Add release management enhancements, runtime-aware frontend updates, and extensive test coverage

- Implement release update detection, asset preloading, and frontend version management.
- Add unit and E2E tests for release update workflows, widget behavior, and failure scenarios.
- Introduce new services for handling release ping, error reporting, and update installation workflows.
- Extend i18n for release-related components and error report localization.
- Add `ReleaseFrontendVersionBadge.vue` and related styles to display frontend update statuses.

README.md

@@ -22,6 +22,28 @@ npm install
 npm run dev
 ```
 
+By default, the Vite dev server proxies `/api/*` to the remote stable API at
+`https://api-v2.truckwash.io/master/api`. This lets the Vue app run locally
+without a local PHP API container.
+
+To develop against a local PHP API instead:
+
+```powershell
+$env:VITE_API_PROXY_TARGET="http://localhost"; npm run dev
+```
+
+To use another remote API route:
+
+```powershell
+$env:VITE_API_PROXY_BASE_PATH="/canary/api"; npm run dev
+```
+
+For compatible local gateways that expect the `/api` prefix to be preserved:
+
+```powershell
+$env:VITE_API_PROXY_TARGET="http://localhost"; $env:VITE_API_PROXY_STRIP_PREFIX="false"; npm run dev
+```
+
 ### Compile and Minify for Production
 
 ```sh