study-lab/app.js
app.jsRaw
1(() => {
2 'use strict';
3
4 const APP_PREFIX = 'study-lab';
5 const STORAGE_KEY = `${APP_PREFIX}:v1`;
6 const SETTINGS_KEY = `${APP_PREFIX}:settings:v1`;
7 const USAGE_KEY = `${APP_PREFIX}:usage:v1`;
8 const OPENROUTER_PRICES_KEY = `${APP_PREFIX}:openrouter-prices:v1`;
9 const OPENAI_ADMIN_SESSION_KEY = `${APP_PREFIX}:openai-admin-key`;
10 const TREE_ZOOM_KEY = `${APP_PREFIX}:tree-zoom`;
11 const THEME_KEY = `${APP_PREFIX}:theme`;
12 const FILE_REQUEST_LIMIT = 50 * 1024 * 1024;
13 const PRICE_CACHE_TTL = 24 * 60 * 60 * 1000;
14 const PROVIDERS = {
15 openai: {
16 label: 'OpenAI', apiUrl: 'https://api.openai.com/v1/responses', model: 'gpt-5-mini',
17 models: ['gpt-5-mini', 'gpt-5', 'gpt-4.1-mini', 'gpt-4.1']
18 },
19 openrouter: {
20 label: 'OpenRouter', apiUrl: 'https://openrouter.ai/api/v1/responses', model: 'openai/gpt-5-mini',
21 models: ['openai/gpt-5-mini', 'anthropic/claude-sonnet-4', 'google/gemini-2.5-pro', 'deepseek/deepseek-r1']
22 }
23 };
24 // USD per million tokens. Last checked against OpenAI Docs on 2026-08-17.
25 const MODEL_PRICES = [
26 { match: /^gpt-5\.6-terra(?:-|$)/, input: 2, cached: .2, output: 12 },
27 { match: /^gpt-5\.6-luna(?:-|$)/, input: .2, cached: .02, output: 1.2 },
28 { match: /^gpt-5\.6-sol(?:-|$)/, input: 5, cached: .5, output: 30 },
29 { match: /^gpt-5\.6$/, input: 5, cached: .5, output: 30 },
30 { match: /^gpt-5\.4-mini(?:-|$)/, input: .75, cached: .075, output: 4.5 },
31 { match: /^gpt-5\.4(?:-20\d{2}|$)/, input: 2.5, cached: .25, output: 15 },
32 { match: /^gpt-5-mini(?:-|$)/, input: .25, cached: .025, output: 2 },
33 { match: /^gpt-5-nano(?:-|$)/, input: .05, cached: .005, output: .4 },
34 { match: /^gpt-5(?:-20\d{2}|$)/, input: 1.25, cached: .125, output: 10 },
35 { match: /^gpt-4\.1-mini(?:-|$)/, input: .4, cached: .1, output: 1.6 },
36 { match: /^gpt-4\.1(?:-20\d{2}|$)/, input: 2, cached: .5, output: 8 },
37 { match: /^gpt-4o-mini(?:-|$)/, input: .15, cached: .075, output: .6 }
38 ];
39 const DEFAULT_SETTINGS = {
40 activeModelId: 'model-openai',
41 apiKeys: { openai: '', openrouter: '' },
42 models: [{ id: 'model-openai', provider: 'openai', model: 'gpt-5-mini', apiUrl: 'https://api.openai.com/v1/responses' }],
43 systemPrompt: 'You are a patient technical tutor. Use clear Markdown and LaTeX where useful. Use mathematical language, assume graduate level knowledge. Build on the conversation context and explain assumptions.'
44 };
45
46 const $ = (selector, root = document) => root.querySelector(selector);
47 const els = {
48 welcome: $('#welcome'), conversation: $('#conversation'), composer: $('#composer'),
49 prompt: $('#prompt'), send: $('#send'), tree: $('#tree'), mapEmpty: $('#map-empty'),
50 nodeCount: $('#node-count'), branchCount: $('#branch-count'), branchContext: $('#branch-context'),
51 branchLabel: $('#branch-label'), selectionMenu: $('#selection-menu'), selectionPreview: $('#selection-preview'),
52 selectionAction: $('#selection-action'), selectionCustom: $('#selection-custom'), settings: $('#settings-dialog'),
53 openaiApiKey: $('#openai-api-key'), openrouterApiKey: $('#openrouter-api-key'), openaiAdminKey: $('#openai-admin-key'), modelConfigs: $('#model-configs'),
54 openaiModelOptions: $('#openai-model-options'), openrouterModelOptions: $('#openrouter-model-options'),
55 systemPrompt: $('#system-prompt'),
56 keyStatus: $('#key-status'), toast: $('#toast'), usageDialog: $('#usage-dialog'),
57 monthTokens: $('#month-tokens'), usageMonth: $('#usage-month'), usageTotal: $('#usage-total'),
58 usageCost: $('#usage-cost'), usageRequests: $('#usage-requests'), usageInput: $('#usage-input'),
59 usageCached: $('#usage-cached'), usageOutput: $('#usage-output'), usageModels: $('#usage-models'),
60 usageRecent: $('#usage-recent'), usageNote: $('#usage-note'), historyList: $('#history-list'),
61 actualOpenAICost: $('#actual-openai-cost'), actualOpenAIStatus: $('#actual-openai-status'),
62 actualOpenRouterCost: $('#actual-openrouter-cost'), actualOpenRouterStatus: $('#actual-openrouter-status'),
63 actualCombinedCost: $('#actual-combined-cost'), actualCombinedStatus: $('#actual-combined-status'),
64 historyEmpty: $('#history-empty'), historyToggle: $('#toggle-history'),
65 attachments: $('#attachments'), uploadFile: $('#upload-file'), fileInput: $('#file-input'),
66 activeConnection: $('#active-connection'), activeModel: $('#active-model'), activeProvider: $('#active-provider'),
67 conversationSearch: $('#conversation-search'), searchResults: $('#search-results'),
68 treeZoom: $('#tree-zoom'), shortcutsDialog: $('#shortcuts-dialog')
69 };
70
71 migrateLegacyStorage();
72 let settings = normalizeSettings(loadJSON(SETTINGS_KEY, DEFAULT_SETTINGS));
73 let settingsDraft = null;
74 let workspace = loadWorkspace();
75 let state = currentMap();
76 let usageRecords = loadUsage();
77 let openRouterPrices = loadOpenRouterPrices();
78 let activeRequest = null;
79 let uploadingFiles = false;
80 let uploadTargetMapId = null;
81 let selectedText = null;
82 let saveTimer = 0;
83 let toastTimer = 0;
84 let searchTimer = 0;
85 let searchIndex = null;
86 let pendingG = false;
87 let pendingGTimer = 0;
88 let treeZoom = loadTreeZoom();
89 let installPrompt = null;
90 let actualSpendRequest = 0;
91 let modelPriceTimer = 0;
92
93 function loadJSON(key, fallback) {
94 try { return JSON.parse(localStorage.getItem(key) || 'null') || fallback; }
95 catch { return { ...fallback }; }
96 }
97
98 function normalizeSettings(value = {}) {
99 const apiKeys = {
100 openai: String(value.apiKeys?.openai ?? value.profiles?.openai?.apiKey ?? value.apiKey ?? ''),
101 openrouter: String(value.apiKeys?.openrouter ?? value.profiles?.openrouter?.apiKey ?? '')
102 };
103 let sourceModels = Array.isArray(value.models) ? value.models : null;
104 if (!sourceModels?.length && value.profiles) {
105 sourceModels = Object.entries(PROVIDERS).map(([provider, defaults]) => ({
106 id: `model-${provider}`, provider, model: value.profiles[provider]?.model || defaults.model,
107 apiUrl: value.profiles[provider]?.apiUrl || defaults.apiUrl
108 }));
109 }
110 if (!sourceModels?.length) {
111 const provider = PROVIDERS[value.provider] ? value.provider : 'openai';
112 sourceModels = [{
113 id: 'model-openai', provider, model: value.model || PROVIDERS[provider].model,
114 apiUrl: value.apiUrl || PROVIDERS[provider].apiUrl
115 }];
116 }
117 const usedIds = new Set();
118 const models = sourceModels.map((saved, index) => {
119 const provider = PROVIDERS[saved?.provider] ? saved.provider : 'openai';
120 let id = String(saved?.id || `model-${index + 1}`);
121 while (usedIds.has(id)) id = `${id}-${index + 1}`;
122 usedIds.add(id);
123 return {
124 id, provider, model: String(saved?.model || PROVIDERS[provider].model),
125 apiUrl: String(saved?.apiUrl || PROVIDERS[provider].apiUrl)
126 };
127 });
128 const legacyActive = models.find(model => model.provider === value.provider)?.id;
129 const activeModelId = models.some(model => model.id === value.activeModelId)
130 ? value.activeModelId : (legacyActive || models[0].id);
131 const active = models.find(model => model.id === activeModelId) || models[0];
132 return {
133 activeModelId, apiKeys, models, provider: active.provider, apiKey: apiKeys[active.provider],
134 model: active.model, apiUrl: active.apiUrl,
135 systemPrompt: String(value.systemPrompt ?? DEFAULT_SETTINGS.systemPrompt)
136 };
137 }
138
139 function providerLabel(provider = settings.provider) {
140 return PROVIDERS[provider]?.label || 'API provider';
141 }
142
143 function requestHeaders(json = false, connection = settings) {
144 const headers = { 'Authorization': `Bearer ${connection.apiKey}` };
145 if (json) headers['Content-Type'] = 'application/json';
146 if (connection.provider === 'openrouter') headers['X-OpenRouter-Title'] = 'Study Lab';
147 return headers;
148 }
149
150 function migrateLegacyStorage() {
151 const legacyPrefix = ['study', 'pal'].join('-');
152 const suffixes = [':v1', ':settings:v1', ':usage:v1', ':theme', ':tree-zoom'];
153 for (const suffix of suffixes) {
154 const currentKey = `${APP_PREFIX}${suffix}`;
155 const legacyKey = `${legacyPrefix}${suffix}`;
156 try {
157 if (localStorage.getItem(currentKey) === null && localStorage.getItem(legacyKey) !== null) {
158 localStorage.setItem(currentKey, localStorage.getItem(legacyKey));
159 }
160 } catch {}
161 }
162 }
163
164 function loadUsage() {
165 try {
166 const records = JSON.parse(localStorage.getItem(USAGE_KEY) || '[]');
167 return Array.isArray(records) ? records.filter(record => record && Number.isFinite(record.timestamp)) : [];
168 } catch { return []; }
169 }
170
171 function loadOpenRouterPrices() {
172 try {
173 const prices = JSON.parse(localStorage.getItem(OPENROUTER_PRICES_KEY) || '{}');
174 return prices && typeof prices === 'object' && !Array.isArray(prices) ? prices : {};
175 } catch { return {}; }
176 }
177
178 function persistOpenRouterPrices() {
179 const recent = Object.entries(openRouterPrices)
180 .sort((a, b) => (Number(b[1]?.checkedAt) || 0) - (Number(a[1]?.checkedAt) || 0))
181 .slice(0, 40);
182 openRouterPrices = Object.fromEntries(recent);
183 try { localStorage.setItem(OPENROUTER_PRICES_KEY, JSON.stringify(openRouterPrices)); } catch {}
184 }
185
186 function loadTreeZoom() {
187 try { return Math.max(.8, Math.min(1.4, Number(localStorage.getItem(TREE_ZOOM_KEY)) || 1)); }
188 catch { return 1; }
189 }
190
191 function blankMap() {
192 const now = Date.now();
193 return { id: uid(), title: 'Untitled map', titleCustom: false, nodes: [], attachments: [], collapsedIds: [], activeId: null, createdAt: now, updatedAt: now };
194 }
195
196 function titleFromNodes(nodes) {
197 const first = nodes.find(node => !node.parentId) || nodes[0];
198 if (!first) return 'Untitled map';
199 const title = String(first.question).replace(/\s+/g, ' ').trim();
200 return title.length > 54 ? `${title.slice(0, 54)}…` : title;
201 }
202
203 function normalizeMap(value = {}) {
204 const normalized = normalizeState(value);
205 const attachments = Array.isArray(value.attachments) ? value.attachments
206 .filter(file => file && file.id && file.name)
207 .map(file => ({
208 id: String(file.id), name: String(file.name), size: Number(file.size) || 0,
209 createdAt: Number(file.createdAt) || Date.now(), detail: file.detail === 'high' ? 'high' : 'low',
210 kind: file.kind === 'markdown' || String(file.name).toLowerCase().endsWith('.md') ? 'markdown' : 'pdf',
211 provider: PROVIDERS[file.provider] ? file.provider : 'openai'
212 })) : [];
213 const createdAt = Number(value.createdAt) || Number(normalized.nodes[0]?.createdAt) || Date.now();
214 return {
215 id: String(value.id || uid()),
216 title: String(value.title || titleFromNodes(normalized.nodes)),
217 titleCustom: Boolean(value.titleCustom),
218 ...normalized,
219 attachments,
220 collapsedIds: Array.isArray(value.collapsedIds) ? [...new Set(value.collapsedIds.map(String))] : [],
221 createdAt,
222 updatedAt: Number(value.updatedAt) || Number(normalized.nodes.at(-1)?.createdAt) || createdAt
223 };
224 }
225
226 function loadWorkspace() {
227 let raw = null;
228 try { raw = JSON.parse(localStorage.getItem(STORAGE_KEY) || 'null'); } catch {}
229 let maps = [];
230 let activeMapId = null;
231 if (raw && Array.isArray(raw.maps)) {
232 maps = raw.maps.filter(Boolean).map(normalizeMap);
233 activeMapId = raw.activeMapId;
234 } else if (raw && Array.isArray(raw.nodes) && raw.nodes.length) {
235 // Migrate the original single-map schema in place.
