eleven / ocho Public

web: in-app colour themes + light/dark (#26)

* web: in-app colour themes + light/dark

Adds a Theme picker (kebab → Theme) with five colour directions — Lit Room
(default), Lagoon, Sunny, Linen, and Classic (the original blue) — plus a
Light / System / Dark appearance toggle. The choice is a local preference
(localStorage) only; nothing about it ever reaches the server.

- style.css: rework :root into per-theme [data-theme] blocks with every
  colour as light-dark(LIGHT, DARK); the appearance sets color-scheme on
  <html> ("light dark" = follow the OS). Variabilised the remaining hardcoded
  colours (status pills, danger/warn, shadows, code/reaction tints, me-bubble
  ink) so dark mode is correct everywhere. New --sidebar + --font-display.
- ui.js: pure THEMES/APPEARANCES + normalizeTheme/normalizeAppearance/
  colorScheme helpers (single source of truth) + unit tests.
- chat.js: applyTheme/setTheme/setAppearance + THEME_META; the picker sheet;
  re-tints the status bar if the OS flips light/dark while on "system".
- index/join/admin <head>: a tiny pre-paint script applies the saved theme
  before first paint (no flash). It mirrors ui.js — keep the two in sync.

Default theme is Lit Room. To keep Classic as the default, change
DEFAULT_THEME in ui.js and the fallback in the three <head> scripts.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* web: add Plum theme, grey the Classic sidebar, rename picker label to "Scheme"

- Six themes now (adds Plum, a soft grape) so the picker grid is balanced 2×3.
- Classic light mode gets a slightly grey sidebar (was pure white, same as panel).
- Picker section label "Colour" → "Scheme".

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* web: default to the Classic theme

Themes are opt-in: keep the original blue as the out-of-the-box look so
existing instances don't change appearance unprompted. The other five
(Lit Room, Lagoon, Sunny, Plum, Linen) are one tap away in the picker.

Flips DEFAULT_THEME in ui.js and the pre-paint <head> fallbacks.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* web: fix theme contrast to WCAG AA (all 6 themes, light + dark)

Audited every theme with WCAG contrast ratios and fixed the failures —
all concentrated in light mode:

- Muted text (timestamps, chat-list previews, names, subtitles) was
  2.4–3.8:1 in every theme; darkened each theme's light --muted to ≥4.7.
- "Your bubble" (white on the me-colour) failed in Classic/Lagoon/Sunny/
  Plum/Linen (Sunny worst at 2.8); deepened the light me-bubble to ≥4.6.
  Also fixed Classic's dark me-bubble (was 4.2).
- Button labels (white on accent) failed Lagoon (2.6) and Linen (3.1);
  deepened those light accents.
- Added a --link token: a darkened accent for accent-coloured *text*
  (the "N replies" tag, link-style buttons, reply/swipe glyphs) so bright
  warm accents (Lit Room honey, Sunny yellow) stay vivid as fills but are
  legible as text. Wired reply-count, linkish, picker-action, reply-bar
  and swipe icons, and the drop-overlay label to it.

Every theme now passes AA (>=4.5) for body text, bubble text, muted text,
buttons and links in both light and dark. Dark mode already passed and is
unchanged apart from Classic's me-bubble.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* web: clearer selected-chat state + lighter Classic sidebar

The grey Classic sidebar was nearly identical to the row highlight
(--bubble-them), so the selected chat vanished into it, and the grey read
as too heavy.

- Lighten Classic's light-mode sidebar (#eef0f5 -> #f4f6fb).
- Split thread-row hover vs active: the selected chat keeps the neutral
  highlight and gains an accent bar down its left edge, drawn with --link
  (the contrast-safe accent) so it's clearly visible in every theme and in
  both light/dark — without tinting the row text (an accent-tinted fill
  pushed the muted preview below AA).
- Nudge Lit Room's muted darker (#776a5e -> #736657) so preview text still
  clears AA on the row-highlight background too.

All themes still pass AA across both modes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* web: selected chat = a darker row background (drop the accent bar)

Replace the left-edge accent bar (which curved with the row's radius) with
a simple darker background for the active row, via a new --row-active token
(defaults to the hover grey; Classic overrides it to a clearly darker grey).
Classic's --muted is deepened a touch so the preview text still clears AA
on the darker selected row.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* web: tune Classic — lighter sidebar, darker selected row

Lighten the light-mode sidebar (#f4f6fb -> #f8f9fc) and deepen the active
row (#e3e7f1 -> #d9dfec) for a clearer selection. --muted nudged to #5a6170
so the preview text still clears AA on the darker selected row.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Paul Campbell 4 months ago 06459d2cc5354741d11c9d16d53b7300a5c5f40a parent 6429a70

