Themes: accent colours and AMOLED black per person

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

public/themes.js

@@ -0,0 +1,32 @@
+'use strict';
+// ---- Themes: each person picks an accent colour and Auto, Light, Dark or AMOLED black (true black, easy on phone batteries). Kept in their synced settings, so it follows them between devices.
+const THEME_ACCENTS = [['blue', 'Blue', '#3d6bf0', '#6a8cff'], ['teal', 'Teal', '#0f8f8a', '#3cc7c0'], ['green', 'Green', '#2f9e6e', '#4cc98d'], ['orange', 'Orange', '#d9741a', '#f09a45'], ['red', 'Red', '#d4392f', '#ff6b60'], ['pink', 'Pink', '#c9407d', '#f26aa4'], ['purple', 'Purple', '#7b4fe0', '#a688ff']];
+const THEME_MODES = [['auto', 'Auto'], ['light', 'Light'], ['dark', 'Dark'], ['amoled', 'AMOLED']];
+const THEME_VARS = {
+  light: { '--bg': '#f5f6f8', '--panel': '#fff', '--panel2': '#eef0f4', '--text': '#14171c', '--muted': '#6a7280', '--line': '#e0e3e9' },
+  dark: { '--bg': '#0f1115', '--panel': '#181b21', '--panel2': '#20242c', '--text': '#eceef2', '--muted': '#8b93a3', '--line': '#272c35' },
+  amoled: { '--bg': '#000', '--panel': '#0b0b0d', '--panel2': '#16171b', '--text': '#eceef2', '--muted': '#8b93a3', '--line': '#1f2127' },
+};
+function themeApply() {
+  const root = document.documentElement, mode = store.get('theme_mode', 'auto'), acc = THEME_ACCENTS.find(a => a[0] === store.get('theme_accent', 'blue')) || THEME_ACCENTS[0];
+  const dark = mode === 'dark' || mode === 'amoled' || (mode === 'auto' && matchMedia('(prefers-color-scheme: dark)').matches);
+  for (const k of Object.keys(THEME_VARS.light)) { if (mode === 'auto') root.style.removeProperty(k); else root.style.setProperty(k, THEME_VARS[mode][k]); }
+  const hex = dark ? acc[3] : acc[2];
+  if (acc[0] === 'blue' && mode === 'auto') { root.style.removeProperty('--accent'); root.style.removeProperty('--accent-t'); }
+  else { const n = parseInt(hex.slice(1), 16), lum = (0.299 * (n >> 16) + 0.587 * ((n >> 8) & 255) + 0.114 * (n & 255)) / 255; root.style.setProperty('--accent', hex); root.style.setProperty('--accent-t', lum > .6 ? '#0b1020' : '#fff'); }
+  root.style.colorScheme = mode === 'auto' ? '' : dark ? 'dark' : 'light';
+  const m = document.querySelector('meta[name=theme-color]'); if (m) m.content = dark ? (mode === 'amoled' ? '#000000' : '#0f1115') : (mode === 'light' ? '#f5f6f8' : m.content);
+}
+function themeStart() { themeApply(); try { matchMedia('(prefers-color-scheme: dark)').addEventListener('change', themeApply); } catch {} }
+function themeSettings(el) {
+  if (!el) return;
+  const draw = () => {
+    const mode = store.get('theme_mode', 'auto'), acc = store.get('theme_accent', 'blue');
+    el.innerHTML = `<h2>Look</h2><p class="sub">Saved for you and used on every device you sign in on.</p>
+      <div class="seg" role="radiogroup" aria-label="Brightness">${THEME_MODES.map(([k, l]) => `<a href="#" role="radio" aria-checked="${mode === k}" data-m="${k}" class="${mode === k ? 'on' : ''}">${l}</a>`).join('')}</div>
+      <div class="swatches" role="radiogroup" aria-label="Accent colour">${THEME_ACCENTS.map(([k, l, c]) => `<button type="button" role="radio" aria-checked="${acc === k}" aria-label="${l}" title="${l}" data-a="${k}" class="${acc === k ? 'on' : ''}" style="background:${c}"></button>`).join('')}</div>`;
+    el.querySelectorAll('[data-m]').forEach(a => a.onclick = e => { e.preventDefault(); store.set('theme_mode', a.dataset.m); themeApply(); draw(); });
+    el.querySelectorAll('[data-a]').forEach(b => b.onclick = () => { store.set('theme_accent', b.dataset.a); themeApply(); draw(); });
+  };
+  draw();
+}