236 const migrated = normalizeMap(raw);
237 maps = [migrated];
238 activeMapId = migrated.id;
239 }
240 if (!maps.length) maps.push(blankMap());
241 if (!maps.some(map => map.id === activeMapId)) activeMapId = maps[0].id;
242 return { version: 2, maps, activeMapId };
243 }
244
245 function currentMap() {
246 return workspace.maps.find(map => map.id === workspace.activeMapId) || workspace.maps[0];
247 }
248
249 function normalizeState(value) {
250 const nodes = Array.isArray(value.nodes) ? value.nodes.filter(n => n && n.id && n.question).map(node => {
251 if (node.status !== 'loading') return node;
252 return { ...node, status: 'error', error: 'The page was closed before this response finished.' };
253 }) : [];
254 const activeId = nodes.some(n => n.id === value.activeId) ? value.activeId : (nodes.at(-1)?.id || null);
255 return { nodes, activeId };
256 }
257
258 function persistSoon() {
259 clearTimeout(saveTimer);
260 saveTimer = setTimeout(() => {
261 try { localStorage.setItem(STORAGE_KEY, JSON.stringify(workspace)); }
262 catch { showToast('Browser storage is full — conversations could not be saved'); }
263 }, 180);
264 }
265
266 function persistNow() {
267 clearTimeout(saveTimer);
268 try { localStorage.setItem(STORAGE_KEY, JSON.stringify(workspace)); return true; }
269 catch { showToast('Browser storage is full — conversations could not be saved'); return false; }
270 }
271
272 function touchMap(map = state) { map.updatedAt = Date.now(); searchIndex = null; }
273
274 function refreshMapTitle(map = state) {
275 if (!map.titleCustom) map.title = titleFromNodes(map.nodes);
276 }
277
278 function nodeById(id, map = state) { return map.nodes.find(node => node.id === id); }
279
280 function pathTo(id, map = state) {
281 const path = [];
282 const seen = new Set();
283 let node = nodeById(id, map);
284 while (node && !seen.has(node.id)) {
285 seen.add(node.id);
286 path.push(node);
287 node = nodeById(node.parentId, map);
288 }
289 return path.reverse();
290 }
291
292 function childrenOf(id) { return state.nodes.filter(node => node.parentId === id); }
293
294 function uid() {
295 return globalThis.crypto?.randomUUID?.() || `${Date.now().toString(36)}-${Math.random().toString(36).slice(2)}`;
296 }
297
298 function escapeHTML(value = '') {
299 return value.replace(/[&<>'"]/g, char => ({ '&':'&', '<':'<', '>':'>', "'":''', '"':'"' })[char]);
300 }
301
302 function inlineMarkdown(text) {
303 let output = escapeHTML(text);
304 output = output.replace(/`([^`]+)`/g, '<code>$1</code>');
305 output = output.replace(/\*\*([^*]+)\*\*/g, '<strong>$1</strong>');
306 output = output.replace(/(?<!\*)\*([^*\n]+)\*(?!\*)/g, '<em>$1</em>');
307 output = output.replace(/\[([^\]]+)\]\((https?:\/\/[^\s)]+)\)/g, '<a href="$2" target="_blank" rel="noopener noreferrer">$1</a>');
308 return output;
309 }
310
311 function tableCells(line) {
312 let source = line.trim();
313 if (source.startsWith('|')) source = source.slice(1);
314 if (source.endsWith('|') && !source.endsWith('\\|')) source = source.slice(0, -1);
315 const cells = [];
316 let cell = '';
317 let code = false;
318 for (let index = 0; index < source.length; index += 1) {
319 const char = source[index];
320 if (char === '\\' && source[index + 1] === '|') {
321 cell += '|';
322 index += 1;
323 } else if (char === '`') {
324 code = !code;
325 cell += char;
326 } else if (char === '|' && !code) {
327 cells.push(cell.trim());
328 cell = '';
329 } else cell += char;
330 }
331 cells.push(cell.trim());
332 return cells;
333 }
334
335 function tableDelimiter(line) {
336 const cells = tableCells(line);
337 if (!line.includes('|') || !cells.length || cells.some(cell => !/^:?-{3,}:?$/.test(cell))) return null;
338 return cells.map(cell => cell.startsWith(':') && cell.endsWith(':') ? 'center' : cell.endsWith(':') ? 'right' : cell.startsWith(':') ? 'left' : '');
339 }
340
341 function renderTable(header, alignments, rows) {
342 const cellHTML = (cell, tag, index) => {
343 const alignment = alignments[index] ? ` style="text-align: ${alignments[index]}"` : '';
344 const scope = tag === 'th' ? ' scope="col"' : '';
345 return `<${tag}${scope}${alignment}>${inlineMarkdown(cell || '')}</${tag}>`;
346 };
347 const head = header.map((cell, index) => cellHTML(cell, 'th', index)).join('');
348 const body = rows.map(row => `<tr>${header.map((_, index) => cellHTML(row[index], 'td', index)).join('')}</tr>`).join('');
349 return `<div class="table-scroll"><table><thead><tr>${head}</tr></thead>${body ? `<tbody>${body}</tbody>` : ''}</table></div>`;
350 }
351
352 function renderMath(source, displayMode) {
353 if (!globalThis.katex) return `<code class="math-fallback">${escapeHTML(source)}</code>`;
354 try { return katex.renderToString(source, { displayMode, throwOnError: false, strict: false, trust: false }); }
355 catch { return `<code class="math-fallback">${escapeHTML(source)}</code>`; }
356 }
357
358 function markdown(source = '') {
359 const stash = [];
360 const token = html => `\u0000${stash.push(html) - 1}\u0000`;
361 let text = source.replace(/\r\n?/g, '\n');
362 text = text.replace(/```([\w+-]*)\n([\s\S]*?)```/g, (_, lang, code) => token(`<pre data-language="${escapeHTML(lang)}"><code>${escapeHTML(code.trimEnd())}</code></pre>`));
363 text = text.replace(/\$\$([\s\S]*?)\$\$/g, (_, formula) => token(renderMath(formula.trim(), true)));
364 text = text.replace(/\\\[([\s\S]*?)\\\]/g, (_, formula) => token(renderMath(formula.trim(), true)));
365 text = text.replace(/\\\((.*?)\\\)/g, (_, formula) => token(renderMath(formula.trim(), false)));
366 text = text.replace(/(?<!\\)\$([^$\n]+?)\$/g, (_, formula) => token(renderMath(formula.trim(), false)));
367
368 const lines = text.split('\n');
369 const html = [];
370 let paragraph = [];
371 let list = null;
372 let listItemOpen = false;
373 const flushParagraph = () => {
374 if (paragraph.length) html.push(`<p>${inlineMarkdown(paragraph.join('\n')).replace(/\n/g, '<br>')}</p>`);
375 paragraph = [];
376 };
377 const closeListItem = () => {
378 if (listItemOpen) html.push('</li>');
379 listItemOpen = false;
380 };
381 const closeList = () => {
382 if (!list) return;
383 closeListItem();
384 html.push(`</${list}>`);
385 list = null;
386 };
387
388 for (let lineIndex = 0; lineIndex < lines.length; lineIndex += 1) {
389 const line = lines[lineIndex];
390 const alignments = lineIndex + 1 < lines.length ? tableDelimiter(lines[lineIndex + 1]) : null;
391 if (alignments) {
392 const header = tableCells(line);
393 if (header.length === alignments.length) {
394 flushParagraph(); closeList();
395 const rows = [];
396 lineIndex += 2;
397 while (lineIndex < lines.length && lines[lineIndex].trim() && lines[lineIndex].includes('|')) {
398 rows.push(tableCells(lines[lineIndex]));
399 lineIndex += 1;
400 }
401 html.push(renderTable(header, alignments, rows));
402 lineIndex -= 1;
403 continue;
404 }
405 }
406 const heading = line.match(/^(#{1,3})\s+(.+)/);
407 const bullet = line.match(/^\s*[-*+]\s+(.+)/);
408 const numbered = line.match(/^\s*(\d+)[.)]\s+(.+)/);
409 const quote = line.match(/^>\s?(.*)/);
410 const blockToken = line.match(/^\u0000(\d+)\u0000$/);
411 if (blockToken) { flushParagraph(); closeList(); html.push(stash[Number(blockToken[1])]); }
412 else if (heading) { flushParagraph(); closeList(); const level = heading[1].length; html.push(`<h${level}>${inlineMarkdown(heading[2])}</h${level}>`); }
413 else if (bullet || numbered) {
414 flushParagraph();
415 const wanted = bullet ? 'ul' : 'ol';
416 if (list !== wanted) {
417 closeList();
418 const start = numbered && numbered[1] !== '1' ? ` start="${Number(numbered[1])}"` : '';
419 html.push(`<${wanted}${start}>`);
420 list = wanted;
421 } else closeListItem();
422 html.push(`<li>${inlineMarkdown(bullet ? bullet[1] : numbered[2])}`);
423 listItemOpen = true;
424 } else if (quote) { flushParagraph(); closeList(); html.push(`<blockquote>${inlineMarkdown(quote[1])}</blockquote>`); }
425 else if (!line.trim()) {
426 flushParagraph();
427 let nextIndex = lineIndex + 1;
428 while (nextIndex < lines.length && !lines[nextIndex].trim()) nextIndex += 1;
429 const nextLine = lines[nextIndex] || '';
430 const continuesList = Boolean(list) && (/^\s+\S/.test(nextLine) || (list === 'ul'
431 ? /^\s*[-*+]\s+/.test(nextLine)
432 : /^\s*\d+[.)]\s+/.test(nextLine)));
433 if (!continuesList) closeList();
434 }
435 else if (list && /^\s+\S/.test(line)) html.push(`<p>${inlineMarkdown(line.trim())}</p>`);
436 else { closeList(); paragraph.push(line); }
437 }
438 flushParagraph(); closeList();
439 return html.join('').replace(/\u0000(\d+)\u0000/g, (_, index) => stash[Number(index)]);
440 }
441
442 function answerHTML(node) {
443 if (node.status === 'loading' && !node.answer) return '<span class="thinking" aria-label="Thinking"><i></i><i></i><i></i></span>';
444 if (node.status === 'error') return `<p class="error-text">${escapeHTML(node.error || 'The request failed.')}</p>`;
445 return markdown(node.answer || '');
446 }
447
448 function answerAttribution(node) {
449 if (!node.model || !node.provider || !node.answer) return '';
450 return `<div class="answer-attribution" title="Generated by ${escapeHTML(node.model)} through ${escapeHTML(providerLabel(node.provider))}"><span>${escapeHTML(node.model)}</span><small>${escapeHTML(providerLabel(node.provider))}</small></div>`;
451 }
452
453 function renderConversation({ scroll = false } = {}) {
454 const previousScroll = scroll ? null : { left: window.scrollX, top: window.scrollY };
455 const path = pathTo(state.activeId);
456 els.welcome.hidden = path.length > 0;
457 els.conversation.hidden = path.length === 0;
458 const fragment = document.createDocumentFragment();
459 for (const node of path) {
460 const article = document.createElement('article');
461 article.className = 'message';
462 article.dataset.nodeId = node.id;
463 article.innerHTML = `
464 <div class="question-row"><div class="question-bubble">${escapeHTML(node.question)}</div></div>
465 <div class="answer"><span class="answer-mark" aria-hidden="true">S</span><div class="answer-content"><div class="answer-body">${answerHTML(node)}</div>${answerAttribution(node)}</div></div>
466 <div class="answer-actions">
467 <button class="mini-action copy-answer" type="button">Copy answer</button>
468 <button class="mini-action branch-here" type="button">Branch here</button>
469 ${node.status === 'error' ? '<button class="mini-action retry-node" type="button">Retry</button>' : ''}
470 </div>`;
471 fragment.append(article);
472 }
473 els.conversation.replaceChildren(fragment);
