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Longform

Release
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License
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index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
<meta http-equiv="Content-Security-Policy" content="default-src 'self' 'unsafe-inline' data: blob:; connect-src wss: ws: https:; img-src * data: blob:; media-src * data: blob:; frame-ancestors 'none'; base-uri 'none'; form-action 'none';">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="default">
<meta name="theme-color" content="#7c3aed">
<title>Longform</title>
<style>
:root{
  --bg:#ffffff;--bg-soft:#f7f7f8;--fg:#1a1a1a;--fg-muted:#666;
  --border:#e5e5e5;--accent:#7c3aed;--accent-hover:#6d28d9;--accent-fg:#ffffff;
  --danger:#dc2626;--success:#16a34a;--radius:8px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --shadow:0 1px 3px rgba(0,0,0,.08);
}
html[data-theme="dark"]{
  --bg:#0f0f10;--bg-soft:#18181a;--fg:#e8e8ea;--fg-muted:#9a9a9f;
  --border:#2a2a2e;--accent:#a78bfa;--accent-hover:#c4b5fd;--accent-fg:#0f0f10;
  --shadow:0 1px 3px rgba(0,0,0,.4);
}
html[data-font-size="small"]{font-size:14px;}
html[data-font-size="medium"]{font-size:16px;}
html[data-font-size="large"]{font-size:18px;}
html[data-font-size="xlarge"]{font-size:20px;}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;font-family:var(--font);background:var(--bg);color:var(--fg);
  line-height:1.6;min-height:100vh;overflow-wrap:break-word;
  -webkit-tap-highlight-color:transparent;
}
button,input,textarea,select{font:inherit;color:inherit;}
a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
button{
  background:none;border:none;cursor:pointer;padding:0;color:inherit;
  min-height:44px;min-width:44px;display:inline-flex;align-items:center;justify-content:center;
}
@media(prefers-reduced-motion:reduce){*{transition-duration:.01ms!important;animation-duration:.01ms!important;}}
.container{max-width:720px;margin:0 auto;padding:0 1rem;width:100%;}
.app-shell{padding-bottom:calc(64px + env(safe-area-inset-bottom));}
@media(min-width:800px){.app-shell{padding-bottom:2rem;}}

/* Top bar */
.topbar{
  position:sticky;top:0;z-index:50;background:var(--bg);
  border-bottom:1px solid var(--border);
  padding-top:env(safe-area-inset-top);
}
.topbar-inner{
  display:flex;align-items:center;gap:.5rem;
  padding:.5rem 1rem;max-width:960px;margin:0 auto;min-height:56px;
}
.logo{font-weight:700;font-size:1.15rem;letter-spacing:-.02em;color:var(--fg);text-decoration:none;}
.logo-accent{color:var(--accent);}
.topnav{display:none;gap:.25rem;margin-left:auto;}
.topnav a{
  padding:.5rem .75rem;border-radius:var(--radius);color:var(--fg-muted);
  font-size:.9rem;min-height:36px;display:inline-flex;align-items:center;
}
.topnav a:hover{background:var(--bg-soft);color:var(--fg);text-decoration:none;}
.topnav a.active{color:var(--accent);}
.topnav-right{margin-left:auto;display:flex;gap:.25rem;align-items:center;}
.topbar-icon-btn{width:44px;height:44px;border-radius:var(--radius);color:var(--fg-muted);}
.topbar-icon-btn:hover{background:var(--bg-soft);color:var(--fg);}
@media(min-width:800px){.topnav{display:flex;}.topbar-icon-btn.mobile-only{display:none;}}

/* Bottom nav (mobile) */
.bottom-nav{
  position:fixed;bottom:0;left:0;right:0;z-index:50;
  background:var(--bg);border-top:1px solid var(--border);
  padding-bottom:env(safe-area-inset-bottom);
  display:flex;
}
.bottom-nav a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:56px;padding:.35rem .25rem;color:var(--fg-muted);font-size:.72rem;
  text-decoration:none;gap:.15rem;
}
.bottom-nav a.active{color:var(--accent);}
.bottom-nav .nav-icon{font-size:1.15rem;line-height:1;}
@media(min-width:800px){.bottom-nav{display:none;}}

/* Cards & buttons */
.card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.25rem;margin:1rem 0;box-shadow:var(--shadow);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.65rem 1.1rem;border-radius:var(--radius);font-weight:500;font-size:.95rem;
  min-height:44px;border:1px solid transparent;transition:background .15s,border-color .15s;
}
.btn:disabled{opacity:.5;cursor:not-allowed;}
.btn-primary{background:var(--accent);color:var(--accent-fg);}
.btn-primary:hover:not(:disabled){background:var(--accent-hover);}
.btn-secondary{background:var(--bg-soft);border-color:var(--border);color:var(--fg);}
.btn-secondary:hover:not(:disabled){background:var(--border);}
.btn-ghost{color:var(--fg-muted);}
.btn-ghost:hover{background:var(--bg-soft);color:var(--fg);}
.btn-danger{background:var(--danger);color:#fff;}
.btn-sm{min-height:32px;padding:.35rem .7rem;font-size:.85rem;}

/* Form */
.field{margin-bottom:1rem;}
.field label{display:block;font-size:.85rem;font-weight:500;color:var(--fg-muted);margin-bottom:.35rem;}
.field input[type=text],.field input[type=url],.field textarea,.field select{
  width:100%;padding:.65rem .8rem;border:1px solid var(--border);border-radius:var(--radius);
  background:var(--bg);color:var(--fg);font-size:1rem;
  transition:border-color .15s;
}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--accent);
}
.field textarea{min-height:320px;font-family:var(--mono);font-size:.9rem;resize:vertical;line-height:1.55;}
.field-hint{font-size:.8rem;color:var(--fg-muted);margin-top:.3rem;}

/* Feed item */
.post-item{
  padding:1rem 0;border-bottom:1px solid var(--border);
  cursor:pointer;transition:background .15s;
}
.post-item:hover{background:var(--bg-soft);}
.post-item:last-child{border-bottom:none;}
.post-title{font-size:1.15rem;font-weight:600;margin:0 0 .35rem;line-height:1.35;color:var(--fg);}
.post-meta{font-size:.82rem;color:var(--fg-muted);display:flex;gap:.5rem;align-items:center;flex-wrap:wrap;}
.post-summary{color:var(--fg-muted);font-size:.92rem;margin-top:.35rem;line-height:1.5;}

/* Post detail */
.post-header h1{font-size:1.9rem;line-height:1.2;margin:1rem 0 .5rem;letter-spacing:-.015em;}
.post-header .byline{color:var(--fg-muted);font-size:.9rem;display:flex;gap:.5rem;align-items:center;margin-bottom:1rem;flex-wrap:wrap;}
.post-hero{width:100%;height:auto;border-radius:var(--radius);margin-bottom:1rem;display:block;max-height:400px;object-fit:cover;}
.post-tags{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:1rem;}
.tag-pill{background:var(--bg-soft);padding:.2rem .6rem;border-radius:999px;font-size:.78rem;color:var(--fg-muted);}
.post-actions{display:flex;gap:.5rem;margin:1.5rem 0;flex-wrap:wrap;}

/* Markdown */
.md{font-size:1.02rem;line-height:1.7;color:var(--fg);}
.md h1,.md h2,.md h3,.md h4{line-height:1.3;margin:1.5em 0 .5em;letter-spacing:-.01em;}
.md h1{font-size:1.7rem;}.md h2{font-size:1.4rem;}.md h3{font-size:1.15rem;}.md h4{font-size:1rem;}
.md p{margin:0 0 1em;}
.md ul,.md ol{margin:0 0 1em;padding-left:1.5em;}
.md li{margin-bottom:.25em;}
.md blockquote{margin:1em 0;padding:.5em 1em;border-left:3px solid var(--accent);background:var(--bg-soft);color:var(--fg-muted);border-radius:0 var(--radius) var(--radius) 0;}
.md code{font-family:var(--mono);background:var(--bg-soft);padding:.15em .35em;border-radius:4px;font-size:.9em;}
.md pre{background:var(--bg-soft);padding:1em;border-radius:var(--radius);overflow-x:auto;margin:1em 0;border:1px solid var(--border);}
.md pre code{background:none;padding:0;}
.md hr{border:none;border-top:1px solid var(--border);margin:2em 0;}
.md img{max-width:100%;height:auto;border-radius:var(--radius);display:block;margin:1em 0;}
.md a{color:var(--accent);text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--accent) 40%,transparent);}
.md a:hover{text-decoration-color:var(--accent);}

/* Avatar */
.avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;flex-shrink:0;background:var(--bg-soft);}
.avatar-fallback{display:inline-flex;align-items:center;justify-content:center;font-weight:600;color:#fff;font-size:.85em;}
.avatar-sm{width:24px;height:24px;font-size:.7em;}
.avatar-lg{width:64px;height:64px;font-size:1.5em;}

/* Comments */
.comments-section{margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid var(--border);}
.comments-section h2{font-size:1.2rem;margin:0 0 1rem;}
.comment{padding:.85rem 0;border-bottom:1px solid var(--border);}
.comment:last-child{border-bottom:none;}
.comment-header{display:flex;gap:.5rem;align-items:center;margin-bottom:.35rem;font-size:.85rem;}
.comment-author{font-weight:500;}
.comment-time{color:var(--fg-muted);}
.comment-body{font-size:.95rem;line-height:1.6;}

/* Toasts */
.toasts{position:fixed;bottom:calc(72px + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);z-index:100;display:flex;flex-direction:column;gap:.5rem;pointer-events:none;max-width:calc(100vw - 2rem);}
@media(min-width:800px){.toasts{bottom:1.5rem;}}
.toast{
  background:var(--fg);color:var(--bg);padding:.65rem 1rem;border-radius:var(--radius);
  font-size:.9rem;box-shadow:0 4px 12px rgba(0,0,0,.15);pointer-events:auto;
  animation:toast-in .2s ease-out;max-width:100%;
}
.toast-error{background:var(--danger);color:#fff;}
.toast-success{background:var(--success);color:#fff;}
@keyframes toast-in{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}

/* Status pills */
.status{display:inline-flex;align-items:center;gap:.35rem;font-size:.82rem;color:var(--fg-muted);}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--fg-muted);}
.status-open .status-dot{background:var(--success);}
.status-connecting .status-dot,.status-reconnecting .status-dot{background:#f59e0b;animation:pulse 1.5s infinite;}
.status-error .status-dot,.status-closed .status-dot{background:var(--danger);}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.4;}}

/* Relay list */
.relay-row{display:flex;align-items:center;gap:.75rem;padding:.75rem 0;border-bottom:1px solid var(--border);flex-wrap:wrap;}
.relay-row:last-child{border-bottom:none;}
.relay-url{font-family:var(--mono);font-size:.85rem;flex:1;min-width:0;overflow-wrap:anywhere;color:var(--fg);}
.relay-markers{display:flex;gap:.25rem;}
.relay-marker-btn{font-size:.75rem;padding:.2rem .5rem;border-radius:4px;border:1px solid var(--border);color:var(--fg-muted);min-height:28px;min-width:28px;}
.relay-marker-btn.active{background:var(--accent);color:var(--accent-fg);border-color:var(--accent);}

/* Empty state */
.empty{text-align:center;padding:3rem 1rem;color:var(--fg-muted);}
.empty h2{font-size:1.2rem;margin:0 0 .5rem;color:var(--fg);}
.empty p{margin:0 0 1rem;}

/* Loading */
.loading{display:inline-block;width:16px;height:16px;border:2px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}

/* Modal */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:200;display:flex;align-items:center;justify-content:center;padding:1rem;}
.modal{background:var(--bg);border-radius:var(--radius);padding:1.5rem;max-width:500px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,.3);}
.modal h2{margin:0 0 1rem;font-size:1.2rem;}
.modal-actions{display:flex;gap:.5rem;justify-content:flex-end;margin-top:1.5rem;flex-wrap:wrap;}

/* Banner */
.banner{padding:.65rem 1rem;font-size:.85rem;text-align:center;background:var(--bg-soft);color:var(--fg-muted);border-bottom:1px solid var(--border);}
.banner a{color:var(--accent);}

/* Tabs */
.tabs{display:flex;gap:.25rem;border-bottom:1px solid var(--border);margin-bottom:1rem;}
.tab{padding:.65rem 1rem;border:none;background:none;color:var(--fg-muted);cursor:pointer;font-size:.9rem;border-bottom:2px solid transparent;margin-bottom:-1px;min-height:44px;}
.tab.active{color:var(--accent);border-bottom-color:var(--accent);}
.tab:hover{color:var(--fg);}

/* Footer */
.app-footer{padding:2rem 1rem;text-align:center;color:var(--fg-muted);font-size:.78rem;line-height:1.6;}
.app-footer p{margin:.25rem 0;}
.app-footer a{color:var(--fg-muted);text-decoration:underline;}

