server/Dockerfile

@@ -2,10 +2,10 @@ FROM python:3.12-slim
 
 WORKDIR /app
 
-# tzdata: python:3.12-slim doesn't include it by default, so a TZ
+# tzdata: python:3.12-slim doesn't include it by default, so the zoneinfo
-# environment variable (see docker-compose.yml.example -- used by the
+# database backing the web UI's "Timezone" setting (used by "Quiet hours")
-# "Quiet hours" setting) would silently fail to resolve and fall back to
+# would have no named zones to resolve without this -- ZoneInfo() would
-# UTC without this.
+# raise for anything other than "UTC".
 RUN apt-get update && apt-get install -y --no-install-recommends tzdata \
     && rm -rf /var/lib/apt/lists/*
 

server/README.md

@@ -52,7 +52,7 @@ algorithm itself -- it just streams the response straight to the panel.
   upcoming grid -- not Immich URL/API key, see Setup above)
 - `GET /api/albums` -- lists Immich albums (used by the config UI)
 - `POST /api/config` -- saves
-  album/order/orientation/refresh_interval_s/smart_crop_faces/queue_target_len/quiet_hours_*.
+  album/order/orientation/refresh_interval_s/smart_crop_faces/queue_target_len/quiet_hours_*/timezone.
   `orientation` (`landscape`, `portrait`, `landscape_flipped`,
   `portrait_flipped`) matches how the frame is physically hung: photos
   are composed/cropped for that shape (portrait crops at 480x800), then
@@ -66,10 +66,11 @@ algorithm itself -- it just streams the response straight to the panel.
   (`"HH:MM"`, may wrap past midnight, e.g. `22:00`-`07:00`) don't touch
   the device at all -- purely a server decision about what
   `refresh_interval_s` to hand back from `GET /frame/config` below,
-  computed in `_effective_refresh_interval_s`. Uses the server's local
+  computed in `_effective_refresh_interval_s`. Interpreted in the
-  timezone (`TZ` in `docker-compose.yml.example` -- the image needs
+  `timezone` set from the web UI's "Timezone" dropdown (an IANA zone
-  `tzdata` for a named zone to actually resolve, already installed in
+  name, e.g. `America/New_York`; defaults to `UTC`) -- no
-  the provided `Dockerfile`). The device can still land one wake right
+  docker-compose.yml edit or container restart needed to change it. The
+  device can still land one wake right
   at the start of the window (nothing server-side can prevent that
   without touching the firmware, since the device doesn't know wall-clock
   time), but from that wake on it's told to sleep exactly until the

server/app/config.py

@@ -27,15 +27,20 @@ class FrameConfig(BaseModel):
     order: str = "sequential"  # or "shuffle"
     refresh_interval_s: int = 3600
     # Quiet hours: no point waking the device overnight just to swap a
-    # photo nobody's looking at. Times are "HH:MM" in the server's local
+    # photo nobody's looking at. Times are "HH:MM" interpreted in
-    # timezone (see docker-compose.yml.example's TZ note) and may wrap
+    # `timezone` below and may wrap past midnight (e.g. start=22:00,
-    # past midnight (e.g. start=22:00, end=07:00). Purely a server-side
+    # end=07:00). Purely a server-side decision -- the device is unaware,
-    # decision -- the device is unaware, it just gets told a longer
+    # it just gets told a longer refresh_interval_s by GET /frame/config
-    # refresh_interval_s by GET /frame/config while quiet hours are in
+    # while quiet hours are in effect (see main.py's
-    # effect (see main.py's _effective_refresh_interval_s).
+    # _effective_refresh_interval_s).
     quiet_hours_enabled: bool = False
     quiet_hours_start: str = "22:00"
     quiet_hours_end: str = "07:00"
+    # IANA zone name (e.g. "America/New_York") quiet_hours_start/end are
+    # interpreted in. Set from the web UI rather than the container's TZ
+    # environment variable, so it survives container recreation and
+    # doesn't need a docker-compose.yml edit to change.
+    timezone: str = "UTC"
     smart_crop_faces: bool = True
     # How the physical frame is hung: landscape (native), portrait,
     # landscape_flipped, portrait_flipped. Purely a server-side render

server/app/main.py

@@ -7,6 +7,7 @@ import io
 import logging
 import time
 from datetime import datetime, timedelta
+from zoneinfo import ZoneInfo, available_timezones
 
 import httpx
 from fastapi import Depends, FastAPI, File, HTTPException, Form, Request, UploadFile
@@ -32,6 +33,11 @@ MAX_QUEUE_TARGET_LEN = 5000
 
