Mini API: account settings, wallet & support endpoints for the app.

Adds /api/v1/mini account (settings, profile, change-password), wallet (balance
+ ledger, Paystack top-up) and support (Afia chat) endpoints. Account/profile/
password/top-up proxy to the central identity API via a CallsIdentityApi trait;
notifications, wallet balance and support chat are served locally.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/Http/Controllers/Api/Concerns/CallsIdentityApi.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Http\Controllers\Api\Concerns;
+
+use Illuminate\Http\Client\ConnectionException;
+use Illuminate\Http\Client\PendingRequest;
+use Illuminate\Http\Client\Response as HttpResponse;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Validation\ValidationException;
+
+/**
+ * Shared helper for talking to the central Ladill identity API
+ * (auth.ladill.com /api/identity/*) with the first-party service key.
+ */
+trait CallsIdentityApi
+{
+    protected function identity(): PendingRequest
+    {
+        return Http::baseUrl(rtrim((string) config('services.ladill_identity.url'), '/'))
+            ->withToken((string) config('services.ladill_identity.key'))
+            ->connectTimeout(10)
+            ->timeout(20)
+            ->acceptJson()
+            ->asJson();
+    }
+
+    protected function identitySend(string $method, string $path, array $payload): HttpResponse
+    {
+        try {
+            return $this->identity()->send($method, $path, ['json' => $payload]);
+        } catch (ConnectionException) {
+            throw ValidationException::withMessages([
+                'base' => ['Could not reach Ladill. Please try again in a moment.'],
+            ]);
+        }
+    }
+
+    /** Re-throw a 422 from the identity API as local validation errors. */
+    protected function rethrowValidation(HttpResponse $response, string $fallbackField = 'base'): void
+    {
+        if ($response->status() === 422) {
+            throw ValidationException::withMessages(
+                $response->json('errors') ?: [$fallbackField => [$response->json('message') ?: 'Request failed.']],
+            );
+        }
+    }
+}