feat: death:recovery-roll socket handler — d20 save, 18+ stands at 1 HP

server/src/socket.ts

@@ -154,6 +154,96 @@ export function setupSocket(io: Server) {
       io.to(`campaign:${campaignId}`).emit("atmosphere:update", atmosphere);
     });
 
+    socket.on("death:recovery-roll", async (data: {
+      campaignId: number;
+      characterId: number;
+    }) => {
+      const userId = socket.data.user?.userId;
+
+      // Verify caller is DM
+      const [memberRows] = await db.execute<RowDataPacket[]>(
+        "SELECT role FROM campaign_members WHERE campaign_id = ? AND user_id = ?",
+        [data.campaignId, userId]
+      );
+      if (memberRows.length === 0 || memberRows[0].role !== "dm") return;
+
+      // Verify character has a Dying condition
+      const [dyingRows] = await db.execute<RowDataPacket[]>(
+        "SELECT id FROM character_conditions WHERE character_id = ? AND name = 'Dying'",
+        [data.characterId]
+      );
+      if (dyingRows.length === 0) return;
+
+      // Get character info for roll log
+      const [charRows] = await db.execute<RowDataPacket[]>(
+        "SELECT name, color, campaign_id FROM characters WHERE id = ?",
+        [data.characterId]
+      );
+      if (charRows.length === 0) return;
+      const char = charRows[0];
+
+      // Roll d20 server-side
+      const result = rollDice("1d20");
+      const roll = result.total;
+      const nat20 = roll === 20;
+      const success = roll >= 18;
+
+      // Log to roll_log with "Death Save" label (success gets suffix)
+      const label = success ? "Death Save \u2014 stands at 1 HP!" : "Death Save";
+
+      const [insertResult] = await db.execute<import("mysql2").ResultSetHeader>(
+        `INSERT INTO roll_log
+           (campaign_id, character_id, character_name, character_color, type, label,
+            dice_expression, rolls, modifier, total, advantage, disadvantage, nat20)
+         VALUES (?, ?, ?, ?, 'custom', ?, '1d20', ?, 0, ?, 0, 0, ?)`,
+        [
+          data.campaignId,
+          data.characterId,
+          char.name,
+          char.color,
+          label,
+          JSON.stringify(result.rolls),
+          roll,
+          nat20 ? 1 : 0,
+        ]
+      );
+
+      const [savedRows] = await db.execute<RowDataPacket[]>(
+        "SELECT * FROM roll_log WHERE id = ?",
+        [insertResult.insertId]
+      );
+
+      io.to(`campaign:${data.campaignId}`).emit("roll:result", {
+        ...savedRows[0],
+        rolls: result.rolls,
+        advantage: false,
+        disadvantage: false,
+        nat20,
+      });
+
+      // On 18+: heal to 1 HP and clear Dying condition
+      if (success) {
+        await db.execute("UPDATE characters SET hp_current = 1 WHERE id = ?", [data.characterId]);
+        await db.execute(
+          "DELETE FROM character_conditions WHERE character_id = ? AND name = 'Dying'",
+          [data.characterId]
+        );
+
+        const [updatedChar] = await db.execute<RowDataPacket[]>(
+          "SELECT * FROM characters WHERE id = ?",
+          [data.characterId]
+        );
+        const [updatedConditions] = await db.execute<RowDataPacket[]>(
+          "SELECT * FROM character_conditions WHERE character_id = ?",
+          [data.characterId]
+        );
+        io.to(`campaign:${data.campaignId}`).emit("character:updated", {
+          ...updatedChar[0],
+          conditions: updatedConditions,
+        });
+      }
+    });
+
     socket.on("disconnect", () => {
       // Rooms are cleaned up automatically by Socket.IO
     });