Merge pull request 'Feat/binary management and library scale' (#6) from feat/binary-management-and-library-scale into main

Reviewed-on: #6

ROADMAP-PINCHFLAT.md

@@ -16,6 +16,9 @@ Sources: [Pinchflat GitHub](https://github.com/kieraneglin/pinchflat) ·
 [Pinchflat architecture (DeepWiki)](https://deepwiki.com/kieraneglin/pinchflat) ·
 [Pinchflat FAQ — indexing](https://github.com/kieraneglin/pinchflat/wiki/Frequently-Asked-Questions).
 
+> **See also:** [ROADMAP.md](ROADMAP.md) → **Post-parity** — YTDLnis-derived editing features,
+> Windows-native polish, and reliability work, Phases L onward.
+
 ---
 
 ## Implementation status — Phases F–K shipped (2026-06-23)
@@ -88,14 +91,14 @@ user indexes many large channels and the JSON files get unwieldy (noted as a Pha
 Make AeroFetch able to *enumerate and remember* a whole channel without downloading anything
 yet. This is the prerequisite for every later phase.
 
-- [ ] **Channel-depth probe.** Extend `src/main/probe.ts` so a channel URL (`/@handle`,
+- [x] **Channel-depth probe.** Extend `src/main/probe.ts` so a channel URL (`/@handle`,
       `/channel/<id>`, `/c/<name>`, `/user/<name>`) resolves to a new `kind: 'channel'`
       `ProbeResult`. Today `buildPlaylist` reads `data.entries` one level deep and ignores the
       nesting a channel returns (the channel's tabs/playlists). Walk channel → playlists →
       videos: probe `…/playlists` (flat) for the playlist list, plus a synthetic **"Uploads"**
       playlist from `…/videos` for videos that belong to no playlist. Lazy-probe each
       playlist's video list on demand rather than all up front.
-- [ ] **Persisted index.** New `src/main/sources.ts` (plain JSON, mirrors `src/main/history.ts`)
+- [x] **Persisted index.** New `src/main/sources.ts` (plain JSON, mirrors `src/main/history.ts`)
       storing `Source` + `MediaItem` records. New IPC types in `src/shared/ipc.ts`:
       ```ts
       interface Source {
@@ -119,11 +122,11 @@ yet. This is the prerequisite for every later phase.
         filePath?: string
       }
       ```
-- [ ] **Dedup on index.** A video appearing in multiple playlists collapses to one `MediaItem`
+- [x] **Dedup on index.** A video appearing in multiple playlists collapses to one `MediaItem`
       (keyed by video id); first playlist seen wins the folder assignment (surface this choice
       in the UI so the user can reassign). The "Uploads" synthetic playlist catches anything in
       no real playlist.
-- [ ] **Index job.** Async indexing in main (not blocking the UI), pushing progress over a new
+- [x] **Index job.** Async indexing in main (not blocking the UI), pushing progress over a new
       IPC channel (`index:progress`) the way `download.ts` pushes download events — "indexed
       N of M playlists." Reuse `cleanError` and the same `assertHttpUrl` guard.
 
@@ -131,13 +134,13 @@ yet. This is the prerequisite for every later phase.
 
 Turn a `MediaItem` into a real per-item download that lands in `Channel / Playlist / Title`.
 
-- [ ] **Per-item output subpath.** `StartDownloadOptions.outputDir` is *already* plumbed through
+- [x] **Per-item output subpath.** `StartDownloadOptions.outputDir` is *already* plumbed through
       `buildCommand` (`src/main/download.ts`). Add an `outputSubdir` (or reuse `outputDir` with a
       joined subpath) so each `MediaItem` downloads into
       `<root>/<Channel>/<Playlist>/<NNN> - <Title>.ext`. The `NNN` index comes from
       `MediaItem.playlistIndex` (computed at index time) — **not** `%(playlist_index)s`, which is
       empty under the per-item `--no-playlist` path that AeroFetch keeps using.
-- [ ] **Directory sanitizer.** A small helper in `buildArgs.ts` that strips Windows-illegal
+- [x] **Directory sanitizer.** A small helper in `buildArgs.ts` that strips Windows-illegal
       directory chars (`< > : " / \ | ? *`, trailing dots/spaces, reserved names like `CON`).
       Critical because `--restrict-filenames` only sanitizes the *filename* yt-dlp generates,
       not the directory segments AeroFetch constructs from channel/playlist names.
@@ -155,31 +158,31 @@ Turn a `MediaItem` into a real per-item download that lands in `Channel / Playli
 
 The new surface where channels live. Everything below feeds the **existing** download queue.
 
-- [ ] **"Library" sidebar section** (`src/renderer/src/components/Sidebar.tsx`) alongside
+- [x] **"Library" sidebar section** (`src/renderer/src/components/Sidebar.tsx`) alongside
       Downloads / History / Settings. Lists added Sources.
-- [ ] **Source detail — playlist/video tree.** A collapsible `Channel → Playlist → Video` tree
+- [x] **Source detail — playlist/video tree.** A collapsible `Channel → Playlist → Video` tree
       showing each `MediaItem`'s state (indexed · pending · downloading · downloaded · error),
       reusing the checkbox-selection pattern already in `DownloadBar.tsx`'s playlist panel.
       Per-playlist select-all, live counts.
-- [ ] **"Download all pending" → existing queue, batched.** Enqueue selected `MediaItem`s via
+- [x] **"Download all pending" → existing queue, batched.** Enqueue selected `MediaItem`s via
       the existing `addFromUrl` path, **a batch at a time** (e.g. 50) so the queue/store never
       holds the entire channel at once — the live queue stays small while the Library view is the
       source of truth for the full list. Completion flips `MediaItem.downloaded = true` and
       records to history exactly as today.
-- [ ] **New `useSources` store** (`src/renderer/src/store/sources.ts`, mirrors
+- [x] **New `useSources` store** (`src/renderer/src/store/sources.ts`, mirrors
       `store/downloads.ts` / `store/history.ts`) plus its IPC bridge. Browser-preview seed data
       so the view is demoable without Electron (same convention as `downloads.ts`'s `PREVIEW`).
-- [ ] **Risk to watch:** rendering a 2,000-row tree. Virtualize the list (or cap + paginate) and,
+- [x] **Risk to watch:** rendering a 2,000-row tree. Virtualize the list (or cap + paginate) and,
       if JSON-store load times bite, revisit the Phase-D better-sqlite3 decision.
 
 ## Phase I — Incremental sync & dedup ✅ COMPLETE
 
 Re-running a channel should grab only what's new — the everyday media-manager loop.
 
-- [ ] **Re-index = diff.** Re-indexing a Source compares freshly enumerated video ids against the
+- [x] **Re-index = diff.** Re-indexing a Source compares freshly enumerated video ids against the
       persisted `MediaItem`s and marks only the new ones; existing records (and their
       `downloaded` state) are preserved. "X new since last sync" badge.
-- [ ] **"Download new only."** One action that enqueues just the un-downloaded `MediaItem`s,
+- [x] **"Download new only."** One action that enqueues just the un-downloaded `MediaItem`s,
       backed by the existing **`--download-archive`** setting (`Settings.downloadArchive`,
       `getDownloadArchivePath()`) as a second, yt-dlp-level dedup guard so even a stale index
       can't re-download.
@@ -192,14 +195,14 @@ Pinchflat's headline feature: a Source you *watch*, that downloads new uploads o
 AeroFetch already has the Windows pieces for this elsewhere in this workspace (Task Scheduler +
 single-instance Mutex + a headless run mode — see the DashMail/Weather Radar patterns).
 
-- [ ] **Watched sources.** A `Source.watched` flag + an "auto-download new" toggle per source.
+- [x] **Watched sources.** A `Source.watched` flag + an "auto-download new" toggle per source.
-- [ ] **Fast indexing via RSS.** YouTube exposes a per-channel Atom feed
+- [x] **Fast indexing via RSS.** YouTube exposes a per-channel Atom feed
       (`https://www.youtube.com/feeds/videos.xml?channel_id=<id>`) — a cheap check for new
       uploads without a full yt-dlp scan. **Caveat:** the feed only carries the latest ~15
       videos, so RSS is for *staying current*, not initial indexing (which stays a full
       Phase-F scan). Pinchflat draws the same line ("fast indexing is not recommended for
       playlists / initial scans").
-- [ ] **Scheduled headless run.** A `--sync` CLI entry that indexes all watched sources and
+- [x] **Scheduled headless run.** A `--sync` CLI entry that indexes all watched sources and
       enqueues new items, wired to **Windows Task Scheduler** (reuse the
       single-instance-lock already added in Phase E so a scheduled run hands off to a running
       window instead of double-launching). Notify on new downloads via the existing
@@ -210,7 +213,7 @@ single-instance Mutex + a headless run mode — see the DashMail/Weather Radar p
 Make AeroFetch's output drop-in for Jellyfin/Plex/Kodi the way Pinchflat does — relevant
 because organized channel folders are exactly what those servers ingest.
 
-- [ ] **Sidecar metadata.** `--write-info-json`, `--write-thumbnail`, `--write-description`,
+- [x] **Sidecar metadata.** `--write-info-json`, `--write-thumbnail`, `--write-description`,
       and optional Kodi/Jellyfin `.nfo` generation. Most of this is already expressible through
       Phase C custom-command args; a checkbox group in the output settings makes it first-class.
 

ROADMAP.md

@@ -13,6 +13,9 @@ Sources: [Seal GitHub](https://github.com/JunkFood02/Seal) ·
 > AeroFetch from a one-shot downloader into a [Pinchflat](https://github.com/kieraneglin/pinchflat)-style
 > media manager (index entire channels → organize into `Channel / Playlist / Title` folders →
 > keep in sync), reusing the existing queue/history/options rather than replacing them.
+>
+> **Post-parity work** (YTDLnis-derived editing features + Windows-native/UX polish + reliability)
+> is tracked at the end of this document under **Post-parity** (Phases L onward).
 
 ---
 
@@ -163,7 +166,7 @@ parallel storage. All items verified in the UI preview (typecheck + `npm run tes
       non-zero yt-dlp exit); **Settings → Diagnostics** lists recent entries with
       **Copy full report** and **Clear log**.
 
-## Phase E — Theming & platform polish
+## Phase E — Theming & platform polish ✅ COMPLETE
 
 Some items are Android-specific in Seal and adapted to Windows here.
 
@@ -184,10 +187,6 @@ Some items are Android-specific in Seal and adapted to Windows here.
       auto. Verified in the UI preview (typecheck + `npm run test` clean): default Toffee,
       switching to Slate/Evergreen/Lavender, Light/Dark/Follow-system, and the sidebar
       toggle's break-out-of-system behavior all checked visually.
-- [ ] **i18n / language setting** (Seal ships ~40 languages). Large but optional — deferred,
-      since shipping ~40 real translations isn't something to fake; doing this properly means
-      wiring up an i18n library + extracting every string now, with translation content
-      arriving incrementally from contributors.
 - [x] **Windows "open with" / share integration.** Both mechanisms named above, since a Win32
       (non-MSIX) app can't register as an actual Share Target:
       - **`aerofetch://` protocol** (`aerofetch://download?url=<encoded>`) — registered at
@@ -234,3 +233,208 @@ Some items are Android-specific in Seal and adapted to Windows here.
   + Explorer "Send to" integration (a true Share Target needs an MSIX package, out of scope
   for this app's NSIS/portable distribution).
 - F-Droid distribution → N/A (AeroFetch ships NSIS + portable).
+
+---
+
+# Post-parity — editing, native polish & reliability
+
+With both parity tracks complete — Seal (Phases A–E above) and the
+[Pinchflat media-manager roadmap](ROADMAP-PINCHFLAT.md) (Phases F–K ✅) — this final track
+collects what's left, from two sources:
+
+1. A **feature study of [YTDLnis](https://github.com/deniscerri/ytdlnis)** (the other major
+   Android yt-dlp frontend), keeping only the features AeroFetch doesn't already have.
+2. A **Windows-native + daily-use UX gap analysis** of AeroFetch itself (things neither Seal
+   nor Pinchflat cover, but that a desktop app should do).
+
+Nothing here is built yet — every box is unchecked. Phases continue the existing lettering
+(A–E Seal, F–K Pinchflat) from **L onward**, and each item carries the yt-dlp flag and the
+AeroFetch file it touches so it can be driven straight from the existing `buildArgs` /
+`DownloadOptions` / queue plumbing rather than new infrastructure.
+
+Sources: [YTDLnis GitHub](https://github.com/deniscerri/ytdlnis) ·
+[YTDLnis docs](https://ytdlnis.org/) · [YTDLnis changelogs](https://ytdlnis.org/changelogs/) ·
+[F-Droid listing](https://f-droid.org/packages/com.deniscerri.ytdl/).
+
+### Already at parity with YTDLnis (do **not** rebuild)
+
+Format/quality/container picking · SponsorBlock (remove/mark + embed-as-chapters) · embed
+subtitles/metadata/chapters · cookies + login · custom command templates · backup/restore ·
+**Observe Sources** (= our Phase J watched sources + RSS) · incognito mode · history with
+filter + bulk re-download · filename templating · self-managing yt-dlp + ffmpeg binaries.
+AeroFetch is even with, or ahead of, YTDLnis on all of these.
+
+## Phase L — Media editing (YTDLnis headline features)
+
+YTDLnis's signature differentiator. The keyframe plumbing already exists in AeroFetch
+(`--force-keyframes-at-cuts` is emitted today for SponsorBlock-remove in
+`src/main/buildArgs.ts`), so this is cheaper than it looks.
+
+- [x] **Trim / cut downloads.** Keep only chosen time ranges (multiple allowed). →
+      `parseTrimSections` (`src/main/buildArgs.ts`) normalises raw user text into yt-dlp
+      `--download-sections "*START-END"` specs (+ `--force-keyframes-at-cuts`, deduped against
+      SponsorBlock-remove). Threaded as `StartDownloadOptions.trim` through
+      `store/downloads.ts`, surfaced as a collapsible **Trim** panel in `DownloadBar.tsx`
+      (single downloads only). *Implemented + unit-tested (`buildArgs.test.ts` — 7 new tests;
+      typecheck + test green). Live smoke test pending, plus two follow-ups: timestamp-range
+      only so far (chapter-based cuts via the probe `chapters[]` array, and a scrubber/preview
+      player, still TODO).*
+- [x] **Split by chapters into separate files.** → `--split-chapters` (already flagged as a
+      TODO in Phase A above). One toggle on `DownloadOptions` +
+      `src/renderer/src/components/DownloadOptionsForm.tsx`; pairs naturally with trim. yt-dlp
+      keeps the full file and writes per-chapter files via its default `chapter:` template.
+      *Implemented + unit-tested (`buildArgs.test.ts`, typecheck + test green); live smoke test
+      still pending.*
+- [ ] **Metadata editing before download.** Change title / author / artist pre-download
+      (YTDLnis: "modify metadata such as title and author"). → `--parse-metadata` /
+      `--replace-in-metadata`; fits the audio path. Good for building a clean music library
+      where the source title is messy. *Held: the exact set-a-literal recipe is fragile
+      (`--parse-metadata FROM:TO` splits on a colon that titles often contain;
+      `--replace-in-metadata FIELD REGEX REPLACE` has empty-field + regex-replacement edge
+      cases) — confirm against a live yt-dlp run before wiring it, rather than guessing the
+      flag.*
+
+## Phase M — Queue & daily-use UX ✅ COMPLETE
+
+Neither Seal nor Pinchflat covers these; they're what makes the queue pleasant to live in.
+Today `src/renderer/src/store/downloads.ts` has cancel + retry only.
+
+- [x] **Pause / resume individual downloads.** → yt-dlp resumes `.part` files via `--continue`
+      (already the default). *Done: `pauseDownload()` (`src/main/download.ts`) reuses the
+      `taskkill /T /F` tree-kill via a new `killTree` helper but flags the record `paused` so
+      the close/error handlers stay silent (no error event/log/notification); new
+      `download:pause` IPC + preload bridge. Renderer `pause`/`resume` (`store/downloads.ts`) +
+      a `paused` status: pause frees a concurrency slot, resume re-queues WITHOUT resetting
+      progress so the relaunch continues the partial. Pause/Resume buttons + a frozen progress
+      row in `QueueItem.tsx`; paused items survive "Clear finished". typecheck + test green;
+      live resume-continues-the-.part still wants a smoke test.*
+- [x] **Reorder / prioritize the queue.** *Done as a **"Download next"** action rather than
+      drag: since the queue renders newest-first while `pump()` promotes oldest-first, a
+      reposition primitive is clearer than drag. `prioritize(id)` (`store/downloads.ts`) moves a
+      queued item to the front of the promotion order; an up-arrow button on queued rows
+      (`QueueItem.tsx`).*
+- [x] **Aggregate progress + total ETA + combined speed.** A header strip on the Downloads
+      view summing bytes/speed across active items. Feeds straight into Phase O's taskbar
+      progress bar. *Done: pure `summarizeQueue` (`store/queueStats.ts`) → a strip in
+      `DownloadsView.tsx` (overall %, combined speed, longest-ETA "time left"); unit-tested
+      (`test/queueStats.test.ts`). A true remaining-bytes combined ETA is still out of reach —
+      we don't track per-item sizes — so "time left" is the longest single ETA.*
+- [x] **Drag-and-drop a link or `.url` file onto the window.** *Done: the download card
+      (`DownloadBar.tsx`) handles `onDragOver`/`onDrop` with a dashed-outline drag highlight,
+      accepting `text/uri-list`/`text/plain` (`firstUrl`) and dropped Windows `.url`
+      Internet-Shortcut files (`parseUrlFile`, read via `File.text()`); both http(s)-validated by
+      the existing `looksLikeUrl`. A dropped link fills the URL field.*
+- [x] **Retry all failed.** One action that re-enqueues every failed item. *Done:
+      `retryAll()` in `store/downloads.ts` re-queues all `error` items + a "Retry all failed (N)"
+      button in `DownloadsView.tsx`. (Re-queues live queue items rather than reading
+      `errorlog.json` — same effect for the on-screen failures.)*
+- [x] **Duplicate detection.** Warn ("you already have this") before enqueuing a URL already in
+      the active queue. *Done: pure `sameVideo()` (`store/queueStats.ts`, YouTube-id aware +
+      normalised-URL fallback) drives a "Already in your queue — Download anyway?" banner in
+      `DownloadBar.tsx`; unit-tested. Checks the live queue (which still holds recently-completed
+      items); cross-checking `history.json` for older downloads is a possible extension.*
+- [x] **Per-download scheduling + "save for later."** *Done: a `saved` status + optional
+      `scheduledFor` (`store/downloads.ts`); `pump()` ignores `saved` (the time gate), and a 15s
+      ticker promotes due scheduled items to `queued`. UI: a **Schedule** panel with a native
+      `datetime-local` input in `DownloadBar.tsx` (future time parks the new download as
+      scheduled), plus per-row **Save for later** / **Add to queue** actions in `QueueItem.tsx`;
+      saved items survive "Clear finished". Distinct from the Phase J `--sync` schedule (which is
+      for *sources*). **Limitation: the queue isn't persisted, so a schedule only fires while
+      AeroFetch is running** — noted in the UI hint and the code.*
+
+## Phase N — Power-user surface ✅ COMPLETE
+
+YTDLnis leans hard into this; AeroFetch had the building blocks (command preview, templates,
+per-item `options`) but not the surfaces. typecheck + test + `npm run build` clean.
+
+- [x] **Built-in terminal mode.** *Done: `src/main/terminal.ts` runs the bundled yt-dlp with
+      raw user args (binary fixed; gated on `customCommandEnabled`, enforced in main), streaming
+      stdout/stderr line-by-line over a new `terminal:output` channel (`terminal:run`/`cancel`
+      IPC + preload). New `TerminalView.tsx` (args box, Run/Stop/Clear, live log, Ctrl+Enter)
+      and a Terminal sidebar tab.*
+- [x] **Per-playlist-item editing.** *Done: the playlist panel in `DownloadBar.tsx` gained a
+      per-row video/audio toggle + **All video** / **All audio** batch buttons; `addPlaylist`
+      enqueues via `addMany` with each entry's own kind (quality falls back to that kind's
+      default). Per-item exact-format selection (needs probing each entry) left as a further
+      extension.*
+- [x] **Weighted format sorting ("format aspect importance").** *Done: a `formatSort` field on
+      `DownloadOptions` (raw yt-dlp `-S` string); when set it emits `-S <value>`, overriding the
+      codec tiebreaker (`buildArgs.ts`); an "advanced" input in `DownloadOptionsForm`. Unit-tested.*
+- [x] **URL-regex template auto-matching.** *Done: `CommandTemplate.urlPattern` (regex);
+      `selectExtraArgs` auto-applies a matching template ahead of the global default
+      (`matchesUrl`, bad patterns never match), URL threaded via `resolveExtraArgs`. urlPattern
+      field in `TemplateManager` + persisted in `templates.ts`. Unit-tested.*
+- [x] **Command palette + keyboard shortcuts.** *Done: a portal-free `CommandPalette.tsx`
+      (filter, ↑/↓, Enter, Esc) opened with Ctrl/Cmd+K from `App.tsx`; actions = navigate tabs,
+      new download (focuses the `aerofetch-url` input), toggle theme.*
+
+## Phase O — Windows-native integration & discoverability ✅ COMPLETE
+
+All in the main process. typecheck + test + `npm run build` clean.
+
+- [x] **Taskbar progress bar.** *Done: renderer pushes the `summarizeQueue` aggregate over a new
+      `taskbar:progress` channel (App-level store subscription, no re-render);
+      `mainWindow.setProgressBar` with `mode: 'normal' | 'error'` (red when any failed) and `-1`
+      to clear when idle.*
+- [x] **System tray + minimize-to-tray.** *Done: `src/main/tray.ts` builds a `Tray` (icon resolved
+      via `getAppIconPath()`; `build/icon.ico` added to electron-builder `extraResources` for
+      prod) with Show / Quit. A new `Settings.minimizeToTray` (Settings → Appearance) makes the
+      window's `close` hide to tray instead of quitting; `before-quit`/tray-Quit set an
+      `isQuitting` flag so real exits still work.*
+- [x] **Jump list.** *Done: `app.setUserTasks` adds an "Open AeroFetch" task (focuses the
+      single instance). **Thumbnail toolbar buttons deferred** — they need per-button `NativeImage`
+      assets this repo doesn't have tooling to generate here.*
+- [ ] **Taskbar overlay badge** (`win.setOverlayIcon`) showing active-download count / error state.
+      *Deferred: a numeric/status badge needs a drawn `NativeImage` (no canvas in main); the
+      taskbar progress bar's `error` mode already signals failures.*
+- [x] **Settings discoverability.** *Done: a search box atop `SettingsView` filters the ~11 cards
+      live by matching each card's text (DOM `display` toggle keyed off the root's children — no
+      per-card refactor), with a "no settings match" hint.*
+
+## Phase P — Reliability, longevity & trust ✅ (code shipped; cert + manual passes still required)
+
+The least glamorous, highest-leverage track. The buildable code is done (typecheck + test +
+build clean); the parts that inherently need a human or a paid cert are delivered as artifacts.
+
+- [x] **PO Token / YouTube reliability plumbing.** *Done: `Settings.youtubePlayerClient` +
+      `youtubePoToken` → one `--extractor-args "youtube:player_client=…;po_token=…"` group
+      (`accessArgs` in `buildArgs.ts`, unit-tested), with "advanced" fields in Settings → Network.
+      Lets a power user switch extraction client (`web_safari`/`tv`/`mweb`) or paste a token.*
+      **Deferred: automatic WebView token minting** (the YTDLnis headline) — the hard part;
+      this is the argv plumbing it would feed. Cookies remain the easier bot-check fix.
+- [x] **Verify the shipped-but-untested OS wiring.** *Can't be executed here (no real install).
+      Delivered as a release-gate checklist — [docs/SMOKE-TEST.md](docs/SMOKE-TEST.md) —
+      enumerating every untested path (cookies window, `aerofetch://` + Send-to, scheduled
+      `--sync` + RSS, aria2c, proxy, plus the new tray/taskbar/pause-resume/terminal) with exact
+      steps + expected results. **Still needs a human to run it.**
+- [x] **Code signing.** *Build is signing-ready: electron-builder picks the cert up from
+      `CSC_LINK` / `CSC_KEY_PASSWORD` with no yml change (unset = unsigned, as today). Documented
+      in [docs/SIGNING.md](docs/SIGNING.md) (OV vs EV, local + CI, HSM/EV hook, signature
+      verification). **Actual signing needs a purchased certificate.***
+- [ ] **i18n / language setting.** Still deferred — deliberately not faked. Shipping a language
+      picker that doesn't change anything would be misleading; doing it properly means wiring an
+      i18n library + extracting every string, with translations arriving incrementally. Tracked,
+      not started.
+
+---
+
+## Post-parity — what we reuse vs. build
+
+**Reuse unchanged:** `buildArgs`/`buildCommand` flag emission, `DownloadOptions` +
+`DownloadOptionsForm`, the renderer queue scheduler + concurrency cap + per-item `options`,
+the persisted cookies `BrowserWindow`, the probe's `chapters[]`/format data, `errorlog.ts`,
+`CommandTemplate`s, `extractIncomingUrl()`, and the self-managing binary updater.
+
+**Build new:** the trim/split UI + `--download-sections`/`--split-chapters` wiring (L), the
+pause/reorder/schedule queue states (M), the terminal view + per-item playlist editor (N), the
+main-process taskbar/tray/jumplist integration (O), and the PO-token provider (P).
+
+## Post-parity — suggested order
+
+**L is the high-value headline** — trim + split-chapters share one UI surface and the keyframe
+plumbing already exists, so they land cheaply and give AeroFetch YTDLnis's marquee capability.
+Then **P's PO-token + verify-wiring** as a reliability block (keeps YouTube working and de-risks
+shipped features). **M** and **O** are the daily-use polish and pair well (aggregate progress →
+taskbar bar). **N** is the power-user surface, each item independently shippable. Each phase is
+self-contained and rebuild-gated (`npm run typecheck` + `npm run test` + `npm run build`) the
+same way Phases A–K were.