7 files changed, +429 −43

test/ui.test.mjs +37 −1
web/pages/admin.html +16 −0
web/pages/index.html +27 −0
web/pages/join.html +24 −0
web/static/chat.js +131 −1
web/static/style.css +168 −41
web/static/ui.js +26 −0

diff --git a/test/ui.test.mjs b/test/ui.test.mjs

index 6e1bfac..00114a8 100644

--- a/test/ui.test.mjs

+++ b/test/ui.test.mjs

@@ -1,6 +1,17 @@

// Tests for composer key handling. node test/ui.test.mjs

import assert from "node:assert/strict";

-import { shouldSend, fileExt, fileAllowed, fileMime, fileIcon } from "../web/static/ui.js";

+import {

+ shouldSend,

+ fileExt,

+ fileAllowed,

+ fileMime,

+ fileIcon,

+ normalizeTheme,

+ normalizeAppearance,

+ colorScheme,

+ DEFAULT_THEME,

+ DEFAULT_APPEARANCE,

+} from "../web/static/ui.js";

let failures = 0;

async function test(name, fn) {

@@ -66,5 +77,30 @@ await test("fileIcon: mapped emoji, 📎 fallback", () => {

assert.equal(fileIcon("d.unknown"), "📎");

});

+await test("normalizeTheme: valid passes through, junk falls back", () => {

+ for (const ok of ["litroom", "lagoon", "sunny", "plum", "linen", "classic"]) {

+ assert.equal(normalizeTheme(ok), ok);

+ }

+ assert.equal(normalizeTheme("neon"), DEFAULT_THEME);

+ assert.equal(normalizeTheme(null), DEFAULT_THEME);

+ assert.equal(normalizeTheme(undefined), DEFAULT_THEME);

+ assert.equal(normalizeTheme(""), DEFAULT_THEME);

+});

+await test("normalizeAppearance: valid passes through, junk falls back", () => {

+ for (const ok of ["light", "dark", "system"]) {

+ assert.equal(normalizeAppearance(ok), ok);

+ }

+ assert.equal(normalizeAppearance("sepia"), DEFAULT_APPEARANCE);

+ assert.equal(normalizeAppearance(null), DEFAULT_APPEARANCE);

+});

+await test("colorScheme: system maps to 'light dark' so light-dark() follows the OS", () => {

+ assert.equal(colorScheme("light"), "light");

+ assert.equal(colorScheme("dark"), "dark");

+ assert.equal(colorScheme("system"), "light dark");

+ assert.equal(colorScheme("anything-else"), "light dark");

+});

console.log(failures === 0 ? "\nALL PASSED" : `\n${failures} FAILED`);

process.exit(failures === 0 ? 0 : 1);

diff --git a/web/pages/admin.html b/web/pages/admin.html

index 0bd2680..6ad8fec 100644

--- a/web/pages/admin.html

+++ b/web/pages/admin.html

@@ -3,6 +3,22 @@

<title>lchat · admin</title>

+<!-- Apply the saved theme before first paint (see web/static/ui.js — the canonical

+ list; this copy must stay in sync). A local preference, never sent to the server. -->

+<script>

+ (function () {

+ try {

+ var THEMES = ["litroom", "lagoon", "sunny", "plum", "linen", "classic"];

+ var t = localStorage.getItem("lchat_theme");

+ if (THEMES.indexOf(t) < 0) t = "classic";

+ var a = localStorage.getItem("lchat_appearance");

+ var root = document.documentElement;

+ root.dataset.theme = t;

+ root.style.colorScheme = a === "light" ? "light" : a === "dark" ? "dark" : "light dark";

+ } catch (e) {}

+ })();

+</script>

<h1>lchat admin</h1>

<p class="sub">Create secret invite links. Each one lets someone pick a screen name and join the chat.</p>

diff --git a/web/pages/index.html b/web/pages/index.html

index 9ef6ebc..2eb431d 100644

--- a/web/pages/index.html

+++ b/web/pages/index.html

@@ -10,6 +10,32 @@

+<!-- Apply the saved theme + appearance before first paint (no flash of the

+ default). The canonical list + defaults live in web/static/ui.js; this small

+ copy must stay in sync. The choice is a local preference only — it is never

+ sent to the server. -->

+<script>

+ (function () {

+ try {

+ var THEMES = ["litroom", "lagoon", "sunny", "plum", "linen", "classic"];

+ var PANEL = {

+ litroom: ["#fff8f0", "#241a1e"], lagoon: ["#f3fbfa", "#0c2a29"],

+ sunny: ["#fffaf0", "#241d12"], plum: ["#fdf8fd", "#221829"],

+ linen: ["#f5f1ea", "#211f1b"], classic: ["#ffffff", "#1d2026"],

+ };

+ var t = localStorage.getItem("lchat_theme");

+ if (THEMES.indexOf(t) < 0) t = "classic";

+ var a = localStorage.getItem("lchat_appearance");

+ var root = document.documentElement;

+ root.dataset.theme = t;

+ root.style.colorScheme = a === "light" ? "light" : a === "dark" ? "dark" : "light dark";

+ var dark = a === "dark" || (a !== "light" && matchMedia("(prefers-color-scheme: dark)").matches);

+ var m = document.querySelector('meta[name="theme-color"]');

