feat(audit): Batch 23 — settings key renames with migration (CC1) + config.ts (CC11)

CC1: customCommandEnabled→enableCustomCommands, downloadArchive→
useDownloadArchive, clipboardWatch→watchClipboard, sidebarCollapsed→
isSidebarCollapsed, hardwareAcceleration→useHardwareAcceleration,
videoDir/audioDir→videoFolder/audioFolder (+ chooseDir/clearDir store
actions → chooseFolder/clearFolder). Rename map in settingsMigration.ts
(pure, unit-tested incl. pre-rename backup fixture), applied as an
idempotent on-disk shim at store open and on backup import so old
settings.json and old backups both keep working.

CC11: update host/owner/repo + release API moved to src/main/config.ts.

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

test/pumpBench.test.ts

@@ -57,21 +57,21 @@ function bench(items: DownloadItem[], maxConcurrent: number, iterations: number)
 describe('pump() cost at scale (PERF3)', () => {
   it('a full scan+promote over 5,000 items is well under a millisecond-scale budget', () => {
     const median = bench(makeItems(5_000), 3 + 1_250, 50) // slots open → full pipeline
-     
+
     console.log(`pump pipeline @5k items: median ${median.toFixed(3)} ms`)
     expect(median).toBeLessThan(5)
   })
 
   it('a full scan+promote over 20,000 items stays inside a 5 ms budget', () => {
     const median = bench(makeItems(20_000), 3 + 5_000, 50)
-     
+
     console.log(`pump pipeline @20k items: median ${median.toFixed(3)} ms`)
     expect(median).toBeLessThan(5)
   })
 
   it('the no-free-slot fast path (the per-progress-event case) is trivially cheap', () => {
     const median = bench(makeItems(20_000), 1, 100) // running >= cap → early return
-     
+
     console.log(`pump no-slot path @20k items: median ${median.toFixed(3)} ms`)
     expect(median).toBeLessThan(2)
   })