feat(audit): Batch 12 — a11y & discoverability

- L118: decouple URL-field focus. The DownloadBar registers a focuser (its own
  input ref) in the nav store; App calls useNav.getState().focusUrlField() on
  launch / "New download" instead of document.getElementById('aerofetch-url').
  The hardcoded id is removed — App no longer reaches into DownloadBar's markup.
- L155: the accent swatches are now a real role="radiogroup" with aria-checked
  role="radio" swatches, roving tabindex, ←/→/↑/↓/Home/End arrow-key navigation,
  and the shared focus ring — matching the app's SegmentedControl radio pattern.
  Redundant "(selected)" aria-label text dropped (aria-checked conveys it).
- UX21: keyboard-shortcut discoverability — an Onboarding "Press Ctrl+K anytime"
  tip, and the command palette's Settings action surfaces its "Ctrl ," shortcut.
- UX22 / L67: onboarding is revisitable — a "Show welcome tips again" button in
  Settings → About re-opens the welcome screen.

Verified & documented (no code needed): UX17 (Fetch/Paste already have aria-label
+ focus-reachable Hint tooltips — a11y met; a permanent visible label is a compact-
layout choice), UI24 (context menus "none by design" — row actions are all visible
inline buttons + keyboard, and Fluent's Menu is portal-based, which the app avoids
for the dev-GPU flicker reason).

Verified: typecheck (node+web) + 279 tests + eslint + production build green;
touched files prettier-clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

CODE-AUDIT.md

@@ -183,6 +183,18 @@ redesign — visual), UX18/UX26 (subjective/visual polish), L131 (arguably by-de
 and **L142** (the history/templates/sources IPC-return reconciliation — a focused own-PR, CC14's tail). All
 green: typecheck (node+web) + 279 tests + eslint + production build; touched files prettier-clean.
 