 ORIENTATIONS = ("landscape", "portrait", "landscape_flipped", "portrait_flipped")
 
+# Populated once from the OS's zoneinfo database (installed via the
+# `tzdata` apt package in the Dockerfile) and offered as a <select> in the
+# web UI's "Timezone" field -- see api_config_save/index below.
+ALL_TIMEZONES = sorted(available_timezones())
+
 MANAGEMENT_TOKEN_COOKIE = "mgmt_token"
 
 # Battery-history / estimate tuning (see /frame/battery and _battery_estimate).
@@ -54,6 +60,17 @@ def _valid_hhmm(s: str) -> bool:
         return False
 
 
+def _zoneinfo(name: str) -> ZoneInfo:
+    """Falls back to UTC for an unrecognized zone name -- defensive only;
+    api_config_save already validates against ALL_TIMEZONES before saving,
+    so this only matters for a config.json hand-edited or written by an
+    older version of this file."""
+    try:
+        return ZoneInfo(name)
+    except Exception:
+        return ZoneInfo("UTC")
+
+
 def _quiet_hours_state(now: datetime, start_str: str, end_str: str) -> tuple[bool, datetime | None]:
     """Whether `now` falls inside the quiet-hours window, and the next
     boundary: if inside, when it ends; if outside, when it next starts.
@@ -102,7 +119,7 @@ def _effective_refresh_interval_s(cfg: config.FrameConfig) -> int:
     sleep exactly until the window ends."""
     if not cfg.quiet_hours_enabled:
         return cfg.refresh_interval_s
-    now = datetime.now()
+    now = datetime.now(_zoneinfo(cfg.timezone))
     in_quiet, boundary = _quiet_hours_state(now, cfg.quiet_hours_start, cfg.quiet_hours_end)
     if boundary is None:
         return cfg.refresh_interval_s
@@ -199,7 +216,9 @@ def index(request: Request):
             "token_prompt.html", {"request": request, "wrong": supplied is not None}
         )
 
-    response = templates.TemplateResponse("index.html", {"request": request, "cfg": cfg})
+    response = templates.TemplateResponse(
+        "index.html", {"request": request, "cfg": cfg, "timezones": ALL_TIMEZONES}
+    )
     supplied = request.query_params.get("token")
     if cfg.management_token and supplied == cfg.management_token:
         # Query-param access (typically the manage-menu QR code) earns a
@@ -234,6 +253,7 @@ def api_config_save(
     quiet_hours_enabled: bool = Form(False),
     quiet_hours_start: str = Form("22:00"),
     quiet_hours_end: str = Form("07:00"),
+    timezone: str = Form("UTC"),
 ):
     # Immich URL/API key are env-var only (IMMICH_URL/IMMICH_API_KEY, see
     # docker-compose.yml.example) -- config.load() already applies them,
@@ -261,6 +281,8 @@ def api_config_save(
             cfg.quiet_hours_start = quiet_hours_start
         if _valid_hhmm(quiet_hours_end):
             cfg.quiet_hours_end = quiet_hours_end
+        if timezone in ALL_TIMEZONES:
+            cfg.timezone = timezone
         config.save(cfg)
     return {"status": "saved"}
 

