feat(ui): unify team, security, and notification settings layouts

Extract shared settings-layout components and a dedicated team
danger-zone page. Enable modal editing for security resources,
polish OAuth/API-token controls, and align notification and
service configuration UI with the new navigation patterns.

resources/views/components/application/settings-section.blade.php

@@ -6,11 +6,18 @@
 ])
 
 <section {{ $attributes->merge(['class' => 'application-settings-section']) }}>
-    <header>
-        <div class="flex items-center gap-2">
-            <h3>{{ $title }}</h3>
-            @if ($helper)
-                <x-helper :helper="$helper" />
+    <header @class(['items-start!' => filled($description)])>
+        <div class="min-w-0 py-0.5">
+            <div class="flex items-center gap-2">
+                <h3>{{ $title }}</h3>
+                @if ($helper)
+                    <x-helper :helper="$helper" />
+                @endif
+            </div>
+            @if (filled($description))
+                <p class="mt-0.5 text-xs leading-4 text-neutral-500 dark:text-[var(--coollabs-subtle)]">
+                    {{ $description }}
+                </p>
             @endif
         </div>
         @isset($actions)