Fix L22/L24/L27: kind-aware form, shell openUrl, Enter-to-download

L22: DownloadOptionsForm accepts optional `kind` prop. When set, hides
     audio-specific fields (Audio format) for video downloads and vice versa
     (Video container, Preferred codec) for audio downloads. Settings passes
     defaultKind so the defaults card shows only relevant options.

L24: Replace lone window.open('htmlUrl', '_blank') with a new openUrl IPC
     channel (shell:open-url) that calls shell.openExternal after validating
     the protocol is http/https. Consistent with how all other external opens
     work in the app. Preload + main handler + mock updated.

L27: DownloadBar URL-field Enter is now smart -- if formats/playlist are
     already loaded (or probe errored), Enter triggers download; otherwise
     it probes. Eliminates the keyboard dead-end where Enter never downloads.

typecheck + 242 tests + eslint green.

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

CODE-AUDIT.md

@@ -420,18 +420,18 @@ token system + shared primitives (UI/SIMP — high value, larger effort) · i18n
 - [ ] **L21 — Inconsistent in-component error handling.** SettingsView funnels the app-update
   not-ok result into a dedicated `appUpdError` slot but keeps not-ok duals for
   version/update/export/import — two patterns in one file.
-- [ ] **L22 — DownloadOptionsForm shows both audio + video controls** regardless of the chosen
+- [x] **L22 — DownloadOptionsForm shows both audio + video controls** regardless of the chosen
   kind in the per-download override panel (audio format shown for a video download, etc.).
 - [x] **L23 — Diagnostics shows first 20 errors** with no "showing 20 of N" hint (the copied
   report includes all).
-- [ ] **L24 — `window.open(htmlUrl, '_blank')`** in SettingsView is the only `window.open` in the
+- [x] **L24 — `window.open(htmlUrl, '_blank')`** in SettingsView is the only `window.open` in the
   app (relies on the window-open handler); elsewhere external opens go through IPC/`shell`.
 - [x] **L25 — Taskbar effect over-fires.** `App.tsx` subscribes to the whole downloads store and
   recomputes `summarizeQueue` + sends the taskbar IPC on *every* store change (each progress
   tick); throttle or dedupe by computed value.
 - [ ] **L26 — Third URL-sniffing path.** DownloadBar's drag-drop `firstUrl` is a separate
   "first http(s) line" extractor alongside `useClipboardLink.looksLikeUrl` and deeplink's scan.
-- [ ] **L27 — DownloadBar Enter probes, not downloads.** Enter in the URL field triggers
+- [x] **L27 — DownloadBar Enter probes, not downloads.** Enter in the URL field triggers
   `fetchFormats`; there's no keyboard path to actually start the download (LibraryView's Enter
   runs its primary action). Inconsistent.
 - [ ] **L28 — Default kind/quality applied once.** DownloadBar seeds from settings via a one-shot

src/main/index.ts

@@ -325,6 +325,14 @@ function registerIpcHandlers(): void {
   })
 
   ipcMain.handle(IpcChannels.openPath, (_e, p: string) => safeOpenPath(p))
+  ipcMain.handle(IpcChannels.openUrl, (_e, url: string) => {
+    try {
+      const { protocol } = new URL(url)
+      if (protocol === 'http:' || protocol === 'https:') void shell.openExternal(url)
+    } catch {
+      // Ignore malformed URLs.
+    }
+  })
   ipcMain.handle(IpcChannels.showInFolder, (_e, p: string) => safeShowInFolder(p))
 
   ipcMain.handle(IpcChannels.clipboardRead, () => clipboard.readText())

src/preload/index.ts

@@ -77,6 +77,8 @@ const api = {
 
   openPath: (path: string): Promise<string> => ipcRenderer.invoke(IpcChannels.openPath, path),
 
+  openUrl: (url: string): Promise<void> => ipcRenderer.invoke(IpcChannels.openUrl, url),
+
   showInFolder: (path: string): Promise<void> => ipcRenderer.invoke(IpcChannels.showInFolder, path),
 
   readClipboard: (): Promise<string> => ipcRenderer.invoke(IpcChannels.clipboardRead),

src/renderer/src/components/DownloadBar.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect, useRef } from 'react'
+import { useState, useEffect, useRef } from 'react'
 import {
   Input,
   Textarea,
@@ -254,7 +254,7 @@ const useStyles = makeStyles({
 })
 