docs/SIGNING.md

@@ -0,0 +1,77 @@
+# AeroFetch — Windows code signing
+
+Unsigned builds run, but Windows SmartScreen shows a blue **"Windows protected your PC"**
+prompt the first time each user runs the installer (they must click *More info → Run anyway*).
+This is the single biggest first-run friction when sharing AeroFetch. Code signing removes it
+(EV certificates remove it immediately; OV certificates build reputation over time/installs).
+
+**This step needs a certificate that can't live in the repo**, so it isn't wired on by default.
+The build is otherwise ready for it — electron-builder picks the cert up from environment
+variables with no `electron-builder.yml` changes required.
+
+## What you need
+
+- An **Authenticode code-signing certificate** for Windows:
+  - **OV (Organization Validation)** — cheaper; SmartScreen reputation accrues as more users
+    install, so early downloads still see the prompt.
+  - **EV (Extended Validation)** — pricier, usually on a hardware token / cloud HSM; clears
+    SmartScreen immediately. Token-based EV can't be fed as a plain `.pfx` (see "HSM/EV" below).
+- The cert as a password-protected `.pfx`/`.p12` (for OV), or an HSM/cloud-signing setup (EV).
+
+## Signing an OV `.pfx` locally
+
+electron-builder reads these env vars automatically:
+
+```bash
+# PowerShell
+$env:CSC_LINK = "C:\path\to\codesign.pfx"   # or a base64 string of the .pfx
+$env:CSC_KEY_PASSWORD = "<pfx password>"
+npm run build:win
+```
+
+```bash
+# bash / CI
+export CSC_LINK="$(base64 -w0 codesign.pfx)"   # base64 is convenient for CI secrets
+export CSC_KEY_PASSWORD="$PFX_PASSWORD"
+npm run build:win
+```
+
+electron-builder then signs `AeroFetch Setup <ver>.exe`, the portable `.exe`, and the app
+binary. No changes to `electron-builder.yml` are needed; if `CSC_LINK` is unset, the build
+proceeds **unsigned** (current behavior).
+
+## CI (GitHub Actions sketch)
+
+Store the cert + password as encrypted secrets and export them before the build:
+
+```yaml
+- name: Build (signed)
+  env:
+    CSC_LINK: ${{ secrets.WINDOWS_CSC_LINK }}          # base64 of the .pfx
+    CSC_KEY_PASSWORD: ${{ secrets.WINDOWS_CSC_KEY_PASSWORD }}
+  run: npm run build:win
+```
+
+## HSM / EV certificates
+
+EV certs (and many newer OV certs) ship on a hardware token or cloud HSM and can't be exported
+to a `.pfx`. Sign via a custom signing hook instead — set `win.sign` in `electron-builder.yml`
+to a script that invokes your provider's tool (Azure Trusted Signing, DigiCert KeyLocker,
+SSL.com eSigner, or `signtool` with the token). Each provider documents the exact `signtool`
+invocation; electron-builder calls your hook once per artifact with the file path.
+
+## Verifying a signature
+
+```powershell
+Get-AuthenticodeSignature ".\dist\AeroFetch Setup <ver>.exe" | Format-List
+# Status should be 'Valid'; SignerCertificate should be your cert.
+signtool verify /pa /v ".\dist\AeroFetch Setup <ver>.exe"
+```
+
+## Notes
+
+- The LGPL ffmpeg + yt-dlp binaries shipped in `resources/bin` are third-party; signing the
+  AeroFetch artifacts doesn't (and needn't) re-sign them.
+- Timestamp the signature (electron-builder does by default) so it stays valid after the cert
+  expires.
+- Signing does **not** replace the smoke test — see [SMOKE-TEST.md](SMOKE-TEST.md).

docs/SMOKE-TEST.md

@@ -0,0 +1,61 @@
+# AeroFetch — manual smoke-test checklist
+
+Some features can only be exercised against a **real install** (or a real yt-dlp run) —
+they're main-process / Electron / OS-integration code that the Vite browser preview and the
+unit suite can't reach. They're implemented and typecheck/test/build clean, but the roadmaps
+flag them as needing a hands-on pass. Run this checklist after building
+(`npm run build:win`) and installing the NSIS artifact (or launching the portable `.exe`).
+
+Mark each ✅/❌ and note anything surprising.
+
+## Downloads & post-processing (Phases A, L, M)
+
+- [ ] **Basic download** — paste a URL, Fetch, pick a format, Download → file lands in
+      Documents\Video (or your folder), progress + speed update, "Completed".
+- [ ] **Trim / cut** (Phase L) — set a section like `0:10-0:20`, download → output is ~10s and
+      starts/ends near the cut points (`--download-sections` + `--force-keyframes-at-cuts`).
+- [ ] **Split by chapters** (Phase L) — on a video with chapters, enable it → per-chapter files
+      appear alongside the full file.
+- [ ] **Pause / resume** (Phase M) — start a large download, Pause (process stops, `.part`
+      stays), Resume → it **continues** from where it stopped, not from 0% (yt-dlp `--continue`).
+- [ ] **Scheduling** (Phase M) — schedule a download a couple of minutes out → it sits "Saved /
+      Scheduled", then auto-starts at the time (only while the app is running).
+
+## Access & networking (Phase B, P)
+
+- [ ] **Cookies — sign-in window** — Settings → Cookies → "Sign-in window", log into a site,
+      close it → "cookies saved" with a timestamp; a members-only/age-gated video then downloads.
+- [ ] **Cookies — from browser** — pick an installed browser → a gated video downloads.
+- [ ] **Proxy** — set a working proxy → downloads route through it (verify via the proxy logs).
+- [ ] **aria2c** — drop `aria2c.exe` into `resources/bin`, enable it → multi-connection download
+      works; remove it → silently falls back to yt-dlp's downloader.
+- [ ] **YouTube client / PO token** (Phase P) — set `youtubePlayerClient` (e.g. `web_safari`) →
+      the run includes `--extractor-args youtube:player_client=web_safari` (check Terminal/Preview).
+
+## OS integration (Phase E, J, O)
+
+- [ ] **`aerofetch://` protocol** — from a browser, open `aerofetch://download?url=<encoded>` →
+      AeroFetch focuses and the URL appears in the "Link received" banner.
+- [ ] **Explorer "Send to AeroFetch"** — drag a tab to the desktop to make a `.url`, right-click →
+      Send to → AeroFetch → the link is received.
+- [ ] **Scheduled sync** (Phase J) — Settings → enable the daily sync → a Windows Task Scheduler
+      task exists; run it (or `AeroFetch.exe --sync`) → watched sources index and new items enqueue.
+- [ ] **RSS fast-check** (Phase J) — "Check for new" on a watched channel → newly-posted videos
+      show as new without a full re-index.
+- [ ] **System tray** (Phase O) — enable "Keep running in the tray", close the window → it hides
+      to the tray; tray click reopens; tray → Quit actually exits.
+- [ ] **Taskbar progress** (Phase O) — during downloads the taskbar icon shows a progress bar;
+      it turns red if one fails and clears when the queue goes idle.
+- [ ] **Jump list** (Phase O) — right-click the taskbar icon → "Open AeroFetch" focuses the app.
+
+## Terminal (Phase N)
+
+- [ ] Enable "Run custom commands", open Terminal, run `--version` → the version prints; run
+      `-F <url>` → the format table streams in; Stop cancels a long run.
+
+---
+
+If anything here fails, capture the Settings → Diagnostics "Copy full report" output and the
+exact steps. These items have no automated coverage, so this checklist is the release gate for
+them. See also [SIGNING.md](SIGNING.md) for the code-signing step that removes the SmartScreen
+prompt for end users.

electron-builder.yml

@@ -30,6 +30,10 @@ extraResources:
     to: bin
     filter:
       - '**/*'
+  # The app icon, copied so the runtime (system tray) can load it at
+  # <resources>/icon.ico — build/ itself isn't bundled into the app.
+  - from: build/icon.ico
+    to: icon.ico
 
 win:
   # Two artifacts:

package-lock.json

@@ -1,16 +1,17 @@
 {
   "name": "aerofetch",
-  "version": "0.1.0",
+  "version": "0.4.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "aerofetch",
-      "version": "0.1.0",
+      "version": "0.4.1",
       "dependencies": {
         "@electron-toolkit/utils": "^4.0.0",
         "@fluentui/react-components": "^9.74.1",
         "@fluentui/react-icons": "^2.0.330",
+        "@tanstack/react-virtual": "^3.14.3",
         "electron-store": "^11.0.2",
         "react": "^19.2.7",
         "react-dom": "^19.2.7",
@@ -3373,6 +3374,33 @@
         "node": ">=10"
       }
     },
+    "node_modules/@tanstack/react-virtual": {
+      "version": "3.14.3",
+      "resolved": "https://registry.npmjs.org/@tanstack/react-virtual/-/react-virtual-3.14.3.tgz",
+      "integrity": "sha512-k/cnHPVaOfn46hSbiY6n4Dzf4QjCGWSF40zR5QIIYUqPAjpA6TN7InfYmcMiDVQGP2iUn9xsRbAl8u1v3UmeVQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@tanstack/virtual-core": "3.17.1"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      },
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0",
+        "react-dom": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
+    "node_modules/@tanstack/virtual-core": {
+      "version": "3.17.1",
+      "resolved": "https://registry.npmjs.org/@tanstack/virtual-core/-/virtual-core-3.17.1.tgz",
+      "integrity": "sha512-VZyW2Uiml5tmBZwPGrSD3Sz73OxzljQMCmzYHsUTPEuTsERf5xwa+uWb01xEzkz3ZSYTjj8NEb/mKHvgKxyZdA==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      }
+    },
     "node_modules/@types/babel__core": {
       "version": "7.20.5",
       "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.20.5.tgz",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "aerofetch",
-  "version": "0.4.1",
+  "version": "0.5.0",
   "description": "A yt-dlp frontend for Windows",
   "main": "./out/main/index.js",
   "author": "AeroFetch",
@@ -25,6 +25,7 @@
     "@electron-toolkit/utils": "^4.0.0",
     "@fluentui/react-components": "^9.74.1",
     "@fluentui/react-icons": "^2.0.330",
+    "@tanstack/react-virtual": "^3.14.3",
     "electron-store": "^11.0.2",
     "react": "^19.2.7",
     "react-dom": "^19.2.7",

src/main/binaries.ts

@@ -13,10 +13,42 @@ export function getBinDir(): string {
   return is.dev ? join(app.getAppPath(), 'resources', 'bin') : join(process.resourcesPath, 'bin')
 }
 
-export function getYtdlpPath(): string {
+/**
+ * The app icon (.ico), for the system tray. In dev it's the repo's build/icon.ico;
+ * in a packaged build, electron-builder's extraResources copies it to
+ * <resources>/icon.ico (see electron-builder.yml).
+ */
+export function getAppIconPath(): string {
+  return is.dev
+    ? join(app.getAppPath(), 'build', 'icon.ico')
+    : join(process.resourcesPath, 'icon.ico')
+}
+
+/**
+ * AeroFetch keeps its OWN writable copy of yt-dlp.exe under userData, separate
+ * from the read-only bundled seed in resources/bin. The managed copy is what
+ * actually gets spawned and self-updated (`--update-to`), so an app reinstall or
+ * portable re-extraction — which only ever replace the bundled seed — can never
+ * roll a freshly-updated yt-dlp back to a stale version. See ensureManagedYtdlp
+ * in ytdlp.ts, which seeds this from getBundledYtdlpPath() on first run.
+ *
+ * ffmpeg/ffprobe/aria2c stay in getBinDir(): they're not self-updating and
+ * yt-dlp finds them via `--ffmpeg-location <binDir>`.
+ */
+export function getManagedBinDir(): string {
+  return join(app.getPath('userData'), 'bin')
+}
+
+/** The bundled, read-only yt-dlp.exe seeded into the managed copy when missing. */
+export function getBundledYtdlpPath(): string {
   return join(getBinDir(), 'yt-dlp.exe')
 }
 
+/** The managed (spawned + auto-updated) yt-dlp.exe under userData. */
+export function getYtdlpPath(): string {
+  return join(getManagedBinDir(), 'yt-dlp.exe')
+}
+
 export function getFfmpegPath(): string {
   return join(getBinDir(), 'ffmpeg.exe')
 }

src/main/buildArgs.ts

@@ -100,6 +100,10 @@ export interface AccessOptions {
   restrictFilenames: boolean
   /** absolute path to a --download-archive file; omit to disable archive tracking */
   downloadArchivePath?: string
+  /** YouTube extraction client override (e.g. 'web_safari'); empty/omitted = default */
+  youtubePlayerClient?: string
+  /** manually-supplied YouTube Proof-of-Origin token; empty/omitted = none */
+  youtubePoToken?: string
 }
 
 // Tuned for typical CDN-served video: 16 connections split across 16 segments,
@@ -143,6 +147,7 @@ export function parseExtraArgs(raw: string): string[] {
  *
  *  - customCommandEnabled off               → [] (always)
  *  - perDownloadExtraArgs defined (even '')  → those args
+ *  - else a template whose urlPattern matches → that template's args (most specific)
  *  - else a matching defaultTemplateId       → that template's args
  *  - else                                    → []
  */
@@ -150,10 +155,20 @@ export function selectExtraArgs(params: {
   customCommandEnabled: boolean
   perDownloadExtraArgs: string | undefined
   defaultTemplateId: string | null
-  templates: Pick<CommandTemplate, 'id' | 'args'>[]
+  templates: Pick<CommandTemplate, 'id' | 'args' | 'urlPattern'>[]
+  /** the download URL, for urlPattern auto-matching */
+  url?: string
 }): string[] {
   if (!params.customCommandEnabled) return []
   if (params.perDownloadExtraArgs !== undefined) return parseExtraArgs(params.perDownloadExtraArgs)
+  // A template whose urlPattern matches this URL auto-applies, ahead of the global
+  // default — it's the more specific choice.
+  if (params.url) {
+    const matched = params.templates.find(
+      (t) => t.urlPattern && matchesUrl(t.urlPattern, params.url!)
+    )
+    if (matched) return parseExtraArgs(matched.args)
+  }
   if (params.defaultTemplateId) {
     const tpl = params.templates.find((t) => t.id === params.defaultTemplateId)
     if (tpl) return parseExtraArgs(tpl.args)
@@ -161,6 +176,39 @@ export function selectExtraArgs(params: {
   return []
 }
 
+/** Case-insensitive regex test of a template's urlPattern; a bad pattern never matches. */
+export function matchesUrl(pattern: string, url: string): boolean {
+  try {
+    return new RegExp(pattern, 'i').test(url)
+  } catch {
+    return false
+  }
+}
+
+/**
+ * Parse a raw trim string (one or more time ranges, comma- or newline-separated)
+ * into yt-dlp `--download-sections` specs. Each range is normalised to the
+ * `*START-END` time-range form yt-dlp expects (the leading `*` distinguishes a
+ * timestamp range from a chapter-title regex). Tokens that don't look like a
+ * numeric time range are dropped, so malformed input can't reach yt-dlp's argv.
+ *
+ * Accepts H:MM:SS / M:SS / SS with optional fractional seconds, e.g. '1:30-2:00',
+ * '90-120', '0:00:10.5-0:00:20'. A token may already carry the leading `*`.
+ */
+export function parseTrimSections(raw: string | undefined): string[] {
+  if (!raw) return []
+  const TIME = String.raw`\d+(?::\d{1,2})*(?:\.\d+)?`
+  const RANGE = new RegExp(`^${TIME}-${TIME}$`)
+  const out: string[] = []
+  for (const piece of raw.split(/[,\n]/)) {
+    let t = piece.trim()
+    if (!t) continue
+    if (t.startsWith('*')) t = t.slice(1).trim()
+    if (RANGE.test(t)) out.push(`*${t}`)
+  }
+  return out
+}
+
 // Wrap a single argv token for human-readable display only (Phase C command
 // preview) — never used to build the real argv that gets spawned.
 function quoteForDisplay(arg: string): string {
@@ -234,6 +282,12 @@ function accessArgs(a: AccessOptions): string[] {
   else if (a.cookiesFile) args.push('--cookies', a.cookiesFile)
   if (a.restrictFilenames) args.push('--restrict-filenames')
   if (a.downloadArchivePath) args.push('--download-archive', a.downloadArchivePath)
+  // YouTube reliability: combine the player-client + PO-token overrides into one
+  // `youtube:` extractor-args group (semicolon-separated, as yt-dlp expects).
+  const yt: string[] = []
+  if (a.youtubePlayerClient?.trim()) yt.push(`player_client=${a.youtubePlayerClient.trim()}`)
+  if (a.youtubePoToken?.trim()) yt.push(`po_token=${a.youtubePoToken.trim()}`)
+  if (yt.length > 0) args.push('--extractor-args', `youtube:${yt.join(';')}`)
   return args
 }
 
@@ -250,17 +304,30 @@ function postProcessArgs(opts: StartDownloadOptions, o: DownloadOptions): string
   }
 
   // SponsorBlock.
+  let forcedKeyframes = false
   if (o.sponsorBlock && o.sponsorBlockCategories.length > 0) {
     const cats = o.sponsorBlockCategories.join(',')
     if (o.sponsorBlockMode === 'remove') {
       // Force keyframes at the cut points so segment boundaries are frame-accurate.
       args.push('--sponsorblock-remove', cats, '--force-keyframes-at-cuts')
+      forcedKeyframes = true
     } else {
       args.push('--sponsorblock-mark', cats)
     }
   }
 
+  // Trim — download only the given time ranges (works for video + audio). Force
+  // keyframes at the cut points for frame-accurate boundaries, unless
+  // SponsorBlock-remove already requested it (the flag is idempotent, but we
+  // avoid emitting it twice).
+  const sections = parseTrimSections(opts.trim)
+  for (const sec of sections) args.push('--download-sections', sec)
+  if (sections.length > 0 && !forcedKeyframes) args.push('--force-keyframes-at-cuts')
+
   if (o.embedChapters) args.push('--embed-chapters')
+  // Split into one file per chapter. yt-dlp also keeps the full file; the
+  // per-chapter files use yt-dlp's default `chapter:` output template.
+  if (o.splitChapters) args.push('--split-chapters')
   if (o.embedMetadata) args.push('--embed-metadata')
 
   // Media-server sidecar files (Phase K) — written next to the output file so
@@ -310,9 +377,13 @@ export function buildArgs(
     }
   } else {
     args.push('-f', videoSelector(opts), '--merge-output-format', o.videoContainer)
-    // Codec preference is a sort tiebreaker AFTER resolution/fps, so it nudges the
+    // A raw format-sort string (advanced) wins outright; otherwise the codec
-    // pick toward the chosen codec without overriding the requested quality.
+    // preference is a sort tiebreaker AFTER resolution/fps, nudging the pick toward
-    if (o.preferredVideoCodec !== 'any') {
+    // the chosen codec without overriding the requested quality.
+    const sort = o.formatSort.trim()
+    if (sort) {
+      args.push('-S', sort)
+    } else if (o.preferredVideoCodec !== 'any') {
       const token = o.preferredVideoCodec === 'av1' ? 'av01' : o.preferredVideoCodec
       args.push('-S', `res,fps,vcodec:${token}`)
     }

src/main/download.ts

@@ -11,6 +11,7 @@ import {
   getSystem32Path
 } from './binaries'
 import { getSettings, getDownloadArchivePath, getDefaultMediaDir } from './settings'
+import { ensureManagedYtdlp } from './ytdlp'
 import { getCookiesFilePath } from './cookies'
 import { listTemplates } from './templates'
 import { assertHttpUrl } from './url'
@@ -37,6 +38,7 @@ import {
 interface ActiveDownload {
   child: ChildProcess
   canceled: boolean
+  paused: boolean
 }
 
 const active = new Map<string, ActiveDownload>()
@@ -168,7 +170,8 @@ function resolveExtraArgs(opts: StartDownloadOptions, settings: Settings): strin
     customCommandEnabled: settings.customCommandEnabled,
     perDownloadExtraArgs: opts.extraArgs,
     defaultTemplateId: settings.defaultTemplateId,
-    templates: listTemplates()
+    templates: listTemplates(),
+    url: opts.url
   })
 }
 
@@ -211,7 +214,9 @@ export function buildCommand(opts: StartDownloadOptions): string[] {
     cookiesFromBrowser: settings.cookieSource === 'browser' ? settings.cookiesBrowser : undefined,
     cookiesFile,
     restrictFilenames: settings.restrictFilenames,
-    downloadArchivePath: settings.downloadArchive ? getDownloadArchivePath() : undefined
+    downloadArchivePath: settings.downloadArchive ? getDownloadArchivePath() : undefined,
+    youtubePlayerClient: settings.youtubePlayerClient,
+    youtubePoToken: settings.youtubePoToken
   }
   const extraArgs = resolveExtraArgs(opts, settings)
   return buildArgs(opts, outputTemplate, options, getBinDir(), access, extraArgs)
@@ -240,11 +245,14 @@ export function startDownload(
   wc: WebContents,
   opts: StartDownloadOptions
 ): StartDownloadResult {
+  // Self-heal the managed copy from the bundled seed before spawning, so a
+  // never-seeded or deleted yt-dlp.exe doesn't fail an otherwise-fine download.
+  ensureManagedYtdlp()
   const ytdlp = getYtdlpPath()
   if (!existsSync(ytdlp)) {
     return {
       ok: false,
-      error: `yt-dlp.exe not found at ${ytdlp}\nDrop it into resources/bin/ (see the README there).`
+      error: `yt-dlp.exe is missing and couldn't be restored from the bundle.\nReinstall AeroFetch, or drop yt-dlp.exe into resources/bin/ (see the README there).`
     }
   }
   // ffmpeg is used by nearly every download (merge, audio extract, thumbnail/
@@ -291,7 +299,7 @@ export function startDownload(
     return { ok: false, error: (e as Error).message }
   }
 
-  const rec: ActiveDownload = { child, canceled: false }
+  const rec: ActiveDownload = { child, canceled: false, paused: false }
   active.set(opts.id, rec)
 
   // Title/channel/duration are kept locally so the completion notification and
@@ -340,7 +348,8 @@ export function startDownload(
     if (settled) return
     settled = true
     active.delete(opts.id)
-    if (!rec.canceled) {
+    // A paused download was killed on purpose — stay silent, like a cancel.
+    if (!rec.canceled && !rec.paused) {
       send(wc, { type: 'error', id: opts.id, error: err.message })
       logFailure(opts, resolvedTitle, err.message)
       notify(wc, resolvedTitle ?? 'Download failed', err.message)
@@ -351,7 +360,9 @@ export function startDownload(
     if (settled) return
     settled = true
     active.delete(opts.id)
-    if (rec.canceled) return // renderer already showed 'canceled' optimistically
+    // Canceled: renderer already showed 'canceled'. Paused: renderer showed
+    // 'paused' and keeps the .part for a later resume. Either way, no event.
+    if (rec.canceled || rec.paused) return
     if (code === 0) {
       send(wc, { type: 'done', id: opts.id, filePath })
       notify(wc, resolvedTitle ?? 'Download complete', 'Finished downloading.')
@@ -366,15 +377,12 @@ export function startDownload(
   return { ok: true }
 }
 
