Re-add OverlayHud against MC 26.2 HUD API

- HudElementRegistry.attachElementAfter(VanillaHudElements.MISC_OVERLAYS, ...)
  registers compass + watermark as HudElement implementations.
- HudElement#extractRenderState(GuiGraphicsExtractor, DeltaTracker) is the
  callback signature; vanilla auto-skips when Hud.isHidden().
- GuiGraphicsExtractor renames: drawString -> text. fill is unchanged.
- Camera became record-like: getMainCamera() -> mainCamera(), getYRot() -> yRot().
- Identifier replaces ResourceLocation (since 26.1).

src/client/java/ru/nevetime/clientirc/ClientIrcMod.java

@@ -39,6 +39,7 @@ public final class ClientIrcMod implements ClientModInitializer {
         FriendsManager.init(configDir);
         service = new IrcService(config, LOGGER);
 
+        OverlayHud.init();
         MiddleClickHandler.init(() -> service, () -> resolvePlayerName(Minecraft.getInstance()));
 
         ClientLifecycleEvents.CLIENT_STARTED.register(client -> {

src/client/java/ru/nevetime/clientirc/OverlayHud.java

@@ -0,0 +1,103 @@
+package ru.nevetime.clientirc;
+
+import com.mojang.authlib.GameProfile;
+import net.fabricmc.fabric.api.client.rendering.v1.hud.HudElement;
+import net.fabricmc.fabric.api.client.rendering.v1.hud.HudElementRegistry;
+import net.fabricmc.fabric.api.client.rendering.v1.hud.VanillaHudElements;
+import net.minecraft.client.DeltaTracker;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.Font;
+import net.minecraft.client.gui.GuiGraphicsExtractor;
+import net.minecraft.client.multiplayer.PlayerInfo;
+import net.minecraft.resources.Identifier;
+
+public final class OverlayHud {
+    private static final Identifier COMPASS_LAYER = Identifier.fromNamespaceAndPath("clientirc", "compass");
+    private static final Identifier WATERMARK_LAYER = Identifier.fromNamespaceAndPath("clientirc", "watermark");
+
+    private static final int COMPASS_WIDTH = 180;
+    private static final int COMPASS_HEIGHT = 14;
+    private static final int COMPASS_Y = 2;
+
+    private OverlayHud() {}
+
+    public static void init() {
+        HudElementRegistry.attachElementAfter(
+            VanillaHudElements.MISC_OVERLAYS, COMPASS_LAYER, (HudElement) OverlayHud::renderCompass);
+        HudElementRegistry.attachElementAfter(
+            VanillaHudElements.MISC_OVERLAYS, WATERMARK_LAYER, (HudElement) OverlayHud::renderWatermark);
+    }
+
+    private static void renderCompass(GuiGraphicsExtractor graphics, DeltaTracker deltaTracker) {
+        Minecraft mc = Minecraft.getInstance();
+        if (mc.level == null) return;
+        Font font = mc.font;
+
+        int x = (graphics.guiWidth() - COMPASS_WIDTH) / 2;
+        int y = COMPASS_Y;
+
+        graphics.fill(x, y, x + COMPASS_WIDTH, y + COMPASS_HEIGHT, 0x80000000);
+
+        float yaw = mc.gameRenderer.mainCamera().yRot();
+
+        int[] cardYaws = {180, -90, 0, 90};
+        String[] cardLabels = {"N", "E", "S", "W"};
+
+        for (int i = 0; i < cardYaws.length; i++) {
+            float delta = wrapDegrees(cardYaws[i] - yaw);
+            if (Math.abs(delta) > 90.0f) continue;
+            int px = x + 90 + (int) delta;
+            int color = Math.abs(delta) <= 5.0f ? 0xFFFFFF55 : 0xFFFFFFFF;
+            int labelWidth = font.width(cardLabels[i]);
+            graphics.text(font, cardLabels[i], px - labelWidth / 2, y + 3, color, true);
+        }
+
+        graphics.fill(x + 89, y + 11, x + 92, y + 14, 0xFFFFFFFF);
+    }
+
+    private static void renderWatermark(GuiGraphicsExtractor graphics, DeltaTracker deltaTracker) {
+        Minecraft mc = Minecraft.getInstance();
+        if (mc.level == null) return;
+        Font font = mc.font;
+        int x = 4;
+        int y = 4;
+        int lineHeight = font.lineHeight + 2;
+
+        String nick = resolveNick(mc);
+        int fps = mc.getFps();
+        int ping = resolvePing(mc);
+
+        graphics.text(font, nick, x, y, 0xFFFFFFFF, true);
+        graphics.text(font, "FPS: " + fps, x, y + lineHeight, 0xFFFFFFFF, true);
+        graphics.text(font, "Ping: " + ping + " ms", x, y + 2 * lineHeight, 0xFFFFFFFF, true);
+    }
+
+    private static String resolveNick(Minecraft mc) {
+        if (mc.player != null) {
+            GameProfile profile = mc.player.getGameProfile();
+            if (profile != null && profile.name() != null && !profile.name().isBlank()) {
+                return profile.name();
+            }
+        }
+        if (mc.getUser() != null) {
+            String name = mc.getUser().getName();
+            if (name != null && !name.isBlank()) {
+                return name;
+            }
+        }
+        return "—";
+    }
+
+    private static int resolvePing(Minecraft mc) {
+        if (mc.getConnection() == null || mc.getUser() == null) return 0;
+        PlayerInfo info = mc.getConnection().getPlayerInfo(mc.getUser().getProfileId());
+        return info == null ? 0 : info.getLatency();
+    }
+
+    private static float wrapDegrees(float v) {
+        v = v % 360.0f;
+        if (v >= 180.0f) v -= 360.0f;
+        if (v < -180.0f) v += 360.0f;
+        return v;
+    }
+}