstTurn) : null;
    },
  ];

  for (const strategy of strategies) {
    const result = strategy();
    if (result) return result;
  }
  return null;
}


// --- src/extractors/grok-x.js ---
// =============================================================================
// Chat Archive — Grok x.com Extractor (Pass 0 + Direct Text Fallback)
// =============================================================================
// Architecture: Appendix B
// CRITICAL: x.com/i/grok has ZERO common selectors with grok.com
// Framework: React Native Web (hashed classes: css-175oi2r, r-*)
// Copy button: aria-label="Copy text" on ASSISTANT only
// User turns: NO copy button — must use direct text extraction
// Role signals: follow_ups_list presence (assistant), button presence

async function extractGrokXConversation() {
  const startTime = Date.now();
  const turns = [];
  const errors = [];

  // 1. Find scroll container — no reliable selector, walk up from content
  const scrollContainer = findGrokXScrollContainer();
  if (!scrollContainer) {
    return { turns: [], errors: ['Scroll container not found'], partial: true };
  }

  // 2. Scroll to load all content
  // x.com Grok doesn't have clean turn containers — we need to identify turn boundaries
  await scrollToLoadAllGrokX(scrollContainer, startTime);

  // 3. Identify turn blocks
  // x.com Grok uses flat sibling divs without per-turn IDs.
  // Strategy: find all "Copy text" buttons (assistant markers) and work outward
  const turnBlocks = identifyGrokXTurnBlocks();
  console.log(`[Chat Archive] Grok-X: Identified ${turnBlocks.length} turn blocks`);

  if (turnBlocks.length === 0) {
    return { turns: [], errors: ['No turn blocks identified'], partial: true };
  }

  // 4. Clipboard test
  const hasClipboard = await testClipboardAccess();
  console.log(`[Chat Archive] Grok-X: Clipboard access: ${hasClipboard}`);

  // 5. Extract each turn
  for (let i = 0; i < turnBlocks.length; i++) {
    if (Date.now() - startTime > SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS) {
      errors.push(`Extraction timed out`);
      break;
    }
    if (turns.length >= SAFETY_LIMITS.MAX_TURNS) {
      errors.push(`Hit maximum turn limit`);
      break;
    }

    const block = turnBlocks[i];

    try {
      block.element.scrollIntoView({ behavior: 'instant', block: 'center' });
      await wait(150);

      const turn = await extractGrokXTurn(block, hasClipboard);
      if (turn) turns.push(flagIfOversized(turn));
    } catch (err) {
      errors.push(`Error on block ${i}: ${err.message}`);
      console.warn(`[Chat Archive] Grok-X: Error on block ${i}:`, err);
    }
  }

  console.log(`[Chat Archive] Grok-X: Extracted ${turns.length} turns, ${errors.length} errors`);
  return { turns, errors, partial: errors.length > 0 };
}

/**
 * Identify turn blocks in x.com/i/grok's flat DOM structure.
 * Strategy: 
 *   - Assistant turns have "Copy text" buttons and/or follow_ups_list
 *   - User turns are the blocks between assistant turns that have no action buttons
 */
function identifyGrokXTurnBlocks() {
  const blocks = [];

  // Find all major content containers in the chat area
  // x.com uses deeply nested divs with hashed classes
  // Best approach: find all "Copy text" buttons and their ancestor containers
  const copyButtons = document.querySelectorAll('button[aria-label="Copy text"]');
  const followUps = document.querySelectorAll('[data-testid="follow_ups_list"]');

  // Build a set of assistant container elements
  const assistantContainers = new Set();
  const assistantElements = [];

  for (const btn of copyButtons) {
    // Walk up to find the turn-level container
    // Typically: button → action bar → content block → turn container
    let container = btn.parentElement;
    for (let depth = 0; depth < 8 && container; depth++) {
      // Heuristic: turn containers tend to be direct children of the main scroll area
      if (container.parentElement &&
          container.parentElement.children.length > 2 &&
          container.previousElementSibling) {
        break;
      }
      container = container.parentElement;
    }
    if (container && !assistantContainers.has(container)) {
      assistantContainers.add(container);
      assistantElements.push({ element: container, role: 'assistant', copyButton: btn });
    }
  }

  // If we found assistant containers, their siblings before each are likely user turns
  if (assistantElements.length > 0) {
    // Get the parent that holds all turn siblings
    const parent = assistantElements[0].element.parentElement;
    if (!parent) return assistantElements;

    const children = Array.from(parent.children);
    let lastAssistantIdx = -1;

    for (let i = 0; i < children.length; i++) {
      const child = children[i];