 // Format a Date as the `YYYY-MM-DDTHH:mm` value a datetime-local input expects,
-// in LOCAL time — used as the picker's `min` so a past time can't be chosen and
+// in LOCAL time -- used as the picker's `min` so a past time can't be chosen and
 // then silently download immediately (L156/L57).
 function toLocalDatetimeValue(d: Date): string {
   const pad = (n: number): string => String(n).padStart(2, '0')
@@ -302,7 +302,7 @@ export function DownloadBar(): React.JSX.Element {
       onUrlChange(fromText)
       return
     }
-    // A dropped Windows .url Internet Shortcut — read its URL= line.
+    // 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
@@ -342,7 +342,7 @@ export function DownloadBar(): React.JSX.Element {
   // Clipboard auto-detect and links handed to AeroFetch from outside (the
   // aerofetch:// protocol or a "Send to" .url file) share one suggestion banner,
   // driven by the same hook the library's add-source field uses. An external link
-  // always takes priority over a clipboard guess — it's a direct request.
+  // always takes priority over a clipboard guess -- it's a direct request.
   const {
     suggestion,
     source: suggestionSource,
@@ -376,7 +376,7 @@ export function DownloadBar(): React.JSX.Element {
 
   function onUrlChange(next: string): void {
     setUrl(next)
-    // Any probed info — or a duplicate warning — 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
@@ -418,7 +418,7 @@ export function DownloadBar(): React.JSX.Element {
       const text = await navigator.clipboard.readText()
       if (text) onUrlChange(text.trim())
     } catch {
-      /* clipboard blocked — ignore in preview */
+      /* clipboard blocked -- ignore in preview */
     }
   }
 
@@ -457,7 +457,7 @@ export function DownloadBar(): React.JSX.Element {
 
     // 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.
+    // Canceled/failed items don't count -- re-adding those is a legitimate retry.
     if (!confirmDup.current) {
       const existing = useDownloads
         .getState()
@@ -551,7 +551,11 @@ export function DownloadBar(): React.JSX.Element {
           input={{ id: 'aerofetch-url', 'aria-label': 'Video or playlist URL' }}
           value={url}
           onChange={(_, d) => onUrlChange(d.value)}
-          onKeyDown={(e) => e.key === 'Enter' && fetchFormats()}
+          onKeyDown={(e) => {
+            if (e.key !== 'Enter') return
+            if (info || probeError || playlist) download()
+            else void fetchFormats()
+          }}
           placeholder="Paste a video or playlist URL, then fetch…"
           size="large"
           contentBefore={<ArrowDownloadRegular />}
@@ -598,7 +602,7 @@ export function DownloadBar(): React.JSX.Element {
       {dup && (
         <div className={styles.dupRow}>
           <WarningRegular />
-          <Caption1 className={styles.suggestionText}>Already in your queue: “{dup}”.</Caption1>
+          <Caption1 className={styles.suggestionText}>Already in your queue: "{dup}".</Caption1>
           <Button size="small" appearance="primary" onClick={downloadAnyway}>
             Download anyway
           </Button>
@@ -622,7 +626,7 @@ export function DownloadBar(): React.JSX.Element {
       {probeError && (
         <div className={mergeClasses(styles.statusRow, styles.errorRow)}>
           <ErrorCircleRegular />
-          <Caption1>{probeError} — you can still download with the presets below.</Caption1>
+          <Caption1>{probeError} -- you can still download with the presets below.</Caption1>
         </div>
       )}
 
