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/projects/[id]/contacts/route.js

@@ -0,0 +1,111 @@
+import { NextResponse } from "next/server";
+import {
+	getProjectContacts,
+	linkContactToProject,
+	unlinkContactFromProject,
+	setPrimaryContact,
+} from "@/lib/queries/contacts";
+import { withAuth } from "@/lib/middleware/auth";
+
+// GET: Get all contacts for a project
+async function getProjectContactsHandler(req, { params }) {
+	try {
+		const projectId = parseInt(params.id);
+		const contacts = getProjectContacts(projectId);
+		return NextResponse.json(contacts);
+	} catch (error) {
+		console.error("Error fetching project contacts:", error);
+		return NextResponse.json(
+			{ error: "Failed to fetch project contacts" },
+			{ status: 500 }
+		);
+	}
+}
+
+// POST: Link contact to project
+async function linkContactHandler(req, { params }) {
+	try {
+		const projectId = parseInt(params.id);
+		const { contactId, relationshipType, isPrimary } = await req.json();
+		const userId = req.user?.id;
+
+		if (!contactId) {
+			return NextResponse.json(
+				{ error: "Contact ID is required" },
+				{ status: 400 }
+			);
+		}
+
+		linkContactToProject(
+			projectId,
+			contactId,
+			relationshipType || "general",
+			isPrimary || false,
+			userId
+		);
+
+		const contacts = getProjectContacts(projectId);
+		return NextResponse.json(contacts);
+	} catch (error) {
+		console.error("Error linking contact to project:", error);
+		return NextResponse.json(
+			{ error: "Failed to link contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// DELETE: Unlink contact from project
+async function unlinkContactHandler(req, { params }) {
+	try {
+		const projectId = parseInt(params.id);
+		const { searchParams } = new URL(req.url);
+		const contactId = parseInt(searchParams.get("contactId"));
+
+		if (!contactId) {
+			return NextResponse.json(
+				{ error: "Contact ID is required" },
+				{ status: 400 }
+			);
+		}
+
+		unlinkContactFromProject(projectId, contactId);
+		return NextResponse.json({ message: "Contact unlinked successfully" });
+	} catch (error) {
+		console.error("Error unlinking contact from project:", error);
+		return NextResponse.json(
+			{ error: "Failed to unlink contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+// PATCH: Set primary contact
+async function setPrimaryContactHandler(req, { params }) {
+	try {
+		const projectId = parseInt(params.id);
+		const { contactId } = await req.json();
+
+		if (!contactId) {
+			return NextResponse.json(
+				{ error: "Contact ID is required" },
+				{ status: 400 }
+			);
+		}
+
+		setPrimaryContact(projectId, contactId);
+		const contacts = getProjectContacts(projectId);
+		return NextResponse.json(contacts);
+	} catch (error) {
+		console.error("Error setting primary contact:", error);
+		return NextResponse.json(
+			{ error: "Failed to set primary contact" },
+			{ status: 500 }
+		);
+	}
+}
+
+export const GET = withAuth(getProjectContactsHandler);
+export const POST = withAuth(linkContactHandler);
+export const DELETE = withAuth(unlinkContactHandler);
+export const PATCH = withAuth(setPrimaryContactHandler);