Theseus: download tracker, search split, discover-more tier, UX polish

Bundle of UX + feature work. Split from packaging by intent so the diff
is reviewable; the next Theseus rebuild ships it.

Features
- Download tracker (new): session.on("will-download") → per-item state
  {id, filename, url, mime, total, received, state, savePath, startedAt}
  with updated/done event handlers. New downloadsPop WebContentsView
  loads downloads.html (new file) + downloads-preload.js (new file);
  panel positioned under a new #downloads toolbar button between search
  and Tor. Full IPC: downloads-get, toggle/close/resize-downloads,
  download-open/show/cancel/clear, downloads-clear-all. In-memory only —
  cross-session persistence is a future addition. Button badge shows
  active count + spin/done/err color.

- Search engines split by kind + tier:
  * kind: "search" | "llm" — separate headers in picker + settings
    ("Search with" / "Ask an AI"). Empty sections hidden.
  * tier: "catalog" | "extra" — Settings now has THREE panes behind the
    "+ Add search engine" button: curated catalog, wider discoverable
    bank filtered by a live search input, custom URL form.
  * DEFAULT_ENABLED unchanged (5 major engines).
  * Custom user-added engines carry tier="custom" (never in catalog/extra
    panes).

- 9 tier="extra" engines added (all non-login ?q=): Marginalia, Stract,
  Yep, Presearch, MetaGer, Qwant, Swisscows, Naver, Baidu. Same rot rule
  as LLMs: if one starts bouncing to a login gate, drop it.

Bug fixes
- Loadbar collapses to 0px when idle (was reserving a permanent 2px
  strip below the address bar). .loadbar {height:0} + .loadbar.on
  {height:2px} + 120ms transition.
- Native <select> popup theme sync via :root { color-scheme: dark } +
  @media(prefers-color-scheme: light). nativeTheme.themeSource already
  drives prefers-color-scheme, so the OS popup color follows the app
  theme automatically (fixed light popup on dark app / vice versa).
- .ctl layout flipped to flex-direction: row with flex-wrap so
  anti-fingerprint mode + value fields fit side-by-side.

Settings restructure
- General section: Startup group at the top ("Open previous windows and
  tabs" toggle), then Appearance below with three visual THEME CARDS
  (System / Light / Dark) — small mock-browser previews per theme,
  Firefox-style, active card gets a blue ring. System pipes through to
  nativeTheme.themeSource = "system".
- Search promoted to a top-level sidebar item between General and
  Naming. Search-engine controls moved out of General into Search.
- Search section: enabled list shows only enabled engines, grouped by
  kind, drag-reorder within a kind. "+ Add search engine" opens the
  catalog/extras/custom-URL panel.

Search engine catalog trims (already flagged in prior work)
- Removed ChatGPT / Claude / You.com (login-gated ?q=).
- Removed SearXNG (federated; every single-instance default rots).

Docs
- TheseusNavigator/PENDING.md and GOTCHAS.md born with this work
  (see the HANDOFF.md commit for the convention).
- PENDING.md's own "session: 2026-08-02:theseus-ux-polish" group will be
  emptied after this ship lands.

Preview harness
- _preview.html + _settings-preview.html stubs updated with kind + tier
  + downloads seed + tier="extra" samples so the preview reflects reality.
  Both files are gitignored — local only.

Coordination
- Parallel session's collision-policy work (chrome.html registry chips,
  popover switcher, Naming section, in-tab collision prompt) already
  landed in commits 256079d/42b340f/b0d6375/78dddda. This commit adds
  cleanly on top.

