// Extracted from newOS4 index.html — WebX11Terminal
        class WebX11Terminal {
            constructor() {
                this.outputContainer = document.getElementById('terminal-container');
                this.inputField = document.getElementById('command-input');
                this.dropdown = document.getElementById('autocomplete-dropdown');
                this.statusBar = document.getElementById('status-text');
                this.networkStatus = document.getElementById('network-status');
                this.fs = new VirtualFileSystem();
                this.secretVault = null;
                try {
                    if (typeof SecretVault !== 'undefined') {
                        this.secretVault = new SecretVault(this);
                        window.webx11_secretVault = this.secretVault;
                    }
                } catch (e) { console.warn('SecretVault init:', e.message); }
                this.moduleManager = new ModuleManager(this);
                this.ollamaManager = new OllamaManager(this);
                this._pipeInput = null;
                this._pipeBufferSize = 5000;
                this._historyBuffer = [];
                this._historyMaxLines = 50;
                this._historySavePending = false;
                this.MAX_OUTPUT_LINES = 200;
                this._aiBusy = false;
                this._dirty = false;
                this.history = JSON.parse(localStorage.getItem('webx11_command_history') || '[]');
                this.historyIndex = this.history.length;
                this.selectedSuggestion = -1;
                this.suggestions = [];
                this._isCdAutocomplete = false;
                this._autocompletePrefix = '';
                this.initEventListeners();
                this.updateNetworkStatus();
                this.loadBuiltInModules();
                this._loadHistory();
                // Auto-restore session
                this._autoRestoreSession();
                this._restoreFontSize();
                // Init auto-save timer — 60s after boot, then every 60s
                setTimeout(() => this._initAutoSave(), 30000);
                // Init sound toggle button text
                const soundBtn = document.getElementById('sound-toggle-btn');
                if (soundBtn) {
                    soundBtn.textContent = localStorage.getItem('webx11_config_ai_sound') === 'off' ? '🔇 Muted' : '🔊 Sound';
                }
                setTimeout(() => this.inputField.focus(), 100);
            }
            initEventListeners() {
                this.inputField.addEventListener('keydown', (e) => {
                    if (e.key === 'Enter' && !e.shiftKey) {
                        e.preventDefault();
                        if (this.selectedSuggestion >= 0 && this.suggestions[this.selectedSuggestion]) {
                            if (this._autocompletePrefix) {
                                this.inputField.value = this._autocompletePrefix + this.suggestions[this.selectedSuggestion];
                            } else if (!this._isCdAutocomplete) {
                                this.inputField.value = this.suggestions[this.selectedSuggestion];
                            }
                        }
                        const cmd = this.inputField.value;
                        this.history.push(cmd);
                        this.historyIndex = this.history.length;
                        this._saveCommandHistory();
                        this.executeCommand(cmd);
                        this.inputField.value = '';
                        this.inputField.style.height = 'auto';
                        this.hideAutocomplete();
                    } else if (e.key === 'ArrowUp') {
                        e.preventDefault();
                        if (this.historyIndex > 0) {
                            this.historyIndex--;
                            this.inputField.value = this.history[this.historyIndex];
                        }
                        this.hideAutocomplete();
                    } else if (e.key === 'ArrowDown') {
                        e.preventDefault();
                        if (this.historyIndex < this.history.length - 1) {
                            this.historyIndex++;
                            this.inputField.value = this.history[this.historyIndex];
                        } else {
                            this.historyIndex = this.history.length;
                            this.inputField.value = '';
                        }
                        this.hideAutocomplete();
                    } else if (e.key === 'Tab') {
                        e.preventDefault();
                        if (this.suggestions.length > 0) {
                            this.selectedSuggestion = (this.selectedSuggestion + 1) % this.suggestions.length;
                            this.updateAutocompleteDisplay();
                        }
                    } else if (e.key === 'Escape') {
                        if (this._aiBusy) {
                            this.executeCommand('ai-stop');
                        } else {
                            this.hideAutocomplete();
                        }
                    }
                });
                this.inputField.addEventListener('input', () => {
                    this.inputField.style.height = 'auto';
                    this.inputField.style.height = Math.min(this.inputField.scrollHeight, 120) + 'px';
                    this.showAutocomplete();
                });
                this.inputField.addEventListener('focus', () => {
                    this.showAutocomplete();
                });
                document.addEventListener('click', (e) => {
                    if (!e.target.closest('#input-area')) {
                        this.hideAutocomplete();
                    }
                });
                window.addEventListener('online', () => this.updateNetworkStatus());
                window.addEventListener('offline', () => this.updateNetworkStatus());
                document.getElementById('file-upload-input').addEventListener('change', (e) => {
                    const file = e.target.files[0];
                    if (file) {
                        const reader = new FileReader();
                        reader.onload = (evt) => {
                            this.fs.writeFile(file.name, evt.target.result);
                            this.markDirty();
                            this.print(`File '${file.name}' uploaded successfully.`, 'success');
                        };
                        reader.readAsText(file);
                    }
                    e.target.value = '';
                });
                // Voice mic button
                // Sound toggle button
                const soundBtn = document.getElementById('sound-toggle-btn');
                if (soundBtn) {
                    soundBtn.addEventListener('click', () => {
                        const current = localStorage.getItem('webx11_config_ai_sound');
                        if (current === 'off') {
                            localStorage.setItem('webx11_config_ai_sound', 'on');
                            soundBtn.textContent = '🔊 Sound';
                        } else {
                            localStorage.setItem('webx11_config_ai_sound', 'off');
                            soundBtn.textContent = '🔇 Muted';
                        }
                    });
                }
                // Mic toggle button
                const micToggleBtn = document.getElementById('voice-toggle-btn');
                if (micToggleBtn) {
                    micToggleBtn.addEventListener('click', () => this.toggleMicVisibility());
                }
            }
            updateNetworkStatus() {
                const isOnline = navigator.onLine;
                this.networkStatus.textContent = isOnline ? '📶 Online' : '❌ Offline';
                this.networkStatus.style.color = isOnline ? 'var(--text-color)' : 'var(--error-color)';
            }
            updatePrompt() {
                const path = '/' + this.fs.currentPath.join('/');
                const label = document.querySelector('.prompt-label');
                if (!label) return;
                if (localStorage.getItem('webx11_smart_prompt') === 'off') {
                    label.textContent = path === '/' ? '$' : path + ' $';
                    return;
                }
                const indicators = [];
                try {
                    const p = localStorage.getItem('webx11_user_profile');
                    if (p) { const pf = JSON.parse(p); if (pf.knownFacts && pf.knownFacts.name) indicators.push('👤' + pf.knownFacts.name); }
                } catch (e) {}
                try {
                    const idx = this.fs.fsReadJSON('/skills/index.json');
                    if (idx) { const c = Object.keys(idx).length; if (c > 0) indicators.push('📚' + c); }
                } catch (e) {}
                try {
                    const memIdx = this.fs.fsReadJSON('/memory/index.json');
                    if (memIdx) { const c = Object.keys(memIdx).length; if (c > 0) indicators.push('🧠' + c); }
                } catch (e) {}
                try {
                    if (performance.memory && performance.memory.usedJSHeapSize > 80 * 1048576) {
                        indicators.push('💾' + (performance.memory.usedJSHeapSize / 1048576).toFixed(0) + 'MB');
                    }
                } catch (e) {}
                try {
                    const md = this.fs.readDir('_mods');
                    if (md && md.content) { const e = Object.keys(md.content).filter(k => k.endsWith('.meta.json')); if (e.length > 0) indicators.push('⚡' + e.length); }
                } catch (e) {}
                const prefix = indicators.length ? indicators.join(' ') + ' ' : '';
                label.textContent = prefix + (path === '/' ? '$' : path + ' $');
            }
            print(text, type = '') {
                const line = document.createElement('div');
                line.className = `output-line ${type}`;
                line.textContent = text;
                this.outputContainer.appendChild(line);
                this._historyBuffer.push({ l: text, t: type });
                if (this._historyBuffer.length > this._historyMaxLines) {
                    this._historyBuffer.shift();
                }
                this._saveHistory();
                this.scrollToBottom();
                this._trimOutput();
            }
            printAIResponse(text) {
                const wrapper = document.createElement('div');
                wrapper.className = 'output-line ollama';
                const safeText = text.replace(/</g, "&lt;").replace(/>/g, "&gt;");
                wrapper.innerHTML = `
                    <button class="copy-btn" onclick="webx11.copyToClipboard(this)">Copy</button>
                    <div class="ai-content">${safeText}</div>
                `;
                this.outputContainer.appendChild(wrapper);
                this.scrollToBottom();
                this._trimOutput();
            }
            printStreamingResponse(text, append) {
                if (!append) {