-export function cancelDownload(id: string): void {
+// Kill the whole process tree (/T) so the spawned ffmpeg child dies too. Resolve
-  const rec = active.get(id)
+// taskkill from System32 by absolute path, never the bare name, so a planted
-  if (!rec) return
+// taskkill.exe on PATH / in the CWD can't run in its place. (audit F3)
-  rec.canceled = true
+function killTree(rec: ActiveDownload): void {
   const pid = rec.child.pid
   if (pid != null) {
-    // Kill the whole tree (/T) so the spawned ffmpeg child dies too. Resolve
-    // taskkill from System32 by absolute path, never the bare name, so a planted
-    // taskkill.exe on PATH / in the CWD can't run in its place. (audit F3)
     execFile(
       getSystem32Path('taskkill.exe'),
       ['/pid', String(pid), '/T', '/F'],
@@ -385,3 +393,24 @@ export function cancelDownload(id: string): void {
     rec.child.kill()
   }
 }
+
+export function cancelDownload(id: string): void {
+  const rec = active.get(id)
+  if (!rec) return
+  rec.canceled = true
+  killTree(rec)
+}
+
+/**
+ * Pause a running download: kill the process tree but flag it `paused` (not
+ * `canceled`) so the close handler stays silent — no error event, no error log,
+ * no notification. yt-dlp leaves the partial `.part` file in place, so resuming
+ * is just a fresh startDownload with the same options: yt-dlp's default
+ * `--continue` picks the partial file back up.
+ */
+export function pauseDownload(id: string): void {
+  const rec = active.get(id)
+  if (!rec) return
+  rec.paused = true
+  killTree(rec)
+}

src/main/ffmpeg.ts

@@ -0,0 +1,36 @@
+import { execFile } from 'child_process'
+import { existsSync } from 'fs'
+import { getFfmpegPath, getFfprobePath } from './binaries'
+import type { FfmpegVersionResult } from '@shared/ipc'
+
+/**
+ * Read the version token from an ffmpeg/ffprobe binary. Both print a first line
+ * of the form "<tool> version <VERSION> Copyright ..." (e.g.
+ * "ffmpeg version 6.1.1-full_build-www.gyan.dev Copyright ..."), so we return the
+ * token after "version". Resolves null if the binary is absent, errors, times
+ * out, or the line doesn't parse — Settings then shows "not found" instead of
+ * failing. Unlike yt-dlp these are never self-updated, so there's no update path.
+ */
+function readToolVersion(path: string): Promise<string | null> {
+  if (!existsSync(path)) return Promise.resolve(null)
+  return new Promise((resolve) => {
+    execFile(path, ['-version'], { windowsHide: true, timeout: 15_000 }, (err, stdout) => {
+      if (err) {
+        resolve(null)
+        return
+      }
+      const firstLine = stdout.split('\n', 1)[0] ?? ''
+      const m = firstLine.match(/version\s+(\S+)/i)
+      resolve(m ? m[1] : null)
+    })
+  })
+}
+
+/** Versions of the bundled ffmpeg + ffprobe, read in parallel for the Settings panel. */
+export async function getFfmpegVersions(): Promise<FfmpegVersionResult> {
+  const [ffmpeg, ffprobe] = await Promise.all([
+    readToolVersion(getFfmpegPath()),
+    readToolVersion(getFfprobePath())
+  ])
+  return { ffmpeg, ffprobe }
+}

src/main/index.ts

@@ -8,12 +8,15 @@ import {
   type HistoryEntry,
   type CommandTemplate,
   type YtdlpUpdateChannel,
-  type SystemThemeInfo
+  type SystemThemeInfo,
+  type TaskbarProgress
 } from '@shared/ipc'
-import { getYtdlpVersion, updateYtdlp } from './ytdlp'
+import { getYtdlpVersion, updateYtdlp, runStartupYtdlpAutoUpdate } from './ytdlp'
+import { getFfmpegVersions } from './ffmpeg'
 import { checkForAppUpdate, downloadAppUpdate, runAppUpdate } from './updater'
 import { probeMedia } from './probe'
-import { startDownload, cancelDownload, previewCommand } from './download'
+import { startDownload, cancelDownload, pauseDownload, previewCommand } from './download'
+import { runTerminal, cancelTerminal } from './terminal'
 import { getSettings, setSettings, ensureMediaDirs } from './settings'
 import { listHistory, addHistory, removeHistory, removeManyHistory, clearHistory } from './history'
 import { listTemplates, saveTemplate, removeTemplate } from './templates'
@@ -34,6 +37,7 @@ import {
 import { indexSource } from './indexer'
 import { syncWatchedSources } from './sync'
 import { getScheduledSync, setScheduledSync, isSyncLaunch } from './schedule'
+import { createTray, markQuitting, isQuitting } from './tray'
 
 // Only one instance ever runs. A second launch — e.g. the OS invoking us again
 // for an aerofetch:// link or a "Send to AeroFetch" file — hands its argv to
@@ -133,6 +137,15 @@ function createWindow(): void {
     else win.show()
   })
 
+  // Minimize-to-tray: when enabled, closing the window hides it to the tray
+  // instead of quitting. A real quit (tray menu / before-quit) sets isQuitting().
+  win.on('close', (e) => {
+    if (getSettings().minimizeToTray && !isQuitting()) {
+      e.preventDefault()
+      win.hide()
+    }
+  })
+
   win.on('closed', () => {
     if (mainWindow === win) mainWindow = null
   })
@@ -190,6 +203,8 @@ function registerIpcHandlers(): void {
 
   ipcMain.handle(IpcChannels.ytdlpVersion, () => getYtdlpVersion())
 
+  ipcMain.handle(IpcChannels.ffmpegVersion, () => getFfmpegVersions())
+
   ipcMain.handle(IpcChannels.probe, (_e, url: string) => probeMedia(url))
 
   ipcMain.handle(IpcChannels.downloadStart, (e, opts: StartDownloadOptions) => {
@@ -208,6 +223,11 @@ function registerIpcHandlers(): void {
     return result
   })
   ipcMain.handle(IpcChannels.downloadCancel, (_e, id: string) => cancelDownload(id))
+  ipcMain.handle(IpcChannels.downloadPause, (_e, id: string) => pauseDownload(id))
+  ipcMain.handle(IpcChannels.terminalRun, (e, id: string, args: string) =>
+    runTerminal(e.sender, id, args)
+  )
+  ipcMain.handle(IpcChannels.terminalCancel, (_e, id: string) => cancelTerminal(id))
 
   ipcMain.handle(IpcChannels.defaultFolder, () => app.getPath('downloads'))
 
@@ -312,6 +332,13 @@ function registerIpcHandlers(): void {
   )
   ipcMain.handle(IpcChannels.scheduledSyncGet, () => getScheduledSync())
   ipcMain.handle(IpcChannels.scheduledSyncSet, (_e, enabled: boolean) => setScheduledSync(enabled))
+
+  // Reflect overall queue progress on the Windows taskbar (fire-and-forget).
+  ipcMain.on(IpcChannels.taskbarProgress, (_e, p: TaskbarProgress) => {
+    if (!mainWindow || mainWindow.isDestroyed()) return
+    if (p.mode === 'none') mainWindow.setProgressBar(-1)
+    else mainWindow.setProgressBar(Math.max(0, Math.min(1, p.fraction)), { mode: p.mode })
+  })
 }
 
 // Push OS theme/contrast changes to every window, and keep the native
@@ -352,12 +379,40 @@ if (isPrimaryInstance) {
     registerSystemThemeBridge()
     registerSendToShortcut()
     createWindow()
+    createTray(() => mainWindow)
+
+    // Taskbar right-click jump list: a quick "Open AeroFetch" task. Launching the
+    // exe again is caught by the single-instance lock, which focuses this window.
+    app.setUserTasks([
+      {
+        program: process.execPath,
+        arguments: '',
+        title: 'Open AeroFetch',
+        description: 'Open the AeroFetch window',
+        iconPath: process.execPath,
+        iconIndex: 0
+      }
+    ])
+
+    // Keep yt-dlp current on its own: seed the managed copy, then (throttled to
+    // once a day) self-update it to the chosen channel so a stale binary can't
+    // silently cause YouTube 403s. Best-effort and off the critical path — it
+    // never blocks startup, and status is pushed to the window if it's listening.
+    runStartupYtdlpAutoUpdate((status) => {
+      if (mainWindow && !mainWindow.isDestroyed()) {
+        mainWindow.webContents.send(IpcChannels.ytdlpAutoUpdateStatus, status)
+      }
+    }).catch(() => {})
 
     app.on('activate', () => {
       if (BrowserWindow.getAllWindows().length === 0) createWindow()
     })
   })
 
+  // Any real quit path (tray "Quit", OS shutdown, the updater's app.quit) must set
+  // the quitting flag so the window's close handler exits instead of hiding to tray.
+  app.on('before-quit', () => markQuitting())
+
   app.on('window-all-closed', () => {
     if (process.platform !== 'darwin') {
       app.quit()

src/main/settings.ts

@@ -11,6 +11,7 @@ import {
   COOKIE_BROWSERS,
   ACCENT_COLORS,
   DEFAULT_DOWNLOAD_OPTIONS,
+  isYtdlpUpdateChannel,
   type Settings,
   type DownloadOptions,
   type SponsorBlockCategory
@@ -35,13 +36,21 @@ const DEFAULTS: Settings = {
   useAria2c: false,
   cookieSource: 'none',
   cookiesBrowser: 'chrome',
+  youtubePlayerClient: '',
+  youtubePoToken: '',
   restrictFilenames: false,
   downloadArchive: false,
+  // yt-dlp is self-managed: a writable copy under userData, auto-updated on the
+  // nightly channel (fastest to follow YouTube changes that cause 403s).
+  autoUpdateYtdlp: true,
+  ytdlpChannel: 'nightly',
+  ytdlpLastUpdateCheck: 0,
   customCommandEnabled: false,
   defaultTemplateId: null,
   notifyOnComplete: true,
   autoDownloadNew: true,
-  hasCompletedOnboarding: false
+  hasCompletedOnboarding: false,
+  minimizeToTray: false
 }
 
 /** Fixed path for the --download-archive file; not user-configurable. */
@@ -95,6 +104,7 @@ function sanitizeOptions(input: unknown): DownloadOptions {
     preferredVideoCodec: VIDEO_CODECS.includes(o.preferredVideoCodec as never)
       ? o.preferredVideoCodec!
       : d.preferredVideoCodec,
+    formatSort: typeof o.formatSort === 'string' ? o.formatSort.trim() : d.formatSort,
     embedSubtitles: bool(o.embedSubtitles, d.embedSubtitles),
     subtitleLanguages:
       typeof o.subtitleLanguages === 'string' && o.subtitleLanguages.trim()
@@ -105,6 +115,7 @@ function sanitizeOptions(input: unknown): DownloadOptions {
     sponsorBlockMode: o.sponsorBlockMode === 'mark' ? 'mark' : 'remove',
     sponsorBlockCategories: cats,
     embedChapters: bool(o.embedChapters, d.embedChapters),
+    splitChapters: bool(o.splitChapters, d.splitChapters),
     embedMetadata: bool(o.embedMetadata, d.embedMetadata),
     embedThumbnail: bool(o.embedThumbnail, d.embedThumbnail),
     cropThumbnail: bool(o.cropThumbnail, d.cropThumbnail),
@@ -193,12 +204,25 @@ export function setSettings(partial: Partial<Settings>): Settings {
       case 'useAria2c':
       case 'restrictFilenames':
       case 'downloadArchive':
+      case 'autoUpdateYtdlp':
       case 'customCommandEnabled':
       case 'notifyOnComplete':
       case 'autoDownloadNew':
       case 'hasCompletedOnboarding':
+      case 'minimizeToTray':
         if (typeof value === 'boolean') s.set(key, value)
         break
+      case 'ytdlpChannel':
+        // Same allowlist that guards the `--update-to` flag (audit F1).
+        if (isYtdlpUpdateChannel(value)) s.set('ytdlpChannel', value)
+        break
+      case 'ytdlpLastUpdateCheck': {
+        // Set by the main-process auto-updater; validated here since setSettings
+        // is the only writer. A bogus value at worst skips/forces one check.
+        const n = Number(value)
+        if (Number.isFinite(n) && n >= 0) s.set('ytdlpLastUpdateCheck', n)
+        break
+      }
       case 'defaultTemplateId':
         if (value === null || typeof value === 'string') s.set('defaultTemplateId', value)
         break
@@ -234,6 +258,8 @@ export function setSettings(partial: Partial<Settings>): Settings {
       // and exported by exportBackup as-is — documented, not masked.
       case 'proxy':
       case 'rateLimit':
+      case 'youtubePlayerClient':
+      case 'youtubePoToken':
         if (typeof value === 'string') s.set(key, value)
         break
     }

src/main/templates.ts

@@ -36,10 +36,13 @@ function save(templates: CommandTemplate[]): void {
 }
 
 function sanitize(t: CommandTemplate): CommandTemplate {
+  const urlPattern = typeof t.urlPattern === 'string' ? t.urlPattern.trim() : ''
   return {
     id: String(t.id),
     name: (t.name ?? '').trim() || 'Untitled command',
-    args: (t.args ?? '').trim()
+    args: (t.args ?? '').trim(),
+    // Only persist a urlPattern when one was provided, keeping older files clean.
+    ...(urlPattern ? { urlPattern } : {})
   }
 }
 

src/main/terminal.ts

@@ -0,0 +1,99 @@
+/**
+ * Built-in yt-dlp terminal (Phase N): runs the bundled yt-dlp with raw, user-typed
+ * arguments and streams stdout/stderr back to the renderer line-by-line.
+ *
+ * SECURITY: the executable is fixed to the managed yt-dlp (never an arbitrary exe),
+ * and the whole feature is gated on Settings.customCommandEnabled — the same consent
+ * flag that guards per-download extra args, because yt-dlp args can run arbitrary
+ * code (`--exec`). The gate is enforced here in main, not just in the renderer UI.
+ */
+import { spawn, execFile, type ChildProcess } from 'child_process'
+import { existsSync } from 'fs'
+import { type WebContents } from 'electron'
+import { getYtdlpPath, getBinDir, getSystem32Path } from './binaries'
+import { getSettings } from './settings'
+import { ensureManagedYtdlp } from './ytdlp'
+import { parseExtraArgs } from './buildArgs'
+import { IpcChannels, type TerminalEvent, type TerminalRunResult } from '@shared/ipc'
+
+const active = new Map<string, ChildProcess>()
+
+function send(wc: WebContents, ev: TerminalEvent): void {
+  if (!wc.isDestroyed()) wc.send(IpcChannels.terminalOutput, ev)
+}
+
+export function runTerminal(wc: WebContents, id: string, argsRaw: string): TerminalRunResult {
+  if (!getSettings().customCommandEnabled) {
+    return {
+      ok: false,
+      error: 'Enable "Run custom commands" in Settings → Custom commands to use the terminal.'
+    }
+  }
+  ensureManagedYtdlp()
+  const ytdlp = getYtdlpPath()
+  if (!existsSync(ytdlp)) {
+    return { ok: false, error: 'yt-dlp.exe is missing and could not be restored.' }
+  }
+  if (active.has(id)) return { ok: false, error: 'A command is already running.' }
+
+  // Always pin ffmpeg so post-processing works; the rest is whatever the user typed.
+  const args = ['--ffmpeg-location', getBinDir(), ...parseExtraArgs(argsRaw)]
+  let child: ChildProcess
+  try {
+    child = spawn(ytdlp, args, { windowsHide: true })
+  } catch (e) {
+    return { ok: false, error: (e as Error).message }
+  }
+  active.set(id, child)
+
+  // Buffer each stream and emit on newline boundaries (flush the remainder on close).
+  const buffers: Record<'stdout' | 'stderr', string> = { stdout: '', stderr: '' }
+  function feed(stream: 'stdout' | 'stderr', chunk: string): void {
+    buffers[stream] += chunk
+    let nl: number
+    while ((nl = buffers[stream].indexOf('\n')) >= 0) {
+      const line = buffers[stream].slice(0, nl).replace(/\r$/, '')
+      buffers[stream] = buffers[stream].slice(nl + 1)
+      send(wc, { type: 'output', id, line, stream })
+    }
+  }
+  child.stdout?.on('data', (c: Buffer) => feed('stdout', c.toString()))
+  child.stderr?.on('data', (c: Buffer) => feed('stderr', c.toString()))
+
+  let settled = false
+  child.on('error', (err) => {
+    if (settled) return
+    settled = true
+    active.delete(id)
+    send(wc, { type: 'error', id, error: err.message })
+  })
+  child.on('close', (code) => {
+    if (settled) return
+    settled = true
+    active.delete(id)
+    // Flush any trailing partial lines that never hit a newline.
+    for (const stream of ['stdout', 'stderr'] as const) {
+      if (buffers[stream]) send(wc, { type: 'output', id, line: buffers[stream], stream })
+    }
+    send(wc, { type: 'done', id, code })
+  })
+
+  return { ok: true }
+}
+
+export function cancelTerminal(id: string): void {
+  const child = active.get(id)
+  if (!child) return
+  const pid = child.pid
+  if (pid != null) {
+    // Tree-kill via System32 taskkill by absolute path (same hardening as download.ts).
+    execFile(
+      getSystem32Path('taskkill.exe'),
+      ['/pid', String(pid), '/T', '/F'],
+      { windowsHide: true },
+      () => {}
+    )
+  } else {
+    child.kill()
+  }
+}

src/main/tray.ts

@@ -0,0 +1,55 @@
+/**
+ * System tray + minimize-to-tray (Phase O). When Settings.minimizeToTray is on,
+ * closing the window hides it to the tray instead of quitting; the tray's "Quit"
+ * really exits. The tray gives the app a background presence (a natural home for
+ * the watched-source sync) and a quick show/quit menu.
+ */
+import { app, Tray, Menu, nativeImage, type BrowserWindow } from 'electron'
+import { getAppIconPath } from './binaries'
+
+let tray: Tray | null = null
+// True once the user has chosen to really quit (tray menu, or app.quit from the
+// updater) — lets the window 'close' handler tell "hide to tray" from "exit".
+let quitting = false
+
+export function isQuitting(): boolean {
+  return quitting
+}
+
+export function markQuitting(): void {
+  quitting = true
+}
+
+function show(getWindow: () => BrowserWindow | null): void {
+  const win = getWindow()
+  if (!win) return
+  if (win.isMinimized()) win.restore()
+  win.show()
+  win.focus()
+}
+
+/** Create the tray icon + menu once. No-op if it already exists or the icon is missing. */
+export function createTray(getWindow: () => BrowserWindow | null): void {
+  if (tray) return
+  const icon = nativeImage.createFromPath(getAppIconPath())
+  // Without a usable icon a Windows tray entry is invisible/unclickable, which is
+  // worse than no tray — so skip it rather than ship a dead tray.
+  if (icon.isEmpty()) return
+
+  tray = new Tray(icon)
+  tray.setToolTip('AeroFetch')
+  tray.setContextMenu(
+    Menu.buildFromTemplate([
+      { label: 'Show AeroFetch', click: () => show(getWindow) },
+      { type: 'separator' },
+      {
+        label: 'Quit AeroFetch',
+        click: () => {
+          quitting = true
+          app.quit()
+        }
+      }
+    ])
+  )
+  tray.on('click', () => show(getWindow))
+}

src/main/ytdlp.ts

@@ -1,13 +1,37 @@
 import { execFile } from 'child_process'
-import { existsSync } from 'fs'
+import { existsSync, mkdirSync, copyFileSync } from 'fs'
-import { getYtdlpPath } from './binaries'
+import { dirname } from 'path'
+import { getYtdlpPath, getBundledYtdlpPath } from './binaries'
+import { getSettings, setSettings } from './settings'
+import { shouldAutoCheckYtdlp } from './ytdlpPolicy'
 import {
   isYtdlpUpdateChannel,
   type YtdlpVersionResult,
   type YtdlpUpdateChannel,
-  type YtdlpUpdateResult
+  type YtdlpUpdateResult,
+  type YtdlpAutoUpdateStatus
 } from '@shared/ipc'
 
+/**
+ * Ensure the writable managed yt-dlp.exe exists, copying the bundled seed in if
+ * it doesn't (first run, or after the user/AV deleted it). Best-effort and
+ * idempotent — when the copy is already present this is just one existsSync, so
+ * it's cheap to call before any spawn/update. Does nothing if the seed itself is
+ * gone (a broken install); callers surface their own missing-binary error then.
+ */
+export function ensureManagedYtdlp(): void {
+  const managed = getYtdlpPath()
+  if (existsSync(managed)) return
+  const seed = getBundledYtdlpPath()
+  if (!existsSync(seed)) return
+  try {
+    mkdirSync(dirname(managed), { recursive: true })
+    copyFileSync(seed, managed)
+  } catch {
+    /* best-effort; a failed seed just leaves the managed copy absent */
+  }
+}
+
 /**
  * Step-1 spike: spawn the bundled yt-dlp and read back `--version`.
  * Proves the main-process → bundled-binary → IPC path end to end.
@@ -51,6 +75,9 @@ export function updateYtdlp(channel: YtdlpUpdateChannel): Promise<YtdlpUpdateRes
     return Promise.resolve({ ok: false, error: 'Unsupported update channel.' })
   }
 
+  // Self-heal: restore the managed copy from the bundled seed before updating, so
+  // a deleted yt-dlp.exe is re-seeded and then updated in one click.
+  ensureManagedYtdlp()
   const ytdlpPath = getYtdlpPath()
 
   if (!existsSync(ytdlpPath)) {
@@ -78,3 +105,45 @@ export function updateYtdlp(channel: YtdlpUpdateChannel): Promise<YtdlpUpdateRes
     )
   })
 }
+
+/**
+ * Startup yt-dlp maintenance: always seed the managed copy, then — if auto-update
+ * is on and the daily throttle has elapsed — self-update it to the configured
+ * channel. Whether it changed is decided by comparing `--version` before/after
+ * (robust against yt-dlp's localized "up to date" wording). Status is pushed to
+ * the renderer so the Settings UI reflects a check it didn't trigger.
+ *
+ * Best-effort: every failure path still records the attempt time (so an
+ * unreachable update server doesn't re-hit the network every launch) and never
+ * throws — a stale binary must never block the app from starting.
+ */
+export async function runStartupYtdlpAutoUpdate(
+  send: (status: YtdlpAutoUpdateStatus) => void
+): Promise<void> {
+  ensureManagedYtdlp()
+  const settings = getSettings()
+  if (!shouldAutoCheckYtdlp(settings.autoUpdateYtdlp, settings.ytdlpLastUpdateCheck, Date.now())) {
+    return
+  }
+
+  const channel = settings.ytdlpChannel
+  send({ phase: 'checking', channel })
+
+  const before = await getYtdlpVersion()
+  const result = await updateYtdlp(channel)
+  setSettings({ ytdlpLastUpdateCheck: Date.now() })
+
+  if (!result.ok) {
+    send({ phase: 'error', channel, error: result.error, checkedAt: Date.now() })
+    return
+  }
+
+  const after = await getYtdlpVersion()
+  const changed = before.ok && after.ok && before.version !== after.version
+  send({
+    phase: changed ? 'updated' : 'current',
+    channel,
+    version: after.ok ? after.version : undefined,
+    checkedAt: Date.now()
+  })
+}

src/main/ytdlpPolicy.ts

@@ -0,0 +1,25 @@
+/**
+ * Pure auto-update scheduling policy for yt-dlp. Kept free of any electron /
+ * node-runtime dependency (like buildArgs.ts) so the throttle can be unit-tested
+ * without spinning up Electron. ytdlp.ts imports these to drive the real check.
+ */
+
+/** Once-a-day throttle for the startup auto-update check. */
+export const AUTO_UPDATE_INTERVAL_MS = 24 * 60 * 60 * 1000
+
+/**
+ * Whether a background yt-dlp update check should run now: only when auto-update
+ * is enabled AND at least one interval has elapsed since the last check. A
+ * zero/absent lastCheck means "never checked" → run. `now` and the interval are
+ * passed in so the decision is a pure function of its inputs.
+ */
+export function shouldAutoCheckYtdlp(
+  enabled: boolean,
+  lastCheck: number,
+  now: number,
+  intervalMs: number = AUTO_UPDATE_INTERVAL_MS
+): boolean {
+  if (!enabled) return false
+  if (!lastCheck) return true
+  return now - lastCheck >= intervalMs
+}

src/preload/index.ts

@@ -7,6 +7,8 @@ import {
   type YtdlpVersionResult,
   type YtdlpUpdateChannel,
   type YtdlpUpdateResult,
+  type YtdlpAutoUpdateStatus,
+  type FfmpegVersionResult,
   type ProbeResult,
   type StartDownloadOptions,
   type StartDownloadResult,
@@ -26,7 +28,10 @@ import {
   type IndexProgress,
   type IndexSourceResult,
   type SyncResult,
-  type ScheduledSyncStatus
+  type ScheduledSyncStatus,
+  type TerminalEvent,
+  type TerminalRunResult,
+  type TaskbarProgress
 } from '@shared/ipc'
 
 // The surface exposed to the renderer. Keep this thin: it only forwards to IPC.
@@ -55,6 +60,10 @@ const api = {
   getYtdlpVersion: (): Promise<YtdlpVersionResult> =>
     ipcRenderer.invoke(IpcChannels.ytdlpVersion),
 
+  /** Versions of the bundled ffmpeg + ffprobe (display-only; not auto-updated). */
+  getFfmpegVersions: (): Promise<FfmpegVersionResult> =>
+    ipcRenderer.invoke(IpcChannels.ffmpegVersion),
+
   probe: (url: string): Promise<ProbeResult> => ipcRenderer.invoke(IpcChannels.probe, url),
 
   startDownload: (opts: StartDownloadOptions): Promise<StartDownloadResult> =>
@@ -63,6 +72,9 @@ const api = {
   cancelDownload: (id: string): Promise<void> =>
     ipcRenderer.invoke(IpcChannels.downloadCancel, id),
 