GOTCHAS.md

@@ -0,0 +1,121 @@
+# Theseus gotchas
+
+Non-obvious things sessions keep re-deriving. If you found this file because
+something broke in a way that felt spooky, the answer is probably here.
+
+## `build.files` in [package.json](package.json) is EXPLICIT
+
+electron-builder ships **only what's listed** in `build.files`. Every runtime-
+loaded HTML/preload/module MUST be there. A missing entry causes the
+`loadFile("foo.html")` in a WebContentsView to silently open blank in the
+packaged app — visually indistinguishable from "the button does nothing".
+
+`npm start` (dev) never catches this because it reads from the source tree
+directly. Only a real `npm run dist` + install exposes it.
+
+Every time you add a new `WebContentsView` or `loadFile`, add its HTML and
+preload to the `files` array. Sanity check after building:
+
+```
+node -e "const b = require('fs').readFileSync('dist-public/win-unpacked/resources/app.asar'); for (const n of ['engine-picker.html','popover.html','downloads.html','engine-picker-preload.js','popover-preload.js','downloads-preload.js']) console.log(n, b.indexOf(Buffer.from(n)) >= 0 ? 'OK' : 'MISSING');"
+```
+
+This has bit us once (search-picker dropdown, shipped `6bbccf9c`, blank
+picker). Do not let it bite twice.
+
+## Building — admin terminal the first time
+
+`npm run dist` needs an **admin** terminal on the machine's first Theseus
+build so `electron-builder`'s `winCodeSign` package can extract its
+`darwin/` symlinks (requires `SeCreateSymbolicLink`). Subsequent builds
+reuse the cache under `$LOCALAPPDATA/electron-builder/Cache/winCodeSign/`
+and don't need admin.
+
+If DNS is misbehaving on the machine, pin these hosts in
+`C:\Windows\System32\drivers\etc\hosts` before building so electron-builder
+can fetch: `github.com`, `codeload.github.com`,
+`objects.githubusercontent.com`, `release-assets.githubusercontent.com`.
+Strip them after.
+
+## Reproducible builds
+
+Set both before `npm run dist`:
+- `SOURCE_DATE_EPOCH` — freezes timestamps so a rebuild with no content
+  changes produces the same hash. Bump per release, not per rebuild.
+- `CSC_IDENTITY_AUTO_DISCOVERY=false` — stops electron-builder searching
+  for a signing cert (we don't sign; SECURITY.md rule 2).
+
+## Native `<select>` popup theme
+
+Chromium's native `<select>` popup uses the page's `color-scheme`. When it's
+`"light dark"` (both accepted), Chromium picks by the OS scheme — so a
+dark-themed app on a light OS shows a light popup and vice versa.
+
+Fix, currently in [settings.html](settings.html):
+```css
+:root { color-scheme: dark; }
+@media (prefers-color-scheme: light) { :root { color-scheme: light; } }
+```
+`nativeTheme.themeSource` (driven by `settings.theme`) sets
+`prefers-color-scheme`, so this stays in sync automatically. Do not remove.
+
+Chromium also respects `select option { background; color }` in the popup
+on Windows — a belt-and-braces override alongside `color-scheme`.
+
+## The resolver in Theseus is `resolver-web.mjs`, not `.js`
+
+Packaged builds ship `Argus/src/lib/resolver-web.js` as `resolver-web.mjs`
+(see `extraResources` in [package.json](package.json)). Renamed because
+`resources/` has no adjacent `package.json` so a `.js` gets treated as
+CommonJS and its `export`s fail. Dev reads the engine copy directly (Argus
+is `type: module` so `.js` works there).
+
+## The resolver's electrum WS `directIP` fallback
+
+[main.js](main.js) passes `directIP: true` to `resolveHost` so the engine
+can dial the chipnet electrum servers by pinned IP if system DNS is dead.
+Do not remove — this is what keeps `.bch` resolution working when the
+adapter DNS is broken (a real failure mode we've hit).
+
+## Publishing new hashes end-to-end
+
+1. Build (see above).
+2. Update `../site/releases-manifest.json` AND
+   `../site/tools/index.html` AND `../site/releases/index.html` with the
+   fresh SHA-256s + release date. All three must match.
+3. Deploy:
+   ```
+   scp dist-public/*.exe ../site/releases-manifest.json coinspectrum:/opt/silent-mode/dl/
+   cd ../Argus && node src/lib/sia-upload.js ../site bns/silentmode
+   ```
+4. On-chain (wallet spend, user's action):
+   `releases.silentmode.bch` currently publishes
+   `{"u":"https://dl.silentmode.st/releases-manifest.json"}` — a compact
+   `u` record because on-chain hashes wouldn't fit the 200-byte
+   OP_RETURN. Only re-publish if the URL changes or if we ever put full
+   hashes on-chain.
+
+## Sia upload from this machine fails without a `hosts` pin
+
+`node src/lib/sia-upload.js` fails with `getaddrinfo EAI_FAIL
+coinspectrum.duckdns.org` unless the host is pinned in
+`C:\Windows\System32\drivers\etc\hosts`:
+`195.184.247.106 coinspectrum.duckdns.org`. This is a DNS quirk of the
+machine, not a code bug — related to the strict-resolver behavior the
+Ariadne daemon's EDNS fix addresses.
+
+## Deploy directory quirks
+
+- `/opt/silent-mode/dl/` is served as `dl.silentmode.st` — installers +
+  manifest live here.
+- `silentmode.st` proxies to Sia (`bns/silentmode/`) — the HTML pages
+  live there.
+- The `bns` gateway does NOT auto-index directories. `silentmode.st/apps/`
+  is a 404 (`NoSuchKey`); users must hit `/apps/index.html`. Fix upstream
+  in `bnsd.js` if it ever matters.
+
+## Firefox needs a restart after Ariadne CA install/rotation
+
+Firefox only reads root CAs at startup. The Ariadne installer offers a
+`-CloseFirefox` task by default when Firefox is running so this doesn't
+bite. Chrome/Edge pick up the new root immediately.