                    const safeText = text.replace(/</g, "&lt;").replace(/>/g, "&gt;");
                    const wrapper = document.createElement('div');
                    wrapper.className = 'output-line ollama';
                    wrapper.innerHTML = `
                        <button class="copy-btn" onclick="webx11.copyToClipboard(this)">Copy</button>
                        <div class="ai-content">${safeText}</div>
                    `;
                    this.outputContainer.appendChild(wrapper);
                } else {
                    const contentDiv = this.outputContainer.querySelector('.output-line.ollama:last-child .ai-content');
                    if (contentDiv) {
                        const safeText = text.replace(/</g, "&lt;").replace(/>/g, "&gt;");
                        contentDiv.textContent += safeText;
                    }
                }
                this.scrollToBottom();
                this._trimOutput();
            }
            copyToClipboard(btn) {
                const contentDiv = btn.nextElementSibling;
                const text = contentDiv.innerText;
                navigator.clipboard.writeText(text).then(() => {
                    const originalText = btn.textContent;
                    btn.textContent = 'Copied!';
                    setTimeout(() => { btn.textContent = originalText; }, 2000);
                }).catch(err => { console.error('Failed to copy: ', err); });
            }
            printClickable(items) {
                const line = document.createElement('div');
                line.className = 'output-line';
                items.forEach(f => {
                    const span = document.createElement('span');
                    const safeName = f.name.replace(/</g, '&lt;').replace(/>/g, '&gt;');
                    if (f.type === 'dir') {
                        span.className = 'clickable-dir';
                        span.textContent = '[dir]' + f.name + '/';
                        span.onclick = () => {
                            this.executeCommand('cd ' + f.name);
                            setTimeout(() => this.executeCommand('ls'), 50);
                        };
                    } else {
                        span.className = 'clickable-file';
                        span.textContent = ' ' + f.name;
                        span.onclick = () => this.executeCommand('cat ' + f.name);
                    }
                    line.appendChild(span);
                });
                this.outputContainer.appendChild(line);
                this.scrollToBottom();
            }
            printHTML(html) {
                const line = document.createElement('div');
                line.className = 'output-line';
                line.innerHTML = html;
                this.outputContainer.appendChild(line);
                this.scrollToBottom();
            }
            _loadHistory() {
                try {
                    const saved = localStorage.getItem('webx11_terminal_output');
                    if (!saved) return;
                    const entries = JSON.parse(saved);
                    if (!Array.isArray(entries)) return;
                    this._historyBuffer = entries.slice(-this._historyMaxLines);
                    // Check localStorage quota warning
                    let quotaWarned = false;
                    try {
                        const testKey = '_quota_test_' + Date.now();
                        localStorage.setItem(testKey, 'x'.repeat(1024));
                        localStorage.removeItem(testKey);
                    } catch (e) {
                        quotaWarned = true;
                    }
                    // Lazy-load history: render first 20 immediately, batch the rest
                    const batchSize = 20;
                    const toRender = entries.slice(-this._historyMaxLines);
                    const initial = toRender.slice(0, batchSize);
                    for (const entry of initial) {
                        const line = document.createElement('div');
                        line.className = `output-line ${entry.t || ''}`;
                        line.textContent = entry.l || '';
                        this.outputContainer.appendChild(line);
                    }
                    if (toRender.length > batchSize) {
                        const remaining = toRender.slice(batchSize);
                        const doBatch = (index) => {
                            if (index >= remaining.length) {
                                this.scrollToBottom();
                                return;
                            }
                            requestAnimationFrame(() => {
                                const end = Math.min(index + batchSize, remaining.length);
                                for (let i = index; i < end; i++) {
                                    const line = document.createElement('div');
                                    line.className = `output-line ${remaining[i].t || ''}`;
                                    line.textContent = remaining[i].l || '';
                                    this.outputContainer.appendChild(line);
                                }
                                doBatch(end);
                            });
                        };
                        doBatch(0);
                    } else {
                        this.scrollToBottom();
                    }
                    if (quotaWarned) {
                        const warnLine = document.createElement('div');
                        warnLine.className = 'output-line warning';
                        warnLine.textContent = '⚠ localStorage is near quota — history may be incomplete';
                        this.outputContainer.appendChild(warnLine);
                    }
                } catch (e) {
                    // Silently ignore corrupt history data
                }
            }
            _saveHistory() {
                if (this._historySavePending) return;
                this._historySavePending = true;
                setTimeout(() => {
                    this._historySavePending = false;
                    try {
                        const slice = this._historyBuffer.slice(-30);
                        localStorage.setItem('webx11_terminal_output', JSON.stringify(slice));
                    } catch (e) {
                        // Silently ignore storage errors (e.g. quota exceeded)
                    }
                }, 3000);
            }
            _saveCommandHistory() {
                try {
                    localStorage.setItem('webx11_command_history', JSON.stringify(this.history));
                } catch (e) {
                    // Silently ignore storage errors
                }
            }
            _trimOutput() {
                const container = this.outputContainer;
                while (container.children.length > this.MAX_OUTPUT_LINES) {
                    container.removeChild(container.firstChild);
                }
            }
            markDirty() {
                this._dirty = true;
            }
            _initAutoSave() {
                if (this._autoSaveTimer) return;
                this._autoSaveTimer = setInterval(() => {
                    // Auto-trim on memory pressure
                    try {
                        if (performance.memory && performance.memory.usedJSHeapSize > 80 * 1048576) {
                            const oldMax = this.MAX_OUTPUT_LINES;
                            this.MAX_OUTPUT_LINES = performance.memory.usedJSHeapSize > 120 * 1048576 ? 50 : 100;
                            this._trimOutput();
                            this.MAX_OUTPUT_LINES = oldMax;
                            this.print('🧹 Terminal trimmed (memory: ' + (performance.memory.usedJSHeapSize / 1048576).toFixed(0) + ' MB)', 'text-muted');
                        }
                    } catch (e) {}
                    if (!this._dirty) return;
                    this._autoSaveSession();
                    this._dirty = false;
                }, 180000);
            }
            _autoSaveSession() {
                try {
                    this.fs.mkdirRecursive('_sessions');
                    // Clone fsRoot and strip _sessions to prevent recursive nesting
                    var rootClone = JSON.parse(JSON.stringify(this.fs.root));
                    if (rootClone && rootClone.content && rootClone.content['_sessions']) {
                        delete rootClone.content['_sessions'];
                    }
                    const snapshot = {
                        type: 'session',
                        savedAt: new Date().toISOString(),
                        fsRoot: rootClone,
                        currentPath: this.fs.currentPath,
                        version: 1,
                        terminalLines: this._historyBuffer.slice(-50)
                    };
                    this.fs.writeFile('_sessions/_auto.json', JSON.stringify(snapshot, null, 2));
                    // Also persist AI context concurrently
                    try {
                        const ctx = localStorage.getItem('webx11_ai_context');
                        if (ctx) this.fs.writeFile('_sessions/_auto-context.json', ctx);
                    } catch (e) {}
                } catch (e) {
                    // Silently handle auto-save failures
                }
            }
            _autoRestoreSession() {
                try {
                    this.fs.mkdirRecursive('_sessions');
                    const autoSession = this.fs.readFile('_sessions/_auto.json');
                    if (autoSession) {
                        const data = JSON.parse(autoSession);
                        if (data && data.fsRoot) {
                            this.fs.root = data.fsRoot;
                            this.fs.currentPath = data.currentPath || [];
                            this.fs.saveToStorage();
                            this.print('↻ Auto-restored session from ' + (data.savedAt ? new Date(data.savedAt).toLocaleTimeString() : 'recent'), 'success');
                            // Defer AI context restoration (AI module loads after terminal init)
                            try {
                                const aiCtx = this.fs.readFile('_sessions/_auto-context.json');
                                if (aiCtx) {
                                    localStorage.setItem('webx11_ai_context', aiCtx);
                                }
                            } catch (e) {}
                        }
                    }
                } catch (e) {
                    // Silent on first boot — no auto-session yet
                }
            }
            scrollToBottom() {
                this.outputContainer.scrollTop = this.outputContainer.scrollHeight;
            }
            showAutocomplete() {
                const input = this.inputField.value;
                const trimmed = input.trim();
                const commands = this.moduleManager.getAllCommands();
                this.suggestions = [];
                this.selectedSuggestion = -1;
                this._isCdAutocomplete = false;
                
