chore: migrate to TypeScript

- Convert all .js files to .tsx/.ts
- Add types for data structures (MuseumRecord, Metrics, etc.)
- Add type declarations for react-chartjs-2
- Configure tsconfig with relaxed strictness for gradual adoption
- All components now use TypeScript

src/config/chartConfig.ts

@@ -38,7 +38,7 @@ export const chartColors = {
   grid: '#f1f5f9'
 };
 
-export const createDataLabelConfig = (showDataLabels) => ({
+export const createDataLabelConfig = (showDataLabels: boolean): any => ({
   display: showDataLabels,
   color: '#1e293b',
   font: { size: 10, weight: 600 },
@@ -58,7 +58,7 @@ export const createDataLabelConfig = (showDataLabels) => ({
   }
 });
 
-export const createBaseOptions = (showDataLabels) => ({
+export const createBaseOptions = (showDataLabels: boolean): any => ({
   responsive: true,
   maintainAspectRatio: false,
   locale: 'en-US', // Force LTR number formatting