474 if (previousScroll && (window.scrollX !== previousScroll.left || window.scrollY !== previousScroll.top)) {
475 window.scrollTo({ ...previousScroll, behavior: 'auto' });
476 }
477 renderBranchContext();
478 if (scroll && state.activeId) requestAnimationFrame(() => {
479 if (scroll === 'bottom') {
480 window.scrollTo({ top: document.documentElement.scrollHeight, behavior: 'smooth' });
481 return;
482 }
483 const targetId = state.activeId;
484 requestAnimationFrame(() => {
485 if (state.activeId !== targetId) return;
486 const message = $(`.message[data-node-id="${CSS.escape(targetId)}"]`, els.conversation);
487 if (!message) return;
488 const headerHeight = $('.topbar')?.getBoundingClientRect().height || 68;
489 const top = window.scrollY + message.getBoundingClientRect().top - headerHeight - 14;
490 window.scrollTo({ top: Math.max(0, top), behavior: 'smooth' });
491 });
492 });
493 }
494
495 function renderTree() {
496 const ids = new Set(state.nodes.map(node => node.id));
497 const grouped = new Map();
498 for (const node of state.nodes) {
499 const parentId = node.parentId && ids.has(node.parentId) ? node.parentId : null;
500 if (!grouped.has(parentId)) grouped.set(parentId, []);
501 grouped.get(parentId).push(node);
502 }
503 const roots = grouped.get(null) || [];
504 const activePath = new Set(pathTo(state.activeId).map(node => node.id));
505 const collapsed = new Set(state.collapsedIds);
506 const build = nodes => {
507 const ul = document.createElement('ul');
508 for (const node of nodes) {
509 const li = document.createElement('li');
510 li.dataset.nodeId = node.id;
511 const wrap = document.createElement('div');
512 wrap.className = 'tree-node-wrap';
513 const button = document.createElement('button');
514 button.type = 'button';
515 button.className = `tree-node${node.id === state.activeId ? ' active' : ''}${activePath.has(node.id) ? ' on-path' : ''}`;
516 button.dataset.nodeId = node.id;
517 button.setAttribute('aria-current', node.id === state.activeId ? 'true' : 'false');
518 const children = grouped.get(node.id) || [];
519 const isCollapsed = children.length > 0 && collapsed.has(node.id);
520 const toggle = document.createElement(children.length ? 'button' : 'span');
521 toggle.className = children.length ? 'toggle-subtree' : 'toggle-placeholder';
522 if (children.length) {
523 toggle.type = 'button';
524 toggle.dataset.nodeId = node.id;
525 toggle.setAttribute('aria-label', `${isCollapsed ? 'Expand' : 'Collapse'} branch: ${node.question}`);
526 toggle.setAttribute('aria-expanded', String(!isCollapsed));
527 toggle.textContent = isCollapsed ? '▸' : '▾';
528 }
529 button.innerHTML = `<span class="node-dot">${node.status === 'loading' ? '…' : (activePath.has(node.id) ? '●' : '○')}</span><span class="node-copy"><span class="node-title">${escapeHTML(node.question)}</span><span class="node-meta">${children.length} ${children.length === 1 ? 'reply' : 'branches'}${isCollapsed ? ' · hidden' : ''}</span></span>`;
530 wrap.append(toggle, button);
531 li.append(wrap);
532 if (children.length && !isCollapsed) li.append(build(children));
533 ul.append(li);
534 }
535 return ul;
536 };
537 els.tree.replaceChildren(build(roots));
538 els.mapEmpty.hidden = state.nodes.length > 0;
539 els.tree.hidden = state.nodes.length === 0;
540 els.nodeCount.textContent = String(state.nodes.length);
541 let branchCount = 0;
542 for (const children of grouped.values()) branchCount += Math.max(0, children.length - 1);
543 els.branchCount.textContent = String(branchCount);
544 }
545
546 function revealNode(map, nodeId) {
547 if (!nodeId) return;
548 const hidden = new Set(map.collapsedIds);
549 for (const node of pathTo(nodeId, map).slice(0, -1)) hidden.delete(node.id);
550 map.collapsedIds = [...hidden];
551 }
552
553 function toggleSubtree(nodeId, force) {
554 if (!nodeById(nodeId)) return;
555 const collapsed = new Set(state.collapsedIds);
556 const shouldCollapse = force ?? !collapsed.has(nodeId);
557 if (shouldCollapse) collapsed.add(nodeId);
558 else collapsed.delete(nodeId);
559 state.collapsedIds = [...collapsed];
560 persistSoon();
561 renderTree();
562 }
563
564 function setAllSubtrees(collapsed) {
565 if (!collapsed) state.collapsedIds = [];
566 else {
567 const parents = new Set(state.nodes.map(node => node.parentId).filter(Boolean));
568 state.collapsedIds = [...parents];
569 }
570 persistSoon();
571 renderTree();
572 }
573
574 function updateTreeZoom(delta = 0) {
575 treeZoom = Math.round(Math.max(.8, Math.min(1.4, treeZoom + delta)) * 10) / 10;
576 els.tree.style.fontSize = `${.76 * treeZoom}rem`;
577 els.tree.style.setProperty('--tree-indent', `${20 * treeZoom}px`);
578 els.tree.style.setProperty('--tree-dot-size', `${17 * treeZoom}px`);
579 els.tree.style.setProperty('--tree-node-pad-y', `${8 * treeZoom}px`);
580 els.treeZoom.textContent = `${Math.round(treeZoom * 100)}%`;
581 try { localStorage.setItem(TREE_ZOOM_KEY, String(treeZoom)); } catch {}
582 }
583
584 function renderBranchContext() {
585 const active = nodeById(state.activeId);
586 const latest = state.nodes.at(-1);
587 const branching = active && latest && active.id !== latest.id;
588 els.branchContext.hidden = !branching;
589 if (branching) els.branchLabel.textContent = active.question;
590 }
591
592 function renderHistory() {
593 const maps = workspace.maps
594 .filter(map => map.nodes.length > 0 || map.attachments.length > 0)
595 .sort((a, b) => b.updatedAt - a.updatedAt);
596 const fragment = document.createDocumentFragment();
597 for (const map of maps) {
598 const row = document.createElement('div');
599 row.className = 'history-row';
600 const button = document.createElement('button');
601 button.type = 'button';
602 button.className = `history-item${map.id === workspace.activeMapId ? ' active' : ''}`;
603 button.dataset.mapId = map.id;
604 button.setAttribute('aria-current', map.id === workspace.activeMapId ? 'page' : 'false');
605 const date = new Date(map.updatedAt).toLocaleDateString(undefined, { month: 'short', day: 'numeric' });
606 const fileMeta = map.attachments.length ? ` · ${map.attachments.length} file${map.attachments.length === 1 ? '' : 's'}` : '';
607 button.innerHTML = `<span class="history-glyph" aria-hidden="true">${map.nodes.length || map.attachments.length ? '◇' : '＋'}</span><span class="history-copy"><span class="history-title">${escapeHTML(map.title)}</span><span class="history-meta">${map.nodes.length} ${map.nodes.length === 1 ? 'node' : 'nodes'}${fileMeta} · ${date}</span></span>`;
608 const rename = document.createElement('button');
609 rename.type = 'button';
610 rename.className = 'rename-map';
611 rename.dataset.mapId = map.id;
612 rename.setAttribute('aria-label', `Rename conversation: ${map.title}`);
613 rename.title = 'Rename this conversation';
614 rename.textContent = '✎';
615 const remove = document.createElement('button');
616 remove.type = 'button';
617 remove.className = 'delete-map';
618 remove.dataset.mapId = map.id;
619 remove.setAttribute('aria-label', `Delete conversation: ${map.title}`);
620 remove.title = 'Delete this conversation';
621 remove.textContent = '×';
622 row.append(button, rename, remove);
623 fragment.append(row);
624 }
625 els.historyList.replaceChildren(fragment);
626 els.historyEmpty.hidden = maps.length > 0;
627 els.historyList.hidden = maps.length === 0;
628 if (els.conversationSearch.value.trim()) renderSearchResults();
629 else els.searchResults.hidden = true;
630 }
631
632 function buildSearchIndex() {
633 const entries = [];
634 for (const map of workspace.maps) {
635 if (!map.nodes.length && !map.attachments.length) continue;
636 entries.push({ mapId: map.id, nodeId: null, kind: 'Map', label: map.title, fields: [map.title] });
637 for (const node of map.nodes) {
638 entries.push({
639 mapId: map.id, nodeId: node.id, kind: 'Node', label: node.question,
640 fields: [node.question, node.answer || ''], mapTitle: map.title
641 });
642 }
643 for (const file of map.attachments) {
644 entries.push({ mapId: map.id, nodeId: null, kind: file.kind === 'markdown' ? 'Markdown' : 'PDF', label: file.name, fields: [file.name], mapTitle: map.title });
645 }
646 }
647 searchIndex = entries;
648 return entries;
649 }
650
651 function searchExcerpt(fields, expression) {
652 for (const field of fields) {
653 const source = String(field || '').replace(/\s+/g, ' ').trim();
654 const index = source.search(expression);
655 if (index < 0) continue;
656 const start = Math.max(0, index - 45);
657 const end = Math.min(source.length, index + 115);
658 return `${start ? '…' : ''}${source.slice(start, end)}${end < source.length ? '…' : ''}`;
659 }
660 return '';
661 }
662
663 function renderSearchResults() {
664 const query = els.conversationSearch.value.trim();
665 if (!query) {
666 els.searchResults.hidden = true;
667 els.historyList.hidden = false;
668 els.historyEmpty.hidden = workspace.maps.some(map => map.nodes.length || map.attachments.length);
669 return;
670 }
671 const expression = new RegExp(query.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'), 'i');
672 const matches = [];
673 for (const entry of searchIndex || buildSearchIndex()) {
674 const excerpt = searchExcerpt(entry.fields, expression);
675 if (!excerpt) continue;
676 matches.push({ ...entry, excerpt });
677 if (matches.length >= 60) break;
678 }
679 els.searchResults.innerHTML = matches.length ? matches.map(entry => `
680 <button class="search-result" type="button" data-map-id="${escapeHTML(entry.mapId)}"${entry.nodeId ? ` data-node-id="${escapeHTML(entry.nodeId)}"` : ''}>
681 <span class="search-result-top"><strong>${escapeHTML(entry.label)}</strong><small>${escapeHTML(entry.kind)} · ${escapeHTML(entry.mapTitle || entry.label)}</small></span>
682 <span class="search-excerpt">${escapeHTML(entry.excerpt)}</span>
683 </button>`).join('') : `<p class="search-empty">No results for “${escapeHTML(query)}”.</p>`;
684 els.searchResults.hidden = false;
685 els.historyList.hidden = true;
686 els.historyEmpty.hidden = true;
687 }
688
689 function clearSearch() {
690 clearTimeout(searchTimer);
691 els.conversationSearch.value = '';
692 renderSearchResults();
693 renderHistory();
694 }
695
696 function formatFileSize(bytes) {
697 if (!bytes) return '';
698 if (bytes < 1024 * 1024) return `${Math.max(1, Math.round(bytes / 1024))} KB`;
699 return `${(bytes / (1024 * 1024)).toFixed(bytes < 10 * 1024 * 1024 ? 1 : 0)} MB`;
700 }
701
702 function renderAttachments() {
703 const fragment = document.createDocumentFragment();
704 for (const file of state.attachments) {
705 const chip = document.createElement('span');
706 chip.className = 'attachment-chip';
707 const available = file.provider === settings.provider;