      if (assistantContainers.has(child)) {
        // Everything between lastAssistantIdx and this is user content
        // But often there's just one user block before each assistant
        if (i > 0 && i - 1 > lastAssistantIdx) {
          // Check each block between last assistant and this assistant
          for (let j = lastAssistantIdx + 1; j < i; j++) {
            const candidate = children[j];
            const text = candidate.textContent?.trim() || '';
            // Filter out empty blocks, navigation, follow-ups
            if (text.length > 0 &&
                !candidate.querySelector('[data-testid="follow_ups_list"]') &&
                !candidate.querySelector('button[aria-label="Copy text"]') &&
                !candidate.querySelector('textarea')) {
              blocks.push({ element: candidate, role: 'user', copyButton: null });
            }
          }
        }
        blocks.push(assistantContainers.has(child)
          ? assistantElements.find((a) => a.element === child) || { element: child, role: 'assistant', copyButton: null }
          : { element: child, role: 'assistant', copyButton: null });
        lastAssistantIdx = i;
      }
    }

    return blocks;
  }

  // Fallback: no assistant markers found — try raw text extraction with heuristics
  return [];
}

async function extractGrokXTurn(block, hasClipboard) {
  const { element, role, copyButton } = block;

  let content = null;
  let extractionMethod = 'direct';

  // --- Pass 0: Clipboard (assistant only on x.com) ---
  if (role === 'assistant' && hasClipboard && copyButton) {
    try {
      const clipContent = await clickCopyAndRead(copyButton);
      if (clipContent && clipContent.trim().length > 0) {
        content = clipContent;
        extractionMethod = 'clipboard';
      }
    } catch (err) {
      console.warn(`[Chat Archive] Grok-X: Assistant clipboard failed:`, err);
    }
  }

  // --- Direct text extraction ---
  if (!content) {
    content = extractGrokXDirectText(element, role);
    extractionMethod = 'direct';
  }

  if (!content || content.trim().length === 0) return null;

  return {
    role,
    content: content.trim(),
    extractionMethod,
    confidence: role === 'assistant' ? 0.95 : 0.80,
    classificationSource: 'structural',
  };
}

function extractGrokXDirectText(element, role) {
  // Clone and strip non-content elements
  const clone = element.cloneNode(true);

  // Remove follow-up suggestions, buttons, textareas
  clone.querySelectorAll(
    '[data-testid="follow_ups_list"], button, textarea, svg, [role="img"]'
  ).forEach((el) => el.remove());

  // For user turns, look for the specific text container class
  if (role === 'user') {
    // x.com Grok user text containers have class r-1kt6imw
    const userText = element.querySelector('[class*="r-1kt6imw"]');
    if (userText) return userText.textContent?.trim() || '';
  }

  // For assistant turns, look for formatted content
  if (role === 'assistant') {
    const assistantText = element.querySelector('[class*="r-rjixqe"]');
    if (assistantText) return assistantText.textContent?.trim() || '';
  }

  return clone.textContent?.trim() || '';
}

async function scrollToLoadAllGrokX(scrollContainer, startTime) {
  let previousHeight = 0;
  let stableIterations = 0;
  let scrollIterations = 0;

  scrollContainer.scrollTop = 0;
  await wait(500);

  while (
    stableIterations < SAFETY_LIMITS.SCROLL_STABILITY_THRESHOLD &&
    scrollIterations < SAFETY_LIMITS.MAX_SCROLL_ITERATIONS
  ) {
    if (startTime && Date.now() - startTime > SAFETY_LIMITS.MAX_EXTRACTION_TIME_MS) break;

    const currentHeight = scrollContainer.scrollHeight;
    if (currentHeight === previousHeight) {
      stableIterations++;
    } else {
      stableIterations = 0;
      previousHeight = currentHeight;
    }

    scrollContainer.scrollBy(0, scrollContainer.clientHeight * 0.8);
    await wait(SAFETY_LIMITS.SCROLL_STEP_DELAY_MS);
    scrollIterations++;
  }

  scrollContainer.scrollTop = 0;
  await wait(200);
}

function findGrokXScrollContainer() {
  const strategies = [
    // x.com's Grok chat area
    () => {
      const grokSection = document.querySelector('[data-testid="GrokChat"]');
      if (grokSection) {
        const scrollable = grokSection.querySelector('[class*="overflow-y-auto"]')
          || grokSection.querySelector('[style*="overflow"]');
        if (scrollable) return scrollable;
        return findScrollableAncestor(grokSection);
      }
      return null;
    },
    // Generic: find scrollable ancestor of first copy button
    () => {
      const firstBtn = document.querySelector('button[aria-label="Copy text"]');
      return firstBtn ? findScrollableAncestor(firstBtn) : null;
    },
    // Broadest: main scrollable area on x.com
    () => document.querySelector('main [class*="overflow"][class*="auto"]'),
  ];

  for (const strategy of strategies) {
    const result = strategy();
    if (result) return result;
  }
  return null;
}


// --- src/heuristics/pass1.js ---
// =============================================================================
// Chat Archive — Pass 1: Structural Heuristics
// =============================================================================
// Classifies turns using rule-based pattern detection when Pass 0
// (button extraction) didn't produce confident role assignments.
//
// Heuristic rules are ordered by confidence:
//   H1: Explicit role attributes (0.95)
//   H2: Alternating binary pattern (0.85)
//   H3: Asymmetric text length (0.70)
//   H4: Background color differentiation (0.75)
//   H5: Alignment pattern (0.80)
//   H6: Avatar/icon presence (0.70)
//   H7: Code block density (0.60)
//
// Combined confidence = weighted average of all firing rules.
// Threshold: 0.75 — accept classification if combined >= 0.75

const HEURISTIC_THRESHOLD = 0.75;