PENDING.md

@@ -0,0 +1,149 @@
+# Pending — uncommitted Theseus changes
+
+Working-tree state that hasn't been committed or shipped. Read this before
+touching the same files. Update when you land or add work.
+
+Format: each group has a `session:` label so parallel sessions can see
+what belongs to whom and coordinate. Naming convention:
+`YYYY-MM-DD:short-slug` for date-bounded work, or `parallel:<theme>` for
+work owned by a session that isn't the current one.
+
+Last updated: 2026-08-02.
+
+---
+
+## session: `2026-08-02:theseus-ux-polish`
+
+Owner's focus: Theseus UX polish + downloads. Everything below bundles
+into one commit + one Theseus rebuild + redeploy.
+
+### Settings — General
+
+- **Startup group** at the top of `#general` with "Open previous windows
+  and tabs" toggle (moved up from below).
+- **Appearance** replaced with three visual **theme cards**: System / Light
+  / Dark. `System` follows `nativeTheme.themeSource = "system"` so it
+  tracks the OS. Legacy `settings.theme` values outside `{system, light,
+  dark}` fall back to `system`.
+- Files: [settings.html](settings.html), [main.js](main.js) (`applyTheme`
+  already handles all three values).
+
+### Settings — new Search section
+
+- Sidebar gets a **Search** top-level item between General and Naming.
+- Search-engine controls moved OUT of General into this section.
+- Only **enabled** engines listed in the main "Additional search engines"
+  block, grouped by kind (`Search engines` / `AI answer engines`),
+  drag-reorder within a kind, toggle to disable, ✕ to delete custom.
+- **+ Add search engine** button toggles a catalog panel below with
+  built-in engines the user hasn't enabled (each with `+ Add`) + a "Or add
+  a custom URL" form.
+- Files: [settings.html](settings.html) (nav, section, CSS `.engcat`, JS).
+
+### Settings — dropdown color-scheme + layout
+
+- `:root { color-scheme: dark }` + `@media (prefers-color-scheme: light)`
+  override. Native `<select>` popups on Windows now match app theme
+  because `nativeTheme.themeSource` drives `prefers-color-scheme`.
+  Fixes light popup on dark app (and vice versa).
+- `.ctl` layout flipped to `flex-direction: row` with `flex-wrap: wrap`,
+  so anti-fingerprint mode select + value input fit side-by-side on wide
+  rows.
+- Files: [settings.html](settings.html).
+
+### Search catalog
+
+- `SEARCH_ENGINES` entries gain `kind: "search" | "llm"` and
+  `tier: "catalog" | "extra"`. `allEngines()` propagates both; custom
+  user-added engines carry `tier: "custom"`.
+- **Two-tier discovery in settings**: catalog panel has "Add from catalog"
+  (curated first-class disabled built-ins) + "Discover more engines" (wider
+  `tier:"extra"` bank, filtered by a live search box) + "Or add a custom URL".
+- **Removed** from catalog (require sign-in before `?q=` works): ChatGPT,
+  Claude, You.com. **Kept** as LLM engines: Perplexity, Phind.
+- **Removed** SearXNG (federated — `searx.be` is anti-bot-locked and every
+  single-instance default rots as instances rate-limit / die). Users who
+  want it add their preferred instance via the custom URL form.
+- **Added** as `tier:"extra"`: Marginalia, Stract, Yep, Presearch, MetaGer,
+  Qwant, Swisscows, Naver, Baidu. All non-login `?q=` URLs. Same rot rule
+  as LLMs: if one starts bouncing to a login gate, drop it.
+- Files: [main.js](main.js).
+
+### Search picker
+
+- [engine-picker.html](engine-picker.html) renders two headed groups:
+  "Search with" / "Ask an AI". Empty sections hidden.
+- [settings.html](settings.html) default-engine `<select>` groups options
+  with `<optgroup>` by kind. Drag-reorder constrained to same-kind (a
+  cross-kind drop would re-group on next render).
+
+### Chrome / toolbar
+
+- **Loadbar collapses to 0px when idle** (`.loadbar { height: 0 }`,
+  `.loadbar.on { height: 2px }`, 120ms transition). Previously reserved
+  a permanent 2px strip below the address bar.
+- **Downloads button** (`#downloads`) between the search box and Tor
+  toggle. Subscribes to `onDownloads` for badge + spin/done/err class.
+- Files: [chrome.html](chrome.html).
+
+### Downloads (new feature)
+
+- New files: [downloads.html](downloads.html),
+  [downloads-preload.js](downloads-preload.js). Both added to
+  `build.files` in [package.json](package.json).
+- `installDownloadTracker()` in main.js hooks
+  `session.defaultSession.on("will-download", …)`. In-memory list only;
+  no cross-session persistence.
+- IPC surface: `downloads-get`, `toggle-downloads`, `close-downloads`,
+  `downloads-resize`, `download-open`, `download-show`, `download-cancel`,
+  `download-clear`, `downloads-clear-all`.
+- New `downloadsPop` WebContentsView, positioned via `positionDownloads()`
+  from `layout()`.
+- Preload exposes `getDownloads`, `toggleDownloads`, `onDownloads`.
+
+### Preview harness
+
+- [_preview.html](_preview.html) — `window.DL_ITEMS` seed +
+  `__toggleDownloads` overlay; stub `window.theseus.getDownloads /
+  onDownloads / toggleDownloads`; `kind` on stub engines; LLM catalog
+  trimmed to Perplexity + Phind.
+- [_settings-preview.html](_settings-preview.html) — `kind` on stub
+  engines; LLM catalog trimmed.
+
+---
+
+## session: `parallel:collision-policy`
+
+Owner's focus: BCNR ↔ ICANN name collision handling. Present in the
+working tree, not mine. Leave for that session to land or bundle by
+explicit ask.
+
+### Chrome + main-process changes
+
+- [main.js](main.js) — big block of new IPC around collision policy +
+  soft-collision picker + electrum discovery.
+- [popover.html](popover.html), [popover-preload.js](popover-preload.js)
+  — collision switcher on the site-info popover.
+- [preload.js](preload.js) — `collisionSwitch` + `collisionState`.
+- [settings-preload.js](settings-preload.js) — same.
+
+### Settings
+
+- Entire **Naming** section in [settings.html](settings.html) (BCNR/ICANN
+  collision policy radio group + remembered choices reset button).
+  Untouched by my changes.
+
+### New files (untracked in git)
+
+- [collision.html](collision.html), [collision-preload.js](collision-preload.js)
+  — the soft-collision "Open with…" prompt window (referenced from
+  `main.js:219`).
+
+---
+
+## Live state
+
+Shipped hashes live at `../site/releases-manifest.json` and
+`https://dl.silentmode.st/releases-manifest.json`. On-chain pointer at
+`releases.silentmode.bch`. See [GOTCHAS.md](GOTCHAS.md) for the release
+gotchas.

