feat(stats): per-game hints used + lifetime moves and hint share

Store the hints a player used in each game, and add two lifetime tiles —
Moves and Hint share — to the statistics screen.

- per-game: game_players.hints_used now counts EVERY hint (allowance + wallet),
  not just the free allowance, so it is the seat's true total hints used this
  game. The allowance decision (used < HintsPerPlayer) and the hint badge values
  (hints_remaining / wallet_balance) are unchanged — the lobby hint-count fix does
  NOT regress; only the admin "hints used" column, which silently under-counted
  wallet hints, becomes accurate.
- account_stats gains two summed counters: moves (the player's plays — passes and
  exchanges excluded) and hints_used (every hint). Computed at game finish in
  buildStats over the same non-guest, non-honest-AI games as the rest of the stats.
- wire: StatsView gains moves + hints_used (trailing); gateway + UI codec + model;
  regen.
- ui: two tiles (Moves, Hint share = hints_used/moves, one-decimal % in the active
  locale); card order games·wins·draws·losses·moves·hint-share·best game·win-rate.
- docs: ARCHITECTURE §9 + baseline comment, FUNCTIONAL (+ru), UI_DESIGN.

Tests: TestHintPolicy (hints_used counts the wallet hint), TestGameLifecycleAndStats
(moves>0, hints=0), gateway stats round-trip, UI hintShare unit + codec + e2e.

backend/internal/account/stats.go

@@ -46,7 +46,11 @@ type Stats struct {
 	Draws         int
 	MaxGamePoints int
 	MaxWordPoints int
-	BestMoves     []BestMove
+	// Moves is the lifetime count of the account's plays (tile placements); HintsUsed is the
+	// lifetime count of hints taken. The statistics screen shows the hint share (HintsUsed / Moves).
+	Moves     int
+	HintsUsed int
+	BestMoves []BestMove
 }
 
 // GetStats returns the lifetime statistics for id. An account with no account_stats
@@ -74,6 +78,8 @@ func (s *Store) GetStats(ctx context.Context, id uuid.UUID) (Stats, error) {
 		Draws:         int(row.Draws),
 		MaxGamePoints: int(row.MaxGamePoints),
 		MaxWordPoints: int(row.MaxWordPoints),
+		Moves:         int(row.Moves),
+		HintsUsed:     int(row.HintsUsed),
 		BestMoves:     best,
 	}, nil
 }

backend/internal/game/service.go

@@ -1027,12 +1027,7 @@ func (svc *Service) Hint(ctx context.Context, gameID, accountID uuid.UUID) (Hint
 	}
 
 	walletAfter := acc.HintBalance
-	if fromAllowance {
-		if err := svc.store.SpendHintAllowance(ctx, gameID, seat); err != nil {
-			return HintResult{}, err
-		}
-		used++
-	} else {
+	if !fromAllowance {
 		spent, err := svc.accounts.SpendHint(ctx, accountID)
 		if err != nil {
 			return HintResult{}, err
@@ -1042,6 +1037,13 @@ func (svc *Service) Hint(ctx context.Context, gameID, accountID uuid.UUID) (Hint
 		}
 		walletAfter--
 	}
+	// hints_used is the per-game total (allowance + wallet): every hint increments it. The first
+	// HintsPerPlayer hints are the free allowance (so fromAllowance above stays correct); the rest
+	// are charged to the wallet. Counting all hints feeds the player's lifetime hint statistics.
+	if err := svc.store.IncHintsUsed(ctx, gameID, seat); err != nil {
+		return HintResult{}, err
+	}
+	used++
 	return HintResult{Move: move, HintsRemaining: hintsRemaining(pre.HintsPerPlayer, used, walletAfter), WalletBalance: walletAfter}, nil
 }
 
@@ -1429,10 +1431,12 @@ func buildStats(g *engine.Game, seats []Seat) []statDelta {
 	res := g.Result()
 	bestRec := make(map[int]engine.MoveRecord)
 	blanks := make(map[[2]int]bool)
+	plays := make(map[int]int) // per player: count of plays (tile placements), for the "moves" stat
 	for _, rec := range g.Log() {
 		if rec.Action != engine.ActionPlay {
 			continue
 		}
+		plays[rec.Player]++
 		for _, t := range rec.Tiles {
 			if t.Blank {
 				blanks[[2]int{t.Row, t.Col}] = true
@@ -1446,7 +1450,9 @@ func buildStats(g *engine.Game, seats []Seat) []statDelta {
 	values := letterValues(g.Variant())
 	out := make([]statDelta, 0, len(seats))
 	for _, s := range seats {
-		d := statDelta{accountID: s.AccountID, gamePoints: g.Score(s.Seat)}
+		// moves counts the seat's plays; hintsUsed is the seat's total hints this game. Both are
+		// summed into account_stats so the screen can show the hint share (hints_used / moves).
+		d := statDelta{accountID: s.AccountID, gamePoints: g.Score(s.Seat), moves: plays[s.Seat], hintsUsed: s.HintsUsed}
 		if rec, ok := bestRec[s.Seat]; ok {
 			d.wordPoints = rec.Score
 			if rec.Score > 0 {

