/* Dashboard Studio editor + runtime. */
(function () {
  const { esc, domainOf, isOn, friendly, fmtState, relTime, clockHTML, cap } = window.HAFmt;
  const Widgets = window.Widgets;
  const Icons = window.Icons;
  const tr = window.I18n.t, LOCALE = window.I18n.locale;
  // Filled in by the server; "dev" when index.html is opened some other way.
  const APP_VERSION = (document.querySelector('meta[name="ds-version"]')?.content || "dev").replace("__VERSION__", "dev");
  const REPO_URL = "https://git.melvanveen.nl/veenm/ha-dashboard-studio";
  /** Option labels: a direct translation when there is one, else the capitalised value. */
  const optLabel = (o) => (tr(o) !== o ? tr(o) : tr(cap(String(o).replace("-", " "))));
  const $ = (s, el = document) => el.querySelector(s);
  const uid = () => Math.random().toString(36).slice(2, 10);
  const clone = (o) => JSON.parse(JSON.stringify(o));

  // Ingress serves us under /api/hassio_ingress/<token>/ — keep every URL relative to that.
  const BASE = new URL(location.pathname.endsWith("/") ? location.pathname : location.pathname + "/", location.origin);

  const lsGet = (k) => { try { return localStorage.getItem(k); } catch { return null; } };
  const lsSet = (k, v) => { try { localStorage.setItem(k, v); } catch { /* private mode */ } };
  const prefersDark = () => matchMedia("(prefers-color-scheme: dark)").matches;

  // ------------------------------------------------------------ HA connection
  class HA {
    constructor() {
      this.states = {};
      this.nextId = 1;
      this.pending = new Map();
      this.connected = false;
      this.onChange = () => {};
      this.onStatus = () => {};
      this.ready = new Promise((r) => (this._markReady = r));
    }
    connect() {
      const url = new URL("ws", BASE);
      url.protocol = location.protocol === "https:" ? "wss:" : "ws:";
      const ws = (this.ws = new WebSocket(url));
      ws.onmessage = (ev) => this.handle(JSON.parse(ev.data));
      ws.onclose = () => {
        if (this.connected) this.ready = new Promise((r) => (this._markReady = r));
        this.connected = false;
        this.onStatus(false);
        for (const p of this.pending.values()) p.reject?.(new Error("disconnected"));
        this.pending.clear();
        setTimeout(() => this.connect(), 3000);
      };
    }
    send(msg, onEvent) {
      const id = this.nextId++;
      return new Promise((resolve, reject) => {
        this.pending.set(id, { resolve, reject, onEvent });
        this.ws.send(JSON.stringify({ ...msg, id }));
      });
    }
    async handle(m) {
      if (m.type === "ready") {
        const states = await this.send({ type: "get_states" });
        this.states = Object.fromEntries(states.map((s) => [s.entity_id, s]));
        this.send({ type: "subscribe_events", event_type: "state_changed" }, (ev) => {
          const { entity_id, new_state } = ev.data;
          if (new_state) this.states[entity_id] = new_state;
          else delete this.states[entity_id];
          this.onChange(entity_id);
        });
        this.connected = true;
        this._markReady();
        this.onStatus(true);
        this.onChange(null);
        return;
      }
      if (m.type === "error" && m.id == null) {
        // The server closes and we reconnect every few seconds; don't repeat the same message.
        if (m.message !== this.lastError || Date.now() - this.lastErrorAt > 60000) toast(m.message, true);
        this.lastError = m.message; this.lastErrorAt = Date.now();
        return;
      }
      const p = this.pending.get(m.id);
      if (!p) return;
      if (m.type === "event") { p.onEvent?.(m.event); return; }
      if (m.type === "result") {
        if (!p.onEvent) this.pending.delete(m.id);
        if (m.success) p.resolve(m.result);
        else p.reject(new Error(m.error?.message || "Request failed"));
      }
    }
    callService(domain, service, data = {}, entityId) {
      if (!this.connected) { toast(tr("Not connected to Home Assistant. Retrying…"), true); return Promise.resolve(); }
      const msg = { type: "call_service", domain, service, service_data: data };
      if (entityId) msg.target = { entity_id: entityId };
      return this.send(msg).catch((e) => toast(tr("{0} failed: {1}", `${domain}.${service}`, e.message), true));
    }
    /** Events from calendar entities, via calendar.get_events with return_response. */
    async calendarEvents(entityIds, start, end) {
      await this.ready;
      const res = await this.send({
        type: "call_service", domain: "calendar", service: "get_events",
        target: { entity_id: entityIds },
        service_data: { start_date_time: start.toISOString(), end_date_time: end.toISOString() },
        return_response: true,
      });
      return res?.response || {};
    }
    /** Today's and the coming days' forecast, via weather.get_forecasts with return_response. */
    async forecast(entityId, type = "daily") {
      await this.ready;
      const res = await this.send({
        type: "call_service", domain: "weather", service: "get_forecasts",
        target: { entity_id: entityId }, service_data: { type }, return_response: true,
      });
      return res?.response?.[entityId]?.forecast || [];
    }
    async history(entityIds, hours) {
      await this.ready;
      const res = await this.send({
        type: "history/history_during_period",
        start_time: new Date(Date.now() - hours * 3600e3).toISOString(),
        entity_ids: entityIds,
        minimal_response: true,
        no_attributes: true,
        significant_changes_only: false,
      });
      const out = {};
      for (const [eid, rows] of Object.entries(res || {})) {
        out[eid] = rows.map((r) => [(r.lu ?? r.lc ?? 0) * 1000, Number(r.s)]);
      }
      return out;
    }
  }

  const ha = new HA();

  // ------------------------------------------------------------ themes
  // "System" keeps the adaptive light/dark tokens from style.css.
  const COLOR_KEYS = ["bg", "tile", "text", "text2", "accent", "separator", "fill", "lit"];
  const PRESETS = {
    System: { swatch: ["#f2f2f7", "#1c1c1e"] },
    Light: { bg: "#f2f2f7", tile: "#ffffff", text: "#1d1d1f", text2: "#6e6e73", accent: "#0066cc", separator: "rgba(60,60,67,0.16)", fill: "rgba(120,120,128,0.14)", lit: "#ffedc7", shadow: true, blur: 0 },
    Dark: { bg: "#0f0f11", tile: "#1c1c1e", text: "#f5f5f7", text2: "#a1a1a6", accent: "#0a84ff", separator: "rgba(84,84,88,0.55)", fill: "rgba(118,118,128,0.24)", lit: "#ffe2a8", shadow: false, blur: 0 },
    Nord: { bg: "#2e3440", tile: "#3b4252", text: "#eceff4", text2: "#c2c9d6", accent: "#88c0d0", separator: "rgba(216,222,233,0.14)", fill: "rgba(216,222,233,0.12)", lit: "#f3e3bf", shadow: false, blur: 0 },
    Dusk: { bg: "linear-gradient(160deg, #1d2b53 0%, #4b2a59 55%, #9a4d55 100%)", tile: "rgba(255,255,255,0.12)", text: "#ffffff", text2: "rgba(255,255,255,0.78)", accent: "#ffcf6b", separator: "rgba(255,255,255,0.18)", fill: "rgba(255,255,255,0.16)", lit: "#ffe2a8", shadow: false, blur: 20 },
    Forest: { bg: "#0e1a14", tile: "#17271e", text: "#e6f2ea", text2: "#a9c2b2", accent: "#5fd38d", separator: "rgba(230,242,234,0.12)", fill: "rgba(230,242,234,0.1)", lit: "#f1e6b8", shadow: false, blur: 0 },
  };

  const DEFAULT_THEME = { preset: "System", surface: "cards", radius: 20, bgImage: "", blur: 0, shadow: true };
  const DEFAULT_GRID = { cols: 12, rowHeight: 72, gap: 14, maxWidth: 1440 };
  const DEFAULT_KIOSK = { saver: 0, exitCorner: "top-right", hideCursor: true };

  const newTab = (name, icon = "home") => ({ id: uid(), name, icon, widgets: [] });
  const newDashboard = (name) => ({ id: uid(), name, theme: { ...DEFAULT_THEME }, grid: { ...DEFAULT_GRID }, kiosk: { ...DEFAULT_KIOSK }, nav: { show: false, style: "icons" }, tabs: [newTab(tr("Overview"))] });

  // Bring dashboards saved by older versions up to the current shape.
  function migrate(d) {
    const t = d.theme || {};
    if (!t.preset) {
      t.preset = "Custom";
      if (t.card && !t.tile) t.tile = t.card;
      if (t.border && !t.separator) t.separator = t.border;
    }
    d.theme = { ...DEFAULT_THEME, ...t };
    d.grid = { ...DEFAULT_GRID, ...(d.grid || {}) };
    d.kiosk = { ...DEFAULT_KIOSK, ...(d.kiosk || {}) };
    d.nav = { show: false, style: "icons", ...(d.nav || {}) };
    if (!Array.isArray(d.tabs) || !d.tabs.length) d.tabs = [{ ...newTab(tr("Overview")), widgets: d.widgets || [] }];
    delete d.widgets;
    return d;
  }

  function makeWidget(type, x = 0, y = 0) {
    const def = Widgets[type];
    const cfg = {};
    for (const f of def.fields) if ("d" in f) cfg[f.k] = typeof f.d === "string" && f.t !== "seg" ? tr(f.d) : f.d;
    if (def.fields.some((f) => f.t === "entities")) cfg.entities = [];
    return { id: uid(), type, x, y, w: def.size[0], h: def.size[1], cfg, style: { transparent: !!def.transparent, bg: "", color: "", accent: "" } };
  }

  function starterDashboard() {
    const d = newDashboard(tr("Home"));
    const ids = Object.keys(ha.states);
    const first = (dom, n = 1) => ids.filter((e) => domainOf(e) === dom).slice(0, n);
    const put = (type, x, y, w, h, cfg) => { const wd = makeWidget(type, x, y); Object.assign(wd, { w, h }); Object.assign(wd.cfg, cfg); d.tabs[0].widgets.push(wd); return wd; };
    const numeric = (e) => !isNaN(Number(ha.states[e].state));

    put("heading", 0, 0, 8, 1, { text: tr("Home"), subtitle: tr("Everything at a glance") });
    const weather = first("weather")[0];
    put("clock", 8, 0, 4, 3, { weather: weather || "" });
    if (weather) put("weather", 0, 1, 4, 2, { entity: weather });
    const lights = first("light", 3);
    if (lights[0]) put("light", 4, 1, 4, 2, { entity: lights[0] });

    const sensors = ids.filter((e) => domainOf(e) === "sensor" && numeric(e) && !/battery|range|odometer|charging|afvalwijzer|washer|dryer|dishwasher|remaining|progress/.test(e)).slice(0, 2);
    sensors.forEach((e, i) => put("value", i * 3, 3, 3, 2, { entity: e }));
    const tiles = [...lights.slice(1, 2), ...first("switch", 1)];
    tiles.forEach((e, i) => put("entity", 6 + i * 3, 3, 3, 2, { entity: e }));