708 chip.classList.toggle('inactive-provider', !available);
709 chip.title = `${file.name}${file.size ? ` · ${formatFileSize(file.size)}` : ''} · Uploaded to ${providerLabel(file.provider)}${available ? ' · Included with every question' : ' · Not sent with the selected provider'}`;
710 const badge = file.kind === 'markdown' ? 'MD' : 'PDF';
711 chip.innerHTML = `<span class="attachment-badge${file.kind === 'markdown' ? ' md' : ''}" aria-hidden="true">${badge}</span><span class="attachment-name">${escapeHTML(file.name)}</span>${available ? '' : `<span class="attachment-provider">${escapeHTML(providerLabel(file.provider))}</span>`}<button class="remove-attachment" type="button" data-file-id="${escapeHTML(file.id)}" aria-label="Remove ${escapeHTML(file.name)} from this map">×</button>`;
712 fragment.append(chip);
713 }
714 if (uploadingFiles && state.id === uploadTargetMapId) {
715 const status = document.createElement('span');
716 status.className = 'attachment-chip upload-status';
717 status.innerHTML = '<span class="upload-spinner" aria-hidden="true"></span> Uploading…';
718 fragment.append(status);
719 }
720 els.attachments.replaceChildren(fragment);
721 els.attachments.hidden = !state.attachments.length && !(uploadingFiles && state.id === uploadTargetMapId);
722 els.uploadFile.disabled = uploadingFiles || Boolean(activeRequest);
723 }
724
725 function renderAll(options) { renderConversation(options); renderTree(); renderHistory(); renderAttachments(); }
726
727 function updateStreamedNode(node) {
728 if (state.activeId !== node.id || !state.nodes.includes(node)) return;
729 const body = $(`.message[data-node-id="${CSS.escape(node.id)}"] .answer-body`, els.conversation);
730 if (body) {
731 const previousScroll = { left: window.scrollX, top: window.scrollY };
732 body.innerHTML = answerHTML(node);
733 if (window.scrollX !== previousScroll.left || window.scrollY !== previousScroll.top) {
734 window.scrollTo({ ...previousScroll, behavior: 'auto' });
735 }
736 }
737 }
738
739 function inputFor(map, parentId, question, provider = settings.provider) {
740 const messages = [];
741 for (const node of pathTo(parentId, map)) {
742 if (provider === 'openrouter') {
743 messages.push({ type: 'message', role: 'user', content: [{ type: 'input_text', text: node.question }] });
744 if (node.answer) messages.push({
745 type: 'message', role: 'assistant', id: `msg_${String(node.id).replace(/[^a-zA-Z0-9_-]/g, '')}`,
746 status: 'completed', content: [{ type: 'output_text', text: node.answer, annotations: [] }]
747 });
748 } else {
749 messages.push({ role: 'user', content: node.question });
750 if (node.answer) messages.push({ role: 'assistant', content: node.answer });
751 }
752 }
753 const content = map.attachments
754 .filter(file => file.provider === provider)
755 .map(file => file.kind === 'markdown'
756 ? { type: 'input_file', file_id: file.id }
757 : { type: 'input_file', file_id: file.id, detail: file.detail || 'low' });
758 content.push({ type: 'input_text', text: question });
759 const structured = provider === 'openrouter' || content.length > 1;
760 messages.push(structured ? { type: 'message', role: 'user', content } : { role: 'user', content: question });
761 return messages;
762 }
763
764 function filesEndpoint(apiUrl = settings.apiUrl) {
765 const url = new URL(apiUrl);
766 if (!/\/responses\/?$/.test(url.pathname)) throw new Error('The configured endpoint is not a Responses API URL, so its Files endpoint cannot be derived.');
767 url.pathname = url.pathname.replace(/\/responses\/?$/, '/files');
768 url.search = '';
769 url.hash = '';
770 return url.toString();
771 }
772
773 async function uploadFiles(fileList) {
774 const files = [...fileList];
775 if (!files.length) return;
776 if (activeRequest || uploadingFiles) { showToast('Finish the current operation first'); return; }
777 if (!settings.apiKey) { openSettings(); showToast(`Add a ${providerLabel()} API key before uploading`); return; }
778
779 const valid = files.filter(file => /\.(pdf|md)$/i.test(file.name));
780 if (valid.length !== files.length) { showToast('Only PDF and Markdown (.md) files can be added'); return; }
781 if (valid.some(file => file.size >= FILE_REQUEST_LIMIT)) { showToast('Each file must be smaller than 50 MB'); return; }
782 const existingBytes = state.attachments.filter(file => file.provider === settings.provider).reduce((total, file) => total + file.size, 0);
783 const addedBytes = valid.reduce((total, file) => total + file.size, 0);
784 if (existingBytes + addedBytes >= FILE_REQUEST_LIMIT) { showToast('Files in one map must total less than 50 MB'); return; }
785
786 const targetMap = state;
787 const connection = { ...settings };
788 uploadingFiles = true;
789 uploadTargetMapId = targetMap.id;
790 renderAttachments();
791 let uploaded = 0;
792 try {
793 const endpoint = filesEndpoint(connection.apiUrl);
794 for (const file of valid) {
795 const form = new FormData();
796 if (connection.provider === 'openai') form.append('purpose', 'user_data');
797 form.append('file', file, file.name);
798 const response = await fetch(endpoint, {
799 method: 'POST', headers: requestHeaders(false, connection), body: form
800 });
801 if (!response.ok) {
802 let message = `File upload failed (${response.status})`;
803 try { const data = await response.json(); message = data.error?.message || message; } catch {}
804 throw new Error(message);
805 }
806 const data = await response.json();
807 if (!data.id) throw new Error('The Files API did not return a file ID.');
808 targetMap.attachments.push({
809 id: String(data.id), name: String(data.filename || file.name),
810 size: Number(data.bytes ?? data.size_bytes) || file.size, createdAt: Date.now(), detail: 'low',
811 kind: file.name.toLowerCase().endsWith('.md') ? 'markdown' : 'pdf',
812 provider: connection.provider
813 });
814 uploaded += 1;
815 touchMap(targetMap);
816 persistNow();
817 if (state === targetMap) renderAll();
818 }
819 showToast(`${uploaded} file${uploaded === 1 ? '' : 's'} added to this map`);
820 } catch (error) {
821 showToast(error.message || 'File upload failed');
822 } finally {
823 uploadingFiles = false;
824 uploadTargetMapId = null;
825 els.fileInput.value = '';
826 renderAll();
827 }
828 }
829
830 function removeAttachment(fileId) {
831 const file = state.attachments.find(candidate => candidate.id === fileId);
832 if (!file) return;
833 if (!confirm(`Remove “${file.name}” from this map? The uploaded copy is not deleted from the API provider.`)) return;
834 state.attachments = state.attachments.filter(candidate => candidate.id !== fileId);
835 touchMap();
836 persistNow();
837 renderAll();
838 showToast('File removed from this map');
839 }
840
841 async function ask(question, parentId = state.activeId) {
842 question = question.trim();
843 if (!question) return;
844 if (activeRequest) { showToast('Stop or finish the current response first'); return; }
845 if (uploadingFiles) { showToast('Wait for the file upload to finish'); return; }
846 if (!settings.apiKey) { openSettings(); showToast(`Add a ${providerLabel()} API key to begin`); return; }
847
848 const requestMap = state;
849 const connection = { ...settings };
850 const node = {
851 id: uid(), parentId: parentId || null, question, answer: '', status: 'loading', createdAt: Date.now(),
852 provider: connection.provider, model: connection.model
853 };
854 requestMap.nodes.push(node);
855 requestMap.activeId = node.id;
856 revealNode(requestMap, node.id);
857 refreshMapTitle(requestMap);
858 touchMap(requestMap);
859 persistSoon();
860 renderAll({ scroll: true });
861 setBusy(true);
862 const controller = new AbortController();
863 activeRequest = controller;
864 let completedUsage = null;
865
866 try {
867 const response = await fetch(connection.apiUrl, {
868 method: 'POST',
869 headers: requestHeaders(true, connection),
870 body: JSON.stringify({ model: connection.model, instructions: connection.systemPrompt, input: inputFor(requestMap, parentId, question, connection.provider), stream: true }),
871 signal: controller.signal
872 });
873 if (!response.ok) {
874 let message = `API request failed (${response.status})`;
875 try { const data = await response.json(); message = data.error?.message || message; } catch {}
876 throw new Error(message);
877 }
878 if (!response.body) throw new Error('This browser did not provide a streaming response body.');
879 await consumeSSE(response.body, event => {
880 if (event.type === 'response.output_text.delta' || event.type === 'response.content_part.delta') node.answer += event.delta || '';
881 if (event.type === 'response.completed' || event.type === 'response.done') {
882 node.model = String(event.response?.model || node.model);
883 completedUsage = event.response?.usage || event.usage || completedUsage;
884 }
885 if (event.type === 'response.failed') throw new Error(event.response?.error?.message || 'The model response failed.');
886 }, () => updateStreamedNode(node));
887 node.status = 'complete';
888 if (completedUsage) await recordUsage(node.id, node.model || connection.model, connection.apiUrl, completedUsage, connection.provider);
889 } catch (error) {
890 node.status = 'error';
891 node.error = error.name === 'AbortError' ? 'Response stopped.' : error.message;
892 } finally {
893 activeRequest = null;
894 touchMap(requestMap);
895 persistSoon();
896 setBusy(false);
897 renderAll();
898 }
899 }
900
901 async function consumeSSE(stream, onEvent, onPaint) {
902 const reader = stream.getReader();
903 const decoder = new TextDecoder();
904 let buffer = '';
905 let paintQueued = false;
906 const queuePaint = () => {
907 if (paintQueued) return;
908 paintQueued = true;
909 setTimeout(() => { paintQueued = false; onPaint(); }, 70);
910 };
911 const processBlock = block => {
912 for (const line of block.split(/\r?\n/)) {
913 if (!line.startsWith('data:')) continue;
914 const data = line.slice(5).trim();
915 if (!data || data === '[DONE]') continue;
916 onEvent(JSON.parse(data));
917 queuePaint();
918 }
919 };
920 while (true) {
921 const { done, value } = await reader.read();
922 buffer += decoder.decode(value || new Uint8Array(), { stream: !done });
923 const blocks = buffer.split(/\r?\n\r?\n/);
924 buffer = blocks.pop() || '';
925 for (const block of blocks) processBlock(block);
926 if (done) break;
927 }
928 if (buffer.trim()) processBlock(buffer);
929 onPaint();
930 }
931
932 function setBusy(busy) {
933 els.prompt.disabled = busy;
934 els.send.textContent = busy ? '■' : '↑';
935 els.send.setAttribute('aria-label', busy ? 'Stop response' : 'Send message');
