feat(124): sms templates CRUD + order picker

- Nowa tabela sms_templates (name + body + is_active) + minimalny CRUD.
- /settings/sms-templates: lista + formularz z paleta zmiennych (pill chips).
- Wydzielono Sms\SmsVariableResolver ze wspolna logika placeholderow;
  Email\VariableResolver staje sie cienka fasada — EmailSendingService bez zmian.
- Dropdown "Wybierz szablon" w zakladce SMS na /orders/{id} z fetch
  GET /orders/{id}/sms/template + OrderProAlerts.confirm przy nadpisaniu.
- Stopka SMSPLANET dalej doklejana wylacznie przez SmsConversationService
  (Phase 122 contract preserved).
- Sidebar Ustawien: nowy link "Szablony SMS".

Migration: 20260512_000112_create_sms_templates.sql (CREATE TABLE).

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

public/assets/js/modules/sms-template-picker.js

@@ -0,0 +1,96 @@
+(function () {
+  'use strict';
+
+  if (window.__smsTemplatePickerBound) return;
+  window.__smsTemplatePickerBound = true;
+
+  function findTarget(picker) {
+    var targetId = picker.getAttribute('data-message-target');
+    if (!targetId) return null;
+    return document.getElementById(targetId);
+  }
+
+  function applyBody(textarea, body) {
+    textarea.value = body;
+    textarea.dispatchEvent(new Event('input', { bubbles: true }));
+    textarea.focus();
+  }
+
+  function bind(picker) {
+    if (picker.dataset.smsPickerBound === '1') return;
+    picker.dataset.smsPickerBound = '1';
+
+    picker.addEventListener('change', function () {
+      var templateId = parseInt(picker.value, 10);
+      var orderId = parseInt(picker.getAttribute('data-order-id'), 10);
+      if (!templateId || !orderId) {
+        return;
+      }
+      var textarea = findTarget(picker);
+      if (!textarea) {
+        picker.value = '';
+        return;
+      }
+
+      var doFetch = function () {
+        picker.disabled = true;
+        fetch('/orders/' + orderId + '/sms/template?template_id=' + templateId, {
+          headers: { 'Accept': 'application/json' },
+          credentials: 'same-origin'
+        })
+          .then(function (r) { return r.json(); })
+          .then(function (data) {
+            if (data && data.ok && typeof data.body === 'string') {
+              applyBody(textarea, data.body);
+            } else if (window.OrderProAlerts && window.OrderProAlerts.alert) {
+              window.OrderProAlerts.alert({
+                title: 'Nie udalo sie wczytac szablonu',
+                message: (data && data.error) ? String(data.error) : 'Sprobuj ponownie.'
+              });
+            }
+          })
+          .catch(function () {})
+          .finally(function () {
+            picker.disabled = false;
+            picker.value = '';
+          });
+      };
+
+      var current = (textarea.value || '').trim();
+      if (current === '') {
+        doFetch();
+        return;
+      }
+
+      if (window.OrderProAlerts && typeof window.OrderProAlerts.confirm === 'function') {
+        var triggered = false;
+        var run = function () { if (!triggered) { triggered = true; doFetch(); } };
+        var result = window.OrderProAlerts.confirm({
+          title: 'Zamiana tresci',
+          message: 'Tekst w polu wiadomosci zostanie nadpisany trescia szablonu. Kontynuowac?',
+          confirmLabel: 'Wstaw szablon',
+          danger: false,
+          onConfirm: run,
+          onCancel: function () { picker.value = ''; }
+        });
+        if (result && typeof result.then === 'function') {
+          result.then(function (ok) { if (ok) run(); else picker.value = ''; });
+        }
+      } else if (window.confirm('Tekst w polu wiadomosci zostanie nadpisany. Kontynuowac?')) {
+        doFetch();
+      } else {
+        picker.value = '';
+      }
+    });
+  }
+
+  function init() {
+    document.querySelectorAll('[data-sms-template-picker]').forEach(bind);
+  }
+
+  if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', init);
+  } else {
+    init();
+  }
+})();