+**Session 2026-07-01 pass 9 (Batch 12 — a11y & discoverability):** **L118** (URL-field focus decoupled — the
+DownloadBar registers a focuser in the nav store and App calls `focusUrlField()` instead of
+`getElementById('aerofetch-url')`; the hardcoded id is removed), **L155** (accent swatches are now a real
+`radiogroup` — `aria-checked` radios, roving tabindex, arrow-key nav + focus ring, matching the app's
+`SegmentedControl` pattern), **UX21** (an Onboarding "Press Ctrl+K anytime" tip + the palette's Settings action
+shows "Ctrl ,"), and **UX22 + L67** (a "Show welcome tips again" button in Settings → About re-opens onboarding,
+making it revisitable). Verified-and-documented: **UX17** (Fetch/Paste already have `aria-label` + focus-reachable
+`Hint`s — a11y met; a visible label is a compact-layout choice) and **UI24** ("none by design" — every row action
+is a visible inline button + keyboard, and Fluent's context `Menu` is portal-based, which the app avoids for the
+GPU-flicker reason). All green: typecheck (node+web) + 279 tests + eslint + production build; touched files
+prettier-clean.
+
 **Deliberately deferred** (need live-app/visual verification or are larger refactors the
 audit itself defers to 1.x): the wire-or-cut features (M5/M6/UX1), the god-file/store
 refactors (C1, C2, H1), the SIMP* helpers + shared-UI-token work, the CC* consolidations,
@@ -734,7 +746,10 @@ token system + shared primitives (UI/SIMP — high value, larger effort) · i18n
 - [ ] **L64 — `ARIA2C_ARGS` connection params hardcoded** (`-x16 -s16 -k1M`), no user control.
 - [ ] **L65 — Pause uses `taskkill /F`** like cancel — a forced kill risks an unflushed `.part` tail vs a graceful stop.
 - [x] **L66 — Sidebar caption flips** "yt-dlp frontend" → "v<x>" once the version loads (text shift on boot).
-- [ ] **L67 — Onboarding has no Skip and can't be revisited** (no "show tips again").
+- [x] **L67 — Onboarding has no Skip and can't be revisited** (no "show tips again"). *Fixed the revisit
+  half (with UX22): Settings → About has a "Show welcome tips again" button that re-opens the onboarding
+  screen. Onboarding is a single dismissible card (its "Get started" button *is* the skip — you can proceed
+  without choosing folders, defaults apply), so a separate Skip is redundant.*
 - [x] **L68 — Background-running notification fires once per process** (`notifiedBackground` never
   resets) — won't remind on later window closes.
 - [x] **L69 — `settings.ts` mixes path helpers with persistence** (`getDefaultMediaDir`/
@@ -915,8 +930,14 @@ token system + shared primitives (UI/SIMP — high value, larger effort) · i18n
   inside an already-populated screen). The Terminal log centers "No output yet." in the log box (a `logEmpty`
   flex modifier); Diagnostics centers "No errors yet." — so both read as empty states rather than a stray line
   of inline text.*
-- [ ] **L118 — Cross-component focus via hardcoded id.** App focuses the URL field with
+- [x] **L118 — Cross-component focus via hardcoded id.** App focuses the URL field with
   `document.getElementById('aerofetch-url')` — brittle coupling into DownloadBar's markup.
+  *Fixed: the DownloadBar registers a focuser for its own URL input (a local ref) in the nav store
+  (`registerUrlFocuser`); App calls `useNav.getState().focusUrlField()` on launch / "New download" instead of
+  querying the DOM by id ([nav.ts](src/renderer/src/store/nav.ts), [App.tsx](src/renderer/src/App.tsx),
+  [DownloadBar.tsx](src/renderer/src/components/DownloadBar.tsx)). The `id="aerofetch-url"` is gone — App no
+  longer reaches into DownloadBar's markup; the double-rAF (wait for mount/paint) stays so the focuser is
+  registered before it's called.*
 - [x] **L119 — "No items" copy varies** — "No … yet" (most) vs "Output will appear here." (Terminal) vs "No errors logged." (Diagnostics).
 - [x] **L120 — Fluent `Card` vs hand-styled `div` cards.** Only Settings/Onboarding use `<Card>`; every
   other card surface is a bespoke styled `<div>`. *Resolved (convention documented + tokens applied):
@@ -1080,9 +1101,13 @@ token system + shared primitives (UI/SIMP — high value, larger effort) · i18n
   Library suggestion) all read just "Dismiss" — ambiguous to a screen reader. Name what's dismissed.
 - [x] **L154 — Instructional text in an aria-label.** Sidebar theme-cycle button is
   `aria-label="Theme: Dark. Click to change."` — "Click to change" is UI instruction, not a name.
-- [ ] **L155 — Accent swatches aren't a `radiogroup`.** They're a single-select set rendered as plain
+- [x] **L155 — Accent swatches aren't a `radiogroup`.** They're a single-select set rendered as plain
   buttons with `aria-pressed`, while the Theme controls (also single-select) use `role="radiogroup"`/`radio`.
-  Inconsistent single-select a11y pattern.
+  Inconsistent single-select a11y pattern. *Fixed: the accent swatches are now a real `role="radiogroup"` with
+  `role="radio"` + `aria-checked` swatches, roving tabindex, and ←/→/↑/↓/Home/End arrow-key navigation +
+  the shared focus ring ([AppearanceCard.tsx](src/renderer/src/components/settings/AppearanceCard.tsx)) —
+  matching the `SegmentedControl` radiogroup pattern used elsewhere. The redundant "(selected)" text in the
+  `aria-label` is gone (aria-checked conveys it).*
 - [x] **L156 — `datetime-local` schedule has no `min`.** Past times are selectable, then silently download
   now (extends L57). Add `min={now}`.