server/app/templates/base.html

@@ -0,0 +1,329 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>{% block title %}ESPresso Frame{% endblock %}</title>
+  <script>
+    // Applied before first paint so there's no flash of the wrong theme.
+    (function () {
+      try {
+        var stored = localStorage.getItem('theme');
+        if (stored === 'light' || stored === 'dark') {
+          document.documentElement.setAttribute('data-theme', stored);
+        }
+      } catch (e) { /* localStorage unavailable (private mode, etc.) */ }
+    })();
+  </script>
+  <style>
+    :root {
+      --bg: #f5f6f8;
+      --surface: #ffffff;
+      --surface-alt: #f0f1f4;
+      --border: #e3e5e9;
+      --text: #16181d;
+      --text-muted: #666d7a;
+      --accent: #2563eb;
+      --accent-hover: #1d4ed8;
+      --focus-ring: rgba(37, 99, 235, 0.35);
+      --success-bg: #dcfce7;
+      --success-text: #166534;
+      --danger-bg: #fee2e2;
+      --danger-text: #991b1b;
+      --warn-bg: #fef9c3;
+      --warn-text: #854d0e;
+      --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 3px rgba(16, 24, 40, 0.06);
+      --shadow-hover: 0 8px 20px rgba(16, 24, 40, 0.10);
+      --overlay: rgba(0, 0, 0, 0.55);
+      --overlay-hover: rgba(153, 27, 27, 0.85);
+      --color-scheme: light;
+    }
+    @media (prefers-color-scheme: dark) {
+      :root:not([data-theme="light"]) {
+        --bg: #0d1016;
+        --surface: #161a22;
+        --surface-alt: #1d222b;
+        --border: #2a2f3a;
+        --text: #e8eaed;
+        --text-muted: #9aa2b1;
+        --accent: #4c8dff;
+        --accent-hover: #6ea1ff;
+        --focus-ring: rgba(76, 141, 255, 0.4);
+        --success-bg: rgba(34, 197, 94, 0.16);
+        --success-text: #4ade80;
+        --danger-bg: rgba(239, 68, 68, 0.16);
+        --danger-text: #f87171;
+        --warn-bg: rgba(234, 179, 8, 0.16);
+        --warn-text: #fbbf24;
+        --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 2px 10px rgba(0, 0, 0, 0.35);
+        --shadow-hover: 0 10px 24px rgba(0, 0, 0, 0.45);
+        --overlay: rgba(0, 0, 0, 0.55);
+        --overlay-hover: rgba(248, 113, 113, 0.35);
+        --color-scheme: dark;
+      }
+    }
+    :root[data-theme="dark"] {
+      --bg: #0d1016;
+      --surface: #161a22;
+      --surface-alt: #1d222b;
+      --border: #2a2f3a;
+      --text: #e8eaed;
+      --text-muted: #9aa2b1;
+      --accent: #4c8dff;
+      --accent-hover: #6ea1ff;
+      --focus-ring: rgba(76, 141, 255, 0.4);
+      --success-bg: rgba(34, 197, 94, 0.16);
+      --success-text: #4ade80;
+      --danger-bg: rgba(239, 68, 68, 0.16);
+      --danger-text: #f87171;
+      --warn-bg: rgba(234, 179, 8, 0.16);
+      --warn-text: #fbbf24;
+      --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 2px 10px rgba(0, 0, 0, 0.35);
+      --shadow-hover: 0 10px 24px rgba(0, 0, 0, 0.45);
+      --overlay: rgba(0, 0, 0, 0.55);
+      --overlay-hover: rgba(248, 113, 113, 0.35);
+      --color-scheme: dark;
+    }
+
+    * { box-sizing: border-box; }
+
+    html {
+      color-scheme: var(--color-scheme);
+    }
+
+    body {
+      margin: 0;
+      font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+      background: var(--bg);
+      color: var(--text);
+      -webkit-font-smoothing: antialiased;
+      transition: background-color .15s ease, color .15s ease;
+    }
+
+    .page {
+      max-width: 1080px;
+      margin: 0 auto;
+      padding: 28px 20px 72px;
+    }
+    .page.page-narrow {
+      max-width: 420px;
+      padding-top: 88px;
+    }
+
+    .topbar {
+      display: flex;
+      align-items: flex-start;
+      justify-content: space-between;
+      gap: 16px;
+      margin-bottom: 24px;
+    }
+    .brand { display: flex; align-items: flex-start; gap: 12px; }
+    .brand-mark {
+      font-size: 26px;
+      line-height: 1;
+      margin-top: 2px;
+    }
+    h1 { font-size: 21px; margin: 0; letter-spacing: -0.01em; font-weight: 700; }
+    p.sub { color: var(--text-muted); font-size: 13.5px; margin: 5px 0 0; line-height: 1.5; }
+
+    .icon-btn {
+      flex: none;
+      width: 38px;
+      height: 38px;
+      border-radius: 50%;
+      border: 1px solid var(--border);
+      background: var(--surface);
+      color: var(--text);
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      font-size: 16px;
+      cursor: pointer;
+      box-shadow: var(--shadow);
+      transition: background-color .15s ease, border-color .15s ease, transform .1s ease;
+    }
+    .icon-btn:hover { background: var(--surface-alt); }
+    .icon-btn:active { transform: scale(0.94); }
+
+    h2.card-title {
+      font-size: 14.5px;
+      font-weight: 650;
+      margin: 0 0 14px;
+      letter-spacing: 0.01em;
+      text-transform: uppercase;
+      color: var(--text-muted);
+    }
+
+    .card {
+      background: var(--surface);
+      border: 1px solid var(--border);
+      border-radius: 14px;
+      padding: 20px 22px 22px;
+      box-shadow: var(--shadow);
+    }
+    .card + .card { margin-top: 20px; }
+
+    label { display: block; margin-top: 16px; font-size: 13px; font-weight: 600; color: var(--text); }
+    label:first-child { margin-top: 0; }
+
+    input, select {
+      width: 100%;
+      padding: 9px 10px;
+      box-sizing: border-box;
+      margin-top: 5px;
+      border: 1px solid var(--border);
+      border-radius: 8px;
+      font-size: 14px;
+      background: var(--bg);
+      color: var(--text);
+      font-family: inherit;
+      transition: border-color .15s ease, box-shadow .15s ease;
+    }
+    input:focus, select:focus {
+      outline: none;
+      border-color: var(--accent);
+      box-shadow: 0 0 0 3px var(--focus-ring);
+    }
+
+    .checkbox-row { display: flex; align-items: center; gap: 8px; margin-top: 16px; }
