feat: Implement internationalization for task management components

- Added translation support for task-related strings in ProjectTaskForm and ProjectTasksSection components.
- Integrated translation for navigation items in the Navigation component.
- Created ProjectCalendarWidget component with Polish translations for project statuses and deadlines.
- Developed Tooltip component for enhanced user experience with tooltips.
- Established a field change history logging system in the database with associated queries.
- Enhanced task update logging to include translated status and priority changes.
- Introduced server-side translations for system messages to improve localization.

src/app/api/projects/[id]/finish-date-updates/route.js

@@ -0,0 +1,24 @@
+// Force this API route to use Node.js runtime for database access
+export const runtime = "nodejs";
+
+import { getFinishDateUpdates } from "@/lib/queries/projects";
+import { NextResponse } from "next/server";
+import { withReadAuth } from "@/lib/middleware/auth";
+
+async function getFinishDateUpdatesHandler(req, { params }) {
+	const { id } = await params;
+	
+	try {
+		const updates = getFinishDateUpdates(parseInt(id));
+		return NextResponse.json(updates);
+	} catch (error) {
+		console.error("Error fetching finish date updates:", error);
+		return NextResponse.json(
+			{ error: "Failed to fetch finish date updates" },
+			{ status: 500 }
+		);
+	}
+}
+
+// Protected route - require authentication
+export const GET = withReadAuth(getFinishDateUpdatesHandler);

src/app/api/projects/[id]/route.js

@@ -3,9 +3,11 @@ export const runtime = "nodejs";
 
 import {
 	getProjectById,
+	getProjectWithContract,
 	updateProject,
 	deleteProject,
 } from "@/lib/queries/projects";
+import { logFieldChange } from "@/lib/queries/fieldHistory";
 import initializeDatabase from "@/lib/init-db";
 import { NextResponse } from "next/server";
 import { withReadAuth, withUserAuth } from "@/lib/middleware/auth";
@@ -20,7 +22,7 @@ initializeDatabase();
 
 async function getProjectHandler(req, { params }) {
 	const { id } = await params;
-	const project = getProjectById(parseInt(id));
+	const project = getProjectWithContract(parseInt(id));
 
 	if (!project) {
 		return NextResponse.json({ error: "Project not found" }, { status: 404 });
@@ -46,9 +48,31 @@ async function updateProjectHandler(req, { params }) {
 	// Get user ID from authenticated request
 	const userId = req.user?.id;
 
-	// Get original project data for audit log
+	// Get original project data for audit log and field tracking
 	const originalProject = getProjectById(parseInt(id));
 
+	if (!originalProject) {
+		return NextResponse.json({ error: "Project not found" }, { status: 404 });
+	}
+
+	// Track field changes for specific fields we want to monitor
+	const fieldsToTrack = ['finish_date', 'project_status', 'assigned_to', 'contract_id'];
+	
+	for (const fieldName of fieldsToTrack) {
+		if (data.hasOwnProperty(fieldName)) {
+			const oldValue = originalProject[fieldName];
+			const newValue = data[fieldName];
+			
+			if (oldValue !== newValue) {
+				try {
+					logFieldChange('projects', parseInt(id), fieldName, oldValue, newValue, userId);
+				} catch (error) {
+					console.error(`Failed to log field change for ${fieldName}:`, error);
+				}
+			}
+		}
+	}
+
 	updateProject(parseInt(id), data, userId);
 
 	// Get updated project