feat(120): alert component unification

Phase 120 - Plan 01:
- Reusable PHP alert component (resources/views/components/alert.php)
  with inline SVG icon per type, optional dismiss button.
- Missing .alert--info SCSS variant added (#eff6ff/#bfdbfe/#1e3a8a) -
  fixes black-on-white alert after Fakturownia test connection.
- Flash::push(type, message) + Flash::all() with BC for set/get;
  legacy key heuristic (error/.save/warning -> typed entries).
- Central flash renderer in 3 layouts (app/auth/public) iterating
  Flash::all() through component (.alerts-stack wrap).
- Vanilla JS alert-dismiss.js with idempotent guard and delegated
  click handler on [data-alert-dismiss].
- 36 views migrated off inline <div class="alert alert--TYPE">;
  .flash--error/success removed from views (orders/show, shipments/prepare).
- SCSS rebuilt: public/assets/css/{app,login}.css.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

resources/views/settings/accounting-invoice-edit.php

@@ -1,7 +1,7 @@
 <?php
 /** @var array<string, mixed>|null $config */
 $config = is_array($config ?? null) ? $config : null;
-$accounts = is_array($fakturowniaAccounts ?? null) ? $fakturowniaAccounts : [];
+$fakturowniaSettings = is_array($fakturowniaSettings ?? null) ? $fakturowniaSettings : [];
 $isEdit = $config !== null;
 $cid = (int) ($config['id'] ?? 0);
 
@@ -13,8 +13,10 @@ $orderReference = (string) ($config['order_reference'] ?? 'none');
 $paymentToDays = (int) ($config['payment_to_days'] ?? 7);
 $defaultKind = (string) ($config['default_kind'] ?? 'vat');
 $isDelegated = ((int) ($config['is_delegated'] ?? 0)) === 1;
-$integrationId = (int) ($config['integration_id'] ?? 0);
 $isActive = $isEdit ? ((int) ($config['is_active'] ?? 0)) === 1 : true;
+$fakturowniaConfigured = trim((string) ($fakturowniaSettings['account_prefix'] ?? '')) !== ''
+    && !empty($fakturowniaSettings['has_api_token']);
+$fakturowniaActive = !empty($fakturowniaSettings['is_active']);
 
 $success = trim((string) ($successMessage ?? ''));
 $error = trim((string) ($errorMessage ?? ''));
@@ -25,10 +27,10 @@ $error = trim((string) ($errorMessage ?? ''));
   <h2 class="section-title"><?= $isEdit ? 'Edycja konfiguracji faktury' : 'Nowa konfiguracja faktury' ?></h2>
 
   <?php if ($error !== ''): ?>
-    <div class="alert alert--danger mt-12" role="alert"><?= $e($error) ?></div>
+    <div class="mt-12"><?php $type='danger'; $message=(string) $error; $dismissible=true; include dirname(__DIR__) . '/components/alert.php'; ?></div>
   <?php endif; ?>
   <?php if ($success !== ''): ?>
-    <div class="alert alert--success mt-12" role="status"><?= $e($success) ?></div>
+    <div class="mt-12"><?php $type='success'; $message=(string) $success; $dismissible=true; include dirname(__DIR__) . '/components/alert.php'; ?></div>
   <?php endif; ?>
 </section>
 
@@ -105,24 +107,15 @@ $error = trim((string) ($errorMessage ?? ''));
     </div>
 
     <div class="form-field mt-12" data-invoice-delegation<?= $isDelegated ? '' : ' style="display:none"' ?>>
-      <label class="form-field">
-        <span class="field-label">Konto Fakturowni *</span>
-        <select class="form-control" name="integration_id"<?= $isDelegated ? ' required' : '' ?>>
-          <option value="">— wybierz konto —</option>
-          <?php foreach ($accounts as $acc):
-            $aid = (int) ($acc['integration_id'] ?? 0);
-            $accName = (string) ($acc['name'] ?? '');
-            $accPrefix = (string) ($acc['account_prefix'] ?? '');
-          ?>
-            <option value="<?= $aid ?>"<?= $aid === $integrationId ? ' selected' : '' ?>>
-              <?= $e($accName) ?><?= $accPrefix !== '' ? ' (' . $e($accPrefix) . '.fakturownia.pl)' : '' ?>
-            </option>
-          <?php endforeach; ?>
-        </select>
-        <?php if ($accounts === []): ?>
-          <small class="field-hint">Brak skonfigurowanych kont Fakturowni. <a href="/settings/integrations/fakturownia/new">Dodaj konto</a> aby moc delegowac.</small>
-        <?php endif; ?>
-      </label>
+      <span class="field-label">Konto Fakturowni</span>
+      <?php if ($fakturowniaConfigured && $fakturowniaActive): ?>
+        <span class="badge badge--success">Globalna konfiguracja aktywna</span>
+      <?php elseif ($fakturowniaConfigured): ?>
+        <span class="badge badge--muted">Globalna konfiguracja nieaktywna</span>
+      <?php else: ?>
+        <span class="badge badge--muted">Brak konfiguracji</span>
+      <?php endif; ?>
+      <small class="field-hint">Delegowane faktury uzywaja jednej globalnej konfiguracji z <a href="/settings/integrations/fakturownia">Integracje &gt; Fakturownia</a>.</small>
     </div>
 
     <div class="form-actions mt-16">