+  pauseDownload: (id: string): Promise<void> =>
+    ipcRenderer.invoke(IpcChannels.downloadPause, id),
+
   getDefaultFolder: (): Promise<string> => ipcRenderer.invoke(IpcChannels.defaultFolder),
 
   chooseFolder: (): Promise<string | null> => ipcRenderer.invoke(IpcChannels.chooseFolder),
@@ -115,6 +127,13 @@ const api = {
   updateYtdlp: (channel: YtdlpUpdateChannel): Promise<YtdlpUpdateResult> =>
     ipcRenderer.invoke(IpcChannels.ytdlpUpdate, channel),
 
+  /** Subscribe to background yt-dlp auto-update status. Returns an unsubscribe function. */
+  onYtdlpAutoUpdateStatus: (cb: (s: YtdlpAutoUpdateStatus) => void): (() => void) => {
+    const listener = (_e: IpcRendererEvent, s: YtdlpAutoUpdateStatus): void => cb(s)
+    ipcRenderer.on(IpcChannels.ytdlpAutoUpdateStatus, listener)
+    return () => ipcRenderer.removeListener(IpcChannels.ytdlpAutoUpdateStatus, listener)
+  },
+
   listErrorLog: (): Promise<ErrorLogEntry[]> => ipcRenderer.invoke(IpcChannels.errorLogList),
 
   clearErrorLog: (): Promise<ErrorLogEntry[]> => ipcRenderer.invoke(IpcChannels.errorLogClear),
@@ -193,7 +212,27 @@ const api = {
     const listener = (_e: IpcRendererEvent, p: IndexProgress): void => cb(p)
     ipcRenderer.on(IpcChannels.indexProgress, listener)
     return () => ipcRenderer.removeListener(IpcChannels.indexProgress, listener)
-  }
+  },
+
+  // --- Built-in yt-dlp terminal (Phase N) ---
+
+  /** Run the bundled yt-dlp with raw args; output streams via onTerminalOutput. */
+  runTerminal: (id: string, args: string): Promise<TerminalRunResult> =>
+    ipcRenderer.invoke(IpcChannels.terminalRun, id, args),
+
+  cancelTerminal: (id: string): Promise<void> =>
+    ipcRenderer.invoke(IpcChannels.terminalCancel, id),
+
+  /** Subscribe to live terminal output. Returns an unsubscribe function. */
+  onTerminalOutput: (cb: (ev: TerminalEvent) => void): (() => void) => {
+    const listener = (_e: IpcRendererEvent, ev: TerminalEvent): void => cb(ev)
+    ipcRenderer.on(IpcChannels.terminalOutput, listener)
+    return () => ipcRenderer.removeListener(IpcChannels.terminalOutput, listener)
+  },
+
+  /** Reflect overall queue progress on the Windows taskbar (fire-and-forget). */
+  setTaskbarProgress: (p: TaskbarProgress): void =>
+    ipcRenderer.send(IpcChannels.taskbarProgress, p)
 }
 
 export type Api = typeof api

src/renderer/src/App.tsx

@@ -4,10 +4,14 @@ import { Sidebar, type TabValue } from './components/Sidebar'
 import { DownloadsView } from './components/DownloadsView'
 import { LibraryView } from './components/LibraryView'
 import { HistoryView } from './components/HistoryView'
+import { TerminalView } from './components/TerminalView'
 import { SettingsView } from './components/SettingsView'
 import { Onboarding } from './components/Onboarding'
+import { CommandPalette, type PaletteAction } from './components/CommandPalette'
 import { getTheme, pageBackground } from './theme'
 import { useSettings } from './store/settings'
+import { useDownloads } from './store/downloads'
+import { summarizeQueue } from './store/queueStats'
 import { useResolvedDark } from './store/systemTheme'
 
 const useStyles = makeStyles({
@@ -34,6 +38,55 @@ function App(): React.JSX.Element {
   const updateSettings = useSettings((s) => s.update)
   const isDark = useResolvedDark()
   const [tab, setTab] = useState<TabValue>('downloads')
+  const [paletteOpen, setPaletteOpen] = useState(false)
+
+  // Ctrl/Cmd+K toggles the command palette.
+  useEffect(() => {
+    function onKey(e: KeyboardEvent): void {
+      if ((e.ctrlKey || e.metaKey) && (e.key === 'k' || e.key === 'K')) {
+        e.preventDefault()
+        setPaletteOpen((o) => !o)
+      }
+    }
+    window.addEventListener('keydown', onKey)
+    return () => window.removeEventListener('keydown', onKey)
+  }, [])
+
+  // Mirror overall queue progress onto the Windows taskbar. Subscribe to the store
+  // directly (not via a selector) so taskbar updates don't re-render the app.
+  useEffect(() => {
+    function push(items: ReturnType<typeof useDownloads.getState>['items']): void {
+      const s = summarizeQueue(items)
+      const mode = s.active ? (s.failed > 0 ? 'error' : 'normal') : 'none'
+      window.api?.setTaskbarProgress?.({ fraction: s.progress, mode })
+    }
+    push(useDownloads.getState().items)
+    return useDownloads.subscribe((st) => push(st.items))
+  }, [])
+
+  const paletteActions: PaletteAction[] = [
+    { id: 'go-downloads', label: 'Go to Downloads', hint: 'Navigate', run: () => setTab('downloads') },
+    { id: 'go-library', label: 'Go to Library', hint: 'Navigate', run: () => setTab('library') },
+    { id: 'go-history', label: 'Go to History', hint: 'Navigate', run: () => setTab('history') },
+    { id: 'go-terminal', label: 'Go to Terminal', hint: 'Navigate', run: () => setTab('terminal') },
+    { id: 'go-settings', label: 'Go to Settings', hint: 'Navigate', run: () => setTab('settings') },
+    {
+      id: 'new-download',
+      label: 'New download',
+      hint: 'Focus URL',
+      run: () => {
+        setTab('downloads')
+        // Wait for the download bar to mount after the tab switch, then focus.
+        setTimeout(() => document.getElementById('aerofetch-url')?.focus(), 60)
+      }
+    },
+    {
+      id: 'toggle-theme',
+      label: isDark ? 'Switch to light theme' : 'Switch to dark theme',
+      hint: 'Appearance',
+      run: () => updateSettings({ theme: isDark ? 'light' : 'dark' })
+    }
+  ]
 
   // AeroFetch's own version, shown in the sidebar. Loaded once over IPC.
   const [version, setVersion] = useState('')
@@ -89,8 +142,13 @@ function App(): React.JSX.Element {
               {tab === 'downloads' && <DownloadsView />}
               {tab === 'library' && <LibraryView />}
               {tab === 'history' && <HistoryView />}
+              {tab === 'terminal' && <TerminalView />}
               {tab === 'settings' && <SettingsView />}
             </main>
+
+            {paletteOpen && (
+              <CommandPalette actions={paletteActions} onClose={() => setPaletteOpen(false)} />
+            )}
           </>
         )}
       </div>

src/renderer/src/components/CommandPalette.tsx

@@ -0,0 +1,167 @@
+import { useEffect, useRef, useState } from 'react'
+import { makeStyles, mergeClasses, tokens, shorthands } from '@fluentui/react-components'
+
+export interface PaletteAction {
+  id: string
+  label: string
+  /** short right-aligned hint, e.g. a shortcut or category */
+  hint?: string
+  run: () => void
+}
+
+const useStyles = makeStyles({
+  // A plain fixed overlay — NOT a Fluent Dialog, since this app avoids Fluent's
+  // portal-based overlays (GPU/driver blank-overlay issue, see Select.tsx).
+  backdrop: {
+    position: 'fixed',
+    inset: 0,
+    zIndex: 1000,
+    display: 'flex',
+    justifyContent: 'center',
+    alignItems: 'flex-start',
+    paddingTop: '14vh',
+    backgroundColor: 'rgba(0,0,0,0.32)'
+  },
+  panel: {
+    width: 'min(560px, 92vw)',
+    display: 'flex',
+    flexDirection: 'column',
+    backgroundColor: tokens.colorNeutralBackground1,
+    ...shorthands.borderRadius(tokens.borderRadiusXLarge),
+    border: `1px solid ${tokens.colorNeutralStroke2}`,
+    boxShadow: tokens.shadow28,
+    overflow: 'hidden'
+  },
+  input: {
+    appearance: 'none',
+    border: 'none',
+    outline: 'none',
+    padding: '14px 16px',
+    fontSize: tokens.fontSizeBase400,
+    fontFamily: tokens.fontFamilyBase,
+    backgroundColor: 'transparent',
+    color: tokens.colorNeutralForeground1,
+    borderBottom: `1px solid ${tokens.colorNeutralStroke2}`
+  },
+  list: {
+    maxHeight: '50vh',
+    overflowY: 'auto',
+    padding: '6px'
+  },
+  item: {
+    display: 'flex',
+    alignItems: 'center',
+    justifyContent: 'space-between',
+    gap: '12px',
+    width: '100%',
+    padding: '9px 12px',
+    border: 'none',
+    backgroundColor: 'transparent',
+    color: tokens.colorNeutralForeground1,
+    fontSize: tokens.fontSizeBase300,
+    fontFamily: tokens.fontFamilyBase,
+    textAlign: 'left',
+    cursor: 'pointer',
+    ...shorthands.borderRadius(tokens.borderRadiusMedium)
+  },
+  itemActive: {
+    backgroundColor: tokens.colorBrandBackground2,
+    color: tokens.colorBrandForeground2
+  },
+  itemHint: {
+    flexShrink: 0,
+    color: tokens.colorNeutralForeground3,
+    fontSize: tokens.fontSizeBase200
+  },
+  empty: {
+    padding: '14px 12px',
+    color: tokens.colorNeutralForeground3
+  }
+})
+
+/**
+ * A Ctrl/Cmd+K command palette (Phase N). Filter by typing, ↑/↓ to move, Enter to
+ * run, Esc or a backdrop click to dismiss. Actions are supplied by App.
+ */
+export function CommandPalette({
+  actions,
+  onClose
+}: {
+  actions: PaletteAction[]
+  onClose: () => void
+}): React.JSX.Element {
+  const styles = useStyles()
+  const [q, setQ] = useState('')
+  const [sel, setSel] = useState(0)
+  const inputRef = useRef<HTMLInputElement>(null)
+
+  const filtered = actions.filter((a) => a.label.toLowerCase().includes(q.trim().toLowerCase()))
+
+  useEffect(() => {
+    inputRef.current?.focus()
+  }, [])
+  useEffect(() => {
+    setSel(0)
+  }, [q])
+
+  function onKeyDown(e: React.KeyboardEvent): void {
+    if (e.key === 'Escape') {
+      onClose()
+    } else if (e.key === 'ArrowDown') {
+      e.preventDefault()
+      setSel((s) => Math.min(filtered.length - 1, s + 1))
+    } else if (e.key === 'ArrowUp') {
+      e.preventDefault()
+      setSel((s) => Math.max(0, s - 1))
+    } else if (e.key === 'Enter') {
+      e.preventDefault()
+      const a = filtered[sel]
+      if (a) {
+        a.run()
+        onClose()
+      }
+    }
+  }
+
+  return (
+    <div className={styles.backdrop} onClick={onClose}>
+      <div
+        className={styles.panel}
+        onClick={(e) => e.stopPropagation()}
+        role="dialog"
+        aria-label="Command palette"
+      >
+        <input
+          ref={inputRef}
+          className={styles.input}
+          value={q}
+          onChange={(e) => setQ(e.target.value)}
+          onKeyDown={onKeyDown}
+          placeholder="Type a command…"
+          aria-label="Command palette search"
+        />
+        <div className={styles.list}>
+          {filtered.length === 0 ? (
+            <div className={styles.empty}>No matching commands</div>
+          ) : (
+            filtered.map((a, i) => (
+              <button
+                key={a.id}
+                type="button"
+                className={mergeClasses(styles.item, i === sel && styles.itemActive)}
+                onClick={() => {
+                  a.run()
+                  onClose()
+                }}
+                onMouseEnter={() => setSel(i)}
+              >
+                <span>{a.label}</span>
+                {a.hint && <span className={styles.itemHint}>{a.hint}</span>}
+              </button>
+            ))
+          )}
+        </div>
+      </div>
+    </div>
+  )
+}

src/renderer/src/components/DownloadBar.tsx

@@ -1,6 +1,8 @@
 import { useState, useEffect, useRef } from 'react'
 import {
   Input,
+  Textarea,
+  Field,
   Button,
   Checkbox,
   Spinner,
@@ -20,10 +22,14 @@ import {
   ErrorCircleRegular,
   LinkRegular,
   DismissRegular,
-  AppsListRegular
+  AppsListRegular,
+  CutRegular,
+  CalendarClockRegular,
+  WarningRegular
 } from '@fluentui/react-icons'
 import type { MediaInfo, FormatOption, PlaylistInfo } from '@shared/ipc'
 import { useDownloads, QUALITY_OPTIONS, type MediaKind } from '../store/downloads'
+import { sameVideo } from '../store/queueStats'
 import { useSettings } from '../store/settings'
 import { Select } from './Select'
 import { Hint } from './Hint'
@@ -40,6 +46,23 @@ function looksLikeUrl(text: string): boolean {
   }
 }
 
+/** First http(s) URL in a blob of dropped text (one per line; '#' comments skipped). */
+function firstUrl(text: string): string | null {
+  for (const raw of text.split(/\r?\n/)) {
+    const line = raw.trim()
+    if (!line || line.startsWith('#')) continue
+    if (looksLikeUrl(line)) return line
+  }
+  return null
+}
+
+/** Pull the URL= target out of a dropped Windows .url Internet Shortcut file. */
+function parseUrlFile(content: string): string | null {
+  const m = /^\s*URL\s*=\s*(\S+)/im.exec(content)
+  const url = m?.[1]?.trim()
+  return url && looksLikeUrl(url) ? url : null
+}
+
 const useStyles = makeStyles({
   root: {
     display: 'flex',
@@ -50,6 +73,11 @@ const useStyles = makeStyles({
     ...shorthands.borderRadius(tokens.borderRadiusXLarge),
     boxShadow: tokens.shadow4
   },
+  // Highlight while a link / .url file is dragged over the card.
+  rootDragging: {
+    outline: `2px dashed ${tokens.colorBrandStroke1}`,
+    outlineOffset: '-2px'
+  },
   urlRow: {
     display: 'flex',
     gap: '8px'
@@ -195,10 +223,35 @@ const useStyles = makeStyles({
     overflowY: 'auto',
     paddingRight: '4px'
   },
+  plItemRow: {
+    display: 'flex',
+    alignItems: 'center',
+    gap: '8px'
+  },
   plItem: {
     display: 'flex',
     alignItems: 'flex-start',
-    padding: '2px 0'
+    padding: '2px 0',
+    flexGrow: 1,
+    minWidth: 0
+  },
+  plKindBtn: {
+    flexShrink: 0,
+    appearance: 'none',
+    border: 'none',
+    backgroundColor: 'transparent',
+    color: tokens.colorNeutralForeground3,
+    display: 'flex',
+    alignItems: 'center',
+    justifyContent: 'center',
+    width: '28px',
+    height: '28px',
+    cursor: 'pointer',
+    ...shorthands.borderRadius(tokens.borderRadiusMedium),
+    ':hover': {
+      backgroundColor: tokens.colorNeutralBackground1Hover,
+      color: tokens.colorNeutralForeground2
+    }
   },
   plItemLabel: {
     display: 'flex',
@@ -212,12 +265,52 @@ const useStyles = makeStyles({
   },
   plItemMeta: {
     color: tokens.colorNeutralForeground3
+  },
+  // --- duplicate warning ---
+  dupRow: {
+    display: 'flex',
+    alignItems: 'center',
+    gap: '8px',
+    padding: '8px 8px 8px 12px',
+    backgroundColor: tokens.colorStatusWarningBackground1,
+    color: tokens.colorStatusWarningForeground1,
+    ...shorthands.borderRadius(tokens.borderRadiusLarge)
+  },
+  // --- trim / schedule panels ---
+  trimBlock: {
+    display: 'flex',
+    flexDirection: 'column',
+    gap: '8px',
+    alignItems: 'flex-start'
+  },
+  optButtons: {
+    display: 'flex',
+    gap: '8px'
+  },
+  trimPanel: {
+    alignSelf: 'stretch',
+    padding: '12px',
+    backgroundColor: tokens.colorNeutralBackground2,
+    ...shorthands.borderRadius(tokens.borderRadiusLarge),
+    border: `1px solid ${tokens.colorNeutralStroke2}`
+  },
+  // Native datetime-local input, themed to sit beside the Fluent controls.
+  dtInput: {
+    fontFamily: tokens.fontFamilyBase,
+    fontSize: tokens.fontSizeBase300,
+    padding: '6px 10px',
+    ...shorthands.borderRadius(tokens.borderRadiusMedium),
+    border: `1px solid ${tokens.colorNeutralStroke1}`,
+    backgroundColor: tokens.colorNeutralBackground1,
+    color: tokens.colorNeutralForeground1,
+    colorScheme: 'light dark'
   }
 })
 
 export function DownloadBar(): React.JSX.Element {
   const styles = useStyles()
   const addFromUrl = useDownloads((s) => s.addFromUrl)
+  const addMany = useDownloads((s) => s.addMany)
   const settingsLoaded = useSettings((s) => s.loaded)
   const defaultKind = useSettings((s) => s.defaultKind)
   const defaultVideoQuality = useSettings((s) => s.defaultVideoQuality)
@@ -227,6 +320,47 @@ export function DownloadBar(): React.JSX.Element {
   const [kind, setKind] = useState<MediaKind>('video')
   const [quality, setQuality] = useState(QUALITY_OPTIONS.video[0])
 
+  // Optional trim: keep only certain time ranges. Raw text, normalised in main.
+  const [showTrim, setShowTrim] = useState(false)
+  const [trim, setTrim] = useState('')
+
+  // Optional schedule: a datetime-local value; a future time parks the download.
+  const [showSchedule, setShowSchedule] = useState(false)
+  const [scheduleAt, setScheduleAt] = useState('')
+
+  // Drag-and-drop: highlight while a link / .url file hovers the card.
+  const [dragActive, setDragActive] = useState(false)
+
+  // Duplicate guard: warn before enqueuing a URL already in the active queue.
+  const [dup, setDup] = useState<string | null>(null)
+  const confirmDup = useRef(false)
+
+  function onDragOver(e: React.DragEvent): void {
+    e.preventDefault()
+    if (!dragActive) setDragActive(true)
+  }
+  function onDrop(e: React.DragEvent): void {
+    e.preventDefault()
+    setDragActive(false)
+    const dt = e.dataTransfer
+    const fromText = firstUrl(dt.getData('text/uri-list') || dt.getData('text/plain') || '')
+    if (fromText) {
+      onUrlChange(fromText)
+      return
+    }
+    // A dropped Windows .url Internet Shortcut — read its URL= line.
+    const file = Array.from(dt.files).find((f) => f.name.toLowerCase().endsWith('.url'))
+    if (file) {
+      file
+        .text()
+        .then((content) => {
+          const u = parseUrlFile(content)
+          if (u) onUrlChange(u)
+        })
+        .catch(() => {})
+    }
+  }
+
   // Apply the saved default format once, when persisted settings first arrive.
   const appliedDefaults = useRef(false)
   useEffect(() => {
@@ -246,6 +380,9 @@ export function DownloadBar(): React.JSX.Element {
   // Probe state for a playlist URL.
   const [playlist, setPlaylist] = useState<PlaylistInfo | null>(null)
   const [selected, setSelected] = useState<Set<number>>(new Set())
+  // Per-entry kind override (entry.index → 'video' | 'audio'); absent = use the
+  // bar's global kind. Lets a playlist mix video and audio downloads.
+  const [itemKinds, setItemKinds] = useState<Record<number, MediaKind>>({})
 
   // Clipboard auto-detect: when the window gains focus and the clipboard holds a
   // fresh link, offer it (without clobbering anything the user is already typing).
@@ -316,12 +453,15 @@ export function DownloadBar(): React.JSX.Element {
     setFormatId('')
     setPlaylist(null)
     setSelected(new Set())
+    setItemKinds({})
   }
 
   function onUrlChange(next: string): void {
     setUrl(next)
-    // Any probed info is stale once the URL changes.
+    // Any probed info — or a duplicate warning — is stale once the URL changes.
     if (info || probeError || playlist) clearProbe()
+    if (dup) setDup(null)
+    confirmDup.current = false
   }
 
   function onKindChange(next: MediaKind): void {
@@ -379,10 +519,41 @@ export function DownloadBar(): React.JSX.Element {
     setSelected(allSelected ? new Set() : new Set(playlist.entries.map((e) => e.index)))
   }
 
+  // Per-entry kind: the override if set, else the bar's global kind.
+  function effKind(index: number): MediaKind {
+    return itemKinds[index] ?? kind
+  }
+  function toggleItemKind(index: number): void {
+    setItemKinds((m) => ({ ...m, [index]: effKind(index) === 'audio' ? 'video' : 'audio' }))
+  }
+  function setAllKinds(k: MediaKind): void {
+    if (!playlist) return
+    const all: Record<number, MediaKind> = {}
+    for (const e of playlist.entries) all[e.index] = k
+    setItemKinds(all)
+  }
+
   function download(): void {
     const trimmed = url.trim()
     if (!trimmed) return
 
+    // Duplicate guard: if this URL is already in the queue (and the user hasn't
+    // confirmed via "Download anyway"), warn instead of silently enqueuing a copy.
+    // Canceled/failed items don't count — re-adding those is a legitimate retry.
+    if (!confirmDup.current) {
+      const existing = useDownloads
+        .getState()
+        .items.find(
+          (i) => i.status !== 'canceled' && i.status !== 'error' && sameVideo(i.url, trimmed)
+        )
+      if (existing) {
+        setDup(existing.title)
+        return
+      }
+    }
+    confirmDup.current = false
+    setDup(null)
+
     const meta = info
       ? {
           title: info.title,
@@ -392,9 +563,14 @@ export function DownloadBar(): React.JSX.Element {
         }
       : {}
 
+    const trimSpec = trim.trim() || undefined
+    const scheduledFor = scheduleAt ? new Date(scheduleAt).getTime() : undefined
+
     if (usingFormats && selectedFormat) {
       addFromUrl(trimmed, 'video', selectedFormat.label, {
         ...meta,
+        trim: trimSpec,
+        scheduledFor,
         format: {
           id: selectedFormat.id,
           hasAudio: selectedFormat.hasAudio,
@@ -402,32 +578,53 @@ export function DownloadBar(): React.JSX.Element {
         }
       })
     } else {
-      addFromUrl(trimmed, kind, quality, meta)
+      addFromUrl(trimmed, kind, quality, { ...meta, trim: trimSpec, scheduledFor })
     }
 
     setUrl('')
+    setTrim('')
+    setShowTrim(false)
+    setScheduleAt('')
+    setShowSchedule(false)
     clearProbe()
   }
 
+  function downloadAnyway(): void {
+    confirmDup.current = true
+    download()
+  }
+
   function addPlaylist(): void {
     if (!playlist) return
     const chosen = playlist.entries.filter((e) => selected.has(e.index))
-    for (const e of chosen) {
+    // Each entry uses its own kind override; quality falls back to that kind's
-      addFromUrl(e.url, kind, quality, {
+    // default unless the entry matches the bar's current kind/quality.
-        title: e.title,
+    addMany(
-        channel: e.uploader,
+      chosen.map((e) => {
-        durationLabel: e.durationLabel
+        const k = effKind(e.index)
+        return {
+          url: e.url,
+          kind: k,
+          quality: k === kind ? quality : QUALITY_OPTIONS[k][0],
+          opts: { title: e.title, channel: e.uploader, durationLabel: e.durationLabel }
+        }
       })
-    }
+    )
     setUrl('')
     clearProbe()
   }
 
   return (
-    <div className={styles.root}>
+    <div
+      className={mergeClasses(styles.root, dragActive && styles.rootDragging)}
+      onDragOver={onDragOver}
+      onDragLeave={() => setDragActive(false)}
+      onDrop={onDrop}
+    >
       <div className={styles.urlRow}>
         <Input
           className={styles.url}
+          input={{ id: 'aerofetch-url' }}
           value={url}
           onChange={(_, d) => onUrlChange(d.value)}
           onKeyDown={(e) => e.key === 'Enter' && fetchFormats()}
@@ -474,6 +671,23 @@ export function DownloadBar(): React.JSX.Element {
         </div>
       )}
 