downloads-preload.js

@@ -0,0 +1,11 @@
+const { contextBridge, ipcRenderer } = require("electron");
+contextBridge.exposeInMainWorld("dl", {
+  onDownloads: (cb) => ipcRenderer.on("downloads", (_e, d) => cb(d)),
+  close: () => ipcRenderer.invoke("close-downloads"),
+  resize: (h) => ipcRenderer.invoke("downloads-resize", h),
+  open: (id) => ipcRenderer.invoke("download-open", id),
+  show: (id) => ipcRenderer.invoke("download-show", id),
+  cancel: (id) => ipcRenderer.invoke("download-cancel", id),
+  clear: (id) => ipcRenderer.invoke("download-clear", id),
+  clearAll: () => ipcRenderer.invoke("downloads-clear-all"),
+});

downloads.html

@@ -0,0 +1,101 @@
+<!doctype html>
+<html><head><meta charset="utf-8">
+<style>
+  :root { color-scheme: light dark; font-family: system-ui, sans-serif; }
+  html, body { margin: 0; background: transparent; }
+  .menu { background: #1c222c; border: 1px solid #ffffff26; border-radius: 10px; box-shadow: 0 12px 34px #000c; overflow: hidden; color: #e7eaf1; }
+  .head { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px 6px; border-bottom: 1px solid #ffffff12; }
+  .head .t { font-size: 11px; letter-spacing: .04em; text-transform: uppercase; color: #8b98a9; }
+  .head .clr { font-size: 11.5px; color: #8b98a9; background: transparent; border: none; cursor: pointer; padding: 2px 6px; border-radius: 4px; }
+  .head .clr:hover { background: #ffffff10; color: #e7eaf1; }
+  .head .clr[disabled] { opacity: .35; cursor: default; }
+  .list { max-height: 380px; overflow-y: auto; }
+  .empty { padding: 22px 14px; text-align: center; color: #7f8aa0; font-size: 12.5px; }
+  .row { padding: 10px 14px; border-bottom: 1px solid #ffffff08; font-size: 12.5px; }
+  .row:last-child { border-bottom: 0; }
+  .row .top { display: flex; align-items: center; gap: 8px; }
+  .row .fn { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: #e7eaf1; font-weight: 500; }
+  .row .st { font-size: 10.5px; color: #7f8aa0; }
+  .row .st.err { color: #f6768a; }
+  .row .st.ok { color: #4fd1a5; }
+  .row .mt { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 4px; color: #7f8aa0; font-size: 11px; }
+  .bar { height: 4px; background: #ffffff10; border-radius: 999px; overflow: hidden; margin-top: 6px; }
+  .bar > i { display: block; height: 100%; background: linear-gradient(90deg, #4b7bec, #d6ff3d); border-radius: 999px; transition: width .18s linear; }
+  .bar.indet > i { width: 35%; animation: slide 1.1s infinite linear; }
+  @keyframes slide { 0% { transform: translateX(-110%); } 100% { transform: translateX(400%); } }
+  .btns { display: flex; gap: 4px; }
+  .btn { background: transparent; border: none; color: #8b98a9; cursor: pointer; padding: 2px 5px; border-radius: 4px; font-size: 12px; }
+  .btn:hover { background: #ffffff10; color: #e7eaf1; }
+  .btn.rm:hover { color: #f6768a; }
+  @media (prefers-color-scheme: light) {
+    .menu { background: #ffffff; border-color: rgba(0,0,0,.15); color: #1a1f28; }
+    .head { border-bottom-color: rgba(0,0,0,.08); }
+    .head .t, .row .st, .row .mt, .empty, .btn { color: #7b8494; }
+    .head .clr:hover, .btn:hover { background: rgba(0,0,0,.05); color: #1a1f28; }
+    .row .fn { color: #1a1f28; }
+    .row { border-bottom-color: rgba(0,0,0,.06); }
+    .bar { background: rgba(0,0,0,.08); }
+  }
+</style></head>
+<body>
+  <div class="menu">
+    <div class="head">
+      <span class="t">Downloads</span>
+      <button class="clr" id="clr" disabled>Clear finished</button>
+    </div>
+    <div class="list" id="list"></div>
+  </div>
+<script>
+  const $ = (id) => document.getElementById(id);
+  const esc = (s) => String(s || "").replace(/</g, "&lt;").replace(/"/g, "&quot;");
+  const fmt = (n) => {
+    n = Number(n) || 0;
+    if (n < 1024) return n + " B";
+    if (n < 1024 * 1024) return (n / 1024).toFixed(1) + " KB";
+    if (n < 1024 * 1024 * 1024) return (n / (1024 * 1024)).toFixed(1) + " MB";
+    return (n / (1024 * 1024 * 1024)).toFixed(2) + " GB";
+  };
+  function report() { requestAnimationFrame(() => { try { window.dl.resize(document.querySelector(".menu").offsetHeight); } catch (e) {} }); }
+  window.dl.onDownloads((items) => {
+    const list = $("list");
+    const has = items && items.length;
+    $("clr").disabled = !has || !items.some((d) => d.state !== "progressing");
+    if (!has) {
+      list.innerHTML = `<div class="empty">No downloads yet.</div>`;
+      report(); return;
+    }
+    list.innerHTML = items.map((d) => {
+      const done = d.state === "completed";
+      const err = d.state === "interrupted";
+      const cancel = d.state === "cancelled";
+      const inflight = d.state === "progressing" || d.state === "paused";
+      const pct = d.total > 0 ? Math.min(100, Math.round((d.received / d.total) * 100)) : 0;
+      const barStyle = d.total > 0 ? `width:${pct}%` : "width:35%";
+      const barClass = inflight && d.total === 0 ? "bar indet" : "bar";
+      const statusText = done ? "Done" : err ? "Failed" : cancel ? "Cancelled" : (d.total > 0 ? pct + "%" : "…");
+      const statusCls = done ? "st ok" : (err || cancel) ? "st err" : "st";
+      const sizeText = d.total > 0
+        ? `${fmt(d.received)} / ${fmt(d.total)}`
+        : (d.received > 0 ? fmt(d.received) : "");
+      const actions = inflight
+        ? `<button class="btn" data-cancel="${d.id}" title="Cancel">✕</button>`
+        : (done
+          ? `<button class="btn" data-open="${d.id}" title="Open">Open</button>
+             <button class="btn" data-show="${d.id}" title="Show in folder">Folder</button>
+             <button class="btn rm" data-clear="${d.id}" title="Remove from list">✕</button>`
+          : `<button class="btn rm" data-clear="${d.id}" title="Remove from list">✕</button>`);
+      return `<div class="row">
+        <div class="top"><span class="fn" title="${esc(d.filename)}">${esc(d.filename)}</span><span class="${statusCls}">${statusText}</span></div>
+        ${inflight || d.total > 0 ? `<div class="${barClass}"><i style="${barStyle}"></i></div>` : ""}
+        <div class="mt"><span>${esc(sizeText)}</span><span class="btns">${actions}</span></div>
+      </div>`;
+    }).join("");
+    for (const el of list.querySelectorAll("[data-open]"))  el.onclick = () => window.dl.open(+el.dataset.open);
+    for (const el of list.querySelectorAll("[data-show]"))  el.onclick = () => window.dl.show(+el.dataset.show);
+    for (const el of list.querySelectorAll("[data-cancel]"))el.onclick = () => window.dl.cancel(+el.dataset.cancel);
+    for (const el of list.querySelectorAll("[data-clear]")) el.onclick = () => window.dl.clear(+el.dataset.clear);
+    report();
+  });
+  $("clr").onclick = () => window.dl.clearAll();
+</script>
+</body></html>