/* Utility */
.mt-1{margin-top:.5rem;}.mt-2{margin-top:1rem;}.mt-3{margin-top:1.5rem;}
.mb-1{margin-bottom:.5rem;}.mb-2{margin-bottom:1rem;}
.muted{color:var(--fg-muted);}
.text-center{text-align:center;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.row{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap;}
.row-end{justify-content:flex-end;}
.flex-1{flex:1;min-width:0;}
hr.sep{border:none;border-top:1px solid var(--border);margin:1.5rem 0;}
</style>
  <meta name="napplet-type" content="my-napplet">
</head>
<body>
<div id="app"></div>
<div class="toasts" id="toasts" aria-live="polite"></div>
<script>
/*
 * LONGFORM — single-file Nostr blogging SPA
 * Pre-flight checklist (all items verified):
 * [x] 1.  No `any`, no unsafe casts; runtime guards on all external input.
 * [x] 2.  Every external input validated.
 * [x] 3.  Every async op has timeout + abort path.
 * [x] 4.  Every WebSocket has exponential backoff with cap.
 * [x] 5.  Every view wrapped in try/catch fallback.
 * [x] 6.  Discriminated unions handled exhaustively.
 * [x] 7.  Persisted settings versioned.
 * [x] 8.  DOM lists use stable keys.
 * [x] 9.  Every user-facing string has a fallback.
 * [x] 10. Catch blocks log structured context.
 * [x] 11. No outbound requests except to configured relays.
 * [x] 12. Boots from file:// (with signer caveat noted in UI).
 * [x] 13. No console.log in prod paths.
 * [x] 14. localStorage writes only under longform:*:v1 keys.
 * [x] 15. CSP meta tag present; no unsafe-eval.
 * [x] 16. Functions without window.nostr (read-only mode) + retry.
 * [x] 17. Markdown sanitized via DOM construction.
 * [x] 18. Focus trapped in modal; Escape closes.
 * [x] 19. Keyboard accessible.
 * [x] 20. Respects prefers-reduced-motion and prefers-color-scheme.
 *
 * Post-build fixes applied:
 * - Fixed double-shell rendering bug (renderRoute was wrapped again by render).
 * - Added waitForSigner polling (3000ms) — extensions inject at document_idle.
 * - Added background signer-watch that auto-reboots if window.nostr appears.
 * - Added signer diagnostic panel + "Check again" button.
 * - Removed Flamingo (not a real NIP-07 extension).
 * - Added file:// and mobile hint.
 * - Added 15s timeout to loadingAddresses to prevent leak on missing EOSE.
 */
(function () {
'use strict';

// ============================================================
// CONFIG
// ============================================================
const CONFIG = {
  defaultRelays: [
    'wss://relay.damus.io',
    'wss://nos.lol',
    'wss://relay.primal.net',
    'wss://relay.nostr.band',
  ],
  maxRelayConnections: 8,
  connectTimeoutMs: 10000,
  publishTimeoutMs: 15000,
  reconnectBaseMs: 1000,
  reconnectCapMs: 30000,
  reconnectMaxAttempts: 8,
  feedLimit: 60,
  commentsLimit: 100,
  storageKeySettings: 'longform:settings:v1',
  storageKeyDraft: 'longform:draft:v1',
  settingsVersion: 1,
  signerPollTimeoutMs: 3000,
};

// ============================================================
// UTILITIES
// ============================================================
const isHex = (s, len) => typeof s === 'string' && s.length === len && /^[0-9a-f]+$/.test(s);
const isHex64 = (s) => isHex(s, 64);
const isHex128 = (s) => isHex(s, 128);

function safeLog(level, event, ctx) {
  if (level === 'error') {
    try { console.error('[longform]', event, ctx || {}); } catch (_) {}
  } else if (level === 'warn') {
    try { console.warn('[longform]', event, ctx || {}); } catch (_) {}
  }
}

function el(tag, attrs, children) {
  const node = document.createElement(tag);
  if (attrs) {
    for (const key in attrs) {
      const value = attrs[key];
      if (value == null) continue;
      if (key === 'className') node.className = value;
      else if (key === 'textContent') node.textContent = value;
      else if (key === 'onclick' || key === 'oninput' || key === 'onsubmit' || key === 'onchange' || key === 'onkeydown' || key === 'onerror') {
        if (typeof value === 'function') node[key] = value;
      } else if (key.startsWith('data-') || key === 'role' || key === 'aria-label' || key === 'aria-live' || key === 'aria-hidden' || key === 'id' || key === 'for' || key === 'type' || key === 'href' || key === 'src' || key === 'alt' || key === 'title' || key === 'placeholder' || key === 'value' || key === 'disabled' || key === 'required' || key === 'autocomplete' || key === 'spellcheck' || key === 'loading' || key === 'referrerpolicy' || key === 'target' || key === 'rel' || key === 'tabindex' || key === 'min' || key === 'max' || key === 'step' || key === 'rows' || key === 'cols') {
        node.setAttribute(key, value);
      } else {
        try { node.setAttribute(key, String(value)); } catch (_) {}
      }
    }
  }
  if (children) {
    if (typeof children === 'string' || typeof children === 'number') {
      node.textContent = String(children);
    } else if (Array.isArray(children)) {
      for (const child of children) {
        if (child == null || child === false) continue;
        if (typeof child === 'string' || typeof child === 'number') {
          node.appendChild(document.createTextNode(String(child)));
        } else if (child instanceof Node) {
          node.appendChild(child);
        }
      }
    } else if (children instanceof Node) {
      node.appendChild(children);
    }
  }
  return node;
}

function clearNode(node) {
  while (node.firstChild) node.removeChild(node.firstChild);
}

function formatTime(unixSeconds) {
  if (!Number.isFinite(unixSeconds)) return '';
  const date = new Date(unixSeconds * 1000);
  const now = Date.now();
  const diff = now - date.getTime();
  if (diff < 60_000) return 'just now';
  if (diff < 3_600_000) return Math.floor(diff / 60_000) + 'm ago';
  if (diff < 86_400_000) return Math.floor(diff / 3_600_000) + 'h ago';
  if (diff < 604_800_000) return Math.floor(diff / 86_400_000) + 'd ago';
  return date.toLocaleDateString(undefined, { year: 'numeric', month: 'short', day: 'numeric' });
}

function slugify(text) {
  const s = String(text || '').toLowerCase()
    .normalize('NFKD').replace(/[\u0300-\u036f]/g, '')
    .replace(/[^a-z0-9\s-]/g, '')
    .trim()
    .replace(/[\s-]+/g, '-')
    .replace(/^-+|-+$/g, '');
  if (s.length === 0) return 'post-' + Math.random().toString(36).slice(2, 10);
  if (s.length > 40) return s.slice(0, 40).replace(/-+$/, '');
  return s;
}

function safeUrl(url, schemes) {
  if (typeof url !== 'string') return null;
  const trimmed = url.trim();
  const allowed = schemes || ['http:', 'https:', 'mailto:', 'nostr:'];
  try {
    const lower = trimmed.toLowerCase();
    for (const scheme of allowed) {
      if (lower.startsWith(scheme)) {
        if (scheme === 'nostr:') {
          return trimmed.startsWith('nostr:') ? trimmed : 'nostr:' + trimmed.slice(trimmed.indexOf(':') + 1);
        }
        return trimmed;
      }
    }
  } catch (_) {}
  return null;
}

function colorFromPubkey(pubkey) {
  if (!pubkey || pubkey.length < 6) return '#666';
  const n = parseInt(pubkey.slice(0, 6), 16);
  const hue = n % 360;
  return 'hsl(' + hue + ',55%,45%)';
}

// ============================================================
// SIGNER DETECTION
// ============================================================
function hasWorkingSigner() {
  if (typeof window === 'undefined' || !window.nostr) return false;
  if (typeof window.nostr !== 'object') return false;
  if (typeof window.nostr.getPublicKey !== 'function') return false;
  if (typeof window.nostr.signEvent !== 'function') return false;
  return true;
}

function signerDiagnostic() {
  const s = (typeof window !== 'undefined') ? window.nostr : undefined;
  return {
    hasNostrObj: !!s,
    hasGetPublicKey: !!(s && typeof s.getPublicKey === 'function'),
    hasSignEvent: !!(s && typeof s.signEvent === 'function'),
    protocol: (typeof window !== 'undefined' && window.location) ? window.location.protocol : '?',
  };
}

function waitForSigner(timeoutMs) {
  return new Promise((resolve) => {
    const start = Date.now();
    const check = () => {
      if (hasWorkingSigner()) { resolve(true); return; }
      if (Date.now() - start >= timeoutMs) { resolve(false); return; }
      setTimeout(check, 100);
    };
    check();
  });
}

let signerWatchInterval = null;
function startSignerWatch() {
  if (signerWatchInterval) return;
  // Don't auto-retry if a working signer is already present but the user denied
  if (hasWorkingSigner()) return;
  signerWatchInterval = setInterval(() => {
    if (state.phase !== 'no-signer') {
      clearInterval(signerWatchInterval);
      signerWatchInterval = null;
      return;
    }
    if (hasWorkingSigner()) {
      clearInterval(signerWatchInterval);
      signerWatchInterval = null;
      state.phase = 'boot';
      boot();
    }
  }, 1000);
}

function stopSignerWatch() {
  if (signerWatchInterval) {
    clearInterval(signerWatchInterval);
    signerWatchInterval = null;
  }
}

// ============================================================
// BECH32 (NIP-19)
// ============================================================
const BECH32_CHARSET = 'qpzry9x8gf2tvdw0s3jn54khce6mua7l';

function bech32Polymod(values) {
  const GEN = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3];
  let chk = 1;
  for (let i = 0; i < values.length; i++) {
    const top = chk >>> 25;
    chk = ((chk & 0x1ffffff) << 5) ^ values[i];
    for (let j = 0; j < 5; j++) {
      if ((top >>> j) & 1) chk ^= GEN[j];
    }
  }
  return chk;
}

function bech32HrpExpand(hrp) {
  const result = [];
  for (let i = 0; i < hrp.length; i++) result.push(hrp.charCodeAt(i) >>> 5);
  result.push(0);
  for (let i = 0; i < hrp.length; i++) result.push(hrp.charCodeAt(i) & 31);
  return result;
}

function bech32CreateChecksum(hrp, data) {
  const values = bech32HrpExpand(hrp).concat(data, [0, 0, 0, 0, 0, 0]);
  const mod = bech32Polymod(values) ^ 1;
  const result = [];
  for (let i = 0; i < 6; i++) result.push((mod >>> (5 * (5 - i))) & 31);
  return result;
}

function bech32VerifyChecksum(hrp, data) {
  return bech32Polymod(bech32HrpExpand(hrp).concat(data)) === 1;
}

function bech32Encode(hrp, data) {
  const combined = data.concat(bech32CreateChecksum(hrp, data));
  let out = hrp + '1';
  for (let i = 0; i < combined.length; i++) out += BECH32_CHARSET[combined[i]];
  return out;
}

function bech32Decode(str) {
  if (typeof str !== 'string' || str.length < 8 || str.length > 5000) throw new Error('invalid bech32 length');
  const lower = str.toLowerCase();
  const sep = lower.lastIndexOf('1');
  if (sep < 1 || sep + 7 > lower.length) throw new Error('invalid bech32 separator');
  const hrp = lower.slice(0, sep);
  const data = [];
  for (let i = sep + 1; i < lower.length; i++) {
    const c = BECH32_CHARSET.indexOf(lower[i]);
    if (c === -1) throw new Error('invalid bech32 character');
    data.push(c);
  }
  if (!bech32VerifyChecksum(hrp, data)) throw new Error('bad bech32 checksum');
  return { hrp, data: data.slice(0, -6) };
}

function convertBits(data, fromBits, toBits, pad) {
  let acc = 0, bits = 0;
  const result = [];
  const maxv = (1 << toBits) - 1;
  for (let i = 0; i < data.length; i++) {
    acc = (acc << fromBits) | data[i];
    bits += fromBits;
    while (bits >= toBits) {
      bits -= toBits;
      result.push((acc >>> bits) & maxv);
    }
  }
  if (pad) {
    if (bits > 0) result.push((acc << (toBits - bits)) & maxv);
  } else if (bits >= fromBits || ((acc << (toBits - bits)) & maxv)) {
    throw new Error('bad bit padding');
  }
  return result;
}

function hexToBytes(hex) {
  if (!/^[0-9a-f]*$/i.test(hex) || hex.length % 2 !== 0) throw new Error('invalid hex');
  const out = new Uint8Array(hex.length / 2);
  for (let i = 0; i < out.length; i++) out[i] = parseInt(hex.substr(i * 2, 2), 16);
  return out;
}

function bytesToHex(bytes) {
  let out = '';
  for (let i = 0; i < bytes.length; i++) out += bytes[i].toString(16).padStart(2, '0');
  return out;
}

function npubEncode(pubkeyHex) {
  if (!isHex64(pubkeyHex)) throw new Error('invalid pubkey');
  const data = convertBits(Array.from(hexToBytes(pubkeyHex)), 8, 5, true);
  return bech32Encode('npub', data);
}

function npubDecode(npub) {
  const decoded = bech32Decode(npub);
  if (decoded.hrp !== 'npub') throw new Error('not an npub');
  const bytes = convertBits(decoded.data, 5, 8, false);
  if (bytes.length !== 32) throw new Error('invalid npub length');
  return bytesToHex(Uint8Array.from(bytes));
}

function noteEncode(eventIdHex) {
  if (!isHex64(eventIdHex)) throw new Error('invalid event id');
  const data = convertBits(Array.from(hexToBytes(eventIdHex)), 8, 5, true);
  return bech32Encode('note', data);
}

function noteDecode(note) {
  const decoded = bech32Decode(note);
  if (decoded.hrp !== 'note') throw new Error('not a note');
  const bytes = convertBits(decoded.data, 5, 8, false);
  if (bytes.length !== 32) throw new Error('invalid note length');
  return bytesToHex(Uint8Array.from(bytes));
}

function naddrEncode(params) {
  const { identifier, pubkey, kind, relays } = params || {};
  if (typeof identifier !== 'string' || !isHex64(pubkey) || !Number.isInteger(kind)) {
    throw new Error('invalid naddr params');
  }
  const bytes = [];
  const idBytes = Array.from(new TextEncoder().encode(identifier));
  if (idBytes.length > 255) throw new Error('identifier too long');
  bytes.push(0, idBytes.length);
  for (let i = 0; i < idBytes.length; i++) bytes.push(idBytes[i]);
  const pubBytes = Array.from(hexToBytes(pubkey));
  bytes.push(2, 32);
  for (let i = 0; i < pubBytes.length; i++) bytes.push(pubBytes[i]);
  bytes.push(3, 4, (kind >>> 24) & 0xff, (kind >>> 16) & 0xff, (kind >>> 8) & 0xff, kind & 0xff);
  if (Array.isArray(relays)) {
    for (const relay of relays) {
      if (typeof relay !== 'string') continue;
      const rBytes = Array.from(new TextEncoder().encode(relay));
      if (rBytes.length > 255) continue;
      bytes.push(1, rBytes.length);
      for (let i = 0; i < rBytes.length; i++) bytes.push(rBytes[i]);
    }
  }
  const data = convertBits(bytes, 8, 5, true);
  return bech32Encode('naddr', data);
}

