docs(privacy): add tuner.theme + tuner.quickStations to storage key list

Effective date bumped 2026-06-09 → 2026-06-10. Two new storage keys
added by v0.5.0 + v0.5.3 are now documented:

- tuner.theme — user's chosen theme preference (auto/dark/light)
- tuner.quickStations — user's Quick Stations picks

Neither key changes the privacy story (still all local, still no
data transmitted). Just keeping the per-key inventory honest.

The davidtkeane.com privacy.html mirror has the same edits and
will be uploaded separately by David.

CHANGELOG.md

@@ -7,7 +7,7 @@ Format: [Keep a Changelog 1.1.0](https://keepachangelog.com/en/1.1.0/) — versi
 
 ## [Unreleased]
 
-### Planned — Future polish
+### Planned — Long-term
 - `.m3u` parser alongside `.pls` to widen future-adapter compatibility
 - Station artwork lazy-load + fallback to family helmet
 - Better error UI for failed streams ("Stream unavailable, try another")
@@ -16,6 +16,62 @@ Format: [Keep a Changelog 1.1.0](https://keepachangelog.com/en/1.1.0/) — versi
 
 ---
 
+## [0.5.3] — 2026-06-10 — User-customizable Quick Stations + history export ("app is done")
+
+Per David: *"this app is kinda done"* — meaning the product surface is feature-complete. After this version, polish remains but no headline features are missing.
+
+### Added — User-customizable Quick Stations
+
+Pure-data architecture: the NewTab Quick Stations chip row is now driven by `tuner.quickStations` in `chrome.storage.local` rather than a hardcoded `QUICK_IDS` array. **Default 8 (tidy 2-row layout, matches v0.4.0 look).** User can pick any subset of all 46 SomaFM channels via a new Options page card.
+
+**Where:** new "Quick Stations" card on the Options page (sits between Appearance and Playback). Layout: helper text + selected-count badge + scrollable checkbox list + Reset-to-defaults button.
+
+**Each list row** shows: checkbox + station name + genre pill (accent green, uppercase) + the SomaFM channel description (the same string available as a chip-hover tooltip on the NewTab — now properly visible at the time of picking).
+
+**Live sync:** ticking a checkbox writes to `chrome.storage.local`. The NewTab `chrome.storage.onChanged` listener picks up the change and re-renders the Quick Stations chip row instantly without a reload. Cross-surface consistency is the same pattern as theme + station selection.
+
+**Robust fresh-install fallback:** if Options is opened BEFORE the NewTab has ever populated the station catalogue cache, `initQuickStationsUI` fetches SomaFM channels directly via `listAllStations()` then caches the result back to `tuner.stationsCache`. Future Options opens are then instant.
+
+**Empty-pick case:** if the user unticks everything, the Quick Stations row on the NewTab shows *"No Quick Stations picked — set some in ⚙ Settings."* instead of a silently empty section.
+
+### Added — History export (JSON + CSV)
+
+Two new buttons in the Local Data card: **Export history (JSON)** and **Export history (CSV)**.
+
+- **JSON**: full pretty-printed array of `tuner.history` entries. Best for programmatic re-import or backup.
+- **CSV**: RFC 4180 quoted (every cell quoted, doubled quotes for embedded quotes). Header: `artist,title,station,station_id,when_iso`. Opens cleanly in Excel / Numbers / Google Sheets.
+
+Filename: `rangerhq-tuner-history-YYYY-MM-DD.{ext}`.
+
+Empty-history case shows an error toast ("No history to export yet — play some music first"). Success case shows a green toast with the export count and format.
+
+No new permissions — uses standard `Blob` + `URL.createObjectURL` + a programmatic `<a>` click. The entire export runs client-side in the Options page; nothing is sent off-device.
+
+### New / changed files
+
+- `src/lib/quick-stations.js` (NEW, ~55 lines) — `DEFAULT_QUICK_IDS` constant + `getQuickStations / setQuickStations / resetQuickStations` helpers. Same defensive `storage()` accessor pattern as `lib/history.js` and `lib/theme.js`.
+- `src/newtab/newtab.js` — removed hardcoded `QUICK_IDS` array, replaced with module-level `quickIds = []` populated during `init()` from `getQuickStations()` and re-loaded when `chrome.storage.onChanged` fires on `tuner.quickStations`. `renderQuick()` shows the empty-pick fallback message.
+- `src/options/options.html` — new "Quick Stations" card + two export buttons in the Local Data card.
+- `src/options/options.css` — ~90 lines for the picker (scrollable list, row layout, accent-coloured count badge, hover background, brand scrollbar).
+- `src/options/options.js` — `initQuickStationsUI` builds the checkbox list, `onQuickStationToggle` persists picks, `exportHistoryAs` generates the download Blob. Plus the storage.onChanged listener was made async to support cross-surface picker sync.
+
+Total: 5 files, +372 / -25 lines (1 new file).
+
+### Not changed
+
+- No new permissions
+- No new host_permissions
+- No new external libraries / SDKs
+- No data migration required
+- Existing user state (current station / volume / history / favourites / theme) survives intact
+- Defaults match v0.4.0's curated Quick Stations exactly — users who never open Options get the same look they had before
+
+### Workflow note
+
+This release was bundled into v0.5.0's eventual Web Store upload — when v0.5.0 clears re-review, we build a v0.5.3 ZIP directly from main and upload that instead. Users at v0.4.0 jump straight to v0.5.3 (skipping v0.5.0, v0.5.1, v0.5.2) and get all the polish in a single update notification.
+
+---
+
 ## [0.5.2] — 2026-06-10 — Quick Stations fix: replace retired BAGeL with PopTron
 
