* Render the branded page title on the server
The root layout sent a fixed "Mailflare" title and the browser swapped in the configured app name after the page loaded. Screen readers announced both. The title now comes from the branding settings in the first response, and the branding is passed to the provider as its initial value so the name and the icon do not flash their defaults first.
The inbox page also kept its own "Inbox (n)" title after leaving it, so the sign-in page after a logout still read as the inbox. It now puts the previous title back when it unmounts.
* Stub the branding lookup in the layout i18n test
The root layout now reads the app name from the server, which pulls in the Workers runtime. The i18n test bundles the layout with stubs for its server-only imports, so add one for the branding helper too.
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Co-authored-by: Can Kirca <9063990+cankirca@users.noreply.github.com>
