// ==UserScript==
// @name         DeepSeek 对话批量管理
// @namespace    http://tampermonkey.net/
// @version      1.0.0
// @description  good！
// @author       Assistant
// @match        *://chat.deepseek.com/*
// @grant        GM_addStyle
// @grant        GM_setValue
// @grant        GM_getValue
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    // ==================== API 配置（不含硬编码凭据） ====================
    const API_CONFIG = {
        url: 'https://chat.deepseek.com/api/v0/chat_session/delete',
        method: 'POST',
        credentials: 'include',
        body: (sessionId) => ({ chat_session_id: sessionId }),
    };

    const CONFIG = {
        storageKey: 'ds_batch_v7',
        tokenStorageKey: 'ds_token_v7',
        toolbarPosition: 'top',
    };

    function sleep(ms) { return new Promise(r => setTimeout(r, ms)); }

    // ==================== Token 管理 ====================
    function getToken() {
        // 1. 尝试从 GM 存储读取
        let token = GM_getValue(CONFIG.tokenStorageKey, null);
        if (token) return token;

        // 2. 尝试从 Cookie 解析
        const cookies = document.cookie.split('; ');
        for (const cookie of cookies) {
            const [key, value] = cookie.split('=');
            if (key === 'token' || key === 'access_token' || key === 'session' || key === 'auth_token') {
                GM_setValue(CONFIG.tokenStorageKey, value);
                return value;
            }
        }

        // 3. 尝试从 localStorage 解析
        const storageKeys = ['token', 'access_token', 'session', 'auth_token'];
        for (const key of storageKeys) {
            const value = localStorage.getItem(key);
            if (value) {
                GM_setValue(CONFIG.tokenStorageKey, value);
                return value;
            }
        }

        // 4. 都没有，弹窗让用户手动输入
        const input = prompt(
            '未自动获取到 Token，请手动输入您的 Authorization Token（格式：Bearer xxxxx）\n\n' +
            '获取方法：\n' +
            '1. 打开 DeepSeek 页面，按 F12 打开开发者工具\n' +
            '2. 切换到 Network 标签，刷新页面\n' +
            '3. 点击任意请求，在 Request Headers 中找到 Authorization\n' +
            '4. 复制整个值（包括 Bearer 前缀）粘贴到下方'
        );
        if (input && input.trim() !== '') {
            const trimmed = input.trim();
            GM_setValue(CONFIG.tokenStorageKey, trimmed);
            return trimmed;
        }
        return null;
    }

    function clearToken() {
        GM_deleteValue(CONFIG.tokenStorageKey);
    }

    function getHeaders() {
        const token = getToken();
        if (!token) {
            alert('无法获取 Token，请手动输入。');
            return null;
        }
        return {
            'Content-Type': 'application/json',
            'Authorization': token,
        };
    }