 Hotfix for v0.5.1's Quick Stations row. David flagged: *"the stations still look a bit off"* — turned out only 13 chips were rendering instead of the intended 14. Investigation showed **BAGeL Radio has been retired from SomaFM's current `channels.json` catalogue** — the render loop's "drop missing slugs silently" behaviour (working as designed) made the chip just disappear.

PRIVACY.md

@@ -1,6 +1,6 @@
 # Privacy Policy — RangerHQ Tuner
 
-**Effective date:** 2026-06-09
+**Effective date:** 2026-06-10
 **Maintainer:** David Keane — <david@davidtkeane.com>
 **Extension homepage:** https://davidtkeane.com/rangerhq-tuner
 **Source code:** https://git.davidtkeane.com/ranger/rangerhq-tuner
@@ -49,6 +49,8 @@ RangerHQ Tuner uses Chrome's `chrome.storage.local` API to persist a small amoun
 | `tuner.history` | A capped log of artist + title pairs heard while playing | The History tab on the New Tab Page |
 | `tuner.favourites` | Track entries you have starred | The Favourites tab |
 | `tuner.historyCap` | Your chosen history-cap value (default 500) | Configurable on the Options page |
+| `tuner.theme` | Your theme preference (`auto` / `dark` / `light`) | Configurable on the Options page; default `auto` follows OS |
+| `tuner.quickStations` | The SomaFM channel short IDs you chose to surface in the New Tab Page Quick Stations row | Configurable on the Options page; default is a curated 8 |
 
 The history and favourites entries contain: artist name, track title, station display name, station ID, and a local timestamp. **They are stored in your browser only.** They are never sent to the extension author or any third party.
 

manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "RangerHQ Tuner",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "description": "Lightweight SomaFM radio player. Logs what plays. One-click search to Spotify, YouTube, Apple Music, Bandcamp. No telemetry.",
   "author": "David Keane",
   "homepage_url": "https://davidtkeane.com/rangerhq-tuner",

