feat: add /drama-leaderboard command with historical composite scoring

Queries Messages, AnalysisResults, and Actions tables to rank users by a
composite drama score (weighted avg toxicity, peak toxicity, and action rate).
Public command with configurable time period (7d/30d/90d/all-time).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

cogs/commands.py

@@ -669,6 +669,78 @@ class CommandsCog(commands.Cog):
             old_mode, mode, interaction.user.display_name,
         )
 
+    @app_commands.command(
+        name="drama-leaderboard",
+        description="Show the all-time drama leaderboard for the server.",
+    )
+    @app_commands.describe(period="Time period to rank (default: 30d)")
+    @app_commands.choices(period=[
+        app_commands.Choice(name="Last 7 days", value="7d"),
+        app_commands.Choice(name="Last 30 days", value="30d"),
+        app_commands.Choice(name="Last 90 days", value="90d"),
+        app_commands.Choice(name="All time", value="all"),
+    ])
+    async def drama_leaderboard(
+        self, interaction: discord.Interaction, period: app_commands.Choice[str] | None = None,
+    ):
+        await interaction.response.defer()
+
+        period_val = period.value if period else "30d"
+        if period_val == "all":
+            days = None
+            period_label = "All Time"
+        else:
+            days = int(period_val.rstrip("d"))
+            period_label = f"Last {days} Days"
+
+        rows = await self.bot.db.get_drama_leaderboard(interaction.guild.id, days)
+        if not rows:
+            await interaction.followup.send(
+                f"No drama data for **{period_label}**. Everyone's been suspiciously well-behaved."
+            )
+            return
+
+        # Compute composite score for each user
+        scored = []
+        for r in rows:
+            avg_tox = r["avg_toxicity"]
+            max_tox = r["max_toxicity"]
+            msg_count = r["messages_analyzed"]
+            action_weight = r["warnings"] + r["mutes"] * 2 + r["off_topic"] * 0.5
+            action_rate = min(1.0, action_weight / msg_count * 10) if msg_count > 0 else 0.0
+            composite = avg_tox * 0.4 + max_tox * 0.2 + action_rate * 0.4
+            scored.append({**r, "composite": composite, "action_rate": action_rate})
+
+        scored.sort(key=lambda x: x["composite"], reverse=True)
+        top = scored[:10]
+
+        medals = ["🥇", "🥈", "🥉"]
+        lines = []
+        for i, entry in enumerate(top):
+            rank = medals[i] if i < 3 else f"`{i + 1}.`"
+
+            # Resolve display name from guild if possible
+            member = interaction.guild.get_member(entry["user_id"])
+            name = member.display_name if member else entry["username"]
+
+            lines.append(
+                f"{rank} **{entry['composite']:.2f}** — {name}\n"
+                f"　Avg: {entry['avg_toxicity']:.2f} | "
+                f"Peak: {entry['max_toxicity']:.2f} | "
+                f"⚠️ {entry['warnings']} | "
+                f"🔇 {entry['mutes']} | "
+                f"📢 {entry['off_topic']}"
+            )
+
+        embed = discord.Embed(
+            title=f"Drama Leaderboard — {period_label}",
+            description="\n".join(lines),
+            color=discord.Color.orange(),
+        )
+        embed.set_footer(text=f"{len(rows)} users tracked | {sum(r['messages_analyzed'] for r in rows)} messages analyzed")
+
+        await interaction.followup.send(embed=embed)
+
     @bcs_mode.autocomplete("mode")
     async def _mode_autocomplete(
         self, interaction: discord.Interaction, current: str,