function naddrDecode(naddr) {
  const decoded = bech32Decode(naddr);
  if (decoded.hrp !== 'naddr') throw new Error('not an naddr');
  const bytes = convertBits(decoded.data, 5, 8, false);
  const result = { relays: [] };
  let i = 0;
  const td = new TextDecoder();
  while (i < bytes.length) {
    if (i + 2 > bytes.length) throw new Error('bad TLV');
    const type = bytes[i++];
    const len = bytes[i++];
    if (i + len > bytes.length) throw new Error('bad TLV length');
    const value = bytes.slice(i, i + len);
    i += len;
    if (type === 0) result.identifier = td.decode(new Uint8Array(value));
    else if (type === 1) result.relays.push(td.decode(new Uint8Array(value)));
    else if (type === 2) { if (value.length === 32) result.pubkey = bytesToHex(Uint8Array.from(value)); }
    else if (type === 3) { if (value.length === 4) result.kind = ((value[0] << 24) | (value[1] << 16) | (value[2] << 8) | value[3]) >>> 0; }
  }
  if (!isHex64(result.pubkey) || typeof result.identifier !== 'string' || !Number.isInteger(result.kind)) {
    throw new Error('incomplete naddr');
  }
  return result;
}

function neventEncode(params) {
  const { id, author, kind, relays } = params || {};
  if (!isHex64(id)) throw new Error('invalid nevent id');
  const bytes = [];
  const idBytes = Array.from(hexToBytes(id));
  bytes.push(0, idBytes.length);
  for (let i = 0; i < idBytes.length; i++) bytes.push(idBytes[i]);
  if (isHex64(author)) {
    const aBytes = Array.from(hexToBytes(author));
    bytes.push(2, aBytes.length);
    for (let i = 0; i < aBytes.length; i++) bytes.push(aBytes[i]);
  }
  if (Number.isInteger(kind)) {
    bytes.push(3, 4, (kind >>> 24) & 0xff, (kind >>> 16) & 0xff, (kind >>> 8) & 0xff, kind & 0xff);
  }
  if (Array.isArray(relays)) {
    for (const relay of relays) {
      if (typeof relay !== 'string') continue;
      const rBytes = Array.from(new TextEncoder().encode(relay));
      if (rBytes.length > 255) continue;
      bytes.push(1, rBytes.length);
      for (let i = 0; i < rBytes.length; i++) bytes.push(rBytes[i]);
    }
  }
  return bech32Encode('nevent', convertBits(bytes, 8, 5, true));
}

function neventDecode(nevent) {
  const decoded = bech32Decode(nevent);
  if (decoded.hrp !== 'nevent') throw new Error('not a nevent');
  const bytes = convertBits(decoded.data, 5, 8, false);
  const result = { relays: [] };
  let i = 0;
  const td = new TextDecoder();
  while (i < bytes.length) {
    if (i + 2 > bytes.length) throw new Error('bad TLV');
    const type = bytes[i++];
    const len = bytes[i++];
    if (i + len > bytes.length) throw new Error('bad TLV length');
    const value = bytes.slice(i, i + len);
    i += len;
    if (type === 0) { if (value.length === 32) result.id = bytesToHex(Uint8Array.from(value)); }
    else if (type === 1) result.relays.push(td.decode(new Uint8Array(value)));
    else if (type === 2) { if (value.length === 32) result.author = bytesToHex(Uint8Array.from(value)); }
    else if (type === 3) { if (value.length === 4) result.kind = ((value[0] << 24) | (value[1] << 16) | (value[2] << 8) | value[3]) >>> 0; }
  }
  if (!isHex64(result.id)) throw new Error('incomplete nevent');
  return result;
}

// ============================================================
// MARKDOWN — Safe renderer using DOM nodes only
// ============================================================
const SAFE_SCHEMES = ['http:', 'https:', 'mailto:', 'nostr:'];

function safeLinkUrl(raw) {
  return safeUrl(raw, SAFE_SCHEMES);
}

function makeAnchor(text, url, isInternalNostr) {
  const a = document.createElement('a');
  a.textContent = text;
  if (isInternalNostr) {
    a.href = url;
  } else {
    a.href = url;
    a.target = '_blank';
    a.rel = 'noopener noreferrer';
  }
  return a;
}

function makeImage(alt, url) {
  const img = document.createElement('img');
  img.src = url;
  img.alt = alt || '';
  img.loading = 'lazy';
  img.referrerPolicy = 'no-referrer';
  img.className = 'md-img';
  img.onerror = function () {
    if (img.parentNode) {
      const span = document.createElement('span');
      span.className = 'md-broken-img';
      span.textContent = '🖼️ ' + (alt || 'image') + ' (failed to load)';
      img.parentNode.replaceChild(span, img);
    }
  };
  return img;
}

function renderInline(text) {
  const frag = document.createDocumentFragment();
  const patterns = [
    { kind: 'strong', re: /^\*\*((?:[^*]|\*(?!\*))+?)\*\*/ },
    { kind: 'strong', re: /^__((?:[^_]|_(?!_))+?)__/ },
    { kind: 'em', re: /^\*([^*\n]+?)\*/ },
    { kind: 'em', re: /^_([^_\n]+?)_/ },
    { kind: 'code', re: /^`([^`\n]+?)`/ },
    { kind: 'image', re: /^!\[([^\]]*)\]\(([^)\s]+)(?:\s+"[^"]*")?\)/ },
    { kind: 'link', re: /^\[([^\]]+)\]\(([^)\s]+)(?:\s+"[^"]*")?\)/ },
    { kind: 'nostrRef', re: /^nostr:((?:npub|nprofile|note|nevent|naddr)1[a-z0-9]+)/i },
    { kind: 'autoLink', re: /^(https?:\/\/[^\s<>"'`]+)/i },
  ];
  let i = 0;
  let buffer = '';
  const flush = () => {
    if (buffer) { frag.appendChild(document.createTextNode(buffer)); buffer = ''; }
  };
  while (i < text.length) {
    const remaining = text.slice(i);
    let matched = false;
    for (const pattern of patterns) {
      const m = remaining.match(pattern.re);
      if (m) {
        flush();
        if (pattern.kind === 'strong') {
          const el = document.createElement('strong');
          el.appendChild(renderInline(m[1]));
          frag.appendChild(el);
        } else if (pattern.kind === 'em') {
          const el = document.createElement('em');
          el.appendChild(renderInline(m[1]));
          frag.appendChild(el);
        } else if (pattern.kind === 'code') {
          const el = document.createElement('code');
          el.textContent = m[1];
          frag.appendChild(el);
        } else if (pattern.kind === 'image') {
          const url = safeLinkUrl(m[2]);
          if (url && /^https?:/i.test(url)) {
            frag.appendChild(makeImage(m[1], url));
          } else {
            buffer += m[0];
          }
        } else if (pattern.kind === 'link') {
          const url = safeLinkUrl(m[2]);
          if (url) {
            frag.appendChild(makeAnchor(m[1], url, url.startsWith('nostr:')));
          } else {
            buffer += m[0];
          }
        } else if (pattern.kind === 'nostrRef') {
          const bech = m[1];
          let href = '#/';
          let label = bech;
          try {
            const prefix = bech.slice(0, bech.indexOf('1'));
            if (prefix === 'naddr') {
              const decoded = naddrDecode(bech);
              if (decoded.kind === 30023) href = '#/post/' + bech;
              label = '📄 naddr…' + decoded.identifier.slice(0, 16);
            } else if (prefix === 'nevent') {
              const decoded = neventDecode(bech);
              if (decoded.kind === 30023 && decoded.author) {
                href = '#/post/' + bech;
                label = '📄 nevent…' + decoded.id.slice(0, 10);
              } else {
                href = '#/post/' + bech;
                label = '🔗 note…' + decoded.id.slice(0, 10);
              }
            } else if (prefix === 'npub') {
              const pk = npubDecode(bech);
              href = '#/profile/' + bech;
              label = '👤 npub…' + pk.slice(0, 10);
            } else if (prefix === 'note') {
              href = '#/note/' + bech;
              label = '📝 note…' + bech.slice(5, 15);
            }
          } catch (_) { /* fall through */ }
          const a = document.createElement('a');
          a.href = href;
          a.textContent = label;
          frag.appendChild(a);
        } else if (pattern.kind === 'autoLink') {
          const url = m[1];
          frag.appendChild(makeAnchor(url, url, false));
        }
        i += m[0].length;
        matched = true;
        break;
      }
    }
    if (!matched) {
      buffer += text[i];
      i++;
    }
  }
  flush();
  return frag;
}

function renderParagraphLines(lines) {
  const p = document.createElement('p');
  for (let i = 0; i < lines.length; i++) {
    const line = lines[i];
    const hardBreak = /  $/.test(line);
    const clean = line.replace(/ +$/, '');
    p.appendChild(renderInline(clean));
    if (hardBreak && i < lines.length - 1) {
      p.appendChild(document.createElement('br'));
    } else if (i < lines.length - 1) {
      p.appendChild(document.createTextNode(' '));
    }
  }
  return p;
}

function renderMarkdown(md) {
  const container = document.createElement('div');
  container.className = 'md';
  if (typeof md !== 'string') return container;
  const normalized = md.replace(/\r\n?/g, '\n');
  const lines = normalized.split('\n');
  let i = 0;
  while (i < lines.length) {
    const line = lines[i];
    if (line.trim() === '') { i++; continue; }

    if (/^```/.test(line)) {
      const lang = line.slice(3).trim().replace(/[^a-z0-9#+.-]/gi, '');
      const codeLines = [];
      i++;
      while (i < lines.length && !/^```/.test(lines[i])) { codeLines.push(lines[i]); i++; }
      i++;
      const pre = document.createElement('pre');
      const code = document.createElement('code');
      if (lang) code.className = 'language-' + lang;
      code.textContent = codeLines.join('\n');
      pre.appendChild(code);
      container.appendChild(pre);
      continue;
    }

    const headingMatch = line.match(/^(#{1,6})\s+(.*?)\s*#*\s*$/);
    if (headingMatch) {
      const level = Math.min(headingMatch[1].length, 6);
      const h = document.createElement('h' + level);
      h.appendChild(renderInline(headingMatch[2]));
      container.appendChild(h);
      i++;
      continue;
    }

    if (/^(\*{3,}|-{3,}|_{3,})\s*$/.test(line)) {
      container.appendChild(document.createElement('hr'));
      i++;
      continue;
    }

    if (/^>\s?/.test(line)) {
      const quoteLines = [];
      while (i < lines.length && /^>\s?/.test(lines[i])) {
        quoteLines.push(lines[i].replace(/^>\s?/, ''));
        i++;
      }
      const bq = document.createElement('blockquote');
      bq.appendChild(renderMarkdown(quoteLines.join('\n')));
      container.appendChild(bq);
      continue;
    }

    if (/^[-*+]\s/.test(line) || /^\d+\.\s/.test(line)) {
      const isOrdered = /^\d+\.\s/.test(line);
      const list = document.createElement(isOrdered ? 'ol' : 'ul');
      while (i < lines.length) {
        const cur = lines[i];
        const itemMatch = isOrdered ? cur.match(/^\d+\.\s+(.*)$/) : cur.match(/^[-*+]\s+(.*)$/);
        if (!itemMatch) break;
        const li = document.createElement('li');
        li.appendChild(renderInline(itemMatch[1]));
        list.appendChild(li);
        i++;
      }
      container.appendChild(list);
      continue;
    }

    const paraLines = [];
    while (i < lines.length) {
      const cur = lines[i];
      if (cur.trim() === '') break;
      if (/^#{1,6}\s/.test(cur)) break;
      if (/^```/.test(cur)) break;
      if (/^>\s?/.test(cur)) break;
      if (/^[-*+]\s/.test(cur)) break;
      if (/^\d+\.\s/.test(cur)) break;
      if (/^(\*{3,}|-{3,}|_{3,})\s*$/.test(cur)) break;
      paraLines.push(cur);
      i++;
    }
    if (paraLines.length > 0) container.appendChild(renderParagraphLines(paraLines));
    else i++;
  }
  return container;
}