/**
 * Run heuristic classification on an array of extracted turns.
 * Turns that already have confidence >= threshold are left untouched.
 * Turns with lower confidence (or no role) get heuristic analysis.
 *
 * @param {Array} turns - Array of turn objects from extractors
 * @returns {Array} Same array with updated role/confidence/classificationSource
 */
function applyHeuristics(turns) {
  if (turns.length === 0) return turns;

  // Collect turns that need classification
  const needsClassification = [];
  for (let i = 0; i < turns.length; i++) {
    if (!turns[i].role || (turns[i].confidence || 0) < HEURISTIC_THRESHOLD) {
      needsClassification.push(i);
    }
  }

  if (needsClassification.length === 0) {
    console.log('[Chat Archive] Heuristics: All turns already classified at high confidence');
    return turns;
  }

  console.log(`[Chat Archive] Heuristics: ${needsClassification.length} turns need classification`);

  // Run each heuristic rule across the full conversation for context
  const results = turns.map((turn, index) => ({
    index,
    scores: { user: 0, assistant: 0 },
    rulesApplied: [],
    totalWeight: 0,
  }));

  // H1: Explicit role attributes (already handled by extractors, but double-check)
  applyH1ExplicitRoles(turns, results);

  // H2: Alternating binary pattern
  applyH2AlternatingPattern(turns, results);

  // H3: Asymmetric text length
  applyH3TextLength(turns, results);

  // H4: Background color / styling differentiation (requires DOM — use cached data)
  // (Skipped in post-extraction heuristics — this runs on already-extracted text)

  // H5: Content-based alignment signals (encoded in content or metadata)
  applyH5ContentSignals(turns, results);

  // H7: Code block density
  applyH7CodeBlocks(turns, results);

  // Apply results to turns that need classification
  for (const idx of needsClassification) {
    const result = results[idx];
    if (result.totalWeight === 0) continue;

    const userScore = result.scores.user / result.totalWeight;
    const assistantScore = result.scores.assistant / result.totalWeight;
    const confidence = Math.max(userScore, assistantScore);
    const role = userScore > assistantScore ? 'user' : 'assistant';

    if (confidence >= HEURISTIC_THRESHOLD) {
      turns[idx].role = role;
      turns[idx].confidence = parseFloat(confidence.toFixed(3));
      turns[idx].classificationSource = 'heuristic';
      turns[idx].heuristicRules = result.rulesApplied;
    } else {
      // Mark as uncertain for User Resolution UI
      turns[idx].confidence = parseFloat(confidence.toFixed(3));
      turns[idx].classificationSource = 'heuristic-uncertain';
      turns[idx].heuristicRules = result.rulesApplied;
      turns[idx].needsUserResolution = true;
    }
  }

  const resolved = needsClassification.filter(
    (i) => turns[i].confidence >= HEURISTIC_THRESHOLD && turns[i].role
  ).length;
  console.log(`[Chat Archive] Heuristics: Resolved ${resolved}/${needsClassification.length} turns`);

  return turns;
}

// --- Individual Heuristic Rules ---

/**
 * H1: Explicit role attributes in content or metadata.
 * Confidence: 0.95. Weight: 3.
 */
function applyH1ExplicitRoles(turns, results) {
  for (let i = 0; i < turns.length; i++) {
    const turn = turns[i];

    // Already classified with high confidence from extractor
    if (turn.role && (turn.confidence || 0) >= 0.90) {
      const target = turn.role === 'user' ? 'user' : 'assistant';
      results[i].scores[target] += 3 * 0.95;
      results[i].totalWeight += 3;
      results[i].rulesApplied.push('H1-explicit');
    }
  }
}

/**
 * H2: Alternating binary pattern.
 * If we have high-confidence turns at known positions, the turns between them
 * should alternate. Confidence: 0.85. Weight: 2.
 */
function applyH2AlternatingPattern(turns, results) {
  // Find anchor points (turns with high confidence)
  const anchors = [];
  for (let i = 0; i < turns.length; i++) {
    if (turns[i].role && (turns[i].confidence || 0) >= 0.90) {
      anchors.push({ index: i, role: turns[i].role });
    }
  }

  if (anchors.length === 0) {
    // No anchors — assume first turn is user (most conversations start this way)
    for (let i = 0; i < turns.length; i++) {
      const expectedRole = i % 2 === 0 ? 'user' : 'assistant';
      results[i].scores[expectedRole] += 2 * 0.85;
      results[i].totalWeight += 2;
      results[i].rulesApplied.push('H2-alternation-noanchor');
    }
    return;
  }

  // Propagate from anchors
  for (let i = 0; i < turns.length; i++) {
    // Find nearest anchor
    let nearest = anchors[0];
    let minDist = Math.abs(i - nearest.index);
    for (const anchor of anchors) {
      const dist = Math.abs(i - anchor.index);
      if (dist < minDist) {
        minDist = dist;
        nearest = anchor;
      }
    }