936 els.uploadFile.disabled = busy || uploadingFiles;
937 }
938
939 function openSettings() {
940 settingsDraft = structuredClone({
941 activeModelId: settings.activeModelId, apiKeys: settings.apiKeys, models: settings.models
942 });
943 els.openaiApiKey.value = settingsDraft.apiKeys.openai || '';
944 els.openrouterApiKey.value = settingsDraft.apiKeys.openrouter || '';
945 try { els.openaiAdminKey.value = sessionStorage.getItem(OPENAI_ADMIN_SESSION_KEY) || ''; }
946 catch { els.openaiAdminKey.value = ''; }
947 fillModelOptions(els.openaiModelOptions, PROVIDERS.openai.models);
948 fillModelOptions(els.openrouterModelOptions, PROVIDERS.openrouter.models);
949 renderModelCards();
950 els.systemPrompt.value = settings.systemPrompt;
951 els.settings.showModal();
952 setTimeout(() => (settings.provider === 'openrouter' ? els.openrouterApiKey : els.openaiApiKey).focus(), 50);
953 }
954
955 function fillModelOptions(list, models) {
956 list.replaceChildren(...models.map(model => Object.assign(document.createElement('option'), { value: model })));
957 }
958
959 function renderModelCards() {
960 if (!settingsDraft) return;
961 els.modelConfigs.innerHTML = settingsDraft.models.map((connection, index) => {
962 const defaults = PROVIDERS[connection.provider];
963 const active = connection.id === settingsDraft.activeModelId;
964 return `<section class="model-config${active ? ' active' : ''}" data-model-card data-model-id="${escapeHTML(connection.id)}" data-provider="${connection.provider}">
965 <div class="model-config-heading">
966 <div><span class="provider-logo">${connection.provider === 'openrouter' ? 'OR' : 'OAI'}</span><h4>Model ${index + 1}</h4></div>
967 <label class="default-model"><input class="default-model-radio" type="radio" name="default-model" value="${escapeHTML(connection.id)}"${active ? ' checked' : ''}> Use by default</label>
968 </div>
969 <div class="model-fields">
970 <label>Provider
971 <select class="model-provider">
972 <option value="openai"${connection.provider === 'openai' ? ' selected' : ''}>OpenAI</option>
973 <option value="openrouter"${connection.provider === 'openrouter' ? ' selected' : ''}>OpenRouter</option>
974 </select>
975 </label>
976 <label>Model
977 <input class="model-name-input" type="text" value="${escapeHTML(connection.model)}" placeholder="${escapeHTML(defaults.model)}" list="${connection.provider}-model-options" spellcheck="false" required>
978 </label>
979 </div>
980 <div class="model-price" aria-live="polite">Checking pricing…</div>
981 <details class="provider-advanced">
982 <summary>Endpoint</summary>
983 <label>Responses API endpoint
984 <input class="model-api-url" type="url" value="${escapeHTML(connection.apiUrl)}" spellcheck="false" required>
985 </label>
986 </details>
987 <button class="remove-model" type="button"${settingsDraft.models.length === 1 ? ' disabled' : ''} aria-label="Remove model ${index + 1}">Remove model</button>
988 </section>`;
989 }).join('');
990 updateAllModelPrices();
991 }
992
993 function captureSettingsForm() {
994 if (!settingsDraft) return;
995 settingsDraft.apiKeys = {
996 openai: els.openaiApiKey.value.trim(), openrouter: els.openrouterApiKey.value.trim()
997 };
998 settingsDraft.models = [...els.modelConfigs.querySelectorAll('[data-model-card]')].map(card => {
999 const provider = $('.model-provider', card).value;
1000 return {
1001 id: card.dataset.modelId, provider,
1002 model: $('.model-name-input', card).value.trim() || PROVIDERS[provider].model,
1003 apiUrl: $('.model-api-url', card).value.trim() || PROVIDERS[provider].apiUrl
1004 };
1005 });
1006 settingsDraft.activeModelId = $('input[name="default-model"]:checked', els.modelConfigs)?.value
1007 || settingsDraft.models[0]?.id;
1008 try {
1009 const adminKey = els.openaiAdminKey.value.trim();
1010 if (adminKey) sessionStorage.setItem(OPENAI_ADMIN_SESSION_KEY, adminKey);
1011 else sessionStorage.removeItem(OPENAI_ADMIN_SESSION_KEY);
1012 } catch {}
1013 }
1014
1015 function updateModelCardSelection() {
1016 const selected = $('input[name="default-model"]:checked', els.modelConfigs)?.value;
1017 els.modelConfigs.querySelectorAll('[data-model-card]').forEach(card => {
1018 card.classList.toggle('active', card.dataset.modelId === selected);
1019 });
1020 }
1021
1022 function showToast(message) {
1023 els.toast.textContent = message;
1024 els.toast.classList.add('show');
1025 clearTimeout(toastTimer);
1026 toastTimer = setTimeout(() => els.toast.classList.remove('show'), 2200);
1027 }
1028
1029 function updateKeyStatus() {
1030 els.keyStatus.classList.toggle('ready', Boolean(settings.apiKey));
1031 els.activeModel.textContent = settings.model;
1032 els.activeProvider.textContent = providerLabel();
1033 els.activeConnection.title = `${providerLabel()} · ${settings.model} — open settings`;
1034 els.activeConnection.setAttribute('aria-label', `Current model: ${settings.model} through ${providerLabel()}. Open API settings`);
1035 const button = $('#open-settings');
1036 button.title = `${providerLabel()} · ${settings.model}`;
1037 button.setAttribute('aria-label', `API settings — ${providerLabel()}, ${settings.model}`);
1038 }
1039
1040 function updateThemeButton() {
1041 const dark = document.documentElement.dataset.theme === 'dark';
1042 const button = $('#theme-toggle');
1043 button.querySelector('span').textContent = dark ? '☀' : '☾';
1044 button.setAttribute('aria-label', `Switch to ${dark ? 'light' : 'dark'} theme`);
1045 button.title = `Switch to ${dark ? 'light' : 'dark'} theme`;
1046 }
1047
1048 function toggleTheme() {
1049 const next = document.documentElement.dataset.theme === 'dark' ? 'light' : 'dark';
1050 document.documentElement.dataset.theme = next;
1051 try { localStorage.setItem(THEME_KEY, next); } catch {}
1052 updateThemeButton();
1053 }
1054
1055 function priceForModel(model) {
1056 const key = String(model || '').toLowerCase();
1057 return MODEL_PRICES.find(price => price.match.test(key)) || null;
1058 }
1059
1060 function formatModelRate(value) {
1061 if (!Number.isFinite(value)) return 'Unavailable';
1062 return value.toLocaleString(undefined, {
1063 style: 'currency', currency: 'USD', minimumFractionDigits: 2, maximumFractionDigits: 6
1064 });
1065 }
1066
1067 async function updateModelPrice(card) {
1068 if (!card) return;
1069 const preview = $('.model-price', card);
1070 const provider = $('.model-provider', card)?.value;
1071 const model = $('.model-name-input', card)?.value.trim();
1072 if (!preview) return;
1073 preview.classList.remove('unavailable');
1074 if (!model) { preview.textContent = 'Enter a model name to see pricing.'; return; }
1075 preview.textContent = provider === 'openrouter' ? 'Checking OpenRouter pricing…' : 'Checking pricing…';
1076 const price = provider === 'openrouter' ? await openRouterPriceForModel(model) : priceForModel(model);
1077 if (!card.isConnected || $('.model-provider', card)?.value !== provider || $('.model-name-input', card)?.value.trim() !== model) return;
1078 if (!price) {
1079 preview.textContent = 'Pricing unavailable for this model.';
1080 preview.classList.add('unavailable');
1081 return;
1082 }
1083 preview.classList.remove('unavailable');
1084 preview.innerHTML = `<span>Input <strong>${formatModelRate(price.input)}</strong></span><span>Output <strong>${formatModelRate(price.output)}</strong></span><small>per 1M tokens</small>`;
1085 }
1086
1087 function updateAllModelPrices() {
1088 els.modelConfigs.querySelectorAll('[data-model-card]').forEach(card => updateModelPrice(card));
1089 }
1090
1091 function isOpenAIEndpoint(apiUrl) {
1092 try { return new URL(apiUrl).hostname === 'api.openai.com'; }
1093 catch { return false; }
1094 }
1095
1096 async function openRouterPriceForModel(model) {
1097 const key = String(model || '').trim();
1098 if (!key.includes('/')) return null;
1099 const cached = openRouterPrices[key];
1100 const validCached = cached && Number.isFinite(Number(cached.input)) && Number.isFinite(Number(cached.output));
1101 if (validCached && Date.now() - Number(cached.checkedAt) < PRICE_CACHE_TTL) return cached;
1102 try {
1103 const path = key.split('/').map(encodeURIComponent).join('/');
1104 const response = await fetch(`https://openrouter.ai/api/v1/model/${path}`, {
1105 headers: { 'Accept': 'application/json' }
1106 });
1107 if (!response.ok) return validCached ? cached : null;
1108 const rawPricing = (await response.json()).data?.pricing;
1109 const pricing = Array.isArray(rawPricing) ? rawPricing[0] : rawPricing;
1110 const prompt = pricing?.prompt == null ? NaN : Number(pricing.prompt);
1111 const completion = pricing?.completion == null ? NaN : Number(pricing.completion);
1112 const cacheRead = pricing?.input_cache_read == null ? NaN : Number(pricing.input_cache_read);
1113 if (!Number.isFinite(prompt) || !Number.isFinite(completion)) return validCached ? cached : null;
1114 const price = {
1115 input: prompt * 1_000_000,
1116 cached: (Number.isFinite(cacheRead) ? cacheRead : prompt) * 1_000_000,
1117 output: completion * 1_000_000,
1118 request: Number(pricing?.request) || 0,
1119 checkedAt: Date.now(),
1120 source: 'openrouter'
1121 };
1122 openRouterPrices[key] = price;
1123 persistOpenRouterPrices();
1124 return price;
1125 } catch { return validCached ? cached : null; }
1126 }
1127
1128 async function recordUsage(nodeId, model, apiUrl, rawUsage, provider) {
1129 if (usageRecords.some(record => record.nodeId === nodeId)) return;
1130 const inputTokens = Number(rawUsage.input_tokens) || 0;
1131 const outputTokens = Number(rawUsage.output_tokens) || 0;
1132 const cachedTokens = Math.min(inputTokens, Number(rawUsage.input_tokens_details?.cached_tokens) || 0);
1133 const totalTokens = Number(rawUsage.total_tokens) || inputTokens + outputTokens;
1134 const price = provider === 'openrouter'
1135 ? await openRouterPriceForModel(model)
1136 : (isOpenAIEndpoint(apiUrl) ? priceForModel(model) : null);
1137 const costUSD = price
1138 ? ((((inputTokens - cachedTokens) * price.input) + (cachedTokens * price.cached) + (outputTokens * price.output)) / 1_000_000) + (Number(price.request) || 0)
1139 : null;
1140 usageRecords.push({
1141 id: uid(), nodeId, timestamp: Date.now(), model: String(model || 'unknown'),
1142 inputTokens, cachedTokens, outputTokens, totalTokens, costUSD,
1143 rates: price ? {
1144 input: price.input, cached: price.cached, output: price.output,
1145 request: Number(price.request) || 0, source: price.source || 'openai', checkedAt: price.checkedAt || Date.now()
1146 } : null
1147 });
1148 // Keep bounded history while retaining roughly a year of normal personal use.
