index.ts

1import {2  detectCardForm,3  detectLoginFields,4  findOTPDigitBoxGroup,5  findOtpSignalingGroup,6  getDeepActiveInput,7  getPageDomain,8  isAnyCredentialForm,9  isEmailFirstForm,10  isLoginForm,11  isSignupForm,12  isTOTPField,13  isVisible,14} from "./detect";15import {16  type CardSelectorEntry,17  injectFieldIcon,18  type SelectorEntry,19  showAutofillSelector,20  showCardSelector,21  showPasskeyAvailable,22  showPasskeyProGate,23  showRememberSiteToast,24  showTotpCopyToast,25  showTOTPSelector,26} from "./inject";27import { detectBrowser } from "../shared/browser";28import { fillAllowed, fillCardForm, fillFields, fillOTPDigitBoxes, fillTOTPCode, setNativeValue } from "./fill";29import { resolveAutofillInteractionTargets } from "./interaction";30import { setupSaveDetection } from "./save";31import { contentMLDetector } from "./content-ml-detector";32import { detectPasswordPolicy } from "./policy";33import type { FieldPrediction } from "../shared/ml";34import type { VaultEntry } from "../shared/types";35import { setPasskeyToastClosedListener } from "./passkey-toast/lifecycle";3637// WeakMap (not WeakSet) — we keep the per-input cleanup callback as the value38// so we can tear down listeners if we ever need to re-process the same field.39// When the input is GC'd (SPA nav, React re-render), the map entry goes with40// it and we can re-inject without leaking the old handler.41const processedInputs = new WeakMap<HTMLInputElement, () => void>();42const AUTOFILL_FIELD_TYPES = new Set(["password", "username", "email"]);4344let currentDismiss: (() => void) | null = null;45// Field whose selector is currently open — used to avoid dismiss+reopen flicker46let currentAnchorField: HTMLInputElement | null = null;47// Prevents two concurrent handleFieldInteraction calls for the same field48const pendingInteractions = new WeakSet<HTMLInputElement>();49// Tracks the last field the user explicitly dismissed (Escape / click-outside / Tab).50// Suppresses spurious reopens until focus moves to a different field. Layer 151// of the dismissal model — see Projects.md §4.12.52let lastDismissedField: HTMLInputElement | null = null;5354// ── Dismissal lock (Layer 2) ────────────────────────────────────────55// After any user-initiated dismiss, briefly block ALL reopens regardless of56// which field is focused. Catches the case where a page rapidly moves focus57// between fields after Escape — without this, focus moving to a SECOND field58// in <100ms would re-trigger the popup before the user finished dismissing.59const DISMISS_LOCK_MS = 800;60let dismissLock = false;61let dismissLockTimer: ReturnType<typeof setTimeout> | null = null;62// Set when the inline popup was summoned specifically for a passkey-unlock63// flow. The VAULT_UNLOCKED handler checks this to skip re-triggering autofill64// (the passkey toast handles the next step instead).65let passkeySummonActive = false;66// Set while the passkey approval toast is visible. Prevents handleFieldInteraction67// from opening the autofill selector alongside it. Cleared by the isolated-world68// toast lifecycle channel when the toast closes (and by DISMISS_PASSKEY_TOAST).69let passkeyToastActive = false;70let passkeyToastToken: string | null = null;71function startDismissLock(): void {72  dismissLock = true;73  if (dismissLockTimer) clearTimeout(dismissLockTimer);74  dismissLockTimer = setTimeout(() => { dismissLock = false; }, DISMISS_LOCK_MS);75}76function canOpen(): boolean { return !dismissLock; }7778// ── Fill-success lock ───────────────────────────────────────────────79// After Peach autofills a form, the popup must NOT reappear on the filled80// fields, on the submit button (some sites refocus it briefly), or on any81// field in that form — even when host-page DOM mutations or the form's own82// validation flow refocus an input. Implemented as a WeakSet of forms plus83// a page-level timestamp:84//   - filledForms: every form Peach has filled this page session. Survives85//     until the form leaves the DOM (WeakSet GC).86//   - pageFilledAt: timestamp of last fill. Used as a 3s belt-and-suspenders87//     window for fields that aren't inside a <form> element (some SPAs).88// SPA navigation resets pageFilledAt via the urlObserver below; filledForms89// self-empties as old form elements get GC'd.90const filledForms = new WeakSet<HTMLFormElement>();91let pageFilledAt: number | null = null;92const PAGE_FILL_GRACE_MS = 3000;9394function recordFillSuccess(...fields: (HTMLInputElement | null | undefined)[]): void {95  for (const f of fields) {96    if (!f) continue;97    const form = f.closest("form");98    if (form) filledForms.add(form);99  }100  pageFilledAt = Date.now();101}102103export /* @testable */ function wasAlreadyFilled(field: HTMLInputElement): boolean {104  const form = field.closest("form");105  if (form && filledForms.has(form)) return true;106  if (pageFilledAt !== null && Date.now() - pageFilledAt < PAGE_FILL_GRACE_MS) return true;107  return false;108}109110function clearFillStateForExplicitSummon(field: HTMLInputElement): void {111  const form = field.closest("form");112  if (form) filledForms.delete(form);113  pageFilledAt = null;114}115116// Some sites briefly focus the submit button when the user clicks it (visual117// feedback, blur/focus dance for validation animations). Catch those at the118// focusin layer so we don't re-trigger handleFieldInteraction for an event119// target that was never going to be a credential field anyway.120function isSubmitButton(el: EventTarget | null): boolean {121  if (!(el instanceof HTMLElement)) return false;122  if (el instanceof HTMLButtonElement && el.type !