                if (trimmed.length === 0) {
                    this.hideAutocomplete();
                    return;
                }
                
                const parts = input.split(' ');
                const cmdPart = parts[0].toLowerCase();
                const lowerInput = input.toLowerCase();
                
                // Commands that take file/dir arguments for autocomplete
                const fileArgCommands = ['cat', 'preview', 'rm', 'rmdir', 'edit', 'view'];
                const dirArgCommands = ['ls', 'cd'];
                // Session commands that autocomplete from _sessions/*.json
                const sessionArgCommands = ['session-load', 'session-delete', 'session-export', 'session-save'];
                
                // If we have more than one word, we're past the command name — autocomplete file/dir/session names
                if (parts.length > 1 && parts[1].length > 0) {
                    const partial = parts.slice(1).join(' ');
                    const partialTrimmed = partial.trim();
                    
                    if (partialTrimmed === '..') {
                        this.hideAutocomplete();
                        return;
                    }
                    
                    // Determine if we should show session names, dirs only, or both
                    if (sessionArgCommands.includes(cmdPart)) {
                        this.fs.mkdirRecursive('_sessions');
                        const all = this.fs.ls('_sessions');
                        this.suggestions = all
                            .filter(e => e.type === 'file' && e.name.endsWith('.json'))
                            .map(e => e.name.replace('.json', ''))
                            .filter(n => n.startsWith(partialTrimmed));
                    } else if (cmdPart === 'cd' || cmdPart === 'rmdir' || dirArgCommands.includes(cmdPart)) {
                        // Dir-only commands
                        const entries = this.fs.ls().filter(f => f.type === 'dir');
                        this.suggestions = entries
                            .filter(e => e.name.startsWith(partialTrimmed))
                            .map(e => e.name + '/');
                    } else if (fileArgCommands.includes(cmdPart)) {
                        const all = this.fs.ls();
                        this.suggestions = all
                            .filter(e => e.name.startsWith(partialTrimmed))
                            .map(e => e.type === 'dir' ? e.name + '/' : e.name);
                    } else {
                        this.hideAutocomplete();
                        return;
                    }
                    
                    this._autocompletePrefix = cmdPart + ' ';
                    if (this.suggestions.length > 0) {
                        this._isCdAutocomplete = (cmdPart === 'cd' || cmdPart === 'rmdir');
                        this.renderAutocomplete();
                    } else {
                        this.hideAutocomplete();
                    }
                    return;
                }
                
                // Just typed a space after command — show all matching entries
                if (parts.length > 1) {
                    if (sessionArgCommands.includes(cmdPart)) {
                        this.fs.mkdirRecursive('_sessions');
                        const all = this.fs.ls('_sessions');
                        this.suggestions = all
                            .filter(e => e.type === 'file' && e.name.endsWith('.json'))
                            .map(e => e.name.replace('.json', ''));
                    } else if (cmdPart === 'cd' || cmdPart === 'rmdir' || dirArgCommands.includes(cmdPart)) {
                        const dirs = this.fs.ls().filter(f => f.type === 'dir');
                        this.suggestions = dirs.map(d => d.name + '/');
                    } else if (fileArgCommands.includes(cmdPart)) {
                        const all = this.fs.ls();
                        this.suggestions = all.map(e => e.type === 'dir' ? e.name + '/' : e.name);
                    } else {
                        this.hideAutocomplete();
                        return;
                    }
                    this._autocompletePrefix = cmdPart + ' ';
                    if (this.suggestions.length > 0) {
                        this._isCdAutocomplete = (cmdPart === 'cd' || cmdPart === 'rmdir');
                        this.renderAutocomplete();
                    } else {
                        this.hideAutocomplete();
                    }
                    return;
                }
                
