Add recurring transactions with monthly confirmation flow

New "Récurrences" section lets users define recurring depense/epargne
models (name, category, default amount, day of month). Nothing is
created automatically: from the day a recurrence is due, it appears
as a pending proposal in Suivi (desktop + mobile) with an editable
amount, so variable bills (electricity, etc.) can be adjusted before
confirming. Dismissing a proposal skips it for the current month
without creating a transaction, and it reappears the following month.

- recurring_transactions table (household/category scoped, active flag,
  last_generated_year/month to prevent duplicate generation)
- transactions.recurring_transaction_id nullable FK to trace origin
- RecurringTransactionPolicy mirrors CategoryPolicy tenant scoping
- 10 new Pest tests covering CRUD, tenant isolation, and the
  pending/confirm/dismiss lifecycle across month boundaries (travelTo)

58/58 tests pass, Pint clean, verified end-to-end against production
data (test recurrence created and cleaned up).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

resources/views/livewire/layout/navigation.blade.php

@@ -83,6 +83,12 @@ new class extends Component
                             </x-dropdown-link>
                         @endif
 
+                        @if (Route::has('recurring'))
+                            <x-dropdown-link :href="route('recurring')" wire:navigate>
+                                {{ __('Récurrences') }}
+                            </x-dropdown-link>
+                        @endif
+
                         <!-- Authentication -->
                         <button wire:click="logout" class="w-full text-start">
                             <x-dropdown-link>
@@ -159,6 +165,12 @@ new class extends Component
                     </x-responsive-nav-link>
                 @endif
 
+                @if (Route::has('recurring'))
+                    <x-responsive-nav-link :href="route('recurring')" wire:navigate>
+                        {{ __('Récurrences') }}
+                    </x-responsive-nav-link>
+                @endif
+
                 <!-- Authentication -->
                 <button wire:click="logout" class="w-full text-start">
                     <x-responsive-nav-link>