+    .checkbox-row input { width: auto; margin-top: 0; }
+    .checkbox-row label { margin-top: 0; font-weight: normal; }
+
+    button {
+      margin-top: 20px;
+      padding: 10px 16px;
+      border: none;
+      border-radius: 8px;
+      background: var(--accent);
+      color: white;
+      cursor: pointer;
+      font-size: 14px;
+      font-weight: 600;
+      font-family: inherit;
+      transition: background-color .15s ease, transform .1s ease;
+    }
+    button:hover { background: var(--accent-hover); }
+    button:active { transform: translateY(1px); }
+    button.secondary {
+      background: transparent;
+      color: var(--text);
+      border: 1px solid var(--border);
+      margin-right: 8px;
+    }
+    button.secondary:hover { background: var(--surface-alt); }
+
+    .status { margin-top: 16px; padding: 10px 12px; border-radius: 8px; font-size: 14px; }
+    .status.ok { background: var(--success-bg); color: var(--success-text); }
+    .status.err { background: var(--danger-bg); color: var(--danger-text); }
+    .info-box {
+      margin-bottom: 20px;
+      padding: 12px 14px;
+      border-radius: 10px;
+      font-size: 13px;
+      background: var(--surface-alt);
+      color: var(--text-muted);
+      border: 1px solid var(--border);
+    }
+    .info-box.warn { background: var(--warn-bg); color: var(--warn-text); border-color: transparent; }
+
+    code {
+      background: var(--surface-alt);
+      color: var(--text);
+      padding: 2px 5px;
+      border-radius: 4px;
+      font-size: 0.92em;
+    }
+    .info-box code, .info-box.warn code { background: rgba(127, 127, 127, 0.18); color: inherit; }
+
+    .thumb { width: 160px; max-width: 100%; border-radius: 8px; display: block; }
+
+    .photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px; margin-top: 8px; }
+    .photo-card {
+      position: relative; cursor: grab; border-radius: 8px; overflow: hidden; aspect-ratio: 1;
+      background: var(--surface-alt); border: 1px solid var(--border);
+      box-shadow: var(--shadow);
+      transition: box-shadow .15s ease, transform .15s ease;
+      /* pan-y (not none): lets a normal touch-scroll of the page work
+         when you touch a card without meaning to drag it. Dragging on
+         touch instead requires a brief hold first (see the JS below),
+         which switches this to "none" for the rest of that touch --
+         only once we're sure it's a deliberate drag, not a scroll. */
+      touch-action: pan-y;
+    }
+    .photo-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-1px); }
+    .photo-card:active { cursor: grabbing; }
+    .photo-card.dragging { opacity: 0.35; }
+    .photo-card.drag-armed { box-shadow: 0 0 0 3px var(--focus-ring) inset; }
+    .photo-card.drag-over { outline: 3px solid var(--accent); outline-offset: -3px; }
+    .photo-card img { width: 100%; height: 100%; object-fit: cover; display: block; pointer-events: none; }
+    .photo-card .badge { position: absolute; top: 6px; left: 6px; background: var(--overlay); color: white; font-size: 10px; padding: 2px 6px; border-radius: 4px; }
+    .photo-card .remove-btn, .thumb-wrap .remove-btn {
+      position: absolute; top: 6px; right: 6px; width: 22px; height: 22px; margin: 0; padding: 0;
+      line-height: 20px; text-align: center; font-size: 13px; border-radius: 50%;
+      background: var(--overlay); color: white;
+    }
+    .photo-card .remove-btn:hover, .thumb-wrap .remove-btn:hover { background: var(--overlay-hover); }
+    .photo-card .show-next {
+      position: absolute; bottom: 6px; left: 6px; right: 6px; margin: 0; padding: 5px 0;
+      font-size: 11px; text-align: center; background: rgba(37, 99, 235, 0.85); border-radius: 4px;
+    }
+    .thumb-wrap { position: relative; display: inline-block; }
+
+    .layout {
+      display: grid;
+      grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
+      gap: 20px;
+      align-items: start;
+    }
+    .side-col { display: flex; flex-direction: column; }
+    @media (max-width: 860px) {
+      .layout { grid-template-columns: 1fr; }
+    }
+  </style>
+  {% block extra_head %}{% endblock %}
+</head>
+<body>
+  <div class="page {% block page_class %}{% endblock %}">
+    <header class="topbar">
+      <div class="brand">
+        <span class="brand-mark" aria-hidden="true">☕</span>
+        <div>
+          <h1>ESPresso Frame</h1>
+          {% block subtitle %}{% endblock %}
+        </div>
+      </div>
+      <button type="button" id="theme-toggle" class="icon-btn" title="Toggle dark mode" aria-label="Toggle dark mode">🌓</button>
+    </header>
+
+    {% block content %}{% endblock %}
+  </div>
+
+  <script>
+    // Shared theme toggle: explicit choice wins over the OS preference and
+    // is remembered; with no explicit choice, the CSS above falls back to
+    // prefers-color-scheme on its own.
+    (function () {
+      var btn = document.getElementById('theme-toggle');
+      if (!btn) return;
+
+      function currentTheme() {
+        var stored = null;
+        try { stored = localStorage.getItem('theme'); } catch (e) { /* ignore */ }
+        if (stored === 'light' || stored === 'dark') return stored;
+        return (window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches) ? 'dark' : 'light';
+      }
+
+      function apply(theme) {
+        document.documentElement.setAttribute('data-theme', theme);
+        try { localStorage.setItem('theme', theme); } catch (e) { /* ignore */ }
+        document.dispatchEvent(new CustomEvent('themechange', { detail: { theme: theme } }));
+      }
+
+      btn.addEventListener('click', function () {
+        apply(currentTheme() === 'dark' ? 'light' : 'dark');
+      });
+    })();
+  </script>
+  {% block scripts %}{% endblock %}
+</body>
+</html>

