feat: Add tickets module and PayPal integration

Introduces a new 'Tickets' module for users to submit and manage issues within their condominium. This includes defining ticket types, statuses, priorities, and categories.

Additionally, this commit integrates PayPal as a payment option for family fee payments, enabling users to pay directly via PayPal using their client ID.

Key changes:
- Added `Ticket` related types and enums.
- Implemented `TicketService` functions for CRUD operations.
- Integrated `@paypal/react-paypal-js` library.
- Added `paypalClientId` to `AppSettings` and `Condo` types.
- Updated `FamilyDetail` page to include PayPal payment option.
- Added 'Segnalazioni' navigation link to `Layout`.

server/db.js

@@ -60,6 +60,7 @@ const initDb = async () => {
     console.log(`Database connected successfully using ${DB_CLIENT}.`);
 
     const TIMESTAMP_TYPE = 'TIMESTAMP'; 
+    const LONG_TEXT_TYPE = DB_CLIENT === 'postgres' ? 'TEXT' : 'LONGTEXT'; // For base64 files
     
     // 0. Settings Table (Global App Settings)
     await connection.query(`
@@ -82,21 +83,26 @@ const initDb = async () => {
         zip_code VARCHAR(20),
         notes TEXT,
         iban VARCHAR(50),
+        paypal_client_id VARCHAR(255),
         default_monthly_quota DECIMAL(10, 2) DEFAULT 100.00,
         image VARCHAR(255),
         created_at ${TIMESTAMP_TYPE} DEFAULT CURRENT_TIMESTAMP
       )
     `);
     
-    // Migration for condos: Add new address fields
+    // Migration for condos: Add new address fields and paypal_client_id
     try {
         let hasCity = false;
+        let hasPayPal = false;
+        
         if (DB_CLIENT === 'postgres') {
             const [cols] = await connection.query("SELECT column_name FROM information_schema.columns WHERE table_name='condos'");
             hasCity = cols.some(c => c.column_name === 'city');
+            hasPayPal = cols.some(c => c.column_name === 'paypal_client_id');
         } else {
             const [cols] = await connection.query("SHOW COLUMNS FROM condos");
             hasCity = cols.some(c => c.Field === 'city');
+            hasPayPal = cols.some(c => c.Field === 'paypal_client_id');
         }
 
         if (!hasCity) {
@@ -107,6 +113,12 @@ const initDb = async () => {
             await connection.query("ALTER TABLE condos ADD COLUMN zip_code VARCHAR(20)");
             await connection.query("ALTER TABLE condos ADD COLUMN notes TEXT");
         }
+        
+        if (!hasPayPal) {
+             console.log('Migrating: Adding PayPal fields to condos...');
+             await connection.query("ALTER TABLE condos ADD COLUMN paypal_client_id VARCHAR(255)");
+        }
+
     } catch(e) { console.warn("Condos migration warning:", e.message); }
 
 
@@ -254,6 +266,37 @@ const initDb = async () => {
         FOREIGN KEY (notice_id) REFERENCES notices(id) ON DELETE CASCADE
       )
     `);
+    
+    // 8. Tickets Table (Segnalazioni)
+    await connection.query(`
+      CREATE TABLE IF NOT EXISTS tickets (
+        id VARCHAR(36) PRIMARY KEY,
+        condo_id VARCHAR(36) NOT NULL,
+        user_id VARCHAR(36) NOT NULL,
+        title VARCHAR(255) NOT NULL,
+        description TEXT,
+        status VARCHAR(20) DEFAULT 'OPEN',
+        priority VARCHAR(20) DEFAULT 'MEDIUM',
+        category VARCHAR(20) DEFAULT 'OTHER',
+        created_at ${TIMESTAMP_TYPE} DEFAULT CURRENT_TIMESTAMP,
+        updated_at ${TIMESTAMP_TYPE} DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+        FOREIGN KEY (condo_id) REFERENCES condos(id) ON DELETE CASCADE,
+        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+      )
+    `);
+
+    // 9. Ticket Attachments Table
+    await connection.query(`
+      CREATE TABLE IF NOT EXISTS ticket_attachments (
+        id VARCHAR(36) PRIMARY KEY,
+        ticket_id VARCHAR(36) NOT NULL,
+        file_name VARCHAR(255) NOT NULL,
+        file_type VARCHAR(100),
+        data ${LONG_TEXT_TYPE}, -- Base64 encoded file
+        created_at ${TIMESTAMP_TYPE} DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (ticket_id) REFERENCES tickets(id) ON DELETE CASCADE
+      )
+    `);
 
     // --- SEEDING ---
     const [rows] = await connection.query('SELECT * FROM settings WHERE id = 1');
@@ -289,4 +332,4 @@ const initDb = async () => {
   }
 };
 
-module.exports = { pool: dbInterface, initDb };
+module.exports = { pool: dbInterface, initDb };