+ if (m) m.setAttribute("content", PANEL[t][dark ? 1 : 0]);

+ } catch (e) {}

+ })();

+</script>

@@ -29,6 +55,7 @@

<button class="menu-item" id="menu-notif" role="menuitem">Notifications</button>

+ <button class="menu-item" id="menu-theme" role="menuitem">Theme</button>

<button class="menu-item" id="menu-add-device" role="menuitem">Add a device</button>

<button class="menu-item" id="menu-rename" role="menuitem">Edit profile</button>

<button class="menu-item danger" id="menu-leave" role="menuitem">Leave</button>

diff --git a/web/pages/join.html b/web/pages/join.html

index f5dc36a..45c1f4c 100644

--- a/web/pages/join.html

+++ b/web/pages/join.html

@@ -11,6 +11,30 @@

+<!-- Apply the saved theme before first paint (see web/static/ui.js — the canonical

+ list; this copy must stay in sync). A local preference, never sent to the server. -->

+<script>

+ (function () {

+ try {

+ var THEMES = ["litroom", "lagoon", "sunny", "plum", "linen", "classic"];

+ var PANEL = {

+ litroom: ["#fff8f0", "#241a1e"], lagoon: ["#f3fbfa", "#0c2a29"],

+ sunny: ["#fffaf0", "#241d12"], plum: ["#fdf8fd", "#221829"],

+ linen: ["#f5f1ea", "#211f1b"], classic: ["#ffffff", "#1d2026"],

+ };

+ var t = localStorage.getItem("lchat_theme");

+ if (THEMES.indexOf(t) < 0) t = "classic";

+ var a = localStorage.getItem("lchat_appearance");

+ var root = document.documentElement;

+ root.dataset.theme = t;

+ root.style.colorScheme = a === "light" ? "light" : a === "dark" ? "dark" : "light dark";

+ var dark = a === "dark" || (a !== "light" && matchMedia("(prefers-color-scheme: dark)").matches);

+ var m = document.querySelector('meta[name="theme-color"]');

+ if (m) m.setAttribute("content", PANEL[t][dark ? 1 : 0]);

+ } catch (e) {}

+ })();

+</script>

<h1>Loading…</h1>

diff --git a/web/static/chat.js b/web/static/chat.js

index 0d993ed..611a652 100644

--- a/web/static/chat.js

+++ b/web/static/chat.js

@@ -19,7 +19,15 @@ import {

randomSecret,

deriveInvite,

} from "/static/crypto.js";

-import { shouldSend, fileAllowed, fileMime, fileIcon } from "/static/ui.js";

+import {

+ shouldSend,

+ fileAllowed,

+ fileMime,

+ fileIcon,

+ normalizeTheme,

+ normalizeAppearance,

+ colorScheme,

+} from "/static/ui.js";

import { richTokens, typingSummary, replySnippet, formatBytes } from "/static/format.js";

import { emojify } from "/static/emoji.js";

import { MESSAGE_TYPE_TYPING } from "/static/message.js";

@@ -41,6 +49,127 @@ const isCoarse = matchMedia("(pointer: coarse)").matches;

const MAX_UPLOAD = 25 * 1024 * 1024; // matches maxUploadBytes (main.go)

const MAX_IMAGE_DIM = 2048; // long-edge cap; bigger images are downscaled in-browser

+// ---- themes -------------------------------------------------------------

+// The colour theme + appearance are a purely local preference (localStorage),

+// never sent to the server. Valid values + defaults live in ui.js; the palettes

+// live in style.css; a tiny copy of this list runs pre-paint in the page <head>.

+const THEME_KEY = "lchat_theme";

+const APPEARANCE_KEY = "lchat_appearance";

+// Picker swatch colour + the light/dark surface colour (the mobile status-bar

+// tint). Keep keys in sync with THEMES in ui.js.

+const THEME_META = {

+ litroom: { name: "Lit Room", disc: "#ffb23e", panel: { light: "#fff8f0", dark: "#241a1e" } },

+ lagoon: { name: "Lagoon", disc: "#16a4a0", panel: { light: "#f3fbfa", dark: "#0c2a29" } },

+ sunny: { name: "Sunny", disc: "#ffc62e", panel: { light: "#fffaf0", dark: "#241d12" } },

+ plum: { name: "Plum", disc: "#9d5cd6", panel: { light: "#fdf8fd", dark: "#221829" } },

+ linen: { name: "Linen", disc: "#7d94a8", panel: { light: "#f5f1ea", dark: "#211f1b" } },

+ classic: { name: "Classic", disc: "#5b6cff", panel: { light: "#ffffff", dark: "#1d2026" } },

+};

+const THEME_ORDER = ["litroom", "lagoon", "sunny", "plum", "linen", "classic"];

+const currentTheme = () => normalizeTheme(localStorage.getItem(THEME_KEY));

+const currentAppearance = () => normalizeAppearance(localStorage.getItem(APPEARANCE_KEY));

+// Reflect the choice onto <html>: data-theme drives the palette, color-scheme

+// drives light-dark(), and the meta tag keeps the status bar in step.