    // A car is recognisable as a lock with a sibling "<name>_battery" sensor.
    const carLock = first("lock", 20).find((l) => ha.states[`sensor.${l.split(".")[1].replace(/_[^_]+$/, "")}_battery`]);
    let y = 5;
    if (carLock) {
      const base = carLock.split(".")[1].replace(/_[^_]+$/, "");
      const pick = (dom, suffix) => (ha.states[`${dom}.${base}_${suffix}`] ? `${dom}.${base}_${suffix}` : "");
      put("car", 0, y, 6, 3, {
        name: cap(base.replace(/_/g, " ")).replace(/\b\w/g, (m) => m.toUpperCase()),
        level: pick("sensor", "battery"), range: pick("sensor", "range"), charging: pick("binary_sensor", "charging"),
        power: pick("sensor", "charging_power"), plug: pick("binary_sensor", "plug"), limit: pick("number", "charge_limit"),
        lock: carLock, climate: pick("climate", "climate"), location: pick("device_tracker", "location"), odometer: pick("sensor", "odometer"),
      });
    }
    const sw = [...first("switch", 3).slice(1), ...first("input_boolean", 1), ...first("fan", 1), ...lights.slice(2)];
    if (sw.length) put("list", carLock ? 6 : 8, y, carLock ? 6 : 4, 3, { title: tr("Quick controls"), entities: sw });
    const graphSensors = ids.filter((e) => domainOf(e) === "sensor" && numeric(e) && ha.states[e].attributes.device_class === "temperature").slice(0, 2);
    if (graphSensors.length) put("graph", 0, carLock ? y + 3 : y, carLock ? 12 : 8, 3, { entities: graphSensors, title: tr("Temperature, last 24 hours") });
    const players = first("media_player", 4);
    const appliances = [["washer", /(washer|washing_machine|wasmachine)_(status|state|operation_state|program_state)$/, "Washing machine"],
      ["dryer", /(dryer|droger|wasdroger)_(status|state|operation_state|program_state)$/, "Dryer"],
      ["dishwasher", /(dishwasher|vaatwasser|vaatwasmachine)_(status|state|operation_state|program_state)$/, "Dishwasher"]]
      .map(([kind, re, name]) => ({ kind, name, status: ids.find((e) => domainOf(e) === "sensor" && re.test(e)) })).filter((a) => a.status);
    if (players.length || appliances.length) {
      let y2 = Math.max(0, ...d.tabs[0].widgets.map((w) => w.y + w.h)), x2 = 0;
      if (players.length) { put("media", 0, y2, 4, 3, { entities: players }); x2 = 4; }
      for (const a of appliances) {
        const base = a.status.replace(/_(status|state|operation_state|program_state)$/, "");
        const pick = (...suffixes) => suffixes.map((sfx) => `${base}_${sfx}`).find((e) => ha.states[e]) || "";
        if (x2 + 4 > 12) { x2 = 0; y2 += 3; }
        put("appliance", x2, y2, 4, 2, { name: tr(a.name), kind: a.kind, status: a.status, remaining: pick("remaining_time", "time_remaining", "remaining", "end_time", "finish_time"), progress: pick("progress", "program_progress"), program: pick("program", "selected_program", "active_program"), power: pick("power") });
        x2 += 4;
      }
    }
    if (ids.some((e) => e.startsWith("sensor.afvalwijzer_") && "is_collection_date_today" in ha.states[e].attributes)) {
      const bottom = Math.max(0, ...d.tabs[0].widgets.map((w) => w.y + w.h));
      put("waste", 0, bottom, 4, 4, {});
    }
    return d;
  }

  // ------------------------------------------------------------ app state
  let store = { version: 1, dashboards: [] };
  let current = null;
  let editMode = lsGet("ds.edit") === "1";
  let selectedId = null;
  let activeTabId = null;
  /** The tab whose widgets are on screen. */
  const tab = () => current.tabs.find((t) => t.id === activeTabId) || current.tabs[0];
  const undoStack = [], redoStack = [];
  let lastMutKey = null, lastMutAt = 0;
  const caches = {}; // per-widget runtime cache (graph history)

  const gridEl = $("#grid"), stageEl = $("#stage"), canvasEl = $("#canvas"), navEl = $("#tabnav");
  let metrics = { colW: 0, rh: 72, gap: 14, cols: 12, compact: false };

  // ------------------------------------------------------------ persistence
  let saveTimer = null, savePending = false;
  function scheduleSave() {
    savePending = true;
    $("#save-status").textContent = tr("Saving…");
    clearTimeout(saveTimer);
    saveTimer = setTimeout(save, 700);
  }
  async function save() {
    savePending = false;
    try {
      const r = await fetch(new URL("api/dashboards", BASE), { method: "PUT", headers: { "Content-Type": "application/json" }, body: JSON.stringify(store) });
      if (!r.ok) throw new Error(r.status);
      $("#save-status").textContent = tr("Saved");
    } catch {
      $("#save-status").textContent = tr("Not saved");
      toast(tr("Couldn’t save. Your changes are kept here and will save on the next edit."), true);
    }
  }

  /** Apply a change to the current dashboard with undo support.
   *  `key` coalesces rapid edits (typing) into one undo step. */
  function mutate(fn, key, { rerender = true } = {}) {
    const now = Date.now();
    if (!(key && key === lastMutKey && now - lastMutAt < 1200)) {
      undoStack.push(JSON.stringify(current));
      if (undoStack.length > 100) undoStack.shift();
      redoStack.length = 0;
    }
    lastMutKey = key; lastMutAt = now;
    fn();
    scheduleSave();
    updateUndoButtons();
    if (rerender) renderGrid();
  }

  function restore(snapshot) {
    const idx = store.dashboards.findIndex((d) => d.id === current.id);
    current = JSON.parse(snapshot);
    store.dashboards[idx] = current;
    if (!tab().widgets.some((w) => w.id === selectedId)) selectedId = null;
    lastMutKey = null;
    scheduleSave(); updateUndoButtons(); renderAll();
  }
  function undo() { if (undoStack.length) { redoStack.push(JSON.stringify(current)); restore(undoStack.pop()); } }
  function redo() { if (redoStack.length) { undoStack.push(JSON.stringify(current)); restore(redoStack.pop()); } }
  function updateUndoButtons() {
    $("#btn-undo").disabled = !undoStack.length;
    $("#btn-redo").disabled = !redoStack.length;
  }

  // ------------------------------------------------------------ rendering
  const VAR_FOR = { bg: "--d-bg", tile: "--d-tile", text: "--d-text", text2: "--d-text-2", accent: "--d-accent", separator: "--d-separator", fill: "--d-fill", lit: "--d-lit" };

  function applyTheme() {
    const t = current.theme, s = stageEl.style;
    stageEl.classList.remove("surface-cards", "surface-outline", "surface-plain");
    stageEl.classList.add(`surface-${t.surface || "cards"}`);
    for (const k of COLOR_KEYS) {
      if (t.preset !== "System" && t[k]) s.setProperty(VAR_FOR[k], t[k]);
      else s.removeProperty(VAR_FOR[k]);
    }
    const bg = t.preset !== "System" && t.bg ? t.bg : "var(--canvas)";
    if (t.bgImage) s.setProperty("--d-bg", `center / cover no-repeat url("${t.bgImage.replace(/"/g, "")}"), ${bg}`);
    s.setProperty("--d-radius", `${t.radius ?? 20}px`);
    s.setProperty("--d-blur", `${t.blur || 0}px`);
    if (t.preset === "System") s.removeProperty("--d-shadow");
    else s.setProperty("--d-shadow", t.shadow ? "0 1px 2px rgba(0,0,0,.04), 0 4px 16px rgba(0,0,0,.06)" : "none");
  }

  function computeMetrics() {
    const g = current.grid;
    const pad = window.innerWidth < 560 ? 12 : 20;
    const avail = canvasEl.clientWidth - pad * 2;
    const width = g.maxWidth ? Math.min(avail, Number(g.maxWidth)) : avail;
    const compact = !editMode && width < 560;
    const cols = compact ? 2 : Math.max(1, Number(g.cols) || 12);
    const gap = compact ? Math.min(Number(g.gap) || 0, 12) : Number(g.gap) || 0;
    const rh = Number(g.rowHeight) || 72;
    metrics = { width, cols, gap, rh, colW: (width - gap * (cols - 1)) / cols, compact };
    gridEl.style.width = `${width}px`;
    gridEl.style.margin = `${editMode ? 4 : 8}px auto ${pad}px`;
  }