    // Expected role based on distance from anchor (alternating)
    const offset = i - nearest.index;
    const anchorIsUser = nearest.role === 'user';
    const expectedRole = (offset % 2 === 0) === anchorIsUser ? 'user' : 'assistant';

    // Confidence decreases with distance from anchor
    const distancePenalty = Math.max(0, 1 - minDist * 0.05);
    const weight = 2 * distancePenalty;

    results[i].scores[expectedRole] += weight * 0.85;
    results[i].totalWeight += weight;
    results[i].rulesApplied.push('H2-alternation');
  }
}

/**
 * H3: Asymmetric text length.
 * User messages tend to be shorter than assistant responses.
 * Confidence: 0.70. Weight: 1.
 */
function applyH3TextLength(turns, results) {
  if (turns.length < 2) return;

  // Calculate median text length
  const lengths = turns.map((t) => (t.content || '').length);
  const sorted = [...lengths].sort((a, b) => a - b);
  const median = sorted[Math.floor(sorted.length / 2)];

  if (median === 0) return;

  for (let i = 0; i < turns.length; i++) {
    const len = lengths[i];
    const ratio = len / median;

    // Short messages are more likely user turns
    if (ratio < 0.5) {
      results[i].scores.user += 1 * 0.70;
      results[i].totalWeight += 1;
      results[i].rulesApplied.push('H3-short');
    } else if (ratio > 2.0) {
      results[i].scores.assistant += 1 * 0.70;
      results[i].totalWeight += 1;
      results[i].rulesApplied.push('H3-long');
    }
    // Near-median: no signal
  }
}

/**
 * H5: Content-based signals.
 * Assistant messages tend to contain markdown formatting, lists, code blocks.
 * User messages tend to be questions or short directives.
 * Confidence: 0.65. Weight: 1.
 */
function applyH5ContentSignals(turns, results) {
  for (let i = 0; i < turns.length; i++) {
    const text = turns[i].content || '';

    // Assistant signals
    let assistantSignals = 0;
    if (text.includes('```')) assistantSignals += 2;          // Code fences
    if (/^\s*[-*]\s/m.test(text)) assistantSignals += 1;     // Bullet lists
    if (/^\s*\d+\.\s/m.test(text)) assistantSignals += 1;   // Numbered lists
    if (/^#{1,3}\s/m.test(text)) assistantSignals += 1;      // Markdown headings
    if (text.length > 500) assistantSignals += 1;             // Long content

    // User signals
    let userSignals = 0;
    if (text.endsWith('?')) userSignals += 2;                 // Questions
    if (text.length < 100) userSignals += 1;                  // Short
    if (/^(can you|please|help|what|how|why|when|where|who|is|are|do|does)/i.test(text)) {
      userSignals += 1;                                       // Question starters
    }

    if (assistantSignals > userSignals) {
      results[i].scores.assistant += 1 * 0.65;
      results[i].totalWeight += 1;
      results[i].rulesApplied.push('H5-content-assistant');
    } else if (userSignals > assistantSignals) {
      results[i].scores.user += 1 * 0.65;
      results[i].totalWeight += 1;
      results[i].rulesApplied.push('H5-content-user');
    }
  }
}

/**
 * H7: Code block density.
 * Messages with code blocks are almost always assistant turns.
 * Confidence: 0.60 (lower because users sometimes paste code too).
 * Weight: 1.
 */
function applyH7CodeBlocks(turns, results) {
  for (let i = 0; i < turns.length; i++) {
    const text = turns[i].content || '';
    const codeBlocks = (text.match(/```/g) || []).length / 2;

    if (codeBlocks >= 1) {
      results[i].scores.assistant += 1 * 0.60;
      results[i].totalWeight += 1;
      results[i].rulesApplied.push('H7-codeblocks');
    }
  }
}

/**
 * Post-heuristic integrity: verify the overall conversation makes sense.
 * Returns an array of warning strings.
 */
function heuristicIntegrityCheck(turns) {
  const warnings = [];

  // Check that we have at least some role diversity
  const roles = new Set(turns.map((t) => t.role).filter(Boolean));
  if (roles.size < 2 && turns.length > 1) {
    warnings.push('All turns classified as the same role — heuristics may have failed');
  }

  // Check for runs of same role > 3
  let maxRun = 0;
  let currentRun = 1;
  for (let i = 1; i < turns.length; i++) {
    if (turns[i].role === turns[i - 1].role) {
      currentRun++;
      maxRun = Math.max(maxRun, currentRun);
    } else {
      currentRun = 1;
    }
  }
  if (maxRun > 3) {
    warnings.push(`${maxRun} consecutive turns with the same role detected`);
  }