+function applyTheme(theme, appearance) {

+ const root = document.documentElement;

+ root.dataset.theme = theme;

+ root.style.colorScheme = colorScheme(appearance);

+ const dark =

+ appearance === "dark" ||

+ (appearance !== "light" && matchMedia("(prefers-color-scheme: dark)").matches);

+ const meta = document.querySelector('meta[name="theme-color"]');

+ if (meta) meta.setAttribute("content", THEME_META[theme].panel[dark ? "dark" : "light"]);

+function setTheme(theme) {

+ localStorage.setItem(THEME_KEY, theme);

+ applyTheme(theme, currentAppearance());

+function setAppearance(appearance) {

+ localStorage.setItem(APPEARANCE_KEY, appearance);

+ applyTheme(currentTheme(), appearance);

+// Re-tint the status bar when the OS flips light/dark and we're following it.

+matchMedia("(prefers-color-scheme: dark)").addEventListener("change", () => {

+ if (currentAppearance() === "system") applyTheme(currentTheme(), "system");

+});

+applyTheme(currentTheme(), currentAppearance());

+// Theme picker sheet (kebab → Theme): an appearance segmented control + a grid

+// of colour swatches. Both apply live and persist; nothing leaves the browser.

+function showThemePicker() {

+ const backdrop = modal();

+ const card = backdrop.querySelector(".sheet");

+ const h = document.createElement("h2");

+ h.textContent = "Theme";

+ card.appendChild(h);

+ const apLabel = document.createElement("label");

+ apLabel.className = "field-label";

+ apLabel.textContent = "Appearance";

+ card.appendChild(apLabel);

+ const seg = document.createElement("div");

+ seg.className = "appearance-seg";

+ const appBtns = {};

+ for (const [val, lab] of [

+ ["light", "Light"],

+ ["system", "System"],

+ ["dark", "Dark"],

+ ]) {

+ const b = document.createElement("button");

+ b.type = "button";

+ b.textContent = lab;

+ b.setAttribute("aria-pressed", String(currentAppearance() === val));

+ b.onclick = () => {

+ setAppearance(val);

+ for (const [v, el] of Object.entries(appBtns)) el.setAttribute("aria-pressed", String(v === val));

+ };

+ appBtns[val] = b;

+ seg.appendChild(b);

+ }

+ card.appendChild(seg);

+ const thLabel = document.createElement("label");

+ thLabel.className = "field-label";

+ thLabel.textContent = "Scheme";

+ thLabel.style.marginTop = "14px";

+ card.appendChild(thLabel);

+ const grid = document.createElement("div");

+ grid.className = "theme-grid";

+ const swatches = {};

+ for (const id of THEME_ORDER) {

+ const b = document.createElement("button");

+ b.type = "button";

+ b.className = "theme-swatch" + (currentTheme() === id ? " active" : "");

+ const disc = document.createElement("span");

+ disc.className = "disc";

+ disc.style.background = THEME_META[id].disc;

+ const nm = document.createElement("span");

+ nm.textContent = THEME_META[id].name;

+ b.appendChild(disc);

+ b.appendChild(nm);

+ b.onclick = () => {

+ setTheme(id);

+ for (const [v, el] of Object.entries(swatches)) el.classList.toggle("active", v === id);

+ };

+ swatches[id] = b;

+ grid.appendChild(b);

+ }

+ card.appendChild(grid);

+ const foot = document.createElement("div");

+ foot.className = "sheet-foot";

+ const done = document.createElement("button");

+ done.textContent = "Done";

+ done.onclick = () => backdrop.remove();

+ foot.appendChild(done);

+ card.appendChild(foot);

let pending = []; // attachments staged in the composer, to send with the next message

let attachSeq = 0; // local id counter for staged attachments (drives per-chip removal)

const blobURLs = {}; // blob id -> decrypted object URL (cache)

@@ -445,6 +574,7 @@ function renderApp() {

closeMenu();

fn();

});

+ wireItem("menu-theme", showThemePicker);

wireItem("menu-add-device", addDevice);

wireItem("menu-rename", editProfile);

wireItem("menu-leave", leave);

diff --git a/web/static/style.css b/web/static/style.css

index 74b2dfa..d151b30 100644

--- a/web/static/style.css

+++ b/web/static/style.css

@@ -1,15 +1,126 @@

-:root {

- --bg: #f6f7fb;

- --panel: #ffffff;

- --ink: #1c2333;

- --muted: #7a8295;

- --accent: #5b6cff;

- --accent-ink: #ffffff;

- --bubble-me: #5b6cff;

- --bubble-them: #eef0f6;

+/* ---- themes ----------------------------------------------------------------

+ Every colour is light-dark(LIGHT, DARK); the chosen appearance sets

+ `color-scheme` on <html> (light / dark / "light dark" = follow the OS), so a

+ single set of tokens drives both modes. Themes are selected with a

+ data-theme attribute on <html>. The app sets it to "classic" by default (see

+ DEFAULT_THEME in ui.js); the bare :root values below double as the Lit Room

+ theme and the no-JS fallback. Structural tokens (radius, fonts, shadow, pills,

+ status colours) live here once; theme blocks only override what differs. Order

+ matters: themes come after this block so they win on equal specificity. */

+:root,

+[data-theme="litroom"] {

--radius: 18px;