+      {dup && (
+        <div className={styles.dupRow}>
+          <WarningRegular />
+          <Caption1 className={styles.suggestionText}>Already in your queue: “{dup}”.</Caption1>
+          <Button size="small" appearance="primary" onClick={downloadAnyway}>
+            Download anyway
+          </Button>
+          <Button
+            size="small"
+            appearance="subtle"
+            icon={<DismissRegular />}
+            onClick={() => setDup(null)}
+            aria-label="Dismiss"
+          />
+        </div>
+      )}
+
       {probing && (
         <div className={styles.statusRow}>
           <Spinner size="tiny" />
@@ -524,32 +738,108 @@ export function DownloadBar(): React.JSX.Element {
             <Button size="small" appearance="subtle" onClick={toggleAll}>
               {allSelected ? 'Select none' : 'Select all'}
             </Button>
+            <Button size="small" appearance="subtle" onClick={() => setAllKinds('video')}>
+              All video
+            </Button>
+            <Button size="small" appearance="subtle" onClick={() => setAllKinds('audio')}>
+              All audio
+            </Button>
           </div>
           <div className={styles.plList}>
             {playlist.entries.map((e) => (
-              <Checkbox
+              <div key={e.index} className={styles.plItemRow}>
-                key={e.index}
+                <Checkbox
-                className={styles.plItem}
+                  className={styles.plItem}
-                checked={selected.has(e.index)}
+                  checked={selected.has(e.index)}
-                onChange={(_, d) => toggleEntry(e.index, !!d.checked)}
+                  onChange={(_, d) => toggleEntry(e.index, !!d.checked)}
-                label={
+                  label={
-                  <span className={styles.plItemLabel}>
+                    <span className={styles.plItemLabel}>
-                    <span className={styles.plItemTitle}>
+                      <span className={styles.plItemTitle}>
-                      {e.index}. {e.title}
+                        {e.index}. {e.title}
+                      </span>
+                      {(e.durationLabel || e.uploader) && (
+                        <Caption1 className={styles.plItemMeta}>
+                          {[e.durationLabel, e.uploader].filter(Boolean).join('  •  ')}
+                        </Caption1>
+                      )}
                     </span>
-                    {(e.durationLabel || e.uploader) && (
+                  }
-                      <Caption1 className={styles.plItemMeta}>
+                />
-                        {[e.durationLabel, e.uploader].filter(Boolean).join('  •  ')}
+                <Hint
-                      </Caption1>
+                  label={
-                    )}
+                    effKind(e.index) === 'audio' ? 'Audio — click for video' : 'Video — click for audio'
-                  </span>
+                  }
-                }
+                  placement="top"
-              />
+                  align="end"
+                >
+                  <button
+                    type="button"
+                    className={styles.plKindBtn}
+                    onClick={() => toggleItemKind(e.index)}
+                    aria-label={`Download type for ${e.title}: ${effKind(e.index)}`}
+                  >
+                    {effKind(e.index) === 'audio' ? <MusicNote2Regular /> : <VideoClipRegular />}
+                  </button>
+                </Hint>
+              </div>
             ))}
           </div>
         </div>
       )}
 
+      {!playlist && (
+        <div className={styles.trimBlock}>
+          <div className={styles.optButtons}>
+            <Button
+              size="small"
+              appearance="subtle"
+              icon={<CutRegular />}
+              onClick={() => setShowTrim((v) => !v)}
+            >
+              {trim.trim() ? 'Trim · on' : 'Trim'}
+            </Button>
+            <Button
+              size="small"
+              appearance="subtle"
+              icon={<CalendarClockRegular />}
+              onClick={() => setShowSchedule((v) => !v)}
+            >
+              {scheduleAt ? 'Scheduled' : 'Schedule'}
+            </Button>
+          </div>
+          {showTrim && (
+            <div className={styles.trimPanel}>
+              <Field
+                label="Sections to keep"
+                hint="Time ranges like 1:30-2:00 — one per line or comma-separated. Leave empty to download the whole thing."
+              >
+                <Textarea
+                  value={trim}
+                  onChange={(_, d) => setTrim(d.value)}
+                  placeholder={'0:30-1:45\n3:00-3:30'}
+                  resize="vertical"
+                />
+              </Field>
+            </div>
+          )}
+          {showSchedule && (
+            <div className={styles.trimPanel}>
+              <Field
+                label="Start at"
+                hint="Pick a date and time to start this download. Leave empty to start now. Scheduled downloads only fire while AeroFetch is running."
+              >
+                <input
+                  type="datetime-local"
+                  className={styles.dtInput}
+                  value={scheduleAt}
+                  onChange={(e) => setScheduleAt(e.target.value)}
+                />
+              </Field>
+            </div>
+          )}
+        </div>
+      )}
+
       <div className={styles.controls}>
         <div className={styles.control}>
           <Caption1>Format</Caption1>
@@ -606,11 +896,11 @@ export function DownloadBar(): React.JSX.Element {
           <Button
             appearance="primary"
             size="large"
-            icon={<ArrowDownloadRegular />}
+            icon={scheduleAt ? <CalendarClockRegular /> : <ArrowDownloadRegular />}
             onClick={download}
             disabled={!url.trim()}
           >
-            Download
+            {scheduleAt ? 'Schedule' : 'Download'}
           </Button>
         )}
       </div>

src/renderer/src/components/DownloadOptionsForm.tsx

@@ -133,6 +133,17 @@ export function DownloadOptionsForm({ value, onChange }: Props): React.JSX.Eleme
         </Field>
       </div>
 
+      <Field
+        label="Format sorting (advanced)"
+        hint="Raw yt-dlp -S string to rank formats by priority, e.g. res:1080,vcodec:av01,size. Overrides the preferred-codec tiebreaker. Leave empty unless you know yt-dlp's -S syntax."
+      >
+        <Input
+          value={value.formatSort}
+          placeholder="res,fps,vcodec:av01"
+          onChange={(_, d) => setOpt('formatSort', d.value)}
+        />
+      </Field>
+
       <Field label="Embed subtitles" hint="Download subtitles and mux them into the video.">
         <Switch
           checked={value.embedSubtitles}
@@ -204,6 +215,16 @@ export function DownloadOptionsForm({ value, onChange }: Props): React.JSX.Eleme
           label={value.embedChapters ? 'On' : 'Off'}
         />
       </Field>
+      <Field
+        label="Split by chapters"
+        hint="Also save each chapter as its own file. The full-length file is kept too."
+      >
+        <Switch
+          checked={value.splitChapters}
+          onChange={(_, d) => setOpt('splitChapters', d.checked)}
+          label={value.splitChapters ? 'On' : 'Off'}
+        />
+      </Field>
       <Field label="Embed metadata" hint="Title, artist, date and similar tags.">
         <Switch
           checked={value.embedMetadata}

src/renderer/src/components/DownloadsView.tsx

@@ -1,30 +1,61 @@
 import {
   Subtitle2,
   Body1,
+  Caption1,
   Button,
+  ProgressBar,
   makeStyles,
-  tokens
+  tokens,
+  shorthands
 } from '@fluentui/react-components'
-import { ArrowDownloadRegular } from '@fluentui/react-icons'
+import { ArrowDownloadRegular, ArrowClockwiseRegular } from '@fluentui/react-icons'
 import { useDownloads } from '../store/downloads'
+import { summarizeQueue } from '../store/queueStats'
 import { DownloadBar } from './DownloadBar'
 import { QueueItem } from './QueueItem'
+import { VirtualList } from './VirtualList'
 
 const useStyles = makeStyles({
   root: {
+    // Fill the scroll area so the queue list below can flex to the remaining
+    // height and scroll internally (it's virtualized), instead of the whole page
+    // growing to thousands of rows.
     display: 'flex',
     flexDirection: 'column',
-    gap: '20px'
+    gap: '20px',
+    height: '100%'
   },
   queueHeader: {
     display: 'flex',
     alignItems: 'center',
     justifyContent: 'space-between'
   },
-  list: {
+  headerActions: {
     display: 'flex',
-    flexDirection: 'column',
+    gap: '8px'
-    gap: '10px'
+  },
+  summary: {
+    display: 'flex',
+    alignItems: 'center',
+    gap: '12px',
+    padding: '10px 14px',
+    backgroundColor: tokens.colorNeutralBackground1,
+    ...shorthands.borderRadius(tokens.borderRadiusLarge),
+    border: `1px solid ${tokens.colorNeutralStroke2}`
+  },
+  summaryBar: {
+    flexGrow: 1
+  },
+  summaryText: {
+    flexShrink: 0,
+    color: tokens.colorNeutralForeground3,
+    whiteSpace: 'nowrap'
+  },
+  listScroll: {
+    flexGrow: 1,
+    // min-height:0 lets this flex child shrink below its content height so it,
+    // not the page, owns the scrolling.
+    minHeight: 0
   },
   empty: {
     display: 'flex',
@@ -41,7 +72,9 @@ export function DownloadsView(): React.JSX.Element {
   const styles = useStyles()
   const items = useDownloads((s) => s.items)
   const clearFinished = useDownloads((s) => s.clearFinished)
+  const retryAll = useDownloads((s) => s.retryAll)
 
+  const summary = summarizeQueue(items)
   const hasFinished = items.some(
     (i) => i.status === 'completed' || i.status === 'error' || i.status === 'canceled'
   )
@@ -50,13 +83,37 @@ export function DownloadsView(): React.JSX.Element {
     <div className={styles.root}>
       <DownloadBar />
 
+      {summary.active && (
+        <div className={styles.summary}>
+          <ProgressBar className={styles.summaryBar} value={summary.progress} thickness="large" />
+          <Caption1 className={styles.summaryText}>
+            {summary.downloading} downloading
+            {summary.queued ? `, ${summary.queued} queued` : ''}
+            {summary.speedLabel ? `  •  ${summary.speedLabel}` : ''}
+            {summary.etaLabel ? `  •  ~${summary.etaLabel} left` : ''}
+          </Caption1>
+        </div>
+      )}
+
       <div className={styles.queueHeader}>
         <Subtitle2>Queue ({items.length})</Subtitle2>
-        {hasFinished && (
+        <div className={styles.headerActions}>
-          <Button size="small" appearance="subtle" onClick={clearFinished}>
+          {summary.failed > 0 && (
-            Clear finished
+            <Button
-          </Button>
+              size="small"
-        )}
+              appearance="subtle"
+              icon={<ArrowClockwiseRegular />}
+              onClick={retryAll}
+            >
+              Retry all failed ({summary.failed})
+            </Button>
+          )}
+          {hasFinished && (
+            <Button size="small" appearance="subtle" onClick={clearFinished}>
+              Clear finished
+            </Button>
+          )}
+        </div>
       </div>
 
       {items.length === 0 ? (
@@ -65,11 +122,15 @@ export function DownloadsView(): React.JSX.Element {
           <Body1>Nothing queued yet. Paste a URL above to get started.</Body1>
         </div>
       ) : (
-        <div className={styles.list}>
+        <VirtualList
-          {items.map((item) => (
+          items={items}
-            <QueueItem key={item.id} item={item} />
+          className={styles.listScroll}
-          ))}
+          gap={10}
-        </div>
+          overscan={6}
+          estimateSize={() => 100}
+          getKey={(item) => item.id}
+          renderItem={(item) => <QueueItem item={item} />}
+        />
       )}
     </div>
   )

src/renderer/src/components/LibraryView.tsx

@@ -28,11 +28,12 @@ import {
   LibraryRegular
 } from '@fluentui/react-icons'
 import type { MediaItem, Source } from '@shared/ipc'
-import { useSources, MAX_ENQUEUE_BATCH } from '../store/sources'
+import { useSources } from '../store/sources'
 import { useSettings } from '../store/settings'
 import { useDownloads, type DownloadStatus } from '../store/downloads'
 import { thumbUrl } from '../thumb'
 import { MediaThumb } from './MediaThumb'
+import { VirtualList } from './VirtualList'
 
 // True in the standalone browser preview (no Electron preload).
 const PREVIEW = typeof window === 'undefined' || !window.electron
@@ -40,10 +41,24 @@ const PREVIEW = typeof window === 'undefined' || !window.electron
 /** Per-item status shown in the library: a live queue status, or pending/downloaded. */
 type ItemStatus = DownloadStatus | 'pending'
 
+/**
+ * A flattened row for the virtualized item list: either a playlist header or a
+ * single video. Flattening the groups into one list lets a 1000s-video source
+ * window cleanly (one virtualizer over a flat array, headers included).
+ */
+type LibRow =
+  | { kind: 'header'; title: string; items: MediaItem[] }
+  | { kind: 'item'; item: MediaItem }
+
+/** Above this many flattened rows, the item list switches to a virtualized panel. */
+const VIRTUALIZE_AT = 100
+
 const STATUS_LABEL: Record<ItemStatus, string> = {
   pending: 'Pending',
   queued: 'Queued',
   downloading: 'Downloading',
+  paused: 'Paused',
+  saved: 'Saved',
   completed: 'Downloaded',
   error: 'Failed',
   canceled: 'Canceled'
@@ -134,22 +149,24 @@ const useStyles = makeStyles({
   },
   actionRow: { display: 'flex', alignItems: 'center', gap: '8px', flexWrap: 'wrap' },
   actionSpacer: { flexGrow: 1 },
-  group: { display: 'flex', flexDirection: 'column' },
   groupHead: {
     display: 'flex',
     alignItems: 'center',
     gap: '8px',
     padding: '6px 4px',
-    color: tokens.colorNeutralForeground2
+    color: tokens.colorNeutralForeground2,
+    cursor: 'pointer',
+    ...shorthands.borderRadius(tokens.borderRadiusMedium),
+    ':hover': { backgroundColor: tokens.colorNeutralBackground1Hover }
   },
   groupTitle: { fontWeight: tokens.fontWeightSemibold, flexGrow: 1, minWidth: 0 },
-  rows: { display: 'flex', flexDirection: 'column' },
   row: {
     display: 'flex',
     alignItems: 'center',
     gap: '10px',
     padding: '5px 4px 5px 18px'
   },
+  plainList: { display: 'flex', flexDirection: 'column' },
   rowThumb: {
     width: '60px',
     height: '34px',
@@ -236,7 +253,11 @@ export function LibraryView(): React.JSX.Element {
   const [url, setUrl] = useState('')
   const [error, setError] = useState<string | null>(null)
   const [selected, setSelected] = useState<Set<string>>(new Set())
+  const [batchNote, setBatchNote] = useState<string | null>(null)
   const [syncNote, setSyncNote] = useState<string | null>(null)
+  // Which playlist groups are expanded. Empty = all collapsed (the default), so
+  // an expanded source shows just its group headers until one is opened.
+  const [expandedGroups, setExpandedGroups] = useState<Set<string>>(new Set())
   const [scheduled, setScheduled] = useState(false)
 
   const watchedCount = sources.filter((s) => s.watched).length
@@ -261,8 +282,12 @@ export function LibraryView(): React.JSX.Element {
     if (res.error) setError(res.error)
   }
 
-  // Reset the selection whenever the expanded source changes.
+  // Reset the selection (and any batch note) whenever the expanded source changes.
-  useEffect(() => setSelected(new Set()), [selectedSourceId])
+  useEffect(() => {
+    setSelected(new Set())
+    setBatchNote(null)
+    setExpandedGroups(new Set())
+  }, [selectedSourceId])
 
   // Live per-URL queue status so a video row reflects its real download state.
   const statusByUrl = useMemo(() => {
@@ -273,12 +298,40 @@ export function LibraryView(): React.JSX.Element {
 
   const items = selectedSourceId ? (itemsBySource[selectedSourceId] ?? []) : []
   const groups = useMemo(() => groupByPlaylist(items), [items])
+  // A group is shown when toggled open, or auto-expanded when it's the only group
+  // (a single "Uploads" channel shouldn't need a second click to reach its videos).
+  const isGroupOpen = (title: string): boolean =>
+    groups.length === 1 || expandedGroups.has(title)
+  // Flatten groups → [header, ...its items, header, ...] for the virtualized list.
+  const flatRows = useMemo<LibRow[]>(() => {
+    const rows: LibRow[] = []
+    for (const g of groups) {
+      rows.push({ kind: 'header', title: g.title, items: g.items })
+      if (groups.length === 1 || expandedGroups.has(g.title)) {
+        for (const it of g.items) rows.push({ kind: 'item', item: it })
+      }
+    }
+    return rows
+  }, [groups, expandedGroups])
 
   const effStatus = (it: MediaItem): ItemStatus =>
     statusByUrl.get(it.url) ?? (it.downloaded ? 'completed' : 'pending')
 
   const pendingItems = items.filter((it) => effStatus(it) === 'pending')
 
+  // An item is worth (re)queuing when it isn't already downloaded or in flight:
+  // pending, or a previous failure/cancel to retry. Skipping completed/queued/
+  // downloading items keeps "Select all → Download" from enqueuing duplicates,
+  // since addFromUrl doesn't dedupe by URL.
+  const actionable = (it: MediaItem): boolean => {
+    const st = effStatus(it)
+    return st === 'pending' || st === 'error' || st === 'canceled'
+  }
+  const actionableItems = items.filter(actionable)
+  const selectedActionable = actionableItems.filter((it) => selected.has(it.id))
+  const allActionableSelected =
+    actionableItems.length > 0 && actionableItems.every((it) => selected.has(it.id))
+
   async function onIndex(): Promise<void> {
     setError(null)
     const u = url.trim()
@@ -297,6 +350,15 @@ export function LibraryView(): React.JSX.Element {
     })
   }
 
+  function toggleGroupExpand(title: string): void {
+    setExpandedGroups((prev) => {
+      const next = new Set(prev)
+      if (next.has(title)) next.delete(title)
+      else next.add(title)
+      return next
+    })
+  }
+
   function toggleGroup(groupItems: MediaItem[], on: boolean): void {
     setSelected((prev) => {
       const next = new Set(prev)
@@ -308,16 +370,34 @@ export function LibraryView(): React.JSX.Element {
     })
   }
 
+  // Select / clear every downloadable item across all groups in this source.
+  function toggleAll(on: boolean): void {
+    setSelected(on ? new Set(actionableItems.map((it) => it.id)) : new Set())
+  }
+
+  // One click queues every chosen item — maxConcurrent gates how many actually
+  // run, the rest wait in the queue. Selection clears since nothing is held back.
   function downloadSelected(): void {
-    if (!selectedSourceId) return
+    if (!selectedSourceId || selectedActionable.length === 0) return
-    const chosen = items.filter((it) => selected.has(it.id))
+    const n = enqueueItems(selectedSourceId, selectedActionable)
-    enqueueItems(selectedSourceId, chosen)
     setSelected(new Set())
+    setBatchNote(`Queued ${n} download${n === 1 ? '' : 's'}.`)
   }
 
   function downloadPending(): void {
+    if (!selectedSourceId || pendingItems.length === 0) return
+    const n = enqueueItems(selectedSourceId, pendingItems)
+    setBatchNote(`Queued ${n} download${n === 1 ? '' : 's'}.`)
+  }
+
+  // Queue every actionable (pending/failed/canceled) video in one playlist group,
+  // so "download this whole playlist" is a single click.
+  function downloadGroup(groupItems: MediaItem[]): void {
     if (!selectedSourceId) return
-    enqueueItems(selectedSourceId, pendingItems)
+    const toQueue = groupItems.filter(actionable)
+    if (toQueue.length === 0) return
+    const n = enqueueItems(selectedSourceId, toQueue)
+    setBatchNote(`Queued ${n} download${n === 1 ? '' : 's'}.`)
   }
 
   function pillClass(status: ItemStatus): string {
@@ -327,6 +407,83 @@ export function LibraryView(): React.JSX.Element {
     return styles.pill
   }
 
+  // One row of the item list — a playlist header or a video — shared by the
+  // inline (small source) and virtualized (large source) render paths.
+  function rowKey(row: LibRow): string {
+    return row.kind === 'header' ? `h:${row.title}` : row.item.id
+  }
+
+  function renderRow(row: LibRow): React.JSX.Element {
+    if (row.kind === 'header') {
+      const allOn = row.items.every((it) => selected.has(it.id))
+      const open = isGroupOpen(row.title)
+      const groupActionable = row.items.filter(actionable).length
+      return (
+        <div
+          className={styles.groupHead}
+          onClick={() => toggleGroupExpand(row.title)}
+          role="button"
+          tabIndex={0}
+          onKeyDown={(e) =>
+            (e.key === 'Enter' || e.key === ' ') && toggleGroupExpand(row.title)
+          }
+          aria-expanded={open}
+        >
+          {open ? <ChevronDownRegular /> : <ChevronRightRegular />}
+          <AppsListRegular />
+          <span className={styles.groupTitle}>{row.title}</span>
+          <Caption1 className={styles.srcSub}>{row.items.length}</Caption1>
+          <Button
+            size="small"
+            appearance="subtle"
+            onClick={(e) => {
+              e.stopPropagation()
+              toggleGroup(row.items, !allOn)
+            }}
+          >
+            {allOn ? 'None' : 'All'}
+          </Button>
+          <Button
+            size="small"
+            appearance="subtle"
+            icon={<ArrowDownloadRegular />}
+            disabled={groupActionable === 0}
+            onClick={(e) => {
+              e.stopPropagation()
+              downloadGroup(row.items)
+            }}
+          >
+            Download{groupActionable > 0 ? ` ${groupActionable}` : ''}
+          </Button>
+        </div>
+      )
+    }
+    const it = row.item
+    const status = effStatus(it)
+    return (
+      <div className={styles.row}>
+        <Checkbox
+          checked={selected.has(it.id)}
+          onChange={(_, d) => toggle(it.id, !!d.checked)}
+          aria-label={`Select ${it.title}`}
+        />
+        <MediaThumb
+          className={styles.rowThumb}
+          src={thumbUrl({ url: it.url, videoId: it.videoId })}
+          kind="video"
+          iconSize={16}
+        />
+        <div className={styles.rowMain}>
+          <span className={styles.rowTitle}>
+            {it.playlistIndex}. {it.title}
+          </span>
+          {it.durationLabel && <Caption1 className={styles.rowMeta}>{it.durationLabel}</Caption1>}
+        </div>
+        <span className={pillClass(status)}>{STATUS_LABEL[status]}</span>
+      </div>
+    )
+  }
+
   return (
     <div className={styles.root}>
       <div className={styles.header}>
@@ -418,6 +575,12 @@ export function LibraryView(): React.JSX.Element {
             >
               <div className={styles.detail}>
                 <div className={styles.actionRow}>
+                  <Checkbox
+                    checked={allActionableSelected ? true : selected.size > 0 ? 'mixed' : false}
+                    onChange={(_, d) => toggleAll(!!d.checked)}
+                    label="Select all"
+                    disabled={actionableItems.length === 0}
+                  />
                   <Caption1 className={styles.srcSub}>
                     {items.length} videos · {pendingItems.length} pending · indexed{' '}
                     {relTime(src.lastIndexedAt)}
@@ -433,8 +596,9 @@ export function LibraryView(): React.JSX.Element {
                         appearance="primary"
                         icon={<ArrowDownloadRegular />}
                         onClick={downloadSelected}
+                        disabled={selectedActionable.length === 0}
                       >
-                        Download {Math.min(selected.size, MAX_ENQUEUE_BATCH)} selected
+                        Download {selectedActionable.length} selected
                       </Button>
                     </>
                   ) : (
@@ -445,7 +609,7 @@ export function LibraryView(): React.JSX.Element {
                       onClick={downloadPending}
                       disabled={pendingItems.length === 0}
                     >
-                      Download {Math.min(pendingItems.length, MAX_ENQUEUE_BATCH)} pending
+                      Download {pendingItems.length} pending
                     </Button>
                   )}
                   <span className={styles.switchRow}>
@@ -475,54 +639,28 @@ export function LibraryView(): React.JSX.Element {
                   </Button>
                 </div>
 
