feat(ui): Phase 29 map visibility toggles

Adds the gear-icon popover on the map view with per-game persistence
of every category toggle plus the wrap-mode radio. Hide-by-id and
visibility-fog facilities land on the renderer so every flip applies
within one frame without a Pixi remount; the wrap-mode toggle keeps
its existing remount + camera-preserve path. A new server-side turn
force-resets every flag to defaults so a hidden category never makes
the player miss the next turn's news.

Also fixes the FligthDistance → FlightDistance typo in pkg/calc/race.go
(plus the single Go caller); the TS side keeps duplicating the formula
until a race-level WASM bridge lands.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ui/docs/game-state.md

@@ -116,6 +116,44 @@ explores history, so the pending-turn toast continues to work.
 map view's effect picks the change up and re-mounts the renderer
 with the new mode.
 
+## Map visibility toggles
+
+Phase 29 adds a `mapToggles: MapToggles` rune that drives the
+gear popover in the map view. Every flag defaults to `true` —
+including `unreachablePlanets` (showing every planet by default)
+and `visibilityFog` (the fog overlay on by default). The
+exhaustive shape lives in `src/lib/game-state.svelte.ts`; the
+gear popover (`src/lib/active-view/map-toggles.svelte`) is a
+thin view of the rune.
+
+`setMapToggle(key, value)` flips one entry in place and
+persists the whole blob to `Cache` under the
+`game-map-toggles/{gameId}` key. The blob carries a companion
+`lastResetTurn` number — the turn at which the toggles were last
+reset to defaults — so the new-turn reset path (below) can detect
+a stale blob even across a cross-session gap.
+
+### New-turn reset
+
+A new server-side turn force-resets every toggle to defaults so a
+hidden category never makes the player miss what changed:
+
+- `setGame` reads the persisted `{toggles, lastResetTurn}` blob.
+  If `lastResetTurn < currentTurn`, the rune is overwritten with
+  `DEFAULT_MAP_TOGGLES` and the blob is rewritten with
+  `lastResetTurn = currentTurn` before the report load. Otherwise
+  the persisted overrides are restored.
+- `advanceToPending` (the user's explicit jump onto the new turn)
+  calls the same reset path after `loadTurn(currentTurn, …)`
+  succeeds, updating `lastResetTurn` to the freshly-loaded
+  current turn.
+- `viewTurn` (history mode) does NOT reset — toggles are a
+  single shared state per game, not per turn.
+- `refresh()` does not advance turns, so it does not reset.
+
+The cache namespace and blob shape are documented in
+`storage.md`.
+
 ## History mode
 
 Phase 26 lets the user step backward through the report timeline