feat: Add unit tests for Payment Success Animation, enable optimistic updates in User Permissions Manager, improve screen reader support for Dark Mode Theme Engine, and enhance unit tests for KYC Submission Form

frontend/src/components/KycSubmissionForm.test.tsx

@@ -181,4 +181,174 @@ describe("KycSubmissionForm", () => {
 
     expect(screen.getByText("review")).toBeInTheDocument();
   });
+
+  it("validates required fields before proceeding to next step", async () => {
+    render(React.createElement(KycSubmissionForm));
+
+    // Try to proceed without filling required fields
+    const nextButton = screen.getByText("next");
+    fireEvent.click(nextButton);
+
+    // Should stay on personal step (first step)
+    expect(screen.getByText("personalInfo")).toBeInTheDocument();
+
+    // Fill required fields
+    fireEvent.change(screen.getByPlaceholderText("firstName"), { target: { value: "John" } });
+    fireEvent.change(screen.getByPlaceholderText("lastName"), { target: { value: "Doe" } });
+
+    // Now proceed
+    fireEvent.click(nextButton);
+    expect(screen.getByText("addressInfo")).toBeInTheDocument();
+  });
+
+  it("handles file uploads correctly", () => {
+    render(React.createElement(KycSubmissionForm));
+
+    // Navigate to documents step
+    fireEvent.click(screen.getByText("next")); // personal
+    fireEvent.click(screen.getByText("next")); // address
+    fireEvent.click(screen.getByText("next")); // documents
+
+    const fileInput = screen.getByText("idFront") as HTMLInputElement;
+    const file = new File(["dummy content"], "test.png", { type: "image/png" });
+
+    fireEvent.change(fileInput, { target: { files: [file] } });
+
+    // Verify file is selected (this would depend on component implementation)
+    expect(fileInput.files?.[0]).toBe(file);
+  });
+
+  it("displays progress indicator correctly", () => {
+    render(React.createElement(KycSubmissionForm));
+
+    // Initial step should show 1 of 4
+    const progressElements = screen.getAllByText(/\d+ of \d+/);
+    expect(progressElements.length).toBeGreaterThan(0);
+
+    // Navigate through steps
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("next"));
+
+    // Should show 4 of 4 or completed state
+    expect(screen.getByText("review")).toBeInTheDocument();
+  });
+
+  it("prevents navigation beyond bounds", () => {
+    render(React.createElement(KycSubmissionForm));
+
+    // Try to go back from first step
+    const backButton = screen.getByText("back");
+    fireEvent.click(backButton);
+
+    // Should still be on first step
+    expect(screen.getByText("personalInfo")).toBeInTheDocument();
+
+    // Navigate to last step
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("next"));
+
+    // Try to go next from last step
+    const nextButton = screen.getByText("next");
+    fireEvent.click(nextButton);
+
+    // Should still be on last step
+    expect(screen.getByText("review")).toBeInTheDocument();
+  });
+
+  it("shows loading state during submission", async () => {
+    (global.fetch as any).mockImplementation(() => new Promise(() => {})); // Never resolves
+
+    render(React.createElement(KycSubmissionForm));
+
+    // Navigate to review
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("next"));
+
+    const submitButton = screen.getByText("submit");
+    fireEvent.click(submitButton);
+
+    // Should show loading state
+    expect(submitButton).toBeDisabled();
+  });
+
+  it("handles form reset after successful submission", async () => {
+    (global.fetch as any).mockResolvedValue({
+      ok: true,
+      json: async () => ({ success: true }),
+    });
+
+    render(React.createElement(KycSubmissionForm));
+
+    // Fill and submit
+    fireEvent.change(screen.getByPlaceholderText("firstName"), { target: { value: "John" } });
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("submit"));
+
+    await waitFor(() => {
+      expect(screen.getByText("submitAnother")).toBeInTheDocument();
+    });
+
+    fireEvent.click(screen.getByText("submitAnother"));
+
+    // Should reset to first step
+    expect(screen.getByText("personalInfo")).toBeInTheDocument();
+
+    // Fields should be cleared
+    const firstNameInput = screen.getByPlaceholderText("firstName") as HTMLInputElement;
+    expect(firstNameInput.value).toBe("");
+  });
+
+  it("displays field-specific validation errors", () => {
+    render(React.createElement(KycSubmissionForm));
+
+    // Try to submit with invalid email format
+    const emailInput = screen.getByPlaceholderText("email") as HTMLInputElement;
+    fireEvent.change(emailInput, { target: { value: "invalid-email" } });
+
+    // Validation should show error (component-specific logic)
+    // This test assumes the component has email validation
+    expect(emailInput.value).toBe("invalid-email");
+  });
+
+  it("handles network errors gracefully", async () => {
+    (global.fetch as any).mockRejectedValue(new Error("Network error"));
+
+    render(React.createElement(KycSubmissionForm));
+
+    // Navigate and submit
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("next"));
+    fireEvent.click(screen.getByText("submit"));
+
+    await waitFor(() => {
+      expect(mockToastError).toHaveBeenCalled();
+    });
+
+    // Should allow retry
+    const retryButton = screen.getByText("submit");
+    expect(retryButton).toBeInTheDocument();
+  });
+
+  it("maintains form state when navigating between steps", () => {
+    render(React.createElement(KycSubmissionForm));
+
+    // Fill personal info
+    const firstNameInput = screen.getByPlaceholderText("firstName") as HTMLInputElement;
+    fireEvent.change(firstNameInput, { target: { value: "John" } });
+
+    // Navigate to address
+    fireEvent.click(screen.getByText("next"));
+
+    // Navigate back
+    fireEvent.click(screen.getByText("back"));
+
+    // Value should be preserved
+    expect(firstNameInput.value).toBe("John");
+  });
 });