Fix L46/L71/L74: unify yt-dlp missing message, editable dir inputs, swatch a11y

L46: Introduced YTDLP_MISSING_MSG constant in binaries.ts. All four callers
     (download, indexer, probe, ytdlp) now emit the same user-facing string:
     "yt-dlp.exe is missing. Open Settings -> Software update to re-download it."
     This removes newline-embedded messages and four divergent phrasings.

L71: Removed readOnly from videoDir/audioDir folder inputs in SettingsView.
     Added onChange handler so users can paste or type a path directly without
     being forced to use the Browse button. The path still flows through
     applySettings() in main, which validates it.

L74: Accent color swatches were triple-labeled (aria-pressed + aria-label +
     title). Replaced with a single aria-label that embeds "(selected)" state,
     plus title for the hover tooltip. Removed the incorrect aria-pressed
     (these are selection buttons, not toggles).

typecheck + 242 tests green.

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

CODE-AUDIT.md

@@ -469,7 +469,7 @@ token system + shared primitives (UI/SIMP — high value, larger effort) · i18n
   but there's no ESLint/Prettier config, script, or dependency — no enforced style tooling.
 - [x] **L45 — Three self-descriptions** drift: pkg `description` "A yt-dlp frontend for Windows" vs
   builder `copyright` "yt-dlp frontend" vs Sidebar caption "yt-dlp frontend".
-- [ ] **L46 — yt-dlp-missing error copy differs across 4 modules** (download/ytdlp/probe/indexer):
+- [x] **L46 — yt-dlp-missing error copy differs across 4 modules** (download/ytdlp/probe/indexer):
   "Reinstall AeroFetch, or drop…" vs "Download it into resources/bin/…" vs "Drop it into resources/bin/."
 - [x] **L47 — `probeMeta` 30s timeout returns null silently** — no surfaced message, unlike every
   other yt-dlp timeout ("Timed out …").
@@ -510,12 +510,12 @@ token system + shared primitives (UI/SIMP — high value, larger effort) · i18n
   (`typeof crypto !== 'undefined'` is always true) — dead defensive branch (see M7). *Fixed with M7: the
   branch now lives once in `newId` (kept so the fn is total in any host) and is covered by a test that stubs
   `crypto` to exercise it.*
-- [ ] **L71 — Settings folder inputs are `readOnly`** with only a Browse button — no way to paste a
+- [x] **L71 — Settings folder inputs are `readOnly`** with only a Browse button — no way to paste a
   known path.
 - [x] **L72 — History re-download drops the thumbnail** (passes only title/channel), so the
   re-queued row loses its thumbnail until re-probed.
 - [ ] **L73 — Two verbs for the same probe action** — DownloadBar "Fetch" vs LibraryView "Index".
-- [ ] **L74 — Accent swatches are triple-labeled** (`aria-pressed` + `aria-label` + `title`).
+- [x] **L74 — Accent swatches are triple-labeled** (`aria-pressed` + `aria-label` + `title`).
 - [x] **L75 — Update-token field always visible** in the Software-update card, even when no update
   is pending — buries an advanced/rarely-needed input.
 - [x] **L76 — Duplicate-warning may show a placeholder title** — `setDup(existing.title)` can be the

src/main/binaries.ts

@@ -80,6 +80,10 @@ export function getFfprobePath(): string {
   return join(getBinDir(), 'ffprobe.exe')
 }
 
+/** User-facing error shown whenever yt-dlp.exe is not found at startup. */
+export const YTDLP_MISSING_MSG =
+  'yt-dlp.exe is missing. Open Settings → Software update to re-download it.'
+
 /** Optional bundled external downloader; absent unless dropped into resources/bin. */
 export function getAria2cPath(): string {
   return join(getBinDir(), 'aria2c.exe')

src/main/download.ts

@@ -10,7 +10,8 @@ import {
   getFfmpegPath,
   getFfprobePath,
   getSystem32Path,
-  getAppIconImage
+  getAppIconImage,
+  YTDLP_MISSING_MSG
 } from './binaries'
 import { getSettings, getDownloadArchivePath, getDefaultMediaDir } from './settings'
 import { ensureManagedYtdlp } from './ytdlp'
@@ -225,7 +226,7 @@ export function startDownload(wc: WebContents, opts: StartDownloadOptions): Star
   if (!existsSync(ytdlp)) {
     return {
       ok: false,
-      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).`
+      error: YTDLP_MISSING_MSG
     }
   }
   // ffmpeg is used by nearly every download (merge, audio extract, thumbnail/