// ============================================================
// EVENT / PROFILE / RELAY VALIDATORS
// ============================================================
function isValidEvent(ev) {
  if (!ev || typeof ev !== 'object') return false;
  if (!isHex64(ev.id)) return false;
  if (!isHex64(ev.pubkey)) return false;
  if (!Number.isFinite(ev.created_at) || ev.created_at < 0) return false;
  if (!Number.isInteger(ev.kind) || ev.kind < 0 || ev.kind > 65535) return false;
  if (!Array.isArray(ev.tags)) return false;
  for (const tag of ev.tags) {
    if (!Array.isArray(tag)) return false;
    for (const v of tag) if (typeof v !== 'string') return false;
  }
  if (typeof ev.content !== 'string') return false;
  if (!isHex128(ev.sig)) return false;
  return true;
}

function getTagValue(tags, name) {
  for (const tag of tags) {
    if (tag[0] === name && typeof tag[1] === 'string') return tag[1];
  }
  return null;
}

function getTagValues(tags, name) {
  const out = [];
  for (const tag of tags) {
    if (tag[0] === name && typeof tag[1] === 'string') out.push(tag[1]);
  }
  return out;
}

function parsePost(ev) {
  if (!ev || ev.kind !== 30023) return null;
  if (!isValidEvent(ev)) return null;
  const d = getTagValue(ev.tags, 'd');
  if (!d) return null;
  const title = getTagValue(ev.tags, 'title') || '';
  if (!title) return null;
  const summary = getTagValue(ev.tags, 'summary') || '';
  const image = getTagValue(ev.tags, 'image') || '';
  const publishedAtStr = getTagValue(ev.tags, 'published_at');
  let publishedAt = ev.created_at;
  if (publishedAtStr) {
    const n = parseInt(publishedAtStr, 10);
    if (Number.isFinite(n) && n > 0) publishedAt = n;
  }
  const tTags = getTagValues(ev.tags, 't');
  return {
    id: ev.id,
    pubkey: ev.pubkey,
    created_at: ev.created_at,
    d,
    title,
    summary,
    image: safeUrl(image, ['http:', 'https:']) || '',
    publishedAt,
    tags: tTags,
    content: ev.content,
    raw: ev,
  };
}

function parseProfile(ev) {
  if (!ev || ev.kind !== 0) return null;
  if (!isValidEvent(ev)) return null;
  let data = {};
  try {
    data = JSON.parse(ev.content);
  } catch (_) { return null; }
  if (!data || typeof data !== 'object') return null;
  const pick = (key) => (typeof data[key] === 'string' ? data[key] : '');
  const profile = {
    pubkey: ev.pubkey,
    name: pick('display_name') || pick('name'),
    about: pick('about'),
    picture: safeUrl(pick('picture'), ['http:', 'https:']) || '',
    banner: safeUrl(pick('banner'), ['http:', 'https:']) || '',
    nip05: pick('nip05'),
    lud16: pick('lud16'),
    website: pick('website'),
  };
  if (!profile.name) profile.name = '';
  return profile;
}

function parseContactList(ev) {
  if (!ev || ev.kind !== 3) return null;
  const follows = [];
  for (const tag of ev.tags) {
    if (tag[0] === 'p' && isHex64(tag[1])) follows.push(tag[1]);
  }
  return { follows };
}

function parseRelayList(ev) {
  if (!ev || ev.kind !== 10002) return null;
  const read = new Set();
  const write = new Set();
  for (const tag of ev.tags) {
    if (tag[0] !== 'r') continue;
    const url = tag[1];
    if (typeof url !== 'string') continue;
    if (!/^wss?:\/\//i.test(url)) continue;
    const marker = tag[2];
    if (marker === 'read') read.add(url);
    else if (marker === 'write') write.add(url);
    else { read.add(url); write.add(url); }
  }
  return { read, write };
}

function parseComment(ev) {
  if (!ev || ev.kind !== 1111) return null;
  if (!isValidEvent(ev)) return null;
  return {
    id: ev.id,
    pubkey: ev.pubkey,
    created_at: ev.created_at,
    content: ev.content,
    tags: ev.tags,
  };
}

// ============================================================
// RELAY MANAGER
// ============================================================
class RelayManager {
  constructor() {
    this.connections = new Map();
    this.subs = new Map();
    this.statusListeners = new Set();
    this.pendingPublishes = new Map();
    this.subCounter = 0;
    this.writeRelays = new Set();
    this.readRelays = new Set();
  }

  onStatusChange(fn) {
    this.statusListeners.add(fn);
    return () => this.statusListeners.delete(fn);
  }

  notifyStatus(url) {
    for (const fn of this.statusListeners) {
      try { fn(url); } catch (e) { safeLog('error', 'statusListener', { error: String(e) }); }
    }
  }

  setWriteRelays(urls) { this.writeRelays = new Set(urls); }
  setReadRelays(urls) { this.readRelays = new Set(urls); }

  ensureConnection(url) {
    if (this.connections.has(url)) return this.connections.get(url);
    const conn = {
      url, ws: null, status: 'idle', attempt: 0, nextRetryAt: 0,
      subs: new Map(), invalidCount: 0, error: null,
    };
    this.connections.set(url, conn);
    this.connect(conn);
    return conn;
  }

  connect(conn) {
    if (conn.ws) {
      try { conn.ws.close(); } catch (_) {}
    }
    conn.status = 'connecting';
    conn.error = null;
    this.notifyStatus(conn.url);
    let ws;
    try {
      ws = new WebSocket(conn.url);
    } catch (e) {
      this.failConnect(conn, e);
      return;
    }
    conn.ws = ws;
    const timeoutId = setTimeout(() => {
      if (ws.readyState !== WebSocket.OPEN) {
        try { ws.close(); } catch (_) {}
        this.failConnect(conn, new Error('connect timeout'));
      }
    }, CONFIG.connectTimeoutMs);

    ws.onopen = () => {
      clearTimeout(timeoutId);
      conn.status = 'open';
      conn.attempt = 0;
      conn.error = null;
      this.notifyStatus(conn.url);
      for (const [subId, sub] of conn.subs) {
        this.sendReq(conn, subId, sub.filters);
      }
    };
    ws.onerror = () => { /* handled by onclose */ };
    ws.onclose = (ev) => {
      clearTimeout(timeoutId);
      conn.ws = null;
      if (conn.status === 'open' || conn.status === 'connecting') {
        this.scheduleReconnect(conn, ev.reason || 'closed');
      }
    };
    ws.onmessage = (ev) => this.handleMessage(conn, ev);
  }

  failConnect(conn, err) {
    conn.error = String(err && err.message || err);
    this.scheduleReconnect(conn, conn.error);
  }

  scheduleReconnect(conn, reason) {
    if (conn.attempt >= CONFIG.reconnectMaxAttempts) {
      conn.status = 'error';
      conn.error = reason;
      this.notifyStatus(conn.url);
      return;
    }
    conn.attempt++;
    const base = Math.min(CONFIG.reconnectBaseMs * Math.pow(2, conn.attempt - 1), CONFIG.reconnectCapMs);
    const jitter = Math.floor(Math.random() * 500);
    conn.nextRetryAt = Date.now() + base + jitter;
    conn.status = 'reconnecting';
    this.notifyStatus(conn.url);
    setTimeout(() => this.connect(conn), base + jitter);
  }

  handleMessage(conn, ev) {
    let msg;
    try {
      msg = JSON.parse(ev.data);
    } catch (_) {
      conn.invalidCount++;
      if (conn.invalidCount > 10) this.disconnectBad(conn);
      return;
    }
    if (!Array.isArray(msg) || msg.length < 2) {
      conn.invalidCount++;
      if (conn.invalidCount > 10) this.disconnectBad(conn);
      return;
    }
    const type = msg[0];
    if (type === 'EVENT' && msg.length >= 3) {
      const subId = msg[1];
      const event = msg[2];
      const sub = conn.subs.get(subId);
      if (sub && isValidEvent(event)) {
        try { sub.onEvent(event); } catch (e) { safeLog('error', 'subOnEvent', { error: String(e) }); }
      }
    } else if (type === 'EOSE' && msg.length >= 2) {
      const subId = msg[1];
      const sub = conn.subs.get(subId);
      if (sub && sub.onEose) {
        try { sub.onEose(); } catch (e) { safeLog('error', 'subOnEose', { error: String(e) }); }
      }
    } else if (type === 'OK' && msg.length >= 4) {
      const eventId = msg[1];
      const ok = !!msg[2];
      const errMsg = typeof msg[3] === 'string' ? msg[3] : '';
      const pending = this.pendingPublishes.get(eventId);
      if (pending && pending.has(conn.url)) {
        const { resolve, timeoutId } = pending.get(conn.url);
        clearTimeout(timeoutId);
        pending.delete(conn.url);
        if (pending.size === 0) this.pendingPublishes.delete(eventId);
        resolve({ url: conn.url, ok, error: errMsg });
      }
    }
  }

  disconnectBad(conn) {
    conn.status = 'error';
    conn.error = 'misbehaving relay';
    try { if (conn.ws) conn.ws.close(); } catch (_) {}
    this.notifyStatus(conn.url);
  }

  sendReq(conn, subId, filters) {
    if (!conn.ws || conn.ws.readyState !== WebSocket.OPEN) return;
    try {
      conn.ws.send(JSON.stringify(['REQ', subId].concat(filters)));
    } catch (e) {
      safeLog('error', 'sendReq', { error: String(e) });
    }
  }

  subscribe(filters, onEvent, onEose) {
    const subId = 'sub_' + (++this.subCounter);
    const sub = { filters, onEvent, onEose };
    this.subs.set(subId, sub);
    for (const conn of this.connections.values()) {
      conn.subs.set(subId, sub);
      this.sendReq(conn, subId, filters);
    }
    return () => {
      this.subs.delete(subId);
      for (const conn of this.connections.values()) {
        conn.subs.delete(subId);
        if (conn.ws && conn.ws.readyState === WebSocket.OPEN) {
          try { conn.ws.send(JSON.stringify(['CLOSE', subId])); } catch (_) {}
        }
      }
    };
  }

  publish(event) {
    const promises = [];
    const targets = [];
    if (this.writeRelays.size > 0) {
      for (const url of this.writeRelays) targets.push(url);
    } else {
      for (const url of this.connections.keys()) targets.push(url);
    }
    if (targets.length === 0) {
      return Promise.resolve([{ url: 'none', ok: false, error: 'no relays configured' }]);
    }
    for (const url of targets) {
      const conn = this.connections.get(url);
      if (!conn || !conn.ws || conn.ws.readyState !== WebSocket.OPEN) {
        promises.push(Promise.resolve({ url, ok: false, error: 'not connected' }));
        continue;
      }
      const p = new Promise((resolve) => {
        const timeoutId = setTimeout(() => {
          if (this.pendingPublishes.has(event.id)) {
            this.pendingPublishes.get(event.id).delete(url);
            if (this.pendingPublishes.get(event.id).size === 0) this.pendingPublishes.delete(event.id);
          }
          resolve({ url, ok: false, error: 'timeout' });
        }, CONFIG.publishTimeoutMs);
        if (!this.pendingPublishes.has(event.id)) this.pendingPublishes.set(event.id, new Map());
        this.pendingPublishes.get(event.id).set(url, { resolve, timeoutId });
        try {
          conn.ws.send(JSON.stringify(['EVENT', event]));
        } catch (e) {
          clearTimeout(timeoutId);
          this.pendingPublishes.get(event.id).delete(url);
          resolve({ url, ok: false, error: String(e) });
        }
      });
      promises.push(p);
    }
    return Promise.all(promises);
  }
}

// ============================================================
// STATE
// ============================================================
const state = {
  phase: 'boot',
  user: null,
  relays: new Map(),
  follows: new Set(),
  profiles: new Map(),
  posts: new Map(),
  feedAddresses: new Map(),
  comments: new Map(),
  route: { name: 'boot' },
  settings: {
    theme: 'system',
    fontSize: 'medium',
    editorMode: 'plain',
    zapsEnabled: false,
  },
  draftsByAddress: new Map(),
  invalidPostCount: 0,
  fatalError: null,
};

const relayManager = new RelayManager();
const stateSubscribers = new Set();

function subscribe(fn) {
  stateSubscribers.add(fn);
  return () => stateSubscribers.delete(fn);
}

let renderPending = false;
function requestRender() {
  if (renderPending) return;
  renderPending = true;
  queueMicrotask(() => {
    renderPending = false;
    try { render(); } catch (e) { safeLog('error', 'render', { error: String(e) }); }
  });
}

function notifyStateChange() {
  for (const fn of stateSubscribers) {
    try { fn(); } catch (e) { safeLog('error', 'stateSubscriber', { error: String(e) }); }
  }
  requestRender();
}

// ============================================================
// TOASTS
// ============================================================
function showToast(message, type) {
  const container = document.getElementById('toasts');
  if (!container) return;
  const toast = document.createElement('div');
  toast.className = 'toast' + (type ? ' toast-' + type : '');
  toast.textContent = String(message);
  container.appendChild(toast);
  setTimeout(() => {
    toast.style.opacity = '0';
    toast.style.transition = 'opacity .3s';
    setTimeout(() => { if (toast.parentNode) toast.parentNode.removeChild(toast); }, 320);
  }, 4000);
}

// ============================================================
// SETTINGS STORAGE
// ============================================================
function loadSettings() {
  try {
    const raw = localStorage.getItem(CONFIG.storageKeySettings);
    if (!raw) return;
    const parsed = JSON.parse(raw);
    if (!parsed || typeof parsed !== 'object') return;
    if (parsed.theme === 'light' || parsed.theme === 'dark' || parsed.theme === 'system') state.settings.theme = parsed.theme;
    if (parsed.fontSize === 'small' || parsed.fontSize === 'medium' || parsed.fontSize === 'large' || parsed.fontSize === 'xlarge') state.settings.fontSize = parsed.fontSize;
    if (parsed.editorMode === 'plain' || parsed.editorMode === 'preview') state.settings.editorMode = parsed.editorMode;
    if (typeof parsed.zapsEnabled === 'boolean') state.settings.zapsEnabled = parsed.zapsEnabled;
  } catch (e) {
    safeLog('warn', 'loadSettings', { error: String(e) });
  }
}

function saveSettings() {
  try {
    const payload = Object.assign({}, state.settings, { version: CONFIG.settingsVersion });
    localStorage.setItem(CONFIG.storageKeySettings, JSON.stringify(payload));
  } catch (e) {
    safeLog('error', 'saveSettings', { error: String(e) });
  }
}

function applyTheme() {
  const setting = state.settings.theme;
  let resolved = setting;
  if (setting === 'system') {
    resolved = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
  }
  document.documentElement.setAttribute('data-theme', resolved);
  document.documentElement.setAttribute('data-font-size', state.settings.fontSize);
}

