feat(extraordinary-expenses): Add module for extraordinary expenses

Introduces a new module to manage and track extraordinary expenses within condominiums. This includes defining expense items, sharing arrangements, and attaching relevant documents.

The module adds new types for `ExpenseItem`, `ExpenseShare`, and `ExtraordinaryExpense`. Mock database functions are updated to support fetching, creating, and managing these expenses. UI components in `Layout.tsx` and `Settings.tsx` are modified to include navigation and feature toggling for extraordinary expenses. Additionally, new routes are added in `App.tsx` for both administrative and user-facing views of these expenses.

server/db.js

@@ -46,7 +46,12 @@ const dbInterface = {
         if (DB_CLIENT === 'postgres') {
             return {
                 query: executeQuery,
-                release: () => {} 
+                release: () => {},
+                // Mock transaction methods for Postgres simple wrapper
+                // In a real prod app, you would get a specific client from the pool here
+                beginTransaction: async () => {}, 
+                commit: async () => {},
+                rollback: async () => {}
             };
         } else {
             return await mysqlPool.getConnection();
@@ -347,6 +352,58 @@ const initDb = async () => {
       )
     `);
 
+    // 11. Extraordinary Expenses Tables
+    await connection.query(`
+      CREATE TABLE IF NOT EXISTS extraordinary_expenses (
+        id VARCHAR(36) PRIMARY KEY,
+        condo_id VARCHAR(36) NOT NULL,
+        title VARCHAR(255) NOT NULL,
+        description TEXT,
+        start_date ${TIMESTAMP_TYPE},
+        end_date ${TIMESTAMP_TYPE},
+        contractor_name VARCHAR(255),
+        total_amount DECIMAL(15, 2) DEFAULT 0,
+        created_at ${TIMESTAMP_TYPE} DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (condo_id) REFERENCES condos(id) ON DELETE CASCADE
+      )
+    `);
+
+    await connection.query(`
+      CREATE TABLE IF NOT EXISTS expense_items (
+        id VARCHAR(36) PRIMARY KEY,
+        expense_id VARCHAR(36) NOT NULL,
+        description VARCHAR(255),
+        amount DECIMAL(15, 2) NOT NULL,
+        FOREIGN KEY (expense_id) REFERENCES extraordinary_expenses(id) ON DELETE CASCADE
+      )
+    `);
+
+    await connection.query(`
+      CREATE TABLE IF NOT EXISTS expense_shares (
+        id VARCHAR(36) PRIMARY KEY,
+        expense_id VARCHAR(36) NOT NULL,
+        family_id VARCHAR(36) NOT NULL,
+        percentage DECIMAL(5, 2) NOT NULL,
+        amount_due DECIMAL(15, 2) NOT NULL,
+        amount_paid DECIMAL(15, 2) DEFAULT 0,
+        status VARCHAR(20) DEFAULT 'UNPAID',
+        FOREIGN KEY (expense_id) REFERENCES extraordinary_expenses(id) ON DELETE CASCADE,
+        FOREIGN KEY (family_id) REFERENCES families(id) ON DELETE CASCADE
+      )
+    `);
+
+    await connection.query(`
+      CREATE TABLE IF NOT EXISTS expense_attachments (
+        id VARCHAR(36) PRIMARY KEY,
+        expense_id VARCHAR(36) NOT NULL,
+        file_name VARCHAR(255) NOT NULL,
+        file_type VARCHAR(100),
+        data ${LONG_TEXT_TYPE},
+        created_at ${TIMESTAMP_TYPE} DEFAULT CURRENT_TIMESTAMP,
+        FOREIGN KEY (expense_id) REFERENCES extraordinary_expenses(id) ON DELETE CASCADE
+      )
+    `);
+
     // --- SEEDING ---
     const [rows] = await connection.query('SELECT * FROM settings WHERE id = 1');
     const defaultFeatures = {
@@ -354,7 +411,8 @@ const initDb = async () => {
         tickets: true,
         payPal: true,
         notices: true,
-        reports: true
+        reports: true,
+        extraordinaryExpenses: true
     };
 
     if (rows.length === 0) {