                // Directory autocomplete for bare 'cd ' (no partial yet) — should be unreachable due to above block
                if (lowerInput.startsWith('cd ')) {
                    const dirs = this.fs.ls().filter(f => f.type === 'dir');
                    this.suggestions = dirs.map(d => d.name + '/');
                    if (this.suggestions.length > 0) {
                        this._isCdAutocomplete = true;
                        this.renderAutocomplete();
                    } else {
                        this.hideAutocomplete();
                    }
                    return;
                }
                
                // Command name autocomplete (first word only) — also clears any stale prefix
                this._autocompletePrefix = '';
                for (const cmd in commands) {
                    if (cmd.startsWith(cmdPart) && cmd !== cmdPart) {
                        this.suggestions.push(cmd);
                    }
                }
                
                if (this.suggestions.length > 0) {
                    this.renderAutocomplete();
                } else {
                    this.hideAutocomplete();
                }
            }
            renderAutocomplete() {
                this.dropdown.innerHTML = '';
                this.suggestions.forEach((item, index) => {
                    const div = document.createElement('div');
                    div.className = `autocomplete-item ${index === this.selectedSuggestion ? 'selected' : ''}`;
                    div.innerHTML = this._isCdAutocomplete
                        ? `<span class="cmd-name" style="color:var(--accent-color)">${item}</span>`
                        : `<span class="cmd-name">${item}</span>`;
                    div.onclick = () => {
                        if (this._autocompletePrefix) {
                            this.inputField.value = this._autocompletePrefix + item;
                        } else if (this._isCdAutocomplete) {
                            this.inputField.value = 'cd ' + item;
                        } else {
                            this.inputField.value = item + ' ';
                        }
                        this.hideAutocomplete();
                        this.inputField.focus();
                    };
                    this.dropdown.appendChild(div);
                });
                this.dropdown.style.display = 'block';
            }
            updateAutocompleteDisplay() {
                const items = this.dropdown.querySelectorAll('.autocomplete-item');
                items.forEach((item, index) => {
                    item.classList.toggle('selected', index === this.selectedSuggestion);
                });
                if (this.selectedSuggestion >= 0 && this.suggestions[this.selectedSuggestion]) {
                    if (this._autocompletePrefix) {
                        this.inputField.value = this._autocompletePrefix + this.suggestions[this.selectedSuggestion];
                    } else if (this._isCdAutocomplete) {
                        this.inputField.value = 'cd ' + this.suggestions[this.selectedSuggestion];
                    } else {
                        this.inputField.value = this.suggestions[this.selectedSuggestion] + ' ';
                    }
                }
            }
            hideAutocomplete() {
                this.dropdown.style.display = 'none';
                this.suggestions = [];
                this.selectedSuggestion = -1;
                this._isCdAutocomplete = false;
                this._autocompletePrefix = '';
            }
            loadBuiltInModules() {
                this._safeRegister('SystemModule', 'system');
                this._safeRegister('FileSystemModule', 'filesystem');
                this._safeRegister('ModuleManagerModule', 'module manager');
                this._safeRegister('OllamaModule', 'ollama');
                this._safeRegister('SearXNGModule', 'searxng search');
                this._safeRegister('ConfigManagerModule', 'config');
                this._safeRegister('WebX11AIAssistantModule', 'AI assistant');
                this._safeRegister('WebFetcherModule', 'web fetcher');
                this._safeRegister('WebXAIAliasModule', 'AI alias');
                this._safeRegister('SkillsModule', 'skills');
                this._safeRegister('SecretVault', 'secret vault');
                this.reloadPersistedModules();
                this._safeRegister('ChatStudioModule', 'chat studio');
            }
            _safeRegister(className, label) {
                let cls;
                try {
                    cls = eval(className);
                } catch (e) {
                    console.log(`[SafeRegister] Skipped ${label}: class not loaded (skipped in boot selection)`);
                    return;
                }
                if (typeof cls === 'undefined') {
                    console.log(`[SafeRegister] Skipped ${label}: class not defined`);
                    return;
                }
                try { this.moduleManager.registerModule(new cls()); }
                catch (e) { console.warn(`[SafeRegister] Skipped ${label}: ${e.message}`); }
            }
            async _loadExtModules(filterKeys) {
                const autoLoadKeys = filterKeys || ['calc', 'voice', 'cron', 'theme', 'wpm', 'mindmap', 'webdav', 'skill-pack-core', 'editor', 'diff', 'alias', 'finder'];
                try {
                    const res = await fetch('packages.json');
                    if (!res.ok) throw new Error(`HTTP ${res.status}`);
                    const index = await res.json();
                    for (const key of autoLoadKeys) {
                        const pkg = index.packages[key];
                        if (pkg) {
                            await this.moduleManager.loadModuleFromURL(pkg.url);
                        }
                    }
                } catch (err) {
                    this.print(`Failed to auto-load ext modules: ${err.message}`, 'error');
                }
            }
            async reloadPersistedModules() {
                const registry = this.moduleManager.moduleRegistry;
                const skipList = ['calc', 'voice', 'cron', 'theme', 'wpm', 'mindmap', 'webdav', 'skill-pack-core', 'editor', 'diff', 'alias', 'finder'];
                for (const mod of registry) {
                    if (mod.enabled && mod.url) {
                        // Skip ext modules — they load via _loadExtModules
                        const name = (mod.url.match(/(\w+)\.js/) || [])[1];
                        if (name && skipList.includes(name)) continue;
                        await this.moduleManager.loadModuleFromURL(mod.url);
                    }
                }
            }
            async executeCommand(rawInput) {
                if (!rawInput.trim()) return;
                this.markDirty();
                this.print(`webx11@module:~$ ${rawInput}`, 'command-prompt');
                const pipeParts = this.splitPipe(rawInput.trim());
                if (pipeParts.length > 1) {
                    await this.executePipeChain(pipeParts);
                    return;
                }
                const parts = rawInput.trim().split(/\s+/);
                const cmd = parts[0].toLowerCase();
                const args = parts.slice(1);
                if (cmd === 'startup-modules') {
                    this.openStartupModules();
                    return;
                }
                if (cmd === 'font-size' || cmd === 'setfont') {
                    this.setFontSize(args[0]);
                    return;
                }
                if (cmd === 'load-local' || cmd === 'loadlocal') {
                    this.loadLocalModule(args[0]);
                    return;
                }
                if (cmd === 'smart-prompt') {
                    const val = args[0] && args[0] === 'off' ? 'off' : 'on';
                    localStorage.setItem('webx11_smart_prompt', val);
                    this.print('Smart prompt ' + val, 'success');
                    this.updatePrompt();
                    return;
                }
                if (cmd === 'mem') {
                    this.printMemoryStats();
                    return;
                }
                if (cmd === 'clear') {
                    this.outputContainer.innerHTML = '';
                    this._historyBuffer = [];
                    localStorage.removeItem('webx11_terminal_output');
                    return;
                }
                let executed = false;
                for (const modName in this.moduleManager.modules) {
                    const mod = this.moduleManager.modules[modName];
                    if (mod.commands && mod.commands[cmd]) {
                        try {
                            await mod.commands[cmd](args);
                            executed = true;
                        } catch (err) {
                            this.print(`Error in ${modName}.${cmd}: ${err.message}`, 'error');
                        }
                        break;
                    }
                }
                if (!executed) {
                    // Route unknown commands to the AI agent
                    try {
                        const aiMod = this.moduleManager.modules['WebX11AIAssistantModule'];
                        if (aiMod) {
                            this.print('→', 'info');
                            await aiMod.chat([rawInput.trim()]);
                            return;
                        }
                    } catch (e) {
                        this.print(`Agent error: ${e.message}`, 'error');
                        return;
                    }
                }
            }
            splitPipe(input) {
                const parts = [];
                let current = '';
                let inQuote = false;
                for (const ch of input) {
                    if (ch === '"' || ch === "'") { inQuote = !inQuote; current += ch; }
                    else if (ch === '|' && !inQuote) { parts.push(current.trim()); current = ''; }
                    else { current += ch; }
                }
                parts.push(current.trim());
                return parts;
            }
            async executePipeChain(pipeParts) {
                let pipeInput = null;
