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/modmail.py

@@ -0,0 +1,125 @@
+from __future__ import annotations
+
+import contextlib
+import logging
+
+import discord
+from discord import app_commands
+from discord.ext import commands
+
+from features import shared
+
+logger = logging.getLogger("vision")
+
+_open_tickets: dict[int, int] = {}
+
+
+class ModMail(commands.Cog):
+    def __init__(self, bot: commands.Bot):
+        self.bot = bot
+
+    @commands.Cog.listener()
+    async def on_message(self, message: discord.Message):
+        if message.author.bot or message.guild:
+            return
+
+        cfg = shared.get(0, "modmail")
+        if not cfg.get("enabled"):
+            return
+
+        guild_id = cfg.get("guild_id")
+        if not guild_id:
+            return
+
+        guild = self.bot.get_guild(guild_id)
+        if not guild:
+            return
+
+        existing = _open_tickets.get(message.author.id)
+        if existing:
+            channel = guild.get_channel(existing)
+            if channel:
+                embed = discord.Embed(
+                    description=message.content or "*Pièce jointe*",
+                    color=discord.Color.blurple(),
+                    timestamp=message.created_at,
+                )
+                embed.set_author(name=str(message.author), icon_url=message.author.display_avatar.url)
+                await channel.send(embed=embed)
+                for att in message.attachments:
+                    await channel.send(file=await discord.File(await att.to_file(), filename=att.filename))
+                return
+
+        category_id = cfg.get("category_id")
+        staff_role_id = cfg.get("staff_role_id")
+        category = guild.get_channel(category_id) if category_id else None
+
+        overwrites = {
+            guild.default_role: discord.PermissionOverwrite(view_channel=False),
+            guild.me: discord.PermissionOverwrite(
+                view_channel=True,
+                send_messages=True,
+                read_message_history=True,
+                attach_files=True,
+                manage_channels=True,
+            ),
+            message.author: discord.PermissionOverwrite(
+                view_channel=True, send_messages=True, read_message_history=True
+            ),
+        }
+        if staff_role_id:
+            role = guild.get_role(staff_role_id)
+            if role:
+                overwrites[role] = discord.PermissionOverwrite(
+                    view_channel=True, send_messages=True, read_message_history=True, attach_files=True
+                )
+
+        channel = await guild.create_text_channel(
+            f"modmail-{message.author.name}",
+            category=category,
+            overwrites=overwrites,
+            topic=f"Modmail de {message.author} ({message.author.id})",
+        )
+
+        _open_tickets[message.author.id] = channel.id
+
+        container = discord.ui.Container()
+        container.add_item(
+            discord.ui.TextDisplay(
+                f"## Modmail\n**De :** {message.author.mention}\n**Raison :** {message.content[:500] if message.content else 'Pièce jointe'}"
+            )
+        )
+        view = discord.ui.LayoutView()
+        view.add_item(container)
+
+        mention = message.author.mention
+        if staff_role_id:
+            mention += f" <@&{staff_role_id}>"
+        await channel.send(content=mention, view=view)
+
+        with contextlib.suppress(discord.HTTPException):
+            await message.author.send("Ton message a été envoyé au staff, réponses ici.")
+
+    @app_commands.command(name="modmail_setup", description="Configurer le système de modmail")
+    @app_commands.describe(category="Category pour les tickets", staff_role="Rôle staff")
+    @app_commands.checks.has_permissions(manage_guild=True)
+    async def modmail_setup(
+        self, interaction: discord.Interaction, category: discord.CategoryChannel, staff_role: discord.Role
+    ):
+        shared.set(
+            0,
+            "modmail",
+            {
+                "enabled": True,
+                "guild_id": interaction.guild_id,
+                "category_id": category.id,
+                "staff_role_id": staff_role.id,
+            },
+        )
+        await interaction.response.send_message(
+            f"Modmail configuré : catégorie {category.mention}, staff {staff_role.mention}", ephemeral=True
+        )
+
+
+async def setup(bot: commands.Bot):
+    await bot.add_cog(ModMail(bot))