ui/phase-22: races table with stance toggle and vote slot

Adds the Races View in the in-game shell. The table lists every
non-extinct other race with tech levels (percent), totals,
planets, votes received, and a per-row WAR | PEACE segmented
control. A single vote-recipient slot above the table queues a
`CommandRaceVote`; per-row buttons queue `CommandRaceRelation`.
Both commands flow through the existing order draft store with
collapse-by-acceptor (stance) and singleton (vote) rules.

`GameReport` widens with `races`, `myVotes`, `myVoteFor`; the
decoder walks `report.player[]` once for the richer projection.
The optimistic overlay flips stance and vote target immediately;
`votesReceived`, `myVotes`, and the alliance summary stay
server-authoritative — alliance grouping and the 2/3 victory
check are tallied on the server at turn cutoff and explicitly
not surfaced client-side (`rules.txt` keeps foreign races'
outgoing vote targets private).

Includes Vitest component coverage of stance and vote
collapse rules + a Playwright e2e that drives both commands
through the dispatcher route and verifies the gateway saw the
expected `CommandRaceRelation` / `CommandRaceVote` payloads.

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

ui/frontend/tests/helpers/empty-ship-groups.ts

@@ -1,13 +1,15 @@
-// EMPTY_SHIP_GROUPS supplies empty arrays for the ancillary report
-// fields added in Phase 19 (ship-groups + fleets) and Phase 21
-// (sciences). Test fixtures spread it into their report objects so
-// the fixture body still focuses on the fields under test, without
-// forcing every spec to enumerate the full GameReport surface.
+// EMPTY_SHIP_GROUPS supplies empty arrays / zero defaults for the
+// ancillary report fields added in Phase 19 (ship-groups + fleets),
+// Phase 21 (sciences), and Phase 22 (races / diplomacy / voting).
+// Test fixtures spread it into their report objects so the fixture
+// body still focuses on the fields under test, without forcing
+// every spec to enumerate the full GameReport surface.
 
 import type {
 	ReportIncomingShipGroup,
 	ReportLocalFleet,
 	ReportLocalShipGroup,
+	ReportOtherRace,
 	ReportOtherShipGroup,
 	ReportUnidentifiedShipGroup,
 	ScienceSummary,
@@ -21,6 +23,9 @@ export const EMPTY_SHIP_GROUPS: {
 	localFleets: ReportLocalFleet[];
 	otherRaces: string[];
 	localScience: ScienceSummary[];
+	races: ReportOtherRace[];
+	myVotes: number;
+	myVoteFor: string;
 } = {
 	localShipGroups: [],
 	otherShipGroups: [],
@@ -29,4 +34,7 @@ export const EMPTY_SHIP_GROUPS: {
 	localFleets: [],
 	otherRaces: [],
 	localScience: [],
+	races: [],
+	myVotes: 0,
+	myVoteFor: "",
 };