                for (let i = 0; i < pipeParts.length; i++) {
                    const cmdText = pipeParts[i];
                    const parts = cmdText.split(/\s+/);
                    const cmd = parts[0].toLowerCase();
                    const args = parts.slice(1);
                    this._pipeInput = pipeInput;
                    if (i < pipeParts.length - 1) {
                        pipeInput = await this.capturePipeOutput(cmd, args);
                    } else {
                        await this.dispatchCommand(cmd, args);
                    }
                }
                this._pipeInput = null;
            }
            async capturePipeOutput(cmd, args) {
                const originalPrint = this.print.bind(this);
                let output = '';
                this.print = (text, type) => { output += text + '\n'; };
                await this.dispatchCommand(cmd, args);
                this.print = originalPrint;
                const trimmed = output.trim();
                if (trimmed.length > this._pipeBufferSize) {
                    return trimmed.slice(0, this._pipeBufferSize);
                }
                return trimmed;
            }
            async dispatchCommand(cmd, args) {
                if (cmd === 'clear') { this.outputContainer.innerHTML = ''; this._historyBuffer = []; localStorage.removeItem('webx11_terminal_output'); return; }
                for (const modName in this.moduleManager.modules) {
                    const mod = this.moduleManager.modules[modName];
                    if (mod.commands && mod.commands[cmd]) {
                        try { await mod.commands[cmd](args); return; }
                        catch (err) { this.print(`Error in ${modName}.${cmd}: ${err.message}`, 'error'); return; }
                    }
                }
                // Route unknown commands to the AI agent
                try {
                    const aiMod = this.moduleManager.modules['WebX11AIAssistantModule'];
                    if (aiMod) {
                        this.print('→ Routing to AI assistant...', 'info');
                        await aiMod.chat([cmd + ' ' + args.join(' ')]);
                        return;
                    }
                } catch (e) {
                    this.print(`Agent error: ${e.message}`, 'error');
                }
                this.print(`Command not found: ${cmd}`, 'error');
            }
            openFileBrowser() {
                const modal = document.getElementById('file-browser');
                const content = document.getElementById('fb-content');
                content.innerHTML = '';
                const files = this.fs.ls();
                if (files.length === 0) {
                    content.innerHTML = '<div class="text-center" style="padding:20px; color:#666">Directory Empty</div>';
                } else {
                    files.forEach(f => {
                        const div = document.createElement('div');
                        div.className = `file-item ${f.type === 'dir' ? 'dir' : ''}`;
                        div.innerHTML = `<span>${f.type === 'dir' ? '📁' : '📄'} ${f.name}</span> <span style="font-size:0.8em">${f.size}b</span>`;
                        div.onclick = () => {
                            if (f.type === 'file') {
                                const content = this.fs.readFile(f.name);
                                this.print(`--- ${f.name} ---`);
                                this.print(content);
                                this.print('--- End ---');
                                this.closeFileBrowser();
                            }
                        };
                        content.appendChild(div);
                    });
                }
                modal.style.display = 'flex';
            }
            closeFileBrowser() {
                document.getElementById('file-browser').style.display = 'none';
                this.inputField.focus();
            }
            openModuleManager() {
                const modal = document.getElementById('module-manager');
                this.renderModuleList();
                modal.style.display = 'flex';
            }
            closeModuleManager() {
                document.getElementById('module-manager').style.display = 'none';
                this.inputField.focus();
            }
            renderModuleList() {
                const list = document.getElementById('module-list');
                list.innerHTML = '';
                const modules = this.moduleManager.getModuleList();
                if (modules.length === 0) {
                    list.innerHTML = '<div class="text-center" style="padding:20px; color:#666">No modules loaded</div>';
                    return;
                }
                modules.forEach(mod => {
                    const div = document.createElement('div');
                    div.className = `module-item ${mod.loaded ? '' : 'disabled'}`;
                    const badge = mod.url ? '' : '<span class="module-badge builtin">Built-in</span>';
                    div.innerHTML = `
                        <div>
                            <strong>${mod.name}</strong>${badge}
                            <div style="font-size:0.8em; color:#666">${mod.url || 'Built-in'}</div>
                        </div>
                        ${mod.url ? `<button class="btn btn-danger" onclick="webx11.removeModule('${mod.name}')" style="padding:4px 8px;">✕</button>` : ''}
                    `;
                    list.appendChild(div);
                });
            }
            async loadModuleFromURL() {
                const url = document.getElementById('module-url-input').value.trim();
                if (!url) { alert('Please enter a URL'); return; }
                const success = await this.moduleManager.loadModuleFromURL(url);
                if (success) {
                    document.getElementById('module-url-input').value = '';
                    this.renderModuleList();
                }
            }
            removeModule(name) {
                if (this.moduleManager.unregisterModule(name)) {
                    this.print(`Module '${name}' removed`, 'success');
                    this.renderModuleList();
                }
            }
            clearAllModules() {
                if (confirm('Remove all custom modules? Built-in modules will remain.')) {
                    this.moduleManager.clearAll();
                    this.renderModuleList();
                    this.print('All custom modules cleared', 'success');
                }
            }
            openOllamaManager() {
                const modal = document.getElementById('ollama-manager');
                document.getElementById('ollama-endpoint').value = this.ollamaManager.endpoint;
                this.updateOllamaStatus();
                this.renderOllamaModels();
                modal.style.display = 'flex';
            }
            closeOllamaManager() {
                document.getElementById('ollama-manager').style.display = 'none';
                this.inputField.focus();
            }
            openPreview(args) {
                let path = '';
                if (typeof args === 'string') path = args.trim();
                else if (Array.isArray(args)) path = args.join(' ').trim();
                if (!path) {
                    this.print('Usage: preview <file.html>', 'warning');
                    return;
                }
                // Remove leading slash for VFS paths
                const vfsPath = path.replace(/^\/*/, '');
                let content = this.fs.readFile(vfsPath);
                if (content === null) content = this.fs.fsRead('/' + vfsPath);
                if (content === null) {
                    this.print(`File not found: ${path}`, 'error');
                    return;
                }
                // Use srcdoc instead of blob URL — works reliably on mobile browsers
                const iframe = document.getElementById('preview-iframe');
                iframe.srcdoc = content;
                document.getElementById('preview-title').textContent = `📄 ${path}`;
                document.getElementById('preview-modal').style.display = 'flex';
            }
            closePreview() {
                document.getElementById('preview-modal').style.display = 'none';
                const iframe = document.getElementById('preview-iframe');
                iframe.srcdoc = '';
                iframe.src = 'about:blank';
                this.inputField.focus();
            }
            openSkillsManager() {
                const modal = document.getElementById('skills-manager');
                // Ensure /skills/ directory exists
                const skillsMod = this.moduleManager.modules['SkillsModule'];
                if (skillsMod && skillsMod.ensureSkillsDir) skillsMod.ensureSkillsDir();
                this.refreshSkillsList();
                modal.style.display = 'flex';
            }
            closeSkillsManager() {
                document.getElementById('skills-manager').style.display = 'none';
                this.inputField.focus();
            }
            openConfigManager() {
                document.getElementById('config-manager').style.display = 'flex';
                this.renderConfigList();
            }
            closeConfigManager() {
                document.getElementById('config-manager').style.display = 'none';
                this.inputField.focus();
            }
            renderConfigList() {
                const list = document.getElementById('config-list');
                if (!list) return;
                const prefix = 'webx11_config_';
                const entries = [];
                for (let i = 0; i < localStorage.length; i++) {
                    const key = localStorage.key(i);
                    if (key && key.startsWith(prefix)) {
                        entries.push({ key: key.replace(prefix, ''), value: localStorage.getItem(key) });
                    }
                }
                if (entries.length === 0) {
                    list.innerHTML = '<div style="padding:20px; text-align:center; color:#666">No configuration saved.</div>';
                    return;
                }
                list.innerHTML = entries.map(e => {