-                {groups.map((g) => {
+                {batchNote && <Caption1 className={styles.srcSub}>{batchNote}</Caption1>}
-                  const allOn = g.items.every((it) => selected.has(it.id))
+
-                  return (
+                {flatRows.length > VIRTUALIZE_AT ? (
-                    <div key={g.title} className={styles.group}>
+                  // Big source: a fixed-height, internally-scrolling virtualized
-                      <div className={styles.groupHead}>
+                  // panel so 1000s of rows stay light. A definite height (not
-                        <AppsListRegular />
+                  // max-height) gives the virtualizer a viewport to measure.
-                        <span className={styles.groupTitle}>{g.title}</span>
+                  <VirtualList
-                        <Caption1 className={styles.srcSub}>{g.items.length}</Caption1>
+                    items={flatRows}
-                        <Button
+                    style={{ height: '58vh' }}
-                          size="small"
+                    overscan={10}
-                          appearance="subtle"
+                    estimateSize={(i) => (flatRows[i].kind === 'header' ? 40 : 46)}
-                          onClick={() => toggleGroup(g.items, !allOn)}
+                    getKey={(row) => rowKey(row)}
-                        >
+                    renderItem={(row) => renderRow(row)}
-                          {allOn ? 'None' : 'All'}
+                  />
-                        </Button>
+                ) : (
-                      </div>
+                  // Small source: render inline so the card grows naturally.
-                      <div className={styles.rows}>
+                  <div className={styles.plainList}>
-                        {g.items.map((it) => {
+                    {flatRows.map((row) => (
-                          const status = effStatus(it)
+                      <div key={rowKey(row)}>{renderRow(row)}</div>
-                          return (
+                    ))}
-                            <div key={it.id} className={styles.row}>
+                  </div>
-                              <Checkbox
+                )}
-                                checked={selected.has(it.id)}
-                                onChange={(_, d) => toggle(it.id, !!d.checked)}
-                                aria-label={`Select ${it.title}`}
-                              />
-                              <MediaThumb
-                                className={styles.rowThumb}
-                                src={thumbUrl({ url: it.url, videoId: it.videoId })}
-                                kind="video"
-                                iconSize={16}
-                              />
-                              <div className={styles.rowMain}>
-                                <span className={styles.rowTitle}>
-                                  {it.playlistIndex}. {it.title}
-                                </span>
-                                {it.durationLabel && (
-                                  <Caption1 className={styles.rowMeta}>{it.durationLabel}</Caption1>
-                                )}
-                              </div>
-                              <span className={pillClass(status)}>{STATUS_LABEL[status]}</span>
-                            </div>
-                          )
-                        })}
-                      </div>
-                    </div>
-                  )
-                })}
               </div>
             </SourceCard>
           ))}

src/renderer/src/components/QueueItem.tsx

@@ -1,3 +1,4 @@
+import { memo } from 'react'
 import {
   Text,
   Caption1,
@@ -15,6 +16,11 @@ import {
   OpenRegular,
   FolderRegular,
   ArrowClockwiseRegular,
+  ArrowDownloadRegular,
+  ArrowUpRegular,
+  BookmarkRegular,
+  PauseRegular,
+  PlayRegular,
   CheckmarkCircleFilled,
   ErrorCircleFilled,
   EyeOffRegular
@@ -90,6 +96,8 @@ const useStyles = makeStyles({
 const STATUS_BADGE: Record<DownloadStatus, { label: string; color: 'brand' | 'success' | 'danger' | 'warning' | 'subtle' }> = {
   queued: { label: 'Queued', color: 'subtle' },
   downloading: { label: 'Downloading', color: 'brand' },
+  paused: { label: 'Paused', color: 'warning' },
+  saved: { label: 'Saved', color: 'subtle' },
   completed: { label: 'Completed', color: 'success' },
   error: { label: 'Failed', color: 'danger' },
   canceled: { label: 'Canceled', color: 'warning' }
@@ -99,9 +107,26 @@ function pct(progress: number): string {
   return `${Math.round(progress * 100)}%`
 }
 
-export function QueueItem({ item }: { item: DownloadItem }): React.JSX.Element {
+function fmtSchedule(ms: number): string {
+  try {
+    return new Date(ms).toLocaleString([], { dateStyle: 'medium', timeStyle: 'short' })
+  } catch {
+    return ''
+  }
+}
+
+export const QueueItem = memo(function QueueItem({
+  item
+}: {
+  item: DownloadItem
+}): React.JSX.Element {
   const styles = useStyles()
   const cancel = useDownloads((s) => s.cancel)
+  const pause = useDownloads((s) => s.pause)
+  const resume = useDownloads((s) => s.resume)
+  const prioritize = useDownloads((s) => s.prioritize)
+  const saveForLater = useDownloads((s) => s.saveForLater)
+  const queueNow = useDownloads((s) => s.queueNow)
   const remove = useDownloads((s) => s.remove)
   const retry = useDownloads((s) => s.retry)
   const openFile = useDownloads((s) => s.openFile)
@@ -172,12 +197,79 @@ export function QueueItem({ item }: { item: DownloadItem }): React.JSX.Element {
           </div>
         )}
 
+        {item.status === 'paused' && (
+          <div className={styles.progressRow}>
+            <ProgressBar className={styles.progressBar} value={item.progress} thickness="large" />
+            <Caption1 className={styles.stats}>Paused • {pct(item.progress)}</Caption1>
+          </div>
+        )}
+
+        {item.status === 'saved' && (
+          <Caption1 className={styles.stats}>
+            {item.scheduledFor ? `Scheduled for ${fmtSchedule(item.scheduledFor)}` : 'Saved for later'}
+          </Caption1>
+        )}
+
         {item.status === 'error' && item.error && (
           <Caption1 className={styles.error}>{item.error}</Caption1>
         )}
       </div>
 
       <div className={styles.actions}>
+        {item.status === 'downloading' && (
+          <Hint label="Pause" placement="top" align="end">
+            <Button
+              appearance="subtle"
+              icon={<PauseRegular />}
+              onClick={() => pause(item.id)}
+              aria-label="Pause"
+            />
+          </Hint>
+        )}
+
+        {item.status === 'queued' && (
+          <>
+            <Hint label="Download next" placement="top" align="end">
+              <Button
+                appearance="subtle"
+                icon={<ArrowUpRegular />}
+                onClick={() => prioritize(item.id)}
+                aria-label="Download next"
+              />
+            </Hint>
+            <Hint label="Save for later" placement="top" align="end">
+              <Button
+                appearance="subtle"
+                icon={<BookmarkRegular />}
+                onClick={() => saveForLater(item.id)}
+                aria-label="Save for later"
+              />
+            </Hint>
+          </>
+        )}
+
+        {item.status === 'paused' && (
+          <Hint label="Resume" placement="top" align="end">
+            <Button
+              appearance="subtle"
+              icon={<PlayRegular />}
+              onClick={() => resume(item.id)}
+              aria-label="Resume"
+            />
+          </Hint>
+        )}
+
+        {item.status === 'saved' && (
+          <Hint label="Add to queue" placement="top" align="end">
+            <Button
+              appearance="subtle"
+              icon={<ArrowDownloadRegular />}
+              onClick={() => queueNow(item.id)}
+              aria-label="Add to queue"
+            />
+          </Hint>
+        )}
+
         {active && (
           <Hint label="Cancel" placement="top" align="end">
             <Button
@@ -234,4 +326,4 @@ export function QueueItem({ item }: { item: DownloadItem }): React.JSX.Element {
       </div>
     </div>
   )
-}
+})

src/renderer/src/components/SettingsView.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react'
+import { useEffect, useRef, useState } from 'react'
 import {
   Field,
   Input,
@@ -34,13 +34,15 @@ import {
   PaintBucketRegular,
   AccessibilityRegular,
   ArrowSyncRegular,
-  OpenRegular
+  OpenRegular,
+  SearchRegular
 } from '@fluentui/react-icons'
 import {
   COOKIE_BROWSERS,
   type YtdlpVersionResult,
   type YtdlpUpdateChannel,
   type YtdlpUpdateResult,
+  type FfmpegVersionResult,
   type AppUpdateInfo,
   type MediaKind,
   type CookieSource,
@@ -185,6 +187,28 @@ const UPDATE_CHANNEL_OPTIONS = [
 export function SettingsView(): React.JSX.Element {
   const styles = useStyles()
 
+  // Settings search (Phase O). Rather than thread a query through all ~11 cards,
+  // filter by toggling each card's `display` based on whether its text matches.
+  // The cards are the root's direct children; the search box (marked
+  // data-settings-search) is skipped. React never sets `style` on the cards, so
+  // our inline display survives their re-renders.
+  const [search, setSearch] = useState('')
+  const [noResults, setNoResults] = useState(false)
+  const rootRef = useRef<HTMLDivElement>(null)
+  useEffect(() => {
+    const root = rootRef.current
+    if (!root) return
+    const q = search.trim().toLowerCase()
+    let shown = 0
+    for (const el of Array.from(root.children) as HTMLElement[]) {
+      if (el.dataset.settingsSearch !== undefined) continue
+      const match = !q || (el.textContent ?? '').toLowerCase().includes(q)
+      el.style.display = match ? '' : 'none'
+      if (match) shown++
+    }
+    setNoResults(q !== '' && shown === 0)
+  }, [search])
+
   const videoDir = useSettings((s) => s.videoDir)
   const audioDir = useSettings((s) => s.audioDir)
   const chooseDir = useSettings((s) => s.chooseDir)
@@ -202,6 +226,8 @@ export function SettingsView(): React.JSX.Element {
   const proxy = useSettings((s) => s.proxy)
   const rateLimit = useSettings((s) => s.rateLimit)
   const useAria2c = useSettings((s) => s.useAria2c)
+  const youtubePlayerClient = useSettings((s) => s.youtubePlayerClient)
+  const youtubePoToken = useSettings((s) => s.youtubePoToken)
   const cookieSource = useSettings((s) => s.cookieSource)
   const cookiesBrowser = useSettings((s) => s.cookiesBrowser)
   const restrictFilenames = useSettings((s) => s.restrictFilenames)
@@ -209,6 +235,10 @@ export function SettingsView(): React.JSX.Element {
   const customCommandEnabled = useSettings((s) => s.customCommandEnabled)
   const defaultTemplateId = useSettings((s) => s.defaultTemplateId)
   const notifyOnComplete = useSettings((s) => s.notifyOnComplete)
+  const minimizeToTray = useSettings((s) => s.minimizeToTray)
+  const autoUpdateYtdlp = useSettings((s) => s.autoUpdateYtdlp)
+  const ytdlpChannel = useSettings((s) => s.ytdlpChannel)
+  const ytdlpLastUpdateCheck = useSettings((s) => s.ytdlpLastUpdateCheck)
   const update = useSettings((s) => s.update)
   const templates = useTemplates((s) => s.templates)
   const errorEntries = useErrorLog((s) => s.entries)
@@ -219,8 +249,8 @@ export function SettingsView(): React.JSX.Element {
 
   const [checking, setChecking] = useState(false)
   const [version, setVersion] = useState<YtdlpVersionResult | null>(null)
+  const [ffmpeg, setFfmpeg] = useState<FfmpegVersionResult | null>(null)
 
-  const [updateChannel, setUpdateChannel] = useState<YtdlpUpdateChannel>('stable')
   const [updating, setUpdating] = useState(false)
   const [updateResult, setUpdateResult] = useState<YtdlpUpdateResult | null>(null)
 
@@ -251,6 +281,28 @@ export function SettingsView(): React.JSX.Element {
     return window.api.onAppUpdateProgress((p) => setAppFraction(p.fraction))
   }, [])
 
+  useEffect(() => {
+    // Show the current yt-dlp version without a manual click, and reflect a
+    // background auto-update (which may run on launch) live in this panel.
+    window.api.getYtdlpVersion().then(setVersion).catch(() => {})
+    // ffmpeg/ffprobe are display-only (bundled, not auto-updated); load them once.
+    window.api.getFfmpegVersions().then(setFfmpeg).catch(() => {})
+    return window.api.onYtdlpAutoUpdateStatus((s) => {
+      if (s.phase === 'checking') {
+        setChecking(true)
+        return
+      }
+      setChecking(false)
+      if (s.version) setVersion({ ok: true, version: s.version })
+      if (s.checkedAt) useSettings.setState({ ytdlpLastUpdateCheck: s.checkedAt })
+      if (s.phase === 'updated') {
+        setUpdateResult({ ok: true, output: `Updated to yt-dlp ${s.version ?? ''}`.trim() })
+      } else if (s.phase === 'error' && s.error) {
+        setUpdateResult({ ok: false, error: s.error })
+      }
+    })
+  }, [])
+
   async function checkAppUpdate(): Promise<void> {
     setAppChecking(true)
     setAppUpd(null)
@@ -378,7 +430,7 @@ export function SettingsView(): React.JSX.Element {
     setUpdating(true)
     setUpdateResult(null)
     try {
-      const result = await window.api.updateYtdlp(updateChannel)
+      const result = await window.api.updateYtdlp(ytdlpChannel)
       setUpdateResult(result)
       if (result.ok) setVersion(null) // stale — prompt a re-check rather than show a wrong version
     } catch (e) {
@@ -389,7 +441,22 @@ export function SettingsView(): React.JSX.Element {
   }
 
   return (
-    <div className={styles.root}>
+    <div className={styles.root} ref={rootRef}>
+      <div data-settings-search>
+        <Input
+          value={search}
+          onChange={(_, d) => setSearch(d.value)}
+          placeholder="Search settings…"
+          contentBefore={<SearchRegular />}
+          style={{ width: '100%' }}
+        />
+        {noResults && (
+          <Caption1 style={{ color: tokens.colorNeutralForeground3, marginTop: '8px' }}>
+            No settings match “{search}”.
+          </Caption1>
+        )}
+      </div>
+
       <Card className={styles.card}>
         <div className={styles.sectionHeader}>
           <ArrowDownloadRegular className={styles.sectionIcon} />
@@ -491,6 +558,17 @@ export function SettingsView(): React.JSX.Element {
             label={notifyOnComplete ? 'On' : 'Off'}
           />
         </Field>
+
+        <Field
+          label="Keep running in the tray"
+          hint="When on, closing the window minimizes AeroFetch to the system tray instead of quitting. Use the tray icon to reopen or quit."
+        >
+          <Switch
+            checked={minimizeToTray}
+            onChange={(_, d) => update({ minimizeToTray: d.checked })}
+            label={minimizeToTray ? 'On' : 'Off'}
+          />
+        </Field>
       </Card>
 
       <Card className={styles.card}>
@@ -599,6 +677,28 @@ export function SettingsView(): React.JSX.Element {
             label={useAria2c ? 'On' : 'Off'}
           />
         </Field>
+
+        <Field
+          label="YouTube client (advanced)"
+          hint="Override the YouTube extraction client when downloads start failing the bot check. Try web_safari, tv, or mweb. Leave blank for yt-dlp's default."
+        >
+          <Input
+            value={youtubePlayerClient}
+            placeholder="web_safari"
+            onChange={(_, d) => update({ youtubePlayerClient: d.value })}
+          />
+        </Field>
+
+        <Field
+          label="YouTube PO token (advanced)"
+          hint="A manually-obtained Proof-of-Origin token for YouTube's bot check, sent via --extractor-args. Usually cookies (above) are the easier fix; automatic minting is planned."
+        >
+          <Input
+            value={youtubePoToken}
+            placeholder="(none)"
+            onChange={(_, d) => update({ youtubePoToken: d.value })}
+          />
+        </Field>
       </Card>
 
       <Card className={styles.card}>
@@ -900,14 +1000,21 @@ export function SettingsView(): React.JSX.Element {
           <Subtitle2>About</Subtitle2>
         </div>
         <Caption1 className={styles.hint}>
-          AeroFetch is a generic frontend for yt-dlp. It bundles yt-dlp and ffmpeg.
+          AeroFetch is a generic frontend for yt-dlp. It bundles ffmpeg and manages its
+          own copy of yt-dlp, keeping it up to date automatically.
         </Caption1>
-        <div className={styles.folderRow}>
+
-          <Button onClick={checkVersion} disabled={checking}>
+        <Field
-            Check yt-dlp version
+          label="Keep yt-dlp updated automatically"
-          </Button>
+          hint="Checks once a day on launch and updates yt-dlp in the background, so YouTube changes don't start breaking downloads with 403 errors."
-          {checking && <Spinner size="tiny" />}
+        >
-        </div>
+          <Switch
+            checked={autoUpdateYtdlp}
+            onChange={(_, d) => update({ autoUpdateYtdlp: d.checked })}
+            label={autoUpdateYtdlp ? 'On' : 'Off'}
+          />
+        </Field>
+
         {version?.ok && (
           <Text style={{ fontFamily: tokens.fontFamilyMonospace }}>yt-dlp {version.version}</Text>
         )}
@@ -916,13 +1023,37 @@ export function SettingsView(): React.JSX.Element {
             {version.error}
           </Caption1>
         )}
+        {ffmpeg && (
+          <>
+            <Text style={{ fontFamily: tokens.fontFamilyMonospace }}>
+              ffmpeg {ffmpeg.ffmpeg ?? 'not found'}
+            </Text>
+            <Text style={{ fontFamily: tokens.fontFamilyMonospace }}>
+              ffprobe {ffmpeg.ffprobe ?? 'not found'}
+            </Text>
+          </>
+        )}
+        {ytdlpLastUpdateCheck > 0 && (
+          <Caption1 className={styles.hint}>
+            Last checked for updates {new Date(ytdlpLastUpdateCheck).toLocaleString()}.
+          </Caption1>
+        )}
+        <div className={styles.folderRow}>
+          <Button onClick={checkVersion} disabled={checking}>
+            Check yt-dlp version
+          </Button>
+          {checking && <Spinner size="tiny" />}
+        </div>
 
-        <Field label="Update channel" hint="Nightly tracks yt-dlp's daily build; stable is the tagged release.">
+        <Field
+          label="Update channel"
+          hint="Nightly tracks yt-dlp's daily build; stable is the tagged release. Nightly follows YouTube changes fastest."
+        >
           <Select
             aria-label="Update channel"
-            value={updateChannel}
+            value={ytdlpChannel}
             options={UPDATE_CHANNEL_OPTIONS}
-            onChange={(v) => setUpdateChannel(v as YtdlpUpdateChannel)}
+            onChange={(v) => update({ ytdlpChannel: v as YtdlpUpdateChannel })}
           />
         </Field>
         <div className={styles.folderRow}>

src/renderer/src/components/Sidebar.tsx

@@ -4,6 +4,7 @@ import {
   ArrowDownloadRegular,
   HistoryRegular,
   LibraryRegular,
+  WindowConsoleRegular,
   SettingsRegular,
   WeatherMoonRegular,
   WeatherSunnyRegular,
@@ -14,7 +15,7 @@ import {
 import type { ThemeMode } from '@shared/ipc'
 import { Hint } from './Hint'
 
-export type TabValue = 'downloads' | 'library' | 'history' | 'settings'
+export type TabValue = 'downloads' | 'library' | 'history' | 'terminal' | 'settings'
 
 const useStyles = makeStyles({
   root: {
@@ -179,6 +180,7 @@ const NAV: { value: TabValue; label: string; icon: React.JSX.Element }[] = [
   { value: 'downloads', label: 'Downloads', icon: <ArrowDownloadRegular /> },
   { value: 'library', label: 'Library', icon: <LibraryRegular /> },
   { value: 'history', label: 'History', icon: <HistoryRegular /> },
+  { value: 'terminal', label: 'Terminal', icon: <WindowConsoleRegular /> },
   { value: 'settings', label: 'Settings', icon: <SettingsRegular /> }
 ]
 

src/renderer/src/components/TemplateManager.tsx

@@ -74,8 +74,10 @@ interface Draft {
   id: string | null
   name: string
   args: string
+  /** optional regex; auto-applies the template to matching URLs */
+  urlPattern: string
 }
-const BLANK_DRAFT: Draft = { id: null, name: '', args: '' }
+const BLANK_DRAFT: Draft = { id: null, name: '', args: '', urlPattern: '' }
 
 function newId(): string {
   return typeof crypto !== 'undefined' && crypto.randomUUID ? crypto.randomUUID() : `tpl-${Date.now()}`
@@ -95,14 +97,20 @@ export function TemplateManager(): React.JSX.Element {
   const [draft, setDraft] = useState<Draft | null>(null)
 
   function startEdit(t: CommandTemplate): void {
-    setDraft({ id: t.id, name: t.name, args: t.args })
+    setDraft({ id: t.id, name: t.name, args: t.args, urlPattern: t.urlPattern ?? '' })
   }
 
   function commit(): void {
     if (!draft) return
     const name = draft.name.trim()
     if (!name) return
-    save({ id: draft.id ?? newId(), name, args: draft.args.trim() })
+    const urlPattern = draft.urlPattern.trim()
+    save({
+      id: draft.id ?? newId(),
+      name,
+      args: draft.args.trim(),
+      ...(urlPattern ? { urlPattern } : {})
+    })
     setDraft(null)
   }
 
@@ -154,6 +162,11 @@ export function TemplateManager(): React.JSX.Element {
             resize="vertical"
             onChange={(_, d) => setDraft({ ...draft, args: d.value })}
           />
+          <Input
+            value={draft.urlPattern}
+            placeholder="Auto-apply to URLs matching (regex, optional) — e.g. soundcloud\.com"
+            onChange={(_, d) => setDraft({ ...draft, urlPattern: d.value })}
+          />
           <div className={styles.formActions}>
             <Button appearance="subtle" icon={<DismissRegular />} onClick={() => setDraft(null)}>
               Cancel

src/renderer/src/components/TerminalView.tsx

@@ -0,0 +1,203 @@
+import { useEffect, useRef, useState } from 'react'
+import {
+  Button,
+  Textarea,
+  Subtitle2,
+  Body1,
+  Caption1,
+  makeStyles,
+  tokens,
+  shorthands
+} from '@fluentui/react-components'
+import { PlayRegular, DismissRegular, DeleteRegular } from '@fluentui/react-icons'
+import { useSettings } from '../store/settings'
+
+type LineKind = 'stdout' | 'stderr' | 'cmd' | 'sys'
+interface Line {
+  text: string
+  kind: LineKind
+}
+
+const useStyles = makeStyles({
+  root: { display: 'flex', flexDirection: 'column', gap: '16px', height: '100%' },
+  header: { display: 'flex', flexDirection: 'column', gap: '2px' },
+  sub: { color: tokens.colorNeutralForeground3 },
+  gate: {
+    padding: '12px 14px',
+    backgroundColor: tokens.colorStatusWarningBackground1,
+    color: tokens.colorStatusWarningForeground1,
+    ...shorthands.borderRadius(tokens.borderRadiusLarge)
+  },
+  inputRow: { display: 'flex', gap: '8px', alignItems: 'flex-end' },
+  inputCol: { flexGrow: 1, display: 'flex', flexDirection: 'column', gap: '4px' },
+  prefix: { color: tokens.colorNeutralForeground3, fontFamily: tokens.fontFamilyMonospace },
+  buttons: { display: 'flex', gap: '8px' },
+  log: {
+    flexGrow: 1,
+    minHeight: '160px',
+    overflowY: 'auto',
+    margin: 0,
+    padding: '12px 14px',
+    backgroundColor: tokens.colorNeutralBackground1,
+    color: tokens.colorNeutralForeground1,
+    ...shorthands.borderRadius(tokens.borderRadiusLarge),
+    border: `1px solid ${tokens.colorNeutralStroke2}`,
+    fontFamily: tokens.fontFamilyMonospace,
+    fontSize: tokens.fontSizeBase200,
+    lineHeight: tokens.lineHeightBase300,
+    whiteSpace: 'pre-wrap',
+    wordBreak: 'break-word'
+  },
+  cmd: { color: tokens.colorBrandForeground1, fontWeight: tokens.fontWeightSemibold },
+  stderr: { color: tokens.colorPaletteRedForeground1 },
+  sys: { color: tokens.colorNeutralForeground3 },
+  empty: { color: tokens.colorNeutralForeground3 }
+})
+
+function newId(): string {
+  return typeof crypto !== 'undefined' && crypto.randomUUID ? crypto.randomUUID() : `t-${Date.now()}`
+}
+
+/**
+ * Built-in yt-dlp terminal (Phase N): type raw yt-dlp args, run the bundled
+ * binary, and watch its output stream. Gated on the customCommandEnabled consent
+ * flag (enforced again in main — see src/main/terminal.ts).
+ */
+export function TerminalView(): React.JSX.Element {
+  const styles = useStyles()
+  const customCommandEnabled = useSettings((s) => s.customCommandEnabled)
+
+  const [args, setArgs] = useState('')
+  const [lines, setLines] = useState<Line[]>([])
+  const [running, setRunning] = useState(false)
+  const runId = useRef<string | null>(null)
+  const logRef = useRef<HTMLPreElement>(null)
+
+  // Stream terminal output for the current run into the log.
+  useEffect(
+    () =>
+      window.api.onTerminalOutput((ev) => {
+        if (ev.id !== runId.current) return
+        if (ev.type === 'output') {
+          setLines((ls) => [...ls, { text: ev.line, kind: ev.stream }])
+        } else if (ev.type === 'error') {
+          setLines((ls) => [...ls, { text: ev.error, kind: 'stderr' }])
+          setRunning(false)
+          runId.current = null
+        } else {
+          setLines((ls) => [...ls, { text: `— exited (code ${ev.code ?? '?'})`, kind: 'sys' }])
+          setRunning(false)
+          runId.current = null
+        }
+      }),
+    []
+  )
+
+  // Keep the log pinned to the latest output.
+  useEffect(() => {
+    if (logRef.current) logRef.current.scrollTop = logRef.current.scrollHeight
+  }, [lines])
+
+  function run(): void {
+    const a = args.trim()
+    if (!a || running) return
+    const id = newId()
+    runId.current = id
+    setLines((ls) => [...ls, { text: `> yt-dlp ${a}`, kind: 'cmd' }])
+    setRunning(true)
+    window.api
+      .runTerminal(id, a)
+      .then((res) => {
+        if (!res.ok) {
+          setLines((ls) => [...ls, { text: res.error ?? 'Failed to start.', kind: 'stderr' }])
+          setRunning(false)
+          runId.current = null
+        }
+      })
+      .catch((e: unknown) => {
+        setLines((ls) => [...ls, { text: String(e), kind: 'stderr' }])
+        setRunning(false)
+        runId.current = null
+      })
+  }
+
+  function stop(): void {
+    if (runId.current) window.api.cancelTerminal(runId.current)
+  }
+
+  const lineClass = (kind: LineKind): string | undefined =>
+    kind === 'cmd' ? styles.cmd : kind === 'stderr' ? styles.stderr : kind === 'sys' ? styles.sys : undefined
+
+  return (
+    <div className={styles.root}>
+      <div className={styles.header}>
+        <Subtitle2>Terminal</Subtitle2>
+        <Caption1 className={styles.sub}>
+          Run the bundled yt-dlp with your own arguments. The URL goes in the args too, e.g.{' '}
+          <code>-F https://youtu.be/…</code>. ffmpeg is wired up automatically.
+        </Caption1>
+      </div>
+
+      {!customCommandEnabled && (
+        <Body1 className={styles.gate}>
+          The terminal is part of custom commands. Turn on “Run custom commands” in Settings →
+          Custom commands to use it.
+        </Body1>
+      )}
+
+      <div className={styles.inputRow}>
+        <div className={styles.inputCol}>
+          <Caption1 className={styles.prefix}>yt-dlp</Caption1>
+          <Textarea
+            value={args}
+            onChange={(_, d) => setArgs(d.value)}
+            onKeyDown={(e) => {
+              if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
+                e.preventDefault()
+                run()
+              }
+            }}
+            placeholder="--version    (Ctrl+Enter to run)"
+            resize="vertical"
+            disabled={!customCommandEnabled}
+          />
+        </div>
+        <div className={styles.buttons}>
+          {running ? (
+            <Button appearance="secondary" icon={<DismissRegular />} onClick={stop}>
+              Stop
+            </Button>
+          ) : (
+            <Button
+              appearance="primary"
+              icon={<PlayRegular />}
+              onClick={run}
+              disabled={!customCommandEnabled || !args.trim()}
+            >
+              Run
+            </Button>
+          )}
+          <Button
+            appearance="subtle"
+            icon={<DeleteRegular />}
+            onClick={() => setLines([])}
+            disabled={lines.length === 0}
+            aria-label="Clear output"
+          />
+        </div>
+      </div>
+
+      <pre className={styles.log} ref={logRef}>
+        {lines.length === 0 ? (
+          <span className={styles.empty}>Output will appear here.</span>
+        ) : (
+          lines.map((l, i) => (
+            <div key={i} className={lineClass(l.kind)}>
+              {l.text}
+            </div>
+          ))
+        )}
+      </pre>
+    </div>
+  )
+}