== "button") return true;123  if (el instanceof HTMLInputElement && el.type === "submit") return true;124  if (el.getAttribute("type") === "submit") return true;125  const text = (el.textContent?.trim() ?? el.getAttribute("value") ?? "").toLowerCase();126  if (!text || text.length > 24) return false;127  return /^(submit|sign[ -]?in|log[ -]?in|continue|next|go)$/i.test(text);128}129130function debounce<T extends (...args: unknown[]) => void>(131  fn: T,132  ms: number133): (...args: Parameters<T>) => void {134  let timer: ReturnType<typeof setTimeout>;135  return (...args: Parameters<T>) => {136    clearTimeout(timer);137    timer = setTimeout(() => fn(...args), ms);138  };139}140141function showToast(message: string): void {142  const toast = document.createElement("div");143  toast.style.cssText = `144    position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);145    background: #131109; color: #F0E8D8; padding: 8px 16px;146    border-radius: 8px; font-family: 'IBM Plex Mono', monospace;147    font-size: 11px; z-index: 2147483647; opacity: 0;148    transition: opacity 200ms ease;149    border: 1px solid rgba(240,232,216,0.07);150    pointer-events: none;151  `;152  toast.textContent = message;153  document.body.appendChild(toast);154  requestAnimationFrame(() => { toast.style.opacity = "1"; });155  setTimeout(() => {156    toast.style.opacity = "0";157    setTimeout(() => toast.remove(), 200);158  }, 2000);159}160161function showSearchPalette(capability?: string): void {162  const host = document.createElement("div");163  host.style.cssText = "position:fixed;top:80px;left:50%;transform:translateX(-50%);z-index:2147483647;width:340px;";164  document.body.appendChild(host);165  const shadow = host.attachShadow({ mode: "closed" });166167  const style = document.createElement("style");168  style.textContent = `169    .p{background:#131109;border:1px solid rgba(240,232,216,.12);border-radius:12px;170      font-family:'IBM Plex Mono',monospace;font-size:12px;color:#F0E8D8;171      box-shadow:0 8px 24px rgba(0,0,0,.5);overflow:hidden}172    .h{padding:10px 12px 8px;border-bottom:1px solid rgba(240,232,216,.08);173      font-size:11px;color:rgba(240,232,216,.5);display:flex;justify-content:space-between;align-items:center}174    .x{background:none;border:none;color:rgba(240,232,216,.4);cursor:pointer;font-size:14px;padding:0;line-height:1}175    .s{padding:8px 12px}176    .s input{width:100%;box-sizing:border-box;background:rgba(240,232,216,.06);177      border:1px solid rgba(240,232,216,.12);border-radius:6px;color:#F0E8D8;178      padding:6px 8px;font-family:inherit;font-size:12px;outline:none}179    .l{max-height:220px;overflow-y:auto}180    .e{padding:8px 12px;cursor:pointer;display:flex;flex-direction:column;gap:2px}181    .e:hover{background:rgba(240,232,216,.06)}182    .et{font-size:12px}183    .eu{font-size:10px;color:rgba(240,232,216,.45)}184    .em{padding:12px;color:rgba(240,232,216,.4);text-align:center}185  `;186187  let allEntries: SelectorEntry[] = [];188  let query = "";189190  const panel = document.createElement("div");191  panel.className = "p";192193  const hdr = document.createElement("div");194  hdr.className = "h";195  const hdrText = document.createElement("span");196  hdrText.textContent = "No form detected — search your vault";197  const closeBtn = document.createElement("button");198  closeBtn.className = "x";199  closeBtn.textContent = "✕";200  hdr.appendChild(hdrText);201  hdr.appendChild(closeBtn);202203  const searchWrap = document.createElement("div");204  searchWrap.className = "s";205  const searchInput = document.createElement("input");206  searchInput.placeholder = "search...";207  searchWrap.appendChild(searchInput);208209  const list = document.createElement("div");210  list.className = "l";211212  panel.appendChild(hdr);213  panel.appendChild(searchWrap);214  panel.appendChild(list);215  shadow.appendChild(style);216  shadow.appendChild(panel);217218  function close() { host.remove(); }219220  closeBtn.onclick = close;221222  function onKeyDown(e: KeyboardEvent) {223    if (e.key === "Escape") { close(); document.removeEventListener("keydown", onKeyDown, true); }224  }225  document.addEventListener("keydown", onKeyDown, true);226227  function render() {228    const q = query.toLowerCase();229    const filtered = q230      ? allEntries.filter(e => e.title.toLowerCase().includes(q) || (e.username ?? "").toLowerCase().includes(q))231      : allEntries;232    list.innerHTML = "";233    if (filtered.length === 0) {234      const em = document.createElement("div");235      em.className = "em";236      em.textContent = query ? "no matches" : "vault is empty";237      list.appendChild(em);238      return;239    }240    for (const entry of filtered.slice(0, 20)) {241      const row = document.createElement("div");242      row.className = "e";243      const title = document.createElement("div");244      title.className = "et";245      title.textContent = entry.title;246      row.appendChild(title);247      if (entry.username) {248        const user = document.createElement("div");249        user.className = "eu";250        user.textContent = entry.username;251        row.appendChild(user);252      }253      row.onclick = async () => {254        // MV-1: vault-wide search list is a cross-domain summon — the user255        // explicitly picked this entry to fill on this page.256        const resp = await chrome.runtime.sendMessage({ type: "GET_ENTRY_FOR_FILL", payload: { id: entry.id, capability } });257        const r = resp as { ok: boolean; data?: { password?: string } };258        if (r.ok && r.data?.password) {259          let alreadyWritten = false;260          try {261            await navigator.clipboard.writeText(r.data.password);262            alreadyWritten = true;263          } catch (err) {264            console.warn("[Peach] clipboard write denied:", err);265          }266          const copyResp = await chrome.runtime.sendMessage({267            type: "COPY",268            payload: { text: r.data.password, label: "Password", alreadyWritten },269          }) as { ok?: boolean } | undefined;270          if (alreadyWritten || copyResp?.ok) {271            showToast("Password copied");272          } else {273            showToast("Could not copy password — clipboard blocked");274          }275        } else {276          showToast("Could not copy password");277        }278        close();279        document.removeEventListener("keydown", onKeyDown, true);280      };281      list.appendChild(row);282    }283  }284285  searchInput.oninput = () => { query = searchInput.value; render(); };286287  // The browser-issued command capability, not page UI state, authorizes the288  // vault-wide inventory.289  fetchAutofillEntries(getPageDomain(), true, capability).then(result => {290    if (result.locked) { showToast("Vault is locked — open Peach to unlock"); close(); return; }291    allEntries = result.entries;292    render();293    searchInput.focus();294  });295}296297function findTOTPField(root: Document | Element = document): HTMLInputElement | null {298  const inputs = root.querySelectorAll<HTMLInputElement>("input");299  for (const input of inputs) {300    if (isTOTPField(input)) return input;301  }302  return null;303}304305function findSameLoginTOTPField(passwordEl: