fix(game): fight before departure and reorder the turn sequence

Per the documented turn order (game/rules.txt "Последовательность
действий"), no ship should dodge the pre-departure battle by slipping
into hyperspace. MakeTurn now runs merge -> battle -> load+launch routed
groups -> fly -> merge -> battle, so:

- ships ordered to depart (Launched) and ships being upgraded now take
  part in the pre-departure battle at their planet (CollectPlanetGroups /
  FilterBattleGroups); only survivors then enter hyperspace;
- routed transports are loaded and launched AFTER that battle, so they
  fight empty and cannot escape it.

A just-launched group has no stored hyperspace position, so moveShipGroup
starts its first leg from the origin planet; the previous code read the
nil launch coordinate and would panic.

Because upgrading groups can now lose ships in the battle, the pending
upgrade cost is recomputed from the group's current ship count instead of
the value stored when the order was validated.

Rules: reordered "Последовательность действий" and rewrote the combat
note that ordered/routed ships skip the battle.

Tests: launched-group move from origin, launched/upgrade groups taking
part in battle, upgrade cost tracking ship losses.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

game/internal/controller/ship_group_move_test.go

@@ -45,3 +45,20 @@ func TestListMoveableGroupIds(t *testing.T) {
 		assert.NotEqual(t, game.StateTransfer, sg.State())
 	}
 }
+
+// TestMoveLaunchedGroupFromOrigin guards the launched-coordinate fix: a group
+// just sent by an order is Launched with no stored hyperspace position, so its
+// first leg must start from the origin planet. The pre-fix code dereferenced
+// the nil launch coordinate and panicked.
+func TestMoveLaunchedGroupFromOrigin(t *testing.T) {
+	c, g := newCache()
+	assert.NoError(t, c.CreateShips(Race_0_idx, ShipType_Cruiser, R0_Planet_0_num, 1))
+	assert.NoError(t, g.ShipGroupSend(Race_0.Name, c.ShipGroup(0).ID, R0_Planet_2_num))
+	assert.Equal(t, game.StateLaunched, c.ShipGroup(0).State())
+
+	// Must not panic on the nil launch coordinate. Planet_0 (1,1) -> Planet_2
+	// (3,3) is ~2.83 ly; a Cruiser covers it in one turn and arrives.
+	c.MoveShipGroups()
+	assert.Equal(t, game.StateInOrbit, c.ShipGroup(0).State())
+	assert.Equal(t, R0_Planet_2_num, c.ShipGroup(0).Destination)
+}