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/ffmpeg.ts

@@ -1,6 +1,7 @@
 import { execFile } from 'child_process'
 import { existsSync } from 'fs'
 import { getFfmpegPath, getFfprobePath } from './binaries'
+import { VERSION_TIMEOUT_MS } from './constants'
 import type { FfmpegVersionResult } from '@shared/ipc'
 
 /**
@@ -14,15 +15,20 @@ import type { FfmpegVersionResult } from '@shared/ipc'
 function readToolVersion(path: string): Promise<string | null> {
   if (!existsSync(path)) return Promise.resolve(null)
   return new Promise((resolve) => {
-    execFile(path, ['-version'], { windowsHide: true, timeout: 15_000 }, (err, stdout) => {
-      if (err) {
-        resolve(null)
-        return
+    execFile(
+      path,
+      ['-version'],
+      { windowsHide: true, timeout: VERSION_TIMEOUT_MS },
+      (err, stdout) => {
+        if (err) {
+          resolve(null)
+          return
+        }
+        const firstLine = stdout.split('\n', 1)[0] ?? ''
+        const m = firstLine.match(/version\s+(\S+)/i)
+        resolve(m?.[1] ?? null)
       }
-      const firstLine = stdout.split('\n', 1)[0] ?? ''
-      const m = firstLine.match(/version\s+(\S+)/i)
-      resolve(m?.[1] ?? null)
-    })
+    )
   })
 }