- --border: #e7e9f0;

+ --font-display: ui-rounded, "SF Pro Rounded", "Avenir Next", -apple-system, system-ui, sans-serif;

+ /* depth + status colours are theme-agnostic */

+ --shadow: light-dark(rgba(20, 30, 80, 0.10), rgba(0, 0, 0, 0.55));

+ --danger: light-dark(#c2410c, #f0936b);

+ --warn: light-dark(#b4530a, #e29457);

+ --pill-bg: light-dark(#23252e, #eef0f6);

+ --pill-ink: light-dark(#ffffff, #1c2333);

+ /* selected-chat row background; defaults to the hover grey, themes may override */

+ --row-active: var(--bubble-them);

+ /* Lit Room — warm dusk, honey glow */

+ --bg: light-dark(#efe3d6, #1b1418);

+ --panel: light-dark(#fff8f0, #241a1e);

+ --sidebar: light-dark(#fbf1e6, #1f161a);

+ --ink: light-dark(#2a211b, #f4e9dc);

+ --muted: light-dark(#736657, #b09a89);

+ --border: light-dark(#ece2d4, rgba(255, 255, 255, 0.10));

+ --accent: light-dark(#f0a93c, #ffb23e);

+ --accent-ink: light-dark(#3a2412, #2a1808);

+ --link: light-dark(#956925, #ffb23e);

+ --bubble-me: light-dark(#ffb23e, #ffb23e);

+ --bubble-me-ink: light-dark(#3a2412, #2a1808);

+ --bubble-them: light-dark(#f1ece4, #2f2329);

+/* Classic — the original lchat blue (now with a dark mode) */

+[data-theme="classic"] {

+ --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

+ --bg: light-dark(#f6f7fb, #15171c);

+ --panel: light-dark(#ffffff, #1d2026);

+ --sidebar: light-dark(#f8f9fc, #1a1d22);

+ --ink: light-dark(#1c2333, #e7e9f0);

+ --muted: light-dark(#5a6170, #9aa1b3);

+ --border: light-dark(#e7e9f0, rgba(255, 255, 255, 0.10));

+ --accent: light-dark(#5666f0, #7d8bff);

+ --accent-ink: light-dark(#ffffff, #0a0e2a);

+ --link: light-dark(#5666f0, #7d8bff);

+ --bubble-me: light-dark(#5666f0, #5666f0);

+ --bubble-me-ink: light-dark(#ffffff, #ffffff);

+ --bubble-them: light-dark(#eef0f6, #2a2e38);

+ --row-active: light-dark(#d9dfec, #2a2e38);

+/* Lagoon — cool, fresh; a coral accent that pops */

+[data-theme="lagoon"] {

+ --bg: light-dark(#d7ecea, #06201f);

+ --panel: light-dark(#f3fbfa, #0c2a29);

+ --sidebar: light-dark(#e7f6f4, #082523);

+ --ink: light-dark(#123a3a, #d8efec);

+ --muted: light-dark(#4c7271, #6fa6a3);

+ --border: light-dark(#d2e8e6, rgba(255, 255, 255, 0.10));

+ --accent: light-dark(#b85840, #ff8a6a);

+ --accent-ink: light-dark(#ffffff, #2a0f08);

+ --link: light-dark(#b2553e, #ff8a6a);

+ --bubble-me: light-dark(#0e827e, #16b3ad);

+ --bubble-me-ink: light-dark(#ffffff, #042220);

+ --bubble-them: light-dark(#ffffff, #123634);

+/* Sunny — bright-side daytime */

+[data-theme="sunny"] {

+ --bg: light-dark(#ffeecb, #1c1710);

+ --panel: light-dark(#fffaf0, #241d12);

+ --sidebar: light-dark(#fff4df, #1f190f);

+ --ink: light-dark(#3a2f1c, #f6ecd6);

+ --muted: light-dark(#796d57, #b6a079);

+ --border: light-dark(#f0e6d0, rgba(255, 255, 255, 0.10));

+ --accent: light-dark(#ffc62e, #ffc62e);

+ --accent-ink: light-dark(#3a2f1c, #2a2106);

+ --link: light-dark(#8a6b19, #ffc62e);

+ --bubble-me: light-dark(#2c7ab0, #3aa0e8);

+ --bubble-me-ink: light-dark(#ffffff, #04243a);

+ --bubble-them: light-dark(#ffffff, #2e2616);

+/* Linen — quiet, grown-up; warmth through restraint */

+[data-theme="linen"] {

+ --font-display: "Avenir Next", "Helvetica Neue", -apple-system, system-ui, sans-serif;

+ --bg: light-dark(#e7e1d6, #181714);