1149 usageRecords = usageRecords.slice(-2000);
1150 try { localStorage.setItem(USAGE_KEY, JSON.stringify(usageRecords)); }
1151 catch { showToast('Usage was returned, but local usage history is full'); }
1152 updateUsageButton();
1153 }
1154
1155 function currentMonthRecords() {
1156 const now = new Date();
1157 return usageRecords.filter(record => {
1158 const date = new Date(record.timestamp);
1159 return date.getFullYear() === now.getFullYear() && date.getMonth() === now.getMonth();
1160 });
1161 }
1162
1163 function sum(records, key) { return records.reduce((total, record) => total + (Number(record[key]) || 0), 0); }
1164
1165 function formatTokens(value, compact = false) {
1166 const number = Number(value) || 0;
1167 if (!compact || number < 1000) return Math.round(number).toLocaleString();
1168 if (number < 1_000_000) return `${(number / 1000).toFixed(number < 10_000 ? 1 : 0)}K`;
1169 return `${(number / 1_000_000).toFixed(number < 10_000_000 ? 1 : 0)}M`;
1170 }
1171
1172 function formatCost(value) {
1173 if (!Number.isFinite(value)) return 'Unpriced';
1174 if (value > 0 && value < .01) return '<$0.01';
1175 return value.toLocaleString(undefined, { style: 'currency', currency: 'USD', minimumFractionDigits: 2, maximumFractionDigits: value < 1 ? 4 : 2 });
1176 }
1177
1178 function formatDetailedCost(value) {
1179 if (!Number.isFinite(value)) return 'Unpriced';
1180 if (value === 0) return '$0.00';
1181 const decimalPlaces = value > 0 && value < .01 ? 10 : (value < 1 ? 4 : 2);
1182 return value.toLocaleString(undefined, {
1183 style: 'currency', currency: 'USD', minimumFractionDigits: 2, maximumFractionDigits: decimalPlaces
1184 });
1185 }
1186
1187 function updateUsageButton() {
1188 const total = sum(currentMonthRecords(), 'totalTokens');
1189 els.monthTokens.textContent = formatTokens(total, true);
1190 const label = `${formatTokens(total)} tokens tracked this month`;
1191 $('#open-usage').title = label;
1192 $('#open-usage').setAttribute('aria-label', `${label}. Open API usage details`);
1193 }
1194
1195 function usageRowsByModel(records) {
1196 const groups = new Map();
1197 for (const record of records) {
1198 const model = String(record.model || 'unknown');
1199 if (!groups.has(model)) groups.set(model, { model, totalTokens: 0, costUSD: 0, unpriced: 0 });
1200 const group = groups.get(model);
1201 group.totalTokens += Number(record.totalTokens) || 0;
1202 if (Number.isFinite(record.costUSD)) group.costUSD += record.costUSD;
1203 else group.unpriced += 1;
1204 }
1205 return [...groups.values()].sort((a, b) => b.totalTokens - a.totalTokens);
1206 }
1207
1208 function renderUsage() {
1209 const records = currentMonthRecords().sort((a, b) => b.timestamp - a.timestamp);
1210 const totalCost = records.reduce((total, record) => total + (Number.isFinite(record.costUSD) ? record.costUSD : 0), 0);
1211 const unpriced = records.filter(record => !Number.isFinite(record.costUSD)).length;
1212 els.usageMonth.textContent = new Date().toLocaleDateString(undefined, { month: 'long', year: 'numeric' });
1213 els.usageTotal.textContent = formatTokens(sum(records, 'totalTokens'));
1214 els.usageCost.textContent = records.length && unpriced === records.length
1215 ? 'Unpriced'
1216 : `${formatCost(totalCost)}${unpriced ? ' +' : ''}`;
1217 els.usageRequests.textContent = formatTokens(records.length);
1218 els.usageInput.textContent = formatTokens(sum(records, 'inputTokens'));
1219 els.usageCached.textContent = formatTokens(sum(records, 'cachedTokens'));
1220 els.usageOutput.textContent = formatTokens(sum(records, 'outputTokens'));
1221
1222 const groups = usageRowsByModel(records);
1223 els.usageModels.innerHTML = groups.length ? groups.map(group => `
1224 <div class="usage-row">
1225 <span class="model-name" title="${escapeHTML(group.model)}">${escapeHTML(group.model)}</span>
1226 <span class="row-tokens">${formatTokens(group.totalTokens)} tokens</span>
1227 <span class="row-cost">${group.unpriced ? 'Partly unpriced' : formatCost(group.costUSD)}</span>
1228 </div>`).join('') : '<p class="usage-empty">No tracked requests this month.</p>';
1229
1230 els.usageRecent.innerHTML = records.length ? records.slice(0, 12).map(record => `
1231 <div class="usage-row">
1232 <span class="recent-request-copy">
1233 <span class="request-date">${new Date(record.timestamp).toLocaleString(undefined, { month: 'short', day: 'numeric', hour: 'numeric', minute: '2-digit' })}</span>
1234 <span class="model-name" title="${escapeHTML(record.model || 'unknown')}">${escapeHTML(record.model || 'unknown')}</span>
1235 </span>
1236 <span class="row-tokens">${formatTokens(record.totalTokens)} tokens</span>
1237 <span class="row-cost">${formatDetailedCost(record.costUSD)}</span>
1238 </div>`).join('') : '<p class="usage-empty">Completed requests will appear here.</p>';
1239
1240 els.usageNote.textContent = unpriced
1241 ? `${unpriced} request${unpriced === 1 ? '' : 's'} could not be estimated because its model price could not be resolved.`
1242 : 'Estimates use the rate recorded when each request completed: the local OpenAI table or OpenRouter\'s model-pricing API.';
1243 }
1244
1245 function monthStartUnix() {
1246 const now = new Date();
1247 return Math.floor(Date.UTC(now.getUTCFullYear(), now.getUTCMonth(), 1) / 1000);
1248 }
1249
1250 async function responseError(response, fallback) {
1251 try {
1252 const data = await response.json();
1253 return data.error?.message || data.message || fallback;
1254 } catch { return fallback; }
1255 }
1256
1257 async function fetchOpenAIActualSpend(adminKey) {
1258 let page = '';
1259 let total = 0;
1260 let pages = 0;
1261 do {
1262 const params = new URLSearchParams({
1263 start_time: String(monthStartUnix()),
1264 end_time: String(Math.floor(Date.now() / 1000) + 1),
1265 bucket_width: '1d', limit: '31'
1266 });
1267 if (page) params.set('page', page);
1268 const response = await fetch(`https://api.openai.com/v1/organization/costs?${params}`, {
1269 headers: { 'Authorization': `Bearer ${adminKey}`, 'Content-Type': 'application/json' }
1270 });
1271 if (!response.ok) throw new Error(await responseError(response, `OpenAI billing request failed (${response.status})`));
1272 const data = await response.json();
1273 for (const bucket of data.data || []) {
1274 for (const result of bucket.results || []) {
1275 if (result.amount?.currency && result.amount.currency !== 'usd') continue;
1276 total += Number(result.amount?.value) || 0;
1277 }
1278 }
1279 page = data.has_more ? String(data.next_page || '') : '';
1280 pages += 1;
1281 } while (page && pages < 10);
1282 return total;
1283 }
1284
1285 async function fetchOpenRouterActualSpend(apiKey) {
1286 const response = await fetch('https://openrouter.ai/api/v1/key', {
1287 headers: { 'Authorization': `Bearer ${apiKey}`, 'Accept': 'application/json' }
1288 });
1289 if (!response.ok) throw new Error(await responseError(response, `OpenRouter billing request failed (${response.status})`));
1290 const value = Number((await response.json()).data?.usage_monthly);
1291 if (!Number.isFinite(value)) throw new Error('OpenRouter did not return month-to-date usage for this key.');
1292 return value;
1293 }
1294
1295 function setActualSpendState(provider, state, detail = '') {
1296 const cost = provider === 'openai' ? els.actualOpenAICost : els.actualOpenRouterCost;
1297 const status = provider === 'openai' ? els.actualOpenAIStatus : els.actualOpenRouterStatus;
1298 status.classList.toggle('error', state === 'error');
1299 if (state === 'loading') { cost.textContent = '…'; status.textContent = 'Contacting provider…'; }
1300 else if (state === 'missing') { cost.textContent = '—'; status.textContent = detail; }
1301 else if (state === 'error') { cost.textContent = '—'; status.textContent = detail; }
1302 else { cost.textContent = formatCost(detail); status.textContent = 'Retrieved just now'; }
1303 }
1304
1305 async function refreshActualSpend() {
1306 const requestId = ++actualSpendRequest;
1307 const refreshButton = $('#refresh-actual-spend');
1308 const openRouterKey = settings.apiKeys.openrouter;
1309 let openAIAdminKey = '';
1310 try { openAIAdminKey = sessionStorage.getItem(OPENAI_ADMIN_SESSION_KEY) || ''; } catch {}
1311 const tasks = [];
1312 const totals = {};
1313
1314 if (openAIAdminKey) {
1315 setActualSpendState('openai', 'loading');
1316 tasks.push(fetchOpenAIActualSpend(openAIAdminKey)
1317 .then(value => { totals.openai = value; if (requestId === actualSpendRequest) setActualSpendState('openai', 'ready', value); })
1318 .catch(error => { if (requestId === actualSpendRequest) setActualSpendState('openai', 'error', error.message); }));
1319 } else setActualSpendState('openai', 'missing', 'Add an Admin API key in Settings');
1320
1321 if (openRouterKey) {
1322 setActualSpendState('openrouter', 'loading');
1323 tasks.push(fetchOpenRouterActualSpend(openRouterKey)
1324 .then(value => { totals.openrouter = value; if (requestId === actualSpendRequest) setActualSpendState('openrouter', 'ready', value); })
1325 .catch(error => { if (requestId === actualSpendRequest) setActualSpendState('openrouter', 'error', error.message); }));
1326 } else setActualSpendState('openrouter', 'missing', 'Add an OpenRouter API key in Settings');
1327
1328 refreshButton.disabled = true;
1329 els.actualCombinedCost.textContent = '…';
1330 els.actualCombinedStatus.textContent = 'Retrieving available totals…';
1331 await Promise.all(tasks);
1332 if (requestId !== actualSpendRequest) return;
1333 refreshButton.disabled = false;
1334 const available = Object.values(totals);
1335 els.actualCombinedCost.textContent = available.length ? formatCost(available.reduce((sum, value) => sum + value, 0)) : '—';
1336 els.actualCombinedStatus.textContent = available.length === 2 ? 'Both providers' : available.length ? 'One provider available' : 'No provider totals available';
1337 }
1338
1339 function openUsage() {
1340 renderUsage();
1341 els.usageDialog.showModal();
1342 refreshActualSpend();
1343 }
1344
1345 function createNewMap() {
