Refactor: Restructure packages to follow KISS/SOLID principles - gui reorganized into mine/group/confirm/common, core into mine/service/common, command into admin/player/common, data/config/loader into block/entity/region/reward/system. All packages now follow max 6 files per folder rule. Extracted utility classes to reduce file sizes.

src/main/java/dev/loki/lomines/gui/group/GroupCreateGui.java

@@ -0,0 +1,123 @@
+package dev.loki.lomines.gui.group;
+
+import dev.loki.lomines.LoMinesPlugin;
+import dev.loki.lomines.core.mine.Mines;
+import dev.loki.lomines.wand.GroupWandManager;
+import dev.loki.lomines.wand.GroupWandSession;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.Inventory;
+
+/**
+ * 6-row chest: left column = create; center 3×3 = nine sub-mines with shared settings.
+ */
+public final class GroupCreateGui {
+
+    public static final int SLOT_CREATE = 0;
+    public static final int SLOT_INFO = 8;
+    private static final int SIZE = 54;
+    private static final int[] MINE_SLOTS = {10, 11, 12, 19, 20, 21, 28, 29, 30};
+
+    private GroupCreateGui() {}
+
+    public static void open(LoMinesPlugin plugin, Player player) {
+        GroupCreateGuiHolder holder = new GroupCreateGuiHolder(player.getUniqueId());
+        Inventory inv = Bukkit.createInventory(holder, SIZE,
+                Component.text("LoMines · группа (9 шахт)", NamedTextColor.DARK_GREEN));
+        holder.setInventory(inv);
+        fill(plugin, player, inv);
+        player.openInventory(inv);
+    }
+
+    public static void refresh(LoMinesPlugin plugin, Player player, Inventory inv) {
+        fill(plugin, player, inv);
+    }
+
+    private static void fill(LoMinesPlugin plugin, Player player, Inventory inv) {
+        GroupWandSession session = plugin.getGroupWandManager().getSession(player.getUniqueId());
+        for (int i = 0; i < SIZE; i++) {
+            inv.setItem(i, GroupCreateItems.filler());
+        }
+        inv.setItem(SLOT_CREATE, GroupCreateItems.createButton());
+        inv.setItem(SLOT_INFO, GroupCreateItems.infoPaper(session));
+        for (int i = 0; i < MINE_SLOTS.length; i++) {
+            inv.setItem(MINE_SLOTS[i], GroupCreateItems.mineSlotItem(session, i));
+        }
+    }
+
+    public static int mineSlotIndex(int rawSlot) {
+        for (int i = 0; i < MINE_SLOTS.length; i++) {
+            if (MINE_SLOTS[i] == rawSlot) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    public static boolean handleClick(LoMinesPlugin plugin, Player player, int rawSlot) {
+        if (rawSlot < 0 || rawSlot >= SIZE) {
+            return false;
+        }
+        GroupWandManager mgr = plugin.getGroupWandManager();
+        GroupWandSession session = mgr.getSession(player.getUniqueId());
+
+        if (rawSlot == SLOT_CREATE) {
+            runCreate(plugin, player, session);
+            player.closeInventory();
+            return true;
+        }
+
+        int mineIdx = mineSlotIndex(rawSlot);
+        if (mineIdx >= 0) {
+            session.setActiveSlot(mineIdx);
+            Inventory top = player.getOpenInventory().getTopInventory();
+            if (top.getHolder() instanceof GroupCreateGuiHolder) {
+                refresh(plugin, player, top);
+            }
+            player.sendMessage(Component.text("Активный слот палочки: " + (mineIdx + 1), NamedTextColor.YELLOW));
+            return true;
+        }
+        return true;
+    }
+
+    private static void runCreate(LoMinesPlugin plugin, Player player, GroupWandSession session) {
+        if (!session.hasBaseName()) {
+            player.sendMessage(Component.text("Сначала: /lm group <префикс>", NamedTextColor.RED));
+            return;
+        }
+        String base = session.getBaseName();
+        if (!base.matches("^[a-zA-Z0-9_-]+$")) {
+            player.sendMessage(Component.text("Префикс: только латиница, цифры, _ -", NamedTextColor.RED));
+            return;
+        }
+
+        Mines mines = plugin.getMines();
+        int created = 0;
+        int skipped = 0;
+
+        for (int i = 0; i < 9; i++) {
+            if (!session.isSlotReady(i)) continue;
+            String mineName = base + "_" + (i + 1);
+            try {
+                mines.create(mineName, session.getPos1(i), session.getPos2(i));
+                created++;
+            } catch (IllegalArgumentException e) {
+                player.sendMessage(Component.text("Пропуск (уже есть): " + mineName, NamedTextColor.GOLD));
+                skipped++;
+            } catch (Exception e) {
+                player.sendMessage(Component.text("Ошибка " + mineName + ": " + e.getMessage(), NamedTextColor.RED));
+                plugin.loLogger().error("Group create failed for " + mineName, e);
+            }
+        }
+
+        if (created == 0) {
+            player.sendMessage(Component.text("Нет готовых слотов (2 точки в каждом).", NamedTextColor.RED));
+            return;
+        }
+        player.sendMessage(Component.text(
+                "Создано шахт: " + created + (skipped > 0 ? " (пропущено: " + skipped + ")" : ""),
+                NamedTextColor.GREEN));
+    }
+}