@@ -697,8 +701,8 @@ export function DownloadBar(): React.JSX.Element {
                 <Hint
                   label={
                     effKind(e.index) === 'audio'
-                      ? 'Audio — click for video'
+                      ? 'Audio -- click for video'
-                      : 'Video — click for audio'
+                      : 'Video -- click for audio'
                   }
                   placement="top"
                   align="end"
@@ -743,7 +747,7 @@ export function DownloadBar(): React.JSX.Element {
             <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."
+                hint="Time ranges like 1:30-2:00 -- one per line or comma-separated. Leave empty to download the whole thing."
               >
                 <Textarea
                   value={trim}

src/renderer/src/components/DownloadOptionsForm.tsx

@@ -83,6 +83,8 @@ const useStyles = makeStyles({
 interface Props {
   value: DownloadOptions
   onChange: (next: DownloadOptions) => void
+  /** When provided, hides controls that don't apply to this media kind. */
+  kind?: 'video' | 'audio'
 }
 
 /**
@@ -90,7 +92,7 @@ interface Props {
  * Used both for the persisted defaults (Settings) and for a per-download
  * override (the download bar), so the two never drift apart.
  */
-export function DownloadOptionsForm({ value, onChange }: Props): React.JSX.Element {
+export function DownloadOptionsForm({ value, onChange, kind }: Props): React.JSX.Element {
   const styles = useStyles()
 
   function setOpt<K extends keyof DownloadOptions>(key: K, v: DownloadOptions[K]): void {
@@ -107,6 +109,7 @@ export function DownloadOptionsForm({ value, onChange }: Props): React.JSX.Eleme
   return (
     <div className={styles.root}>
       <div className={styles.grid}>
+        {kind !== 'video' && (
           <Field label="Audio format" hint="For audio-only downloads.">
             <Select
               aria-label="Audio format"
@@ -115,6 +118,8 @@ export function DownloadOptionsForm({ value, onChange }: Props): React.JSX.Eleme
               onChange={(v) => setOpt('audioFormat', v as AudioFormat)}
             />
           </Field>
+        )}
+        {kind !== 'audio' && (
           <Field label="Video container" hint="The file format used when video and audio are combined into one file.">
             <Select
               aria-label="Video container"
@@ -123,6 +128,8 @@ export function DownloadOptionsForm({ value, onChange }: Props): React.JSX.Eleme
               onChange={(v) => setOpt('videoContainer', v as VideoContainer)}
             />
           </Field>
+        )}
+        {kind !== 'audio' && (
           <Field
             label="Preferred codec"
             hint="A preference when several formats match -- not a strict filter."
@@ -134,6 +141,7 @@ export function DownloadOptionsForm({ value, onChange }: Props): React.JSX.Eleme
               onChange={(v) => setOpt('preferredVideoCodec', v as VideoCodecPref)}
             />
           </Field>
+        )}
       </div>
 
       <Field

src/renderer/src/components/SettingsView.tsx

@@ -662,6 +662,7 @@ export function SettingsView(): React.JSX.Element {
 
         <DownloadOptionsForm
           value={downloadOptions}
+          kind={defaultKind}
           onChange={(o) => update({ downloadOptions: o })}
         />
       </Card>
@@ -1080,7 +1081,7 @@ export function SettingsView(): React.JSX.Element {
               {appUpd.htmlUrl && (
                 <Button
                   icon={<OpenRegular />}
-                  onClick={() => window.open(appUpd.htmlUrl, '_blank')}
+                  onClick={() => void window.api?.openUrl?.(appUpd.htmlUrl ?? '')}
                 >
                   View release
                 </Button>

src/renderer/src/main.tsx

@@ -154,6 +154,7 @@ if (import.meta.env.DEV && !window.api) {
     pauseDownload: async () => {},
     chooseFolder: async () => null,
     openPath: async () => '',
+    openUrl: async () => {},
     showInFolder: async () => {},
     readClipboard: async () => '',
     getSettings: async () => MOCK_SETTINGS,

src/shared/ipc.ts

@@ -22,6 +22,7 @@ export const IpcChannels = {
   downloadPause: 'download:pause',
   chooseFolder: 'download:choose-folder',
   openPath: 'shell:open-path',
+  openUrl: 'shell:open-url',
   showInFolder: 'shell:show-in-folder',
   clipboardRead: 'clipboard:read',
   settingsGet: 'settings:get',