## Summary
- Implement dynamic imports for internationalization (i18n) locale files
to reduce initial bundle size
- Only load English locale eagerly as default/fallback, load other
locales on-demand
- Apply code splitting to both main ComfyUI frontend and desktop-ui
applications
## Technical Details
- **Before**: All locale files (main.json, nodeDefs.json, commands.json,
settings.json) for all 9 languages were bundled in the initial
JavaScript bundle
- **After**: Only English locale files are included in initial bundle,
other locales are loaded dynamically when needed
- Implemented `loadLocale()` function that uses dynamic imports with
`Promise.all()` for efficient parallel loading
- Added locale tracking with `loadedLocales` Set to prevent duplicate
loading
- Updated both `src/i18n.ts` and `apps/desktop-ui/src/i18n.ts` with
consistent implementation
## Bundle Size Impact
This change significantly reduces the initial bundle size by removing ~8
languages worth of JSON locale data from the main bundle. Locale files
are now loaded on-demand only when users switch languages.
## Implementation
- Uses dynamic imports: `import('./locales/[locale]/[file].json')`
- Maintains backward compatibility with existing locale switching
mechanism
- Graceful error handling for unsupported locales
- No breaking changes to the public API
## Test plan
- [x] Verify initial load only includes English locale
- [x] Test dynamic locale loading when switching languages in settings
- [x] Confirm fallback behavior for unsupported locales
- [x] Validate both web and desktop-ui applications work correctly
🤖 Generated with [Claude Code](https://claude.ai/code)
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6076-feat-implement-dynamic-imports-for-locale-code-splitting-28d6d73d36508189ae0ef060804a5cee)
by [Unito](https://www.unito.io)
---------
Co-authored-by: Claude <noreply@anthropic.com>
## Summary
Extracts desktop UI into apps/desktop-ui package with minimal changes.
## Changes
- **What**:
- Separates desktop-specific code into standalone package with
independent Vite config, router, and i18n
- Drastically simplifies the main app router by removing all desktop
routes
- Adds a some code duplication, most due to the existing design
- Some duplication can be refactored to be *simpler* on either side - no
need to split things by `isElectron()`
- Rudimentary storybook support has been added
- **Breaking**: Stacked PR for publishing must be merged before this PR
makes it to stable core (but publishing _could_ be done manually)
- #5915
- **Dependencies**: Takes full advantage of pnpm catalog. No additional
dependencies added.
## Review Focus
- Should be no changes to normal frontend operation
- Scripts added to root package.json are acceptable
- The duplication in this PR is copied as is, wherever possible. Any
corrections or fix-ups beyond the scope of simply migrating the
functionality as-is, can be addressed in later PRs. That said, if any
changes are made, it instantly becomes more difficult to separate the
duplicated code out into a shared utility.
- Tracking issue to address concerns: #5925
### i18n
Fixing i18n is out of scope for this PR. It is a larger task that we
should consider carefully and implement properly. Attempting to isolate
the desktop i18n and duplicate the _current_ localisation scripts would
be wasted energy.
