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/app/api/contacts/[id]/route.js

@@ -0,0 +1,103 @@
+import { NextResponse } from "next/server";
+import {
+	getContactById,
+	updateContact,
+	deleteContact,
+	hardDeleteContact,
+} from "@/lib/queries/contacts";
+import { withAuth } from "@/lib/middleware/auth";
+
+// GET: Get contact by ID
+async function getContactHandler(req, { params }) {
+	try {
+		const contactId = parseInt(params.id);
+		const contact = getContactById(contactId);
+
+		if (!contact) {
+			return NextResponse.json(
+				{ error: "Contact not found" },
+				{ status: 404 }
+			);
+		}
+
+		return NextResponse.json(contact);
+	} catch (error) {
+		console.error("Error fetching contact:", error);
+		return NextResponse.json(
+			{ error: "Failed to fetch contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// PUT: Update contact
+async function updateContactHandler(req, { params }) {
+	try {
+		const contactId = parseInt(params.id);
+		const data = await req.json();
+
+		// Validate contact type if provided
+		if (data.contact_type) {
+			const validTypes = [
+				"project",
+				"contractor",
+				"office",
+				"supplier",
+				"other",
+			];
+			if (!validTypes.includes(data.contact_type)) {
+				return NextResponse.json(
+					{ error: "Invalid contact type" },
+					{ status: 400 }
+				);
+			}
+		}
+
+		const contact = updateContact(contactId, data);
+
+		if (!contact) {
+			return NextResponse.json(
+				{ error: "Contact not found" },
+				{ status: 404 }
+			);
+		}
+
+		return NextResponse.json(contact);
+	} catch (error) {
+		console.error("Error updating contact:", error);
+		return NextResponse.json(
+			{ error: "Failed to update contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// DELETE: Delete contact (soft delete or hard delete)
+async function deleteContactHandler(req, { params }) {
+	try {
+		const contactId = parseInt(params.id);
+		const { searchParams } = new URL(req.url);
+		const hard = searchParams.get("hard") === "true";
+
+		if (hard) {
+			// Hard delete - permanently remove
+			hardDeleteContact(contactId);
+		} else {
+			// Soft delete - set is_active to 0
+			deleteContact(contactId);
+		}
+
+		return NextResponse.json({ message: "Contact deleted successfully" });
+	} catch (error) {
+		console.error("Error deleting contact:", error);
+		return NextResponse.json(
+			{ error: "Failed to delete contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// Protected routes - require authentication
+export const GET = withAuth(getContactHandler);
+export const PUT = withAuth(updateContactHandler);
+export const DELETE = withAuth(deleteContactHandler);