Expand Link app with analytics, settings, and custom domains.

Add Bitly-style branded domain support via Ladill Domains SSL API,
account analytics dashboard, settings page with default domain picker,
and fix SSO/dashboard issues from QR Plus template leftovers.

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/2026_06_27_120000_create_link_custom_domains_table.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('link_custom_domains', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('user_id')->constrained()->cascadeOnDelete();
+            $table->string('host')->unique();
+            $table->boolean('include_www')->default(true);
+            $table->boolean('is_default')->default(false);
+            $table->string('status', 16)->default('pending');
+            $table->string('ssl_status', 16)->default('pending');
+            $table->timestamp('dns_verified_at')->nullable();
+            $table->timestamp('ssl_issued_at')->nullable();
+            $table->timestamp('ssl_expires_at')->nullable();
+            $table->text('last_error')->nullable();
+            $table->timestamps();
+
+            $table->index(['user_id', 'is_default']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('link_custom_domains');
+    }
+};