[i18n] App crashes from parse errors due to incomplete file saves

[breadgrocery]

Describe the bug

Editor autosave (triggered by delays or loss of focus) may save incomplete files if a user pauses to think or switches tabs, leading to parse failures in updateLocalizations during HMR. Uncaught errors in updateLocalizations then cause the whole app to crash, which is undesirable.

Reproduction

Saving incomplete locale files during dev crushes the whole app.

Steps to reproduce

1. Run pnpm dev to start the app
2. Modify and save incomplete locale files (.yaml files for example) which would cause parse error
3. The app crushes

System Info

System:
  OS: Windows 10 10.0.19043
  CPU: (16) x64 AMD Ryzen 7 5800H with Radeon Graphics
  Memory: 10.65 GB / 15.86 GB
Binaries:
  Node: 20.15.0 - D:\nodejs\node.EXE
  npm: 10.8.3 - D:\nodejs\npm.CMD
  pnpm: 9.12.2 - ~\AppData\Local\pnpm\pnpm.CMD
  bun: 1.1.32 - ~\.bun\bin\bun.EXE
Browsers:
  Edge: Spartan (44.19041.1266.0), Chromium (127.0.2651.74)
  Internet Explorer: 11.0.19041.1566
npmPackages:
  wxt: workspace:* => 0.19.13

Used Package Manager

pnpm

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