feat(v5): add Inertia app shell with Flux health

Adds v5 routing, middleware, home page rendering, team context sharing,
project model/table support, and Flux health reporting. Installs Flux in
container builds with role-aware s6 services and documents runtime roles.

app/Http/Kernel.php

@@ -18,6 +18,8 @@ use App\Http\Middleware\RedirectIfAuthenticated;
 use App\Http\Middleware\TrimStrings;
 use App\Http\Middleware\TrustHosts;
 use App\Http\Middleware\TrustProxies;
+use App\Http\Middleware\V5\EnsureCurrentTeam as V5EnsureCurrentTeam;
+use App\Http\Middleware\V5\HandleInertiaRequests as V5HandleInertiaRequests;
 use App\Http\Middleware\ValidateSignature;
 use App\Http\Middleware\VerifyCsrfToken;
 use Illuminate\Auth\Middleware\AuthenticateWithBasicAuth;
@@ -76,6 +78,22 @@ class Kernel extends HttpKernel
 
         ],
 
+        'v5.web' => [
+            EncryptCookies::class,
+            AddQueuedCookiesToResponse::class,
+            StartSession::class,
+            ShareErrorsFromSession::class,
+            VerifyCsrfToken::class,
+            SubstituteBindings::class,
+            V5HandleInertiaRequests::class,
+        ],
+
+        'v5.authenticated' => [
+            'auth',
+            'verified',
+            V5EnsureCurrentTeam::class,
+        ],
+
         'api' => [
             // \Laravel\Sanctum\Http\Middleware\EnsureFrontendRequestsAreStateful::class,
             ThrottleRequests::class.':api',