src/lib/quick-stations.js

@@ -0,0 +1,58 @@
+// RangerHQ Tuner — Quick Stations preference helpers (v0.5.3).
+//
+// The user picks which SomaFM channels appear in the Quick Stations chip
+// row on the New Tab Page. Stored in chrome.storage.local under
+// `tuner.quickStations` as an array of SomaFM short ids
+// (e.g. ['groovesalad', 'defcon', ...]). If the key is missing, the
+// DEFAULT_QUICK_IDS below are used — a tidy 8 that wraps to 2 rows on
+// most viewports.
+//
+// Cross-surface sync: NewTab's `chrome.storage.onChanged` listener picks
+// up changes so toggling a checkbox in Options re-renders the chip row
+// instantly without a reload.
+
+export const QUICK_STATIONS_KEY = 'tuner.quickStations';
+
+// 8 curated defaults — the same set Tuner v0.4.0 shipped with. Chosen
+// for genre breadth (chill / ambient / indie / lounge / space / vocal /
+// ambient / electronic) and to fit a tidy 2-row chip layout.
+export const DEFAULT_QUICK_IDS = Object.freeze([
+  'groovesalad',
+  'dronezone',
+  'indiepop',
+  'secretagent',
+  'spacestation',
+  'lush',
+  'deepspaceone',
+  'fluid',
+]);
+
+function storage() {
+  if (typeof chrome === 'undefined') return null;
+  if (!chrome.storage || !chrome.storage.local) return null;
+  return chrome.storage.local;
+}
+
+/** Read the user's chosen quick-station list, falling back to defaults. */
+export async function getQuickStations() {
+  const s = storage();
+  if (!s) return [...DEFAULT_QUICK_IDS];
+  const o = await s.get(QUICK_STATIONS_KEY);
+  const v = o[QUICK_STATIONS_KEY];
+  return Array.isArray(v) ? v.filter(x => typeof x === 'string') : [...DEFAULT_QUICK_IDS];
+}
+
+/** Persist the user's chosen quick-station list. Empty array = no quick chips. */
+export async function setQuickStations(ids) {
+  const s = storage();
+  if (!s) return;
+  const arr = Array.isArray(ids) ? ids.filter(x => typeof x === 'string') : [];
+  await s.set({ [QUICK_STATIONS_KEY]: arr });
+}
+
+/** Wipe the preference so the default-8 is used again. */
+export async function resetQuickStations() {
+  const s = storage();
+  if (!s) return;
+  await s.remove(QUICK_STATIONS_KEY);
+}

src/newtab/newtab.js

@@ -14,6 +14,7 @@ import {
   entrySignature,
 } from '../lib/history.js';
 import { THEME_KEY, THEME_DEFAULT, initTheme, applyTheme } from '../lib/theme.js';
+import { QUICK_STATIONS_KEY, getQuickStations } from '../lib/quick-stations.js';
 
 const els = {
   // Clock
@@ -55,29 +56,11 @@ const STORAGE_KEYS = {
 
 const CATALOGUE_TTL_MS = 6 * 60 * 60 * 1000;
 
-// Quick-pick stations. These are the SomaFM ids most people start with.
-// If the catalogue is missing any (rare), they're just dropped silently.
-//
-// Layout: 14 stations across roughly chill / ambient / indie / lounge /
-// space / electronic / americana / 80s / alt-rock / celtic — broader
-// genre coverage than the v0.4.0 list, plus DEF CON Radio (the on-brand
-// cybersecurity pick) and ThistleRadio (the Dublin-built Irish nod).
-const QUICK_IDS = [
-  'groovesalad',     // chill / electronic
-  'dronezone',       // ambient
-  'indiepop',        // indie pop rocks
-  'secretagent',     // lounge / spy
-  'spacestation',    // ambient / space
-  'lush',            // vocal / chill
-  'deepspaceone',    // ambient
-  'fluid',           // electronic
-  'defcon',          // electronic / hacker culture (DEF CON Radio)
-  'beatblender',     // electronic / breakbeat
-  'bootliquor',      // americana / outlaw country
-  'u80s',            // 80s indie / synthwave (Underground 80s)
-  'poptron',         // alternative / alt-rock (PopTron) — replaces BAGeL Radio (retired by SomaFM)
-  'thistle',         // celtic / folk (ThistleRadio)
-];
+// Quick-pick stations come from chrome.storage.local under tuner.quickStations,
+// with DEFAULT_QUICK_IDS as fallback (8 curated for tidy 2-row layout).
+// User can pick their own set in the Options page's "Quick Stations" card.
+// See src/lib/quick-stations.js for the persistence helpers + defaults.
+let quickIds = [];
 
 let stations = [];
 let currentStation = null;
@@ -126,6 +109,7 @@ async function init() {
   currentStation = stations.find(s => s.id === currentId) || null;
   reflectFirstRunHint();
   renderNow();
+  quickIds = await getQuickStations();
   renderQuick();
   renderList();
 
@@ -201,6 +185,11 @@ async function init() {
       applyTheme(changes[THEME_KEY].newValue || THEME_DEFAULT);
     }
 