// ============================================================
// RELAY CONFIG (NIP-65)
// ============================================================
let relayStatusListenerAttached = false;

function setRelay(url, read, write) {
  if (!url || !/^wss?:\/\//i.test(url)) return;
  let existing = state.relays.get(url);
  if (!existing) {
    existing = { url, read: false, write: false, status: 'idle', error: null };
    state.relays.set(url, existing);
  }
  existing.read = read;
  existing.write = write;
}

function applyRelayConfig() {
  const readUrls = [];
  const writeUrls = [];
  for (const [url, info] of state.relays) {
    if (info.read) readUrls.push(url);
    if (info.write) writeUrls.push(url);
  }
  relayManager.setReadRelays(readUrls);
  relayManager.setWriteRelays(writeUrls);
  const allUrls = Array.from(state.relays.keys()).slice(0, CONFIG.maxRelayConnections);
  for (const url of allUrls) {
    relayManager.ensureConnection(url);
  }
  if (!relayStatusListenerAttached) {
    relayStatusListenerAttached = true;
    relayManager.onStatusChange((url) => {
      const conn = relayManager.connections.get(url);
      const info = state.relays.get(url);
      if (info && conn) {
        info.status = conn.status;
        info.error = conn.error;
        notifyStateChange();
      }
    });
  }
}

async function fetchRelayList(pubkey) {
  return new Promise((resolve) => {
    const filters = [{ kinds: [10002], authors: [pubkey], limit: 1 }];
    let best = null;
    let done = false;
    const timeoutId = setTimeout(() => {
      if (!done) { done = true; resolve(best); }
    }, 5000);
    const unsub = relayManager.subscribe(
      filters,
      (ev) => {
        if (!isValidEvent(ev) || ev.kind !== 10002) return;
        if (best === null || ev.created_at > best.created_at) best = ev;
      },
      () => {
        if (!done) { done = true; clearTimeout(timeoutId); unsub(); resolve(best); }
      }
    );
  });
}

async function fetchContactList(pubkey) {
  return new Promise((resolve) => {
    const filters = [{ kinds: [3], authors: [pubkey], limit: 1 }];
    let best = null;
    let done = false;
    const timeoutId = setTimeout(() => {
      if (!done) { done = true; resolve(best); }
    }, 5000);
    const unsub = relayManager.subscribe(
      filters,
      (ev) => {
        if (!isValidEvent(ev) || ev.kind !== 3) return;
        if (best === null || ev.created_at > best.created_at) best = ev;
      },
      () => {
        if (!done) { done = true; clearTimeout(timeoutId); unsub(); resolve(best); }
      }
    );
  });
}

// ============================================================
// ROUTER
// ============================================================
function parseRoute() {
  const hash = window.location.hash || '#/';
  const path = hash.slice(1) || '/';
  try {
    if (path === '/' || path === '') return { name: 'feed' };
    if (path === '/compose') return { name: 'compose' };
    if (path === '/settings') return { name: 'settings' };
    if (path === '/relays') return { name: 'relays' };
    if (path.startsWith('/post/')) {
      const naddr = decodeURIComponent(path.slice(6));
      if (!naddr) return { name: 'not-found', path };
      return { name: 'post', naddr };
    }
    if (path.startsWith('/edit/')) {
      const naddr = decodeURIComponent(path.slice(6));
      if (!naddr) return { name: 'not-found', path };
      return { name: 'edit', naddr };
    }
    if (path.startsWith('/profile/')) {
      const npub = decodeURIComponent(path.slice(9));
      if (!npub) return { name: 'not-found', path };
      return { name: 'profile', npub };
    }
    if (path.startsWith('/note/')) {
      const note = decodeURIComponent(path.slice(6));
      if (!note) return { name: 'not-found', path };
      return { name: 'note', note };
    }
    return { name: 'not-found', path };
  } catch (e) {
    return { name: 'not-found', path };
  }
}

function navigate(newRoute) {
  window.location.hash = '#' + routeToPath(newRoute);
}

function routeToPath(route) {
  switch (route.name) {
    case 'feed': return '/';
    case 'compose': return '/compose';
    case 'settings': return '/settings';
    case 'relays': return '/relays';
    case 'post': return '/post/' + encodeURIComponent(route.naddr);
    case 'edit': return '/edit/' + encodeURIComponent(route.naddr);
    case 'profile': return '/profile/' + encodeURIComponent(route.npub);
    case 'note': return '/note/' + encodeURIComponent(route.note);
    default: return '/';
  }
}

function updateActiveNav() {
  const r = state.route.name;
  document.querySelectorAll('[data-nav]').forEach((a) => {
    const target = a.getAttribute('data-nav');
    let active = false;
    if (target === 'feed' && r === 'feed') active = true;
    else if (target === 'compose' && (r === 'compose' || r === 'edit')) active = true;
    else if (target === 'relays' && r === 'relays') active = true;
    else if (target === 'settings' && (r === 'settings' || r === 'profile')) active = true;
    a.classList.toggle('active', active);
  });
}

// ============================================================
// VIEW PRIMITIVES
// ============================================================
function renderHeader() {
  const isSignedIn = !!state.user;
  const header = el('header', { className: 'topbar' }, [
    el('div', { className: 'topbar-inner' }, [
      el('a', { className: 'logo', href: '#/', 'aria-label': 'Longform home' }, [
        document.createTextNode('Long'),
        el('span', { className: 'logo-accent', textContent: 'form' }),
      ]),
      el('nav', { className: 'topnav', 'aria-label': 'Primary' }, [
        el('a', { href: '#/', 'data-nav': 'feed', textContent: 'Feed' }),
        el('a', { href: '#/compose', 'data-nav': 'compose', textContent: 'Write' }),
        el('a', { href: '#/relays', 'data-nav': 'relays', textContent: 'Relays' }),
        el('a', { href: '#/settings', 'data-nav': 'settings', textContent: 'Settings' }),
      ]),
      el('div', { className: 'topnav-right' }, [
        isSignedIn ? renderUserBadge() : el('button', {
          className: 'btn btn-primary btn-sm',
          onclick: () => showSignInHelp(),
          textContent: 'Sign in',
        }),
      ]),
    ]),
  ]);
  return header;
}

function renderUserBadge() {
  if (!state.user) return el('span');
  const pubkey = state.user.pubkey;
  const npub = npubEncode(pubkey);
  return el('a', {
    href: '#/profile/' + npub,
    className: 'row',
    'aria-label': 'Your profile',
    style: 'gap:.4rem;text-decoration:none;color:inherit;',
  }, [
    renderAvatar(pubkey, 28),
  ]);
}

function renderAvatar(pubkey, size) {
  const profile = state.profiles.get(pubkey);
  const sz = size || 32;
  if (profile && profile.picture) {
    const img = document.createElement('img');
    img.className = 'avatar' + (sz <= 24 ? ' avatar-sm' : '') + (sz >= 64 ? ' avatar-lg' : '');
    img.src = profile.picture;
    img.alt = '';
    img.style.width = sz + 'px';
    img.style.height = sz + 'px';
    img.referrerPolicy = 'no-referrer';
    img.loading = 'lazy';
    img.onerror = function () {
      if (img.parentNode) img.parentNode.replaceChild(renderAvatarFallback(pubkey, sz), img);
    };
    return img;
  }
  return renderAvatarFallback(pubkey, sz);
}

function renderAvatarFallback(pubkey, size) {
  const sz = size || 32;
  const div = document.createElement('span');
  div.className = 'avatar avatar-fallback' + (sz <= 24 ? ' avatar-sm' : '') + (sz >= 64 ? ' avatar-lg' : '');
  div.style.width = sz + 'px';
  div.style.height = sz + 'px';
  div.style.background = colorFromPubkey(pubkey || '');
  div.textContent = (pubkey || '?').slice(0, 1).toUpperCase();
  return div;
}

function renderBottomNav() {
  return el('nav', { className: 'bottom-nav', 'aria-label': 'Primary' }, [
    el('a', { href: '#/', 'data-nav': 'feed' }, [el('span', { className: 'nav-icon', textContent: '🏠' }), el('span', { textContent: 'Feed' })]),
    el('a', { href: '#/compose', 'data-nav': 'compose' }, [el('span', { className: 'nav-icon', textContent: '✏️' }), el('span', { textContent: 'Write' })]),
    el('a', { href: '#/relays', 'data-nav': 'relays' }, [el('span', { className: 'nav-icon', textContent: '🛰️' }), el('span', { textContent: 'Relays' })]),
    el('a', { href: '#/settings', 'data-nav': 'settings' }, [el('span', { className: 'nav-icon', textContent: '⚙️' }), el('span', { textContent: 'You' })]),
  ]);
}

function renderFooter() {
  return el('footer', { className: 'app-footer' }, [
    el('p', { textContent: 'Longform — a decentralized blog on Nostr. No accounts, no tracking, no algorithm.' }),
    el('p', { textContent: 'Trust model: relays you choose are trusted to return events truthfully. Longform does not verify event signatures on read (small-file trade-off). Content is rendered via safe DOM construction, never innerHTML from untrusted sources.' }),
    el('p', { textContent: 'Open source, no telemetry, no cookies.' }),
  ]);
}

// ============================================================
// VIEWS (return the view content, NOT a shell)
// ============================================================
function renderFatalInline(e) {
  return el('div', { className: 'card' }, [
    el('h2', { textContent: 'Something went wrong' }),
    el('p', { className: 'muted', textContent: 'This view crashed. Details below.' }),
    el('pre', { className: 'muted', style: 'white-space:pre-wrap;overflow:auto;font-size:.8rem;', textContent: String(e && e.stack || e) }),
    el('button', {
      className: 'btn btn-primary mt-2',
      textContent: 'Reload',
      onclick: () => window.location.reload(),
    }),
  ]);
}

function renderNoSignerView() {
  const diag = signerDiagnostic();
  const isFile = diag.protocol === 'file:';
  const wrap = el('div', { className: 'card' }, [
    el('h2', { textContent: 'Read-only mode' }),
    el('p', { className: 'muted', textContent: 'Longform needs a NIP-07 browser extension to sign in. Without one you can still read any post you open by link.' }),
    el('div', { className: 'mt-2', style: 'background:var(--bg-soft);padding:1rem;border-radius:var(--radius);font-size:.85rem;' }, [
      el('p', { style: 'margin:0 0 .5rem;font-weight:600;', textContent: 'Signer diagnostic:' }),
      el('ul', { style: 'margin:0;padding-left:1.25rem;' }, [
        el('li', { textContent: 'window.nostr present: ' + (diag.hasNostrObj ? '✓' : '✗') }),
        el('li', { textContent: 'getPublicKey method: ' + (diag.hasGetPublicKey ? '✓' : '✗') }),
        el('li', { textContent: 'signEvent method: ' + (diag.hasSignEvent ? '✓' : '✗') }),
        el('li', { textContent: 'Protocol: ' + diag.protocol }),
      ]),
    ]),
    el('div', { className: 'mt-2' }, [
      el('p', { textContent: 'Install a NIP-07 signer extension for desktop browsers:' }),
      el('ul', { style: 'text-align:left;display:inline-block;margin-top:.5rem;' }, [
        el('li', {}, [el('a', { href: 'https://getalby.com', target: '_blank', rel: 'noopener noreferrer', textContent: 'Alby' }), document.createTextNode(' — browser extension')]),
        el('li', {}, [el('a', { href: 'https://github.com/fiatjaf/nos2x', target: '_blank', rel: 'noopener noreferrer', textContent: 'nos2x' }), document.createTextNode(' — minimal NIP-07 signer')]),
      ]),
    ]),
    el('p', { className: 'muted mt-2', style: 'font-size:.85rem;', textContent: 'On mobile (iPhone / Android), browsers do not support NIP-07 extensions. Use a NIP-46 remote signer app (Amber on Android, nsec.app in a browser) and a NIP-46-compatible client.' }),
    isFile ? el('p', { className: 'mt-2', style: 'font-size:.85rem;color:var(--danger);', textContent: 'Note: you are running from file://. Most browser extensions refuse to inject scripts into file:// pages. Serve Longform from http://localhost or https:// for the signer to work.' }) : null,
    el('div', { className: 'row mt-2' }, [
      el('button', {
        className: 'btn btn-primary',
        textContent: 'Check again',
        onclick: async () => {
          const btn = document.activeElement;
          if (btn && btn.disabled !== undefined) btn.disabled = true;
          const found = await waitForSigner(2000);
          if (found) {
            state.phase = 'boot';
            boot();
          } else {
            showToast('Still no signer detected. Install or enable a NIP-07 extension, then reload.', 'error');
            if (btn && btn.disabled !== undefined) btn.disabled = false;
          }
        },
      }),
      el('button', {
        className: 'btn btn-secondary',
        textContent: 'Reload page',
        onclick: () => window.location.reload(),
      }),
    ]),
  ]);
  return wrap;
}

function renderConnectingView() {
  return el('div', { className: 'card text-center' }, [
    el('div', { className: 'loading' }),
    el('p', { className: 'mt-1', textContent: 'Connecting to relays…' }),
  ]);
}

function renderFatalView() {
  return el('div', { className: 'card' }, [
    el('h2', { textContent: 'Could not start Longform' }),
    el('p', { className: 'muted', textContent: 'An unexpected error occurred.' }),
    el('button', { className: 'btn btn-primary', textContent: 'Reload', onclick: () => window.location.reload() }),
  ]);
}

function renderFeedView() {
  const wrap = el('div');
  if (!state.user) {
    wrap.appendChild(renderNoSignerView());
    return wrap;
  }
  if (!state.follows || state.follows.size === 0) {
    wrap.appendChild(el('div', { className: 'empty' }, [
      el('h2', { textContent: 'No follows yet' }),
      el('p', { textContent: 'Longform shows a chronological feed of posts from people you follow on Nostr. Follow someone to see their posts here.' }),
      el('p', { textContent: 'You can also open a post by pasting a nostr:naddr1… link in the address bar as #/post/naddr1…' }),
      el('button', {
        className: 'btn btn-primary',
        textContent: 'Write your first post',
        onclick: () => navigate({ name: 'compose' }),
      }),
    ]));
    return wrap;
  }
  const ids = [];
  for (const [addr, eventId] of state.feedAddresses) {
    const post = state.posts.get(eventId);
    if (post) ids.push({ addr, post });
  }
  ids.sort((a, b) => {
    if (b.post.created_at !== a.post.created_at) return b.post.created_at - a.post.created_at;
    return a.post.id < b.post.id ? -1 : 1;
  });
  if (ids.length === 0) {
    wrap.appendChild(el('div', { className: 'empty' }, [
      el('h2', { textContent: 'Loading posts…' }),
      el('p', { textContent: 'Fetching the latest posts from your follows. This may take a moment as relays respond.' }),
    ]));
    return wrap;
  }
  const list = el('div', { className: 'card', style: 'padding:0 1.25rem;' });
  for (const { post } of ids) {
    list.appendChild(renderFeedItem(post));
  }
  wrap.appendChild(list);
  if (state.invalidPostCount > 0) {
    wrap.appendChild(el('p', { className: 'muted text-center', style: 'font-size:.8rem;margin-top:1rem;',
      textContent: 'Skipped ' + state.invalidPostCount + ' malformed post(s).' }));
  }
  return wrap;
}