  // Compact widths: two columns in reading order. Small widgets take one column, the rest the full width.
  // ------------------------------------------------------------ visibility
  // A widget can carry conditions ("show only when the washer is running"); widgets may
  // also hide themselves (autoHide). Editing always shows everything.
  function ruleMatches(r) {
    const st = String(ha.states[r.entity]?.state ?? "unavailable").toLowerCase();
    const v = String(r.value ?? "").trim().toLowerCase();
    switch (r.op) {
      case "is not": return st !== v;
      case "above": return Number(st) > Number(v);
      case "below": return Number(st) < Number(v);
      default: return st === v;
    }
  }
  function isVisible(w) {
    if (Widgets[w.type]?.autoHide?.(w.cfg, ctxFor(w))) return false;
    const rules = (w.visibility?.rules || []).filter((r) => r.entity);
    if (!rules.length) return true;
    return w.visibility.mode === "any" ? rules.some(ruleMatches) : rules.every(ruleMatches);
  }
  const ruleEntities = (w) => (w.visibility?.rules || []).map((r) => r.entity).filter(Boolean);
  let lastVisible = {};

  function positions() {
    const map = {};
    const shown = editMode ? tab().widgets : tab().widgets.filter(isVisible);
    if (!metrics.compact) {
      if (editMode) { for (const w of shown) map[w.id] = w; return map; }
      // Rows that only hidden widgets used close up, so nothing leaves a hole.
      const rows = (list) => { const set = new Set(); for (const w of list) for (let r = w.y; r < w.y + w.h; r++) set.add(r); return set; };
      const vis = rows(shown), gone = [...rows(tab().widgets.filter((w) => !shown.includes(w)))].filter((r) => !vis.has(r));
      for (const w of shown) map[w.id] = { x: w.x, y: w.y - gone.filter((r) => r < w.y).length, w: w.w, h: w.h };
      return map;
    }
    const sorted = [...shown].sort((a, b) => a.y - b.y || a.x - b.x);
    const small = (w) => w.w <= Math.floor(current.grid.cols / 4) && w.type !== "heading";
    let y = 0, halfOpen = null;
    for (const w of sorted) {
      if (small(w)) {
        if (halfOpen) { map[w.id] = { x: 1, y: halfOpen.y, w: 1, h: halfOpen.h }; y = halfOpen.y + halfOpen.h; halfOpen = null; }
        else { const h = Math.max(2, w.h); map[w.id] = { x: 0, y, w: 1, h }; halfOpen = { y, h }; }
      } else {
        if (halfOpen) { y = halfOpen.y + halfOpen.h; halfOpen = null; }
        const h = w.type === "clock" ? Math.min(w.h, 2) : w.h;
        map[w.id] = { x: 0, y, w: 2, h };
        y += h;
      }
    }
    return map;
  }

  function rectFor(p) {
    const { colW, gap, rh } = metrics;
    return { left: p.x * (colW + gap), top: p.y * (rh + gap), width: p.w * colW + (p.w - 1) * gap, height: p.h * rh + (p.h - 1) * gap };
  }

  function placeEl(el, p) {
    const r = rectFor(p);
    Object.assign(el.style, { left: `${r.left}px`, top: `${r.top}px`, width: `${r.width}px`, height: `${r.height}px` });
  }

  function updateGridHeight(pos) {
    const rows = Object.values(pos).reduce((m, p) => Math.max(m, p.y + p.h), 0) + (editMode ? 4 : 0);
    gridEl.style.height = `${Math.max(rows * (metrics.rh + metrics.gap) - metrics.gap, 0)}px`;
    const cw = metrics.colW + metrics.gap, ch = metrics.rh + metrics.gap;
    const svg = `<svg xmlns='http://www.w3.org/2000/svg' width='${cw}' height='${ch}'><rect x='0.5' y='0.5' width='${Math.max(metrics.colW - 1, 0)}' height='${metrics.rh - 1}' rx='10' fill='rgba(127,127,127,0.06)' stroke='rgba(127,127,127,0.2)' stroke-dasharray='3 4'/></svg>`;
    gridEl.style.setProperty("--cell-bg", `url("data:image/svg+xml,${encodeURIComponent(svg)}")`);
    gridEl.style.backgroundSize = `${cw}px ${ch}px`;
  }

  /** Side menu with the dashboard's tabs (a bottom tab bar on phones). */
  function renderNav() {
    const show = current.nav.show || (editMode && current.tabs.length > 1);
    document.body.classList.toggle("has-tabs", show);
    navEl.hidden = !show;
    if (!show) return;
    const active = tab().id;
    // "icons": a slim rail; names appear as a tooltip on hover or keyboard focus.
    navEl.classList.toggle("icons", current.nav.style !== "labels");
    navEl.innerHTML = current.tabs.map((t) => `<button class="tabnav-item" data-tab="${t.id}" aria-label="${esc(t.name)}" ${t.id === active ? 'aria-current="page"' : ""}>
        <span class="tabnav-ico">${Icons.has(t.icon) ? Icons.svg(t.icon) : t.icon ? `<span class="glyph">${esc(t.icon)}</span>` : Icons.svg("tile")}</span><span class="tabnav-label">${esc(t.name)}</span></button>`).join("") +
      (editMode ? `<button class="tabnav-item add" data-tabop="add" aria-label="${tr("Add tab")}">${Icons.svg("plus")}<span class="tabnav-label">${tr("Add tab")}</span></button>` : "");
  }

  function setTab(id) {
    activeTabId = id;
    lsSet(`ds.tab.${current.id}`, id);
    selectedId = null;
    renderGrid();
    if (editMode) renderInspector();
    stageEl.scrollTop = 0;
  }

  function addTab() {
    const t = newTab(tr("Tab {0}", current.tabs.length + 1), "tile");
    mutate(() => { current.tabs.push(t); current.nav.show = true; }, null, { rerender: false });
    setTab(t.id);
  }

  async function tabOp(op, id) {
    const i = current.tabs.findIndex((t) => t.id === id);
    if (op === "add") return addTab();
    if (op === "up" || op === "down") {
      const j = op === "up" ? i - 1 : i + 1;
      if (j < 0 || j >= current.tabs.length) return;
      mutate(() => { [current.tabs[i], current.tabs[j]] = [current.tabs[j], current.tabs[i]]; });
      renderInspector();
    } else if (op === "del") {
      if (current.tabs.length === 1) { toast(tr("A dashboard needs at least one tab."), true); return; }
      const t = current.tabs[i];
      if (t.widgets.length && !(await confirmDestructive(tr("Delete tab “{0}”?", t.name), tr("Its {0} widgets will be deleted too. You can undo this with ⌘Z.", t.widgets.length), tr("Delete")))) return;
      mutate(() => { current.tabs.splice(i, 1); }, null, { rerender: false });
      setTab(current.tabs[Math.max(0, i - 1)].id);
    }
  }

  function renderGrid() {
    if (!current) return;
    renderNav();
    applyTheme();
    computeMetrics();
    const pos = positions();
    gridEl.innerHTML = "";
    lastVisible = {};
    for (const w of tab().widgets) {
      lastVisible[w.id] = isVisible(w);
      if (!pos[w.id]) continue;
      const el = document.createElement("div");
      el.className = "w";
      el.dataset.id = w.id;
      gridEl.appendChild(el);
      placeEl(el, pos[w.id]);
      renderWidget(w, el);
    }
    updateGridHeight(pos);
  }

  async function api(path) {
    const r = await fetch(new URL(path, BASE));
    if (!r.ok) throw new Error((await r.text().catch(() => "")) || `HTTP ${r.status}`);
    return r.json();
  }
  const ctxFor = (w) => ({ ha, w, api, cache: (caches[w.id] ||= {}) });

  function renderWidget(w, el = gridEl.querySelector(`.w[data-id="${w.id}"]`)) {
    if (!el) return;
    const def = Widgets[w.type];
    if (!def) { el.innerHTML = `<div class="w-body"><div class="empty">${tr("Unknown widget “{0}”.", esc(w.type))}</div></div>`; return; }
    const ctx = ctxFor(w);
    const st = w.style || {};
    const lit = def.lit?.(w.cfg, ctx) || false;
    el.classList.toggle("selected", editMode && w.id === selectedId);
    el.classList.toggle("transparent", !!st.transparent);
    el.classList.toggle("lit-lamp", lit === "lamp");
    el.classList.toggle("lit-on", lit === "on");
    const lamp = lit === "lamp" ? def.lamp?.(w.cfg, ctx) : null;
    for (const [prop, val] of [["--lamp", lamp], ["--w-bg", st.bg], ["--w-color", st.color], ["--w-accent", st.accent]]) {
      if (val) el.style.setProperty(prop, val); else el.style.removeProperty(prop);
    }
    let html;
    try { html = def.render(w.cfg, ctx); } catch (e) { console.error(e); html = `<div class="empty">${tr("This widget couldn’t be drawn.")}</div>`; }
    const hiddenNow = editMode && !isVisible(w);
    el.classList.toggle("cond-hidden", hiddenNow);
    el.innerHTML = `<div class="w-body ${def.flush ? "flush" : ""}">${html}</div>` +
      (hiddenNow ? `<div class="w-hidden">${Icons.svg("eye-off")}${tr("Hidden now")}</div>` : "") +
      (editMode ? `<div class="w-tools"><button data-tool="dup" aria-label="${tr("Duplicate")}" title="${tr("Duplicate")}">${Icons.svg("copy")}</button><button data-tool="del" class="del" aria-label="${tr("Delete")}" title="${tr("Delete")}">${Icons.svg("trash")}</button></div><div class="w-resize" aria-hidden="true"></div>` : "");
    if (editMode) el.querySelectorAll(".w-body button, .w-body input, .w-body iframe").forEach((n) => n.setAttribute("tabindex", "-1"));
    if (def.after) Promise.resolve(def.after(el, w.cfg, ctx)).catch(console.error);
  }

  function entitiesOf(w) {
    const def = Widgets[w.type];
    if (!def) return [];
    if (def.entities) return def.entities(w.cfg, ha);
    return w.cfg.entity ? [w.cfg.entity] : [];
  }

  let interacting = false;
  function onStateChange(entityId) {
    if (!current) return;
    if (entityId == null) { for (const c of Object.values(caches)) c.key = null; renderGrid(); if (editMode) renderInspector(); return; }
    const affected = tab().widgets.filter((w) => entitiesOf(w).includes(entityId) || ruleEntities(w).includes(entityId));
    if (affected.some((w) => isVisible(w) !== lastVisible[w.id])) { renderGrid(); return; }
    for (const w of affected) {
      const el = gridEl.querySelector(`.w[data-id="${w.id}"]`);
      if (interacting && el?.contains(document.activeElement)) continue; // don't yank a slider mid-drag
      const focused = el?.contains(document.activeElement) ? document.activeElement.dataset.act : null;
      renderWidget(w, el);
      if (focused) el.querySelector(`[data-act="${focused}"]`)?.focus();
    }
  }

  function renderDashSelect() {
    $("#dash-select").innerHTML = store.dashboards.map((d) => `<option value="${d.id}" ${d.id === current?.id ? "selected" : ""}>${esc(d.name)}</option>`).join("");
  }

  function renderPalette() {
    $("#palette-list").innerHTML = Object.entries(Widgets)
      .map(([type, d]) => `<button class="pal-item" data-add="${type}">${Icons.svg(d.icon)}<span>${esc(tr(d.label))}</span></button>`).join("");
  }

  function renderAll() {
    document.body.classList.toggle("editing", editMode);
    $("#btn-edit").textContent = editMode ? tr("Done") : tr("Edit");
    renderDashSelect();
    renderGrid();
    if (editMode) renderInspector();
  }

