track cloud-specific onboarding events and add performance optimizations for hosted cloud app (#6158)

## Summary
- Complete telemetry implementation with circular dependency fix
- Add build performance optimizations from main branch

### Telemetry Features
- ✅ Final telemetry events: signup opened, survey flow, email
verification
- ✅ Onboarding mode to prevent circular dependencies during app
initialization
- ✅ Lazy composable loading with dynamic imports for workflow tracking
- ✅ Survey responses as both event properties and persistent user
properties
- ✅ User identification method for onboarding flow
- ✅ Deferred user property setting until user is authenticated

### Performance Optimizations  
- ✅ Tree-shaking enabled to remove unused code
- ✅ Manual chunk splitting for vendor libraries (primevue, vue, tiptap,
chart.js, etc.)
- ✅ Enhanced esbuild minification with console removal in production
builds
- ✅ GENERATE_SOURCEMAP environment variable control
- ✅ Maintained ImportMap disabled for cloud performance

## Test plan
- [x] Telemetry events track correctly in Mixpanel
- [x] No circular dependency errors on app startup
- [x] Survey responses appear as both event properties and user
properties
- [x] Build optimizations reduce bundle size and improve loading
performance
- [x] All lint/format/typecheck passes

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6158-track-cloud-specific-onboarding-events-and-add-performance-optimizations-for-hosted-cloud-2926d73d365081a7b533dde249d5f734)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Claude <noreply@anthropic.com>

src/locales/en/main.json

@@ -2104,7 +2104,7 @@
       "desc": "Zero setup required. Works on any device.",
       "explain": "Generate multiple outputs at once. Share workflows with ease.",
       "learnAboutButton": "Learn about Cloud",
-      "wantToRun": "Want to run comfyUI locally instead?",
+      "wantToRun": "Want to run ComfyUI locally instead?",
       "download": "Download ComfyUI"
     },
     "checkingStatus": "Checking your account status...",
@@ -2121,7 +2121,7 @@
   "cloudStart_desc": "Zero setup required. Works on any device.",
   "cloudStart_explain": "Generate multiple outputs at once. Share workflows with ease.",
   "cloudStart_learnAboutButton": "Learn about Cloud",
-  "cloudStart_wantToRun": "Want to run comfyUI locally instead?",
+  "cloudStart_wantToRun": "Want to run ComfyUI locally instead?",
   "cloudStart_download": "Download ComfyUI",
   "cloudStart_invited": "YOU'RE INVITED",
   "cloudStart_invited_signin": "Sign in to continue onto Cloud.",