    // ==================== 样式（精简） ====================
    GM_addStyle(`
        .ds-toolbar {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 16px;
            background: #f8f9fa;
            border-radius: 8px;
            margin: 8px 0;
            border: 1px solid #e9ecef;
            font-size: 13px;
            font-family: system-ui, sans-serif;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 999;
            backdrop-filter: blur(8px);
            background: rgba(248,249,250,0.95);
            flex-wrap: wrap;
        }
        .ds-toolbar .btn {
            padding: 4px 14px;
            border: 1px solid #d0d0d0;
            border-radius: 4px;
            background: white;
            cursor: pointer;
            font-size: 12px;
            transition: all 0.2s;
            color: #333;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .ds-toolbar .btn:hover { background: #f0f0f0; border-color: #b0b0b0; }
        .ds-toolbar .btn-primary { background: #4F46E5; border-color: #4F46E5; color: white; }
        .ds-toolbar .btn-primary:hover { background: #4338CA; }
        .ds-toolbar .stats {
            font-size: 12px;
            color: #666;
            margin-left: auto;
        }
        .ds-toolbar .stats strong { color: #333; }
        .ds-float-stats {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: rgba(0,0,0,0.8);
            color: white;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 13px;
            z-index: 9999;
            box-shadow: 0 4px 12px rgba(0,0,0,0.3);
            pointer-events: none;
            backdrop-filter: blur(4px);
            transition: opacity 0.3s;
        }
        .ds-float-stats.hidden { opacity: 0; transform: translateY(10px); }
        .ds-progress {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: 3px;
            background: #4F46E5;
            z-index: 99999;
            transition: width 0.3s;
            box-shadow: 0 0 10px rgba(79,70,229,0.5);
        }
        .ds-modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.6);
            z-index: 10000;
            display: flex;
            align-items: center;
            justify-content: center;
            animation: fadeIn 0.2s;
            pointer-events: auto;
        }
        .ds-modal {
            background: #fff;
            border-radius: 12px;
            max-width: 750px;
            width: 92%;
            max-height: 90vh;
            display: flex;
            flex-direction: column;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
            animation: slideUp 0.3s;
            pointer-events: auto;
            overflow: hidden;
        }
        .ds-modal-header {
            padding: 16px 24px;
            border-bottom: 1px solid #e9ecef;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-shrink: 0;
        }
        .ds-modal-header h3 {
            margin: 0;
            font-size: 18px;
            font-weight: 600;
            color: #1a1a1a;
        }
        .ds-modal-header .ds-modal-stats {
            font-size: 13px;
            color: #666;
        }
        .ds-modal-close {
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: #999;
            padding: 0 4px;
            line-height: 1;
            pointer-events: auto;
        }
        .ds-modal-close:hover { color: #333; }
        .ds-modal-body {
            padding: 12px 24px 16px 24px;
            overflow-y: auto;
            flex: 1;
            pointer-events: auto;
        }
        .ds-modal-body .ds-top-actions {
            margin-bottom: 12px;
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            align-items: center;
        }
        .ds-modal-body .ds-top-actions a {
            color: #4F46E5;
            cursor: pointer;
            text-decoration: underline;
            font-size: 13px;
        }
        .ds-modal-body .ds-top-actions a:hover { color: #4338CA; }
        .ds-modal-body .ds-item {
            display: flex;
            align-items: center;
            padding: 3px 0;
        }
        .ds-modal-body .ds-item:hover {
            background: #f5f7fa;
        }
        .ds-modal-body .ds-item label {
            cursor: pointer;
            flex: 1;
            font-size: 14px;
            color: #1a1a1a;
            padding: 4px 0;
            display: flex;
            align-items: center;
        }
        .ds-modal-body .ds-item input[type="checkbox"] {
            margin-right: 10px;
            flex-shrink: 0;
            width: 16px;
            height: 16px;
            cursor: pointer;
            pointer-events: auto;
        }
        .ds-modal-footer {
            padding: 12px 24px;
            border-top: 1px solid #e9ecef;
            display: flex;
            justify-content: flex-end;
            gap: 10px;
            flex-shrink: 0;
            flex-wrap: wrap;
        }
        .ds-modal-footer .btn {
            padding: 6px 18px;
            border-radius: 6px;
            border: 1px solid #ccc;
            background: #fff;
            cursor: pointer;
            font-size: 13px;
            pointer-events: auto;
        }
        .ds-modal-footer .btn-danger {
            background: #dc3545;
            border-color: #dc3545;
            color: white;
        }
        .ds-modal-footer .btn-danger:hover { background: #c82333; }
        .ds-modal-footer .btn-success {
            background: #28a745;
            border-color: #28a745;
            color: white;
        }
        .ds-modal-footer .btn-success:hover { background: #218838; }
        .ds-modal-footer .btn-secondary {
            background: #6c757d;
            border-color: #6c757d;
            color: white;
        }
        .ds-modal-footer .btn-secondary:hover { background: #5a6268; }
        .ds-modal-footer .btn-primary {
            background: #4F46E5;
            border-color: #4F46E5;
            color: white;
        }
        .ds-modal-footer .btn-primary:hover { background: #4338CA; }
        @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
        @keyframes slideUp { from { transform: translateY(30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
        @media (prefers-color-scheme: dark) {
            .ds-toolbar:not(.light) {
                background: rgba(30,30,35,0.95);
                border-color: #3d3d45;
                color: #e0e0e0;
            }
            .ds-toolbar:not(.light) .btn {
                background: #3d3d45;
                border-color: #555;
                color: #e0e0e0;
            }
            .ds-toolbar:not(.light) .btn:hover { background: #4d4d55; }
            .ds-toolbar:not(.light) .stats { color: #aaa; }
            .ds-toolbar:not(.light) .stats strong { color: #e0e0e0; }
            .ds-modal { background: #2d2d33; color: #e0e0e0; }
            .ds-modal-header { border-color: #3d3d45; }
            .ds-modal-header h3 { color: #e0e0e0; }
            .ds-modal-header .ds-modal-stats { color: #aaa; }
            .ds-modal-body .ds-item:hover { background: #3a3a42; }
            .ds-modal-body .ds-item label { color: #e0e0e0; }
            .ds-modal-footer { border-color: #3d3d45; }
            .ds-modal-footer .btn { background: #3d3d45; border-color: #555; color: #e0e0e0; }
            .ds-modal-footer .btn-danger { background: #dc3545; border-color: #dc3545; color: white; }
            .ds-modal-footer .btn-success { background: #28a745; border-color: #28a745; color: white; }
            .ds-modal-footer .btn-secondary { background: #6c757d; border-color: #6c757d; color: white; }
            .ds-modal-footer .btn-primary { background: #4F46E5; border-color: #4F46E5; color: white; }
            .ds-modal-close { color: #aaa; }
            .ds-modal-close:hover { color: #fff; }
            .ds-modal-body .ds-top-actions a { color: #818cf8; }
        }
    `);

