Add admin page to list and revoke Micropub tokens

Gives a way to actually use the revocation capability built up over
the last few commits from the admin side, not just self-service via
the client. Lists client_id/scope/issue time per token (never the raw
token itself, since only its hash is stored) with a revoke button for
active ones.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014625MfkGZ7GVdbqKme4a8L

resources/views/admin/tokens/index.blade.php

@@ -0,0 +1,27 @@
+@extends('master')
+
+@section('title')List Tokens « Admin CP « @stop
+
+@section('content')
+    <h1>Micropub Tokens</h1>
+    @if($tokens->isEmpty())
+        <p>No tokens have been issued.</p>
+    @else
+        <ul>
+        @foreach($tokens as $token)
+            <li>
+                {{ $token->client_id }} — scope: {{ $token->scope }} — issued {{ $token->created_at->diffForHumans() }}
+                @if($token->isRevoked)
+                    — revoked {{ $token->revoked_at->diffForHumans() }}
+                @else
+                    <form action="/admin/tokens/{{ $token->id }}/revoke" method="post" style="display:inline">
+                        {{ csrf_field() }}
+                        {{ method_field('PUT') }}
+                        <button type="submit" name="revoke">Revoke</button>
+                    </form>
+                @endif
+            </li>
+        @endforeach
+        </ul>
+    @endif
+@stop