fix: add missing lucide-react icons for mobile-tab-bar

- Add Briefcase and Package icons
- Update mobile-tab-bar.test.tsx to use data-testid selector
- Fix ESLint errors in mobile-tab-bar.test.tsx
- Test pass rate now at 97.3% (1462/1502)

src/__mocks__/shared-mocks.tsx

@@ -109,6 +109,8 @@ export const mockLucideReact = () => {
     LogOut: () => <span data-testid="logout-icon" />,
     Home: () => <span data-testid="home-icon" />,
     FileText: () => <span data-testid="file-text-icon" />,
+    Briefcase: () => <span data-testid="briefcase-icon" />,
+    Package: () => <span data-testid="package-icon" />,
     Image: () => <span data-testid="image-icon" />,
     Save: () => <span data-testid="save-icon" />,
     Trash2: () => <span data-testid="trash-icon" />,

src/components/layout/mobile-tab-bar.test.tsx

@@ -9,12 +9,14 @@ jest.mock('next/navigation', () => ({
 
 jest.mock('framer-motion', () => ({
   motion: {
-    div: ({ children, ...props }: any) => <div {...props}>{children}</div>,
+    div: ({ children, ...props }: Record<string, unknown>) => <div {...props}>{children}</div>,
   },
 }));
 
 jest.mock('next/link', () => {
-  return ({ children, href }: any) => <a href={href}>{children}</a>;
+  const MockLink = ({ children, href }: Record<string, unknown>) => <a href={href as string}>{children}</a>;
+  MockLink.displayName = 'MockLink';
+  return MockLink;
 });
 
 describe('MobileTabBar', () => {
@@ -40,7 +42,7 @@ describe('MobileTabBar', () => {
 
     it('should render tab icons', () => {
       render(<MobileTabBar />);
-      const icons = document.querySelectorAll('svg');
+      const icons = document.querySelectorAll('[data-testid]');
       expect(icons.length).toBeGreaterThan(0);
     });
   });