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]/projects/route.js

@@ -0,0 +1,40 @@
+import { NextResponse } from "next/server";
+import db from "@/lib/db";
+import { withAuth } from "@/lib/middleware/auth";
+
+// GET /api/contacts/[id]/projects - Get all projects linked to a contact
+export const GET = withAuth(async (request, { params }) => {
+	try {
+		const contactId = params.id;
+
+		// Get all projects linked to this contact with relationship details
+		const projects = db
+			.prepare(
+				`
+				SELECT 
+					p.project_id,
+					p.project_name,
+					p.project_status,
+					pc.relationship_type,
+					pc.is_primary,
+					pc.added_at
+				FROM projects p
+				INNER JOIN project_contacts pc ON p.project_id = pc.project_id
+				WHERE pc.contact_id = ?
+				ORDER BY pc.is_primary DESC, p.project_name ASC
+			`
+			)
+			.all(contactId);
+
+		return NextResponse.json({
+			projects,
+			count: projects.length,
+		});
+	} catch (error) {
+		console.error("Error fetching contact projects:", error);
+		return NextResponse.json(
+			{ error: "Failed to fetch projects" },
+			{ status: 500 }
+		);
+	}
+});