refactor(renderer): L132 — share resetForm() across download + addPlaylist

Extract the post-enqueue reset (URL + probe + one-shot trim/schedule/advanced/
incognito/options) into resetForm(), called by both download() and addPlaylist().
clearProbe() stays the lighter probe-only reset for onUrlChange. Also fixes a
latent inconsistency: addPlaylist previously left the trim/schedule/advanced
panels open after enqueuing a playlist.

typecheck + eslint + prettier green.

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

src/renderer/src/components/downloadBar/useDownloadBar.ts

@@ -243,6 +243,24 @@ export function useDownloadBar(): DownloadBarController {
     setItemKinds({})
   }
 
+  // Reset the whole bar after a download / playlist is enqueued: clear the URL +
+  // probe and drop the one-shot overrides (trim / schedule / advanced / incognito /
+  // per-download options) so the next download starts from the global defaults.
+  // Shared by download() and addPlaylist() so a playlist add resets the same state
+  // a single download does (L132 — addPlaylist previously left trim/schedule open).
+  function resetForm(): void {
+    setUrl('')
+    setTrim('')
+    setShowTrim(false)
+    setScheduleAt('')
+    setShowSchedule(false)
+    setShowAdvanced(false)
+    setCommandPreview(null)
+    setIncognito(false)
+    setDownloadOptions(DEFAULT_DOWNLOAD_OPTIONS)
+    clearProbe()
+  }
+
   // Fetch (or toggle off) the exact yt-dlp command line for the current form
   // state. The options mirror what download() sends so the preview matches the
   // command that will actually run -- including a probe-selected format and any
@@ -454,19 +472,7 @@ export function useDownloadBar(): DownloadBarController {
       })
     }
 
-    setUrl('')
-    setTrim('')
-    setShowTrim(false)
-    setScheduleAt('')
-    setShowSchedule(false)
-    setShowAdvanced(false)
-    setCommandPreview(null)
-    // Per-download overrides are one-shot (like trim/schedule): reset so the next
-    // download starts from the global defaults, and incognito never silently
-    // carries over to a following download.
-    setIncognito(false)
-    setDownloadOptions(DEFAULT_DOWNLOAD_OPTIONS)
-    clearProbe()
+    resetForm()
   }
 
   function downloadAnyway(): void {
@@ -490,8 +496,7 @@ export function useDownloadBar(): DownloadBarController {
         }
       })
     )
-    setUrl('')
-    clearProbe()
+    resetForm()
   }
 
   return {