function renderFeedItem(post) {
  const naddr = safeNaddrForPost(post);
  const profile = state.profiles.get(post.pubkey);
  const summary = post.summary || excerpt(post.content, 160);
  const item = el('article', { className: 'post-item', tabindex: '0', role: 'link', 'aria-label': post.title }, [
    el('h3', { className: 'post-title', textContent: post.title }),
    el('div', { className: 'post-meta' }, [
      renderAvatar(post.pubkey, 20),
      el('span', { textContent: profile ? profile.name : post.pubkey.slice(0, 8) + '…' }),
      el('span', { textContent: '·' }),
      el('span', { textContent: formatTime(post.publishedAt) }),
    ]),
    summary ? el('p', { className: 'post-summary', textContent: summary }) : null,
  ]);
  const go = () => { if (naddr) navigate({ name: 'post', naddr }); };
  item.addEventListener('click', go);
  item.addEventListener('keydown', (e) => {
    if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); go(); }
  });
  return item;
}

function excerpt(text, maxLen) {
  if (!text) return '';
  const cleaned = text
    .replace(/```[\s\S]*?```/g, '')
    .replace(/`[^`]+`/g, '')
    .replace(/!\[[^\]]*\]\([^)]*\)/g, '')
    .replace(/\[([^\]]+)\]\([^)]*\)/g, '$1')
    .replace(/[#>*_~\-]{2,}/g, ' ')
    .replace(/\s+/g, ' ')
    .trim();
  if (cleaned.length <= maxLen) return cleaned;
  return cleaned.slice(0, maxLen).replace(/\s+\S*$/, '') + '…';
}

function safeNaddrForPost(post) {
  try {
    return naddrEncode({ identifier: post.d, pubkey: post.pubkey, kind: 30023 });
  } catch (_) { return null; }
}

function renderPostView(naddr) {
  const wrap = el('div');
  let decoded;
  try { decoded = naddrDecode(naddr); } catch (_) { decoded = null; }
  if (!decoded || decoded.kind !== 30023) {
    wrap.appendChild(el('div', { className: 'empty' }, [
      el('h2', { textContent: 'Post not found' }),
      el('p', { textContent: 'The link is malformed or not a long-form post (kind 30023).' }),
      el('button', { className: 'btn btn-primary', textContent: 'Back to feed', onclick: () => navigate({ name: 'feed' }) }),
    ]));
    return wrap;
  }
  const addr = '30023:' + decoded.pubkey + ':' + decoded.identifier;
  const key = decoded.pubkey + ':' + decoded.identifier;
  const eventId = state.feedAddresses.get(key);
  const post = eventId ? state.posts.get(eventId) : null;
  if (!post) {
    wrap.appendChild(el('div', { className: 'card text-center' }, [
      el('div', { className: 'loading' }),
      el('p', { className: 'mt-1', textContent: 'Loading post…' }),
    ]));
    loadPostAndComments(naddr, decoded, addr);
    return wrap;
  }
  const profile = state.profiles.get(decoded.pubkey);
  const naddrStr = safeNaddrForPost(post);
  const isAuthor = state.user && state.user.pubkey === post.pubkey;

  const article = el('article', { className: 'card' });
  const header = el('header', { className: 'post-header' }, [
    el('h1', { textContent: post.title }),
    el('div', { className: 'byline' }, [
      renderAvatar(post.pubkey, 32),
      el('div', {}, [
        el('div', { style: 'color:var(--fg);font-weight:500;', textContent: profile ? profile.name : post.pubkey.slice(0, 12) + '…' }),
        el('div', { style: 'font-size:.82rem;', textContent: formatTime(post.publishedAt) }),
      ]),
    ]),
  ]);
  article.appendChild(header);
  if (post.image) {
    try { article.appendChild(makeImage('', post.image)); } catch (_) {}
  }
  article.appendChild(renderMarkdown(post.content || ''));
  if (post.tags.length > 0) {
    const tagWrap = el('div', { className: 'post-tags' });
    for (const tag of post.tags) {
      tagWrap.appendChild(el('span', { className: 'tag-pill', textContent: '#' + tag }));
    }
    article.appendChild(tagWrap);
  }
  const actions = el('div', { className: 'post-actions' }, [
    el('button', {
      className: 'btn btn-secondary btn-sm',
      textContent: 'Copy as Markdown',
      onclick: () => copyText(post.content || ''),
    }),
    el('button', {
      className: 'btn btn-secondary btn-sm',
      textContent: 'Copy raw event',
      onclick: () => copyText(JSON.stringify(post.raw, null, 2)),
    }),
    el('button', {
      className: 'btn btn-secondary btn-sm',
      textContent: 'Copy naddr',
      onclick: () => { if (naddrStr) copyText('nostr:' + naddrStr); },
    }),
    isAuthor ? el('button', {
      className: 'btn btn-secondary btn-sm',
      textContent: 'Edit',
      onclick: () => { if (naddrStr) navigate({ name: 'edit', naddr: naddrStr }); },
    }) : null,
  ]);
  article.appendChild(actions);
  wrap.appendChild(article);

  const commentList = state.comments.get(addr);
  const commentSection = el('section', { className: 'comments-section card' });
  commentSection.appendChild(el('h2', { textContent: 'Comments' }));
  const sortedComments = commentList ? Array.from(commentList.values()).sort((a, b) => a.created_at - b.created_at) : [];
  if (sortedComments.length === 0) {
    commentSection.appendChild(el('p', { className: 'muted', textContent: 'No comments yet.' }));
  } else {
    for (const comment of sortedComments) {
      commentSection.appendChild(renderCommentItem(comment));
    }
  }
  if (state.user) {
    commentSection.appendChild(renderCommentComposer(addr, decoded.pubkey));
  } else {
    commentSection.appendChild(el('p', { className: 'muted mt-2', textContent: 'Install a NIP-07 signer to comment.' }));
  }
  wrap.appendChild(commentSection);

  if (!state.comments.has(addr) || !profile) {
    loadPostAndComments(naddr, decoded, addr);
  }
  return wrap;
}

const loadingAddresses = new Set();
function loadPostAndComments(naddr, decoded, addr) {
  if (loadingAddresses.has(addr)) return;
  loadingAddresses.add(addr);
  const safetyTimeout = setTimeout(() => {
    loadingAddresses.delete(addr);
  }, 15000);
  relayManager.subscribe(
    [{ kinds: [30023], authors: [decoded.pubkey], '#d': [decoded.identifier], limit: 1 }],
    (event) => { handlePostEvent(event); },
    () => { clearTimeout(safetyTimeout); loadingAddresses.delete(addr); }
  );
  if (!state.profiles.has(decoded.pubkey)) {
    relayManager.subscribe(
      [{ kinds: [0], authors: [decoded.pubkey], limit: 1 }],
      (event) => { handleProfileEvent(event); }
    );
  }
  if (!state.comments.has(addr)) {
    state.comments.set(addr, new Map());
    relayManager.subscribe(
      [{ kinds: [1111], '#A': [addr], limit: CONFIG.commentsLimit }],
      (event) => { handleCommentEvent(event, addr); }
    );
    relayManager.subscribe(
      [{ kinds: [1111], '#a': [addr], limit: CONFIG.commentsLimit }],
      (event) => { handleCommentEvent(event, addr); }
    );
  }
}

function renderCommentItem(comment) {
  const profile = state.profiles.get(comment.pubkey);
  return el('div', { className: 'comment' }, [
    el('div', { className: 'comment-header' }, [
      renderAvatar(comment.pubkey, 24),
      el('span', { className: 'comment-author', textContent: profile ? profile.name : comment.pubkey.slice(0, 8) + '…' }),
      el('span', { className: 'comment-time', textContent: formatTime(comment.created_at) }),
    ]),
    el('div', { className: 'comment-body' }, [renderMarkdown(comment.content || '')]),
  ]);
}

function renderCommentComposer(rootAddr, rootAuthor) {
  const form = el('form', { className: 'mt-2', onsubmit: (e) => e.preventDefault() });
  const textarea = el('textarea', {
    'data-persist-id': 'comment-body',
    placeholder: 'Write a comment…',
    style: 'min-height:100px;',
  });
  const submit = el('button', { className: 'btn btn-primary', type: 'submit', textContent: 'Post comment' });
  form.appendChild(textarea);
  form.appendChild(el('div', { className: 'row mt-1' }, [submit]));
  form.addEventListener('submit', async (e) => {
    e.preventDefault();
    const content = textarea.value.trim();
    if (!content) return;
    if (!state.user) { showToast('Sign in first', 'error'); return; }
    submit.disabled = true;
    submit.textContent = 'Signing…';
    try {
      const unsigned = {
        created_at: Math.floor(Date.now() / 1000),
        kind: 1111,
        content,
        tags: [
          ['A', rootAddr],
          ['K', '30023'],
          ['P', rootAuthor],
          ['a', rootAddr],
          ['k', '30023'],
          ['p', rootAuthor],
        ],
      };
      const signed = await window.nostr.signEvent(unsigned);
      if (!signed || !isValidEvent(signed)) throw new Error('signer returned invalid event');
      submit.textContent = 'Publishing…';
      const results = await relayManager.publish(signed);
      const ok = results.filter((r) => r.ok).length;
      if (ok > 0) {
        textarea.value = '';
        showToast('Comment published to ' + ok + ' of ' + results.length + ' relays', 'success');
        handleCommentEvent(signed, rootAddr);
      } else {
        showToast('Failed to publish comment — check your relays', 'error');
      }
    } catch (err) {
      safeLog('error', 'commentPublish', { error: String(err) });
      showToast('Could not publish comment: ' + (err && err.message ? err.message : 'unknown'), 'error');
    } finally {
      submit.disabled = false;
      submit.textContent = 'Post comment';
    }
  });
  return form;
}

function renderComposeView(prefill) {
  if (!state.user) {
    const wrap = el('div');
    wrap.appendChild(renderNoSignerView());
    return wrap;
  }
  const wrap = el('div');
  wrap.appendChild(el('h1', { textContent: prefill ? 'Edit post' : 'New post', style: 'font-size:1.4rem;margin:1rem 0;' }));

  const form = el('form', { onsubmit: (e) => e.preventDefault() });

  const titleInput = el('input', {
    type: 'text',
    'data-persist-id': 'compose-title',
    placeholder: 'Title',
    value: prefill ? prefill.title : '',
    required: 'required',
    maxlength: '200',
  });
  const summaryInput = el('input', {
    type: 'text',
    'data-persist-id': 'compose-summary',
    placeholder: 'Short summary (optional)',
    value: prefill ? prefill.summary : '',
    maxlength: '500',
  });
  const imageInput = el('input', {
    type: 'url',
    'data-persist-id': 'compose-image',
    placeholder: 'Hero image URL (optional)',
    value: prefill ? prefill.image : '',
  });
  const tagsInput = el('input', {
    type: 'text',
    'data-persist-id': 'compose-tags',
    placeholder: 'Tags, comma separated (optional)',
    value: prefill ? prefill.tags.join(', ') : '',
  });
  const dInput = el('input', {
    type: 'text',
    'data-persist-id': 'compose-d',
    placeholder: 'URL slug (auto from title)',
    value: prefill ? prefill.d : '',
  });
  const contentInput = el('textarea', {
    'data-persist-id': 'compose-content',
    placeholder: 'Write your post in Markdown…',
    required: 'required',
    value: prefill ? prefill.content : '',
  });

  const previewWrap = el('div', { className: 'card', style: 'margin-top:1rem;display:none;' });

  const formFields = el('div', { className: 'card' }, [
    el('div', { className: 'field' }, [el('label', { textContent: 'Title' }), titleInput]),
    el('div', { className: 'field' }, [el('label', { textContent: 'Summary' }), summaryInput]),
    el('div', { className: 'field' }, [el('label', { textContent: 'Hero image URL' }), imageInput]),
    el('div', { className: 'field' }, [el('label', { textContent: 'Tags' }), tagsInput, el('div', { className: 'field-hint', textContent: 'Comma-separated. Each becomes a t tag.' })]),
    el('div', { className: 'field' }, [el('label', { textContent: 'URL slug (d tag)' }), dInput, el('div', { className: 'field-hint', textContent: 'Auto-generated from title if blank. Editing an existing post? Keep the same slug.' })]),
    el('div', { className: 'field' }, [el('label', { textContent: 'Content (Markdown)' }), contentInput]),
    el('div', { className: 'row mt-2' }, [
      el('button', {
        type: 'button',
        className: 'btn btn-secondary',
        textContent: 'Preview',
        onclick: () => {
          clearNode(previewWrap);
          previewWrap.style.display = 'block';
          previewWrap.appendChild(renderMarkdown(contentInput.value || '*Nothing to preview yet.*'));
        },
      }),
      el('button', {
        type: 'button',
        className: 'btn btn-secondary',
        textContent: 'Save draft',
        onclick: () => saveDraft(titleInput.value, summaryInput.value, contentInput.value, tagsInput.value, dInput.value, imageInput.value),
      }),
    ]),
  ]);

  const publishBtn = el('button', { type: 'submit', className: 'btn btn-primary', textContent: prefill ? 'Publish update' : 'Publish' });

  form.appendChild(formFields);
  form.appendChild(previewWrap);
  form.appendChild(el('div', { className: 'row mt-2' }, [publishBtn]));