    // ==================== 核心类 ====================
    class DeepSeekBatch {
        constructor() {
            this.items = [];
            this.selectedIds = new Set();
            this.toolbar = null;
            this.floatStats = null;
            this.isProcessing = false;
            this.observer = null;
            this.loadSelection();
            this.init();
        }

        init() {
            this.buildToolbar();
            this.scanItems();
            this.updateStats();
            this.showFloatStats();
            this.observeChanges();
            this.attachScrollListener();
        }

        scanItems() {
            const links = document.querySelectorAll('a[href*="/chat/"], a[href*="/c/"]');
            const items = [];
            const seen = new Set();
            links.forEach(link => {
                if (link.closest('[hidden]')) return;
                const id = this.getConversationId(link);
                if (!id) return;
                if (seen.has(id)) return;
                seen.add(id);
                const title = link.textContent.trim();
                if (!title) return;
                items.push({ link, title, id });
            });
            this.items = items;
            const validIds = new Set(items.map(item => item.id));
            for (const sid of this.selectedIds) {
                if (!validIds.has(sid)) {
                    this.selectedIds.delete(sid);
                }
            }
            this.saveSelection();
            this.updateStats();
        }

        getConversationId(link) {
            const href = link.getAttribute('href');
            if (!href) return null;
            const parts = href.split('/');
            const last = parts[parts.length - 1];
            if (last && last.length >= 30 && last.includes('-')) {
                return last;
            }
            return null;
        }

        // ==================== 删除 API（动态获取 Token） ====================
        async deleteItem(item) {
            const convId = item.id;
            if (!convId) return false;
            const headers = getHeaders();
            if (!headers) return false;

            try {
                const response = await fetch(API_CONFIG.url, {
                    method: API_CONFIG.method,
                    headers: headers,
                    credentials: API_CONFIG.credentials,
                    body: JSON.stringify(API_CONFIG.body(convId))
                });
                const data = await response.json();
                if (response.ok && data.code === 0) {
                    return true;
                } else if (response.status === 401) {
                    // Token 无效，清除存储并提示
                    clearToken();
                    alert('Token 已过期或无效，请重新输入。');
                    return false;
                } else {
                    return false;
                }
            } catch {
                return false;
            }
        }

        // -------- 其他方法（与之前相同，无变化）--------
        buildToolbar() {
            const old = document.querySelector('.ds-toolbar');
            if (old) old.remove();

            const toolbar = document.createElement('div');
            toolbar.className = 'ds-toolbar';
            toolbar.id = 'ds-toolbar';

            const selectBtn = document.createElement('button');
            selectBtn.className = 'btn btn-primary';
            selectBtn.textContent = '📋 选择对话并操作';
            selectBtn.addEventListener('click', () => this.openIntegratedModal());
            toolbar.appendChild(selectBtn);

            const stats = document.createElement('span');
            stats.className = 'stats';
            stats.id = 'ds-stats';
            stats.textContent = '共 0 个对话，已选 0 个';
            toolbar.appendChild(stats);

