fix(settings): restore budgets settings redirect (#228)

## Summary
- restore the legacy `/settings/budgets` route as a redirect to
`/budgets` so old settings links no longer trigger a missing Inertia
page
- add a feature test covering the redirect to prevent the broken route
from resurfacing

## Testing
- php artisan test --compact
tests/Feature/Settings/BudgetSettingsRedirectTest.php

routes/settings.php

@@ -47,6 +47,8 @@ Route::middleware('auth')->group(function () {
     Route::patch('settings/labels/{label}', [LabelController::class, 'update'])->name('labels.update');
     Route::delete('settings/labels/{label}', [LabelController::class, 'destroy'])->name('labels.destroy');
 
+    Route::redirect('settings/budgets', '/budgets')->name('budgets.settings');
+
     Route::get('settings/automation-rules', [\App\Http\Controllers\Settings\AutomationRuleController::class, 'index'])->name('automation-rules.index');
     Route::post('settings/automation-rules', [\App\Http\Controllers\Settings\AutomationRuleController::class, 'store'])->name('automation-rules.store');
     Route::patch('settings/automation-rules/{automationRule}', [\App\Http\Controllers\Settings\AutomationRuleController::class, 'update'])->name('automation-rules.update');

tests/Feature/Settings/BudgetSettingsRedirectTest.php

@@ -0,0 +1,16 @@
+<?php
+
+use App\Models\User;
+
+use function Pest\Laravel\actingAs;
+use function Pest\Laravel\get;
+
+test('settings budgets route redirects to the budgets index page', function () {
+    $user = User::factory()->create(['onboarded_at' => now()]);
+
+    actingAs($user);
+
+    $response = get(route('budgets.settings'));
+
+    $response->assertRedirect(route('budgets.index'));
+});