src/renderer/src/components/VirtualList.tsx

@@ -0,0 +1,70 @@
+import { useRef, type CSSProperties, type ReactNode } from 'react'
+import { useVirtualizer } from '@tanstack/react-virtual'
+
+/**
+ * Windowed list: renders only the rows near the viewport, so a list thousands of
+ * items long stays light — one DOM subtree per visible row, not per item. This
+ * keeps the Downloads queue and a big channel's Library list responsive when a
+ * source has 1000s of videos.
+ *
+ * It owns its own scroll container, so size that container via `style`/`className`
+ * (e.g. `flex: 1` + `minHeight: 0`, or a `maxHeight`). Owning the scroller means
+ * the virtualizer anchors at scroll offset 0 and never has to track where the
+ * list sits within the page — robust even though the app shares one outer
+ * scroll area with content above each list.
+ *
+ * Row heights are measured (measureElement), so variable-height rows are fine;
+ * `estimateSize` only needs to be a rough first guess before measurement.
+ */
+export function VirtualList<T>({
+  items,
+  estimateSize,
+  getKey,
+  renderItem,
+  overscan = 8,
+  gap = 0,
+  className,
+  style
+}: {
+  items: T[]
+  estimateSize: (index: number) => number
+  getKey: (item: T, index: number) => string
+  renderItem: (item: T, index: number) => ReactNode
+  overscan?: number
+  gap?: number
+  className?: string
+  style?: CSSProperties
+}): React.JSX.Element {
+  const scrollRef = useRef<HTMLDivElement>(null)
+  const virtualizer = useVirtualizer({
+    count: items.length,
+    getScrollElement: () => scrollRef.current,
+    estimateSize,
+    overscan,
+    gap,
+    getItemKey: (index) => getKey(items[index], index)
+  })
+
+  return (
+    <div ref={scrollRef} className={className} style={{ overflowY: 'auto', ...style }}>
+      <div style={{ height: virtualizer.getTotalSize(), position: 'relative', width: '100%' }}>
+        {virtualizer.getVirtualItems().map((vrow) => (
+          <div
+            key={vrow.key}
+            data-index={vrow.index}
+            ref={virtualizer.measureElement}
+            style={{
+              position: 'absolute',
+              top: 0,
+              left: 0,
+              width: '100%',
+              transform: `translateY(${vrow.start}px)`
+            }}
+          >
+            {renderItem(items[vrow.index], vrow.index)}
+          </div>
+        ))}
+      </div>
+    </div>
+  )
+}

src/renderer/src/main.tsx

@@ -27,13 +27,19 @@ if (import.meta.env.DEV && !window.api) {
     useAria2c: false,
     cookieSource: 'none',
     cookiesBrowser: 'chrome',
+    youtubePlayerClient: '',
+    youtubePoToken: '',
     restrictFilenames: false,
     downloadArchive: false,
+    autoUpdateYtdlp: true,
+    ytdlpChannel: 'nightly',
+    ytdlpLastUpdateCheck: Date.now() - 3_600_000,
     customCommandEnabled: false,
     defaultTemplateId: null,
     notifyOnComplete: true,
     autoDownloadNew: true,
-    hasCompletedOnboarding: true
+    hasCompletedOnboarding: true,
+    minimizeToTray: false
   }
   // Stands in for the cookies.txt file's mtime — lets the Cookies card's
   // sign-in/clear flow be exercised in this browser-only preview.
@@ -67,6 +73,7 @@ if (import.meta.env.DEV && !window.api) {
     runAppUpdate: async () => ({ ok: true }),
     onAppUpdateProgress: () => () => {},
     getYtdlpVersion: async () => ({ ok: true, version: '2025.06.01 (UI preview mock)' }),
+    getFfmpegVersions: async () => ({ ffmpeg: '7.1-full_build (UI preview mock)', ffprobe: '7.1-full_build (UI preview mock)' }),
     probe: async (url: string) => {
       await new Promise((r) => setTimeout(r, 700)) // simulate network latency
       // A 'list'/'playlist' URL exercises the playlist selection UI in preview.
@@ -109,6 +116,7 @@ if (import.meta.env.DEV && !window.api) {
     },
     startDownload: async () => ({ ok: true }),
     cancelDownload: async () => {},
+    pauseDownload: async () => {},
     getDefaultFolder: async () => 'C:\\Users\\you\\Downloads',
     chooseFolder: async () => null,
     openPath: async () => '',
@@ -154,6 +162,8 @@ if (import.meta.env.DEV && !window.api) {
       await new Promise((r) => setTimeout(r, 600)) // simulate the self-update run
       return { ok: true, output: `yt-dlp is already up to date (channel: ${channel}, UI preview mock)` }
     },
+    // No background updater in the browser preview — hand back an inert unsubscribe.
+    onYtdlpAutoUpdateStatus: () => () => {},
     listErrorLog: async () => [],
     clearErrorLog: async () => [],
     exportBackup: async () => ({ ok: true, path: 'C:\\Users\\you\\Downloads\\aerofetch-backup.json' }),
@@ -213,7 +223,11 @@ if (import.meta.env.DEV && !window.api) {
         durationLabel: `${10 + i}:0${i}`,
         downloaded: i < 2
       })),
-    onIndexProgress: () => () => {}
+    onIndexProgress: () => () => {},
+    runTerminal: async () => ({ ok: true }),
+    cancelTerminal: async () => {},
+    onTerminalOutput: () => () => {},
+    setTaskbarProgress: () => {}
   }
 }
 

src/renderer/src/store/downloads.ts

@@ -6,7 +6,14 @@ import { useSources } from './sources'
 
 export type MediaKind = 'video' | 'audio'
 
-export type DownloadStatus = 'queued' | 'downloading' | 'completed' | 'error' | 'canceled'
+export type DownloadStatus =
+  | 'queued'
+  | 'downloading'
+  | 'paused'
+  | 'saved'
+  | 'completed'
+  | 'error'
+  | 'canceled'
 
 /** An exact probed format chosen for a download (omitted for the preset path). */
 export interface ChosenFormat {
@@ -39,6 +46,10 @@ export interface DownloadItem {
   options?: DownloadOptions
   /** per-download custom-command override (omitted = use the persisted default template) */
   extraArgs?: string
+  /** raw trim spec — time ranges to keep (parsed to --download-sections in main) */
+  trim?: string
+  /** epoch ms to auto-start a 'saved' item; undefined = parked indefinitely (Phase M) */
+  scheduledFor?: number
   /** private download — completion is never recorded to history */
   incognito?: boolean
   /** metadata already fetched at probe time; forwarded to main so it skips a redundant probe */
@@ -54,30 +65,59 @@ export const QUALITY_OPTIONS: Record<MediaKind, string[]> = {
   audio: ['Best (MP3)', '320 kbps', '192 kbps', '128 kbps']
 }
 
+/** Options accepted when enqueuing a URL (shared by addFromUrl + addMany). */
+export interface AddOptions {
+  format?: ChosenFormat
+  title?: string
+  channel?: string
+  durationLabel?: string
+  thumbnail?: string
+  options?: DownloadOptions
+  extraArgs?: string
+  trim?: string
+  /** when set and in the future, the item starts 'saved' and auto-queues at this time */
+  scheduledFor?: number
+  incognito?: boolean
+  collection?: CollectionContext
+  mediaItemId?: string
+}
+
+/** One URL to enqueue in a single addMany batch. */
+export interface AddEntry {
+  url: string
+  kind: MediaKind
+  quality: string
+  opts?: AddOptions
+}
+
 // True when running in the standalone browser preview (no Electron preload).
 // The real preload injects window.electron; the browser stub does not.
 const PREVIEW = typeof window === 'undefined' || !window.electron
 
 interface DownloadState {
   items: DownloadItem[]
-  addFromUrl: (
+  addFromUrl: (url: string, kind: MediaKind, quality: string, opts?: AddOptions) => void
-    url: string,
+  /**
-    kind: MediaKind,
+   * Enqueue many URLs at once with a single state update and a single pump, so
-    quality: string,
+   * queuing an entire channel (1000s of items) doesn't churn the store O(n²) the
-    opts?: {
+   * way looping addFromUrl would.
-      format?: ChosenFormat
+   */
-      title?: string
+  addMany: (entries: AddEntry[]) => void
-      channel?: string
-      durationLabel?: string
-      thumbnail?: string
-      options?: DownloadOptions
-      extraArgs?: string
-      incognito?: boolean
-      collection?: CollectionContext
-      mediaItemId?: string
-    }
-  ) => void
   retry: (id: string) => void
+  /** re-queue every failed item at once (Phase M) */
+  retryAll: () => void
+  /** stop a running download but keep its partial file for a later resume (Phase M) */
+  pause: (id: string) => void
+  /** re-queue a paused download; yt-dlp continues its partial file on relaunch */
+  resume: (id: string) => void
+  /** move a queued item to the front of the promotion order ("download next", Phase M) */
+  prioritize: (id: string) => void
+  /** park a queued item indefinitely as 'saved' (Phase M) */
+  saveForLater: (id: string) => void
+  /** un-park a 'saved' item back into the queue now (clears any schedule) */
+  queueNow: (id: string) => void
+  /** internal: promote any 'saved' item whose scheduledFor time has arrived */
+  promoteDueScheduled: () => void
   cancel: (id: string) => void
   remove: (id: string) => void
   clearFinished: () => void
@@ -95,6 +135,44 @@ function newId(): string {
   return `item-${++idCounter}`
 }
 
+/**
+ * Build a fresh queued DownloadItem from a URL + options. Pure (no store access)
+ * so addFromUrl and addMany share it. If the caller already probed the URL, its
+ * metadata is carried as probedMeta so main can skip a redundant probe (audit P2).
+ */
+function buildItem(url: string, kind: MediaKind, quality: string, opts?: AddOptions): DownloadItem {
+  const probedMeta: DownloadMeta | undefined =
+    opts?.title || opts?.channel || opts?.durationLabel
+      ? { title: opts?.title, channel: opts?.channel, durationLabel: opts?.durationLabel }
+      : undefined
+  // A future scheduled time parks the item as 'saved' until its moment arrives;
+  // a past/absent time starts it queued as usual.
+  const scheduledFor =
+    opts?.scheduledFor && opts.scheduledFor > Date.now() ? opts.scheduledFor : undefined
+  return {
+    id: newId(),
+    url,
+    title: opts?.title ?? titleFromUrl(url),
+    channel: opts?.channel ?? 'Resolving…',
+    durationLabel: opts?.durationLabel,
+    thumbnail: opts?.thumbnail,
+    kind,
+    quality,
+    status: scheduledFor ? 'saved' : 'queued',
+    progress: 0,
+    formatId: opts?.format?.id,
+    formatHasAudio: opts?.format?.hasAudio,
+    options: opts?.options,
+    extraArgs: opts?.extraArgs,
+    trim: opts?.trim,
+    scheduledFor,
+    incognito: opts?.incognito,
+    collection: opts?.collection,
+    mediaItemId: opts?.mediaItemId,
+    probedMeta
+  }
+}
+
 function titleFromUrl(url: string): string {
   try {
     const u = new URL(url)
@@ -253,6 +331,7 @@ export const useDownloads = create<DownloadState>((set, get) => {
         formatHasAudio: item.formatHasAudio,
         options: item.options,
         extraArgs: item.extraArgs,
+        trim: item.trim,
         meta: item.probedMeta,
         collection: item.collection
       })
@@ -291,35 +370,14 @@ export const useDownloads = create<DownloadState>((set, get) => {
     pump,
 
     addFromUrl: (url, kind, quality, opts) => {
-      const id = newId()
+      set((s) => ({ items: [buildItem(url, kind, quality, opts), ...s.items] }))
-      // If the caller already probed the URL, carry that metadata so main can skip
+      pump()
-      // its own redundant probe (audit P2). Only set it when something real was
+    },
-      // provided — a bare paste with no probe leaves it undefined.
+
-      const probedMeta: DownloadMeta | undefined =
+    addMany: (entries) => {
-        opts?.title || opts?.channel || opts?.durationLabel
+      if (entries.length === 0) return
-          ? { title: opts?.title, channel: opts?.channel, durationLabel: opts?.durationLabel }
+      const built = entries.map((e) => buildItem(e.url, e.kind, e.quality, e.opts))
-          : undefined
+      set((s) => ({ items: [...built, ...s.items] }))
-      const item: DownloadItem = {
-        id,
-        url,
-        title: opts?.title ?? titleFromUrl(url),
-        channel: opts?.channel ?? 'Resolving…',
-        durationLabel: opts?.durationLabel,
-        thumbnail: opts?.thumbnail,
-        kind,
-        quality,
-        status: 'queued',
-        progress: 0,
-        formatId: opts?.format?.id,
-        formatHasAudio: opts?.format?.hasAudio,
-        options: opts?.options,
-        extraArgs: opts?.extraArgs,
-        incognito: opts?.incognito,
-        collection: opts?.collection,
-        mediaItemId: opts?.mediaItemId,
-        probedMeta
-      }
-      set((s) => ({ items: [item, ...s.items] }))
       pump()
     },
 
@@ -334,6 +392,93 @@ export const useDownloads = create<DownloadState>((set, get) => {
       pump()
     },
 
+    retryAll: () => {
+      set((s) => ({
+        items: s.items.map((i) =>
+          i.status === 'error'
+            ? { ...i, status: 'queued', progress: 0, error: undefined, speed: undefined, eta: undefined }
+            : i
+        )
+      }))
+      pump()
+    },
+
+    pause: (id) => {
+      const cur = get().items.find((i) => i.id === id)
+      if (!cur) return
+      // Only a running download has a live process to stop; a queued item is
+      // just parked in place. Either way it becomes 'paused' (pump ignores it).
+      if (!PREVIEW && cur.status === 'downloading') window.api.pauseDownload(id).catch(() => {})
+      set((s) => ({
+        items: s.items.map((i) =>
+          i.id === id && (i.status === 'downloading' || i.status === 'queued')
+            ? { ...i, status: 'paused', speed: undefined, eta: undefined }
+            : i
+        )
+      }))
+      pump() // pausing a running item frees a slot
+    },
+
+    resume: (id) => {
+      // Re-queue WITHOUT resetting progress (unlike retry): pump() promotes it and
+      // launchItem re-spawns yt-dlp, which continues the partial file by default.
+      set((s) => ({
+        items: s.items.map((i) =>
+          i.id === id && i.status === 'paused' ? { ...i, status: 'queued' } : i
+        )
+      }))
+      pump()
+    },
+
+    prioritize: (id) => {
+      // Reposition the item so pump() — which promotes the highest-index queued
+      // item first (oldest-first over a newest-first array) — picks it next.
+      set((s) => {
+        const idx = s.items.findIndex((i) => i.id === id)
+        if (idx < 0 || s.items[idx].status !== 'queued') return {}
+        const items = s.items.slice()
+        const [it] = items.splice(idx, 1)
+        let after = -1
+        for (let k = 0; k < items.length; k++) if (items[k].status === 'queued') after = k
+        items.splice(after + 1, 0, it)
+        return { items }
+      })
+      pump()
+    },
+
+    saveForLater: (id) => {
+      set((s) => ({
+        items: s.items.map((i) =>
+          i.id === id && i.status === 'queued'
+            ? { ...i, status: 'saved', scheduledFor: undefined }
+            : i
+        )
+      }))
+    },
+
+    queueNow: (id) => {
+      set((s) => ({
+        items: s.items.map((i) =>
+          i.id === id && i.status === 'saved'
+            ? { ...i, status: 'queued', scheduledFor: undefined }
+            : i
+        )
+      }))
+      pump()
+    },
+
+    promoteDueScheduled: () => {
+      const now = Date.now()
+      set((s) => ({
+        items: s.items.map((i) =>
+          i.status === 'saved' && i.scheduledFor != null && i.scheduledFor <= now
+            ? { ...i, status: 'queued', scheduledFor: undefined }
+            : i
+        )
+      }))
+      pump()
+    },
+
     cancel: (id) => {
       const cur = get().items.find((i) => i.id === id)
       if (!cur) return
@@ -356,7 +501,13 @@ export const useDownloads = create<DownloadState>((set, get) => {
 
     clearFinished: () =>
       set((s) => ({
-        items: s.items.filter((i) => i.status === 'downloading' || i.status === 'queued')
+        items: s.items.filter(
+          (i) =>
+            i.status === 'downloading' ||
+            i.status === 'queued' ||
+            i.status === 'paused' ||
+            i.status === 'saved'
+        )
       })),
 
     openFile: (id) => {
@@ -438,6 +589,17 @@ export const useDownloads = create<DownloadState>((set, get) => {
   }
 })
 
+// Promote scheduled ('saved' + a due scheduledFor) items when their time arrives.
+// Session-only: the queue isn't persisted, so a schedule only fires while the app
+// runs (noted in ROADMAP.md). A 15s tick is plenty for minute-granularity times.
+setInterval(() => {
+  const st = useDownloads.getState()
+  const now = Date.now()
+  if (st.items.some((i) => i.status === 'saved' && i.scheduledFor != null && i.scheduledFor <= now)) {
+    st.promoteDueScheduled()
+  }
+}, 15_000)
+
 // Wire main → renderer push events. (Output folder + cap live in the settings store.)
 if (!PREVIEW) {
   window.api.onDownloadEvent((ev) => useDownloads.getState().applyEvent(ev))

src/renderer/src/store/queueStats.ts

@@ -0,0 +1,139 @@
+/**
+ * Pure helpers for the Downloads view (Phase M): a one-line aggregate of the live
+ * queue, and same-video detection for the duplicate guard. Kept free of any store
+ * / window dependency (only a type-only import of DownloadItem) so it can be
+ * unit-tested without constructing the Zustand store or its preview ticker.
+ */
+import type { DownloadItem } from './downloads'
+
+// Parse a human speed string ('4.7 MB/s', '512 KiB/s') into bytes/second. Tolerant
+// of the SI (KB) and binary (KiB) suffixes yt-dlp may emit; the 1000-vs-1024
+// difference is immaterial for a live display estimate.
+function parseSpeed(s?: string): number {
+  if (!s) return 0
+  const m = /([\d.]+)\s*([KMGT]?)i?B\/s/i.exec(s)
+  if (!m) return 0
+  const n = parseFloat(m[1])
+  if (!isFinite(n)) return 0
+  const mult: Record<string, number> = { '': 1, K: 1e3, M: 1e6, G: 1e9, T: 1e12 }
+  return n * (mult[m[2].toUpperCase()] ?? 1)
+}
+
+function formatSpeed(bytesPerSec: number): string {
+  if (bytesPerSec <= 0) return ''
+  const units = ['B/s', 'KB/s', 'MB/s', 'GB/s']
+  let v = bytesPerSec
+  let i = 0
+  while (v >= 1000 && i < units.length - 1) {
+    v /= 1000
+    i++
+  }
+  return `${v.toFixed(1)} ${units[i]}`
+}
+
+// Parse 'M:SS' / 'H:MM:SS' (or bare seconds) into seconds.
+function parseEtaSeconds(s?: string): number {
+  if (!s) return 0
+  const parts = s.split(':').map((p) => Number(p))
+  if (parts.length === 0 || parts.some((p) => !isFinite(p))) return 0
+  return parts.reduce((acc, p) => acc * 60 + p, 0)
+}
+
+function formatEta(totalSeconds: number): string {
+  if (totalSeconds <= 0) return ''
+  const s = Math.round(totalSeconds)
+  const m = Math.floor(s / 60)
+  return `${m}:${String(s % 60).padStart(2, '0')}`
+}
+
+export interface QueueSummary {
+  downloading: number
+  queued: number
+  failed: number
+  /** true when something is downloading or waiting */
+  active: boolean
+  /** 0..1, averaged over downloading + queued items */
+  progress: number
+  /** combined download speed, formatted; '' when nothing is downloading */
+  speedLabel: string
+  /** rough time remaining (the longest active ETA), formatted; '' when unknown */
+  etaLabel: string
+}
+
+/**
+ * Aggregate the live queue into a one-line summary for the Downloads header.
+ * Combined speed is summed across downloading items; the "time left" is the
+ * longest single ETA — a reasonable proxy for when the current batch finishes
+ * (we don't track remaining bytes, so a true combined ETA isn't available).
+ * Queued items count toward the progress average as 0%, so the bar reflects
+ * "how much of the visible work is done", not just the active downloads.
+ */
+export function summarizeQueue(items: DownloadItem[]): QueueSummary {
+  let downloading = 0
+  let queued = 0
+  let failed = 0
+  let progressSum = 0
+  let progressCount = 0
+  let speed = 0
+  let maxEta = 0
+  for (const i of items) {
+    if (i.status === 'downloading') {
+      downloading++
+      progressSum += i.progress
+      progressCount++
+      speed += parseSpeed(i.speed)
+      maxEta = Math.max(maxEta, parseEtaSeconds(i.eta))
+    } else if (i.status === 'queued') {
+      queued++
+      progressCount++
+    } else if (i.status === 'error') {
+      failed++
+    }
+  }
+  return {
+    downloading,
+    queued,
+    failed,
+    active: downloading > 0 || queued > 0,
+    progress: progressCount > 0 ? progressSum / progressCount : 0,
+    speedLabel: formatSpeed(speed),
+    etaLabel: formatEta(maxEta)
+  }
+}
+
+// --- Duplicate detection ----------------------------------------------------
+
+function youtubeId(url: string): string | null {
+  try {
+    const u = new URL(url)
+    const host = u.hostname.replace(/^www\./, '')
+    if (host === 'youtu.be') return u.pathname.slice(1) || null
+    if (host.endsWith('youtube.com')) return u.searchParams.get('v')
+  } catch {
+    /* not a URL */
+  }
+  return null
+}
+
+function normalizeUrl(url: string): string {
+  try {
+    const u = new URL(url)
+    const host = u.hostname.replace(/^www\./, '').toLowerCase()
+    return `${u.protocol}//${host}${u.pathname.replace(/\/$/, '')}${u.search}`
+  } catch {
+    return url.trim()
+  }
+}
+
+/**
+ * True when two URLs point at the same video: a matching YouTube id when both
+ * are YouTube links, otherwise normalised-URL equality (host lower-cased, `www.`
+ * and a trailing slash stripped). Powers the "already in your queue" guard.
+ */
+export function sameVideo(a: string, b: string): boolean {
+  if (a === b) return true
+  const ya = youtubeId(a)
+  const yb = youtubeId(b)
+  if (ya && yb) return ya === yb
+  return normalizeUrl(a) === normalizeUrl(b)
+}

src/renderer/src/store/settings.ts

@@ -21,15 +21,21 @@ const FALLBACK: Settings = {
   useAria2c: false,
   cookieSource: 'none',
   cookiesBrowser: 'chrome',
+  youtubePlayerClient: '',
+  youtubePoToken: '',
   restrictFilenames: false,
   downloadArchive: false,
+  autoUpdateYtdlp: true,
+  ytdlpChannel: 'nightly',
+  ytdlpLastUpdateCheck: 0,
   customCommandEnabled: false,
   defaultTemplateId: null,
   notifyOnComplete: true,
   autoDownloadNew: true,
   // True in preview so design work isn't blocked behind the welcome screen;
   // a real first launch gets `false` from main/settings.ts's DEFAULTS instead.
-  hasCompletedOnboarding: PREVIEW
+  hasCompletedOnboarding: PREVIEW,
+  minimizeToTray: false
 }
 
 interface SettingsState extends Settings {

src/renderer/src/store/sources.ts

@@ -6,11 +6,6 @@ import { useSettings } from './settings'
 // True in the standalone browser preview (no Electron preload).
 const PREVIEW = typeof window === 'undefined' || !window.electron
 