            const sidebar = document.querySelector('nav, aside, div[class*="sidebar"]');
            if (sidebar) {
                if (CONFIG.toolbarPosition === 'bottom') sidebar.appendChild(toolbar);
                else sidebar.insertBefore(toolbar, sidebar.firstChild);
            } else {
                document.body.insertBefore(toolbar, document.body.firstChild);
            }
            this.toolbar = toolbar;
        }

        openIntegratedModal() {
            this.scanItems();
            const items = this.items;
            if (items.length === 0) {
                alert('没有找到任何对话。');
                return;
            }

            const overlay = document.createElement('div');
            overlay.className = 'ds-modal-overlay';
            const modal = document.createElement('div');
            modal.className = 'ds-modal';

            const header = document.createElement('div');
            header.className = 'ds-modal-header';
            const titleH3 = document.createElement('h3');
            titleH3.textContent = '管理对话';
            header.appendChild(titleH3);
            const statsSpan = document.createElement('span');
            statsSpan.className = 'ds-modal-stats';
            statsSpan.id = 'ds-modal-stats';
            statsSpan.textContent = `已选 0 / ${items.length}`;
            header.appendChild(statsSpan);
            const closeBtn = document.createElement('button');
            closeBtn.className = 'ds-modal-close';
            closeBtn.textContent = '×';
            closeBtn.addEventListener('click', () => overlay.remove());
            header.appendChild(closeBtn);
            modal.appendChild(header);

            const body = document.createElement('div');
            body.className = 'ds-modal-body';

            const topActions = document.createElement('div');
            topActions.className = 'ds-top-actions';
            const selectAllLink = document.createElement('a');
            selectAllLink.textContent = '全选';
            selectAllLink.addEventListener('click', (e) => {
                e.preventDefault();
                const cbs = body.querySelectorAll('.ds-item input[type="checkbox"]');
                cbs.forEach(cb => { cb.checked = true; });
                this.updateModalStats(body, items.length);
            });
            topActions.appendChild(selectAllLink);
            const deselectAllLink = document.createElement('a');
            deselectAllLink.textContent = '全不选';
            deselectAllLink.style.marginLeft = '16px';
            deselectAllLink.addEventListener('click', (e) => {
                e.preventDefault();
                const cbs = body.querySelectorAll('.ds-item input[type="checkbox"]');
                cbs.forEach(cb => { cb.checked = false; });
                this.updateModalStats(body, items.length);
            });
            topActions.appendChild(deselectAllLink);
            body.appendChild(topActions);

            const listContainer = document.createElement('div');
            items.forEach(item => {
                const div = document.createElement('div');
                div.className = 'ds-item';
                const label = document.createElement('label');
                const cb = document.createElement('input');
                cb.type = 'checkbox';
                cb.checked = this.selectedIds.has(item.id);
                cb.dataset.id = item.id;
                cb.addEventListener('change', () => {
                    this.updateModalStats(body, items.length);
                });
                label.appendChild(cb);
                label.appendChild(document.createTextNode(item.title));
                div.appendChild(label);
                listContainer.appendChild(div);
            });
            body.appendChild(listContainer);
            modal.appendChild(body);

            const footer = document.createElement('div');
            footer.className = 'ds-modal-footer';

            const deleteBtn = document.createElement('button');
            deleteBtn.className = 'btn btn-danger';
            deleteBtn.textContent = '🗑 删除选中';
            deleteBtn.addEventListener('click', () => {
                const selected = this.getCheckedItems(body);
                if (selected.length === 0) { alert('请至少选择一个对话'); return; }
                this.modalDeleteSelected(selected, overlay);
            });
            footer.appendChild(deleteBtn);

            const exportBtn = document.createElement('button');
            exportBtn.className = 'btn btn-success';
            exportBtn.textContent = '📥 导出选中';
            exportBtn.addEventListener('click', () => {
                const selected = this.getCheckedItems(body);
                if (selected.length === 0) { alert('请至少选择一个对话'); return; }
                this.exportSelected(selected);
            });
            footer.appendChild(exportBtn);