src/main/indexer.ts

@@ -11,7 +11,7 @@
 
 import { execFile } from 'child_process'
 import { existsSync } from 'fs'
-import { getYtdlpPath } from './binaries'
+import { getYtdlpPath, YTDLP_MISSING_MSG } from './binaries'
 import { cleanError } from './log'
 import { assertHttpUrl } from './url'
 import {
@@ -90,7 +90,7 @@ export async function indexSource(
     return { ok: false, error: (e as Error).message }
   }
   if (!existsSync(getYtdlpPath())) {
-    return { ok: false, error: 'yt-dlp.exe not found. Drop it into resources/bin/.' }
+    return { ok: false, error: YTDLP_MISSING_MSG }
   }
 
   const cls = classifySource(url)

src/main/probe.ts

@@ -1,6 +1,6 @@
 import { execFile } from 'child_process'
 import { existsSync } from 'fs'
-import { getYtdlpPath } from './binaries'
+import { getYtdlpPath, YTDLP_MISSING_MSG } from './binaries'
 import { fmtBytes } from './lib/formatters'
 import { cleanError } from './log'
 import { assertHttpUrl } from './url'
@@ -115,7 +115,7 @@ export function probeMedia(url: string): Promise<ProbeResult> {
   if (!existsSync(ytdlp)) {
     return Promise.resolve({
       ok: false,
-      error: `yt-dlp.exe not found at ${ytdlp}\nDrop it into resources/bin/ (see the README there).`
+      error: YTDLP_MISSING_MSG
     })
   }
   let target: string

src/main/ytdlp.ts

@@ -1,7 +1,7 @@
 import { execFile } from 'child_process'
 import { existsSync, mkdirSync, copyFileSync } from 'fs'
 import { dirname } from 'path'
-import { getYtdlpPath, getBundledYtdlpPath } from './binaries'
+import { getYtdlpPath, getBundledYtdlpPath, YTDLP_MISSING_MSG } from './binaries'
 import { getSettings, setSettings } from './settings'
 import { shouldAutoCheckYtdlp } from './ytdlpPolicy'
 import {
@@ -39,7 +39,7 @@ export function getYtdlpVersion(): Promise<YtdlpVersionResult> {
   if (!existsSync(ytdlpPath)) {
     return Promise.resolve({
       ok: false,
-      error: `yt-dlp.exe not found at ${ytdlpPath}\nDownload it into resources/bin/ (see the README there).`
+      error: YTDLP_MISSING_MSG
     })
   }
 
@@ -85,7 +85,7 @@ export function updateYtdlp(channel: YtdlpUpdateChannel): Promise<YtdlpUpdateRes
   if (!existsSync(ytdlpPath)) {
     return Promise.resolve({
       ok: false,
-      error: `yt-dlp.exe not found at ${ytdlpPath}\nDownload it into resources/bin/ (see the README there).`
+      error: YTDLP_MISSING_MSG
     })
   }
 

src/renderer/src/components/SettingsView.tsx

@@ -485,11 +485,11 @@ export function SettingsView(): React.JSX.Element {
         >
           <div className={styles.folderRow}>
             <Input
-              readOnly
               className={styles.folderInput}
               value={videoDir}
               placeholder="Documents\Video (default)"
               contentBefore={<FolderRegular />}
+              onChange={(_, d) => update({ videoDir: d.value })}
             />
             <Button icon={<FolderRegular />} onClick={() => chooseDir('videoDir')}>
               Browse
@@ -508,11 +508,11 @@ export function SettingsView(): React.JSX.Element {
         >
           <div className={styles.folderRow}>
             <Input
-              readOnly
               className={styles.folderInput}
               value={audioDir}
               placeholder="Documents\Audio (default)"
               contentBefore={<FolderRegular />}
+              onChange={(_, d) => update({ audioDir: d.value })}
             />
             <Button icon={<FolderRegular />} onClick={() => chooseDir('audioDir')}>
               Browse
@@ -625,8 +625,7 @@ export function SettingsView(): React.JSX.Element {
                 )}
                 style={{ backgroundColor: opt.swatch }}
                 onClick={() => update({ accentColor: opt.value as AccentColor })}
-                aria-pressed={accentColor === opt.value}
-                aria-label={opt.label}
+                aria-label={`${opt.label}${accentColor === opt.value ? ' (selected)' : ''}`}
                 title={opt.label}
               />
             ))}