feat: add contact management functionality

- Implemented ContactForm component for creating and editing contacts.
- Added ProjectContactSelector component to manage project-specific contacts.
- Updated ProjectForm to include ProjectContactSelector for associating contacts with projects.
- Enhanced Card component with a new CardTitle subcomponent for better structure.
- Updated Navigation to include a link to the contacts page.
- Added translations for contact-related terms in the i18n module.
- Initialized contacts database schema and created necessary tables for contact management.
- Developed queries for CRUD operations on contacts, including linking and unlinking contacts to projects.
- Created a test script to validate contact queries against the database.

src/lib/init-db.js

@@ -515,4 +515,44 @@ export default function initializeDatabase() {
 		INSERT OR IGNORE INTO settings (key, value, description) VALUES 
 		('backup_notification_user_id', '', 'User ID to receive backup completion notifications');
 	`);
+
+	// Contacts table for managing contact information
+	db.exec(`
+		CREATE TABLE IF NOT EXISTS contacts (
+			contact_id INTEGER PRIMARY KEY AUTOINCREMENT,
+			name TEXT NOT NULL,
+			phone TEXT,
+			email TEXT,
+			company TEXT,
+			position TEXT,
+			contact_type TEXT CHECK(contact_type IN ('project', 'contractor', 'office', 'supplier', 'other')) DEFAULT 'other',
+			notes TEXT,
+			is_active INTEGER DEFAULT 1,
+			created_at TEXT DEFAULT CURRENT_TIMESTAMP,
+			updated_at TEXT DEFAULT CURRENT_TIMESTAMP
+		);
+
+		-- Project contacts junction table (many-to-many relationship)
+		CREATE TABLE IF NOT EXISTS project_contacts (
+			project_id INTEGER NOT NULL,
+			contact_id INTEGER NOT NULL,
+			relationship_type TEXT DEFAULT 'general',
+			is_primary INTEGER DEFAULT 0,
+			added_at TEXT DEFAULT CURRENT_TIMESTAMP,
+			added_by TEXT,
+			PRIMARY KEY (project_id, contact_id),
+			FOREIGN KEY (project_id) REFERENCES projects(project_id) ON DELETE CASCADE,
+			FOREIGN KEY (contact_id) REFERENCES contacts(contact_id) ON DELETE CASCADE,
+			FOREIGN KEY (added_by) REFERENCES users(id)
+		);
+
+		-- Indexes for contacts
+		CREATE INDEX IF NOT EXISTS idx_contacts_name ON contacts(name);
+		CREATE INDEX IF NOT EXISTS idx_contacts_type ON contacts(contact_type);
+		CREATE INDEX IF NOT EXISTS idx_contacts_active ON contacts(is_active);
+		CREATE INDEX IF NOT EXISTS idx_contacts_phone ON contacts(phone);
+		CREATE INDEX IF NOT EXISTS idx_contacts_email ON contacts(email);
+		CREATE INDEX IF NOT EXISTS idx_project_contacts_project ON project_contacts(project_id);
+		CREATE INDEX IF NOT EXISTS idx_project_contacts_contact ON project_contacts(contact_id);
+	`);
 }