A face tapped in the feed opens that person's profile at its top; Back returns to the same place in the feed.

The profile kept the feed's scroll offset, so the reader landed deep in
the person's posts — which read as a thread opening.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Du1qT1wbkYwYK6zkGH79Rp

2 files changed, 87 insertions, 0 deletions

diff --git a/src/features/messages.js b/src/features/messages.js
index 701b131..dd31f46 100644
--- a/src/features/messages.js
+++ b/src/features/messages.js
@@ -3021,7 +3021,20 @@ export function messagesFeature(ctx) {
     }
   }
 
+  // A profile opens at its top: keeping the feed's scroll offset landed the
+  // reader deep in that person's posts, which read as a thread. Back (a
+  // popstate) puts them where they were on the page they left.
+  const profReturn = []; // [{ pk, y }] per profile opened, newest last
+  window.addEventListener('popstate', () => {
+    const top = profReturn[profReturn.length - 1];
+    if (!top || ui.profilePk === top.pk) return;
+    profReturn.pop();
+    requestAnimationFrame(() => { try { window.scrollTo(0, top.y); } catch {} });
+  });
   function openProfile(pk) {
+    let y = 0; try { y = window.scrollY || 0; } catch {}
+    if (ui.profilePk !== pk) profReturn.push({ pk, y });
+    if (profReturn.length > 20) profReturn.shift();
     ui.profilePk = pk;
     // Opened from inside a thread (an author's avatar/name), the profile
     // stacks ON TOP of it — back returns to the conversation. The screen
@@ -3030,6 +3043,7 @@ export function messagesFeature(ctx) {
     ui.profOverThread = !!ui.noteThread;
     ui.profEdit = null; ui.profEditFilled = false; ui.logoutConfirm = null; ui.profCompose = null;
     render();
+    try { window.scrollTo(0, 0); } catch {}
     fetchFullProfile(pk);
     notesFor(pk);
   }
diff --git a/tools/avatar-profile-test.js b/tools/avatar-profile-test.js
new file mode 100644
index 0000000..c91ad26
--- /dev/null
+++ b/tools/avatar-profile-test.js
@@ -0,0 +1,73 @@
+// Tapping a face in the feed opens that person's profile AT ITS TOP — not
+// the thread the row would open, and not the profile scrolled down to
+// wherever the reader was in the feed. Back returns to the same place.
+//
+// Run: bun tools/avatar-profile-test.js
+import puppeteer from 'puppeteer-core';
+import { generateMnemonic } from '@scure/bip39';
+import { wordlist } from '@scure/bip39/wordlists/english';
+import { cacheKeyFor } from '../src/wallet.js';
+import { buildHtml } from '../build.js';
+const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
+let ok = true;
+const check = (n, c, d = '') => { console.log(` ${c ? '✓' : '✗'} ${n}${d ? ' — ' + d : ''}`); if (!c) ok = false; };
+
+const html = await buildHtml({ minify: true, pwa: false });
+const server = Bun.serve({ port: 5271, fetch: () => new Response(html, { headers: { 'content-type': 'text/html' } }) });
+const browser = await puppeteer.launch({ executablePath: '/usr/bin/google-chrome', headless: 'new', args: ['--no-sandbox'] });
+const page = await browser.newPage();
+const click = (t) => page.evaluate((x) => { const e = [...document.querySelectorAll('button')].find((n) => n.textContent.trim().toLowerCase().includes(x)); if (e) { e.click(); return true; } return false; }, t);
+const waitText = async (x, ms = 25000) => { for (let i = 0; i < ms / 250; i++) { if ((await page.evaluate(() => document.body.innerText)).toLowerCase().includes(x)) return true; await sleep(250); } return false; };
+try {
+  await page.setViewport({ width: 390, height: 844 });