+ --panel: light-dark(#f5f1ea, #211f1b);

+ --sidebar: light-dark(#ece6dc, #1c1b17);

+ --ink: light-dark(#33302a, #ece7dd);

+ --muted: light-dark(#69655c, #9c958a);

+ --border: light-dark(#e2dccf, rgba(255, 255, 255, 0.10));

+ --accent: light-dark(#647686, #93a8ba);

+ --accent-ink: light-dark(#ffffff, #0c1217);

+ --link: light-dark(#5c6e7c, #93a8ba);

+ --bubble-me: light-dark(#647686, #7d94a8);

+ --bubble-me-ink: light-dark(#ffffff, #0c1217);

+ --bubble-them: light-dark(#fbf9f4, #2a2823);

+/* Plum — soft grape; playful but not childish, light or deep-aubergine dark */

+[data-theme="plum"] {

+ --bg: light-dark(#ece2f0, #1a1320);

+ --panel: light-dark(#fdf8fd, #221829);

+ --sidebar: light-dark(#f4ecf6, #1e1525);

+ --ink: light-dark(#2f2436, #f0e6f4);

+ --muted: light-dark(#6f6578, #ab9bb5);

+ --border: light-dark(#e7dced, rgba(255, 255, 255, 0.10));

+ --accent: light-dark(#9456c9, #b57ae8);

+ --accent-ink: light-dark(#ffffff, #20102e);

+ --link: light-dark(#9456c9, #b57ae8);

+ --bubble-me: light-dark(#9456c9, #b57ae8);

+ --bubble-me-ink: light-dark(#ffffff, #20102e);

+ --bubble-them: light-dark(#f1e8f5, #2e2238);

+/* Default appearance: follow the OS. The app overrides this on <html> per the

+ saved preference (light / dark / system). */

+html { color-scheme: light dark; }

* { box-sizing: border-box; }

@@ -50,7 +161,7 @@ input, textarea {

border: 1px solid var(--border);

border-radius: 12px;

padding: 12px 14px;

- background: #fff;

+ background: var(--panel);

color: var(--ink);

width: 100%;

caret-color: var(--accent); /* the typing cursor picks up the accent (à la iMessage) */

@@ -74,9 +185,9 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

padding: 28px;

width: 100%;

max-width: 420px;

- box-shadow: 0 12px 40px rgba(20, 30, 80, 0.06);

+ box-shadow: 0 12px 40px var(--shadow);

}

-.card h1 { margin: 0 0 6px; font-size: 24px; }

+.card h1 { margin: 0 0 6px; font-size: 24px; font-family: var(--font-display); }

.card p { margin: 0 0 18px; color: var(--muted); }

.card .row { display: flex; gap: 10px; margin-top: 14px; }

@@ -104,7 +215,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

background: var(--panel);

border: 1px solid var(--border);

border-radius: 14px;

- box-shadow: 0 12px 40px rgba(20, 30, 80, 0.14);

+ box-shadow: 0 12px 40px var(--shadow);

min-width: 230px;

padding: 6px;

z-index: 20;

@@ -121,7 +232,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

white-space: normal;

}

.menu-item:hover { background: var(--bubble-them); }

-.menu-item.danger { color: #c2410c; }

+.menu-item.danger { color: var(--danger); }

.menu-item.disabled,

.menu-item.disabled:hover { color: var(--muted); cursor: default; background: transparent; }

@@ -157,7 +268,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

top: 50%;

left: 0;

transform: translate(-130%, -50%);

- color: var(--accent);

+ color: var(--link);

opacity: 0;

pointer-events: none;

display: inline-flex;

@@ -177,13 +288,13 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

.msg .bubble code {

font-family: ui-monospace, SFMono-Regular, Menlo, monospace;

font-size: 0.92em;

- background: rgba(0, 0, 0, 0.06);

+ background: color-mix(in srgb, var(--ink) 8%, transparent);

padding: 1px 5px;

border-radius: 5px;

}

-.msg.me .bubble code { background: rgba(255, 255, 255, 0.22); }

+.msg.me .bubble code { background: color-mix(in srgb, var(--bubble-me-ink) 22%, transparent); }

.msg.me { align-self: flex-end; align-items: flex-end; }

-.msg.me .bubble { background: var(--bubble-me); color: #fff; border-bottom-right-radius: 6px; }

+.msg.me .bubble { background: var(--bubble-me); color: var(--bubble-me-ink); border-bottom-right-radius: 6px; }

.msg.them .bubble { border-bottom-left-radius: 6px; }

.msg .bubble a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }

@@ -296,7 +407,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

position: absolute;

inset: 0;

z-index: 40;

- background: rgba(91, 108, 255, 0.12);

+ background: color-mix(in srgb, var(--accent) 12%, transparent);

border: 3px dashed var(--accent);

border-radius: 12px;

display: flex;

@@ -304,7 +415,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

justify-content: center;

font-weight: 700;

font-size: 18px;

- color: var(--accent);

+ color: var(--link);

pointer-events: none;