+    if (changes[QUICK_STATIONS_KEY]) {
+      quickIds = await getQuickStations();
+      renderQuick();
+    }
+
     if (changes[STORAGE_KEYS.currentId] && stations.length) {
       const newId = changes[STORAGE_KEYS.currentId].newValue;
       currentStation = stations.find(s => s.id === newId) || null;
@@ -263,7 +252,14 @@ function renderQuick() {
     els.quickList.appendChild(empty);
     return;
   }
-  for (const shortId of QUICK_IDS) {
+  if (!quickIds.length) {
+    const empty = document.createElement('span');
+    empty.className = 'nt-quick-empty';
+    empty.textContent = 'No Quick Stations picked — set some in ⚙ Settings.';
+    els.quickList.appendChild(empty);
+    return;
+  }
+  for (const shortId of quickIds) {
     const fullId = `somafm:${shortId}`;
     const s = stations.find(st => st.id === fullId);
     if (!s) continue;

src/options/options.css

@@ -367,3 +367,100 @@ html, body {
   background: var(--danger);
   color: var(--cream);
 }
+
+/* ──────────────────────────────────────────────────────────────────────
+   Quick Stations picker (v0.5.3) — scrollable checkbox list of every
+   SomaFM channel. Toggles persist to chrome.storage.local under
+   tuner.quickStations; NewTab re-renders chip row instantly.
+   ────────────────────────────────────────────────────────────────────── */
+
+.opt-qs-count {
+  color: var(--accent);
+  font-weight: 500;
+}
+
+.opt-qs-list {
+  margin: 12px 0 0;
+  padding: 0;
+  list-style: none;
+  max-height: 360px;
+  overflow-y: auto;
+  border: 1px solid var(--bg-row);
+  border-radius: var(--radius);
+  background: var(--bg-row);
+}
+
+.opt-qs-list::-webkit-scrollbar {
+  width: 8px;
+}
+.opt-qs-list::-webkit-scrollbar-thumb {
+  background: var(--bg-row-hi);
+  border-radius: 4px;
+}
+.opt-qs-list::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+.opt-qs-loading {
+  padding: 14px;
+  text-align: center;
+  color: var(--fg-muted);
+  font-size: 12px;
+}
+
+.opt-qs-row {
+  border-bottom: 1px solid var(--bg-soft);
+}
+
+.opt-qs-row:last-child {
+  border-bottom: none;
+}
+
+.opt-qs-label {
+  display: flex;
+  align-items: flex-start;
+  gap: 12px;
+  padding: 10px 14px;
+  margin: 0;
+  cursor: pointer;
+  font-weight: 400;
+}
+
+.opt-qs-label:hover {
+  background: var(--bg-row-hi);
+}
+
+.opt-qs-label input[type="checkbox"] {
+  margin: 3px 0 0 0;
+  accent-color: var(--accent);
+  flex-shrink: 0;
+  width: 14px;
+  height: 14px;
+  cursor: pointer;
+}
+
+.opt-qs-main {
+  flex: 1;
+  min-width: 0;
+}
+
+.opt-qs-name {
+  font-size: 13px;
+  font-weight: 500;
+  color: var(--fg);
+}
+
+.opt-qs-genre {
+  font-size: 10px;
+  color: var(--accent);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  margin-top: 2px;
+}
+
+.opt-qs-desc {
+  font-size: 11px;
+  color: var(--fg-muted);
+  margin-top: 3px;
+  line-height: 1.4;
+}

src/options/options.html

@@ -53,6 +53,11 @@
         </div>
       </div>
 
+      <div class="opt-actions">
+        <button id="opt-export-json" class="opt-btn">Export history (JSON)</button>
+        <button id="opt-export-csv"  class="opt-btn">Export history (CSV)</button>
+      </div>
+
       <div class="opt-actions">
         <button id="opt-clear-history" class="opt-btn">Clear history</button>
         <button id="opt-clear-favs"    class="opt-btn">Clear favourites</button>
@@ -84,6 +89,20 @@
       </div>
     </section>
 
+    <section class="opt-card">
+      <h2>Quick Stations</h2>
+      <p class="opt-note">
+        Pick which SomaFM channels show in the chip row on the New Tab Page.
+        <span id="opt-qs-count" class="opt-qs-count">— selected</span>
+      </p>
+      <ul id="opt-qs-list" class="opt-qs-list" role="list">
+        <li class="opt-qs-loading">Loading channel list…</li>
+      </ul>
+      <div class="opt-actions">
+        <button id="opt-qs-reset" class="opt-btn" type="button">Reset to defaults (8)</button>
+      </div>
+    </section>
+
     <section class="opt-card">
       <h2>Playback</h2>
       <div class="opt-row opt-row--inline">

src/options/options.js

@@ -9,10 +9,15 @@ import {
   getHistoryCap, setHistoryCap,
   clearHistory, clearFavourites, clearAll,
 } from '../lib/history.js';
+import { listAllStations } from '../sources/index.js';
 import {
   THEME_KEY, THEME_DEFAULT, VALID_THEMES,
   getTheme, setTheme, applyTheme,
 } from '../lib/theme.js';
+import {
+  QUICK_STATIONS_KEY, DEFAULT_QUICK_IDS,
+  getQuickStations, setQuickStations, resetQuickStations,
+} from '../lib/quick-stations.js';
 