server/app/templates/index.html

@@ -1,66 +1,10 @@
-<!DOCTYPE html>
+{% extends "base.html" %}
-<html lang="en">
-<head>
-  <meta charset="UTF-8" />
-  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>ESPresso Frame</title>
-  <style>
-    body { font-family: system-ui, sans-serif; max-width: 900px; margin: 40px auto; padding: 0 16px; color: #222; }
-    .config-panel { max-width: 480px; }
-    h1 { font-size: 20px; }
-    p.sub { color: #666; font-size: 14px; margin-top: -8px; }
-    label { display: block; margin-top: 16px; font-size: 13px; font-weight: 600; }
-    input, select { width: 100%; padding: 8px; box-sizing: border-box; margin-top: 4px; border: 1px solid #ccc; border-radius: 4px; font-size: 14px; }
-    .checkbox-row { display: flex; align-items: center; gap: 8px; margin-top: 16px; }
-    .checkbox-row input { width: auto; margin-top: 0; }
-    .checkbox-row label { margin-top: 0; font-weight: normal; }
-    button { margin-top: 20px; padding: 10px 16px; border: none; border-radius: 4px; background: #2563eb; color: white; cursor: pointer; font-size: 14px; }
-    button:hover { background: #1d4ed8; }
-    button.secondary { background: #6b7280; margin-right: 8px; }
-    .status { margin-top: 16px; padding: 10px; border-radius: 4px; font-size: 14px; }
-    .status.ok { background: #dcfce7; color: #166534; }
-    .status.err { background: #fee2e2; color: #991b1b; }
-    .info-box { margin-top: 16px; padding: 10px; border-radius: 4px; font-size: 13px; background: #f3f4f6; color: #444; }
-    .info-box.warn { background: #fef9c3; color: #854d0e; }
-    code { background: #f3f4f6; padding: 2px 5px; border-radius: 3px; }
-    h2.section { font-size: 16px; margin-top: 28px; margin-bottom: 8px; }
-    .thumb { width: 160px; max-width: 100%; border-radius: 4px; display: block; }
 