  // Count uncertain turns
  const uncertain = turns.filter((t) => t.needsUserResolution).length;
  if (uncertain > 0) {
    warnings.push(`${uncertain} turn(s) could not be confidently classified`);
  }

  return warnings;
}


// --- src/utils/serializer.js ---
// =============================================================================
// Chat Archive — Serializer
// =============================================================================
// Transforms extracted turns into JSON (canonical format) and Markdown.
//
// CHANGELOG
// v0.2.1 — Fix: Escape HTML entities in Markdown output to prevent tag
//           contamination. Raw HTML in assistant content (e.g. <style>, <div>)
//           was breaking Markdown renderers by entering HTML mode mid-document.
//           JSON output is unaffected — raw content is preserved as-is there.
//           GitHub issue: HTML tag contamination in .md export (turn 20 bug)

/**
 * Escape HTML entities in a string for safe Markdown output.
 * Only applied in the Markdown serialization path — JSON stores raw content.
 *
 * Escapes: < > & " '
 * This prevents any HTML tags in conversation content from being interpreted
 * as HTML by Markdown renderers, which can corrupt all subsequent formatting.
 *
 * @param {string} text - Raw content string
 * @returns {string} - Content safe for Markdown output
 */
function escapeHtmlForMarkdown(text) {
  return text
    .replace(/&/g, '&amp;')   // Must be first — avoids double-escaping
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&#39;');
}

/**
 * Serialize extracted turns into the canonical JSON export format.
 * JSON stores raw, unescaped content — this is the source of truth.
 *
 * @param {Object} extraction - Result from an extractor { turns, errors, partial }
 * @param {string} platform - Platform identifier (e.g., 'claude')
 * @returns {Object} { json: string, metadata: Object, integrityWarnings: string[] }
 */
function serializeToJSON(extraction, platform) {
  const integrityWarnings = runIntegrityChecks(extraction.turns);

  const exportData = {
    schema_version: SCHEMA_VERSION,
    export_metadata: {
      source_platform: platformToDisplayName(platform),
      source_url: window.location.href,
      export_timestamp: new Date().toISOString(),
      extension_version: EXTENSION_VERSION,
      total_turns: extraction.turns.length,
      flagged_turns: extraction.turns.filter((t) => t.flagged).length,
      partial_export: extraction.partial || false,
      extraction_errors: extraction.errors || [],
      integrity_warnings: integrityWarnings,
      has_artifacts:  (extraction.artifactManifest || []).length > 0,
      artifact_count: (extraction.artifactManifest || []).length,
      ...((extraction.artifactManifest || []).length > 0 && {
        zip_filename: generateFilename(platform, 'zip'),
      }),
    },
    artifact_manifest: extraction.artifactManifest || [],
    conversation: extraction.turns.map((turn, index) => ({
      turn: index + 1,
      role: turn.role,
      content: turn.content,           // Raw content — no escaping in JSON
      classification_confidence: turn.confidence || null,
      classification_source: turn.classificationSource || 'manual',
      extraction_method: turn.extractionMethod || 'direct',
      ...(turn.timestamp && { timestamp: turn.timestamp }),
      ...(turn.flagged && { flagged: true, flag_reason: turn.flagReason }),
      artifacts: turn.artifacts || [],
    })),
  };

  return {
    json: JSON.stringify(exportData, null, 2),
    metadata: exportData.export_metadata,
    integrityWarnings,
    artifactManifest: extraction.artifactManifest || [],
    sidecarFiles:     extraction.sidecarFiles     || [],
  };
}

/**
 * Serialize extracted turns into Markdown format.
 * HTML entities are escaped in content to prevent tag contamination.
 *
 * @param {Object} extraction - Result from an extractor { turns, errors, partial }
 * @param {string} platform - Platform identifier (e.g., 'claude')
 * @returns {Object} { markdown: string, metadata: Object, integrityWarnings: string[] }
 */
function serializeToMarkdown(extraction, platform) {
  const integrityWarnings = runIntegrityChecks(extraction.turns);
  const exportTimestamp = new Date().toISOString().replace('T', ' ').slice(0, 19) + ' UTC';
  const platformName = platformToDisplayName(platform);

  // Build sidecar content lookup: sidecar_filename → content string.
  // Binary sidecars (Uint8Array, from binary_fetch) are excluded — rendering
  // binary bytes as Markdown text is meaningless, and their manifest entries
  // are handled by the non-code else branch below.
  const sidecarContentMap = new Map(
    (extraction.sidecarFiles || [])
      .filter(f => typeof f.content === 'string')
      .map(f => [f.filename, f.content])
  );
  // Build manifest lookup: `${artifact_id}|${version_number}` → version object
  const manifestVersionMap = new Map();
  for (const entry of (extraction.artifactManifest || [])) {
    for (const v of entry.versions) {
      manifestVersionMap.set(`${entry.artifact_id}|${v.version_number}`, {
        ...v,
        version_count: entry.version_count,
        canonical_type: entry.canonical_type,
      });
    }
  }

  const lines = [];

  // Header
  lines.push(`# Chat Export — ${platformName}`);
  lines.push(`**Exported:** ${exportTimestamp}  `);
  lines.push(`**Source:** ${window.location.href}  `);
  lines.push(`**Turns:** ${extraction.turns.length}`);

  if (extraction.partial) {
    lines.push(`\n> ⚠️ **Partial export** — some turns may be missing. Check JSON export for details.`);
  }

  lines.push('\n---\n');

