feat(audit): Batch 25 — project reorg (CC12), leading DI args (CC7), CC10 by-design

CC12: renderer views/ (5 screens + Onboarding + settings cards) +
lib/ (theme/thumb/datetime/id/qualityOptions/useClipboardLink/queueStats);
main core/ (buildArgs/validation/indexerCore/ytdlpPolicy). git mv preserved
history; all src+test imports updated. Build emits view chunks from views/,
344 tests + typecheck green, live probe rendered all screens.
CC7: wc/onProgress is the leading arg everywhere — downloadAppUpdate(wc,url),
indexSource(onProgress,url,signal), indexSourceCancelable(onProgress,url).
CC10: closed by-design — jsonStore backs all records; settings stay in
electron-store for DPAPI secret encryption (a deliberate two-store split).
Also closes the UI24/W4 context-menu cross-reference.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/main/sync.ts

@@ -7,7 +7,7 @@
 
 import { listSources, listMediaItems } from './sources'
 import { indexSource } from './indexer'
-import { parseRssVideoIds, isYouTubeFeedUrl } from './indexerCore'
+import { parseRssVideoIds, isYouTubeFeedUrl } from './core/indexerCore'
 import { FEED_FETCH_TIMEOUT_MS } from './constants'
 import type { IndexProgress, MediaItem, SyncResult } from '@shared/ipc'
 
@@ -41,7 +41,7 @@ export async function syncWatchedSources(
         if (recent && recent.length > 0 && recent.every((id) => known.has(id))) continue
       }
       const before = new Set(listMediaItems(src.id).map((m) => m.videoId))
-      const res = await indexSource(src.url, onProgress)
+      const res = await indexSource(onProgress, src.url)
       if (res.ok) {
         for (const it of listMediaItems(src.id)) {
           if (!before.has(it.videoId)) newItems.push(it)