1346 const existingBlank = workspace.maps.find(map => map.nodes.length === 0 && map.attachments.length === 0);
1347 const map = existingBlank || blankMap();
1348 if (!existingBlank) workspace.maps.push(map);
1349 workspace.activeMapId = map.id;
1350 state = map;
1351 els.conversationSearch.value = '';
1352 persistNow();
1353 renderAll();
1354 closeHistoryOnSmallScreen();
1355 window.scrollTo({ top: 0, behavior: 'smooth' });
1356 els.prompt.focus();
1357 }
1358
1359 function switchMap(mapId, nodeId = null) {
1360 const map = workspace.maps.find(candidate => candidate.id === mapId);
1361 if (!map) { closeHistoryOnSmallScreen(); return; }
1362 workspace.activeMapId = map.id;
1363 state = map;
1364 state.activeId = nodeId && nodeById(nodeId, state) ? nodeId : (state.nodes.at(-1)?.id || null);
1365 revealNode(state, state.activeId);
1366 persistSoon();
1367 hideSelectionMenu();
1368 renderAll({ scroll: state.activeId ? (nodeId ? true : 'bottom') : false });
1369 closeHistoryOnSmallScreen();
1370 }
1371
1372 function activateNode(nodeId, scroll = true) {
1373 if (!nodeById(nodeId)) return;
1374 state.activeId = nodeId;
1375 revealNode(state, nodeId);
1376 persistSoon();
1377 renderAll({ scroll });
1378 document.body.classList.remove('map-open');
1379 }
1380
1381 function visibleTreeNodeIds() {
1382 return [...els.tree.querySelectorAll('.tree-node')].map(button => button.dataset.nodeId);
1383 }
1384
1385 function moveVisibleNode(offset) {
1386 const ids = visibleTreeNodeIds();
1387 if (!ids.length) return;
1388 const current = Math.max(0, ids.indexOf(state.activeId));
1389 activateNode(ids[Math.max(0, Math.min(ids.length - 1, current + offset))]);
1390 }
1391
1392 function moveMap(offset) {
1393 const maps = workspace.maps
1394 .filter(map => map.nodes.length || map.attachments.length)
1395 .sort((a, b) => b.updatedAt - a.updatedAt);
1396 if (!maps.length) return;
1397 const current = Math.max(0, maps.findIndex(map => map.id === state.id));
1398 switchMap(maps[Math.max(0, Math.min(maps.length - 1, current + offset))].id);
1399 }
1400
1401 function focusConversationSearch() {
1402 document.body.classList.remove('history-collapsed', 'map-open');
1403 if (matchMedia('(max-width: 1100px)').matches) document.body.classList.add('history-open');
1404 updateHistoryToggle();
1405 els.conversationSearch.focus();
1406 els.conversationSearch.select();
1407 }
1408
1409 function handleVimNavigation(event) {
1410 if (event.defaultPrevented || event.ctrlKey || event.metaKey || event.altKey) return;
1411 const editable = event.target.closest?.('input, textarea, select, [contenteditable="true"]');
1412 if (editable) {
1413 if (event.key === 'Escape') {
1414 event.preventDefault();
1415 if (editable === els.conversationSearch) clearSearch();
1416 editable.blur();
1417 }
1418 return;
1419 }
1420 if ($('dialog[open]')) return;
1421 if (pendingG && event.key !== 'g') {
1422 clearTimeout(pendingGTimer);
1423 pendingG = false;
1424 }
1425 if (event.key === '?') { event.preventDefault(); els.shortcutsDialog.showModal(); return; }
1426 if (event.key === '/') { event.preventDefault(); focusConversationSearch(); return; }
1427 if (event.key === 'i') { event.preventDefault(); els.prompt.focus(); return; }
1428 if (event.key === 'j') { event.preventDefault(); moveVisibleNode(1); return; }
1429 if (event.key === 'k') { event.preventDefault(); moveVisibleNode(-1); return; }
1430 if (event.key === 'J') { event.preventDefault(); moveMap(1); return; }
1431 if (event.key === 'K') { event.preventDefault(); moveMap(-1); return; }
1432 if (event.key === 'h') {
1433 const parentId = nodeById(state.activeId)?.parentId;
1434 if (parentId) { event.preventDefault(); activateNode(parentId); }
1435 return;
1436 }
1437 if (event.key === 'l') {
1438 const children = childrenOf(state.activeId);
1439 if (!children.length) return;
1440 event.preventDefault();
1441 if (state.collapsedIds.includes(state.activeId)) toggleSubtree(state.activeId, false);
1442 else activateNode(children[0].id);
1443 return;
1444 }
1445 if (event.key === ' ') {
1446 if (childrenOf(state.activeId).length) { event.preventDefault(); toggleSubtree(state.activeId); }
1447 return;
1448 }
1449 if (event.key === 'G') {
1450 const ids = visibleTreeNodeIds();
1451 if (ids.length) { event.preventDefault(); activateNode(ids.at(-1)); }
1452 return;
1453 }
1454 if (event.key === 'g') {
1455 event.preventDefault();
1456 if (pendingG) {
1457 clearTimeout(pendingGTimer);
1458 pendingG = false;
1459 const ids = visibleTreeNodeIds();
1460 if (ids.length) activateNode(ids[0]);
1461 } else {
1462 pendingG = true;
1463 pendingGTimer = setTimeout(() => { pendingG = false; }, 900);
1464 }
1465 }
1466 }
1467
1468 function closeHistoryOnSmallScreen() {
1469 if (matchMedia('(max-width: 1100px)').matches) document.body.classList.remove('history-open');
1470 updateHistoryToggle();
1471 }
1472
1473 function updateHistoryToggle() {
1474 const small = matchMedia('(max-width: 1100px)').matches;
1475 const open = small ? document.body.classList.contains('history-open') : !document.body.classList.contains('history-collapsed');
1476 els.historyToggle.setAttribute('aria-expanded', String(open));
1477 }
1478
1479 function toggleHistory() {
1480 if (matchMedia('(max-width: 1100px)').matches) {
1481 document.body.classList.remove('history-collapsed');
1482 document.body.classList.toggle('history-open');
1483 if (document.body.classList.contains('history-open')) document.body.classList.remove('map-open');
1484 } else document.body.classList.toggle('history-collapsed');
1485 updateHistoryToggle();
1486 }
1487
1488 function clearChatHistory(message = 'Clear all saved conversations? Your API key and usage records will be kept. Uploaded API files will not be deleted.') {
1489 if (!workspace.maps.some(map => map.nodes.length || map.attachments.length)) { showToast('Chat history is already empty'); return false; }
1490 if (!confirm(message)) return false;
1491 if (activeRequest) activeRequest.abort();
1492 const map = blankMap();
1493 workspace = { version: 2, maps: [map], activeMapId: map.id };
1494 state = map;
1495 searchIndex = null;
1496 els.conversationSearch.value = '';
1497 persistNow();
1498 renderAll();
1499 showToast('All conversations cleared');
1500 return true;
1501 }
1502
1503 function deleteMap(mapId) {
1504 const map = workspace.maps.find(candidate => candidate.id === mapId);
1505 if (!map) return;
1506 if (uploadingFiles && uploadTargetMapId === map.id) { showToast('Wait for this map’s file upload to finish'); return; }
1507 const remoteNote = map.attachments.length ? ' Uploaded API files will not be deleted.' : '';
1508 if (!confirm(`Delete “${map.title}” and its entire conversation? This cannot be undone.${remoteNote}`)) return;
1509 if (activeRequest && map.nodes.some(node => node.status === 'loading')) activeRequest.abort();
1510
1511 workspace.maps = workspace.maps.filter(candidate => candidate.id !== map.id);
1512 searchIndex = null;
1513 if (!workspace.maps.length) workspace.maps.push(blankMap());
1514 if (state === map) {
1515 const next = [...workspace.maps]
1516 .filter(candidate => candidate.nodes.length || candidate.attachments.length)
1517 .sort((a, b) => b.updatedAt - a.updatedAt)[0] || workspace.maps[0];
1518 workspace.activeMapId = next.id;
1519 state = next;
1520 state.activeId = state.nodes.at(-1)?.id || null;
1521 revealNode(state, state.activeId);
1522 }
1523 persistNow();
1524 renderAll({ scroll: state.activeId ? 'bottom' : false });
1525 showToast('Conversation deleted');
1526 }
1527
1528 function renameMap(mapId) {
1529 const map = workspace.maps.find(candidate => candidate.id === mapId);
1530 if (!map) return;
1531 const value = prompt('Rename this conversation. Leave blank to restore its automatic title.', map.title);
1532 if (value === null) return;
1533 const title = value.replace(/\s+/g, ' ').trim();
1534 if (title) {
1535 map.title = title.slice(0, 120);
1536 map.titleCustom = true;
1537 } else {
1538 map.titleCustom = false;
1539 refreshMapTitle(map);
1540 }
1541 touchMap(map);
1542 persistNow();
1543 renderHistory();
1544 showToast(title ? 'Conversation renamed' : 'Automatic title restored');
1545 }
1546
1547 function showSelectionMenu(text, nodeId, rect) {
1548 selectedText = { text: text.slice(0, 5000), nodeId };
1549 els.selectionPreview.textContent = text.length > 240 ? `${text.slice(0, 240)}…` : text;
1550 els.selectionMenu.hidden = false;
1551 const width = 330;
1552 const left = Math.max(12, Math.min(innerWidth - width - 12, rect.left + rect.width / 2 - width / 2));
1553 const estimatedHeight = 235;
1554 const top = rect.bottom + estimatedHeight < innerHeight ? rect.bottom + 10 : Math.max(10, rect.top - estimatedHeight - 8);
1555 Object.assign(els.selectionMenu.style, { left: `${left}px`, top: `${top}px` });
1556 }
1557
1558 function hideSelectionMenu() { els.selectionMenu.hidden = true; selectedText = null; }
1559
1560 els.composer.addEventListener('submit', event => {
1561 event.preventDefault();
1562 if (activeRequest) { activeRequest.abort(); return; }
1563 const question = els.prompt.value;
1564 els.prompt.value = '';
1565 els.prompt.style.height = '';
1566 ask(question);
1567 });
1568 els.prompt.addEventListener('keydown', event => {
1569 if (event.key === 'Enter' && !event.shiftKey && !event.isComposing) { event.preventDefault(); els.composer.requestSubmit(); }
1570 });
1571 els.prompt.addEventListener('input', () => {
1572 els.prompt.style.height = 'auto';
1573 els.prompt.style.height = `${Math.min(els.prompt.scrollHeight, 180)}px`;
1574 });
1575 document.addEventListener('click', event => {
1576 const starter = event.target.closest('.starter');
1577 if (starter) { els.prompt.value = starter.dataset.prompt; els.prompt.focus(); }
1578 const historyItem = event.target.closest('.history-item');
1579 if (historyItem) { switchMap(historyItem.dataset.mapId); return; }
1580 const searchResult = event.target.closest('.search-result');
1581 if (searchResult) {
1582 const { mapId, nodeId } = searchResult.dataset;
1583 clearSearch();
1584 switchMap(mapId, nodeId || null);
1585 return;
1586 }