  // Turns
  for (const turn of extraction.turns) {
    const roleLabel = turn.role === 'user' ? 'User' : 'Assistant';
    lines.push(`## ${roleLabel}`);

    if (turn.timestamp) {
      lines.push(`*${turn.timestamp}*\n`);
    }

    // v0.2.1: Escape HTML entities to prevent tag contamination in Markdown renderers.
    // Raw HTML in content (e.g. <style>, <div>, <script>) would otherwise cause
    // renderers to enter HTML mode, breaking all subsequent Markdown formatting.
    const safeContent = escapeHtmlForMarkdown(turn.content || '');
    lines.push(safeContent);

    if (turn.flagged) {
      lines.push(`\n> ⚠️ *Flagged: ${turn.flagReason || 'Unknown reason'}*`);
    }

    // Artifact blocks
    const CODE_TYPES = new Set([
      'shell', 'python', 'javascript', 'typescript', 'jsx', 'tsx',
      'css', 'json', 'yaml', 'sql', 'markdown', 'text',
      'c', 'cpp', 'rust', 'go', 'java', 'kotlin', 'swift',
      'ruby', 'php', 'r', 'dockerfile', 'makefile', 'terraform', 'powershell',
    ]);

    for (const ref of (turn.artifacts || [])) {
      const versionData = manifestVersionMap.get(`${ref.artifact_id}|${ref.version_number}`);
      if (!versionData) continue;

      const { canonical_type, version_number, version_count, sidecar_filename } = versionData;
      const title = ref.title;

      lines.push('');
      lines.push(`### Artifact: ${title}`);
      // sidecar_filename is null for browser_download artifacts — show expected filename instead
      const fileRef = sidecar_filename
        ? ` | **File:** \`${sidecar_filename}\``
        : (versionData.expected_filename
            ? ` | **Expected:** \`${versionData.expected_filename}\``
            : '');
      lines.push(`**Type:** ${canonical_type} | **Version:** ${version_number} of ${version_count}${fileRef}`);

      if (CODE_TYPES.has(canonical_type)) {
        const content = sidecarContentMap.get(sidecar_filename) || '';
        lines.push('');
        lines.push('```' + canonical_type);
        lines.push(escapeHtmlForMarkdown(content));
        lines.push('```');
      } else {
        // Non-code types: SVG, HTML, and binary formats (PPTX, DOCX, XLSX).
        // Content lives in the sidecar file rather than inline in Markdown.
        if (versionData.extraction_method === 'browser_download') {
          lines.push(
            `*Binary artifact downloaded to your Downloads folder — ` +
            `see \`binary-downloads-readme.txt\` for instructions.*`
          );
        } else {
          lines.push('*Content saved to sidecar file in zip archive.*');
        }
      }
    }

    lines.push('\n---\n');
  }

  // Footer
  lines.push(`*Exported by Chat Archive v${EXTENSION_VERSION}*`);

  const metadata = {
    source_platform: platformName,
    source_url: window.location.href,
    export_timestamp: new Date().toISOString(),
    extension_version: EXTENSION_VERSION,
    total_turns: extraction.turns.length,
    flagged_turns: extraction.turns.filter((t) => t.flagged).length,
    partial_export: extraction.partial || false,
    extraction_errors: extraction.errors || [],
    integrity_warnings: integrityWarnings,
  };

  return {
    markdown: lines.join('\n'),
    metadata,
    integrityWarnings,
    artifactManifest: extraction.artifactManifest || [],
    sidecarFiles:     extraction.sidecarFiles     || [],
  };
}

/**
 * Run integrity checks on the extracted turns before serialization.
 * These are sanity checks, not security enforcement.
 */
function runIntegrityChecks(turns) {
  const warnings = [];

  if (turns.length === 0) {
    warnings.push('No turns extracted');
    return warnings;
  }

  // Check 1: Turn alternation pattern
  let alternationViolations = 0;
  for (let i = 1; i < turns.length; i++) {
    if (turns[i].role === turns[i - 1].role) {
      alternationViolations++;
    }
  }
  if (alternationViolations > 0) {
    warnings.push(
      `${alternationViolations} consecutive same-role turn(s) detected. ` +
        'This may indicate missed turns or system messages.'
    );
  }

  // Check 2: Consecutive duplicate content
  for (let i = 1; i < turns.length; i++) {
    if (turns[i].content === turns[i - 1].content && turns[i].content.length > 0) {
      warnings.push(`Duplicate content detected between turns ${i} and ${i + 1}`);
    }
  }

  // Check 3: Suspiciously large turns
  const largeTurns = turns.filter((t) => t.content.length > SAFETY_LIMITS.MAX_SINGLE_TURN_SIZE);
  if (largeTurns.length > 0) {
    warnings.push(`${largeTurns.length} turn(s) exceed 100KB`);
  }

  // Check 4: Empty turns
  const emptyTurns = turns.filter((t) => !t.content || t.content.trim().length === 0);
  if (emptyTurns.length > 0) {
    warnings.push(`${emptyTurns.length} empty turn(s) detected`);
  }

  return warnings;
}

/**
 * Map platform ID to user-facing display name.
 */
function platformToDisplayName(platform) {
  const names = {
    claude: 'claude.ai',
    chatgpt: 'chatgpt.com',
    gemini: 'gemini.google.com',
    grok: 'grok.com',
    'grok-x': 'x.com/i/grok',
  };
  return names[platform] || platform;
}

// --- src/utils/filewriter.js ---
// =============================================================================
// Chat Archive — File Writer
// =============================================================================
// Writes serialized output to user's device via Chrome downloads API.
// Phase 2: JSON + Markdown.

