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>

.paul/codebase/db_schema.md

@@ -1,6 +1,6 @@
 # Database Schema
 
-**Updated:** 2026-05-12 | **Total tables:** 60 | **Engine:** InnoDB | **Charset:** utf8mb4_unicode_ci
+**Updated:** 2026-05-12 | **Total tables:** 61 | **Engine:** InnoDB | **Charset:** utf8mb4_unicode_ci
 
 ---
 
@@ -617,6 +617,18 @@ UNIQUE: `(integration_id)` - one global SMSPLANET settings row.
 
 **notifications** - Global notification center (Phase 121): stores type, title, body, target URL, related order/SMS references, `read_at`, and `created_at`. Indexes support unread polling by `(read_at, created_at)` and relation lookups.
 
+**sms_templates** — SMS templates for quick send from order detail (Phase 124)
+| Column | Type | Nullable | Notes |
+|--------|------|----------|-------|
+| `id` | INT UNSIGNED | NO | PK, AUTO_INCREMENT |
+| `name` | VARCHAR(200) | NO | Display name in template picker |
+| `body` | TEXT | NO | Template body with `{{group.var}}` placeholders (e.g. `{{zamowienie.numer}}`, `{{przesylka.numer}}`). Footer NOT included — appended automatically by `SmsConversationService::buildFinalOutboundBody()` |
+| `is_active` | TINYINT(1) | NO | DEFAULT 1 — filters listActive() for picker dropdown |
+| `created_at` | DATETIME | NO | DEFAULT CURRENT_TIMESTAMP |
+| `updated_at` | DATETIME | NO | DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP |
+
+Indexes: `sms_templates_active_name_idx (is_active, name)` — supports active-templates dropdown query.
+
 ---
 
 ## Accounting / Receipts