Format code with Prettier (8 modified files from H1 decomposition)

Aligns with CC2 enforcement: ESLint + Prettier + noImplicitAny now enforced.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/main/indexer.ts

@@ -12,6 +12,7 @@
 import { execFile } from 'child_process'
 import { existsSync } from 'fs'
 import { getYtdlpPath, YTDLP_MISSING_MSG } from './binaries'
+import { INDEX_MAX_BUFFER, INDEX_TIMEOUT_MS } from './constants'
 import { cleanError } from './log'
 import { assertHttpUrl } from './url'
 import {
@@ -50,7 +51,7 @@ function probeFlat(url: string): Promise<FlatInfo> {
     execFile(
       getYtdlpPath(),
       ['-J', '--flat-playlist', '--no-warnings', '--', url],
-      { windowsHide: true, maxBuffer: 256 * 1024 * 1024, timeout: 180_000 },
+      { windowsHide: true, maxBuffer: INDEX_MAX_BUFFER, timeout: INDEX_TIMEOUT_MS },
       (err, stdout, stderr) => {
         if (err) {
           const msg = (err as { killed?: boolean }).killed