/**
 * Generate a filename for the export.
 * Format: chat-export-{platform}-{YYYY-MM-DD-HHmmss}.{ext}
 */
function generateFilename(platform, format) {
  const now = new Date();
  const date = now.toISOString().replace(/[:.]/g, '-').slice(0, 19);
  return `chat-export-${platform}-${date}.${format}`;
}

/**
 * Download content as a file using the Chrome downloads API via background.js.
 */
function downloadViaBackground(content, filename, mimeType, isBase64 = false) {
  return new Promise((resolve, reject) => {
    chrome.runtime.sendMessage(
      {
        action: 'download',
        content,
        filename,
        mimeType,
        isBase64,
      },
      (response) => {
        if (chrome.runtime.lastError) {
          reject(new Error(chrome.runtime.lastError.message));
        } else if (response && response.success) {
          resolve(response);
        } else {
          reject(new Error(response?.error || 'Download failed'));
        }
      }
    );
  });
}

/**
 * Fallback: Download via Blob URL and <a> click.
 */
function downloadViaBlob(content, filename, mimeType) {
  const blob = new Blob([content], { type: mimeType });
  const url = URL.createObjectURL(blob);
  const a = document.createElement('a');
  a.href = url;
  a.download = filename;
  document.body.appendChild(a);
  a.click();
  document.body.removeChild(a);
  URL.revokeObjectURL(url);
}

/**
 * Download a file with fallback from background API to blob.
 */
async function downloadFile(content, filename, mimeType) {
  try {
    await downloadViaBackground(content, filename, mimeType);
  } catch (err) {
    console.warn('[Chat Archive] Background download failed, trying blob fallback:', err);
    downloadViaBlob(content, filename, mimeType);
  }
}

/**
 * Fallback: decode a base64 zip string to a Blob and trigger download via <a> click.
 * Used when background message passing fails for zip downloads.
 */
function downloadZipViaBlob(base64, filename) {
  try {
    const binary = atob(base64);
    const bytes  = new Uint8Array(binary.length);
    for (let i = 0; i < binary.length; i++) {
      bytes[i] = binary.charCodeAt(i);
    }
    const blob = new Blob([bytes], { type: 'application/zip' });
    const url  = URL.createObjectURL(blob);
    const a    = document.createElement('a');
    a.href     = url;
    a.download = filename;
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    URL.revokeObjectURL(url);
  } catch (err) {
    console.error('[Chat Archive] Zip blob fallback also failed:', err);
  }
}

/**
 * Add a binary file (Uint8Array) to a JSZip folder.
 * Convenience wrapper — keeps binary handling explicit at call sites.
 *
 * @param {JSZip}      folder    - JSZip folder object
 * @param {string}     filename  - Filename within the folder
 * @param {Uint8Array} uint8array - Binary content
 */
function addBinaryToZip(folder, filename, uint8array) {
  folder.file(filename, uint8array, { binary: true });
}

/**
 * Download a JSZip instance as a .zip file.
 *
 * Zip binary data cannot cross Chrome message passing as-is — the channel is
 * JSON-only. We generate the zip as base64 (a plain string), send it to
 * background.js with isBase64: true, where atob() decodes it back to binary
 * before creating the Blob. Falls back to direct blob creation in the content
 * script if background messaging fails.
 *
 * @param {JSZip}  zipObj   - Assembled JSZip instance (all files already added)
 * @param {string} filename - Suggested filename shown in the download dialog
 */
async function downloadZip(zipObj, filename) {
  const base64 = await zipObj.generateAsync({ type: 'base64' });

  try {
    await downloadViaBackground(base64, filename, 'application/zip', true);
  } catch (err) {
    console.warn('[Chat Archive] Background zip download failed, trying blob fallback:', err);
    downloadZipViaBlob(base64, filename);
  }
}

// --- src/content.js ---
// =============================================================================
// Chat Archive — Content Script
// =============================================================================
// Injected into AI chat platform pages. Orchestrates extraction pipeline.
// Phase 1: Claude.ai only, direct text extraction, JSON + Markdown export.