                    const displayVal = e.key.toLowerCase().includes('password') || e.key.toLowerCase().includes('token') || e.key.toLowerCase().includes('secret')
                        ? '****' : e.value;
                    return `<div class="module-item">
                        <div><strong>${e.key}</strong> <span style="color:var(--text-muted)">${displayVal}</span></div>
                        <button class="btn btn-danger" onclick="webx11.deleteConfigFromUI('${e.key.replace(/'/g, "\\'")}')" style="padding:4px 8px; font-size:0.8em">✕</button>
                    </div>`;
                }).join('');
            }
            addConfigFromUI() {
                const key = document.getElementById('config-key-input').value.trim();
                const value = document.getElementById('config-value-input').value.trim();
                if (!key || !value) {
                    this.print('Enter both key and value', 'warning');
                    return;
                }
                localStorage.setItem('webx11_config_' + key, value);
                document.getElementById('config-key-input').value = '';
                document.getElementById('config-value-input').value = '';
                this.print(`Config saved: ${key} = ${value}`, 'success');
                this.renderConfigList();
            }
            deleteConfigFromUI(key) {
                localStorage.removeItem('webx11_config_' + key);
                this.print(`Config '${key}' deleted`, 'success');
                this.renderConfigList();
            }
            exportConfigFromUI() {
                const mod = this.moduleManager.modules['ConfigManagerModule'];
                if (mod && mod.commands && mod.commands['config-export']) {
                    mod.commands['config-export']();
                }
            }
            resetConfigFromUI() {
                const mod = this.moduleManager.modules['ConfigManagerModule'];
                if (mod && mod.commands && mod.commands['config-reset']) {
                    mod.commands['config-reset']();
                    this.renderConfigList();
                }
            }
            refreshSkillsList() {
                const list = document.getElementById('skills-list');
                list.innerHTML = '';
                const fs = this.fs;
                fs.mkdirRecursive('/skills');
                const index = fs.fsReadJSON('/skills/index.json') || {};
                const names = Object.keys(index);
                if (names.length === 0) {
                    list.innerHTML = '<div style="padding:20px; text-align:center; color:#666">No skills yet. Create one below!</div>';
                    return;
                }
                names.forEach(name => {
                    const s = index[name];
                    const tags = (s.tags || []).join(', ');
                    const div = document.createElement('div');
                    div.className = 'module-item';
                    div.innerHTML = `
                        <div>
                            <strong style="color:var(--success-color)">${name}</strong>
                            <div style="font-size:0.85em; color:#aaa">${s.description || ''}</div>
                            <div style="font-size:0.75em; color:#666">${s.category || 'general'}${tags ? ' · ' + tags : ''}</div>
                        </div>
                        <div style="display:flex;gap:4px">
                            <button class="btn" onclick="webx11.viewSkillUI('${name}')" style="padding:4px 8px; font-size:0.8em">👁</button>
                            <button class="btn btn-danger" onclick="webx11.deleteSkillUI('${name}')" style="padding:4px 8px; font-size:0.8em">✕</button>
                        </div>
                    `;
                    list.appendChild(div);
                });
            }
            viewSkillUI(name) {
                const fs = this.fs;
                const content = fs.fsRead(`/skills/${name}.md`);
                if (!content) { this.print(`Skill '${name}' not found`, 'error'); return; }
                document.getElementById('skill-preview-title').textContent = name;
                document.getElementById('skill-preview-content').textContent = content;
                document.getElementById('skill-preview').style.display = 'block';
            }
            closeSkillPreview() {
                document.getElementById('skill-preview').style.display = 'none';
            }
            deleteSkillUI(name) {
                if (!confirm(`Delete skill "${name}"?`)) return;
                const fs = this.fs;
                fs.mkdirRecursive('/skills');
                fs.fsWrite(`/skills/${name}.md`, '');
                const index = fs.fsReadJSON('/skills/index.json') || {};
                delete index[name];
                fs.fsWriteJSON('/skills/index.json', index);
                this.print(`Skill '${name}' deleted`, 'success');
                this.refreshSkillsList();
            }
            createSkillFromUI() {
                const name = document.getElementById('skill-name-input').value.trim().replace(/\s+/g, '-').toLowerCase();
                const description = document.getElementById('skill-desc-input').value.trim() || 'No description';
                const tags = document.getElementById('skill-tags-input').value.trim().split(',').map(t => t.trim()).filter(Boolean);
                const contentInput = document.getElementById('skill-content-input').value.trim();
                if (!name) { alert('Skill name is required'); return; }
                const fs = this.fs;
                fs.mkdirRecursive('/skills');
                if (fs.fsRead(`/skills/${name}.md`)) {
                    alert(`Skill '${name}' already exists. Delete it first or use skill-patch command.`);
                    return;
                }
                let content = contentInput || `---\nname: ${name}\ndescription: ${description}\ntags: [${tags.join(', ')}]\ncategory: general\n---\n## Steps\n1. (to be filled)\n`;
                if (!content.startsWith('---')) {
                    content = `---\nname: ${name}\ndescription: ${description}\ntags: [${tags.join(', ')}]\ncategory: general\n---\n${content}`;
                }
                fs.fsWrite(`/skills/${name}.md`, content);
                const index = fs.fsReadJSON('/skills/index.json') || {};
                index[name] = { name, description, category: 'general', tags };
                fs.fsWriteJSON('/skills/index.json', index);
                this.print(`Skill '${name}' created`, 'success');
                document.getElementById('skill-name-input').value = '';
                document.getElementById('skill-desc-input').value = '';
                document.getElementById('skill-tags-input').value = '';
                document.getElementById('skill-content-input').value = '';
                this.refreshSkillsList();
            }
            updateOllamaStatus() {
                const statusDiv = document.getElementById('ollama-status');
                const statusText = document.getElementById('ollama-status-text');
                if (this.ollamaManager.connected) {
                    statusDiv.className = 'ollama-status connected';
                    statusText.textContent = `Connected (${this.ollamaManager.models.length} models)`;
                } else {
                    statusDiv.className = 'ollama-status disconnected';
                    statusText.textContent = 'Disconnected';
                }
            }
            renderOllamaModels() {
                const container = document.getElementById('ollama-models');
                const select = document.getElementById('ollama-current-model');
                container.innerHTML = '';
                select.innerHTML = '<option value="">Select a model</option>';
                const models = this.ollamaManager.getModels();
                if (models.length === 0) {
                    container.innerHTML = '<div class="text-center" style="padding:20px; color:#666">Connect to see models</div>';
                    return;
                }
                models.forEach(model => {
                    const div = document.createElement('div');
                    div.className = 'model-item';
                    div.innerHTML = `<span>${model.name}</span><span style="font-size:0.8em; color:#666">${model.size ? (model.size / 1e9).toFixed(1) + 'GB' : ''}</span>`;
                    div.onclick = () => {
                        this.ollamaManager.setModel(model.name);
                        select.value = model.name;
                    };
                    container.appendChild(div);
                    const option = document.createElement('option');
                    option.value = model.name;
                    option.textContent = model.name;
                    if (model.name === this.ollamaManager.currentModel) { option.selected = true; }
                    select.appendChild(option);
                });
            }
            async connectOllama() {
                const endpoint = document.getElementById('ollama-endpoint').value.trim();
                this.ollamaManager.setEndpoint(endpoint);
                const success = await this.ollamaManager.connect();
                this.updateOllamaStatus();
                if (success) { this.renderOllamaModels(); }
            }
            setOllamaModel() {
                const select = document.getElementById('ollama-current-model');
                this.ollamaManager.setModel(select.value);
            }
            openStartupModules() {
                document.getElementById('startup-modules').style.display = 'flex';
                this.renderStartupModules();
            }
            closeStartupModules() {
                document.getElementById('startup-modules').style.display = 'none';
            }
            renderStartupModules() {
                const body = document.getElementById('startup-modules-body');
                const selected = (() => {
                    try {
                        const s = localStorage.getItem('webx11_startup_modules');
                        return s ? JSON.parse(s) : null;
                    } catch (e) { return null; }
                })();
                const isSel = (name) => !selected || selected.includes(name);
                body.innerHTML = '';