-// Cap on how many items one "Download" click enqueues, so an entire channel
-// can't flood the live queue at once — the rest stay pending for a follow-up
-// click. (The automatic incremental feeder is Phase I; see ROADMAP-PINCHFLAT.md.)
-export const MAX_ENQUEUE_BATCH = 100
-
 // --- Preview seed data ------------------------------------------------------
 
 function seedItems(sourceId: string, playlist: string, n: number, downloadedUpTo = 0): MediaItem[] {
@@ -87,8 +82,10 @@ interface SourcesState {
   reindexSource: (id: string) => Promise<void>
   removeSource: (id: string) => void
   /**
-   * Enqueue the given media items into the download queue with folder context,
+   * Enqueue the given media items into the download queue with folder context.
-   * capped at MAX_ENQUEUE_BATCH. Returns how many were actually enqueued.
+   * Queues all of them — one click can fill the queue with an entire channel,
+   * which maxConcurrent then gates into download slots. Returns how many were
+   * enqueued.
    */
   enqueueItems: (sourceId: string, items: MediaItem[]) => number
   /** mark an item downloaded once its queue download completes (called by the downloads store) */
@@ -185,22 +182,26 @@ export const useSources = create<SourcesState>((set, get) => ({
     const settings = useSettings.getState()
     const kind = settings.defaultKind
     const quality = kind === 'video' ? settings.defaultVideoQuality : settings.defaultAudioQuality
-    const batch = items.slice(0, MAX_ENQUEUE_BATCH)
+    // One batched state update + pump, so queuing a whole channel stays O(n).
-    const add = useDownloads.getState().addFromUrl
+    useDownloads.getState().addMany(
-    for (const it of batch) {
+      items.map((it) => ({
-      add(it.url, kind, quality, {
+        url: it.url,
-        title: it.title,
+        kind,
-        channel: src?.channel,
+        quality,
-        durationLabel: it.durationLabel,
+        opts: {
-        collection: {
+          title: it.title,
-          channel: src?.channel || src?.title || 'Channel',
+          channel: src?.channel,
-          playlist: it.playlistTitle,
+          durationLabel: it.durationLabel,
-          index: it.playlistIndex
+          collection: {
-        },
+            channel: src?.channel || src?.title || 'Channel',
-        mediaItemId: it.id
+            playlist: it.playlistTitle,
-      })
+            index: it.playlistIndex
-    }
+          },
-    return batch.length
+          mediaItemId: it.id
+        }
+      }))
+    )
+    return items.length
   },
 
   markDownloaded: (itemId, filePath) => {

src/shared/ipc.ts

@@ -15,9 +15,11 @@ export const IpcChannels = {
   /** main → renderer push channel for installer download progress */
   appUpdateProgress: 'app:update-progress',
   ytdlpVersion: 'ytdlp:version',
+  ffmpegVersion: 'ffmpeg:version',
   probe: 'media:probe',
   downloadStart: 'download:start',
   downloadCancel: 'download:cancel',
+  downloadPause: 'download:pause',
   defaultFolder: 'download:default-folder',
   chooseFolder: 'download:choose-folder',
   openPath: 'shell:open-path',
@@ -40,6 +42,8 @@ export const IpcChannels = {
   templatesRemove: 'templates:remove',
   commandPreview: 'command:preview',
   ytdlpUpdate: 'ytdlp:update',
+  /** main → renderer push channel for background yt-dlp auto-update status */
+  ytdlpAutoUpdateStatus: 'ytdlp:auto-update-status',
   errorLogList: 'errorlog:list',
   errorLogClear: 'errorlog:clear',
   backupExport: 'backup:export',
@@ -67,7 +71,14 @@ export const IpcChannels = {
   scheduledSyncGet: 'sources:scheduled-sync-get',
   scheduledSyncSet: 'sources:scheduled-sync-set',
   /** main → renderer push channel for live indexing progress */
-  indexProgress: 'sources:index-progress'
+  indexProgress: 'sources:index-progress',
+  // --- Built-in yt-dlp terminal (Phase N) ---
+  terminalRun: 'terminal:run',
+  terminalCancel: 'terminal:cancel',
+  /** main → renderer push channel for live terminal output lines */
+  terminalOutput: 'terminal:output',
+  /** renderer → main: reflect overall queue progress on the Windows taskbar (Phase O) */
+  taskbarProgress: 'taskbar:progress'
 } as const
 
 /** Sentinel format id meaning "let yt-dlp pick the best video+audio". */
@@ -143,6 +154,13 @@ export interface DownloadOptions {
   videoContainer: VideoContainer
   /** preferred video codec (sort tiebreaker, not a hard filter) */
   preferredVideoCodec: VideoCodecPref
+  /**
+   * Advanced: a raw yt-dlp `-S` format-sort string (e.g. 'res:1080,vcodec:av01,size').
+   * When non-empty it replaces the codec-derived sort, letting power users rank
+   * resolution / codec / container / size by weighted priority. Empty = use the
+   * preferredVideoCodec tiebreaker.
+   */
+  formatSort: string
   /** download + embed subtitles into video */
   embedSubtitles: boolean
   /** comma-separated yt-dlp sub-lang selectors, e.g. 'en' or 'en.*,es' */
@@ -155,6 +173,8 @@ export interface DownloadOptions {
   sponsorBlockCategories: SponsorBlockCategory[]
   /** embed chapter markers */
   embedChapters: boolean
+  /** split the download into one file per chapter (--split-chapters) */
+  splitChapters: boolean
   /** embed metadata (title/artist/etc.) */
   embedMetadata: boolean
   /** embed the thumbnail (cover art for audio, poster for mp4/mkv video) */
@@ -173,6 +193,7 @@ export const DEFAULT_DOWNLOAD_OPTIONS: DownloadOptions = {
   audioFormat: 'mp3',
   videoContainer: 'mp4',
   preferredVideoCodec: 'any',
+  formatSort: '',
   embedSubtitles: false,
   subtitleLanguages: 'en',
   autoSubtitles: false,
@@ -180,6 +201,7 @@ export const DEFAULT_DOWNLOAD_OPTIONS: DownloadOptions = {
   sponsorBlockMode: 'remove',
   sponsorBlockCategories: ['sponsor'],
   embedChapters: false,
+  splitChapters: false,
   embedMetadata: true,
   embedThumbnail: true,
   cropThumbnail: false,
@@ -196,6 +218,18 @@ export interface YtdlpVersionResult {
   error?: string
 }
 
+/**
+ * Versions of the bundled ffmpeg + ffprobe, for display in Settings. Each is the
+ * parsed version token, or null when that binary is missing or unreadable. These
+ * ship with AeroFetch and aren't auto-updated (ffmpeg has no self-update and,
+ * unlike yt-dlp, doesn't break as sites change), so there's no ok/error here —
+ * just "what's installed".
+ */
+export interface FfmpegVersionResult {
+  ffmpeg: string | null
+  ffprobe: string | null
+}
+
 /** Result of checking the configured Gitea repo for a newer AeroFetch release. */
 export interface AppUpdateInfo {
   ok: boolean
@@ -260,6 +294,24 @@ export interface YtdlpUpdateResult {
   error?: string
 }
 
+/**
+ * Status of a background (startup) yt-dlp auto-update, pushed main → renderer on
+ * IpcChannels.ytdlpAutoUpdateStatus so the Settings UI can reflect a check that
+ * ran on its own — no button click needed.
+ */
+export interface YtdlpAutoUpdateStatus {
+  /** 'checking' when the update starts; the rest are terminal */
+  phase: 'checking' | 'updated' | 'current' | 'error'
+  /** which channel was checked */
+  channel: YtdlpUpdateChannel
+  /** yt-dlp version after the run, when known (phases 'updated' | 'current') */
+  version?: string
+  /** epoch ms the check finished (terminal phases) — feeds the "last checked" line */
+  checkedAt?: number
+  /** error text when phase === 'error' */
+  error?: string
+}
+
 /** A single selectable output format, derived from `yt-dlp -J`. */
 export interface FormatOption {
   /** yt-dlp format_id, or BEST_FORMAT_ID for the auto-best option */
@@ -356,6 +408,13 @@ export interface StartDownloadOptions {
    * download even when the settings default is enabled.
    */
   extraArgs?: string
+  /**
+   * Optional trim: keep only these time ranges. Raw user text — ranges like
+   * '1:30-2:00', comma- or newline-separated — normalised to yt-dlp
+   * `--download-sections` specs in buildArgs (parseTrimSections). Empty or
+   * undefined downloads the whole media.
+   */
+  trim?: string
   /**
    * Metadata the renderer already fetched when probing the URL (title/channel/
    * duration). When present, main uses it directly instead of spawning a second
@@ -433,10 +492,27 @@ export interface Settings {
   cookieSource: CookieSource
   /** which browser to read cookies from when cookieSource is 'browser' */
   cookiesBrowser: CookieBrowser
+  /**
+   * YouTube reliability (Phase P). When set, emitted as
+   * `--extractor-args "youtube:player_client=…;po_token=…"`:
+   *  - playerClient: an alternate extraction client (e.g. 'web_safari', 'tv',
+   *    'mweb') — a common workaround for YouTube throttling/extraction breakage.
+   *  - poToken: a manually-supplied Proof-of-Origin token for the bot check.
+   * Both empty = yt-dlp's defaults. (Automatic WebView token minting is deferred;
+   * this is the argv plumbing it would feed.)
+   */
+  youtubePlayerClient: string
+  youtubePoToken: string
   /** sanitize output filenames to a portable ASCII-only subset (--restrict-filenames) */
   restrictFilenames: boolean
   /** record completed downloads in a yt-dlp --download-archive file to skip repeats */
   downloadArchive: boolean
+  /** keep the managed yt-dlp.exe auto-updated in the background on launch */
+  autoUpdateYtdlp: boolean
+  /** channel the auto-updater (and the manual "Update yt-dlp" button) updates to */
+  ytdlpChannel: YtdlpUpdateChannel
+  /** epoch ms of the last automatic yt-dlp update check; 0 = never run */
+  ytdlpLastUpdateCheck: number
   /** apply a named custom-command template's extra args to every new download */
   customCommandEnabled: boolean
   /** id of the CommandTemplate applied when customCommandEnabled is on; null = none picked yet */
@@ -447,6 +523,8 @@ export interface Settings {
   autoDownloadNew: boolean
   /** false until the first-run welcome screen has been dismissed */
   hasCompletedOnboarding: boolean
+  /** keep AeroFetch running in the system tray when its window is closed (Phase O) */
+  minimizeToTray: boolean
 }
 
 /**
@@ -459,6 +537,13 @@ export interface CommandTemplate {
   id: string
   name: string
   args: string
+  /**
+   * Optional regex (matched case-insensitively against the download URL). When
+   * set and custom commands are enabled, this template auto-applies to any URL it
+   * matches — taking precedence over the global defaultTemplateId. Empty/undefined
+   * means the template is only applied when explicitly chosen as the default.
+   */
+  urlPattern?: string
 }
 
 /** Result of building the exact yt-dlp command line for the current form state, without running it. */
@@ -621,3 +706,29 @@ export interface ScheduledSyncStatus {
   enabled: boolean
   error?: string
 }
+
+// --- Built-in yt-dlp terminal (Phase N) -------------------------------------
+// A power-user console that runs the bundled yt-dlp with raw, user-typed args
+// and streams its output. The binary is fixed to yt-dlp (never arbitrary exes),
+// and the feature is gated on the same customCommandEnabled consent flag as the
+// per-download extra args (extra args can run code via --exec — audit F2).
+
+/** Live output pushed on IpcChannels.terminalOutput while a terminal command runs. */
+export type TerminalEvent =
+  | { type: 'output'; id: string; line: string; stream: 'stdout' | 'stderr' }
+  | { type: 'done'; id: string; code: number | null }
+  | { type: 'error'; id: string; error: string }
+
+/** Result of starting a terminal command (pre-spawn validation only). */
+export interface TerminalRunResult {
+  ok: boolean
+  error?: string
+}
+
+/** Overall queue state for the Windows taskbar progress bar (Phase O). */
+export interface TaskbarProgress {
+  /** 0..1 overall fraction; ignored when mode is 'none' */
+  fraction: number
+  /** taskbar bar mode: hidden, normal, or red (some failed) */
+  mode: 'none' | 'normal' | 'error'
+}

test/buildArgs.test.ts

@@ -2,6 +2,7 @@ import { describe, it, expect } from 'vitest'
 import {
   buildArgs,
   parseExtraArgs,
+  parseTrimSections,
   selectExtraArgs,
   formatCommandLine,
   sanitizeDirSegment,
@@ -460,6 +461,147 @@ describe('sidecar files', () => {
   })
 })
 
+describe('YouTube extractor-args', () => {
+  it('combines player_client and po_token into one youtube: group', () => {
+    const argv = build(opts(), dlo(), {
+      ...NO_ACCESS,
+      youtubePlayerClient: 'web_safari',
+      youtubePoToken: 'web.gvs+ABC'
+    })
+    expect(hasSeq(argv, '--extractor-args', 'youtube:player_client=web_safari;po_token=web.gvs+ABC')).toBe(
+      true
+    )
+  })
+
+  it('emits only the fields that are set', () => {
+    const argv = build(opts(), dlo(), { ...NO_ACCESS, youtubePlayerClient: 'tv' })
+    expect(hasSeq(argv, '--extractor-args', 'youtube:player_client=tv')).toBe(true)
+  })
+
+  it('emits nothing when both are empty', () => {
+    expect(build(opts(), dlo(), NO_ACCESS)).not.toContain('--extractor-args')
+  })
+})
+
+describe('format sorting (-S)', () => {
+  it('emits a raw -S string when formatSort is set, overriding the codec tiebreaker', () => {
+    const argv = build(opts(), dlo({ formatSort: 'res:1080,vcodec:av01', preferredVideoCodec: 'h264' }))
+    expect(hasSeq(argv, '-S', 'res:1080,vcodec:av01')).toBe(true)
+    expect(hasSeq(argv, '-S', 'res,fps,vcodec:h264')).toBe(false)
+  })
+
+  it('falls back to the codec tiebreaker when formatSort is empty', () => {
+    const argv = build(opts(), dlo({ formatSort: '', preferredVideoCodec: 'vp9' }))
+    expect(hasSeq(argv, '-S', 'res,fps,vcodec:vp9')).toBe(true)
+  })
+})
+
+describe('selectExtraArgs url-pattern matching', () => {
+  const base = {
+    customCommandEnabled: true,
+    perDownloadExtraArgs: undefined,
+    defaultTemplateId: null as string | null
+  }
+  const templates = [
+    { id: 'a', args: '--audio-quality 0', urlPattern: 'soundcloud\\.com' },
+    { id: 'b', args: '--write-thumbnail' }
+  ]
+
+  it('auto-applies a template whose urlPattern matches the URL', () => {
+    const out = selectExtraArgs({ ...base, templates, url: 'https://soundcloud.com/x/y' })
+    expect(out).toEqual(['--audio-quality', '0'])
+  })
+
+  it('does not apply a urlPattern template to a non-matching URL', () => {
+    const out = selectExtraArgs({ ...base, templates, url: 'https://youtube.com/watch?v=x' })
+    expect(out).toEqual([])
+  })
+
+  it('urlPattern match takes precedence over the global default template', () => {
+    const out = selectExtraArgs({
+      ...base,
+      defaultTemplateId: 'b',
+      templates,
+      url: 'https://soundcloud.com/x'
+    })
+    expect(out).toEqual(['--audio-quality', '0'])
+  })
+
+  it('a bad regex never matches (and is skipped safely)', () => {
+    const out = selectExtraArgs({
+      ...base,
+      templates: [{ id: 'c', args: '--x', urlPattern: '(' }],
+      url: 'https://soundcloud.com/x'
+    })
+    expect(out).toEqual([])
+  })
+})
+
+describe('chapters', () => {
+  it('emits --split-chapters when splitChapters is on', () => {
+    expect(build(opts(), dlo({ splitChapters: true }))).toContain('--split-chapters')
+  })
+
+  it('does not emit --split-chapters by default', () => {
+    expect(build(opts(), dlo())).not.toContain('--split-chapters')
+  })
+
+  it('emits --split-chapters independently of --embed-chapters', () => {
+    const argv = build(opts(), dlo({ splitChapters: true, embedChapters: false }))
+    expect(argv).toContain('--split-chapters')
+    expect(argv).not.toContain('--embed-chapters')
+  })
+})
+
+describe('parseTrimSections', () => {
+  it('normalises plain time ranges to *START-END specs', () => {
+    expect(parseTrimSections('1:30-2:00')).toEqual(['*1:30-2:00'])
+    expect(parseTrimSections('90-120')).toEqual(['*90-120'])
+    expect(parseTrimSections('0:00:10.5-0:00:20')).toEqual(['*0:00:10.5-0:00:20'])
+  })
+
+  it('splits on commas and newlines and trims whitespace', () => {
+    expect(parseTrimSections(' 0:30-1:00 , 2:00-2:30 \n 3:00-3:30 ')).toEqual([
+      '*0:30-1:00',
+      '*2:00-2:30',
+      '*3:00-3:30'
+    ])
+  })
+
+  it('keeps an existing leading * but does not double it', () => {
+    expect(parseTrimSections('*1:00-2:00')).toEqual(['*1:00-2:00'])
+  })
+
+  it('drops malformed tokens so garbage never reaches the argv', () => {
+    expect(parseTrimSections('not-a-range')).toEqual([])
+    expect(parseTrimSections('1:30')).toEqual([]) // no end
+    expect(parseTrimSections('')).toEqual([])
+    expect(parseTrimSections(undefined)).toEqual([])
+  })
+})
+
+describe('trim (--download-sections)', () => {
+  it('emits a --download-sections spec per range plus --force-keyframes-at-cuts', () => {
+    const argv = build(opts({ trim: '0:30-1:00, 2:00-2:30' }), dlo())
+    expect(hasSeq(argv, '--download-sections', '*0:30-1:00')).toBe(true)
+    expect(hasSeq(argv, '--download-sections', '*2:00-2:30')).toBe(true)
+    expect(argv).toContain('--force-keyframes-at-cuts')
+  })
+
+  it('emits nothing when there is no trim', () => {
+    const argv = build(opts(), dlo())
+    expect(argv).not.toContain('--download-sections')
+  })
+
+  it('does not double --force-keyframes-at-cuts when SponsorBlock-remove is also on', () => {
+    const argv = build(
+      opts({ trim: '0:30-1:00' }),
+      dlo({ sponsorBlock: true, sponsorBlockMode: 'remove', sponsorBlockCategories: ['sponsor'] })
+    )
+    expect(argv.filter((a) => a === '--force-keyframes-at-cuts')).toHaveLength(1)
+  })
+})
+
 // --- Collection folder paths (Phase G, media-manager) -----------------------
 
 describe('sanitizeDirSegment', () => {

test/queueStats.test.ts

@@ -0,0 +1,101 @@
+import { describe, it, expect } from 'vitest'
+import { summarizeQueue, sameVideo } from '../src/renderer/src/store/queueStats'
+import type { DownloadItem } from '../src/renderer/src/store/downloads'
+
+// Minimal item factory — only the fields summarizeQueue reads.
+function item(overrides: Partial<DownloadItem>): DownloadItem {
+  return {
+    id: Math.random().toString(36).slice(2),
+    url: 'https://youtube.com/watch?v=x',
+    title: 'x',
+    kind: 'video',
+    quality: '1080p',
+    status: 'queued',
+    progress: 0,
+    ...overrides
+  }
+}
+
+describe('summarizeQueue', () => {
+  it('counts statuses and flags active', () => {
+    const s = summarizeQueue([
+      item({ status: 'downloading', progress: 0.5 }),
+      item({ status: 'queued' }),
+      item({ status: 'error' }),
+      item({ status: 'completed', progress: 1 }),
+      item({ status: 'canceled' })
+    ])
+    expect(s.downloading).toBe(1)
+    expect(s.queued).toBe(1)
+    expect(s.failed).toBe(1)
+    expect(s.active).toBe(true)
+  })
+
+  it('is inactive and zeroed when nothing is downloading or queued', () => {
+    const s = summarizeQueue([item({ status: 'completed', progress: 1 })])
+    expect(s.active).toBe(false)
+    expect(s.progress).toBe(0)
+    expect(s.speedLabel).toBe('')
+    expect(s.etaLabel).toBe('')
+  })
+
+  it('averages progress over downloading + queued (queued counts as 0%)', () => {
+    // one at 80%, one queued at 0% → 40%
+    const s = summarizeQueue([
+      item({ status: 'downloading', progress: 0.8 }),
+      item({ status: 'queued' })
+    ])
+    expect(s.progress).toBeCloseTo(0.4, 5)
+  })
+
+  it('sums download speeds across MB/s and MiB/s strings', () => {
+    const s = summarizeQueue([
+      item({ status: 'downloading', progress: 0.1, speed: '4.0 MB/s' }),
+      item({ status: 'downloading', progress: 0.1, speed: '2000 KiB/s' })
+    ])
+    // 4.0 MB/s + ~2.0 MB/s ≈ 6.0 MB/s
+    expect(s.speedLabel).toBe('6.0 MB/s')
+  })
+
+  it('reports the longest active ETA as the time left', () => {
+    const s = summarizeQueue([
+      item({ status: 'downloading', progress: 0.5, eta: '0:30' }),
+      item({ status: 'downloading', progress: 0.2, eta: '2:10' })
+    ])
+    expect(s.etaLabel).toBe('2:10')
+  })
+})
+
+describe('sameVideo', () => {
+  it('matches identical URLs', () => {
+    expect(sameVideo('https://x.com/a', 'https://x.com/a')).toBe(true)
+  })
+
+  it('matches YouTube links by video id across watch/youtu.be/extra params', () => {
+    expect(
+      sameVideo(
+        'https://www.youtube.com/watch?v=dQw4w9WgXcQ',
+        'https://youtu.be/dQw4w9WgXcQ'
+      )
+    ).toBe(true)
+    expect(
+      sameVideo(
+        'https://youtube.com/watch?v=dQw4w9WgXcQ&list=PL123',
+        'https://www.youtube.com/watch?v=dQw4w9WgXcQ'
+      )
+    ).toBe(true)
+  })
+
+  it('does not match different videos', () => {
+    expect(
+      sameVideo(
+        'https://youtube.com/watch?v=aaaaaaaaaaa',
+        'https://youtube.com/watch?v=bbbbbbbbbbb'
+      )
+    ).toBe(false)
+  })
+
+  it('normalises www. and trailing slash for non-YouTube URLs', () => {
+    expect(sameVideo('https://www.vimeo.com/123/', 'https://vimeo.com/123')).toBe(true)
+  })
+})

test/ytdlpPolicy.test.ts

@@ -0,0 +1,34 @@
+import { describe, it, expect } from 'vitest'
+import { shouldAutoCheckYtdlp, AUTO_UPDATE_INTERVAL_MS } from '../src/main/ytdlpPolicy'
+
+const NOW = 1_782_435_469_486 // arbitrary fixed "now"
+
+describe('shouldAutoCheckYtdlp', () => {
+  it('never checks when auto-update is disabled', () => {
+    expect(shouldAutoCheckYtdlp(false, 0, NOW)).toBe(false)
+    // …even if a full interval has elapsed.
+    expect(shouldAutoCheckYtdlp(false, NOW - AUTO_UPDATE_INTERVAL_MS * 2, NOW)).toBe(false)
+  })
+
+  it('checks on first run (lastCheck is 0 / never)', () => {
+    expect(shouldAutoCheckYtdlp(true, 0, NOW)).toBe(true)
+  })
+
+  it('skips while inside the throttle window', () => {
+    // Checked one minute ago → far inside the 24h window.
+    expect(shouldAutoCheckYtdlp(true, NOW - 60_000, NOW)).toBe(false)
+    // Exactly one ms short of the interval still skips.
+    expect(shouldAutoCheckYtdlp(true, NOW - (AUTO_UPDATE_INTERVAL_MS - 1), NOW)).toBe(false)
+  })
+
+  it('checks once the interval has elapsed (boundary inclusive)', () => {
+    expect(shouldAutoCheckYtdlp(true, NOW - AUTO_UPDATE_INTERVAL_MS, NOW)).toBe(true)
+    expect(shouldAutoCheckYtdlp(true, NOW - AUTO_UPDATE_INTERVAL_MS * 3, NOW)).toBe(true)
+  })
+
+  it('honours a custom interval', () => {
+    const hour = 60 * 60 * 1000
+    expect(shouldAutoCheckYtdlp(true, NOW - 30 * 60_000, NOW, hour)).toBe(false)
+    expect(shouldAutoCheckYtdlp(true, NOW - hour, NOW, hour)).toBe(true)
+  })
+})