HTMLInputElement): HTMLInputElement | null {306  const form = passwordEl.closest("form");307  return findTOTPField(form ?? document);308}309310311async function handleAutofill(312  _field: HTMLInputElement,313  usernameEl: HTMLInputElement | null,314  passwordEl: HTMLInputElement | null,315  entry: VaultEntry,316  emailEl?: HTMLInputElement | null317): Promise<{ filledTOTPField: HTMLInputElement | null; gatePassed: boolean }> {318  if (!entry.username && !entry.password && !entry.email) return { filledTOTPField: null, gatePassed: false };319  const pageDomain = getPageDomain();320  const form = (passwordEl ?? usernameEl)?.closest("form") as HTMLFormElement | null ?? null;321  // Fill the email field with entry.email if set; fall back to entry.username when322  // it looks like an email address (sites that store email-as-username and have a323  // separate email field on signup forms).324  const emailValue = entry.email ?? (entry.username?.includes("@") ? entry.username : "");325  const gatePassed = fillFields(usernameEl, passwordEl, entry.username ?? "", entry.password ?? "", form, pageDomain, emailEl, emailValue);326  let filledTOTPField: HTMLInputElement | null = null;327328  if (entry.canary && gatePassed) {329    chrome.runtime.sendMessage({330      type: "FIRE_CANARY_PING",331      payload: {332        webhookUrl: entry.canary.webhookUrl,333        entryTitle: entry.title,334        trigger: "autofilled",335      },336    }).catch(() => {});337    chrome.runtime.sendMessage({338      type: "UPDATE_ENTRY",339      payload: {340        id: entry.id,341        patch: {342          canary: {343            ...entry.canary,344            lastPinged: Date.now(),345            pingCount: (entry.canary.pingCount ?? 0) + 1,346          },347        },348      },349    }).catch(() => {});350  }351352  // The background sends a freshly-generated 6-digit code (totpCode), never the353  // base32 seed (SEV-3-C). Fill the code straight in.354  const totpCode = (entry as { totpCode?: string }).totpCode;355  if (totpCode && gatePassed) {356    const code = totpCode;357    const totpField = passwordEl ? findSameLoginTOTPField(passwordEl) : null;358    if (fillTOTPCode(totpField, code, form, pageDomain)) {359      filledTOTPField = totpField;360    }361    let alreadyWritten = false;362    try {363      await navigator.clipboard.writeText(code);364      alreadyWritten = true;365    } catch (err) {366      console.warn("[Peach] clipboard write denied:", err);367    }368    const response = await chrome.runtime.sendMessage({369      type: "COPY",370      payload: { text: code, label: "TOTP", alreadyWritten },371    });372    const res = response as { ok?: boolean; clearSeconds?: number };373    if (filledTOTPField) {374      showToast("2FA code filled");375    } else if (alreadyWritten || res.ok) {376      // Don't render the live code into the toast — the page can read it from the377      // DOM and consume the one-time code (audit LOW). The code is already on the378      // clipboard; the toast confirms the copy and shows how long until the379      // clipboard self-clears (Addendum 2). 30 mirrors DEFAULT_CLEAR_SECONDS.380      showTotpCopyToast(res.clearSeconds ?? 30);381    } else {382      showToast("Could not copy TOTP — clipboard blocked");383    }384  }385386  return { filledTOTPField, gatePassed };387}388389async function fetchAutofillEntries(390  domain: string,391  includeAll = false,392  capability?: string393): Promise<{ entries: SelectorEntry[]; locked: boolean }> {394  const response = await chrome.runtime.sendMessage({395    type: "AUTOFILL_QUERY",396    payload: { domain, includeAll, capability },397  });398  const res = response as { ok: boolean; data?: SelectorEntry[]; error?: string };399  if (!res.ok && res.error === "vault_locked") {400    return { entries: [], locked: true };401  }402  return { entries: res.data ?? [], locked: false };403}404405async function fetchTOTPEntries(406  domain: string,407  capability?: string,408): Promise<{ entries: SelectorEntry[]; locked: boolean }> {409  const response = await chrome.runtime.sendMessage({410    type: "AUTOFILL_QUERY",411    payload: { domain, kind: "totp", capability },412  });413  const res = response as { ok: boolean; data?: SelectorEntry[]; error?: string };414  if (!res.ok && res.error === "vault_locked") {415    return { entries: [], locked: true };416  }417  return { entries: res.data ?? [], locked: false };418}419420421function resolveAutofillFieldType(422  el: HTMLInputElement,423  predictedType?: FieldPrediction["type"] | null424): "password" | "username" | "email" | null {425  if (426    predictedType === "password" ||427    predictedType === "username" ||428    predictedType === "email"429  ) {430    return predictedType;431  }432433  const detected = detectLoginFields().find((field) => field.el === el)?.type;434  if (detected && AUTOFILL_FIELD_TYPES.has(detected)) {435    return detected;436  }437438  const htmlType = el.type.toLowerCase();439  if (htmlType === "password") return "password";440  if (htmlType === "email") return "email";441  return null;442}443444async function openAutofillSelector(445  anchorField: HTMLInputElement,446  usernameEl: HTMLInputElement | null,447  passwordEl: HTMLInputElement | null,448  domainEntries: SelectorEntry[],449  loadSearchableEntries: () => Promise<SelectorEntry[]>,450  domain: string,451  identityKind: "email" | "username",452  emailEl?: HTMLInputElement | null,453  capability?: string,454): Promise<void> {455  // No saved entries for this site → signup/new-account mode.456  // Locate the confirm-password field so "Copy & fill" can populate it too.457  const isSignup = domainEntries.length === 0;458  let confirmEl: HTMLInputElement | null = null;459  if (isSignup) {460    const form = (passwordEl ?? usernameEl)?.closest("form") ?? document.body;461    const allPwInputs = Array.from(form.querySelectorAll<HTMLInputElement>("input[type='password']"));462    confirmEl = allPwInputs.find(463      (el) => el !== passwordEl && /confirm|repeat|verify/i.test(el.name + el.id + el.placeholder)464    ) ?? (allPwInputs.length >= 2 ? allPwInputs.find((el) => el !== passwordEl) ?? null : null);465  }466467  currentDismiss?.