  // ------------------------------------------------------------ inspector
  function entityOptions(domains) {
    return Object.values(ha.states)
      .filter((s) => !domains || domains.includes(domainOf(s.entity_id)))
      .sort((a, b) => a.entity_id.localeCompare(b.entity_id))
      .map((s) => `<option value="${esc(s.entity_id)}">${esc(friendly(s))}</option>`).join("");
  }
  const listId = (domains) => `dl-${(domains || ["all"]).join("-")}`;

  function fieldHTML(f, value, path) {
    f = { ...f, l: tr(f.l), ph: f.ph ? tr(f.ph) : f.ph };
    const id = `f-${path}-${f.k}`;
    const data = `data-path="${path}" data-k="${f.k}"`;
    const label = `<label for="${id}">${esc(f.l)}</label>`;
    switch (f.t) {
      case "check":
        return `<div class="field check"><label><input type="checkbox" ${data} ${value ? "checked" : ""}> ${esc(f.l)}</label></div>`;
      case "seg":
        return `<div class="field"><span class="field-label" id="${id}">${esc(f.l)}</span><div class="seg" role="group" aria-labelledby="${id}">
          ${f.o.map((o) => `<button type="button" ${data} data-v="${esc(o)}" aria-pressed="${o === value}">${esc(optLabel(o))}</button>`).join("")}</div></div>`;
      case "select":
        return `<div class="field">${label}<select class="input" id="${id}" ${data}>${f.o.map((o) => `<option value="${esc(o)}" ${o === value ? "selected" : ""}>${esc(f.labels?.[o] ?? optLabel(o))}</option>`).join("")}</select></div>`;
      case "number":
        return `<div class="field">${label}<input class="input" id="${id}" type="number" step="any" ${data} data-num="1" value="${esc(value ?? "")}" placeholder="${esc(f.ph || "")}"></div>`;
      case "textarea":
      case "json":
        return `<div class="field">${label}<textarea class="input" id="${id}" ${data} ${f.t === "json" ? 'data-json="1" placeholder=\'{"brightness_pct": 50}\'' : ""}>${esc(value ?? "")}</textarea></div>`;
      case "color":
        return `<div class="field">${label}<div class="color-row">
          <input type="color" data-sync="${id}" value="${/^#[0-9a-f]{6}$/i.test(value || "") ? value : "#888888"}" aria-label="${esc(f.l)} picker">
          <input class="input" id="${id}" type="text" ${data} value="${esc(value ?? "")}" placeholder="${esc(f.ph || tr("Default"))}"></div></div>`;
      case "icon":
        return `<div class="field">${label}<div class="icon-row"><span class="icon-prev" aria-hidden="true">${value ? (Icons.has(value) ? Icons.svg(value) : esc(value)) : ""}</span>
          <input class="input" id="${id}" type="text" list="dl-icons" ${data} value="${esc(value ?? "")}" placeholder="${tr("Automatic")}" autocomplete="off"></div></div>`;
      case "entity": {
        const s = ha.states[value];
        return `<div class="field">${label}<input class="input" id="${id}" type="text" list="${listId(f.domains)}" ${data} value="${esc(value ?? "")}" placeholder="${f.domains ? f.domains[0] + "." : "domain."}…" autocomplete="off" spellcheck="false">
          ${s ? `<div class="ent-hint">${esc(friendly(s))} · ${esc(fmtState(s))}</div>` : value ? `<div class="ent-hint" style="color:var(--crit)">${tr("No entity with this ID")}</div>` : ""}</div>`;
      }
      case "entities": {
        const lid = listId(f.domains);
        const list = Array.isArray(value) ? value : [];
        return `<div class="field"><span class="field-label">${esc(f.l)}</span>
          ${list.map((e, i) => `<div class="ent-item"><input class="input" type="text" list="${lid}" ${data} data-idx="${i}" value="${esc(e)}" autocomplete="off" spellcheck="false" aria-label="${esc(f.l)} ${i + 1}"><button class="btn icon" data-ent-del="${i}" ${data} aria-label="${esc(tr("Remove {0}", e))}">${Icons.svg("close")}</button></div>`).join("")}
          <input class="input" type="text" list="${lid}" ${data} data-idx="new" placeholder="${tr("Add an entity…")}" autocomplete="off" spellcheck="false" aria-label="Add to ${esc(f.l)}"></div>`;
      }
      case "albums":
        return `<div class="field"><span class="field-label">${esc(f.l)}</span><div class="albums" ${data} data-selected="${esc(JSON.stringify(value || []))}"><div class="muted small">${tr("Loading albums…")}</div></div></div>`;
      default:
        return `<div class="field">${label}<input class="input" id="${id}" type="text" ${data} value="${esc(value ?? "")}" placeholder="${esc(f.ph || "")}"></div>`;
    }
  }

  function datalists() {
    const groups = new Set(["all"]);
    for (const d of Object.values(Widgets)) for (const f of d.fields) if (f.domains) groups.add(f.domains.join("-"));
    return [...groups].map((g) => `<datalist id="dl-${g}">${entityOptions(g === "all" ? null : g.split("-"))}</datalist>`).join("") +
      `<datalist id="dl-icons">${Icons.names.map((n) => `<option value="${n}">`).join("")}</datalist>`;
  }

  const STYLE_FIELDS = [
    { k: "transparent", t: "check", l: "No background" },
    { k: "bg", t: "color", l: "Background", ph: "Theme" },
    { k: "color", t: "color", l: "Text color", ph: "Theme" },
    { k: "accent", t: "color", l: "Accent color", ph: "Theme" },
  ];
  const COLOR_FIELDS = [
    { k: "bg", t: "color", l: "Background (color or CSS gradient)" },
    { k: "tile", t: "color", l: "Tile color" },
    { k: "text", t: "color", l: "Text color" },
    { k: "text2", t: "color", l: "Secondary text color" },
    { k: "accent", t: "color", l: "Accent color" },
  ];
  const GRID_FIELDS = [
    { k: "cols", t: "number", l: "Columns" },
    { k: "rowHeight", t: "number", l: "Row height (px)" },
    { k: "gap", t: "number", l: "Spacing (px)" },
    { k: "maxWidth", t: "number", l: "Maximum width (px)", ph: "0 = full width" },
  ];

  function renderInspector() {
    const el = $("#inspector");
    const w = tab().widgets.find((x) => x.id === selectedId);
    if (w) {
      const def = Widgets[w.type];
      el.innerHTML = `${datalists()}<div class="panel-title">${Icons.svg(def.icon)} ${esc(tr(def.label))}</div>
        ${def.fields.filter((f) => !f.when || f.when(w.cfg)).map((f) => fieldHTML(f, w.cfg[f.k], "cfg")).join("")}
        <div class="section"><div class="section-title">${tr("Size and position")}</div>
          <div class="row">${[["x", "Column"], ["y", "Row"], ["w", "Width"], ["h", "Height"]].map(([k, l]) => `<div class="field"><label for="pos-${k}">${tr(l)}</label><input class="input" id="pos-${k}" type="number" min="${k === "w" || k === "h" ? 1 : 0}" data-path="pos" data-k="${k}" data-num="1" value="${w[k]}"></div>`).join("")}</div></div>
        ${current.tabs.length > 1 ? fieldHTML({ k: "tab", t: "select", l: "Tab", o: current.tabs.map((t) => t.id), labels: Object.fromEntries(current.tabs.map((t) => [t.id, t.name])) }, tab().id, "move") : ""}
        <div class="section"><div class="section-title">${tr("Style")}</div>${STYLE_FIELDS.map((f) => fieldHTML(f, w.style?.[f.k], "style")).join("")}</div>
        ${visibilityHTML(w)}
        <div class="insp-actions"><button class="btn" data-tool="dup">${Icons.svg("copy")}${tr("Duplicate")}</button><button class="btn danger" data-tool="del">${Icons.svg("trash")}${tr("Delete")}</button></div>`;
      fillAlbums(el);
      return;
    }
    const t = current.theme, k = current.kiosk;
    el.innerHTML = `<div class="panel-title">${tr("Dashboard")}</div>
      ${fieldHTML({ k: "name", t: "text", l: "Name" }, current.name, "dash")}
      <datalist id="dl-icons">${Icons.names.map((n) => `<option value="${n}">`).join("")}</datalist>
      <div class="section"><div class="section-title">${tr("Tabs")}</div>
        ${fieldHTML({ k: "show", t: "check", l: "Show tabs in a side menu" }, current.nav.show, "nav")}
        ${fieldHTML({ k: "style", t: "seg", l: "Menu style", o: ["icons", "labels"] }, current.nav.style || "icons", "nav")}
        <div class="tab-list">${current.tabs.map((t, i) => `<div class="tab-item">
          <span class="icon-prev" aria-hidden="true">${Icons.has(t.icon) ? Icons.svg(t.icon) : esc(t.icon || "")}</span>
          <input class="input" type="text" data-path="tab" data-tab="${t.id}" data-k="name" value="${esc(t.name)}" aria-label="${tr("Tab name")}">
          <input class="input tab-icon" type="text" list="dl-icons" data-path="tab" data-tab="${t.id}" data-k="icon" value="${esc(t.icon || "")}" placeholder="${tr("Icon")}" aria-label="${tr("Icon")}" autocomplete="off">
          <button class="btn icon" data-tabop="up" data-tab-id="${t.id}" aria-label="${tr("Move up")}" ${i === 0 ? "disabled" : ""}>${Icons.svg("chevron", "flip")}</button>
          <button class="btn icon" data-tabop="down" data-tab-id="${t.id}" aria-label="${tr("Move down")}" ${i === current.tabs.length - 1 ? "disabled" : ""}>${Icons.svg("chevron")}</button>
          <button class="btn icon danger" data-tabop="del" data-tab-id="${t.id}" aria-label="${esc(tr("Delete tab “{0}”?", t.name))}">${Icons.svg("trash")}</button>
        </div>`).join("")}</div>
        <button class="btn" data-tabop="add" style="width:100%;margin-top:6px">${Icons.svg("plus")}${tr("Add tab")}</button>
      </div>
      <div class="section"><div class="section-title">${tr("Appearance")}</div>
        <div class="presets" role="group" aria-label="${tr("Theme")}">${Object.entries(PRESETS).map(([n, p]) => {
          const bg = p.swatch ? `linear-gradient(135deg, ${p.swatch[0]} 50%, ${p.swatch[1]} 50%)` : p.bg;
          const fg = p.swatch ? "#6e6e73" : p.text;
          return `<button class="preset" data-preset="${n}" aria-pressed="${t.preset === n}" style="background:${bg};color:${fg}"><i style="background:${p.accent || "#0a84ff"}"></i><span>${tr(n)}</span></button>`;
        }).join("")}</div>
        <p class="muted small" style="margin:8px 2px 0">${tr("System follows your device’s light or dark appearance.")}</p>
        <div style="height:12px"></div>
        ${fieldHTML({ k: "surface", t: "seg", l: "Tile style", o: ["cards", "outline", "plain"] }, t.surface, "theme")}
        ${fieldHTML({ k: "radius", t: "number", l: "Corner radius (px)" }, t.radius, "theme")}
      </div>
      <div class="section"><div class="section-title">${tr("Colors")}${t.preset !== "Custom" ? ` <span style="font-weight:400">· ${tr("editing switches to Custom")}</span>` : ""}</div>
        ${COLOR_FIELDS.map((f) => fieldHTML(f, t.preset === "System" ? "" : t[f.k], "theme")).join("")}
        ${fieldHTML({ k: "bgImage", t: "text", l: "Background image URL", ph: "/local/wallpaper.jpg" }, t.bgImage, "theme")}
        ${fieldHTML({ k: "blur", t: "number", l: "Blur behind tiles (px)", ph: "For photo backgrounds" }, t.blur, "theme")}
      </div>
      <div class="section"><div class="section-title">${tr("Grid")}</div>
        <div class="row">${GRID_FIELDS.slice(0, 2).map((f) => fieldHTML(f, current.grid[f.k], "grid")).join("")}</div>
        <div class="row">${GRID_FIELDS.slice(2).map((f) => fieldHTML(f, current.grid[f.k], "grid")).join("")}</div></div>
      <div class="section"><div class="section-title">${tr("Kiosk")}</div>
        ${fieldHTML({ k: "saver", t: "number", l: "Screen saver after (minutes)", ph: "0 = off" }, k.saver, "kiosk")}
        ${fieldHTML({ k: "exitCorner", t: "select", l: "Exit corner (tap it 5 times to leave)", o: ["top-right", "top-left", "bottom-right", "bottom-left"] }, k.exitCorner, "kiosk")}
        ${fieldHTML({ k: "hideCursor", t: "check", l: "Hide the pointer when idle" }, k.hideCursor, "kiosk")}
        <div class="insp-actions"><button class="btn" data-kiosk="here">${Icons.svg("kiosk")}${tr("Start kiosk")}</button><button class="btn" data-kiosk="tab">${Icons.svg("exit")}${tr("New tab")}</button></div>
        <p class="muted small" style="margin:8px 2px 0">${tr("On a wall tablet, open kiosk in a new tab to hide the Home Assistant sidebar too.")}</p>
      </div>
      <div class="section"><div class="section-title">${tr("Language")}</div>
        ${fieldHTML({ k: "lang", t: "select", l: "Language on this device", o: Object.keys(window.I18n.languages), labels: Object.fromEntries(Object.entries(window.I18n.languages).map(([c, n]) => [c, c === "auto" ? tr(n) : n])) }, window.I18n.preference(), "device")}
      </div>
      <div class="section"><div class="section-title">${tr("About")}</div>
        <div class="about"><img src="static/favicon.png?v=${esc(APP_VERSION)}" alt="" width="40" height="40">
          <div><div style="font-weight:600">Dashboard Studio</div><div class="muted small">${tr("Version {0}", esc(APP_VERSION))}</div></div></div>
        <a class="btn" href="${REPO_URL}" target="_blank" rel="noopener" style="width:100%;margin-top:10px;text-decoration:none">${Icons.svg("globe")}${tr("Source code and changes")}</a>
      </div>
      <p class="hint">${tr("Select a widget to edit it.")}</p>`;
  }

