ui/phase-20: ship-group inspector actions

Eight ship-group operations land on the inspector behind a single
inline-form panel: split, send, load, unload, modernize, dismantle,
transfer, join fleet. Each action either appends a typed command to
the local order draft or surfaces a tooltip explaining the
disabled state. Partial-ship operations emit an implicit
breakShipGroup command before the targeted action so the engine
sees a clean (Break, Action) pair on the wire.

`pkg/calc.BlockUpgradeCost` migrates from
`game/internal/controller/ship_group_upgrade.go` so the calc
bridge can wrap a pure pkg/calc formula; the controller now
imports it. The bridge surfaces the function as
`core.blockUpgradeCost`, which the inspector calls once per ship
block to render the modernize cost preview.

`GameReport.otherRaces` is decoded from the report's player block
(non-extinct, ≠ self) and feeds the transfer-to-race picker. The
planet inspector's stationed-ship rows become clickable for own
groups so the actions panel is reachable from the standard click
flow (the renderer continues to hide on-planet groups).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ui/frontend/src/lib/sidebar/order-tab.svelte

@@ -77,9 +77,57 @@ Tests exercise the tab through `__galaxyDebug.seedOrderDraft`
 				return i18n.t("game.sidebar.order.label.ship_class_remove", {
 					name: cmd.name,
 				});
+			case "breakShipGroup":
+				return i18n.t("game.sidebar.order.label.ship_group_break", {
+					group: shortGroupId(cmd.groupId),
+					quantity: String(cmd.quantity),
+				});
+			case "sendShipGroup":
+				return i18n.t("game.sidebar.order.label.ship_group_send", {
+					group: shortGroupId(cmd.groupId),
+					destination: String(cmd.destinationPlanetNumber),
+				});
+			case "loadShipGroup":
+				return i18n.t("game.sidebar.order.label.ship_group_load", {
+					group: shortGroupId(cmd.groupId),
+					cargo: cmd.cargo,
+					quantity: String(cmd.quantity),
+				});
+			case "unloadShipGroup":
+				return i18n.t("game.sidebar.order.label.ship_group_unload", {
+					group: shortGroupId(cmd.groupId),
+					quantity: String(cmd.quantity),
+				});
+			case "upgradeShipGroup":
+				return i18n.t("game.sidebar.order.label.ship_group_upgrade", {
+					group: shortGroupId(cmd.groupId),
+					tech: cmd.tech,
+					level: String(cmd.level),
+				});
+			case "dismantleShipGroup":
+				return i18n.t("game.sidebar.order.label.ship_group_dismantle", {
+					group: shortGroupId(cmd.groupId),
+				});
+			case "transferShipGroup":
+				return i18n.t("game.sidebar.order.label.ship_group_transfer", {
+					group: shortGroupId(cmd.groupId),
+					acceptor: cmd.acceptor,
+				});
+			case "joinFleetShipGroup":
+				return i18n.t("game.sidebar.order.label.ship_group_join_fleet", {
+					group: shortGroupId(cmd.groupId),
+					fleet: cmd.name,
+				});
 		}
 	}
 
+	// Short identifier for the order-tab so the human-readable label
+	// stays glanceable; the full UUID is still in the underlying
+	// command and visible in the inspector overlay.
+	function shortGroupId(uuid: string): string {
+		return uuid.length > 8 ? uuid.slice(0, 8) : uuid;
+	}
+
 	function statusOf(cmd: OrderCommand): CommandStatus {
 		return draft?.statuses[cmd.id] ?? "draft";
 	}