+  await page.goto('http://localhost:5271/', { waitUntil: 'domcontentloaded' });
+  await page.evaluate(() => localStorage.setItem('btc-wallet-network', 'regtest'));
+  await page.reload({ waitUntil: 'domcontentloaded' });
+  await sleep(400);
+  await click('create a new wallet'); await sleep(600);
+  await page.waitForSelector('.words .w .t');
+  const mn = (await page.$$eval('.words .w .t', (l) => l.map((e) => e.textContent.trim()))).join(' ');
+  await click('skip verification');
+  await waitText('receive', 20000);
+  const base = cacheKeyFor(mn + '\n');
+  const A = 'a'.repeat(63) + '9', B = 'b'.repeat(63) + '7';
+  await page.evaluate(([k, a, b]) => {
+    const now = Math.floor(Date.now() / 1000);
+    const ns = Array.from({ length: 30 }, (_, i) => ({
+      id: (i + 16).toString(16).padStart(64, 'c'), pubkey: i % 2 ? b : a, kind: 1, created_at: now - i * 60,
+      content: 'post number ' + i + '\n\n' + 'a few lines so rows have height. '.repeat(4), tags: [],
+    }));
+    localStorage.setItem(k + ':follows', JSON.stringify({ tags: [['p', a], ['p', b]], c: '', at: now }));
+    localStorage.setItem(k + ':feedNotes', JSON.stringify(ns));
+    localStorage.setItem(k + ':profiles', JSON.stringify({ [a]: { name: 'Alice Poster', t: Date.now() }, [b]: { name: 'Bob Poster', about: 'bob bio here', t: Date.now() } }));
+  }, [base, A, B]);
+  await page.reload({ waitUntil: 'domcontentloaded' });
+  await waitText('receive', 20000);
+  await page.evaluate(() => document.querySelector('.app-bottom-nav .app-nav-button').click());
+  await waitText('post number 15', 15000);
+  await sleep(1500);
+
+  // scroll down to a row well into the feed, then tap its face
+  await page.evaluate(() => { const r = [...document.querySelectorAll('.notes-feed .note-avatar')].find((n) => n.closest('[data-key]')?.innerText.includes('post number 13')); r.scrollIntoView({ block: 'center' }); });
+  await sleep(700);
+  const feedY = await page.evaluate(() => window.scrollY);
+  const pt = await page.evaluate(() => { const r = [...document.querySelectorAll('.notes-feed .note-avatar')].find((n) => n.closest('[data-key]')?.innerText.includes('post number 13')).getBoundingClientRect(); return { x: r.x + r.width / 2, y: r.y + r.height / 2 }; });
+  await page.touchscreen.tap(pt.x, pt.y);
+  await sleep(1200);
+  const after = await page.evaluate(() => ({ y: window.scrollY, text: document.body.innerText.slice(0, 400), thread: !!document.querySelector('.note-thread, .thread-page') }));
+  if (process.env.DBG) console.log(feedY, JSON.stringify(after));
+  check('the tap opens the profile', /Bob Poster/.test(after.text) && /bob bio here/.test(after.text), after.text.replace(/\s+/g, ' ').slice(0, 80));
+  check('...at its top', after.y < 5, 'scrollY ' + after.y + ' (feed was at ' + feedY + ')');
+
+  await page.goBack().catch(() => {});
+  await sleep(1200);
+  let back = await page.evaluate(() => ({ y: window.scrollY, feed: !!document.querySelector('.notes-feed') && document.body.innerText.includes('post number 13') }));
+  if (!back.feed) {
+    await page.evaluate(() => { const b = document.querySelector('.back, [aria-label="Back"]'); if (b) b.click(); });
+    await sleep(1200);
+    back = await page.evaluate(() => ({ y: window.scrollY, feed: !!document.querySelector('.notes-feed') }));
+  }
+  check('back returns to the feed where the reader was', back.feed && Math.abs(back.y - feedY) < 60, 'scrollY ' + back.y + ' vs ' + feedY);
+} finally { await browser.close(); server.stop(true); }
+console.log(ok ? '\n✅ a face opens its profile at the top' : '\n❌ failed');
+process.exit(ok ? 0 : 1);