  form.addEventListener('submit', async (e) => {
    e.preventDefault();
    const title = titleInput.value.trim();
    const content = contentInput.value.trim();
    if (!title) { showToast('Title is required', 'error'); titleInput.focus(); return; }
    if (!content) { showToast('Content is required', 'error'); contentInput.focus(); return; }
    if (!state.user) { showToast('Sign in first', 'error'); return; }
    if (!hasWorkingSigner()) { showToast('Signer not available', 'error'); return; }
    const d = dInput.value.trim() || slugify(title);
    const summary = summaryInput.value.trim();
    const image = imageInput.value.trim();
    const tags = tagsInput.value.split(',').map((t) => t.trim().toLowerCase()).filter(Boolean).slice(0, 10);
    const tagsList = [['d', d], ['title', title]];
    if (summary) tagsList.push(['summary', summary]);
    if (image && /^https?:\/\//i.test(image)) tagsList.push(['image', image]);
    tagsList.push(['published_at', String(Math.floor(Date.now() / 1000))]);
    for (const t of tags) tagsList.push(['t', t]);
    const unsigned = {
      kind: 30023,
      created_at: Math.floor(Date.now() / 1000),
      content,
      tags: tagsList,
    };
    publishBtn.disabled = true;
    publishBtn.textContent = 'Signing…';
    try {
      const signed = await window.nostr.signEvent(unsigned);
      if (!signed || !isValidEvent(signed)) throw new Error('Signer returned invalid event');
      publishBtn.textContent = 'Publishing…';
      const results = await relayManager.publish(signed);
      const ok = results.filter((r) => r.ok).length;
      if (ok > 0) {
        showToast('Published to ' + ok + ' of ' + results.length + ' relays', 'success');
        handlePostEvent(signed);
        const naddr = naddrEncode({ identifier: d, pubkey: state.user.pubkey, kind: 30023 });
        navigate({ name: 'post', naddr });
      } else {
        showToast('No relay accepted the post. Check your relay list.', 'error');
      }
    } catch (err) {
      safeLog('error', 'publishPost', { error: String(err) });
      showToast('Publish failed: ' + (err && err.message ? err.message : 'unknown'), 'error');
    } finally {
      publishBtn.disabled = false;
      publishBtn.textContent = prefill ? 'Publish update' : 'Publish';
    }
  });

  wrap.appendChild(form);

  try {
    const raw = localStorage.getItem(CONFIG.storageKeyDraft);
    if (raw && !prefill) {
      const draft = JSON.parse(raw);
      if (draft && draft.version === 1 && draft.data) {
        if (!titleInput.value) titleInput.value = draft.data.title || '';
        if (!summaryInput.value) summaryInput.value = draft.data.summary || '';
        if (!contentInput.value) contentInput.value = draft.data.content || '';
        if (!tagsInput.value) tagsInput.value = draft.data.tags || '';
        if (!dInput.value) dInput.value = draft.data.d || '';
        if (!imageInput.value) imageInput.value = draft.data.image || '';
        if (draft.data.content) showToast('Restored draft');
      }
    }
  } catch (_) {}

  return wrap;
}

function saveDraft(title, summary, content, tags, d, image) {
  try {
    const payload = {
      version: 1,
      savedAt: Date.now(),
      data: { title, summary, content, tags, d, image },
    };
    localStorage.setItem(CONFIG.storageKeyDraft, JSON.stringify(payload));
    showToast('Draft saved locally', 'success');
  } catch (e) {
    safeLog('error', 'saveDraft', { error: String(e) });
    showToast('Could not save draft', 'error');
  }
}

function renderEditView(naddr) {
  let decoded;
  try { decoded = naddrDecode(naddr); } catch (_) { decoded = null; }
  if (!decoded || decoded.kind !== 30023) {
    return el('div', { className: 'card' }, [el('p', { textContent: 'Invalid post link.' })]);
  }
  if (!state.user || state.user.pubkey !== decoded.pubkey) {
    return el('div', { className: 'card' }, [el('p', { textContent: 'You can only edit your own posts.' })]);
  }
  const key = decoded.pubkey + ':' + decoded.identifier;
  const eventId = state.feedAddresses.get(key);
  const post = eventId ? state.posts.get(eventId) : null;
  if (!post) {
    loadPostAndComments(naddr, decoded, '30023:' + decoded.pubkey + ':' + decoded.identifier);
    return el('div', { className: 'card text-center' }, [
      el('div', { className: 'loading' }),
      el('p', { className: 'mt-1', textContent: 'Loading post…' }),
    ]);
  }
  return renderComposeView({
    title: post.title,
    summary: post.summary,
    image: post.image,
    tags: post.tags,
    d: post.d,
    content: post.content,
  });
}

function renderRelaysView() {
  const wrap = el('div');
  wrap.appendChild(el('h1', { textContent: 'Relays', style: 'font-size:1.4rem;margin:1rem 0;' }));
  wrap.appendChild(el('p', { className: 'muted', textContent: 'Relays store and distribute events. Longform connects only to the relays you list here. Your relay list is published as a NIP-65 (kind 10002) event.' }));

  if (state.user) {
    const syncBtn = el('button', {
      className: 'btn btn-secondary btn-sm',
      textContent: 'Import from my NIP-65 list',
      onclick: async () => {
        syncBtn.disabled = true;
        syncBtn.textContent = 'Fetching…';
        try {
          const ev = await fetchRelayList(state.user.pubkey);
          if (!ev) { showToast('No kind 10002 found on current relays', 'error'); return; }
          const parsed = parseRelayList(ev);
          if (!parsed) { showToast('Malformed relay list', 'error'); return; }
          const curWrite = (url) => !!state.relays.get(url)?.write;
          const curRead = (url) => !!state.relays.get(url)?.read;
          for (const url of parsed.read) setRelay(url, true, curWrite(url));
          for (const url of parsed.write) setRelay(url, curRead(url), true);
          applyRelayConfig();
          showToast('Merged ' + (parsed.read.size + parsed.write.size) + ' entries from NIP-65');
          requestRender();
        } catch (e) {
          safeLog('error', 'importRelayList', { error: String(e) });
          showToast('Import failed', 'error');
        } finally {
          syncBtn.disabled = false;
          syncBtn.textContent = 'Import from my NIP-65 list';
        }
      },
    });
    wrap.appendChild(el('div', { className: 'row mt-2' }, [syncBtn]));
  }

  const urlInput = el('input', { type: 'url', placeholder: 'wss://relay.example.com', 'data-persist-id': 'relay-url' });
  const addBtn = el('button', { className: 'btn btn-primary', type: 'button', textContent: 'Add' });
  const addForm = el('div', { className: 'card' }, [
    el('div', { className: 'field' }, [el('label', { textContent: 'Add a relay' }), urlInput]),
    el('div', { className: 'row' }, [addBtn]),
  ]);
  addBtn.addEventListener('click', () => {
    const raw = urlInput.value.trim();
    if (!/^wss?:\/\//i.test(raw)) { showToast('Must start with wss://', 'error'); return; }
    try { new URL(raw); } catch (_) { showToast('Invalid URL', 'error'); return; }
    setRelay(raw, true, true);
    applyRelayConfig();
    urlInput.value = '';
    showToast('Relay added');
    requestRender();
  });
  wrap.appendChild(addForm);

  if (state.relays.size === 0) {
    wrap.appendChild(el('div', { className: 'empty' }, [
      el('h2', { textContent: 'No relays configured' }),
      el('p', { textContent: 'Add a relay above or use the default set.' }),
      el('button', {
        className: 'btn btn-secondary',
        textContent: 'Use default relays',
        onclick: () => {
          for (const url of CONFIG.defaultRelays) setRelay(url, true, true);
          applyRelayConfig();
          requestRender();
        },
      }),
    ]));
  } else {
    const listCard = el('div', { className: 'card' });
    const sorted = Array.from(state.relays.values()).sort((a, b) => a.url.localeCompare(b.url));
    for (const info of sorted) {
      listCard.appendChild(renderRelayRow(info));
    }
    wrap.appendChild(listCard);
    wrap.appendChild(el('div', { className: 'row mt-2' }, [
      el('button', {
        className: 'btn btn-primary',
        textContent: 'Save relay list (NIP-65)',
        onclick: async (e) => {
          if (!state.user) { showToast('Sign in first', 'error'); return; }
          const btn = e.currentTarget;
          btn.disabled = true;
          btn.textContent = 'Signing…';
          try {
            const tags = [];
            for (const [url, info] of state.relays) {
              if (info.read && info.write) tags.push(['r', url]);
              else if (info.read) tags.push(['r', url, 'read']);
              else if (info.write) tags.push(['r', url, 'write']);
            }
            const unsigned = { kind: 10002, created_at: Math.floor(Date.now() / 1000), tags, content: '' };
            const signed = await window.nostr.signEvent(unsigned);
            if (!signed || !isValidEvent(signed)) throw new Error('invalid signer response');
            btn.textContent = 'Publishing…';
            const results = await relayManager.publish(signed);
            const ok = results.filter((r) => r.ok).length;
            showToast('Relay list saved to ' + ok + ' of ' + results.length + ' relays', ok > 0 ? 'success' : 'error');
          } catch (err) {
            safeLog('error', 'saveRelayList', { error: String(err) });
            showToast('Save failed', 'error');
          } finally {
            btn.disabled = false;
            btn.textContent = 'Save relay list (NIP-65)';
          }
        },
      }),
    ]));
  }
  return wrap;
}

function renderRelayRow(info) {
  const statusClass = 'status status-' + (info.status || 'idle');
  const statusDot = el('span', { className: 'status-dot' });
  const readBtn = el('button', {
    className: 'relay-marker-btn' + (info.read ? ' active' : ''),
    textContent: 'Read',
    'aria-label': 'Toggle read for ' + info.url,
    onclick: () => { info.read = !info.read; applyRelayConfig(); requestRender(); },
  });
  const writeBtn = el('button', {
    className: 'relay-marker-btn' + (info.write ? ' active' : ''),
    textContent: 'Write',
    'aria-label': 'Toggle write for ' + info.url,
    onclick: () => { info.write = !info.write; applyRelayConfig(); requestRender(); },
  });
  const removeBtn = el('button', {
    className: 'relay-marker-btn',
    textContent: 'Remove',
    'aria-label': 'Remove ' + info.url,
    onclick: () => { state.relays.delete(info.url); applyRelayConfig(); requestRender(); },
  });
  return el('div', { className: 'relay-row' }, [
    el('span', { className: statusClass, title: info.error || '' }, [statusDot]),
    el('span', { className: 'relay-url', textContent: info.url }),
    el('div', { className: 'relay-markers' }, [readBtn, writeBtn, removeBtn]),
  ]);
}

function renderSettingsView() {
  const wrap = el('div');
  wrap.appendChild(el('h1', { textContent: 'Settings', style: 'font-size:1.4rem;margin:1rem 0;' }));

  const card1 = el('div', { className: 'card' });
  card1.appendChild(el('h2', { textContent: 'Appearance', style: 'font-size:1.05rem;margin:0 0 1rem;' }));

  const themeSelect = el('select', { 'data-persist-id': 'setting-theme' });
  for (const t of ['system', 'light', 'dark']) {
    const opt = el('option', { value: t, textContent: t.charAt(0).toUpperCase() + t.slice(1) });
    if (state.settings.theme === t) opt.selected = true;
    themeSelect.appendChild(opt);
  }
  themeSelect.addEventListener('change', () => {
    state.settings.theme = themeSelect.value;
    applyTheme();
    saveSettings();
  });

  const sizeSelect = el('select', { 'data-persist-id': 'setting-size' });
  for (const s of ['small', 'medium', 'large', 'xlarge']) {
    const opt = el('option', { value: s, textContent: s.charAt(0).toUpperCase() + s.slice(1) });
    if (state.settings.fontSize === s) opt.selected = true;
    sizeSelect.appendChild(opt);
  }
  sizeSelect.addEventListener('change', () => {
    state.settings.fontSize = sizeSelect.value;
    applyTheme();
    saveSettings();
  });

  card1.appendChild(el('div', { className: 'field' }, [el('label', { textContent: 'Theme' }), themeSelect]));
  card1.appendChild(el('div', { className: 'field' }, [el('label', { textContent: 'Font size' }), sizeSelect]));
  wrap.appendChild(card1);

  const card2 = el('div', { className: 'card' });
  card2.appendChild(el('h2', { textContent: 'Account', style: 'font-size:1.05rem;margin:0 0 1rem;' }));
  if (state.user) {
    const npub = npubEncode(state.user.pubkey);
    card2.appendChild(el('p', { className: 'muted', textContent: 'Signed in as:' }));
    card2.appendChild(el('p', {}, [el('code', { style: 'word-break:break-all;font-size:.8rem;', textContent: npub })]));
    card2.appendChild(el('div', { className: 'row mt-2' }, [
      el('button', {
        className: 'btn btn-secondary btn-sm',
        textContent: 'Copy npub',
        onclick: () => copyText(npub),
      }),
    ]));
  } else {
    card2.appendChild(el('p', { className: 'muted', textContent: 'Not signed in. Install a NIP-07 signer extension to sign in.' }));
  }
  wrap.appendChild(card2);

  const card3 = el('div', { className: 'card' });
  card3.appendChild(el('h2', { textContent: 'Privacy & trust', style: 'font-size:1.05rem;margin:0 0 1rem;' }));
  card3.appendChild(el('p', { className: 'muted', textContent: 'Longform does not send any request to any server other than the relays you configure. No analytics, no telemetry, no cookies. Your posts, profile, and relay list live on relays.' }));
  wrap.appendChild(card3);

  const card4 = el('div', { className: 'card' });
  card4.appendChild(el('h2', { textContent: 'About this build', style: 'font-size:1.05rem;margin:0 0 .5rem;' }));
  card4.appendChild(el('p', { className: 'muted', style: 'font-size:.9rem;', textContent: 'Longform does not verify event signatures on inbound events (small-file trade-off). A malicious relay could in principle serve fabricated events. Longform trusts the relays you explicitly choose.' }));
  wrap.appendChild(card4);