engine-picker.html

@@ -21,8 +21,7 @@
 </style></head>
 <body>
   <div class="menu">
-    <div class="hdr">Search with</div>
+    <div id="groups"></div>
-    <div id="list"></div>
     <div class="sep"></div>
     <div class="foot">
       <div class="item" id="settings"><span class="ic"><span class="em">⚙️</span></span><span class="nm">Search settings…</span></div>
@@ -32,16 +31,27 @@
   const $ = (id) => document.getElementById(id);
   const esc = (s) => String(s || "").replace(/</g, "&lt;");
   function report() { requestAnimationFrame(() => { try { window.picker.resize(document.querySelector(".menu").offsetHeight); } catch (e) {} }); }
-  window.picker.onData ? null : null;
+  const KINDS = [
+    { key: "search", label: "Search with" },
+    { key: "llm",    label: "Ask an AI"   },
+  ];
+  const row = (e, current) => {
+    const ic = e.favicon
+      ? `<img src="${esc(e.favicon)}" onerror="this.replaceWith(Object.assign(document.createElement('span'),{className:'em',textContent:'${(e.sym||'🔍')}'}))">`
+      : `<span class="em">${e.sym || "🔍"}</span>`;
+    return `<div class="item" data-id="${esc(e.id)}"><span class="ic">${ic}</span><span class="nm">${esc(e.name)}</span>${e.id === current ? '<span class="chk">✓</span>' : ""}</div>`;
+  };
   window.picker.onEngines((d) => {
-    const list = $("list");
+    const engines = d.engines || [];
-    list.innerHTML = (d.engines || []).map((e) => {
+    const groups = $("groups");
-      const ic = e.favicon
+    // Preserve engineOrder within each kind (engines already come sorted).
-        ? `<img src="${esc(e.favicon)}" onerror="this.replaceWith(Object.assign(document.createElement('span'),{className:'em',textContent:'${(e.sym||'🔍')}'}))">`
+    const sections = KINDS.map(({ key, label }) => {
-        : `<span class="em">${e.sym || "🔍"}</span>`;
+      const rows = engines.filter((e) => (e.kind || "search") === key).map((e) => row(e, d.current)).join("");
-      return `<div class="item" data-id="${esc(e.id)}"><span class="ic">${ic}</span><span class="nm">${esc(e.name)}</span>${e.id === d.current ? '<span class="chk">✓</span>' : ""}</div>`;
+      if (!rows) return ""; // hide a section with no engines
+      return `<div class="hdr">${label}</div>${rows}`;
     }).join("");
-    list.querySelectorAll(".item").forEach((el) => el.onclick = () => window.picker.pick(el.dataset.id));
+    groups.innerHTML = sections;
+    groups.querySelectorAll(".item").forEach((el) => el.onclick = () => window.picker.pick(el.dataset.id));
     report();
   });
   $("settings").onclick = () => window.picker.openSettings();