();468  currentAnchorField = anchorField;469  currentDismiss = showAutofillSelector(470    anchorField,471    domainEntries,472    async (id: string) => {473      currentDismiss = null;474      currentAnchorField = null;475      const entryResponse = await chrome.runtime.sendMessage({476        type: "GET_ENTRY_FOR_FILL",477        payload: { id, capability },478      });479       const entry = (entryResponse as { ok: boolean; data?: VaultEntry }).data;480       if (entry) {481         const { filledTOTPField, gatePassed } = await handleAutofill(anchorField, usernameEl, passwordEl, entry, emailEl);482         if (gatePassed) recordFillSuccess(anchorField, usernameEl, passwordEl, filledTOTPField);483        // Offer to remember the current site for this entry only if none of484        // its known domains (primary + additional) match — otherwise the485        // user already mapped it and the prompt would be noise.486        const pageDomain = location.hostname.replace(/^www\./, "");487        const entryDomains = new Set<string>();488        for (const u of [entry.url, ...(entry.additionalUrls ?? [])]) {489          try {490            if (u) entryDomains.add(new URL(u).hostname.replace(/^www\./, ""));491          } catch { /* ignore unparseable */ }492        }493        if (pageDomain && entryDomains.size > 0 && !entryDomains.has(pageDomain)) {494          showRememberSiteToast(location.origin, entry.id);495        }496      }497    },498    {499      domain,500      capability,501      loadSearchableEntries,502      isSignup,503      identityKind,504      hasEmailField: !!emailEl,505      onFillFields: (username, password, email) => {506        const form = (passwordEl ?? usernameEl)?.closest("form") as HTMLFormElement | null ?? null;507        if (!fillFields(usernameEl, passwordEl, username, password, form, getPageDomain(), emailEl, email)) return;508        if (password && confirmEl) setNativeValue(confirmEl, password);509        recordFillSuccess(anchorField, usernameEl, passwordEl);510      },511      onDismiss: () => { lastDismissedField = anchorField; startDismissLock(); },512    }513  );514}515516async function openTOTPSelector(517  anchorField: HTMLInputElement,518  otpDigitBoxes?: HTMLInputElement[],519  capability?: string,520): Promise<void> {521  if (!canOpen()) return;522  if (currentDismiss && currentAnchorField === anchorField) return;523  if (anchorField !== lastDismissedField) lastDismissedField = null;524  if (anchorField === lastDismissedField) return;525  if (wasAlreadyFilled(anchorField)) return;526527  const domain = getPageDomain();528  const result = await fetchTOTPEntries(domain, capability);529530  if (result.locked) {531    currentDismiss?.();532    currentAnchorField = anchorField;533    currentDismiss = showAutofillSelector(534      anchorField,535      [],536      () => {},537      {538        domain,539        locked: true,540        onUnlocked: () => void openTOTPSelector(anchorField),541        onDismiss: () => { lastDismissedField = anchorField; startDismissLock(); },542      }543    );544    return;545  }546547  if (result.entries.length === 0) {548    lastDismissedField = anchorField;549    startDismissLock();550    showToast("No 2FA entries for this site — add a code in Peach first");551    return;552  }553554  currentDismiss?.();555  currentAnchorField = anchorField;556  currentDismiss = showTOTPSelector(557    anchorField,558    result.entries,559    async (id: string) => {560      try {561        const entryResponse = await chrome.runtime.sendMessage({562          type: "GET_ENTRY_FOR_FILL",563          payload: { id, capability },564        }).catch(() => null) as { ok: boolean; data?: VaultEntry } | null;565        const entry = entryResponse?.ok ? entryResponse.data : undefined;566        const code = (entry as { totpCode?: string } | undefined)?.totpCode;567        if (!code) return;568        if (!fillAllowed(anchorField.closest("form"), getPageDomain())) return;569        if (otpDigitBoxes && otpDigitBoxes.length > 1) {570          fillOTPDigitBoxes(otpDigitBoxes, code);571        } else {572          setNativeValue(anchorField, code);573        }574        recordFillSuccess(anchorField);575        showToast("2FA code filled");576      } finally {577        currentDismiss = null;578        currentAnchorField = null;579      }580    },581    {582      domain,583      onDismiss: () => {584        lastDismissedField = anchorField;585        startDismissLock();586        currentDismiss = null;587        currentAnchorField = null;588      },589    }590  );591}592593594export /* @testable */ async function handleFieldInteraction(595  anchorField?: HTMLInputElement | null,596  explicitSummon = false,597  capability?: string598): Promise<void> {599  const field = anchorField ?? getDeepActiveInput();600  if (!field) return;601  if (!isVisible(field)) return;602603  // Passkey toast is visible — don't open the credential selector alongside it.604  if (passkeyToastActive) return;605606  // Layer 2: post-dismiss global lock. Catches rapid focus moves between607  // fields immediately after Escape/click-outside.608  if (!canOpen()) return;609610  // If a selector is already open for this exact field, don't flicker it.611  if (currentDismiss && currentAnchorField === field) return;612613  // If focus moved to a different field, the previous per-field dismiss lock614  // no longer applies.615  if (field !== lastDismissedField) lastDismissedField = null;616  // Layer 1: the user explicitly dismissed this field's selector — don't617  // reopen it until focus has genuinely moved away and come back.618  if (field === lastDismissedField) return;619620  // Fill-success lock: Peach already filled this form (or fired a fill621  // anywhere on the page within the grace window). Sites often refocus an622  // input on submit click, on validation, or on a transition to a success623  // state — none of those should re-open the popup.624  if (wasAlreadyFilled(field)) return;625626  // Prevent two concurrent calls for the same field (e.g. focusin + icon click627  // firing simultaneously — the second call would dismiss the first's selector).628  if (pendingInteractions.has(field)) return;629  pendingInteractions.add(field);630631  try {632    // Multi-digit OTP entry: a group of digit boxes opens one selector anchored633    // on the first box and fills every box at once — never one icon per box.634    // findOTPDigitBoxGroup covers maxlength=1 boxes; findOtpSignalingGroup635    // covers boxes that carry OTP signaling (autocomplete=one-time-code,636    // name/id/label matches otp/totp/2fa) but lack maxlength="1".637    const otpGroup = findOTPDigitBoxGroup(field) ?? findOtpSignalingGroup(field);638    if (otpGroup) {639      await openTOTPSelector(otpGroup[0]!, otpGroup, capability);640      return;641    }642643    if (isTOTPField(field)) {644      const formFields = detectLoginFields();645      if (!isLoginForm(formFields) && !isSignupForm(formFields)) {646        await openTOTPSelector(field, undefined, capability);647        return;648      }649    }650651    const fieldType = field.type.toLowerCase();652653    const mlPromise = contentMLDetector.predictBatch([field]).then((preds) => {654      return preds[0] ?? null;655    });656657    const mlPrediction = await new Promise<FieldPrediction | null>((resolve) => {658      const timeout = setTimeout(() => resolve(null), 150);659      mlPromise.then((pred) => {660        clearTimeout(timeout);661        resolve(pred);662      });663    });664665    if (passkeyToastActive) return;666667    if (!explicitSummon && fieldType !