                const foundation = ['virtual-fs.js','module-manager.js','ollama-manager.js','terminal.js'];
                const builtin = [
                    'module-system.js','module-fs.js','module-modmgr.js','module-ollama.js',
                    'module-my.js','module-searxng.js','module-servermon.js','module-ollamamodels.js',
                    'module-config.js','module-simplegui.js','module-io.js','module-dynamicprompts.js',
                    'module-aiassist.js','module-aiasm.js','module-smartctx.js','module-duckduckgo.js',
                    'module-fetcher.js','module-skills.js','module-chatstudio.js'
                ];
                const extFiles = [
                    'calc.js','voice.js','cron.js','theme.js','wpm.js','mindmap.js','skill-pack-core.js'
                ];

                const addSection = (title) => {
                    const h = document.createElement('div');
                    h.className = 'mod-section-header';
                    h.textContent = title;
                    body.appendChild(h);
                };
                const addCard = (name, badge, isDisabled) => {
                    const card = document.createElement('div');
                    card.className = 'mod-card' + (isDisabled ? ' disabled' : '');
                    const label = document.createElement('label');
                    const cb = document.createElement('input');
                    cb.type = 'checkbox';
                    cb.checked = isDisabled || isSel(name);
                    cb.disabled = isDisabled;
                    cb.dataset.name = name;
                    const nameSpan = document.createElement('span');
                    nameSpan.className = 'mod-name';
                    nameSpan.textContent = name;
                    const badgeSpan = document.createElement('span');
                    badgeSpan.className = 'mod-badge' + (badge === 'foundation' ? ' foundation' : badge === 'ext' ? ' ext' : '');
                    badgeSpan.textContent = badge;
                    label.appendChild(cb);
                    label.appendChild(nameSpan);
                    card.appendChild(label);
                    card.appendChild(badgeSpan);
                    body.appendChild(card);
                };

                addSection('Foundation (always loaded)');
                foundation.forEach(n => addCard(n, 'foundation', true));

                addSection('Built-in modules');
                builtin.forEach(n => addCard(n, 'built-in', false));