  /** Album pickers load their list from the server after the inspector is drawn. */
  async function fillAlbums(root) {
    for (const box of root.querySelectorAll(".albums")) {
      const selected = new Set(JSON.parse(box.dataset.selected || "[]"));
      try {
        const albums = await api("api/immich/albums");
        if (!box.isConnected) return;
        box.innerHTML = albums.length
          ? albums.map((a) => `<label class="album"><input type="checkbox" value="${esc(a.id)}" ${selected.has(a.id) ? "checked" : ""}><span class="grow">${esc(a.name)}</span><span class="muted small">${a.count}</span></label>`).join("")
          : `<div class="muted small">${tr("No albums found in Immich.")}</div>`;
      } catch (e) {
        box.innerHTML = `<div class="small" style="color:var(--crit)">${esc(e.message)}</div>`;
      }
    }
  }

  function visibilityHTML(w) {
    const vis = w.visibility || { mode: "all", rules: [] };
    const common = ["on", "off", "running", "idle", "playing", "paused", "home", "not_home", "unavailable"];
    const rows = vis.rules.map((r, i) => {
      const s = ha.states[r.entity];
      const opts = [...new Set([s?.state, ...common].filter(Boolean))].map((o) => `<option value="${esc(o)}">`).join("");
      return `<div class="rule">
        <input class="input" type="text" list="dl-all" data-path="rule" data-idx="${i}" data-k="entity" value="${esc(r.entity || "")}" placeholder="${tr("Entity")}" aria-label="${tr("Entity")}" autocomplete="off" spellcheck="false">
        <div class="rule-row">
          <select class="input" data-path="rule" data-idx="${i}" data-k="op" aria-label="${tr("Condition")}">${["is", "is not", "above", "below"].map((o) => `<option value="${o}" ${o === (r.op || "is") ? "selected" : ""}>${esc(optLabel(o))}</option>`).join("")}</select>
          <input class="input" type="text" list="dl-rule-${i}" data-path="rule" data-idx="${i}" data-k="value" value="${esc(r.value ?? "")}" placeholder="${tr("Value")}" aria-label="${tr("Value")}" autocomplete="off">
          <datalist id="dl-rule-${i}">${opts}</datalist>
          <button class="btn icon" data-rule-del="${i}" aria-label="${tr("Remove condition")}">${Icons.svg("close")}</button>
        </div>
        ${s ? `<div class="ent-hint">${tr("Now")}: ${esc(s.state)}</div>` : ""}
      </div>`;
    }).join("");
    const status = vis.rules.some((r) => r.entity) || Widgets[w.type]?.autoHide
      ? `<p class="small vis-status">${isVisible(w) ? Icons.svg("eye") + tr("Visible right now") : Icons.svg("eye-off") + tr("Hidden right now")}</p>` : "";
    return `<div class="section"><div class="section-title">${tr("Visibility")}</div>
      <p class="muted small" style="margin:0 2px 10px">${tr("Show this widget only when the conditions below are met. Leave empty to always show it.")}</p>
      ${vis.rules.length > 1 ? fieldHTML({ k: "mode", t: "seg", l: "Show when", o: ["all", "any"] }, vis.mode || "all", "vis") : ""}
      ${rows}${status}
      <button class="btn" data-rule-add style="width:100%">${Icons.svg("plus")}${tr("Add condition")}</button></div>`;
  }

  function applyField(t, v, isChange) {
    const path = t.dataset.path, k = t.dataset.k, idx = t.dataset.idx;
    if (path === "tab") {
      const tb = current.tabs.find((x) => x.id === t.dataset.tab);
      mutate(() => { tb[k] = v; }, `tab|${tb.id}|${k}`, { rerender: false });
      renderNav();
      if (isChange && k === "icon") renderInspector();
      return;
    }
    if (path === "vis" || path === "rule") {
      const w = tab().widgets.find((x) => x.id === selectedId);
      mutate(() => {
        w.visibility ||= { mode: "all", rules: [] };
        if (path === "vis") w.visibility[k] = v;
        else w.visibility.rules[Number(t.dataset.idx)][k] = v;
      }, `${w.id}|${path}|${t.dataset.idx}|${k}`);
      if (isChange || t.tagName === "BUTTON") renderInspector();
      return;
    }
    if (path === "nav") {
      mutate(() => { current.nav[k] = v; });
      return;
    }
    if (path === "move") {
      const w = tab().widgets.find((x) => x.id === selectedId), target = current.tabs.find((x) => x.id === v);
      if (!w || !target || target === tab()) return;
      mutate(() => {
        tab().widgets = tab().widgets.filter((x) => x !== w);
        Object.assign(w, findSpot(w.w, w.h, target.widgets));
        target.widgets.push(w);
      });
      select(null);
      toast(tr("Moved to “{0}”.", target.name));
      return;
    }
    if (path === "device") { // per-device language: stored locally, applied by reloading
      lsSet("ds.lang", v);
      location.reload();
      return;
    }
    const w = tab().widgets.find((x) => x.id === selectedId);
    const key = `${selectedId}|${path}|${k}|${idx ?? ""}`;

    if (idx === "new") {
      if (!isChange || !v) return;
      mutate(() => { (w.cfg[k] ||= []).push(v); }, null);
      renderInspector();
      $(`#inspector [data-k="${k}"][data-idx="new"]`)?.focus();
      return;
    }
    if (t.dataset.json && v) {
      try { JSON.parse(v); t.classList.remove("invalid"); } catch { t.classList.add("invalid"); return; }
    }

    mutate(() => {
      if (path === "cfg") {
        if (idx != null) w.cfg[k][Number(idx)] = v;
        else w.cfg[k] = v;
      } else if (path === "style") { (w.style ||= {})[k] = v; }
      else if (path === "pos") {
        const n = Math.max(k === "w" || k === "h" ? 1 : 0, Math.round(Number(v) || 0));
        w[k] = k === "x" || k === "w" ? Math.min(n, current.grid.cols - (k === "x" ? w.w : w.x)) : n;
        resolveCollisions(w);
      } else if (path === "theme") {
        const th = current.theme;
        if (COLOR_KEYS.includes(k) && th.preset !== "Custom") {
          if (th.preset === "System") Object.assign(th, PRESETS[prefersDark() ? "Dark" : "Light"]);
          th.preset = "Custom";
        }
        th[k] = v;
      } else if (path === "grid") { current.grid[k] = v === "" ? 0 : v; }
      else if (path === "kiosk") { current.kiosk[k] = v; }
      else if (path === "dash") { current.name = v; renderDashSelect(); }
    }, key, { rerender: ["pos", "theme", "grid"].includes(path) });

    if (path === "cfg" || path === "style") renderWidget(w);
    const fieldType = w && Widgets[w.type].fields.find((f) => f.k === k)?.t;
    if (isChange && (fieldType === "entity" || fieldType === "icon" || idx != null || t.tagName === "BUTTON")) renderInspector();
    if (path === "theme" && (t.tagName === "BUTTON" || (isChange && COLOR_KEYS.includes(k)))) renderInspector();
  }

  function onInspectorInput(e) {
    const t = e.target;
    const albums = t.closest?.(".albums");
    if (albums) {
      if (e.type !== "change") return;
      const ids = [...albums.querySelectorAll("input:checked")].map((i) => i.value);
      applyField({ dataset: { path: "cfg", k: "albums" }, tagName: "DIV", classList: { add() {}, remove() {} } }, ids, false);
      return;
    }
    if (t.dataset.sync) { // color swatch -> text field
      const txt = document.getElementById(t.dataset.sync);
      txt.value = t.value;
      applyField(txt, t.value, e.type === "change");
      return;
    }
    if (!t.dataset.path) return;
    let v = t.type === "checkbox" ? t.checked : t.value;
    if (t.dataset.num) v = v === "" ? "" : Number(v);
    applyField(t, v, e.type === "change");
  }