== "password" && mlPrediction && mlPrediction.type !== "username" && mlPrediction.type !== "email") {668      return;669    }670671    const autofillFieldType = resolveAutofillFieldType(field, mlPrediction?.type);672    if (autofillFieldType) {673      reattachListeners(field, autofillFieldType);674    }675676    const fields = detectLoginFields();677    const targets = resolveAutofillInteractionTargets(field, fields, explicitSummon);678    if (!targets.shouldOpen) {679      return;680    }681682    const domain = getPageDomain();683    const commandAuthorized = explicitSummon && capability !== undefined;684    const firstResult = await fetchAutofillEntries(685      domain,686      commandAuthorized,687      commandAuthorized ? capability : undefined,688    );689    if (passkeyToastActive) return;690691    // Vault is locked — show an inline unlock prompt.692    // Re-triggering after unlock is handled by the VAULT_UNLOCKED message so693    // there is no double-trigger race between onUnlocked and the broadcast.694    if (firstResult.locked) {695      currentDismiss?.();696      currentAnchorField = field;697      currentDismiss = showAutofillSelector(698        field,699        [],700        () => {},701        { domain, locked: true, onDismiss: () => { lastDismissedField = field; startDismissLock(); } }702      );703      return;704    }705706    const entries = firstResult.entries;707    // MV-2: the vault-wide list is NOT fetched here. It is loaded lazily,708    // only when the user activates the search affordance inside the inline709    // popup (an explicit gesture), via the thunk below. Passive form focus710    // never ships the full account inventory into the page's content-script711    // world — and never hands out the entry ids that made MV-1 a full-vault712    // primitive.713    const loadSearchableEntries = async (): Promise<SelectorEntry[]> =>714      commandAuthorized715        ? entries716        : (await fetchAutofillEntries(domain)).entries;717718    if (passkeyToastActive) return;719720    const pwField = fields.find((f) => f.type === "password");721    // For email-first flows there is no password field on this step — that is expected.722    if (!explicitSummon && !pwField && !isEmailFirstForm(fields)) return;723    const usernameEl = targets.usernameEl;724    const passwordEl = targets.passwordEl;725    const emailEl = targets.emailEl;726727    await openAutofillSelector(728      field,729      usernameEl,730      passwordEl,731      entries,732      loadSearchableEntries,733      domain,734      autofillFieldType === "email" ? "email" : "username",735      emailEl,736      commandAuthorized ? capability : undefined,737    );738  } finally {739    pendingInteractions.delete(field);740  }741}742743async function onFocusIn(e: Event): Promise<void> {744  // Submit-button focus: catch the brief refocus some sites do when the745  // user clicks the login/submit button. Without this guard, that focus746  // event reaches handleFieldInteraction → getDeepActiveInput, and on747  // pages where the button is also a labelled <input> we briefly attempt748  // to open the popup over the very button the user just clicked.749  if (isSubmitButton(e.target)) return;750751  const field = e.target instanceof HTMLInputElement ? e.target : null;752  if (field) {753    const fields = detectLoginFields();754    if (isAnyCredentialForm(fields)) {755      const detected = fields.find((candidate) => candidate.el === field)?.type;756      reattachListeners(field, detected, fields);757    }758  }759760  await handleFieldInteraction();761}762763function reattachListeners(764  el: HTMLInputElement,765  detectedType?: "password" | "username" | "email",766  contextFields?: ReturnType<typeof detectLoginFields>767): void {768  if (processedInputs.has(el)) return;769  if (!resolveAutofillFieldType(el, detectedType)) return;770  // Only inject icon when a credential form is present on the page771  const fields = contextFields ?? detectLoginFields();772  if (!isAnyCredentialForm(fields)) return;773774  const cleanup = injectFieldIcon(el, () => {775    currentDismiss?.();776    currentDismiss = null;777    lastDismissedField = null; // icon click is an explicit user open — clear per-field lock778    dismissLock = false; // ...and the global lock779    if (dismissLockTimer) { clearTimeout(dismissLockTimer); dismissLockTimer = null; }780    clearFillStateForExplicitSummon(el);781    el.focus({ preventScroll: true });782    void handleFieldInteraction(el, true);783  });784  processedInputs.set(el, cleanup);785}786787const debouncedReattach = debounce(() => {788  const allFields = detectLoginFields();789  if (!isAnyCredentialForm(allFields)) return;790  const newFields = allFields.filter(791    (f) => AUTOFILL_FIELD_TYPES.has(f.type) && !processedInputs.has(f.el)792  );793  for (const f of newFields) {794    reattachListeners(f.el, f.type, allFields);795  }796  // 200ms debounce — below this, Peach and the host page's reactive layer797  // fight over the same layout properties every frame on React/Vue/Angular798  // login forms (v1.4.14 regression, Projects.md §4.7). Do not lower.799}, 200);800801function setupMutationObserver(): void {802  const observer = new MutationObserver(debouncedReattach);803  observer.observe(document.body, {804    childList: true,805    subtree: true,806    attributes: true,807    attributeFilter: ["type", "autocomplete", "name", "id", "placeholder", "hidden"],808  });809}810811export /* @testable */ function initialScan(aggressionLevel = 0, isFinalPass = false) {812  const allFields = detectLoginFields();813  const hasKnownForm = isAnyCredentialForm(allFields);814815  if (aggressionLevel === 0 && !hasKnownForm) return;816817  const newFields = allFields.filter(818    (f) => AUTOFILL_FIELD_TYPES.has(f.type) && !processedInputs.has(f.el)819  );820821  for (const f of newFields) {822    reattachListeners(f.el, f.type, allFields);823  }824825  // Level 2, final pass: inject icon on any visible password field even if826  // the form-context gate in reattachListeners would normally skip it.827  if (aggressionLevel >= 2 && isFinalPass && newFields.length === 0) {828    const pwInputs = document.querySelectorAll<HTMLInputElement>('input[type="password"]');829    for (const el of pwInputs) {830      if (isVisible(el) && !processedInputs.has(el)) {831        const cleanup = injectFieldIcon(el, () => {832          currentDismiss?.