}

.file-chip {

@@ -320,7 +431,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

max-width: 260px;

word-break: break-word;

}

-.msg.me .file-chip { background: var(--bubble-me); color: #fff; }

+.msg.me .file-chip { background: var(--bubble-me); color: var(--bubble-me-ink); }

.file-chip .file-icon { font-size: 22px; line-height: 1; flex: none; }

.file-chip .file-meta { display: flex; flex-direction: column; min-width: 0; }

.file-chip .file-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

@@ -386,7 +497,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

top: 50%;

transform: translateY(-50%);

background: var(--ink);

- color: #fff;

+ color: var(--panel);

width: 22px;

height: 22px;

padding: 0;

@@ -413,7 +524,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

font-weight: 500;

line-height: 1.35;

}

-.reaction-chip.mine { border-color: var(--accent); background: #e7eaff; }

+.reaction-chip.mine { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 16%, var(--panel)); }

.emoji-picker {

position: fixed;

display: flex;

@@ -422,7 +533,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

border: 1px solid var(--border);

border-radius: 999px;

padding: 4px 6px;

- box-shadow: 0 12px 40px rgba(20, 30, 80, 0.18);

+ box-shadow: 0 12px 40px var(--shadow);

z-index: 60;

}

.emoji-opt {

@@ -436,7 +547,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

/* the "Reply" action in the message menu, set off from the emoji row */

.picker-action {

background: transparent;

- color: var(--accent);

+ color: var(--link);

padding: 4px 8px;

margin-left: 2px;

border-radius: 50%;

@@ -478,7 +589,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

.reply-count {

font-size: 11px;

font-weight: 600;

- color: var(--accent);

+ color: var(--link);

margin: 3px 6px 0;

cursor: pointer;

}

@@ -487,7 +598,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

.msg.flash { animation: flash-msg 1.2s ease; border-radius: var(--radius); }

@keyframes flash-msg {

0%, 100% { background: transparent; }

- 25% { background: rgba(91, 108, 255, 0.14); }

+ 25% { background: color-mix(in srgb, var(--accent) 16%, transparent); }

}

/* composer "Replying to …" / "Editing message" banners, above the composer

@@ -503,7 +614,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

.composer-edit { display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 14px; }

.banner-x { background: transparent; color: var(--muted); font-size: 20px; line-height: 1; padding: 0 6px; }

.reply-bar { display: flex; align-items: center; gap: 10px; }

-.reply-bar-icon { flex: none; color: var(--accent); display: inline-flex; }

+.reply-bar-icon { flex: none; color: var(--link); display: inline-flex; }

.reply-bar-icon svg { width: 18px; height: 18px; }

.reply-bar-body {

flex: 1;

@@ -596,7 +707,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

align-items: center;

justify-content: center;

background: var(--accent);

- color: #fff;

+ color: var(--accent-ink);

}

.send-btn[hidden] { display: none; }

.send-btn:disabled { opacity: 0.45; cursor: default; }

@@ -663,7 +774,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

color: var(--muted);

padding: 6px;

}

-.banner.warn { color: #b4530a; }

+.banner.warn { color: var(--warn); }

/* ---- admin ---- */

@@ -700,7 +811,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

.hidden { display: none !important; }

.toast {

position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);

- background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 999px;

+ background: var(--pill-bg); color: var(--pill-ink); padding: 10px 16px; border-radius: 999px;

font-size: 14px; opacity: 0; transition: opacity .2s; pointer-events: none;

z-index: 100; /* above full-screen overlays (qr-screen) so it's never hidden */

}

@@ -731,23 +842,23 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

left: 50%;

transform: translateX(-50%);

z-index: 90;

- background: var(--ink);

- color: #fff;

+ background: var(--pill-bg);

+ color: var(--pill-ink);

font-size: 13px;

font-weight: 600;

padding: 6px 14px;

border-radius: 999px;

- box-shadow: 0 6px 20px rgba(20, 30, 80, 0.25);

+ box-shadow: 0 6px 20px var(--shadow);

}

.conn-status.hidden { display: none; }

-.sidebar { width: 320px; flex: none; display: flex; flex-direction: column; border-right: 1px solid var(--border); min-height: 0; }

+.sidebar { width: 320px; flex: none; display: flex; flex-direction: column; background: var(--sidebar); border-right: 1px solid var(--border); min-height: 0; }

/* Both headers share a height so the thread pane's header lines up with the

sidebar's. Only the thread header carries a divider — the sidebar's "Chats"

header flows straight into the chat list (with the search field below it). */

.side-head, .thread-head { box-sizing: border-box; min-height: 62px; padding: 8px 16px; }

.thread-head { border-bottom: 1px solid var(--border); }

.side-head { display: flex; align-items: center; gap: 8px; }

-.side-head .title { flex: 1; min-width: 0; font-weight: 700; font-size: 17px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

+.side-head .title { flex: 1; min-width: 0; font-family: var(--font-display); font-weight: 700; font-size: 17px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.head-actions { display: flex; align-items: center; gap: 2px; flex: none; }