-    .photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px; margin-top: 8px; }
+{% block subtitle %}
-    .photo-card {
-      position: relative; cursor: grab; border-radius: 6px; overflow: hidden; aspect-ratio: 1;
-      background: #f3f4f6; border: 1px solid #e5e7eb;
-      /* pan-y (not none): lets a normal touch-scroll of the page work
-         when you touch a card without meaning to drag it. Dragging on
-         touch instead requires a brief hold first (see the JS below),
-         which switches this to "none" for the rest of that touch --
-         only once we're sure it's a deliberate drag, not a scroll. */
-      touch-action: pan-y;
-    }
-    .photo-card:active { cursor: grabbing; }
-    .photo-card.dragging { opacity: 0.35; }
-    .photo-card.drag-armed { box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.5) inset; }
-    .photo-card.drag-over { outline: 3px solid #2563eb; outline-offset: -3px; }
-    .photo-card img { width: 100%; height: 100%; object-fit: cover; display: block; pointer-events: none; }
-    .photo-card .badge { position: absolute; top: 6px; left: 6px; background: rgba(0, 0, 0, 0.6); color: white; font-size: 10px; padding: 2px 6px; border-radius: 3px; }
-    .photo-card .remove-btn, .thumb-wrap .remove-btn {
-      position: absolute; top: 6px; right: 6px; width: 22px; height: 22px; margin: 0; padding: 0;
-      line-height: 20px; text-align: center; font-size: 13px; border-radius: 50%;
-      background: rgba(0, 0, 0, 0.55); color: white;
-    }
-    .photo-card .remove-btn:hover, .thumb-wrap .remove-btn:hover { background: rgba(153, 27, 27, 0.85); }
-    .photo-card .show-next {
-      position: absolute; bottom: 6px; left: 6px; right: 6px; margin: 0; padding: 5px 0;
-      font-size: 11px; text-align: center; background: rgba(37, 99, 235, 0.85); border-radius: 4px;
-    }
-    .thumb-wrap { position: relative; display: inline-block; }
-  </style>
-</head>
-<body>
-  <h1>ESPresso Frame</h1>
 <p class="sub">Point your frame's "Tools Server" field at this server's <code>host:port</code>.</p>
+{% endblock %}
 
-  <div class="config-panel">
+{% block content %}
   {% if cfg.immich_url %}
     <div class="info-box">Immich: <code>{{ cfg.immich_url }}</code> (API key configured). Set via
       <code>IMMICH_URL</code>/<code>IMMICH_API_KEY</code> in <code>docker-compose.yml</code> -- see
@@ -71,6 +15,9 @@
       <code>docker-compose.yml.example</code>) and restart the server.</div>
   {% endif %}
 
+  <div class="layout">
+    <section class="card config-panel">
+      <h2 class="card-title">Settings</h2>
       <form id="config-form">
         <label>Album
           <select id="album_id">
@@ -109,11 +56,17 @@
         <label>Quiet hours end
           <input type="time" id="quiet_hours_end" value="{{ cfg.quiet_hours_end }}">
         </label>
-      <p class="sub" style="margin-top: 8px;">Uses the server's local timezone
+        <label>Timezone
-        (see <code>TZ</code> in <code>docker-compose.yml.example</code>). The
+          <select id="timezone">
-        device may still wake once right at the start of quiet hours -- it
+            {% for tz in timezones %}
-        can't know ahead of time -- but goes right back to sleep until they
+              <option value="{{ tz }}" {% if tz == cfg.timezone %}selected{% endif %}>{{ tz }}</option>
-        end.</p>
+            {% endfor %}
+          </select>
+        </label>
+        <p class="sub" style="margin-top: 8px;">Quiet hours times above are
+          interpreted in this timezone. The device may still wake once right
+          at the start of quiet hours -- it can't know ahead of time -- but
+          goes right back to sleep until they end.</p>
         <label>Upcoming photos to show
           <select id="queue_target_len">
             {% for n in [5, 10, 15, 20, 25, 30, 40, 50] %}
@@ -125,31 +78,46 @@
         <button type="submit">Save</button>
       </form>
       <div id="result"></div>
+    </section>
 
