fix: resolve Paper API build warnings

pom.xml

@@ -11,6 +11,7 @@
     <properties>
         <maven.compiler.release>21</maven.compiler.release>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.proc>full</maven.compiler.proc>
         <cooking.version>0.2.1</cooking.version>
         <denareconomy.version>0.2.0</denareconomy.version>
         <tlibs.version>2.0.0</tlibs.version>

src/main/java/net/tfminecraft/marketblock/inventory/CategoryView.java

@@ -21,6 +21,8 @@
 import net.tfminecraft.marketblock.trade.Category;
 
 public class CategoryView {
+    // Keep the existing legacy text representation, formatting, and exact-string comparisons.
+    @SuppressWarnings("deprecation")
     public void categoryView(Inventory inv, Player p) {
         boolean open = false;
         if(inv == null) {
@@ -47,6 +49,8 @@ public void categoryView(Inventory inv, Player p) {
 		if(open) p.openInventory(inv);
 	}
 
+    // Keep the existing legacy text representation, formatting, and exact-string comparisons.
+    @SuppressWarnings("deprecation")
     public ItemStack createCategoryItem(Category cat) {
         ItemStack i = cat.getItem();
         ItemMeta m = i.getItemMeta();

src/main/java/net/tfminecraft/marketblock/inventory/TradeView.java

@@ -24,6 +24,8 @@
 import net.tfminecraft.marketblock.util.PriceCalculator;
 
 public class TradeView {
+    // Keep the existing legacy text representation, formatting, and exact-string comparisons.
+    @SuppressWarnings("deprecation")
     public void tradeView(Inventory inv, Player p, Category cat) {
         boolean open = false;
         if(inv == null) {
@@ -52,6 +54,8 @@ public void tradeView(Inventory inv, Player p, Category cat) {
 		if(open) p.openInventory(inv);
 	}
 
+    // Keep the existing legacy text representation, formatting, and exact-string comparisons.
+    @SuppressWarnings("deprecation")
     private ItemStack createTradeItem(Trade trade, Category cat) {
         ItemStack i = trade.getIconItem();
         if (i == null || i.getItemMeta() == null) {
@@ -80,6 +84,8 @@ private ItemStack createTradeItem(Trade trade, Category cat) {
         return i;
     }
 
+    // Keep the existing legacy text representation, formatting, and exact-string comparisons.
+    @SuppressWarnings("deprecation")
     private ItemStack getBackButton() {
         ItemStack i = new ItemStack(Material.BARRIER, 1);
         ItemMeta m = i.getItemMeta();
@@ -88,6 +94,8 @@ private ItemStack getBackButton() {
         return i;
     }
 
+    // Keep the existing legacy text representation, formatting, and exact-string comparisons.
+    @SuppressWarnings("deprecation")
     private String getPlainName(ItemStack item) {
         ItemMeta m = item.getItemMeta();
         if (m.hasDisplayName()) {

src/main/java/net/tfminecraft/marketblock/manager/commands/ChatListener.java

@@ -13,6 +13,8 @@
 
 public class ChatListener implements Listener {
 
+    // Retain Bukkit chat-event ordering and String message semantics for existing integrations.
+    @SuppressWarnings("deprecation")
     @EventHandler
     public void onPlayerChat(AsyncPlayerChatEvent event) {
         Player player = event.getPlayer();

src/main/java/net/tfminecraft/marketblock/trade/Category.java

@@ -44,6 +44,8 @@ public String getColorHex() {
         return colorHex;
     }
 
+    // Keep the existing legacy text representation, formatting, and exact-string comparisons.
+    @SuppressWarnings("deprecation")
     public String getTradesTitle() {
         return StringFormatter.formatHex(colorHex + ChatColor.stripColor(name) + " Trades");
     }