// Listen for messages from the popup
chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
  if (message.action === 'detect') {
    const platform = detectPlatform();
    sendResponse({ platform, supported: platform !== null });
    return;
  }

  if (message.action === 'extract') {
    handleExtraction(message.options || {})
      .then((result) => sendResponse(result))
      .catch((err) => sendResponse({ success: false, error: err.message }));
    return true; // Keep channel open for async
  }

  if (message.action === 'ping') {
    sendResponse({ alive: true });
    return;
  }
});

/**
 * Main extraction pipeline.
 */
async function handleExtraction(options) {
  const platform = detectPlatform();
  if (!platform) {
    return { success: false, error: 'Not on a supported chat platform' };
  }

  const format = options.format || 'json'; // 'json' | 'markdown'
  console.log(`[Chat Archive] Starting extraction for platform: ${platform}, format: ${format}`);
  const startTime = Date.now();

  let extraction;

  try {
    switch (platform) {
      case 'claude':
        extraction = await extractClaudeConversation();
        break;
      case 'chatgpt':
        extraction = await extractChatGPTConversation();
        break;
      case 'gemini':
        extraction = await extractGeminiConversation();
        break;
      case 'grok':
        extraction = await extractGrokConversation();
        break;
      case 'grok-x':
        extraction = await extractGrokXConversation();
        break;
      default:
        return {
          success: false,
          error: `Platform "${platform}" extraction not yet implemented.`,
        };
    }
  } catch (err) {
    console.error('[Chat Archive] Extraction failed:', err);
    return { success: false, error: `Extraction failed: ${err.message}` };
  }

  if (!extraction || extraction.turns.length === 0) {
    return {
      success: false,
      error: 'No conversation turns found. Is there a conversation on this page?',
      errors: extraction?.errors || [],
    };
  }

  // Serialize — JSON always (canonical format; required for zip when artifacts present).
  // Markdown serialized additionally only if the user requested that format.
  const jsonResult = serializeToJSON(extraction, platform);
  const mdResult   = format === 'markdown' ? serializeToMarkdown(extraction, platform) : null;

  const hasArtifacts = jsonResult.artifactManifest.length > 0;

  if (hasArtifacts) {
    // Build zip: conversation.json + optional conversation.md + artifact sidecars
    const zipFilename = generateFilename(platform, 'zip');
    const folderName  = zipFilename.replace(/\.zip$/, '');
    const zip         = new JSZip();
    const folder      = zip.folder(folderName);

    folder.file('conversation.json', jsonResult.json);

    if (mdResult) {
      folder.file('conversation.md', mdResult.markdown);
    }

    const artifactsFolder = folder.folder('artifacts');
    for (const sidecar of jsonResult.sidecarFiles) {
      if (sidecar.binary) {
        // Uint8Array binary content (PPTX, DOCX, XLSX from binary_fetch)
        artifactsFolder.file(sidecar.filename, sidecar.content, { binary: true });
      } else {
        artifactsFolder.file(sidecar.filename, sidecar.content);
      }
    }

    // Generate readme for any artifacts that fell back to browser_download.
    // These were cancelled by the background interceptor and re-triggered natively,
    // so the file is in the user's Downloads folder — not in the zip.
    const browserDownloadEntries = [];
    for (const entry of jsonResult.artifactManifest) {
      for (const v of entry.versions) {
        if (v.extraction_method === 'browser_download') {
          browserDownloadEntries.push({
            title:             entry.title,
            expected_filename: v.expected_filename || (entry.title + entry.versions[0]?.extension || ''),
            version_number:    v.version_number,
            artifact_id:       entry.artifact_id,
          });
        }
      }
    }

    if (browserDownloadEntries.length > 0) {
      const readmeLines = [
        'Binary Artifacts — Manual Download Required',
        '===========================================',
        '',
        'The following binary artifacts could not be automatically captured into the',
        'zip. They were downloaded to your Downloads folder by the browser. To complete',
        'your archive, move each file into the artifacts/ folder of this zip:',
        '',
        ...browserDownloadEntries.map(({ title, expected_filename, version_number, artifact_id }) =>
          `  ${expected_filename.padEnd(50)}  (${artifact_id} v${version_number} — "${title}")`
        ),
        '',
        'Alternatively, re-export the conversation. Binary fetch occasionally fails on',
        'the first attempt and succeeds on a second try.',
        '',
        `Generated by Chat Archive v${EXTENSION_VERSION}`,
      ];
      folder.file('binary-downloads-readme.txt', readmeLines.join('\n'));
    }

    await downloadZip(zip, zipFilename);
  } else {
    // No artifacts — download single file in the requested format
    if (format === 'markdown') {
      await downloadFile(mdResult.markdown, generateFilename(platform, 'md'), 'text/markdown');
    } else {
      await downloadFile(jsonResult.json, generateFilename(platform, 'json'), 'application/json');
    }
  }

  const elapsed = Date.now() - startTime;
  console.log(`[Chat Archive] Export complete: ${extraction.turns.length} turns in ${elapsed}ms`);

  return {
    success: true,
    metadata: {
      ...jsonResult.metadata,
      extraction_time_ms: elapsed,
      artifact_count: jsonResult.artifactManifest.length,
    },
    integrityWarnings: jsonResult.integrityWarnings,
  };
}
})();