 - [ ] **L157 — `removeSource` doesn't cancel in-flight downloads.** Removing a source while its videos are
@@ -1277,9 +1302,15 @@ are an undefined spacing/radius/type scale and a drift between Fluent components
   (Onboarding), and an **unstyled separate `BrowserWindow`** (cookie sign-in) that shows none of the
   app's theme/chrome. **Standard:** keep native for file/confirm; unify in-app overlays under one
   themed primitive; theme the sign-in window's title/background to match.
-- [ ] **UI24 — No context menus anywhere.** Every row exposes actions only as inline buttons;
+- [x] **UI24 — No context menus anywhere.** Every row exposes actions only as inline buttons;
   right-click does nothing on any screen, despite many per-row actions that conventionally also live on
   right-click. **Standard:** add consistent right-click menus mirroring row actions, or note "none by design."
+  *Resolved as "none by design" (documented): every row action is already a visible inline button with a
+  tooltip, and lists support keyboard operation (Delete, Ctrl+A). Fluent's `Menu` is **portal-based**, and
+  this app deliberately avoids portal overlays — they blank/flicker on the dev-machine GPU (the same reason
+  Select/CommandPalette/Toaster are hand-rolled non-portal; see the gpu-flicker note). A hand-rolled
+  non-portal context-menu primitive is a sizable build with little to add over the always-visible actions, so
+  right-click menus are intentionally not provided. Revisit if the GPU/portal issue is resolved.*
 - [x] **UI25 — No in-app global status surface.** Queue progress shows only on the Downloads tab's
   summary strip; on any other tab there's no in-app sign downloads are running (only the OS taskbar).
   **Standard:** a persistent affordance (e.g. a sidebar "Downloads" badge with the active count).
@@ -1479,7 +1510,12 @@ root cause is already filed.
   palette; opening the app or the Downloads tab requires a click to start typing. **Fix:** autofocus it.
   *Fixed: an `App` mount effect focuses `#aerofetch-url` on launch when the Downloads tab is active
   (double-rAF for paint, reusing the command palette's focus pattern).*
-- [ ] **UX17 — Icon-only Fetch/Paste buttons** rely on hover tooltips for meaning (UI a11y; new users on touch/keyboard miss them). **Fix:** labels or `aria`-described affordances.
+- [x] **UX17 — Icon-only Fetch/Paste buttons** rely on hover tooltips for meaning (UI a11y; new users on touch/keyboard miss them). **Fix:** labels or `aria`-described affordances.
+  *Resolved (a11y met; verified): both buttons already carry an `aria-label` (Fetch = "Preview available
+  formats (optional)", Paste = "Paste from clipboard") **and** a `Hint` tooltip that shows on hover *and*
+  keyboard focus — so screen-reader and keyboard users get the name; the icon isn't the only affordance. A
+  permanently-visible text label is a deliberate compact-layout tradeoff for the URL row (the Download button
+  beside it carries the primary text label), so it's left as a visual choice, not an a11y gap.*
 - [ ] **UX18 — The quality control morphs after Fetch** (preset list → real formats; label "Quality" →
   "Quality / format") in place — a surprising transform. **Fix:** keep a stable control with a clear "formats loaded" state.
   *Deferred (subjective visual): the morph is arguably informative (the label change signals real formats
@@ -1490,10 +1526,18 @@ root cause is already filed.
 - [ ] **UX20 — "App is still running" surprise.** Closing with a download active hides to tray and
   notifies once per process (L68); later closes give no hint, so the window "won't close" reads as a
   bug. **Fix:** a persistent tray hint / first-close explainer.
-- [ ] **UX21 — No keyboard-shortcut discoverability.** Ctrl+K (palette), Enter, Ctrl+Enter are
+- [x] **UX21 — No keyboard-shortcut discoverability.** Ctrl+K (palette), Enter, Ctrl+Enter are
   undocumented; there's no "?"/shortcuts screen. **Fix:** a shortcuts hint or help affordance.
-- [ ] **UX22 — Onboarding is shallow and one-shot** (L67): three tips, no folder choice, not
+  *Fixed (discoverability): the first-run Onboarding now includes a tip — "Press Ctrl+K anytime to jump to any
-  revisitable; the clipboard tip requires a focus event a first-timer won't trigger.
+  screen or start a new download." — so new users learn the palette, which is itself the discovery surface for
+  the rest; and the palette's Settings action shows its shortcut ("Ctrl ,") in the hint column. (A dedicated
+  full shortcuts/"?" screen is the heavier alternative, left for later.)*
+- [x] **UX22 — Onboarding is shallow and one-shot** (L67): three tips, no folder choice, not
+  revisitable; the clipboard tip requires a focus event a first-timer won't trigger. *Fixed the "one-shot"
+  core: a **"Show welcome tips again"** button in Settings → About re-opens the welcome/onboarding screen
+  on demand (sets `hasCompletedOnboarding: false`), so it's revisitable (closes **L67**'s revisit half).
+  Onboarding does offer folder choice already (Video/Audio "Choose…"), and it gained the Ctrl+K tip (UX21).
+  The remaining "shallow" (only a few tips) is a content judgment left as-is.*
 - [ ] **UX23 — Settings folder paths are read-only** (L71) — no paste; Browse-dialog only.
 - [x] **UX24 — "Check N watched for new" is disabled with no explanation** when no source is watched —
   a user with indexed (but unwatched) sources sees a dead button. **Fix:** tooltip / enable with a hint to watch a source.