 const STORAGE_KEYS = {
   stations:    'tuner.stationsCache',
@@ -34,6 +39,13 @@ const els = {
   volumeDisplay:  document.getElementById('opt-volume-display'),
   lastStation:    document.getElementById('opt-last-station'),
   toast:          document.getElementById('opt-toast'),
+  // Quick Stations picker (v0.5.3)
+  qsCount:        document.getElementById('opt-qs-count'),
+  qsList:         document.getElementById('opt-qs-list'),
+  qsReset:        document.getElementById('opt-qs-reset'),
+  // Export history (v0.5.3)
+  exportJson:     document.getElementById('opt-export-json'),
+  exportCsv:      document.getElementById('opt-export-csv'),
 };
 
 init().catch(err => {
@@ -48,6 +60,9 @@ async function init() {
   // cross-surface changes (popup/newtab pick a theme → Options reflects).
   await initThemeUI();
 
+  // Quick Stations — render checkbox list of all SomaFM channels.
+  await initQuickStationsUI();
+
   await refreshStats();
   await refreshPlayback();
 
@@ -65,6 +80,9 @@ async function init() {
     await refreshStats();
   });
 
+  els.exportJson.addEventListener('click', () => exportHistoryAs('json'));
+  els.exportCsv.addEventListener('click',  () => exportHistoryAs('csv'));
+
   els.clearHistory.addEventListener('click', async () => {
     if (!confirm('Clear all track history? Favourites will be preserved.')) return;
     await clearHistory();
@@ -93,7 +111,7 @@ async function init() {
   });
 
   // Refresh stats live if storage changes from another surface
-  chrome.storage.onChanged.addListener((changes, area) => {
+  chrome.storage.onChanged.addListener(async (changes, area) => {
     if (area !== 'local') return;
     if (changes[THEME_KEY]) {
       const v = changes[THEME_KEY].newValue || THEME_DEFAULT;
@@ -101,6 +119,15 @@ async function init() {
       const radio = document.querySelector(`input[name="opt-theme"][value="${v}"]`);
       if (radio) radio.checked = true;
     }
+    if (changes[QUICK_STATIONS_KEY]) {
+      // Re-check the boxes to match the new picks (in case another surface
+      // wiped storage or reset to defaults).
+      const newPicks = new Set(await getQuickStations());
+      for (const cb of document.querySelectorAll('#opt-qs-list input[type=checkbox]')) {
+        cb.checked = newPicks.has(cb.value);
+      }
+      updateQuickStationsCount(newPicks.size);
+    }
     if (Object.keys(changes).some(k => k.startsWith('tuner.'))) {
       refreshStats();
       refreshPlayback();
@@ -125,6 +152,116 @@ async function initThemeUI() {
   }
 }
 
