feat: ticket reply improvements + priority + templates + Telegram

Reply form:
- Mailbox/sender selection dropdown (choose which email to reply from)
- CC field (auto-filled from incoming email CC, editable)
- Reply templates dropdown (quick insert pre-made responses)

Priority system:
- Three levels: normaali, tärkeä, urgent
- Priority dropdown in ticket detail view
- Priority-based sorting (urgent/tärkeä always on top)
- Visual indicators in ticket list (colored rows, emoji badges)
- Priority emails: per-company email list that auto-sets "tärkeä"

Response templates:
- CRUD management in Settings tab
- Dropdown selector in reply form
- Templates insert into textarea

Telegram alerts:
- Bot token + chat ID configuration in Settings
- Test button to verify connection
- Auto-alert on urgent tickets (both manual and from email fetch)
- Alert on priority email matches

Database changes:
- New tables: reply_templates, customer_priority_emails
- New columns: tickets.cc, tickets.priority
- ALTER TABLE migration in initDatabase()

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

db.php

@@ -246,6 +246,8 @@ function initDatabase(): void {
             customer_name VARCHAR(255) DEFAULT '',
             message_id VARCHAR(500) DEFAULT '',
             mailbox_id VARCHAR(20) DEFAULT '',
+            cc TEXT DEFAULT '',
+            priority VARCHAR(20) DEFAULT 'normaali',
             auto_close_at VARCHAR(30) DEFAULT '',
             created DATETIME,
             updated DATETIME,
@@ -328,6 +330,25 @@ function initDatabase(): void {
             INDEX idx_company (company_id)
         ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4",
 
+        "CREATE TABLE IF NOT EXISTS customer_priority_emails (
+            id INT AUTO_INCREMENT PRIMARY KEY,
+            company_id VARCHAR(50) NOT NULL,
+            email VARCHAR(255) NOT NULL,
+            FOREIGN KEY (company_id) REFERENCES companies(id) ON DELETE CASCADE,
+            INDEX idx_company (company_id),
+            UNIQUE KEY udx_company_email (company_id, email)
+        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4",
+
+        "CREATE TABLE IF NOT EXISTS reply_templates (
+            id VARCHAR(20) PRIMARY KEY,
+            company_id VARCHAR(50) NOT NULL,
+            nimi VARCHAR(255) NOT NULL,
+            body TEXT NOT NULL,
+            sort_order INT DEFAULT 0,
+            FOREIGN KEY (company_id) REFERENCES companies(id) ON DELETE CASCADE,
+            INDEX idx_company (company_id)
+        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4",
+
         "CREATE TABLE IF NOT EXISTS files (
             id INT AUTO_INCREMENT PRIMARY KEY,
             company_id VARCHAR(50) NOT NULL,
@@ -347,6 +368,15 @@ function initDatabase(): void {
             throw new RuntimeException("Taulun luonti epäonnistui (taulu #" . ($i+1) . "): " . $db->error);
         }
     }
+
+    // ALTER TABLE -migraatiot (turvallisia, ajetaan kerran)
+    $alters = [
+        "ALTER TABLE tickets ADD COLUMN cc TEXT DEFAULT '' AFTER mailbox_id",
+        "ALTER TABLE tickets ADD COLUMN priority VARCHAR(20) DEFAULT 'normaali' AFTER cc",
+    ];
+    foreach ($alters as $sql) {
+        try { $db->query($sql); } catch (\Throwable $e) { /* sarake on jo olemassa */ }
+    }
 }
 
