Add authentication, a public landing page, and guest data preview

Hand-rolled login/register/logout on Laravel's built-in Auth facade
rather than Breeze/Jetstream, which scaffold Tailwind v3 config and
would fight our existing Tailwind v4 CSS-first setup. Login/Register
are Livewire components; logout is a plain POST route (auth-gated,
CSRF-protected).

Routing: "/" is now a public landing page describing the project;
the sites list moved from "/" to "/sites" to make room for it.

Data gating: App\Support\GuestPreview::paginate() forces page 1 and a
5-row page size for unauthenticated visitors on Sites, Discover, and
a site's Pages/Backlinks tables, while total() still reflects the
real match count — authenticated users get the existing full
pagination unchanged. A shared guest-preview-notice component shows
"N of M results, sign in to see all" and only renders when something
is actually being hidden.

Testing: pointed the test suite at a dedicated MySQL database
(huginn_testing) instead of the default in-memory SQLite, since the
existing fulltext index migration isn't SQLite-compatible — this app
is MySQL-specific by now regardless. Added AuthFlowTest (register,
login, wrong-password rejection, logout) and GuestPreviewTest (guest
capped to a preview, authenticated sees everything), all passing.

Also fixed a real bug the tests caught: request()->session() isn't
reliably attached during Livewire's in-process test action calls;
switched Login/Register to the session() helper, which resolves the
session store directly and works in both contexts.

resources/views/livewire/auth/login.blade.php

@@ -0,0 +1,46 @@
+<div class="mx-auto max-w-sm px-4 py-16">
+    <h1 class="text-2xl font-semibold">Log in</h1>
+
+    <form wire:submit="login" class="mt-6 space-y-4">
+        <div>
+            <label for="email" class="block text-sm font-medium text-neutral-700 dark:text-neutral-300">Email</label>
+            <input
+                type="email"
+                id="email"
+                wire:model="email"
+                autofocus
+                autocomplete="username"
+                class="mt-1 w-full rounded-md border border-neutral-300 px-3 py-2 text-sm focus:border-neutral-500 focus:outline-none dark:border-neutral-700 dark:bg-neutral-900"
+            >
+            @error('email') <p class="mt-1 text-sm text-red-600 dark:text-red-400">{{ $message }}</p> @enderror
+        </div>
+
+        <div>
+            <label for="password" class="block text-sm font-medium text-neutral-700 dark:text-neutral-300">Password</label>
+            <input
+                type="password"
+                id="password"
+                wire:model="password"
+                autocomplete="current-password"
+                class="mt-1 w-full rounded-md border border-neutral-300 px-3 py-2 text-sm focus:border-neutral-500 focus:outline-none dark:border-neutral-700 dark:bg-neutral-900"
+            >
+            @error('password') <p class="mt-1 text-sm text-red-600 dark:text-red-400">{{ $message }}</p> @enderror
+        </div>
+
+        <label class="flex items-center gap-2 text-sm text-neutral-600 dark:text-neutral-400">
+            <input type="checkbox" wire:model="remember" class="rounded border-neutral-300 dark:border-neutral-700">
+            Remember me
+        </label>
+
+        <button
+            type="submit"
+            class="w-full rounded-md bg-neutral-900 px-4 py-2 text-sm font-medium text-white hover:bg-neutral-700 dark:bg-white dark:text-neutral-900 dark:hover:bg-neutral-200"
+        >
+            Log in
+        </button>
+    </form>
+
+    <p class="mt-6 text-sm text-neutral-500">
+        Don't have an account? <a href="{{ route('register') }}" class="text-blue-600 hover:underline dark:text-blue-400">Sign up</a>.
+    </p>
+</div>

resources/views/livewire/auth/register.blade.php

@@ -0,0 +1,64 @@
+<div class="mx-auto max-w-sm px-4 py-16">
+    <h1 class="text-2xl font-semibold">Create an account</h1>
+
+    <form wire:submit="register" class="mt-6 space-y-4">
+        <div>
+            <label for="name" class="block text-sm font-medium text-neutral-700 dark:text-neutral-300">Name</label>
+            <input
+                type="text"
+                id="name"
+                wire:model="name"
+                autofocus
+                autocomplete="name"
+                class="mt-1 w-full rounded-md border border-neutral-300 px-3 py-2 text-sm focus:border-neutral-500 focus:outline-none dark:border-neutral-700 dark:bg-neutral-900"
+            >
+            @error('name') <p class="mt-1 text-sm text-red-600 dark:text-red-400">{{ $message }}</p> @enderror
+        </div>
+
+        <div>
+            <label for="email" class="block text-sm font-medium text-neutral-700 dark:text-neutral-300">Email</label>
+            <input
+                type="email"
+                id="email"
+                wire:model="email"
+                autocomplete="username"
+                class="mt-1 w-full rounded-md border border-neutral-300 px-3 py-2 text-sm focus:border-neutral-500 focus:outline-none dark:border-neutral-700 dark:bg-neutral-900"
+            >
+            @error('email') <p class="mt-1 text-sm text-red-600 dark:text-red-400">{{ $message }}</p> @enderror
+        </div>
+
+        <div>
+            <label for="password" class="block text-sm font-medium text-neutral-700 dark:text-neutral-300">Password</label>
+            <input
+                type="password"
+                id="password"
+                wire:model="password"
+                autocomplete="new-password"
+                class="mt-1 w-full rounded-md border border-neutral-300 px-3 py-2 text-sm focus:border-neutral-500 focus:outline-none dark:border-neutral-700 dark:bg-neutral-900"
+            >
+            @error('password') <p class="mt-1 text-sm text-red-600 dark:text-red-400">{{ $message }}</p> @enderror
+        </div>
+
+        <div>
+            <label for="password_confirmation" class="block text-sm font-medium text-neutral-700 dark:text-neutral-300">Confirm password</label>
+            <input
+                type="password"
+                id="password_confirmation"
+                wire:model="password_confirmation"
+                autocomplete="new-password"
+                class="mt-1 w-full rounded-md border border-neutral-300 px-3 py-2 text-sm focus:border-neutral-500 focus:outline-none dark:border-neutral-700 dark:bg-neutral-900"
+            >
+        </div>
+
+        <button
+            type="submit"
+            class="w-full rounded-md bg-neutral-900 px-4 py-2 text-sm font-medium text-white hover:bg-neutral-700 dark:bg-white dark:text-neutral-900 dark:hover:bg-neutral-200"
+        >
+            Sign up
+        </button>
+    </form>
+
+    <p class="mt-6 text-sm text-neutral-500">
+        Already have an account? <a href="{{ route('login') }}" class="text-blue-600 hover:underline dark:text-blue-400">Log in</a>.
+    </p>
+</div>

resources/views/livewire/discover/search.blade.php

@@ -69,6 +69,12 @@
     </div>
 
     <div class="mt-4">
-        {{ $sites->links() }}
+        @auth
+            {{ $sites->links() }}
+        @else
+            @if ($hasQuery)
+                <x-guest-preview-notice :paginator="$sites" />
+            @endif
+        @endauth
     </div>
 </div>

resources/views/livewire/sites/index.blade.php

@@ -41,6 +41,10 @@
     </div>
 
     <div class="mt-4">
-        {{ $sites->links() }}
+        @auth
+            {{ $sites->links() }}
+        @else
+            <x-guest-preview-notice :paginator="$sites" />
+        @endauth
     </div>
 </div>