+/** Render the Quick Stations picker — checkbox per SomaFM channel from
+ *  the cached catalogue, with description below each name. Toggling a
+ *  checkbox writes the current picks to chrome.storage.local under
+ *  tuner.quickStations. NewTab's storage.onChanged listener re-renders
+ *  the chip row instantly without a reload. */
+async function initQuickStationsUI() {
+  // Try the NewTab cache first (fast path).
+  let cache = (await chrome.storage.local.get('tuner.stationsCache'))['tuner.stationsCache'] || [];
+
+  // Fresh install fallback: if Options is opened BEFORE NewTab has ever
+  // populated the cache, fetch SomaFM channels directly + cache them.
+  if (!cache.length) {
+    try {
+      cache = await listAllStations();
+      // Cache it back so future loads are instant.
+      await chrome.storage.local.set({
+        'tuner.stationsCache':  cache,
+        'tuner.stationsCachedAt': Date.now(),
+      });
+    } catch (err) {
+      console.warn('Quick Stations: failed to fetch channel list', err);
+    }
+  }
+
+  // Stations come in as { id: "somafm:groovesalad", name, description, genre, ... }
+  // Sort alphabetically by name for predictable picker order.
+  const channels = [...cache].sort((a, b) => (a.name || '').localeCompare(b.name || ''));
+  const picks = new Set(await getQuickStations());
+
+  els.qsList.innerHTML = '';
+  if (!channels.length) {
+    const li = document.createElement('li');
+    li.className = 'opt-qs-loading';
+    li.textContent = 'Could not load SomaFM channel list — check your network connection and reopen Settings.';
+    els.qsList.appendChild(li);
+    return;
+  }
+
+  for (const ch of channels) {
+    const shortId = (ch.id || '').split(':')[1];
+    if (!shortId) continue;
+
+    const li = document.createElement('li');
+    li.className = 'opt-qs-row';
+
+    const label = document.createElement('label');
+    label.className = 'opt-qs-label';
+
+    const cb = document.createElement('input');
+    cb.type = 'checkbox';
+    cb.value = shortId;
+    cb.checked = picks.has(shortId);
+    cb.addEventListener('change', onQuickStationToggle);
+
+    const main = document.createElement('div');
+    main.className = 'opt-qs-main';
+
+    const name = document.createElement('div');
+    name.className = 'opt-qs-name';
+    name.textContent = ch.name || shortId;
+
+    if (ch.genre) {
+      const g = document.createElement('div');
+      g.className = 'opt-qs-genre';
+      g.textContent = ch.genre;
+      main.appendChild(name);
+      main.appendChild(g);
+    } else {
+      main.appendChild(name);
+    }
+
+    if (ch.description) {
+      const desc = document.createElement('div');
+      desc.className = 'opt-qs-desc';
+      desc.textContent = ch.description;
+      main.appendChild(desc);
+    }
+
+    label.appendChild(cb);
+    label.appendChild(main);
+    li.appendChild(label);
+    els.qsList.appendChild(li);
+  }
+
+  updateQuickStationsCount(picks.size);
+
+  els.qsReset.addEventListener('click', async () => {
+    if (!confirm('Reset Quick Stations to the default 8?')) return;
+    await resetQuickStations();
+    // Re-check the boxes to match defaults
+    const defaultSet = new Set(DEFAULT_QUICK_IDS);
+    for (const cb of document.querySelectorAll('#opt-qs-list input[type=checkbox]')) {
+      cb.checked = defaultSet.has(cb.value);
+    }
+    updateQuickStationsCount(defaultSet.size);
+    toast('Quick Stations reset to defaults');
+  });
+}
+
+async function onQuickStationToggle() {
+  const all = [...document.querySelectorAll('#opt-qs-list input[type=checkbox]')];
+  const picked = all.filter(c => c.checked).map(c => c.value);
+  await setQuickStations(picked);
+  updateQuickStationsCount(picked.length);
+}
+
+function updateQuickStationsCount(n) {
+  els.qsCount.textContent = `${n} selected`;
+}
+
 async function refreshStats() {
   const [history, favs, all] = await Promise.all([
     getHistory(),
@@ -175,6 +312,46 @@ function formatBytes(n) {
   return `${(n / (1024 * 1024)).toFixed(2)} MB`;
 }
 
+/** Download tuner.history as a JSON or CSV file. (v0.5.3) */
+async function exportHistoryAs(format) {
+  const history = await getHistory();
+  if (!history.length) {
+    toast('No history to export yet — play some music first', 'error');
+    return;
+  }
+
+  let blob, ext, mime;
+  if (format === 'json') {
+    blob = new Blob([JSON.stringify(history, null, 2)], { type: 'application/json' });
+    ext = 'json';
+  } else {
+    // CSV — RFC 4180 quoting (doubled quotes, every cell quoted for safety).
+    const q = v => `"${String(v ?? '').replace(/"/g, '""')}"`;
+    const header = 'artist,title,station,station_id,when_iso\n';
+    const rows = history.map(e => [
+      q(e.artist),
+      q(e.title),
+      q(e.station),
+      q(e.stationId),
+      q(e.at ? new Date(e.at).toISOString() : ''),
+    ].join(',')).join('\n');
+    blob = new Blob([header + rows + '\n'], { type: 'text/csv;charset=utf-8' });
+    ext = 'csv';
+  }
+
+  const ts = new Date().toISOString().slice(0, 10);
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = `rangerhq-tuner-history-${ts}.${ext}`;
+  document.body.appendChild(a);
+  a.click();
+  document.body.removeChild(a);
+  setTimeout(() => URL.revokeObjectURL(url), 1000);
+
+  toast(`Exported ${history.length} track${history.length === 1 ? '' : 's'} as ${ext.toUpperCase()}`);
+}
+
 function toast(message, tone) {
   els.toast.textContent = message;
   els.toast.dataset.tone = tone || '';