 // ==================== YRITYKSET ====================
@@ -769,14 +799,15 @@ function dbSaveTicket(string $companyId, array $ticket): void {
     try {
         _dbExecute("
             INSERT INTO tickets (id, company_id, subject, from_email, from_name, status, type,
-                assigned_to, customer_id, customer_name, message_id, mailbox_id, auto_close_at, created, updated)
+                assigned_to, customer_id, customer_name, message_id, mailbox_id, cc, priority, auto_close_at, created, updated)
             VALUES (:id, :company_id, :subject, :from_email, :from_name, :status, :type,
-                :assigned_to, :customer_id, :customer_name, :message_id, :mailbox_id, :auto_close_at, :created, :updated)
+                :assigned_to, :customer_id, :customer_name, :message_id, :mailbox_id, :cc, :priority, :auto_close_at, :created, :updated)
             ON DUPLICATE KEY UPDATE
                 subject = VALUES(subject), from_email = VALUES(from_email), from_name = VALUES(from_name),
                 status = VALUES(status), type = VALUES(type), assigned_to = VALUES(assigned_to),
                 customer_id = VALUES(customer_id), customer_name = VALUES(customer_name),
                 message_id = VALUES(message_id), mailbox_id = VALUES(mailbox_id),
+                cc = VALUES(cc), priority = VALUES(priority),
                 auto_close_at = VALUES(auto_close_at), updated = VALUES(updated)
         ", [
             'id'             => $ticket['id'],
@@ -791,6 +822,8 @@ function dbSaveTicket(string $companyId, array $ticket): void {
             'customer_name'  => $ticket['customer_name'] ?? '',
             'message_id'     => $ticket['message_id'] ?? '',
             'mailbox_id'     => $ticket['mailbox_id'] ?? '',
+            'cc'             => $ticket['cc'] ?? '',
+            'priority'       => $ticket['priority'] ?? 'normaali',
             'auto_close_at'  => $ticket['auto_close_at'] ?? '',
             'created'        => $ticket['created'] ?? date('Y-m-d H:i:s'),
             'updated'        => $ticket['updated'] ?? date('Y-m-d H:i:s'),
@@ -1015,3 +1048,48 @@ function dbSetCompanyApiKey(string $companyId, string $apiKey): void {
 function dbSetCompanyCorsOrigins(string $companyId, array $origins): void {
     _dbExecute("UPDATE companies SET cors_origins = ? WHERE id = ?", [json_encode($origins), $companyId]);
 }
+
+// ==================== VASTAUSPOHJAT ====================
+
+function dbLoadTemplates(string $companyId): array {
+    $templates = _dbFetchAll("SELECT * FROM reply_templates WHERE company_id = ? ORDER BY sort_order, nimi", [$companyId]);
+    foreach ($templates as &$t) {
+        $t['sort_order'] = (int)$t['sort_order'];
+        unset($t['company_id']);
+    }
+    return $templates;
+}
+
+function dbSaveTemplate(string $companyId, array $tpl): void {
+    _dbExecute("
+        INSERT INTO reply_templates (id, company_id, nimi, body, sort_order)
+        VALUES (:id, :company_id, :nimi, :body, :sort_order)
+        ON DUPLICATE KEY UPDATE
+            nimi = VALUES(nimi), body = VALUES(body), sort_order = VALUES(sort_order)
+    ", [
+        'id'         => $tpl['id'],
+        'company_id' => $companyId,
+        'nimi'       => $tpl['nimi'] ?? '',
+        'body'       => $tpl['body'] ?? '',
+        'sort_order' => $tpl['sort_order'] ?? 0,
+    ]);
+}
+
+function dbDeleteTemplate(string $templateId): void {
+    _dbExecute("DELETE FROM reply_templates WHERE id = ?", [$templateId]);
+}
+
+// ==================== PRIORITY EMAILS (ASIAKKUUDET) ====================
+
+function dbLoadPriorityEmails(string $companyId): array {
+    return _dbFetchColumn("SELECT email FROM customer_priority_emails WHERE company_id = ?", [$companyId]);
+}
+
+function dbIsPriorityEmail(string $companyId, string $email): bool {
+    $email = strtolower(trim($email));
+    if (!$email) return false;
+    return (bool)_dbFetchScalar(
+        "SELECT COUNT(*) FROM customer_priority_emails WHERE company_id = ? AND LOWER(email) = ?",
+        [$companyId, $email]
+    );
+}