  // ------------------------------------------------------------ layout ops
  const overlap = (a, b) => a.x < b.x + b.w && b.x < a.x + a.w && a.y < b.y + b.h && b.y < a.y + a.h;

  // Push anything overlapping `moved` downward, cascading.
  function resolveCollisions(moved) {
    const queue = [moved];
    let guard = 0;
    while (queue.length && guard++ < 2000) {
      const a = queue.shift();
      for (const b of tab().widgets) {
        if (b !== a && overlap(a, b)) { b.y = a.y + a.h; queue.push(b); }
      }
    }
  }

  function findSpot(w, h, widgets = tab().widgets) {
    const cols = current.grid.cols;
    for (let y = 0; y < 500; y++)
      for (let x = 0; x + w <= cols; x++)
        if (!widgets.some((o) => overlap({ x, y, w, h }, o))) return { x, y };
    return { x: 0, y: 0 };
  }

  function addWidget(type) {
    const wd = makeWidget(type);
    wd.w = Math.min(wd.w, current.grid.cols);
    Object.assign(wd, findSpot(wd.w, wd.h));
    mutate(() => tab().widgets.push(wd));
    select(wd.id);
    gridEl.querySelector(`.w[data-id="${wd.id}"]`)?.scrollIntoView({ block: "nearest", behavior: "smooth" });
  }

  function duplicate(id) {
    const src = tab().widgets.find((w) => w.id === id);
    if (!src) return;
    const copy = { ...clone(src), id: uid() };
    Object.assign(copy, findSpot(copy.w, copy.h));
    mutate(() => tab().widgets.push(copy));
    select(copy.id);
  }

  function remove(id) {
    mutate(() => { tab().widgets = tab().widgets.filter((w) => w.id !== id); });
    delete caches[id];
    select(null);
    toast(tr("Widget deleted. Press ⌘Z to undo."));
  }

  function select(id) {
    selectedId = id;
    gridEl.querySelectorAll(".w").forEach((el) => el.classList.toggle("selected", el.dataset.id === id));
    renderInspector();
  }

  // ------------------------------------------------------------ drag / resize
  let drag = null;

  gridEl.addEventListener("pointerdown", (e) => {
    if (!editMode || e.button !== 0) return;
    const el = e.target.closest(".w");
    if (!el) { select(null); return; }
    if (e.target.closest("[data-tool]")) return;
    const w = tab().widgets.find((x) => x.id === el.dataset.id);
    if (selectedId !== w.id) select(w.id);
    const mode = e.target.closest(".w-resize") ? "resize" : "move";
    const ph = document.createElement("div");
    ph.className = "placeholder";
    gridEl.appendChild(ph);
    placeEl(ph, w);
    drag = { w, el, ph, mode, sx: e.clientX, sy: e.clientY, orig: { x: w.x, y: w.y, w: w.w, h: w.h }, next: { x: w.x, y: w.y, w: w.w, h: w.h }, r0: rectFor(w) };
    el.classList.add("dragging");
    el.setPointerCapture(e.pointerId);
    e.preventDefault();
  });

  gridEl.addEventListener("pointermove", (e) => {
    if (!drag) return;
    const { colW, gap, rh, cols } = metrics;
    const dx = e.clientX - drag.sx, dy = e.clientY - drag.sy;
    const o = drag.orig, n = drag.next;
    if (drag.mode === "move") {
      drag.el.style.left = `${drag.r0.left + dx}px`;
      drag.el.style.top = `${drag.r0.top + dy}px`;
      n.x = Math.max(0, Math.min(cols - o.w, o.x + Math.round(dx / (colW + gap))));
      n.y = Math.max(0, o.y + Math.round(dy / (rh + gap)));
    } else {
      drag.el.style.width = `${Math.max(colW, drag.r0.width + dx)}px`;
      drag.el.style.height = `${Math.max(rh, drag.r0.height + dy)}px`;
      n.w = Math.max(1, Math.min(cols - o.x, o.w + Math.round(dx / (colW + gap))));
      n.h = Math.max(1, o.h + Math.round(dy / (rh + gap)));
    }
    placeEl(drag.ph, n);
    const pos = positions(); pos[drag.w.id] = n;
    updateGridHeight(pos);
  });

  function endDrag() {
    if (!drag) return;
    const { w, ph, el, orig, next } = drag;
    ph.remove();
    el.classList.remove("dragging");
    drag = null;
    if (orig.x === next.x && orig.y === next.y && orig.w === next.w && orig.h === next.h) { placeEl(el, w); return; }
    mutate(() => { Object.assign(w, next); resolveCollisions(w); });
    select(w.id);
  }
  gridEl.addEventListener("pointerup", endDrag);
  gridEl.addEventListener("pointercancel", endDrag);

  // ------------------------------------------------------------ actions (view mode)
  function defaultAction(eid) {
    const d = domainOf(eid), s = ha.states[eid];
    switch (d) {
      case "scene": case "script": return ha.callService(d, "turn_on", {}, eid);
      case "button": case "input_button": return ha.callService(d, "press", {}, eid);
      case "lock": return ha.callService("lock", s?.state === "locked" ? "unlock" : "lock", {}, eid);
      case "cover": return ha.callService("cover", "toggle", {}, eid);
      case "media_player": return ha.callService("media_player", "media_play_pause", {}, eid);
      case "climate": return ha.callService("climate", s?.state === "off" ? "turn_on" : "turn_off", {}, eid);
      default: return ha.callService("homeassistant", "toggle", {}, eid);
    }
  }

  gridEl.addEventListener("click", (e) => {
    if (editMode) {
      const tool = e.target.closest("[data-tool]");
      if (tool) {
        const id = tool.closest(".w").dataset.id;
        tool.dataset.tool === "dup" ? duplicate(id) : remove(id);
      }
      return;
    }
    const a = e.target.closest("[data-act]");
    if (!a || a.tagName === "INPUT") return;
    const eid = a.dataset.e, act = a.dataset.act;
    if (act === "toggle") defaultAction(eid);
    else if (act === "more") moreInfo(eid);
    else if (act === "temp") {
      const s = ha.states[eid];
      const t = Math.round(((s?.attributes.temperature ?? 20) + Number(a.dataset.v)) * 10) / 10;
      ha.callService("climate", "set_temperature", { temperature: t }, eid);
    } else if (act === "hvac") ha.callService("climate", "set_hvac_mode", { hvac_mode: a.dataset.v }, eid);
    else if (act === "mp-select") {
      const w = tab().widgets.find((x) => x.id === a.closest(".w").dataset.id);
      caches[w.id].sel = a.dataset.v;
      renderWidget(w);
      gridEl.querySelector(`.w[data-id="${w.id}"] [data-act="mp-select"][data-v="${a.dataset.v}"]`)?.focus();
    }
    else if (act === "svc") { const [d, s] = a.dataset.v.split("."); ha.callService(d, s, {}, eid); }
    else if (act === "button") {
      const c = tab().widgets.find((x) => x.id === a.closest(".w").dataset.id).cfg;
      let data = {};
      if (c.data) { try { data = JSON.parse(c.data); } catch { toast(tr("The button’s action data isn’t valid JSON. Fix it in the inspector."), true); return; } }
      if (c.service && c.service.includes(".")) { const [d, s] = c.service.split("."); ha.callService(d, s, data, c.entity || undefined); }
      else if (c.entity) defaultAction(c.entity);
      else { toast(tr("This button has no action yet. Set one in the inspector."), true); return; }
      a.animate?.([{ transform: "scale(.96)" }, { transform: "scale(1)" }], 160);
    }
  });

  gridEl.addEventListener("input", (e) => {
    const t = e.target;
    if (!t.dataset.act) return;
    interacting = true;
    t.style.setProperty("--pct", `${t.value}%`);
  });
  gridEl.addEventListener("change", (e) => {
    const t = e.target, eid = t.dataset.e;
    interacting = false;
    if (t.dataset.act === "brightness") ha.callService("light", "turn_on", { brightness_pct: Number(t.value) }, eid);
    if (t.dataset.act === "volume") ha.callService("media_player", "volume_set", { volume_level: Number(t.value) / 100 }, eid);
  });

  // ------------------------------------------------------------ dialogs
  let modalClose = null;
  function openModal(html, onClick) {
    const card = $("#modal .modal-card");
    card.innerHTML = html;
    $("#modal").hidden = false;
    const prevFocus = document.activeElement;
    return new Promise((resolve) => {
      modalClose = (result) => {
        $("#modal").hidden = true;
        modalClose = null;
        prevFocus?.focus?.();
        resolve(result);
      };
      card.onclick = (e) => onClick?.(e, modalClose);
      (card.querySelector("[autofocus]") || card.querySelector("button"))?.focus();
    });
  }
  $("#modal").addEventListener("click", (e) => { if (e.target.id === "modal") modalClose?.(null); });