();833          currentDismiss = null;834          lastDismissedField = null;835          dismissLock = false;836          if (dismissLockTimer) { clearTimeout(dismissLockTimer); dismissLockTimer = null; }837          clearFillStateForExplicitSummon(el);838          el.focus({ preventScroll: true });839          void handleFieldInteraction(el, true);840        });841        processedInputs.set(el, cleanup);842      }843    }844  }845}846847// @testable seam — gives unit tests read/write access to module-private state848// without exposing it in the production API surface.849export const _testSeam = {850  getLastDismissedField(): HTMLInputElement | null { return lastDismissedField; },851  setLastDismissedField(f: HTMLInputElement | null): void { lastDismissedField = f; },852  isDismissLocked(): boolean { return dismissLock; },853  DISMISS_LOCK_MS,854} as const;855856// ── TOTP-only fields ───────────────────────────────────────────────────────857// After a username/password submission, many sites swap the whole form for a858// lone "verification code" input. The credential selector intentionally gates859// on login/signup forms, so TOTP fields need a narrow path of their own.860const processedTOTPInputs = new WeakMap<HTMLInputElement, () => void>();861862function hasLoginOrSignupForm(): boolean {863  const fields = detectLoginFields();864  return isAnyCredentialForm(fields);865}866867function injectTOTPFieldIcon(868  field: HTMLInputElement,869  otpDigitBoxes?: HTMLInputElement[]870): void {871  if (processedTOTPInputs.has(field)) return;872  const cleanup = injectFieldIcon(field, () => {873    currentDismiss?.();874    currentDismiss = null;875    currentAnchorField = null;876    lastDismissedField = null;877    dismissLock = false;878    if (dismissLockTimer) { clearTimeout(dismissLockTimer); dismissLockTimer = null; }879    clearFillStateForExplicitSummon(field);880    field.focus({ preventScroll: true });881    void openTOTPSelector(field, otpDigitBoxes);882  });883  processedTOTPInputs.set(field, cleanup);884}885886// A split-OTP group (4+ OTP-signaling boxes lacking maxlength="1") shows one887// icon on the first box, not one per box. Returns the anchor to inject on888// (group[0]) and its full group, or just the field itself when it's a lone889// TOTP input.890function resolveTOTPIconTarget(891  field: HTMLInputElement892): { anchor: HTMLInputElement; group?: HTMLInputElement[] } {893  const group = findOtpSignalingGroup(field);894  if (group) return { anchor: group[0]!, group };895  return { anchor: field };896}897898export /* @testable */ function scanTOTPFields(): void {899  if (hasLoginOrSignupForm()) return;900  const inputs = document.querySelectorAll<HTMLInputElement>("input");901  for (const input of inputs) {902    if (!isTOTPField(input)) continue;903    const { anchor, group } = resolveTOTPIconTarget(input);904    injectTOTPFieldIcon(anchor, group);905  }906}907908function setupTOTPAutofill(): void {909  setTimeout(scanTOTPFields, 0);910  setTimeout(scanTOTPFields, 500);911  setTimeout(scanTOTPFields, 1500);912913  const debouncedScan = debounce(scanTOTPFields, 200);914  new MutationObserver(debouncedScan).observe(document.body, {915    childList: true,916    subtree: true,917    attributes: true,918    attributeFilter: ["autocomplete", "name", "id", "placeholder", "hidden"],919  });920921  document.addEventListener("focusin", (e) => {922    const target = e.target;923    if (!(target instanceof HTMLInputElement)) return;924    if (hasLoginOrSignupForm()) return;925    if (!isTOTPField(target)) return;926    const { anchor, group } = resolveTOTPIconTarget(target);927    injectTOTPFieldIcon(anchor, group);928  }, true);929}930931document.addEventListener("focusin", onFocusIn);932933setupMutationObserver();934setupTOTPAutofill();935setupSaveDetection();936setupCardAutofill();937938// SPA navigation reset: the content script does not reload across in-app939// route changes (history.pushState, hash navigation, framework routers).940// When the URL changes we clear the page-level fill timestamp so the next941// page works normally; filledForms (a WeakSet) self-empties as old form942// elements leave the DOM. subtree:false because route swaps reliably943// mutate document.body's direct children — subtree:true would fire on944// every internal DOM update and cost us a re-check per mutation.945let lastObservedUrl = globalThis.location.href;946new MutationObserver(() => {947  const currentUrl = globalThis.location?.href;948  if (!currentUrl || currentUrl === lastObservedUrl) return;949  lastObservedUrl = currentUrl;950  pageFilledAt = null;951}).observe(document.body, { childList: true, subtree: false });952953// Async init: check recall map before running the initial scans so we can954// apply the right aggression level for domains the user has needed before.955(async () => {956  let aggressionLevel = 0;957  try {958    const resp = await chrome.runtime.sendMessage({ type: "GET_SETTINGS" });959    const s = (resp as { ok: boolean; data?: { manualSummonDomains?: Record<string, { summonCount: number }> } }).data;960    const domain = getPageDomain();961    const record = domain ? s?.manualSummonDomains?.[domain] : undefined;962    aggressionLevel = !record ? 0 : record.summonCount >= 2 ? 