feat: added javadoc to more pages

src/main/java/edu/group5/app/view/Header.java

@@ -7,6 +7,14 @@
 import javafx.scene.image.ImageView;
 import javafx.scene.layout.*;
 
+/**
+ * A main header for the app.
+ *
+ * <p>The header consists of a logo button to homepage,
+ * a navigation bar with buttons to home page, causes page,
+ * and about us page. The header also has a profile button
+ * in the upper right corner.</p>
+ */
 public class Header extends BorderPane {
   private final NavigationController controller;
 

src/main/java/edu/group5/app/view/causespage/CausesPageView.java

@@ -13,6 +13,23 @@
 import java.util.Map;
 import java.util.stream.Collectors;
 
+/**
+ * A view for the causes page.
+ *
+ * <p>This page allows users to browse and search
+ * for organizations they may want to donate to.
+ * Organizations are displayed in a grid layout,
+ * with four organizations per row. Each organization
+ * is represented as a clickable card containing its name and logo,
+ * which navigates to the organization's detail page. </p>
+ *
+ * <p>The page includes a search field that filters the
+ * displayed organizations based on user input.</p>
+ *
+ * <p>Logos are fetched asynchronously, and a loading indicator
+ * is shown while the data is being retrieved. If a logo cannot be loaded,
+ * a fallback "no image" is displayed.</p>
+ */
 public class CausesPageView extends BorderPane {
   private final AppState appState;
   private final NavigationController nav;

src/main/java/edu/group5/app/view/causespage/OrganizationCard.java

@@ -10,6 +10,16 @@
 import javafx.scene.layout.VBox;
 import javafx.scene.text.Text;
 
+/**
+ * OrganizationCard represent a single organization card
+ * in the causes page.
+ *
+ * <p>The card displays the organization's logo, name, and verification
+ * checkmark. If no logo is available, a fallback text ("No image") is shown.</p>
+ *
+ * <p>The card is clickable. When pressed it navigates
+ * to the organization's detail page.</p>
+ */
 public class OrganizationCard extends VBox {
   private final AppState appState;
   private final Organization organization;

src/main/java/edu/group5/app/view/organizationpage/OrganizationPageView.java

@@ -19,6 +19,15 @@
 
 import java.util.Objects;
 
+/**
+ * A view for displaying information about a selected organization.
+ *
+ * <p>The page shows the organization's logo, name, and description.
+ * If no logo is available, a fallback "No image" is displayed.</p>
+ *
+ * <p>The page also includes a donate button that navigates to the
+ * donation page, and a back button to return to the causes page.</p>
+ */
 public class OrganizationPageView extends BorderPane {
   private final AppState appState;
   private final NavigationController nav;