-    <h2 class="section">Now displaying</h2>
+    <div class="side-col">
+      <section class="card">
+        <h2 class="card-title">Now displaying</h2>
         <div id="current-thumb"><p class="sub">Loading...</p></div>
+      </section>
 
-    <h2 class="section">Device</h2>
+      <section class="card">
+        <h2 class="card-title">Device</h2>
         <div id="device-status"><p class="sub">Loading...</p></div>
+      </section>
 
-    <h2 class="section">Battery history</h2>
+      <section class="card">
+        <h2 class="card-title">Battery history</h2>
         <div id="battery-chart-wrap"><p class="sub">Loading...</p></div>
+      </section>
 
-    <h2 class="section">Firmware update</h2>
+      <section class="card">
+        <h2 class="card-title">Firmware update</h2>
         <p class="sub" id="firmware-available">
           {% if cfg.firmware_available_version %}Uploaded: v{{ cfg.firmware_available_version }} -- the frame
           updates itself on its next wake if it's running something else.{% else %}No firmware uploaded yet.{% endif %}
         </p>
         <input type="file" id="firmware-file" accept=".bin">
         <button type="button" class="secondary" id="firmware-upload">Upload firmware</button>
+      </section>
+    </div>
   </div>
 
-  <h2 class="section">Upcoming</h2>
+  <section class="card" style="margin-top: 20px;">
+    <h2 class="card-title">Upcoming</h2>
     <p class="sub">Drag a photo to reorder (on touch, hold briefly first so a
       normal scroll still works), "Show next" to jump it to the front, or
       the &times; to remove it from rotation entirely.</p>
     <div id="upcoming-grid" class="photo-grid"></div>
+  </section>
+{% endblock %}
 
+{% block scripts %}
   <script>
     const resultEl = document.getElementById('result');
 
@@ -169,6 +137,7 @@
         quiet_hours_enabled: String(document.getElementById('quiet_hours_enabled').checked),
         quiet_hours_start: document.getElementById('quiet_hours_start').value || '22:00',
         quiet_hours_end: document.getElementById('quiet_hours_end').value || '07:00',
+        timezone: document.getElementById('timezone').value || 'UTC',
       });
       const resp = await fetch('/api/config', {
         method: 'POST',
@@ -472,7 +441,7 @@
         const p = document.createElement('p');
         p.className = 'sub';
         if (alert) {
-          p.style.color = '#991b1b';
+          p.style.color = 'var(--danger-text)';
           p.style.fontWeight = '600';
         }
         p.textContent = `${label}: ${value}`;
@@ -548,7 +517,17 @@
       }
     }
 
+    // Reads resolved colors from CSS custom properties rather than
+    // hardcoding hex values, so the chart matches the current theme
+    // (light/dark) without needing its own separate palette.
+    function themeColor(name) {
+      return getComputedStyle(document.documentElement).getPropertyValue(name).trim();
+    }
+
+    let lastBatteryLog = null;
+
     function drawBatteryChart(log) {
+      lastBatteryLog = log;
       const wrap = document.getElementById('battery-chart-wrap');
       if (!log || log.length < 2) {
         wrap.innerHTML = '<p class="sub">Not enough data yet.</p>';
@@ -560,11 +539,16 @@
       const canvas = document.createElement('canvas');
       canvas.width = width;
       canvas.height = height;
-      canvas.style.border = '1px solid #e5e7eb';
+      canvas.style.display = 'block';
-      canvas.style.borderRadius = '4px';
+      canvas.style.border = `1px solid ${themeColor('--border')}`;
+      canvas.style.borderRadius = '8px';
       wrap.appendChild(canvas);
       const ctx = canvas.getContext('2d');
 
+      const gridColor = themeColor('--border');
+      const mutedColor = themeColor('--text-muted');
+      const accentColor = themeColor('--accent');
+
       const pad = { left: 28, right: 8, top: 10, bottom: 20 };
       const plotW = width - pad.left - pad.right;
       const plotH = height - pad.top - pad.bottom;
@@ -577,8 +561,8 @@
       const x = (t) => pad.left + ((t - minT) / spanT) * plotW;
       const y = (pct) => pad.top + (1 - pct / 100) * plotH;
 