main.js

@@ -24,28 +24,43 @@ const RESOLVER = app.isPackaged
 // Built-in engines. Users can also add their own (settings.customEngines,
 // each { id, name, url } where the url contains "%s" for the query).
 // Catalog of built-in engines (users pick which to enable + can add their own).
-// fav = the domain to load a real favicon from; sym = emoji fallback.
+// fav  = the domain to load a real favicon from; sym = emoji fallback.
 // kind = "search" (traditional search engines) or "llm" (AI answer engines).
-// The picker + settings render each kind in its own section; kind stays a
+// tier = "catalog" (curated first-class options shown in the primary Add
-// display-only grouping (URL routing is the same for both).
+//        panel) or "extra" (a wider bank hidden behind a filter box for
+//        discovery). Missing tier defaults to "catalog".
+// URL routing is identical for all — kind and tier are display-only grouping.
 const SEARCH_ENGINES = {
-  duckduckgo: { kind: "search", name: "DuckDuckGo", sym: "🦆", fav: "duckduckgo.com",     url: (q) => "https://duckduckgo.com/?q=" + encodeURIComponent(q) },
+  duckduckgo: { kind: "search", tier: "catalog", name: "DuckDuckGo", sym: "🦆", fav: "duckduckgo.com",     url: (q) => "https://duckduckgo.com/?q=" + encodeURIComponent(q) },
-  google:     { kind: "search", name: "Google",     sym: "🔵", fav: "www.google.com",     url: (q) => "https://www.google.com/search?q=" + encodeURIComponent(q) },
+  google:     { kind: "search", tier: "catalog", name: "Google",     sym: "🔵", fav: "www.google.com",     url: (q) => "https://www.google.com/search?q=" + encodeURIComponent(q) },
-  brave:      { kind: "search", name: "Brave",      sym: "🦁", fav: "search.brave.com",   url: (q) => "https://search.brave.com/search?q=" + encodeURIComponent(q) },
+  brave:      { kind: "search", tier: "catalog", name: "Brave",      sym: "🦁", fav: "search.brave.com",   url: (q) => "https://search.brave.com/search?q=" + encodeURIComponent(q) },
-  bing:       { kind: "search", name: "Bing",       sym: "🔎", fav: "www.bing.com",       url: (q) => "https://www.bing.com/search?q=" + encodeURIComponent(q) },
+  bing:       { kind: "search", tier: "catalog", name: "Bing",       sym: "🔎", fav: "www.bing.com",       url: (q) => "https://www.bing.com/search?q=" + encodeURIComponent(q) },
-  startpage:  { kind: "search", name: "Startpage",  sym: "🛡️", fav: "www.startpage.com",  url: (q) => "https://www.startpage.com/sp/search?query=" + encodeURIComponent(q) },
+  startpage:  { kind: "search", tier: "catalog", name: "Startpage",  sym: "🛡️", fav: "www.startpage.com",  url: (q) => "https://www.startpage.com/sp/search?query=" + encodeURIComponent(q) },
-  yandex:     { kind: "search", name: "Yandex",     sym: "🔴", fav: "yandex.com",         url: (q) => "https://yandex.com/search/?text=" + encodeURIComponent(q) },
+  yandex:     { kind: "search", tier: "catalog", name: "Yandex",     sym: "🔴", fav: "yandex.com",         url: (q) => "https://yandex.com/search/?text=" + encodeURIComponent(q) },
-  ecosia:     { kind: "search", name: "Ecosia",     sym: "🌱", fav: "www.ecosia.org",     url: (q) => "https://www.ecosia.org/search?q=" + encodeURIComponent(q) },
+  ecosia:     { kind: "search", tier: "catalog", name: "Ecosia",     sym: "🌱", fav: "www.ecosia.org",     url: (q) => "https://www.ecosia.org/search?q=" + encodeURIComponent(q) },
-  mojeek:     { kind: "search", name: "Mojeek",     sym: "🧭", fav: "www.mojeek.com",     url: (q) => "https://www.mojeek.com/search?q=" + encodeURIComponent(q) },
+  mojeek:     { kind: "search", tier: "catalog", name: "Mojeek",     sym: "🧭", fav: "www.mojeek.com",     url: (q) => "https://www.mojeek.com/search?q=" + encodeURIComponent(q) },
   // SearXNG is federated (dozens of public instances at searx.space); any single
   // default becomes stale as instances rate-limit / die (searx.be is anti-bot-locked).
   // Users who want SearXNG add their preferred instance via the custom URL form.
-  wikipedia:  { kind: "search", name: "Wikipedia",  sym: "📖", fav: "en.wikipedia.org",   url: (q) => "https://en.wikipedia.org/wiki/Special:Search?search=" + encodeURIComponent(q) },
+  wikipedia:  { kind: "search", tier: "catalog", name: "Wikipedia",  sym: "📖", fav: "en.wikipedia.org",   url: (q) => "https://en.wikipedia.org/wiki/Special:Search?search=" + encodeURIComponent(q) },
