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/backup.ts

@@ -3,7 +3,7 @@ import { readFileSync, writeFileSync } from 'fs'
 import { getSettings, setSettings, SECRET_KEYS } from './settings'
 import { migrateSettingsKeys } from './settingsMigration'
 import { listTemplates, replaceTemplates } from './templates'
-import { isTemplateLike } from './validation'
+import { isTemplateLike } from './core/validation'
 import type { BackupExportResult, BackupImportResult, Settings, CommandTemplate } from '@shared/ipc'
 
 interface BackupFile {