            const clearBtn = document.createElement('button');
            clearBtn.className = 'btn btn-secondary';
            clearBtn.textContent = '🗑 清空全部';
            clearBtn.style.background = '#dc3545';
            clearBtn.style.borderColor = '#dc3545';
            clearBtn.style.color = 'white';
            clearBtn.addEventListener('click', () => {
                if (!confirm('确定删除全部对话吗？此操作不可撤销！')) return;
                const cbs = body.querySelectorAll('.ds-item input[type="checkbox"]');
                cbs.forEach(cb => { cb.checked = true; });
                const all = this.getCheckedItems(body);
                this.modalDeleteSelected(all, overlay);
            });
            footer.appendChild(clearBtn);

            const closeFooterBtn = document.createElement('button');
            closeFooterBtn.className = 'btn btn-primary';
            closeFooterBtn.textContent = '关闭';
            closeFooterBtn.addEventListener('click', () => overlay.remove());
            footer.appendChild(closeFooterBtn);

            modal.appendChild(footer);
            overlay.appendChild(modal);
            document.body.appendChild(overlay);

            this.updateModalStats(body, items.length);
            overlay.addEventListener('click', (e) => {
                if (e.target === overlay) overlay.remove();
            });
        }

        getCheckedItems(body) {
            const cbs = body.querySelectorAll('.ds-item input[type="checkbox"]:checked');
            const selected = [];
            cbs.forEach(cb => {
                const id = cb.dataset.id;
                const item = this.items.find(it => it.id === id);
                if (item) selected.push(item);
            });
            return selected;
        }

        updateModalStats(body, total) {
            const checked = body.querySelectorAll('.ds-item input[type="checkbox"]:checked').length;
            const statsSpan = document.getElementById('ds-modal-stats');
            if (statsSpan) statsSpan.textContent = `已选 ${checked} / ${total}`;
        }

        async modalDeleteSelected(selectedItems, overlay) {
            const titles = selectedItems.map(item => item.title);
            let msg = `确定删除选中的 ${selectedItems.length} 个对话吗？\n\n`;
            const max = 5;
            titles.slice(0, max).forEach((t, i) => msg += `${i+1}. ${t}\n`);
            if (titles.length > max) msg += `... 等 ${titles.length - max} 个`;
            if (!confirm(msg)) return;

            overlay.style.pointerEvents = 'none';
            this.isProcessing = true;
            this.showProgress(0, selectedItems.length);

            let deleted = 0, failed = 0;
            for (let i = 0; i < selectedItems.length; i++) {
                const item = selectedItems[i];
                try {
                    const success = await this.deleteItem(item);
                    if (success) {
                        deleted++;
                        const idx = this.items.indexOf(item);
                        if (idx > -1) this.items.splice(idx, 1);
                        this.selectedIds.delete(item.id);
                        const link = item.link;
                        if (link && link.parentElement) {
                            const parent = link.parentElement;
                            parent.style.transition = 'all 0.3s';
                            parent.style.opacity = '0';
                            parent.style.transform = 'translateX(-20px)';
                            setTimeout(() => parent.remove(), 300);
                        }
                    } else {
                        failed++;
                    }
                } catch {
                    failed++;
                }
                this.showProgress(i+1, selectedItems.length);
                await sleep(150);
            }

            this.hideProgress();
            this.isProcessing = false;
            overlay.style.pointerEvents = 'auto';

            this.saveSelection();
            this.updateStats();

            if (deleted > 0) {
                this.scanItems();
                const body = overlay.querySelector('.ds-modal-body');
                if (body) {
                    const listContainer = body.querySelector('div:not(.ds-top-actions)');
                    if (listContainer) listContainer.remove();
                    const newList = document.createElement('div');
                    this.items.forEach(item => {
                        const div = document.createElement('div');
                        div.className = 'ds-item';
                        const label = document.createElement('label');
                        const cb = document.createElement('input');
                        cb.type = 'checkbox';
                        cb.checked = this.selectedIds.has(item.id);
                        cb.dataset.id = item.id;
                        cb.addEventListener('change', () => {
                            this.updateModalStats(body, this.items.length);
                        });
                        label.appendChild(cb);
                        label.appendChild(document.createTextNode(item.title));
                        div.appendChild(label);
                        newList.appendChild(div);
                    });
                    body.appendChild(newList);
                    this.updateModalStats(body, this.items.length);
                }
                this.updateStats();
                this.updateFloatStats(this.items.length, this.selectedIds.size);
            }

