fix(settings): fix 404 on /settings for root user on cloud instance

- Make Server property nullable in Settings components (Index, Advanced, Updates)
- Add conditional server loading: only load when not on cloud
- Add null checks before using server for DNS validation and proxy configuration
- Fix isInstanceAdmin() to check root team's pivot role directly instead of current team
- Make root team (id=0) bypass subscription check on cloud
- Remove isInstanceAdmin() from main middleware bypass: only settings/admin routes are exempted
- Update isSubscribed() to only check isSubscriptionActive() for navbar consistency

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

app/Http/Middleware/DecideWhatToDoWithUser.php

@@ -19,13 +19,17 @@ class DecideWhatToDoWithUser
         if (auth()?->user()?->currentTeam()) {
             refreshSession(auth()->user()->currentTeam());
         }
-        if (! auth()->user() || ! isCloud() || isInstanceAdmin()) {
+        if (! auth()->user() || ! isCloud()) {
             if (! isCloud() && showBoarding() && ! in_array($request->path(), allowedPathsForBoardingAccounts())) {
                 return redirect()->route('onboarding');
             }
 
             return $next($request);
         }
+        // Instance admins can access settings and admin routes regardless of subscription
+        if (isInstanceAdmin() && (Str::startsWith($request->path(), 'settings') || $request->path() === 'admin')) {
+            return $next($request);
+        }
         if (! auth()->user()->hasVerifiedEmail()) {
             if ($request->path() === 'verify' || in_array($request->path(), allowedPathsForInvalidAccounts()) || $request->routeIs('verify.verify')) {
                 return $next($request);