  /** A short sheet with a text field. Resolves to the text, or null when cancelled. */
  function askText(title, value, confirmLabel) {
    return openModal(`<h3>${esc(title)}</h3>
      <form id="ask-form"><input class="input" id="ask-input" type="text" value="${esc(value)}" autofocus style="margin-top:12px">
      <div class="modal-actions"><button type="button" class="btn" data-x="cancel">${tr("Cancel")}</button><button type="submit" class="btn primary">${esc(confirmLabel)}</button></div></form>`,
      (e, close) => { if (e.target.dataset.x === "cancel") close(null); });
  }
  document.addEventListener("submit", (e) => {
    if (e.target.id !== "ask-form") return;
    e.preventDefault();
    const v = $("#ask-input").value.trim();
    if (v) modalClose?.(v);
  });

  function confirmDestructive(title, message, label) {
    return openModal(`<h3>${esc(title)}</h3><p>${esc(message)}</p>
      <div class="modal-actions"><button class="btn" data-x="cancel" autofocus>${tr("Cancel")}</button><button class="btn danger-fill" data-x="ok">${esc(label)}</button></div>`,
      (e, close) => { const x = e.target.closest("[data-x]")?.dataset.x; if (x) close(x === "ok"); });
  }

  function moreInfo(eid) {
    const s = ha.states[eid];
    if (!s) return;
    const toggle = window.HAFmt.TOGGLE_DOMAINS.has(domainOf(eid));
    const actionLabel = domainOf(eid) === "lock" ? (s.state === "locked" ? tr("Unlock") : tr("Lock")) : ["scene", "script"].includes(domainOf(eid)) ? tr("Run") : isOn(s) ? tr("Turn off") : tr("Turn on");
    openModal(`<h3>${esc(friendly(s))}</h3><div class="muted small">${esc(eid)}</div>
      <div class="num" style="font-size:34px;font-weight:700;margin:14px 0 2px">${esc(fmtState(s))}</div>
      <div class="muted small">${esc(tr("Changed {0}", relTime(s.last_changed)))}</div>
      <table class="attr-table">${Object.entries(s.attributes).map(([k, v]) => `<tr><td>${esc(cap(k))}</td><td>${esc(typeof v === "object" ? JSON.stringify(v) : v)}</td></tr>`).join("")}</table>
      <div class="modal-actions"><button class="btn" data-x="close">${tr("Close")}</button>${toggle ? `<button class="btn primary" data-x="toggle">${actionLabel}</button>` : ""}</div>`,
      (e, close) => {
        const x = e.target.closest("[data-x]")?.dataset.x;
        if (x === "toggle") defaultAction(eid);
        if (x) close();
      });
  }

  function toast(msg, err) {
    const el = document.createElement("div");
    el.className = "toast" + (err ? " err" : "");
    el.textContent = msg;
    $("#toasts").appendChild(el);
    setTimeout(() => el.remove(), err ? 6000 : 3500);
  }

  // ------------------------------------------------------------ kiosk
  // No visible controls. Tapping one screen corner 5 times quickly opens a
  // short-lived exit prompt; Escape does the same on a keyboard.
  const CORNER_PX = 90, CORNER_TAPS = 5, CORNER_WINDOW_MS = 2500, PROMPT_MS = 8000;
  let kiosk = false, swallowClick = false, wakeLock = null, idleTimer = 0, saverTimer = 0;
  let cornerTaps = [], promptOpen = false;

  async function requestWakeLock() {
    try { wakeLock = await navigator.wakeLock?.request("screen"); } catch { wakeLock = null; }
  }

  const cornerName = () => (current.kiosk.exitCorner || "top-right").replace("-", " ");

  function enterKiosk({ fullscreen = true } = {}) {
    if (editMode) setEdit(false);
    kiosk = true;
    document.body.classList.add("kiosk");
    if (fullscreen) toggleFullscreen(true);
    requestWakeLock();
    history.replaceState(null, "", `#kiosk&view=${current.id}`);
    renderGrid();
    poke();
    toast(tr("Kiosk mode is on. To leave, tap the {0} corner {1} times.", tr(cornerName()), CORNER_TAPS));
  }

  function exitKiosk() {
    kiosk = false;
    document.body.classList.remove("kiosk", "idle");
    $("#saver").hidden = true;
    clearTimeout(idleTimer); clearTimeout(saverTimer);
    wakeLock?.release?.(); wakeLock = null;
    if (document.fullscreenElement) document.exitFullscreen?.();
    history.replaceState(null, "", location.pathname);
    renderGrid();
  }

  function toggleFullscreen(quiet) {
    if (document.fullscreenElement) { document.exitFullscreen?.(); return; }
    const p = document.documentElement.requestFullscreen?.();
    if (!p) { if (!quiet) toast(tr("Full screen isn’t available in this browser."), true); return; }
    p.catch(() => { if (!quiet) toast(tr("Home Assistant’s frame blocks full screen. Use “New tab” in the kiosk settings instead."), true); });
  }

  /** The exit prompt closes itself if nobody answers, so the screen goes back to the dashboard. */
  async function kioskPrompt() {
    if (promptOpen || modalClose) return;
    promptOpen = true;
    const timer = setTimeout(() => modalClose?.(null), PROMPT_MS);
    const choice = await openModal(`<h3>${tr("Leave kiosk mode?")}</h3><p>${tr("This closes by itself in a few seconds.")}</p>
      <div class="modal-actions"><button class="btn" data-x="full">${document.fullscreenElement ? tr("Exit full screen") : tr("Full screen")}</button><button class="btn" data-x="stay" autofocus>${tr("Stay")}</button><button class="btn primary" data-x="exit">${tr("Leave kiosk")}</button></div>`,
      (e, close) => { const x = e.target.closest("[data-x]")?.dataset.x; if (x) close(x); });
    clearTimeout(timer);
    promptOpen = false;
    if (choice === "exit") exitKiosk();
    else if (choice === "full") toggleFullscreen(false);
  }

  function inExitCorner(e) {
    const c = current.kiosk.exitCorner || "top-right";
    const x = c.endsWith("left") ? e.clientX : window.innerWidth - e.clientX;
    const y = c.startsWith("top") ? e.clientY : window.innerHeight - e.clientY;
    return x < CORNER_PX && y < CORNER_PX;
  }

  /** Any activity: wake from the screen saver, count corner taps, reset idle timers. */
  function poke(e) {
    if (!kiosk) return;
    if (!$("#saver").hidden) {
      $("#saver").hidden = true;
      if (e?.type === "pointerdown") swallowClick = true; // the waking tap shouldn't also press a tile
    } else if (e?.type === "pointerdown" && !modalClose && inExitCorner(e)) {
      swallowClick = true; // corner taps never press whatever widget sits there
      const now = Date.now();
      cornerTaps = [...cornerTaps.filter((t) => now - t < CORNER_WINDOW_MS), now];
      if (cornerTaps.length >= CORNER_TAPS) { cornerTaps = []; kioskPrompt(); }
    }
    document.body.classList.remove("idle");
    clearTimeout(idleTimer);
    if (current.kiosk.hideCursor) idleTimer = setTimeout(() => document.body.classList.add("idle"), 3000);
    clearTimeout(saverTimer);
    const mins = Number(current.kiosk.saver) || 0;
    if (mins > 0) saverTimer = setTimeout(showSaver, mins * 60000);
  }

  function showSaver() {
    if (!kiosk || modalClose) return;
    updateSaver();
    $("#saver").hidden = false;
  }
  function updateSaver() {
    const d = new Date();
    $("#saver .time").textContent = d.toLocaleTimeString(LOCALE, { hour: "2-digit", minute: "2-digit" });
    $("#saver .date").textContent = d.toLocaleDateString(LOCALE, { weekday: "long", day: "numeric", month: "long" });
  }

  for (const ev of ["pointerdown", "pointermove", "keydown", "wheel"]) document.addEventListener(ev, poke, { capture: true, passive: true });
  document.addEventListener("click", (e) => { if (swallowClick) { swallowClick = false; e.stopPropagation(); e.preventDefault(); } }, true);
  document.addEventListener("visibilitychange", () => { if (kiosk && document.visibilityState === "visible") requestWakeLock(); });

  // ------------------------------------------------------------ chrome wiring
  function setCurrent(id) {
    current = store.dashboards.find((d) => d.id === id) || store.dashboards[0];
    lsSet("ds.current", current.id);
    activeTabId = lsGet(`ds.tab.${current.id}`);
    undoStack.length = redoStack.length = 0;
    selectedId = null;
    updateUndoButtons();
    renderAll();
  }

  function setEdit(on) {
    editMode = on;
    lsSet("ds.edit", on ? "1" : "0");
    if (!on) selectedId = null;
    renderAll();
  }

  function setMenu(open) {
    $("#menu").hidden = !open;
    $("#btn-menu").setAttribute("aria-expanded", String(open));
    if (open) $("#menu button")?.focus();
  }

  $("#btn-edit").onclick = () => setEdit(!editMode);
  $("#btn-kiosk").onclick = () => enterKiosk();
  $("#btn-undo").onclick = undo;
  $("#btn-redo").onclick = redo;
  $("#dash-select").onchange = (e) => setCurrent(e.target.value);
  $("#btn-new").onclick = async () => {
    const name = await askText(tr("New dashboard"), tr("New dashboard"), tr("Create"));
    if (!name) return;
    const d = newDashboard(name);
    store.dashboards.push(d);
    scheduleSave();
    setCurrent(d.id);
    setEdit(true);
  };
  $("#btn-menu").onclick = (e) => { e.stopPropagation(); setMenu($("#menu").hidden); };
  document.addEventListener("click", (e) => { if (!e.target.closest("#menu")) setMenu(false); });

  $("#menu").addEventListener("click", async (e) => {
    const act = e.target.closest("[data-menu]")?.dataset.menu;
    if (!act) return;
    setMenu(false);
    if (act === "rename") {
      const n = await askText(tr("Rename dashboard"), current.name, tr("Rename"));
      if (n) { mutate(() => { current.name = n; }, null, { rerender: false }); renderAll(); }
    } else if (act === "starter") {
      if (!ha.connected) { toast(tr("Not connected to Home Assistant. Retrying…"), true); return; }
      const d = starterDashboard();
      store.dashboards.push(d); scheduleSave(); setCurrent(d.id);
      toast(tr("Created “{0}” from your devices.", d.name));
    } else if (act === "duplicate") {
      const d = clone(current); d.id = uid(); d.name += ` ${tr("copy")}`;
      d.tabs.forEach((t) => { t.id = uid(); t.widgets.forEach((w) => (w.id = uid())); });
      store.dashboards.push(d); scheduleSave(); setCurrent(d.id);
    } else if (act === "export") {
      const blob = new Blob([JSON.stringify(current, null, 2)], { type: "application/json" });
      const a = document.createElement("a");
      a.href = URL.createObjectURL(blob);
      a.download = `${current.name.replace(/[^\w-]+/g, "_")}.dashboard.json`;
      a.click();
      setTimeout(() => URL.revokeObjectURL(a.href), 1000);
    } else if (act === "import") {
      $("#import-file").click();
    } else if (act === "delete") {
      if (store.dashboards.length === 1) { toast(tr("This is your only dashboard. Create another one before deleting it."), true); return; }
      const ok = await confirmDestructive(tr("Delete “{0}”?", current.name), tr("The dashboard and its widgets will be removed. This can’t be undone."), tr("Delete"));
      if (!ok) return;
      store.dashboards = store.dashboards.filter((d) => d.id !== current.id);
      scheduleSave(); setCurrent(store.dashboards[0].id);
    }
  });

