fix: ship group zero tech levels

internal/controller/ship_group.go

@@ -519,16 +519,33 @@ TODO: Точность тех. уровней корабля
 а не округлённые уровни технологий.
 */
 func (c *Cache) unsafeCreateShips(ri int, classID uuid.UUID, planet uint, quantity uint) {
+	st := c.MustShipType(ri, classID)
+	// TODO: test new group levels
+	level := func(t game.Tech) float64 {
+		if t == game.TechDrive && st.DriveBlockMass() > 0 {
+			return c.g.Race[ri].TechLevel(game.TechDrive)
+		}
+		if t == game.TechWeapons && st.WeaponsBlockMass() > 0 {
+			return c.g.Race[ri].TechLevel(game.TechDrive)
+		}
+		if t == game.TechShields && st.ShieldsBlockMass() > 0 {
+			return c.g.Race[ri].TechLevel(game.TechDrive)
+		}
+		if t == game.TechCargo && st.CargoBlockMass() > 0 {
+			return c.g.Race[ri].TechLevel(game.TechDrive)
+		}
+		return 0
+	}
 	c.appendShipGroup(ri, &game.ShipGroup{
 		OwnerID:     c.g.Race[ri].ID,
 		TypeID:      classID,
 		Destination: planet,
 		Number:      uint(quantity),
 		Tech: map[game.Tech]game.Float{
-			game.TechDrive:   game.F(c.g.Race[ri].TechLevel(game.TechDrive)),
-			game.TechWeapons: game.F(c.g.Race[ri].TechLevel(game.TechWeapons)),
-			game.TechShields: game.F(c.g.Race[ri].TechLevel(game.TechShields)),
-			game.TechCargo:   game.F(c.g.Race[ri].TechLevel(game.TechCargo)),
+			game.TechDrive:   game.F(level(game.TechDrive)),
+			game.TechWeapons: game.F(level(game.TechWeapons)),
+			game.TechShields: game.F(level(game.TechShields)),
+			game.TechCargo:   game.F(level(game.TechCargo)),
 		},
 	})
 }