2 : 1;963  } catch { /* SW may be starting up; proceed with normal scan */ }964965  setTimeout(() => initialScan(aggressionLevel, false), 0);966  setTimeout(() => initialScan(aggressionLevel, false), 500);967  setTimeout(() => initialScan(aggressionLevel, true), 1500);968})();969970// ── Card autofill (State 7) ─────────────────────────────────────────971// Card forms get a parallel injection path. The login icon-injection gate972// in reattachListeners deliberately skips non-text fields, so we wire973// cards independently rather than retrofit AUTOFILL_FIELD_TYPES — keeping974// card detection contained makes the boundary easy to follow.975const processedCardInputs = new WeakMap<HTMLInputElement, () => void>();976let currentCardDismiss: (() => void) | null = null;977let currentCardAnchor: HTMLInputElement | null = null;978let lastDismissedCardField: HTMLInputElement | null = null;979980async function fetchSavedCards(capability?: string): Promise<CardSelectorEntry[]> {981  const resp = await chrome.runtime.sendMessage({982    type: "AUTOFILL_QUERY",983    payload: { domain: getPageDomain(), kind: "card", capability },984  }).catch(() => null);985  const r = resp as { ok: boolean; data?: CardSelectorEntry[] } | null;986  return r?.ok ? (r.data ?? []) : [];987}988989async function openCardSelector(anchor: HTMLInputElement, capability?: string): Promise<void> {990  if (!canOpen()) return;991  if (currentCardDismiss && currentCardAnchor === anchor) return;992  if (anchor === lastDismissedCardField) return;993  if (anchor !== lastDismissedCardField) lastDismissedCardField = null;994  if (wasAlreadyFilled(anchor)) return;995996  const cards = await fetchSavedCards(capability);997  if (cards.length === 0) return; // no saved cards → nothing to offer998999  const cardForm = detectCardForm();1000  if (!cardForm?.number) return;10011002  currentCardDismiss?.();1003  currentCardAnchor = anchor;1004  currentCardDismiss = showCardSelector(1005    anchor,1006    cards,1007    {1008      domain: getPageDomain(),1009      capability,1010      onFill: (entry) => {1011        if (!cardForm) return;1012        fillCardForm(cardForm, {1013          cardNumber: entry.cardNumber ?? "",1014          expMonth: entry.expMonth ?? "",1015          expYear: entry.expYear ?? "",1016          cvc: entry.cvc ?? "",1017          cardholderName: entry.cardholderName ?? "",1018        });1019        // All four card field types share the same form — recording the1020        // number field's form is sufficient to suppress reopens on any of1021        // them via wasAlreadyFilled().1022        recordFillSuccess(cardForm.number, cardForm.cvc, cardForm.expiryCombo, cardForm.name);1023        currentCardDismiss = null;1024        currentCardAnchor = null;1025      },1026      onDismiss: () => {1027        lastDismissedCardField = anchor;1028        startDismissLock();1029        currentCardDismiss = null;1030        currentCardAnchor = null;1031      },1032    }1033  );1034}10351036function injectCardIcon(field: HTMLInputElement): void {1037  if (processedCardInputs.has(field)) return;1038  const cleanup = injectFieldIcon(field, () => {1039    currentCardDismiss?.();1040    currentCardDismiss = null;1041    lastDismissedCardField = null;1042    dismissLock = false;1043    if (dismissLockTimer) { clearTimeout(dismissLockTimer); dismissLockTimer = null; }1044    clearFillStateForExplicitSummon(field);1045    field.focus({ preventScroll: true });1046    void openCardSelector(field);1047  });1048  processedCardInputs.set(field, cleanup);1049}10501051function setupCardAutofill(): void {1052  function scan() {1053    const cardForm = detectCardForm();1054    if (!cardForm?.number) return;1055    if (!isVisible(cardForm.number)) return;1056    injectCardIcon(cardForm.number);1057  }10581059  // Initial detection sweep — same retry cadence as login fields so1060  // late-hydrating SPA checkout pages get caught.1061  setTimeout(scan, 0);1062  setTimeout(scan, 500);1063  setTimeout(scan, 1500);10641065  // Re-scan on DOM mutation (separate from the login MutationObserver1066  // because card forms typically appear on a single navigation event,1067  // not field-by-field — coarser observation is sufficient here).1068  let pending = false;1069  new MutationObserver(() => {1070    if (pending) return;1071    pending = true;1072    setTimeout(() => { pending = false; scan(); }, 200);1073  }).observe(document.body, { childList: true, subtree: true });10741075  // Field-focus path: on focus of a cc-number input, ensure icon is1076  // present and consider opening the selector when the user explicitly1077  // clicks into the card number field.1078  document.addEventListener("focusin", (e) => {1079    const target = e.target;1080    if (!(target instanceof HTMLInputElement)) return;1081    const cardForm = detectCardForm();1082    if (cardForm?.number === target) {1083      injectCardIcon(target);1084    }1085  }, true);1086}10871088chrome.runtime.onMessage.addListener((msg, sender, sendResponse) => {1089  // Ignore anything not originating from our own background/service worker.1090  if (sender.id !== chrome.runtime.id) return;1091  if (msg?.type === "GET_SITE_PASSWORD_POLICY") {1092    const policy = detectPasswordPolicy();1093    sendResponse({ ok: true, data: policy });1094    return true;1095  }1096  if (msg?.type === "PING") {1097    sendResponse({ ok: true });1098    return true;1099  }1100  if (msg?.type === "SUMMON_AUTOFILL") {1101    const source = (msg as { type: string; source?: string; capability?: string }).source;1102    const capability = (msg as { capability?: string }).capability;1103    const isShortcut = source === "shortcut";1104    const isPasskeyUnlock = source === "passkey-unlock";11051106    const activeInput = getDeepActiveInput();1107    const fields = detectLoginFields();1108    const hasForm = isAnyCredentialForm(fields);1109    const cardForm = detectCardForm();11101111    if (hasForm) {1112      // Prefer the currently focused field if it's a login field, otherwise1113      // fall back to the first password field, then username/email.1114      const inForm = activeInput && fields.some(f => f.el === activeInput);1115      const target = inForm1116        ? activeInput1117        : (fields.find(f => f.type === "password")?.el1118            ?? fields.find(f => f.type === "username" || f.type === "email")?.el);1119      if (target) {1120        // Explicit user summon (shortcut or extension button) — bypass all1121        // suppression layers. The user is asking for the popup right now.1122        clearFillStateForExplicitSummon(target);1123        dismissLock = false;1124        if (dismissLockTimer) { clearTimeout(dismissLockTimer); dismissLockTimer = null; }1125        lastDismissedField = null;1126        void handleFieldInteraction(target, true, capability);1127      }1128    } else if (isShortcut && cardForm?.number) {1129      clearFillStateForExplicitSummon(cardForm.number);1130      dismissLock = false;1131      if (dismissLockTimer) { clearTimeout(dismissLockTimer); dismissLockTimer = null; }1132      lastDismissedCardField = null;1133      void openCardSelector(cardForm.number, capability);1134    } else if (isPasskeyUnlock) {1135      // Vault is locked during a passkey GET request. Show the inline unlock1136      // prompt anchored to whatever element is focused on the page (typically1137      // the passkey/sign-in button the user just tapped).1138      const anchor = (document.activeElement instanceof HTMLElement && document.activeElement !