            alert(`删除完成！成功: ${deleted}，失败: ${failed}`);
            // 强制刷新页面
            window.location.reload();
        }

        exportSelected(selectedItems) {
            if (!selectedItems) {
                selectedItems = this.items.filter(item => this.selectedIds.has(item.id));
            }
            if (selectedItems.length === 0) {
                alert('没有选中的对话');
                return;
            }
            const data = selectedItems.map(item => ({
                title: item.title,
                url: window.location.href,
                platform: 'DeepSeek',
                exportedAt: new Date().toISOString(),
            }));
            const json = JSON.stringify(data, null, 2);
            const blob = new Blob([json], { type: 'application/json' });
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = `deepseek_${new Date().toISOString().slice(0,10)}.json`;
            a.click();
            URL.revokeObjectURL(url);
        }

        updateStats() {
            const statsEl = document.getElementById('ds-stats');
            if (!statsEl) return;
            const total = this.items.length;
            const selected = this.selectedIds.size;
            statsEl.textContent = `共 ${total} 个对话，已选 ${selected} 个`;
            this.updateFloatStats(total, selected);
        }

        showFloatStats() {
            let el = document.getElementById('ds-float-stats');
            if (!el) {
                el = document.createElement('div');
                el.id = 'ds-float-stats';
                el.className = 'ds-float-stats';
                document.body.appendChild(el);
            }
            this.floatStats = el;
            this.updateStats();
        }
        updateFloatStats(total, selected) {
            if (!this.floatStats) return;
            this.floatStats.textContent = selected > 0 ? `📊 ${selected}/${total} 已选` : `📊 ${total} 个对话`;
            this.floatStats.classList.remove('hidden');
        }

        showProgress(current, total) {
            let el = document.getElementById('ds-progress');
            if (!el) {
                el = document.createElement('div');
                el.id = 'ds-progress';
                el.className = 'ds-progress';
                document.body.appendChild(el);
            }
            el.style.width = Math.round((current / total) * 100) + '%';
        }
        hideProgress() {
            const el = document.getElementById('ds-progress');
            if (el) { el.style.width = '0%'; setTimeout(() => el.remove(), 500); }
        }

        saveSelection() {
            GM_setValue(CONFIG.storageKey, JSON.stringify({ selected: Array.from(this.selectedIds) }));
        }
        loadSelection() {
            try {
                const raw = GM_getValue(CONFIG.storageKey, '{}');
                const data = JSON.parse(raw);
                if (data.selected) {
                    this.selectedIds = new Set(data.selected);
                }
            } catch {}
        }

        observeChanges() {
            if (this.observer) this.observer.disconnect();
            this.observer = new MutationObserver(() => {
                clearTimeout(this._scanTimer);
                this._scanTimer = setTimeout(() => {
                    this.scanItems();
                    this.updateStats();
                }, 500);
            });
            this.observer.observe(document.body, { childList: true, subtree: true });
        }

        attachScrollListener() {
            const scrollContainer = document.querySelector('nav, aside, div[class*="sidebar"]') || document;
            scrollContainer.addEventListener('scroll', () => {
                clearTimeout(this._scrollTimer);
                this._scrollTimer = setTimeout(() => {
                    this.scanItems();
                    this.updateStats();
                }, 300);
            }, { passive: true });
        }

        destroy() {
            if (this.observer) { this.observer.disconnect(); this.observer = null; }
            document.querySelector('.ds-toolbar')?.remove();
            document.getElementById('ds-float-stats')?.remove();
            document.getElementById('ds-progress')?.remove();
            document.querySelectorAll('.ds-modal-overlay').forEach(el => el.remove());
        }
    }

    // ==================== 启动 ====================
    let manager = null;

    function init() {
        if (manager) {
            manager.destroy();
            manager = null;
        }
        setTimeout(() => {
            try {
                manager = new DeepSeekBatch();
            } catch {}
        }, 300);
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }

    let lastUrl = location.href;
    setInterval(() => {
        if (location.href !== lastUrl) {
            lastUrl = location.href;
            setTimeout(init, 1000);
        }
    }, 2000);

    window.__DS_BATCH = { manager, init };
})();