feat: add SMTP email support and fix profile/permissions bugs

internal/permissions/checker.go

@@ -96,13 +96,14 @@ func (c *Checker) CheckChannelPermission(ctx context.Context, serverID, userID,
 	}
 
 	// Layer channel overrides: apply deny first (subtract), then allow (add).
-	// Role-based overrides from all user roles, then user-specific override.
+	// Role-based overrides from all user roles, plus the @everyone role, then user-specific override.
 	rows, err := c.db.QueryContext(ctx, `
 		SELECT co.allow_bitflags, co.deny_bitflags
 		FROM channel_overrides co
 		WHERE co.channel_id = $1 AND co.target_type = 'role'
-		AND co.target_id IN (
-			SELECT mr.role_id FROM member_roles mr WHERE mr.user_id = $2 AND mr.server_id = $3
+		AND (
+			co.target_id IN (SELECT mr.role_id FROM member_roles mr WHERE mr.user_id = $2 AND mr.server_id = $3)
+			OR co.target_id = (SELECT id FROM roles WHERE server_id = $3 AND is_default = TRUE LIMIT 1)
 		)
 	`, channelID, userID, serverID)
 	if err != nil {