== document.body)1139        ? document.activeElement as unknown as HTMLInputElement1140        : null;1141      if (anchor) {1142        currentDismiss?.();1143        currentAnchorField = null;1144        passkeySummonActive = true;1145        currentDismiss = showAutofillSelector(anchor, [], () => {}, {1146          domain: getPageDomain(),1147          locked: true,1148          onDismiss: () => { passkeySummonActive = false; },1149        });1150      }1151    } else if (isShortcut) {1152      // Shortcut on a page with no login form — show clipboard-copy search mode.1153      showSearchPalette(capability);1154    }11551156    // Record this domain for the recall system when triggered via shortcut.1157    if (isShortcut) {1158      const domain = getPageDomain();1159      if (domain) {1160        chrome.runtime.sendMessage({ type: "RECORD_MANUAL_SUMMON", payload: { domain } }).catch(() => {});1161      }1162    }11631164    sendResponse({ ok: hasForm || Boolean(cardForm?.number) || isShortcut || isPasskeyUnlock });1165    return true;1166  }1167  if (msg?.type === "PASSKEY_PRO_GATE") {1168    // Background rejected a passkey request for a free user. Show State 111169    // so they know what happened and can choose to upgrade.1170    showPasskeyProGate();1171    sendResponse({ ok: true });1172    return true;1173  }1174  if (msg?.type === "SHOW_PASSKEY_TOAST") {1175    // Block autofill selector for the lifetime of the toast and dismiss anything open.1176    passkeyToastActive = true;1177    passkeyToastToken = typeof (msg.payload as { toastToken?: unknown } | undefined)?.toastToken === "string"1178      ? (msg.payload as { toastToken: string }).toastToken1179      : null;1180    if (currentDismiss) {1181      currentDismiss();1182      currentDismiss = null;1183      currentAnchorField = null;1184    }1185    return false; // inject.tsx owns the toast and calls sendResponse1186  }1187  if (msg?.type === "DISMISS_PASSKEY_TOAST") {1188    passkeyToastActive = false;1189    passkeyToastToken = null;1190    return false; // inject.tsx handles the actual dismissal1191  }1192  if (msg?.type === "VAULT_UNLOCKED") {1193    if (passkeySummonActive) {1194      // This unlock was for a pending passkey GET request. Just dismiss the1195      // inline popup — the passkey approval toast takes over from here.1196      passkeySummonActive = false;1197      if (currentDismiss) {1198        currentDismiss();1199        currentDismiss = null;1200        currentAnchorField = null;1201      }1202      sendResponse({ ok: true });1203      return true;1204    }1205    // Normal autofill path: close the locked-state prompt and re-open with1206    // fresh entry data at the same anchor field.1207    const savedField = currentAnchorField;1208    if (currentDismiss) {1209      currentDismiss();1210      currentDismiss = null;1211      currentAnchorField = null;1212    }1213    void handleFieldInteraction(savedField ?? undefined);1214    sendResponse({ ok: true });1215    return true;1216  }1217  return true;1218});12191220setPasskeyToastClosedListener((toastToken) => {1221  if (toastToken === passkeyToastToken) {1222    passkeyToastActive = false;1223    passkeyToastToken = null;1224  }1225});12261227// Surface State 11 (passkey-available) only when it adds value:1228//   - Cross-browser entry: Chrome passkey on Firefox or vice versa — neither1229//     browser will auto-route, so the banner explains the re-register need.1230//   - Firefox + same-browser entry: Firefox has no equivalent of1231//     webAuthenticationProxy, so without a banner the user has no signal that1232//     Peach is the source.1233// On Chrome with a same-browser entry: skip — webAuthenticationProxy handles1234// the page's own credentials.get transparently and the popup approval view1235// already surfaces it. A banner here would just be noise.1236//1237// Dedupe across navigation: the "already shown" flag lives in trusted1238// background session storage behind MARK_PASSKEY_BANNER_SHOWN — content1239// scripts must not touch chrome.storage.session directly (PB-26-203), since1240// that API has to stay inaccessible to hostile-page-adjacent contexts.1241{1242  function checkPasskeyAvailability() {1243    const domain = location.hostname.replace(/^www\./, "");1244    if (!domain) return;1245    chrome.runtime.sendMessage({1246      type: "GET_PASSKEY_FOR_DOMAIN",1247      payload: { domain },1248    }).then((res: { ok: boolean; data?: { rpId: string; userName: string; browser?: "chrome" | "firefox"; bannerShown?: boolean } | null } | undefined) => {1249      const data = res?.data;1250      if (!data || data.bannerShown) return;1251      const current = detectBrowser();1252      const isCrossBrowser =1253        data.browser && current !== "unknown" && data.browser !== current;1254      const valuableOnFirefox = current === "firefox";1255      if (!isCrossBrowser && !valuableOnFirefox) return;1256      chrome.runtime.sendMessage({1257        type: "MARK_PASSKEY_BANNER_SHOWN",1258        payload: { domain },1259      }).catch(() => {});1260      showPasskeyAvailable({1261        rpId: data.rpId,1262        userName: data.userName,1263        fromBrowser: data.browser,1264        currentBrowser: current,1265      });1266    }).catch(() => {});1267  }12681269  // Defer until DOM is interactive — content_scripts run at document_idle but1270  // some pages still mutate visibly afterwards. A short delay also avoids1271  // surfacing the State 11 toast while the user is in the middle of typing.1272  if (document.readyState === "loading") {1273    document.addEventListener("DOMContentLoaded", () => setTimeout(checkPasskeyAvailability, 800));1274  } else {1275    setTimeout(checkPasskeyAvailability, 800);1276  }1277}