Added PFM Console UI project

PostFundManagement.ConsoleUI/src/auth/jwt.ts

@@ -0,0 +1,23 @@
+/**
+ * Lightweight browser-safe JWT payload decoder without external native dependencies.
+ */
+export function parseJwtClaims(token: string): Record<string, any> {
+    if (!token || typeof token !== 'string') return {};
+    try {
+        const parts = token.split('.');
+        if (parts.length < 2) return {};
+        const base64Url = parts[1];
+        const base64 = base64Url.replace(/-/g, '+').replace(/_/g, '/');
+        const jsonPayload = decodeURIComponent(
+            window
+                .atob(base64)
+                .split('')
+                .map((c) => '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2))
+                .join('')
+        );
+        return JSON.parse(jsonPayload);
+    } catch (err) {
+        console.debug('Failed to decode JWT claims payload:', err);
+        return {};
+    }
+}