add Armor HUD module showing worn armor durability

lists the four worn armor pieces helmet-to-boots, skipping empty slots.
with Icons on (default) each row draws the item icon with its durability
percentage beside it, vertically centered; with Icons off it draws the
item's hover name plus the percentage as plain text. the percentage is
colored by condition (green >= 60%, yellow >= 30%, red below) and shows
a dash for items without durability. width/height track the drawn rows
so the editor box matches, falling back to the constructor size when
nothing is equipped

src/main/java/cc/fros/features/modules/hud/ArmorHudModule.java

@@ -0,0 +1,80 @@
+package cc.fros.features.modules.hud;
+
+import cc.fros.event.impl.render.Render2DEvent;
+import cc.fros.features.modules.client.HudModule;
+import cc.fros.features.settings.Setting;
+import cc.fros.util.render.FrosFont;
+import net.minecraft.network.chat.Component;
+import net.minecraft.world.entity.EquipmentSlot;
+import net.minecraft.world.item.ItemStack;
+
+public class ArmorHudModule extends HudModule {
+    /** helmet first, boots last */
+    private static final EquipmentSlot[] SLOTS = {
+            EquipmentSlot.HEAD, EquipmentSlot.CHEST, EquipmentSlot.LEGS, EquipmentSlot.FEET
+    };
+
+    private static final int HEALTHY = 0x55FF55;
+    private static final int WORN = 0xFFFF55;
+    private static final int CRITICAL = 0xFF5555;
+
+    public final Setting<Boolean> icons = bool("Icons", true);
+
+    public ArmorHudModule() {
+        super("Armor", "Display armor durability", 70, 40);
+    }
+
+    @Override
+    protected void render(Render2DEvent e) {
+        super.render(e);
+        if (nullCheck()) return;
+
+        float x = getX();
+        float y = getY();
+        boolean showIcons = icons.getValue();
+        int rowHeight = showIcons ? 16 : FrosFont.lineHeight();
+        int rows = 0;
+        int textWidth = 0;
+
+        for (EquipmentSlot slot : SLOTS) {
+            ItemStack stack = mc.player.getItemBySlot(slot);
+            if (stack.isEmpty()) continue;
+
+            float rowY = y + rows * rowHeight;
+            float ratio = durability(stack);
+            String percent = ratio < 0f ? "\u2014" : Math.round(ratio * 100) + "%";
+            int color = ratio < 0f ? -1
+                    : ratio >= 0.6f ? HEALTHY
+                    : ratio >= 0.3f ? WORN
+                    : CRITICAL;
+
+            int textX;
+            int textY;
+            if (showIcons) {
+                e.getContext().renderItem(stack, (int) x, (int) rowY);
+                textX = (int) x + 19;
+                textY = (int) (rowY + 8 - FrosFont.visualCenter());
+            } else {
+                Component name = stack.getHoverName();
+                FrosFont.draw(e.getContext(), name, (int) x, (int) rowY, -1);
+                textX = (int) (x + FrosFont.width(name) + 4);
+                textY = (int) rowY;
+            }
+            FrosFont.draw(e.getContext(), percent, textX, textY, color);
+            textWidth = Math.max(textWidth, textX - (int) x + FrosFont.width(percent));
+            rows++;
+        }
+
+        if (rows > 0) {
+            setWidth(textWidth);
+            setHeight(rows * rowHeight);
+        }
+    }
+
+    /** durability left as 0..1, or -1 for items without durability */
+    private static float durability(ItemStack stack) {
+        int max = stack.getMaxDamage();
+        if (max <= 0) return -1f;
+        return (max - stack.getDamageValue()) / (float) max;
+    }
+}

src/main/java/cc/fros/manager/ModuleManager.java

@@ -18,6 +18,7 @@ import cc.fros.features.modules.combat.KillAuraModule;
 import cc.fros.features.modules.combat.CriticalsModule;
 import cc.fros.features.modules.combat.KeyPearlModule;
 import cc.fros.features.modules.hud.ArrayListHudModule;
+import cc.fros.features.modules.hud.ArmorHudModule;
 import cc.fros.features.modules.hud.CoordinatesHudModule;
 import cc.fros.features.modules.hud.FpsHudModule;
 import cc.fros.features.modules.hud.PingHudModule;
@@ -57,6 +58,7 @@ public class ModuleManager implements Jsonable, Util {
         register(new RadarHudModule());
         register(new WelcomerHudModule());
         register(new TimeHudModule());
+        register(new ArmorHudModule());
         register(new HudEditorModule());
         register(new ClickGuiModule());
         register(new NotificationsModule());