   // AI / LLM answer engines that ANSWER the URL query without requiring a login.
   // ChatGPT / Claude / You.com's youchat all bounce to sign-in before running
   // ?q=, so they'd fail silently as a "search engine" — omitted deliberately.
-  perplexity: { kind: "llm",    name: "Perplexity", sym: "🧠", fav: "www.perplexity.ai",  url: (q) => "https://www.perplexity.ai/search?q=" + encodeURIComponent(q) },
+  perplexity: { kind: "llm",    tier: "catalog", name: "Perplexity", sym: "🧠", fav: "www.perplexity.ai",  url: (q) => "https://www.perplexity.ai/search?q=" + encodeURIComponent(q) },
-  phind:      { kind: "llm",    name: "Phind",      sym: "🧑‍💻", fav: "www.phind.com",     url: (q) => "https://www.phind.com/search?q=" + encodeURIComponent(q) },
+  phind:      { kind: "llm",    tier: "catalog", name: "Phind",      sym: "🧑‍💻", fav: "www.phind.com",     url: (q) => "https://www.phind.com/search?q=" + encodeURIComponent(q) },
+  // ---- Extras: wider bank, discoverable via the Search filter box in Settings.
+  // These are known-working engines that don't require sign-in on ?q= but aren't
+  // first-class enough to sit in the primary catalog. Keep the list vetted — if
+  // an entry starts bouncing to a login gate, drop it (same rule as the LLMs).
+  marginalia:  { kind: "search", tier: "extra", name: "Marginalia",   sym: "🕸", fav: "search.marginalia.nu", url: (q) => "https://search.marginalia.nu/search?query=" + encodeURIComponent(q) },
+  stract:      { kind: "search", tier: "extra", name: "Stract",       sym: "🧵", fav: "stract.com",           url: (q) => "https://stract.com/search?q=" + encodeURIComponent(q) },
+  yep:         { kind: "search", tier: "extra", name: "Yep",          sym: "✳️", fav: "yep.com",              url: (q) => "https://yep.com/web?q=" + encodeURIComponent(q) },
+  presearch:   { kind: "search", tier: "extra", name: "Presearch",    sym: "🔷", fav: "presearch.com",        url: (q) => "https://presearch.com/search?q=" + encodeURIComponent(q) },
+  metager:     { kind: "search", tier: "extra", name: "MetaGer",      sym: "🇩🇪", fav: "metager.org",           url: (q) => "https://metager.org/meta/meta.ger3?eingabe=" + encodeURIComponent(q) },
+  qwant:       { kind: "search", tier: "extra", name: "Qwant",        sym: "🇫🇷", fav: "www.qwant.com",         url: (q) => "https://www.qwant.com/?q=" + encodeURIComponent(q) },
+  swisscows:   { kind: "search", tier: "extra", name: "Swisscows",    sym: "🐄", fav: "swisscows.com",         url: (q) => "https://swisscows.com/en/web?query=" + encodeURIComponent(q) },
+  naver:       { kind: "search", tier: "extra", name: "Naver",        sym: "🇰🇷", fav: "www.naver.com",         url: (q) => "https://search.naver.com/search.naver?query=" + encodeURIComponent(q) },
+  baidu:       { kind: "search", tier: "extra", name: "Baidu",        sym: "🇨🇳", fav: "www.baidu.com",         url: (q) => "https://www.baidu.com/s?wd=" + encodeURIComponent(q) },
 };
 // Engines enabled by default (shown in the toolbar dropdown). The rest are in the
 // catalog and can be turned on from Settings. Custom + detected engines are always on.
@@ -59,9 +74,9 @@ function isEnabled(id) { return (settings.enabledEngines || DEFAULT_ENABLED).inc
 // enabledEngines; custom engines are always enabled.
 function allEngines() {
   const list = Object.entries(SEARCH_ENGINES).map(([id, e]) =>
-    ({ id, name: e.name, sym: e.sym, favicon: faviconUrl(e.fav), kind: e.kind || "search", builtin: true, enabled: isEnabled(id) }));
+    ({ id, name: e.name, sym: e.sym, favicon: faviconUrl(e.fav), kind: e.kind || "search", tier: e.tier || "catalog", builtin: true, enabled: isEnabled(id) }));
   for (const c of settings.customEngines || [])
-    list.push({ id: c.id, name: c.name, sym: c.sym || "🔍", favicon: customFavicon(c.url), kind: c.kind || "search", builtin: false, enabled: true });
+    list.push({ id: c.id, name: c.name, sym: c.sym || "🔍", favicon: customFavicon(c.url), kind: c.kind || "search", tier: "custom", builtin: false, enabled: true });
   // Apply the user's custom order; ids not in engineOrder keep their natural order (stable sort).
   const order = settings.engineOrder || [];
   return list.slice().sort((a, b) => {