  $("#import-file").onchange = async (e) => {
    const file = e.target.files[0];
    e.target.value = "";
    if (!file) return;
    try {
      const d = migrate(JSON.parse(await file.text()));
      if (!d.tabs.every((t) => Array.isArray(t.widgets))) throw new Error(tr("the file has no widgets list"));
      d.id = uid();
      d.tabs.forEach((t) => { t.id = uid(); t.widgets.forEach((w) => (w.id = uid())); });
      d.name = d.name || file.name;
      store.dashboards.push(d); scheduleSave(); setCurrent(d.id);
      toast(tr("Imported “{0}”.", d.name));
    } catch (err) { toast(tr("Couldn’t import: {0}.", err.message), true); }
  };

  navEl.addEventListener("click", (e) => {
    const op = e.target.closest("[data-tabop]");
    if (op) { tabOp(op.dataset.tabop); return; }
    const b = e.target.closest("[data-tab]");
    if (b) setTab(b.dataset.tab);
  });

  $("#palette-list").addEventListener("click", (e) => {
    const b = e.target.closest("[data-add]");
    if (b) addWidget(b.dataset.add);
  });

  const insp = $("#inspector");
  insp.addEventListener("input", onInspectorInput);
  insp.addEventListener("change", onInspectorInput);
  insp.addEventListener("click", (e) => {
    const seg = e.target.closest(".seg button[data-path]");
    if (seg) { applyField(seg, seg.dataset.v, true); return; }
    const p = e.target.closest("[data-preset]");
    if (p) {
      mutate(() => {
        const keep = { surface: current.theme.surface, radius: current.theme.radius, bgImage: current.theme.bgImage };
        current.theme = { ...DEFAULT_THEME, ...PRESETS[p.dataset.preset], ...keep, preset: p.dataset.preset };
        delete current.theme.swatch;
      });
      renderInspector(); return;
    }
    const del = e.target.closest("[data-ent-del]");
    if (del) {
      const w = tab().widgets.find((x) => x.id === selectedId);
      mutate(() => w.cfg[del.dataset.k].splice(Number(del.dataset.entDel), 1), null, { rerender: false });
      renderWidget(w); renderInspector(); return;
    }
    const ruleAdd = e.target.closest("[data-rule-add]"), ruleDel = e.target.closest("[data-rule-del]");
    if (ruleAdd || ruleDel) {
      const w = tab().widgets.find((x) => x.id === selectedId);
      mutate(() => {
        w.visibility ||= { mode: "all", rules: [] };
        if (ruleAdd) w.visibility.rules.push({ entity: "", op: "is", value: "" });
        else w.visibility.rules.splice(Number(ruleDel.dataset.ruleDel), 1);
      });
      renderInspector();
      if (ruleAdd) $(`#inspector [data-path="rule"][data-idx="${w.visibility.rules.length - 1}"][data-k="entity"]`)?.focus();
      return;
    }
    const op = e.target.closest("[data-tabop]");
    if (op) { tabOp(op.dataset.tabop, op.dataset.tabId); return; }
    const k = e.target.closest("[data-kiosk]");
    if (k) {
      if (k.dataset.kiosk === "here") enterKiosk();
      else window.open(new URL(`#kiosk&view=${current.id}`, BASE).href, "_blank", "noopener");
      return;
    }
    const tool = e.target.closest("[data-tool]");
    if (tool && selectedId) tool.dataset.tool === "dup" ? duplicate(selectedId) : remove(selectedId);
  });

  document.addEventListener("keydown", (e) => {
    if (e.key === "Escape") {
      if (modalClose) { modalClose(null); return; }
      if (!$("#menu").hidden) { setMenu(false); $("#btn-menu").focus(); return; }
      if (kiosk) { kioskPrompt(); return; }
    }
    if (!editMode || modalClose) return;
    const inField = /INPUT|TEXTAREA|SELECT/.test(document.activeElement?.tagName);
    const mod = e.ctrlKey || e.metaKey;
    if (mod && e.key.toLowerCase() === "z" && !inField) { e.preventDefault(); e.shiftKey ? redo() : undo(); return; }
    if (mod && e.key.toLowerCase() === "y" && !inField) { e.preventDefault(); redo(); return; }
    if (inField || !selectedId) return;
    const w = tab().widgets.find((x) => x.id === selectedId);
    if (!w) return;
    if (e.key === "Delete" || e.key === "Backspace") { e.preventDefault(); remove(w.id); }
    else if (mod && e.key.toLowerCase() === "d") { e.preventDefault(); duplicate(w.id); }
    else if (e.key === "Escape") select(null);
    else if (e.key.startsWith("Arrow")) {
      e.preventDefault();
      const d = { ArrowLeft: [-1, 0], ArrowRight: [1, 0], ArrowUp: [0, -1], ArrowDown: [0, 1] }[e.key];
      mutate(() => {
        if (e.shiftKey) { w.w = Math.max(1, Math.min(current.grid.cols - w.x, w.w + d[0])); w.h = Math.max(1, w.h + d[1]); }
        else { w.x = Math.max(0, Math.min(current.grid.cols - w.w, w.x + d[0])); w.y = Math.max(0, w.y + d[1]); }
        resolveCollisions(w);
      }, `kbd-${w.id}`);
      select(w.id);
    }
  });

  let resizeRaf = 0;
  window.addEventListener("resize", () => { cancelAnimationFrame(resizeRaf); resizeRaf = requestAnimationFrame(renderGrid); });
  matchMedia("(prefers-color-scheme: dark)").addEventListener?.("change", () => renderGrid());

  // clocks, screen saver and camera refresh
  setInterval(() => {
    gridEl.querySelectorAll("[data-clock]").forEach((el) => { el.innerHTML = clockHTML(el.dataset.h24 === "1", el.dataset.sec === "1", el.dataset.date === "1"); });
    if (!$("#saver").hidden) updateSaver();
    const now = Date.now();
    gridEl.querySelectorAll("img[data-cam]").forEach((img) => {
      const every = Number(img.dataset.refresh) * 1000;
      if (!img._last) img._last = now;
      if (now - img._last >= every) { img._last = now; img.src = `api/camera/${encodeURIComponent(img.dataset.cam)}?t=${now}`; }
    });
  }, 1000);
  // keep "x min ago" labels and graph time windows fresh
  setInterval(() => { if (!editMode && current) tab().widgets.filter((w) => w.type === "graph" || w.type === "calendar" || w.cfg.showChanged).forEach((w) => renderWidget(w)); }, 60000);

  // ------------------------------------------------------------ boot
  function paintChromeIcons() {
    $("#btn-new").innerHTML = Icons.svg("plus");
    $("#btn-undo").innerHTML = Icons.svg("undo");
    $("#btn-redo").innerHTML = Icons.svg("redo");
    $("#btn-menu").innerHTML = Icons.svg("more");
    $("#btn-kiosk").insertAdjacentHTML("afterbegin", Icons.svg("kiosk"));
    document.querySelectorAll("#menu [data-icon]").forEach((b) => b.insertAdjacentHTML("afterbegin", Icons.svg(b.dataset.icon)));
  }

  ha.onStatus = (ok) => {
    const c = $("#conn");
    c.classList.toggle("ok", ok);
    c.textContent = ok ? tr("Connected") : tr("Offline");
    // An update restarts the app, which drops the connection: check right after reconnecting.
    if (ok) checkVersion();
  };

  /** If the app was updated while this page was open, load the new version. */
  let updateNoticeShown = false;
  async function checkVersion() {
    if (APP_VERSION === "dev") return;
    let latest;
    try { latest = (await api("api/version")).version; } catch { return; }
    if (!latest || latest === APP_VERSION) return;
    if (editMode) { // never yank the editor away; just say so once
      if (!updateNoticeShown) toast(tr("Dashboard Studio was updated to {0}. Reload the page to use it.", latest));
      updateNoticeShown = true;
      return;
    }
    toast(tr("Dashboard Studio was updated to {0}. Reloading…", latest));
    if (savePending) { clearTimeout(saveTimer); await save(); } // keep edits still waiting to be saved
    setTimeout(() => location.reload(), 2500);
  }
  setInterval(checkVersion, 5 * 60 * 1000);
  ha.onChange = onStateChange;

  /** Translate the static page: elements marked data-i18n, plus every aria-label and title. */
  function translateStatic() {
    document.querySelectorAll("[data-i18n]").forEach((el) => { el.textContent = tr(el.textContent.trim()); });
    for (const attr of ["aria-label", "title"]) document.querySelectorAll(`[${attr}]`).forEach((el) => el.setAttribute(attr, tr(el.getAttribute(attr))));
  }

  async function boot() {
    translateStatic();
    paintChromeIcons();
    renderPalette();
    try {
      const r = await fetch(new URL("api/dashboards", BASE));
      store = await r.json();
      store.dashboards = (store.dashboards || []).map(migrate);
    } catch { toast(tr("Couldn’t load your dashboards. Check that the app is running."), true); }

    const firstReady = new Promise((res) => {
      const prev = ha.onStatus;
      ha.onStatus = (ok) => { prev(ok); if (ok) res(); };
      setTimeout(res, 4000);
    });
    ha.connect();

    if (!store.dashboards?.length) {
      await firstReady;
      store = { version: 1, dashboards: [starterDashboard()] };
      save();
    }
    const hashId = (location.hash.match(/view=([\w-]+)/) || [])[1];
    setCurrent(hashId || lsGet("ds.current"));
    if (location.hash.includes("kiosk")) enterKiosk({ fullscreen: false });
  }

  boot();
})();