                addSection('Extensions');
                extFiles.forEach(n => addCard(n, 'ext', false));
            }
            saveStartupModules() {
                const cbs = document.querySelectorAll('#startup-modules-body input[type="checkbox"]:not(:disabled)');
                const selected = [];
                cbs.forEach(cb => {
                    if (cb.checked) selected.push(cb.dataset.name);
                });
                try {
                    localStorage.setItem('webx11_startup_modules', JSON.stringify(selected));
                } catch (e) {
                    this.print('Failed to save startup modules', 'error');
                    return;
                }
                this.print('Startup modules saved, reloading...', 'success');
                setTimeout(() => location.reload(), 500);
            }
            openCodeEditor(name, url, code) {
                const modal = document.getElementById('code-editor');
                const title = document.getElementById('code-editor-title');
                const info = document.getElementById('code-editor-info');
                const ta = document.getElementById('code-editor-textarea');
                if (!modal || !ta) return;
                this._editingModule = { name: name, url: url };
                title.textContent = '📝 Edit: ' + name;
                info.textContent = 'Module: ' + name + (url ? ' | Source: ' + url : '');
                ta.value = code;
                modal.style.display = 'flex';
            }
            closeCodeEditor() {
                document.getElementById('code-editor').style.display = 'none';
                this._editingModule = null;
            }
            async loadLocalModule(path) {
                if (!path) {
                    this.print('Usage: load-local <path>', 'warning');
                    this.print('Loads a module from VFS (e.g. "load-local modules/ext/mindmap.js") or from URL', 'info');
                    return;
                }
                let code = this.fs.readFile(path);
                if (code === null) {
                    try {
                        const resp = await fetch(path);
                        if (!resp.ok) throw new Error('HTTP ' + resp.status);
                        code = await resp.text();
                    } catch (e) {
                        this.print('load-local: file not found in VFS or at URL: ' + path, 'error');
                        return;
                    }
                }
                try {
                    const el = document.createElement('script');
                    el.textContent = code;
                    el.onerror = () => this.print('load-local: failed to execute ' + path, 'error');
                    document.body.appendChild(el);
                    this.print('Module loaded from ' + path, 'success');
                } catch (e) {
                    this.print('load-local: error: ' + e.message, 'error');
                }
            }
            async saveCodeEditor() {
                const ta = document.getElementById('code-editor-textarea');
                const mod = this._editingModule;
                if (!mod || !ta) return;
                const code = ta.value;
                this.fs.writeFile('_mods/' + mod.name + '.js', code);
                if (!this.fs.readFile('_mods/' + mod.name + '.orig.js')) {
                    this.fs.writeFile('_mods/' + mod.name + '.orig.js', 'placeholder');
                }
                this.fs.writeFile('_mods/' + mod.name + '.meta.json', JSON.stringify({
                    originalUrl: mod.url || '',
                    modifiedAt: new Date().toISOString(), editCount: 1
                }));
                try {
                    await this.moduleManager.loadModuleFromCode(code, 'blob://_mods/' + mod.name + '.js');
                    this.print('✅ Module loaded live from _mods/' + mod.name + '.js', 'success');
                } catch (e) {
                    this.print('⚠️ Auto-test failed: ' + e.message + ' — edits saved but module not loaded', 'error');
                }
                this.closeCodeEditor();
            }
            _restoreFontSize() {
                try {
                    const saved = localStorage.getItem('webx11_font_size');
                    if (saved) {
                        const s = parseInt(saved);
                        if (s >= 8 && s <= 32) document.documentElement.style.fontSize = s + 'px';
                    }
                } catch (e) {}
            }
            log(level, source, message) {
                const d = new Date();
                const ts = d.toISOString().split('T')[1].split('.')[0];
                const entry = `[${ts}][${level}][${source}] ${message}`;
                console.log(entry);
                // Write to VFS log
                try {
                    this.fs.mkdirRecursive('/logs');
                    let current = this.fs.readFile('/logs/current.log') || '';
                    current += entry + '\n';
                    const lines = current.split('\n').filter(l => l);
                    if (lines.length > 200) {
                        this.fs.writeFile('/logs/old.log', lines.slice(0, -100).join('\n'));
                        this.fs.writeFile('/logs/current.log', lines.slice(-100).join('\n'));
                    } else {
                        this.fs.writeFile('/logs/current.log', current);
                    }
                } catch (e) {}
            }
            setAiBusy(busy) {
                this._aiBusy = !!busy;
                if (this._aiBusyInterval) {
                    clearInterval(this._aiBusyInterval);
                    this._aiBusyInterval = null;
                }
                const cancelBtn = document.getElementById('ai-cancel-btn');
                if (busy) {
                    if (cancelBtn) cancelBtn.style.display = 'inline-block';
                    this._aiBusyStart = Date.now();
                    const updateTimer = () => {
                        let elapsed = Math.round((Date.now() - this._aiBusyStart) / 1000);
                        let sec = elapsed % 60;
                        let min = Math.floor(elapsed / 60);
                        this.statusBar.textContent = '🤖 AI Thinking... ⏱ ' + (min > 0 ? min + 'm ' : '') + sec + 's';
                        this.statusBar.className = 'loading';
                    };
                    updateTimer();
                    this._aiBusyInterval = setInterval(updateTimer, 1000);
                } else {
                    if (cancelBtn) cancelBtn.style.display = 'none';
                    this.statusBar.textContent = 'Ready';
                    this.statusBar.className = '';
                    this._aiBusyStart = 0;
                }
            }
            printMemoryStats() {
                const pm = typeof performance !== 'undefined' && performance.memory;
                let heapInfo = '';
                if (pm) {
                    const used = (pm.usedJSHeapSize / 1048576).toFixed(1);
                    const total = (pm.totalJSHeapSize / 1048576).toFixed(1);
                    const limit = (pm.jsHeapSizeLimit / 1048576).toFixed(1);
                    heapInfo = `JS heap: ${used}MB / ${total}MB (limit ${limit}MB)`;
                } else {
                    try {
                        const lsSize = (new Blob([JSON.stringify(localStorage)]).size / 1024).toFixed(1);
                        heapInfo = `localStorage: ${lsSize}KB`;
                    } catch (e) {
                        heapInfo = 'Memory API not available on this browser';
                    }
                }
                const output = [
                    `📊 Memory Stats`,
                    `  ${heapInfo}`,
                    `  Terminal lines in DOM: ${this.outputContainer.children.length}`,
                    `  History buffer: ${this._historyBuffer.length} entries`,
                    `  MAX_OUTPUT_LINES: ${this.MAX_OUTPUT_LINES}`,
                    `  Commands in history: ${this.history.length}`
                ].join('\n');
                this.print(output, 'info');
            }
            playNotificationSound() {
                if (localStorage.getItem('webx11_config_ai_sound') === 'off') return;
                try {
                    const ctx = new (window.AudioContext || window.webkitAudioContext)();
                    const osc = ctx.createOscillator();
                    const gain = ctx.createGain();
                    osc.connect(gain);
                    gain.connect(ctx.destination);
                    osc.frequency.value = 880;
                    osc.type = 'sine';
                    gain.gain.setValueAtTime(0.15, ctx.currentTime);
                    gain.gain.exponentialRampToValueAtTime(0.01, ctx.currentTime + 0.3);
                    osc.start(ctx.currentTime);
                    osc.stop(ctx.currentTime + 0.3);
                } catch (e) {}
            }
            toggleMicVisibility() {
                const voiceMod = this.moduleManager.modules['VoiceModule'];
                if (!voiceMod) {
                    this.print('Voice module not loaded', 'warning');
                    return;
                }
                if (voiceMod.listening) {
                    voiceMod.stopListening();
                } else {
                    voiceMod.handle([]);
                }
            }
            setFontSize(size) {
                const s = parseInt(size);
                if (isNaN(s) || s < 8 || s > 32) {
                    this.print('Usage: font-size <8-32>', 'warning');
                    return;
                }
                document.documentElement.style.fontSize = s + 'px';
                try { localStorage.setItem('webx11_font_size', String(s)); } catch (e) {}
                this.print('Font size set to ' + s + 'px', 'success');
            }
        }