src/renderer/src/App.tsx

@@ -114,13 +114,11 @@ function App(): React.JSX.Element {
   }, [])
 
   // UX16: focus the URL field on launch so the user can paste + type immediately
-  // (Downloads is the default tab). Double-rAF waits for paint, matching the command
+  // (Downloads is the default tab). Double-rAF waits for paint + the DownloadBar to
-  // palette's "New download" focus.
+  // register its focuser (L118), matching the command palette's "New download" focus.
   useEffect(() => {
     if (useNav.getState().tab !== 'downloads') return
-    requestAnimationFrame(() =>
+    requestAnimationFrame(() => requestAnimationFrame(() => useNav.getState().focusUrlField()))
-      requestAnimationFrame(() => document.getElementById('aerofetch-url')?.focus())
-    )
   }, [])
 
   // Promote scheduled ('saved' + a due scheduledFor) items when their time arrives.
@@ -165,7 +163,9 @@ function App(): React.JSX.Element {
       {
         id: 'go-settings',
         label: 'Go to Settings',
-        hint: 'Navigate',
+        // Surface the real shortcut here so the palette doubles as shortcut
+        // discovery (UX21).
+        hint: 'Ctrl ,',
         run: () => setTab('settings')
       },
       {
@@ -174,9 +174,10 @@ function App(): React.JSX.Element {
         hint: 'Focus URL',
         run: () => {
           setTab('downloads')
-          // Double-rAF waits for React's re-render + the browser's paint before focusing.
+          // Double-rAF waits for React's re-render + paint (so the DownloadBar has
+          // mounted and registered its focuser) before requesting focus (L118).
           requestAnimationFrame(() =>
-            requestAnimationFrame(() => document.getElementById('aerofetch-url')?.focus())
+            requestAnimationFrame(() => useNav.getState().focusUrlField())
           )
         }
       },

src/renderer/src/components/DownloadBar.tsx

@@ -24,7 +24,9 @@ import {
   SettingsRegular,
   WindowConsoleRegular
 } from '@fluentui/react-icons'
+import { useEffect, useRef } from 'react'
 import { type MediaKind } from '../store/downloads'
+import { useNav } from '../store/nav'
 import { QUALITY_OPTIONS } from '../qualityOptions'
 import { Select } from './Select'
 import { Hint } from './Hint'
@@ -42,6 +44,14 @@ export function DownloadBar(): React.JSX.Element {
   const styles = useDownloadBarStyles()
   const text = useTextStyles()
   const bar = useDownloadBar()
+  // Register how to focus the URL field so App can request focus (launch / "New
+  // download") without a hardcoded getElementById into this markup (L118).
+  const urlInputRef = useRef<HTMLInputElement>(null)
+  const registerUrlFocuser = useNav((s) => s.registerUrlFocuser)
+  useEffect(() => {
+    registerUrlFocuser(() => urlInputRef.current?.focus())
+    return () => registerUrlFocuser(null)
+  }, [registerUrlFocuser])
   const {
     url,
     kind,
@@ -82,7 +92,7 @@ export function DownloadBar(): React.JSX.Element {
       <div className={styles.urlRow}>
         <Input
           className={styles.url}
-          input={{ id: 'aerofetch-url', 'aria-label': 'Video or playlist URL' }}
+          input={{ ref: urlInputRef, 'aria-label': 'Video or playlist URL' }}
           value={url}
           onChange={(_, d) => bar.onUrlChange(d.value)}
           onKeyDown={(e) => {

src/renderer/src/components/Onboarding.tsx

@@ -18,7 +18,8 @@ import {
   RocketRegular,
   FolderRegular,
   MusicNote2Regular,
-  VideoClipRegular
+  VideoClipRegular,
+  KeyboardRegular
 } from '@fluentui/react-icons'
 import { useSettings } from '../store/settings'
 import { SPACE, ICON } from './ui/tokens'
@@ -128,6 +129,10 @@ const TIPS: { icon: React.JSX.Element; text: string }[] = [
   {
     icon: <OptionsRegular />,
     text: 'Subtitles, SponsorBlock, custom yt-dlp commands, and more live in Settings.'
+  },
+  {
+    icon: <KeyboardRegular />,
+    text: 'Press Ctrl+K anytime to jump to any screen or start a new download.'
   }
 ]
 

src/renderer/src/components/settings/AboutCard.tsx

@@ -100,6 +100,12 @@ export function AboutCard(): React.JSX.Element {
         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}>
+        {/* Re-show the first-run welcome/tips screen on demand (UX22). */}
+        <Button size="small" onClick={() => update({ hasCompletedOnboarding: false })}>
+          Show welcome tips again
+        </Button>
+      </div>
 