-      ctx.strokeStyle = '#e5e7eb';
+      ctx.strokeStyle = gridColor;
-      ctx.fillStyle = '#999';
+      ctx.fillStyle = mutedColor;
       ctx.font = '10px system-ui, sans-serif';
       ctx.lineWidth = 1;
       ctx.textAlign = 'left';
@@ -591,7 +575,7 @@
         ctx.fillText(String(pct), 2, yy + 3);
       });
 
-      ctx.strokeStyle = '#2563eb';
+      ctx.strokeStyle = accentColor;
       ctx.lineWidth = 1.5;
       ctx.beginPath();
       log.forEach((p, i) => {
@@ -603,7 +587,7 @@
       ctx.stroke();
 
       const fmt = (t) => new Date(t * 1000).toLocaleDateString(undefined, { month: 'short', day: 'numeric' });
-      ctx.fillStyle = '#666';
+      ctx.fillStyle = mutedColor;
       ctx.textAlign = 'left';
       ctx.fillText(fmt(minT), pad.left, height - 4);
       ctx.textAlign = 'right';
@@ -628,6 +612,18 @@
     loadQueue();
     loadBatteryLog();
 
+    // Redraw the canvas chart (and the "Last seen" alert color) with the
+    // new theme's colors as soon as the toggle in the header is used --
+    // canvas pixels don't repaint themselves the way CSS does.
+    document.addEventListener('themechange', () => {
+      if (lastBatteryLog) {
+        drawBatteryChart(lastBatteryLog);
+      }
+      if (lastDevice) {
+        renderDeviceStatus(lastDevice);
+      }
+    });
+
     // Fast tick: re-renders "Last seen"/"On battery for" etc. from the
     // already-fetched device data every second, so they count up smoothly
     // (1s ago, 5s ago, 1m ago...) without hitting the server that often.
@@ -642,5 +638,4 @@
     // refresh. Skipped mid-drag (see loadQueue above).
     setInterval(loadQueue, 10000);
   </script>
-</body>
+{% endblock %}
-</html>

server/app/templates/token_prompt.html

@@ -1,23 +1,13 @@
-<!DOCTYPE html>
+{% extends "base.html" %}
-<html lang="en">
+
-<head>
+{% block page_class %}page-narrow{% endblock %}
-  <meta charset="UTF-8" />
+
-  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+{% block subtitle %}
-  <title>ESPresso Frame</title>
-  <style>
-    body { font-family: system-ui, sans-serif; max-width: 360px; margin: 80px auto; padding: 0 16px; color: #222; }
-    h1 { font-size: 20px; }
-    p.sub { color: #666; font-size: 14px; }
-    label { display: block; margin-top: 16px; font-size: 13px; font-weight: 600; }
-    input { width: 100%; padding: 8px; box-sizing: border-box; margin-top: 4px; border: 1px solid #ccc; border-radius: 4px; font-size: 14px; }
-    button { margin-top: 20px; padding: 10px 16px; border: none; border-radius: 4px; background: #2563eb; color: white; cursor: pointer; font-size: 14px; width: 100%; }
-    button:hover { background: #1d4ed8; }
-    .status.err { margin-top: 16px; padding: 10px; border-radius: 4px; font-size: 14px; background: #fee2e2; color: #991b1b; }
-  </style>
-</head>
-<body>
-  <h1>ESPresso Frame</h1>
 <p class="sub">This management page needs an access token.</p>
+{% endblock %}
+
+{% block content %}
+  <section class="card">
     {% if wrong %}
     <div class="status err">Invalid token.</div>
     {% endif %}
@@ -26,5 +16,5 @@
       <input type="text" id="token" name="token" autofocus autocomplete="off">
       <button type="submit">Continue</button>
     </form>
-</body>
+  </section>
-</html>
+{% endblock %}

server/docker-compose.yml.example

@@ -10,10 +10,6 @@ services:
       - CONFIG_PATH=/data/config.json
       - IMMICH_URL=http://your-immich-host:2283
       - IMMICH_API_KEY=your-immich-api-key-here
-      # Set this to your local timezone (e.g. America/New_York) if you use
-      # the "Quiet hours" setting -- without it, the container defaults to
-      # UTC, and quiet hours would run on UTC clock time instead of yours.
-      - TZ=UTC
       # Optional: gates the entire server -- the web UI (/, /api/*) AND
       # every device-facing /frame/* endpoint -- behind this shared secret.
       # Leave unset to keep it all open on a trusted LAN, same as before.