1587 const renameConversation = event.target.closest('.rename-map');
1588 if (renameConversation) { renameMap(renameConversation.dataset.mapId); return; }
1589 const deleteConversation = event.target.closest('.delete-map');
1590 if (deleteConversation) { deleteMap(deleteConversation.dataset.mapId); return; }
1591 const removeFile = event.target.closest('.remove-attachment');
1592 if (removeFile) { removeAttachment(removeFile.dataset.fileId); return; }
1593 const subtreeToggle = event.target.closest('.toggle-subtree');
1594 if (subtreeToggle) { toggleSubtree(subtreeToggle.dataset.nodeId); return; }
1595 const treeNode = event.target.closest('.tree-node');
1596 if (treeNode) { activateNode(treeNode.dataset.nodeId); return; }
1597 const branch = event.target.closest('.branch-here');
1598 if (branch) { state.activeId = branch.closest('.message').dataset.nodeId; persistSoon(); renderAll(); els.prompt.focus(); }
1599 const retry = event.target.closest('.retry-node');
1600 if (retry) { const old = nodeById(retry.closest('.message').dataset.nodeId); state.activeId = old.parentId; ask(old.question, old.parentId); }
1601 const copy = event.target.closest('.copy-answer');
1602 if (copy) { const node = nodeById(copy.closest('.message').dataset.nodeId); navigator.clipboard.writeText(node.answer).then(() => showToast('Answer copied')); }
1603 });
1604 document.addEventListener('mouseup', event => {
1605 if (event.target.closest('.selection-menu')) return;
1606 requestAnimationFrame(() => {
1607 const selection = getSelection();
1608 const text = selection?.toString().trim();
1609 if (!text || text.length < 2 || !selection.rangeCount) return;
1610 const answer = selection.anchorNode?.parentElement?.closest('.answer-body');
1611 if (!answer || !answer.contains(selection.focusNode)) return;
1612 const message = answer.closest('.message');
1613 showSelectionMenu(text, message.dataset.nodeId, selection.getRangeAt(0).getBoundingClientRect());
1614 });
1615 });
1616
1617 $('#ask-selection').addEventListener('click', () => {
1618 if (!selectedText) return;
1619 const action = els.selectionAction.value === 'custom' ? els.selectionCustom.value.trim() : els.selectionAction.value;
1620 if (!action) { els.selectionCustom.focus(); return; }
1621 const question = `${action}\n\nSelected passage:\n> ${selectedText.text.replace(/\n/g, '\n> ')}`;
1622 const parentId = selectedText.nodeId;
1623 hideSelectionMenu();
1624 getSelection()?.removeAllRanges();
1625 ask(question, parentId);
1626 });
1627 els.selectionAction.addEventListener('change', () => {
1628 els.selectionCustom.hidden = els.selectionAction.value !== 'custom';
1629 if (!els.selectionCustom.hidden) els.selectionCustom.focus();
1630 });
1631 $('#close-selection').addEventListener('click', hideSelectionMenu);
1632 window.addEventListener('scroll', hideSelectionMenu, { passive: true });
1633 $('#open-settings').addEventListener('click', openSettings);
1634 els.activeConnection.addEventListener('click', openSettings);
1635 $('#open-usage').addEventListener('click', openUsage);
1636 $('#refresh-actual-spend').addEventListener('click', refreshActualSpend);
1637 $('#theme-toggle').addEventListener('click', toggleTheme);
1638 $('#toggle-history').addEventListener('click', toggleHistory);
1639 els.conversationSearch.addEventListener('input', () => {
1640 clearTimeout(searchTimer);
1641 searchTimer = setTimeout(renderSearchResults, 110);
1642 });
1643 els.conversationSearch.addEventListener('keydown', event => {
1644 if (event.key !== 'Enter') return;
1645 const first = $('.search-result', els.searchResults);
1646 if (first) { event.preventDefault(); first.click(); }
1647 });
1648 $('#study-lab-home').addEventListener('click', event => { event.preventDefault(); createNewMap(); });
1649 $('#new-map-sidebar').addEventListener('click', createNewMap);
1650 els.uploadFile.addEventListener('click', () => els.fileInput.click());
1651 els.fileInput.addEventListener('change', () => uploadFiles(els.fileInput.files));
1652 $('#close-settings').addEventListener('click', () => els.settings.close());
1653 els.settings.addEventListener('close', () => { settingsDraft = null; });
1654 $('#close-usage').addEventListener('click', () => els.usageDialog.close());
1655 $('#open-shortcuts').addEventListener('click', () => els.shortcutsDialog.showModal());
1656 $('#close-shortcuts').addEventListener('click', () => els.shortcutsDialog.close());
1657 $('#expand-all-nodes').addEventListener('click', () => setAllSubtrees(false));
1658 $('#collapse-all-nodes').addEventListener('click', () => setAllSubtrees(true));
1659 $('#zoom-out-tree').addEventListener('click', () => updateTreeZoom(-.1));
1660 $('#zoom-in-tree').addEventListener('click', () => updateTreeZoom(.1));
1661 $('#reset-usage').addEventListener('click', () => {
1662 if (!usageRecords.length || confirm('Reset the locally tracked API usage history? This cannot be undone.')) {
1663 usageRecords = [];
1664 localStorage.removeItem(USAGE_KEY);
1665 updateUsageButton();
1666 renderUsage();
1667 showToast('Local usage history reset');
1668 }
1669 });
1670 document.querySelectorAll('.toggle-key').forEach(button => button.addEventListener('click', event => {
1671 const input = document.getElementById(event.currentTarget.dataset.keyInput);
1672 const show = input.type === 'password';
1673 input.type = show ? 'text' : 'password';
1674 event.currentTarget.textContent = show ? 'Hide' : 'Show';
1675 const keyName = input.id === 'openrouter-api-key' ? 'OpenRouter' : input.id === 'openai-admin-key' ? 'OpenAI Admin' : 'OpenAI';
1676 event.currentTarget.setAttribute('aria-label', `${show ? 'Hide' : 'Show'} ${keyName} API key`);
1677 }));
1678 $('#add-model').addEventListener('click', () => {
1679 captureSettingsForm();
1680 const id = uid();
1681 settingsDraft.models.push({ id, provider: 'openai', model: PROVIDERS.openai.model, apiUrl: PROVIDERS.openai.apiUrl });
1682 renderModelCards();
1683 $('.model-name-input', els.modelConfigs.lastElementChild)?.focus();
1684 });
1685 els.modelConfigs.addEventListener('change', event => {
1686 if (event.target.matches('.default-model-radio')) { updateModelCardSelection(); return; }
1687 if (!event.target.matches('.model-provider')) return;
1688 const card = event.target.closest('[data-model-card]');
1689 const previousProvider = card.dataset.provider;
1690 const provider = event.target.value;
1691 captureSettingsForm();
1692 const connection = settingsDraft.models.find(model => model.id === card.dataset.modelId);
1693 if (connection.model === PROVIDERS[previousProvider].model) connection.model = PROVIDERS[provider].model;
1694 if (connection.apiUrl === PROVIDERS[previousProvider].apiUrl) connection.apiUrl = PROVIDERS[provider].apiUrl;
1695 connection.provider = provider;
1696 renderModelCards();
1697 });
1698 els.modelConfigs.addEventListener('input', event => {
1699 if (!event.target.matches('.model-name-input')) return;
1700 const card = event.target.closest('[data-model-card]');
1701 const preview = $('.model-price', card);
1702 if (preview) preview.textContent = 'Checking pricing…';
1703 clearTimeout(modelPriceTimer);
1704 modelPriceTimer = setTimeout(() => updateModelPrice(card), 350);
1705 });
1706 els.modelConfigs.addEventListener('click', event => {
1707 const button = event.target.closest('.remove-model');
1708 if (!button || button.disabled) return;
1709 const id = button.closest('[data-model-card]').dataset.modelId;
1710 captureSettingsForm();
1711 settingsDraft.models = settingsDraft.models.filter(model => model.id !== id);
1712 if (settingsDraft.activeModelId === id) settingsDraft.activeModelId = settingsDraft.models[0].id;
1713 renderModelCards();
1714 });
1715 $('#settings-form').addEventListener('submit', event => {
1716 event.preventDefault();
1717 captureSettingsForm();
1718 settings = normalizeSettings({ ...settingsDraft, systemPrompt: els.systemPrompt.value.trim() });
1719 localStorage.setItem(SETTINGS_KEY, JSON.stringify(settings));
1720 settingsDraft = null;
1721 updateKeyStatus(); renderAttachments(); els.settings.close(); showToast(`${providerLabel()} settings saved`);
1722 });
1723 $('#clear-history').addEventListener('click', () => clearChatHistory());
1724 $('#clear-branch').addEventListener('click', () => { state.activeId = state.nodes.at(-1)?.id || null; revealNode(state, state.activeId); persistSoon(); renderAll({ scroll: true }); });
1725 $('#collapse-map').addEventListener('click', () => { document.body.classList.remove('map-open'); document.body.classList.add('map-collapsed'); $('#expand-map').hidden = false; });
1726 $('#expand-map').addEventListener('click', () => { document.body.classList.remove('map-collapsed', 'history-open'); document.body.classList.add('map-open'); $('#expand-map').hidden = true; updateHistoryToggle(); });
1727 addEventListener('resize', updateHistoryToggle, { passive: true });
1728 document.addEventListener('keydown', handleVimNavigation);
1729
1730 const installButton = $('#install-app');
1731 window.addEventListener('beforeinstallprompt', event => {
1732 event.preventDefault();
1733 installPrompt = event;
1734 installButton.hidden = false;
1735 });
1736 window.addEventListener('appinstalled', () => {
1737 installPrompt = null;
1738 installButton.hidden = true;
1739 showToast('Study Lab installed');
1740 });
1741 installButton.addEventListener('click', async () => {
1742 if (!installPrompt) return;
1743 installPrompt.prompt();
1744 await installPrompt.userChoice;
1745 installPrompt = null;
1746 installButton.hidden = true;
1747 });
1748
1749 if ('serviceWorker' in navigator) {
1750 window.addEventListener('load', () => {
1751 navigator.serviceWorker.register('./service-worker.js').catch(error => {
1752 console.warn('Study Lab service worker registration failed:', error);
1753 });
1754 });
1755 }
1756
1757 updateKeyStatus();
1758 updateThemeButton();
1759 updateUsageButton();
1760 updateHistoryToggle();
1761 updateTreeZoom();
1762 state.activeId = state.nodes.at(-1)?.id || null;
1763 revealNode(state, state.activeId);
1764 renderAll();
1765})();