ui/phase-11: map wired to live game state

Replaces the Phase 10 map stub with live planet rendering driven by
`user.games.report`, and wires the header turn counter to the same
data. Phase 11's frontend sits on a per-game `GameStateStore` that
lives in `lib/game-state.svelte.ts`: the in-game shell layout
instantiates one per game, exposes it through Svelte context, and
disposes it on remount. The store discovers the game's current turn
through `lobby.my.games.list`, fetches the matching report, and
exposes a TS-friendly snapshot to the header turn counter, the map
view, and the inspector / order / calculator tabs that later phases
will plug onto the same instance.

The pipeline forced one cross-stage decision: the user surface needs
the current turn number to know which report to fetch, but
`GameSummary` did not expose it. Phase 11 extends the lobby
catalogue (FB schema, transcoder, Go model, backend
gameSummaryWire, gateway decoders, openapi, TS bindings,
api/lobby.ts) with `current_turn:int32`. The data was already
tracked in backend's `RuntimeSnapshot.CurrentTurn`; surfacing it is
a wire change only. Two alternatives were rejected: a brand-new
`user.games.state` message (full wire-flow for one field) and
hard-coding `turn=0` (works for the dev sandbox, which never
advances past zero, but renders the initial state for any real
game). The change crosses Phase 8's already-shipped catalogue per
the project's "decisions baked back into the live plan" rule —
existing tests and fixtures are updated in the same patch.

The state binding lives in `map/state-binding.ts::reportToWorld`:
one Point primitive per planet across all four kinds (local /
other / uninhabited / unidentified) with distinct fill colours,
fill alphas, and point radii so the user can tell them apart at a
glance. The planet engine number is reused as the primitive id so
a hit-test result resolves directly to a planet without an extra
lookup table. Zero-planet reports yield a well-formed empty world;
malformed dimensions fall back to 1×1 so a bad report cannot crash
the renderer.

The map view's mount effect creates the renderer once and skips
re-mount on no-op refreshes (same turn, same wrap mode); a turn
change or wrap-mode flip disposes and recreates it. The renderer's
external API does not yet expose `setWorld`; Phase 24 / 34 will
extract it once high-frequency updates land. The store installs a
`visibilitychange` listener that calls `refresh()` when the tab
regains focus.

Wrap-mode preference uses `Cache` namespace `game-prefs`, key
`<gameId>/wrap-mode`, default `torus`. Phase 11 reads through
`store.wrapMode`; Phase 29 wires the toggle UI on top of
`setWrapMode`.

Tests: Vitest unit coverage for `reportToWorld` (every kind,
ids, styling, empty / zero-dimension edges, priority order) and
for the store lifecycle (init success, missing-membership error,
forbidden-result error, `setTurn`, wrap-mode persistence across
instances, `failBootstrap`). Playwright e2e mocks the gateway for
`lobby.my.games.list` and `user.games.report` and asserts the
live data path: turn counter shows the reported turn,
`active-view-map` flips to `data-status="ready"`, and
`data-planet-count` matches the fixture count. The zero-planet
regression and the missing-membership error path are covered.

Phase 11 status stays `pending` in `ui/PLAN.md` until the local-ci
run lands green; flipping to `done` follows in the next commit per
the per-stage CI gate in `CLAUDE.md`.

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

pkg/schema/fbs/lobby.fbs

@@ -6,7 +6,11 @@ namespace lobby;
 
 // GameSummary stores one game record returned by the lobby list
 // endpoints. owner_user_id is empty for public games (no human owner).
-// The shape matches `lobby/openapi.yaml` `MyGameSummary`.
+// current_turn carries the runtime's most recent observed turn number
+// (zero before the engine produces its first snapshot); the user
+// surface uses it to read the corresponding `user.games.report`
+// without an extra round-trip. The shape matches `lobby/openapi.yaml`
+// `MyGameSummary`.
 table GameSummary {
   game_id:string;
   game_name:string;
@@ -18,6 +22,7 @@ table GameSummary {
   enrollment_ends_at_ms:int64;
   created_at_ms:int64;
   updated_at_ms:int64;
+  current_turn:int32;
 }
 
 // MyGamesListRequest stores the authenticated read request for the

pkg/schema/fbs/lobby/GameSummary.go

@@ -141,8 +141,20 @@ func (rcv *GameSummary) MutateUpdatedAtMs(n int64) bool {
 	return rcv._tab.MutateInt64Slot(22, n)
 }
 
+func (rcv *GameSummary) CurrentTurn() int32 {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(24))
+	if o != 0 {
+		return rcv._tab.GetInt32(o + rcv._tab.Pos)
+	}
+	return 0
+}
+
+func (rcv *GameSummary) MutateCurrentTurn(n int32) bool {
+	return rcv._tab.MutateInt32Slot(24, n)
+}
+
 func GameSummaryStart(builder *flatbuffers.Builder) {
-	builder.StartObject(10)
+	builder.StartObject(11)
 }
 func GameSummaryAddGameId(builder *flatbuffers.Builder, gameId flatbuffers.UOffsetT) {
 	builder.PrependUOffsetTSlot(0, flatbuffers.UOffsetT(gameId), 0)
@@ -174,6 +186,9 @@ func GameSummaryAddCreatedAtMs(builder *flatbuffers.Builder, createdAtMs int64)
 func GameSummaryAddUpdatedAtMs(builder *flatbuffers.Builder, updatedAtMs int64) {
 	builder.PrependInt64Slot(9, updatedAtMs, 0)
 }
+func GameSummaryAddCurrentTurn(builder *flatbuffers.Builder, currentTurn int32) {
+	builder.PrependInt32Slot(10, currentTurn, 0)
+}
 func GameSummaryEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
 	return builder.EndObject()
 }