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>

database/migrations/20260512_000112_create_sms_templates.sql

@@ -0,0 +1,9 @@
+CREATE TABLE IF NOT EXISTS sms_templates (
+    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
+    name VARCHAR(200) NOT NULL,
+    body TEXT NOT NULL,
+    is_active TINYINT(1) NOT NULL DEFAULT 1,
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    KEY sms_templates_active_name_idx (is_active, name)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;