       <Field
         label="Keep yt-dlp updated automatically"

src/renderer/src/components/settings/AppearanceCard.tsx

@@ -1,3 +1,4 @@
+import { useRef } from 'react'
 import { Field, Button, Card, Subtitle2, Caption1, mergeClasses } from '@fluentui/react-components'
 import { PaintBucketRegular, AccessibilityRegular } from '@fluentui/react-icons'
 import { type ThemeMode, type AccentColor } from '@shared/ipc'
@@ -5,6 +6,7 @@ import { useSettings } from '../../store/settings'
 import { useSystemTheme } from '../../store/systemTheme'
 import { Select } from '../Select'
 import { ACCENT_OPTIONS } from '../../theme'
+import { useFocusStyles } from '../ui/focusRing'
 import { useSettingsStyles } from './settingsStyles'
 
 const THEME_MODE_OPTIONS = [
@@ -15,11 +17,31 @@ const THEME_MODE_OPTIONS = [
 
 export function AppearanceCard(): React.JSX.Element {
   const styles = useSettingsStyles()
+  const focus = useFocusStyles()
   const theme = useSettings((s) => s.theme)
   const accentColor = useSettings((s) => s.accentColor)
   const highContrast = useSystemTheme((s) => s.shouldUseHighContrastColors)
   const update = useSettings((s) => s.update)
 
+  // Roving-tabindex arrow-key navigation for the accent radiogroup (L155), so the
+  // single-select swatches behave like the Theme radio pattern rather than a row
+  // of plain buttons.
+  const swatchRefs = useRef<(HTMLButtonElement | null)[]>([])
+  function onSwatchKey(e: React.KeyboardEvent, index: number): void {
+    const n = ACCENT_OPTIONS.length
+    let next = -1
+    if (e.key === 'ArrowRight' || e.key === 'ArrowDown') next = (index + 1) % n
+    else if (e.key === 'ArrowLeft' || e.key === 'ArrowUp') next = (index - 1 + n) % n
+    else if (e.key === 'Home') next = 0
+    else if (e.key === 'End') next = n - 1
+    else return
+    const opt = ACCENT_OPTIONS[next]
+    if (!opt) return
+    e.preventDefault()
+    update({ accentColor: opt.value as AccentColor })
+    swatchRefs.current[next]?.focus()
+  }
+
   return (
     <Card className={styles.card}>
       <div className={styles.sectionHeader}>
@@ -36,21 +58,34 @@ export function AppearanceCard(): React.JSX.Element {
       </Field>
 
       <Field label="Accent color">
-        <div className={styles.swatchRow}>
+        <div className={styles.swatchRow} role="radiogroup" aria-label="Accent color">
-          {ACCENT_OPTIONS.map((opt) => (
+          {ACCENT_OPTIONS.map((opt, i) => {
-            <button
+            const selected = accentColor === opt.value
-              key={opt.value}
+            return (
-              type="button"
+              <button
-              className={mergeClasses(
+                key={opt.value}
-                styles.swatch,
+                ref={(el) => {
-                accentColor === opt.value && styles.swatchActive
+                  swatchRefs.current[i] = el
-              )}
+                }}
-              style={{ backgroundColor: opt.swatch }}
+                type="button"
-              onClick={() => update({ accentColor: opt.value as AccentColor })}
+                role="radio"
-              aria-label={`${opt.label}${accentColor === opt.value ? ' (selected)' : ''}`}
+                aria-checked={selected}
-              title={opt.label}
+                // Roving tabindex: only the selected swatch is a tab stop; arrows
-            />
+                // move within the group (L155).
-          ))}
+                tabIndex={selected ? 0 : -1}
+                className={mergeClasses(
+                  styles.swatch,
+                  selected && styles.swatchActive,
+                  focus.focusRing
+                )}
+                style={{ backgroundColor: opt.swatch }}
+                onClick={() => update({ accentColor: opt.value as AccentColor })}
+                onKeyDown={(e) => onSwatchKey(e, i)}
+                aria-label={opt.label}
+                title={opt.label}
+              />
+            )
+          })}
         </div>
       </Field>
 

src/renderer/src/store/nav.ts

@@ -17,6 +17,15 @@ interface NavState {
   openLibraryWith: (url: string) => void
   /** Read and clear the staged Library URL (returns null if none is pending). */
   consumeLibraryUrl: () => string | null
+  /**
+   * The DownloadBar registers a focuser for its URL field here (L118), so App can
+   * ask for focus (on launch / "New download") without reaching into the DOM by a
+   * hardcoded element id. The DownloadBar owns *how* it focuses (its own ref);
+   * callers just call `focusUrlField()`.
+   */
+  urlFocuser: (() => void) | null
+  registerUrlFocuser: (fn: (() => void) | null) => void
+  focusUrlField: () => void
 }
 
 export const useNav = create<NavState>((set, get) => ({
@@ -28,5 +37,8 @@ export const useNav = create<NavState>((set, get) => ({
     const url = get().pendingLibraryUrl
     if (url !== null) set({ pendingLibraryUrl: null })
     return url
-  }
+  },
+  urlFocuser: null,
+  registerUrlFocuser: (fn) => set({ urlFocuser: fn }),
+  focusUrlField: () => get().urlFocuser?.()
 }))