settings.html

@@ -179,15 +179,23 @@
           <button id="engAddBtn" class="btn" type="button">+ Add search engine</button>
         </div>
         <div id="engineList"></div>
-        <!-- Catalog: hidden until "Add" is clicked. Shows built-in engines the user
+        <!-- Catalog: hidden until "Add" is clicked. Three tiers, top to bottom:
-             hasn't enabled + a custom-URL form. -->
+             1. curated built-ins the user hasn't enabled (tier="catalog")
+             2. wider bank filtered by a search box (tier="extra")
+             3. custom-URL form -->
         <div id="engineCatalog" class="engcat" hidden>
           <div class="ehdr">Add from catalog</div>
           <div id="catalogList"></div>
+          <div class="ehdr" style="display:flex;align-items:center;justify-content:space-between;gap:8px">
+            <span>Discover more engines</span>
+            <input id="engineFilter" type="search" placeholder="Filter by name…" autocomplete="off"
+                   style="background:#1b2330;color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:4px 8px;font-size:12px;min-width:auto;width:170px">
+          </div>
+          <div id="extraList"></div>
           <div class="ehdr">Or add a custom URL</div>
           <div class="addeng">
             <input id="engSym" placeholder="🔍" style="max-width:52px;text-align:center;flex:none">
-            <input id="engName" placeholder="Name (e.g. SearXNG)">
+            <input id="engName" placeholder="Name (e.g. My SearXNG)">
             <input id="engUrl" placeholder="https://example.com/search?q=%s">
             <button id="engAdd" class="btn">Add</button>
           </div>
@@ -366,20 +374,41 @@
         if (!rows) return "";
         return `<div class="ehdr">${label}</div>${rows}`;
       }).join("");
-      // Catalog = built-in engines the user has NOT enabled, ready to add.
+      // Two catalog panes, split by tier:
+      //   catalog — curated first-class built-ins the user hasn't enabled
+      //   extra   — wider bank, filtered live by the "Discover more" search box
       const cat = document.getElementById("catalogList");
+      const extra = document.getElementById("extraList");
+      const filterInput = document.getElementById("engineFilter");
+      const catRow = (e) => `<div class="cat" data-id="${e.id}">` +
+        `<span class="eic">${engIcon(e)}</span>` +
+        `<span class="enm">${esc(e.name)}</span>` +
+        `<span class="kind">${(e.kind || "search") === "llm" ? "AI" : "Search"}</span>` +
+        `<button class="add" data-add="${e.id}">+ Add</button></div>`;
+      const off = d.engines.filter((e) => e.builtin && !e.enabled);
+      const catalogOff = off.filter((e) => (e.tier || "catalog") === "catalog");
+      const extraOff   = off.filter((e) => e.tier === "extra");
       if (cat) {
-        const off = d.engines.filter((e) => e.builtin && !e.enabled);
+        cat.innerHTML = catalogOff.length
-        const catRow = (e) => `<div class="cat" data-id="${e.id}">` +
+          ? catalogOff.map(catRow).join("")
-          `<span class="eic">${engIcon(e)}</span>` +
+          : `<div class="cempty2">All curated engines are enabled. Discover more below or add a custom URL.</div>`;
-          `<span class="enm">${esc(e.name)}</span>` +
-          `<span class="kind">${(e.kind || "search") === "llm" ? "AI" : "Search"}</span>` +
-          `<button class="add" data-add="${e.id}">+ Add</button></div>`;
-        cat.innerHTML = off.length
-          ? off.map(catRow).join("")
-          : `<div class="cempty2">All built-in engines are enabled. Add a custom URL below.</div>`;
         cat.querySelectorAll(".add").forEach((b) => b.onclick = () => C.setEngineEnabled(b.dataset.add, true).then(renderEngines));
       }
+      if (extra) {
+        const paintExtras = (q) => {
+          const filt = String(q || "").trim().toLowerCase();
+          const shown = filt ? extraOff.filter((e) => e.name.toLowerCase().includes(filt)) : extraOff;
+          extra.innerHTML = shown.length
+            ? shown.map(catRow).join("")
+            : `<div class="cempty2">${filt ? "No engines match that filter." : "All discoverable engines are enabled."}</div>`;
+          extra.querySelectorAll(".add").forEach((b) => b.onclick = () => C.setEngineEnabled(b.dataset.add, true).then(renderEngines));
+        };
+        paintExtras(filterInput ? filterInput.value : "");
+        if (filterInput && !filterInput.dataset.wired) {
+          filterInput.dataset.wired = "1";
+          filterInput.addEventListener("input", () => paintExtras(filterInput.value));
+        }
+      }
       list.querySelectorAll('input[type="checkbox"]').forEach((cb) => cb.onchange = () => C.setEngineEnabled(cb.dataset.id, cb.checked).then(renderEngines));
       list.querySelectorAll(".cx").forEach((b) => b.onclick = () => C.removeEngine(b.dataset.id).then(renderEngines));
       // drag-and-drop reorder — same-kind only (dropping a Search engine into