feat: full feature suite — welcome, modmail, security, staff, avis, rules, links, shop, custom

features/shared.py: per-guild JSON config store
features/welcome.py: on_member_join message + invite tracking + /invites
features/modmail.py: DM-based tickets with staff relay
features/security.py: antiraid (join rate detection), ban protection, join/leave log
features/staff.py: staff ranks, promote/demote, /staff_list
features/avis.py: /avis modal -> embed in configured channel
features/rules.py: /rules_setup with accept button + role assignment
features/links.py: /links panel, /links_setup, /links_remove
features/shop.py: /shop_announce new product embeds
features/custom.py: /botstatus, /custom_send, /embed

features/shared.py

@@ -0,0 +1,58 @@
+from __future__ import annotations
+
+import json
+import threading
+from pathlib import Path
+
+from config import DATA_DIR
+
+FEATURES_DIR = DATA_DIR / "features"
+_LOCK = threading.Lock()
+_cache: dict = {}
+
+
+def _ensure():
+    FEATURES_DIR.mkdir(parents=True, exist_ok=True)
+
+
+def _path(guild_id: int) -> Path:
+    return FEATURES_DIR / f"{guild_id}.json"
+
+
+def get(guild_id: int, key: str = "") -> dict:
+    with _LOCK:
+        _ensure()
+        if guild_id not in _cache:
+            f = _path(guild_id)
+            if f.exists():
+                with open(f, "r", encoding="utf-8") as fh:
+                    _cache[guild_id] = json.load(fh)
+            else:
+                _cache[guild_id] = {}
+        data = _cache[guild_id]
+        return data.get(key, {}) if key else data
+
+
+def set(guild_id: int, key: str, value) -> None:
+    with _LOCK:
+        _ensure()
+        if guild_id not in _cache:
+            f = _path(guild_id)
+            if f.exists():
+                with open(f, "r", encoding="utf-8") as fh:
+                    _cache[guild_id] = json.load(fh)
+            else:
+                _cache[guild_id] = {}
+        _cache[guild_id][key] = value
+        _save(guild_id)
+
+
+def _save(guild_id: int) -> None:
+    _ensure()
+    with open(_path(guild_id), "w", encoding="utf-8") as fh:
+        json.dump(_cache[guild_id], fh, indent=2, ensure_ascii=False)
+
+
+def section(guild_id: int, name: str) -> dict:
+    data = get(guild_id)
+    return data.get(name, {})