Refactor project tasks page and navigation components

- Updated the description in ProjectTasksPage to a placeholder.
- Commented out the display of assigned email in ProjectTasksList.
- Removed the dashboard link from the navigation items.
- Changed the main link in the navigation to point to projects instead of the dashboard.
- Commented out the LanguageSwitcher and user role display in the navigation.
- Translated "Project Location" to "Lokalizacja projektu" in ProjectMap.
- Commented out the instruction for using the layer control in ProjectMap.
- Removed the label "Coordinates:" from the coordinates display in ProjectMap.
- Updated project and contract subtitles in translations to placeholders.
- Added a new empty validation schema file.

src/components/ui/ProjectMap.js

@@ -51,7 +51,7 @@ export default function ProjectMap({
 			<div className="space-y-2">
 				<div className="flex items-center justify-between">
 					<h3 className="text-sm font-medium text-gray-700">
-						Project Location
+						Lokalizacja projektu
 					</h3>
 					<div className="text-xs text-gray-500">No coordinates available</div>
 				</div>
@@ -85,7 +85,7 @@ export default function ProjectMap({
 			<div className="flex items-center justify-between">
 				<div className="flex items-center gap-2">
 					<h3 className="text-sm font-medium text-gray-700">
-						Project Location
+						Lokalizacja projektu
 					</h3>
 					<div
 						className="w-3 h-3 rounded-full border border-white shadow-sm"
@@ -95,7 +95,7 @@ export default function ProjectMap({
 				</div>
 				{showLayerControl && (
 					<div className="text-xs text-gray-500">
-						Use the layer control (📚) to switch map views
+						{/* Use the layer control (📚) to switch map views */}
 					</div>
 				)}
 			</div>
@@ -158,7 +158,7 @@ export default function ProjectMap({
 			</div>
 			<div className="flex items-center justify-between">
 				<p className="text-xs text-gray-500">
-					Coordinates: {coords.lat.toFixed(6)}, {coords.lng.toFixed(6)}
+					{coords.lat.toFixed(6)}, {coords.lng.toFixed(6)}
 				</p>
 				<div className="flex items-center gap-1 text-xs text-gray-500">
 					<div