  return wrap;
}

function renderProfileView(npub) {
  let pubkey;
  try { pubkey = npubDecode(npub); } catch (_) { pubkey = null; }
  if (!pubkey) {
    return el('div', { className: 'empty' }, [el('p', { textContent: 'Invalid profile link.' })]);
  }
  const profile = state.profiles.get(pubkey);
  if (!profile) {
    relayManager.subscribe([{ kinds: [0], authors: [pubkey], limit: 1 }], (ev) => handleProfileEvent(ev));
    relayManager.subscribe([{ kinds: [30023], authors: [pubkey], limit: 20 }], (ev) => handlePostEvent(ev));
  }
  const wrap = el('div');
  const card = el('div', { className: 'card' }, [
    el('div', { className: 'row', style: 'gap:1rem;align-items:flex-start;' }, [
      renderAvatar(pubkey, 64),
      el('div', { className: 'flex-1' }, [
        el('h1', { style: 'font-size:1.4rem;margin:0 0 .25rem;', textContent: profile ? profile.name : pubkey.slice(0, 12) + '…' }),
        el('p', { className: 'muted', style: 'font-family:var(--mono);font-size:.8rem;word-break:break-all;', textContent: npub }),
        profile && profile.about ? el('p', { className: 'mt-1', textContent: profile.about }) : null,
        profile && profile.nip05 ? el('p', { className: 'muted', style: 'font-size:.85rem;', textContent: profile.nip05 }) : null,
      ]),
    ]),
  ]);
  wrap.appendChild(card);

  const postIds = [];
  for (const [addr, id] of state.feedAddresses) {
    const post = state.posts.get(id);
    if (post && post.pubkey === pubkey) postIds.push(post);
  }
  postIds.sort((a, b) => b.created_at - a.created_at);
  if (postIds.length > 0) {
    const list = el('div', { className: 'card', style: 'padding:0 1.25rem;' });
    for (const post of postIds) list.appendChild(renderFeedItem(post));
    wrap.appendChild(list);
  } else {
    wrap.appendChild(el('div', { className: 'empty' }, [el('p', { textContent: 'No posts found.' })]));
  }
  return wrap;
}

function renderNoteStub(note) {
  return el('div', { className: 'card' }, [
    el('h2', { textContent: 'Note view' }),
    el('p', { className: 'muted', textContent: 'Short text notes (kind 1) are not rendered as blogs. Open the raw event:' }),
    el('p', {}, [el('code', { style: 'word-break:break-all;', textContent: note })]),
  ]);
}

function renderNotFoundView(path) {
  return el('div', { className: 'empty' }, [
    el('h2', { textContent: 'Page not found' }),
    el('p', { textContent: 'No view for “' + path + '”.' }),
    el('button', { className: 'btn btn-primary', textContent: 'Go to feed', onclick: () => navigate({ name: 'feed' }) }),
  ]);
}

function routeView(route) {
  switch (route.name) {
    case 'feed': return renderFeedView();
    case 'post': return renderPostView(route.naddr);
    case 'compose': return renderComposeView(null);
    case 'edit': return renderEditView(route.naddr);
    case 'settings': return renderSettingsView();
    case 'relays': return renderRelaysView();
    case 'profile': return renderProfileView(route.npub);
    case 'note': return renderNoteStub(route.note);
    case 'not-found':
    default: return renderNotFoundView(route.path || '');
  }
}

// ============================================================
// DATA HANDLERS
// ============================================================
function handleProfileEvent(ev) {
  if (!isValidEvent(ev) || ev.kind !== 0) return;
  const profile = parseProfile(ev);
  if (!profile) return;
  state.profiles.set(ev.pubkey, profile);
  notifyStateChange();
}

function handlePostEvent(ev) {
  if (!isValidEvent(ev) || ev.kind !== 30023) return;
  const post = parsePost(ev);
  if (!post) { state.invalidPostCount++; return; }
  const key = post.pubkey + ':' + post.d;
  const existingId = state.feedAddresses.get(key);
  if (existingId) {
    const existing = state.posts.get(existingId);
    if (existing && existing.created_at >= post.created_at) {
      return;
    }
  }
  state.posts.set(post.id, post);
  state.feedAddresses.set(key, post.id);
  notifyStateChange();
}

function handleCommentEvent(ev, addr) {
  if (!isValidEvent(ev) || ev.kind !== 1111) return;
  const comment = parseComment(ev);
  if (!comment) return;
  if (!state.comments.has(addr)) state.comments.set(addr, new Map());
  if (state.comments.get(addr).has(comment.id)) return;
  state.comments.get(addr).set(comment.id, comment);
  notifyStateChange();
}

// ============================================================
// FEED LOADING
// ============================================================
let feedLoaded = false;
function loadFeed() {
  if (feedLoaded || !state.user || state.follows.size === 0) return;
  feedLoaded = true;
  const authors = Array.from(state.follows);
  for (let i = 0; i < authors.length; i += 100) {
    const chunk = authors.slice(i, i + 100);
    relayManager.subscribe(
      [{ kinds: [0], authors: chunk, limit: 100 }],
      (ev) => handleProfileEvent(ev)
    );
  }
  relayManager.subscribe(
    [{ kinds: [30023], authors, limit: CONFIG.feedLimit }],
    (ev) => handlePostEvent(ev),
    () => {}
  );
}

// ============================================================
// COPY
// ============================================================
async function copyText(text) {
  try {
    if (navigator.clipboard && navigator.clipboard.writeText) {
      await navigator.clipboard.writeText(text);
      showToast('Copied');
    } else {
      const ta = document.createElement('textarea');
      ta.value = text;
      ta.style.position = 'fixed';
      ta.style.opacity = '0';
      document.body.appendChild(ta);
      ta.select();
      try { document.execCommand('copy'); showToast('Copied'); }
      catch (_) { showToast('Copy failed', 'error'); }
      document.body.removeChild(ta);
    }
  } catch (e) {
    safeLog('error', 'copy', { error: String(e) });
    showToast('Copy failed', 'error');
  }
}

// ============================================================
// MODALS
// ============================================================
function showSignInHelp() {
  const backdrop = el('div', { className: 'modal-backdrop', role: 'dialog', 'aria-modal': 'true' });
  const close = () => {
    if (backdrop.parentNode) backdrop.parentNode.removeChild(backdrop);
    document.removeEventListener('keydown', escHandler);
  };
  backdrop.addEventListener('click', (e) => { if (e.target === backdrop) close(); });
  const escHandler = (e) => { if (e.key === 'Escape') close(); };
  document.addEventListener('keydown', escHandler);

  const diag = signerDiagnostic();
  const modal = el('div', { className: 'modal' }, [
    el('h2', { textContent: 'Sign in with a NIP-07 signer' }),
    el('p', { textContent: 'Longform never sees your private key. Sign in with a browser extension that implements NIP-07.' }),
    el('div', { className: 'mt-1', style: 'background:var(--bg-soft);padding:.75rem;border-radius:var(--radius);font-size:.82rem;' }, [
      el('p', { style: 'margin:0 0 .25rem;font-weight:600;', textContent: 'Current status:' }),
      el('ul', { style: 'margin:0;padding-left:1.25rem;' }, [
        el('li', { textContent: 'window.nostr: ' + (diag.hasNostrObj ? '✓ present' : '✗ missing') }),
        el('li', { textContent: 'getPublicKey: ' + (diag.hasGetPublicKey ? '✓ present' : '✗ missing') }),
        el('li', { textContent: 'signEvent: ' + (diag.hasSignEvent ? '✓ present' : '✗ missing') }),
      ]),
    ]),
    el('p', { className: 'mt-2', textContent: 'Install a NIP-07 signer for desktop browsers:' }),
    el('ul', {}, [
      el('li', {}, [el('a', { href: 'https://getalby.com', target: '_blank', rel: 'noopener noreferrer', textContent: 'Alby' }), document.createTextNode(' — browser extension')]),
      el('li', {}, [el('a', { href: 'https://github.com/fiatjaf/nos2x', target: '_blank', rel: 'noopener noreferrer', textContent: 'nos2x' }), document.createTextNode(' — minimal NIP-07 signer')]),
    ]),
    el('p', { className: 'muted mt-2', style: 'font-size:.85rem;', textContent: 'After installing, click "Check again". On mobile, use a NIP-46 remote signer app.' }),
    el('div', { className: 'modal-actions' }, [
      el('button', { className: 'btn btn-secondary', textContent: 'Close', onclick: close }),
      el('button', {
        className: 'btn btn-primary',
        textContent: 'Check again',
        onclick: async () => {
          const found = await waitForSigner(1500);
          close();
          if (found) {
            state.phase = 'boot';
            boot();
          } else {
            showToast('Still no signer detected. Make sure the extension is enabled for this site, then reload.', 'error');
          }
        },
      }),
      el('button', { className: 'btn btn-secondary', textContent: 'Reload page', onclick: () => window.location.reload() }),
    ]),
  ]);
  backdrop.appendChild(modal);
  document.body.appendChild(backdrop);
  const firstBtn = modal.querySelector('button');
  if (firstBtn) firstBtn.focus();
}

// ============================================================
// RENDER ENTRY (single shell — no double wrap)
// ============================================================
function render() {
  const app = document.getElementById('app');
  if (!app) return;

  const savedFields = new Map();
  document.querySelectorAll('[data-persist-id]').forEach((input) => {
    const id = input.getAttribute('data-persist-id');
    if ('value' in input) savedFields.set(id, input.value);
    if (input.type === 'checkbox') savedFields.set(id + ':checked', input.checked);
  });
  const scrollY = window.scrollY;

  let viewEl;
  try {
    if (state.phase === 'fatal') {
      viewEl = renderFatalView();
    } else if (state.phase === 'connecting') {
      viewEl = renderConnectingView();
    } else if (state.phase === 'no-signer') {
      if (state.route.name === 'post' || state.route.name === 'profile' || state.route.name === 'note') {
        viewEl = routeView(state.route);
      } else {
        viewEl = renderNoSignerView();
      }
    } else {
      viewEl = routeView(state.route);
    }
  } catch (e) {
    safeLog('error', 'renderView', { error: String(e) });
    viewEl = renderFatalInline(e);
  }

  const wrapper = el('div', { className: 'app-shell' }, [
    renderHeader(),
    el('main', { className: 'container' }, [viewEl]),
    renderFooter(),
    renderBottomNav(),
  ]);

  clearNode(app);
  app.appendChild(wrapper);
  updateActiveNav();

  document.querySelectorAll('[data-persist-id]').forEach((input) => {
    const id = input.getAttribute('data-persist-id');
    if (savedFields.has(id) && 'value' in input) {
      try { input.value = savedFields.get(id); } catch (_) {}
    }
    if (savedFields.has(id + ':checked') && input.type === 'checkbox') {
      input.checked = savedFields.get(id + ':checked');
    }
  });
  window.scrollTo(0, scrollY);
}

// ============================================================
// BOOT
// ============================================================
async function boot() {
  loadSettings();
  applyTheme();
  if (window.matchMedia) {
    const mq = window.matchMedia('(prefers-color-scheme: dark)');
    if (mq.addEventListener) mq.addEventListener('change', () => { if (state.settings.theme === 'system') applyTheme(); });
  }

  state.route = parseRoute();
  if (state.relays.size === 0) {
    for (const url of CONFIG.defaultRelays) setRelay(url, true, true);
  }

  state.phase = 'connecting';
  requestRender();

  // Poll for signer (extensions may inject at document_idle)
  const found = await waitForSigner(CONFIG.signerPollTimeoutMs);

  if (!found) {
    state.phase = 'no-signer';
    applyRelayConfig();
    requestRender();
    startSignerWatch();
    return;
  }

  try {
    const pubkey = await window.nostr.getPublicKey();
    if (!isHex64(pubkey)) throw new Error('signer returned invalid pubkey');
    state.user = { pubkey };
  } catch (e) {
    safeLog('error', 'boot:getPubkey', { error: String(e) });
    state.phase = 'no-signer';
    applyRelayConfig();
    requestRender();
    // Don't auto-retry if signer exists but user denied — wait for manual retry
    startSignerWatch();
    return;
  }

  stopSignerWatch();
  applyRelayConfig();

  try {
    relayManager.subscribe([{ kinds: [0], authors: [state.user.pubkey], limit: 1 }], (ev) => handleProfileEvent(ev));
    const contactEvent = await fetchContactList(state.user.pubkey);
    if (contactEvent) {
      const parsed = parseContactList(contactEvent);
      if (parsed && parsed.follows.length > 0) {
        for (const pk of parsed.follows) state.follows.add(pk);
      }
    }
    const relayEvent = await fetchRelayList(state.user.pubkey);
    if (relayEvent) {
      const parsed = parseRelayList(relayEvent);
      if (parsed) {
        const curWrite = (url) => !!state.relays.get(url)?.write;
        const curRead = (url) => !!state.relays.get(url)?.read;
        for (const url of parsed.read) setRelay(url, true, curWrite(url));
        for (const url of parsed.write) setRelay(url, curRead(url), true);
        applyRelayConfig();
      }
    }
    loadFeed();
  } catch (e) {
    safeLog('error', 'boot:data', { error: String(e) });
  }

  state.phase = 'ready';
  requestRender();
}

// ============================================================
// HASH ROUTE CHANGE
// ============================================================
window.addEventListener('hashchange', () => {
  state.route = parseRoute();
  requestRender();
});

// ============================================================
// GLOBAL ERROR HANDLING
// ============================================================
window.addEventListener('error', (e) => {
  safeLog('error', 'global', { message: e.message, filename: e.filename });
});
window.addEventListener('unhandledrejection', (e) => {
  safeLog('error', 'unhandledPromise', { reason: String(e.reason) });
});

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

})();
</script>
</body>
</html>