.avatar {

display: inline-flex; align-items: center; justify-content: center; flex: none;

@@ -774,7 +885,8 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

display: flex; align-items: center; gap: 12px; width: 100%; text-align: left;

background: transparent; color: var(--ink); border-radius: 14px; padding: 9px 14px;

}

-.thread-row:hover, .thread-row.active { background: var(--bubble-them); }

+.thread-row:hover { background: var(--bubble-them); }

+.thread-row.active { background: var(--row-active); }

/* Bigger avatar in the chat list (à la WhatsApp/iMessage); scoped to the list so

header/profile/reaction avatars keep their sizes. */

.thread-row .avatar { width: 52px; height: 52px; font-size: 21px; }

@@ -803,7 +915,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

.thread-view { flex: 1; display: flex; flex-direction: column; min-height: 0; min-width: 0; width: 100%; position: relative; }

.thread-head { display: flex; align-items: center; gap: 6px; }

.thread-head-title { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 1px; }

-.thread-title { font-weight: 700; font-size: 16px; line-height: 1.2; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

+.thread-title { font-family: var(--font-display); font-weight: 700; font-size: 16px; line-height: 1.2; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.thread-sub { font-size: 12px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.back-btn { display: none; font-size: 24px; padding: 0 8px; }

.feed { flex: 1; overflow-y: auto; overflow-x: hidden; min-height: 0; min-width: 0; padding: 16px; display: flex; flex-direction: column; gap: 4px; }

@@ -818,7 +930,7 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

.sheet { max-width: 460px; width: 100%; max-height: 82vh; overflow-y: auto; }

.sheet-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }

.sheet-head h2 { margin: 0; }

-.linkish { background: transparent; color: var(--accent); padding: 6px 8px; font-weight: 600; }

+.linkish { background: transparent; color: var(--link); padding: 6px 8px; font-weight: 600; }

.sheet-input { margin-bottom: 10px; }

/* full-bleed list inside the sheet: rows span the card edges (which pads 28px) */

.pick-list { margin: 4px -28px 0; max-height: 56vh; overflow-y: auto; }

@@ -832,6 +944,21 @@ input:focus, textarea:focus { outline: 2px solid var(--accent); border-color: tr

.list-row input { width: auto; }

.sheet-foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; }

+/* theme picker (kebab → Theme) */

+.appearance-seg { display: flex; gap: 6px; background: var(--bubble-them); border-radius: 12px; padding: 4px; }

+.appearance-seg button { flex: 1; background: transparent; color: var(--muted); border-radius: 9px; padding: 9px; font-weight: 600; }

+.appearance-seg button[aria-pressed="true"] { background: var(--panel); color: var(--ink); box-shadow: 0 1px 4px var(--shadow); }

+.theme-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }

+.theme-swatch {

+ display: flex; align-items: center; gap: 11px; text-align: left;

+ background: var(--panel); color: var(--ink);

+ border: 1px solid var(--border); border-radius: 14px; padding: 12px;

+ font-weight: 600; font-family: var(--font-display);

+.theme-swatch:hover { background: var(--bubble-them); }

+.theme-swatch.active { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }

+.theme-swatch .disc { width: 26px; height: 26px; border-radius: 50%; flex: none; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.12); }

/* mobile: show one pane at a time, toggled by .show-thread */

@media (max-width: 720px) {

.sidebar { width: 100%; border-right: none; }

diff --git a/web/static/ui.js b/web/static/ui.js

index 20228c8..a0461c5 100644

--- a/web/static/ui.js

+++ b/web/static/ui.js

@@ -1,5 +1,31 @@

// Small, framework-free UI helpers, kept here so they can be unit-tested in Node.

+// ---- themes -------------------------------------------------------------

+// Colour themes + appearance live entirely client-side (a localStorage pref,

+// never the server). These pure helpers are the single source of truth for the

+// valid values + defaults; chat.js applies them and the pre-paint script in the

+// page <head> mirrors this list (keep them in sync).

+export const THEMES = ["litroom", "lagoon", "sunny", "plum", "linen", "classic"];

+export const APPEARANCES = ["light", "dark", "system"];

+export const DEFAULT_THEME = "classic";

+export const DEFAULT_APPEARANCE = "system";

+// Coerce a stored (possibly stale/garbage) value to a valid theme/appearance.

+export function normalizeTheme(v) {

+ return THEMES.includes(v) ? v : DEFAULT_THEME;

+export function normalizeAppearance(v) {

+ return APPEARANCES.includes(v) ? v : DEFAULT_APPEARANCE;

+// The CSS `color-scheme` value for an appearance choice. "system" yields

+// "light dark" so light-dark() in the stylesheet follows the OS setting.

+export function colorScheme(appearance) {

+ if (appearance === "light") return "light";

+ if (appearance === "dark") return "dark";

+ return "light dark";

// shouldSend decides whether a keydown in the composer should send the message.

// Desktop (precise pointer): Enter sends, Shift+Enter inserts a newline.