backend/internal/game/store.go

@@ -66,6 +66,8 @@ type statDelta struct {
 	draws       int
 	gamePoints  int
 	wordPoints  int
+	moves       int // plays this game (tile placements), summed into account_stats.moves
+	hintsUsed   int // hints used this game (allowance + wallet), summed into account_stats.hints_used
 	bestVariant string
 	bestScore   int
 	bestTiles   []account.BestMoveTile
@@ -729,13 +731,17 @@ func upsertStats(ctx context.Context, tx *sql.Tx, d statDelta, now time.Time) er
 	draws := row.Draws + int32(d.draws)
 	maxGame := max(row.MaxGamePoints, int32(d.gamePoints))
 	maxWord := max(row.MaxWordPoints, int32(d.wordPoints))
+	moves := row.Moves + int32(d.moves)
+	hintsUsed := row.HintsUsed + int32(d.hintsUsed)
 
 	upd := table.AccountStats.UPDATE(
 		table.AccountStats.Wins, table.AccountStats.Losses, table.AccountStats.Draws,
 		table.AccountStats.MaxGamePoints, table.AccountStats.MaxWordPoints, table.AccountStats.UpdatedAt,
+		table.AccountStats.Moves, table.AccountStats.HintsUsed,
 	).SET(
 		postgres.Int(int64(wins)), postgres.Int(int64(losses)), postgres.Int(int64(draws)),
 		postgres.Int(int64(maxGame)), postgres.Int(int64(maxWord)), postgres.TimestampzT(now),
+		postgres.Int(int64(moves)), postgres.Int(int64(hintsUsed)),
 	).WHERE(table.AccountStats.AccountID.EQ(postgres.UUID(d.accountID)))
 	if _, err := upd.ExecContext(ctx, tx); err != nil {
 		return fmt.Errorf("update stats %s: %w", d.accountID, err)
@@ -774,8 +780,10 @@ func upsertBestMove(ctx context.Context, tx *sql.Tx, d statDelta, now time.Time)
 	return nil
 }
 
-// SpendHintAllowance increments a seat's per-game hint counter by one.
-func (s *Store) SpendHintAllowance(ctx context.Context, gameID uuid.UUID, seat int) error {
+// IncHintsUsed increments a seat's per-game hints-used counter by one. It is called for
+// every hint — both the free per-game allowance and the wallet-charged ones — so the counter
+// is the seat's total hints used this game (the first HintsPerPlayer being the allowance).
+func (s *Store) IncHintsUsed(ctx context.Context, gameID uuid.UUID, seat int) error {
 	stmt := table.GamePlayers.
 		UPDATE(table.GamePlayers.HintsUsed).
 		SET(table.GamePlayers.HintsUsed.ADD(postgres.Int(1))).
@@ -784,7 +792,7 @@ func (s *Store) SpendHintAllowance(ctx context.Context, gameID uuid.UUID, seat i
 				AND(table.GamePlayers.Seat.EQ(postgres.Int(int64(seat)))),
 		)
 	if _, err := stmt.ExecContext(ctx, s.db); err != nil {
-		return fmt.Errorf("game: spend hint allowance: %w", err)
+		return fmt.Errorf("game: increment hints used: %w", err)
 	}
 	return nil
 }

backend/internal/game/types.go

@@ -154,6 +154,8 @@ type Seat struct {
 	Seat      int
 	AccountID uuid.UUID
 	Score     int
+	// HintsUsed is the total hints the seat used this game — both the free per-game allowance
+	// and the wallet-charged ones (the first HintsPerPlayer being the allowance).
 	HintsUsed int
 	IsWinner  bool
 	// DisplayName is the seat's display-name snapshot, captured when the seat was taken

backend/internal/inttest/game_test.go

@@ -150,6 +150,14 @@ func TestGameLifecycleAndStats(t *testing.T) {
 		if err != nil {
 			t.Fatalf("get stats: %v", err)
 		}
+		// The player made at least one scoring play (maxWord > 0), so the moves aggregate is
+		// positive; no hints were taken in this greedy game, so the hints aggregate stays 0.
+		if st.Moves <= 0 {
+			t.Errorf("moves = %d, want > 0", st.Moves)
+		}
+		if st.HintsUsed != 0 {
+			t.Errorf("hints used = %d, want 0 (no hints taken)", st.HintsUsed)
+		}
 		if len(st.BestMoves) != 1 {
 			t.Fatalf("want one best move (only scrabble_en played), got %d: %+v", len(st.BestMoves), st.BestMoves)
 		}
@@ -429,6 +437,15 @@ func TestHintPolicy(t *testing.T) {
 	if res.HintsRemaining != 1 || res.WalletBalance != 1 {
 		t.Errorf("wallet hint: hints=%d wallet=%d, want 1/1", res.HintsRemaining, res.WalletBalance)
 	}
+	// game_players.hints_used counts BOTH hints (1 allowance + 1 wallet) — the per-game total
+	// that feeds the player's lifetime hint statistics, not just the allowance.
+	st2, err := svc.GameState(ctx, g.ID, seats[0])
+	if err != nil {
+		t.Fatalf("state after wallet hint: %v", err)
+	}
+	if got := st2.Game.Seats[0].HintsUsed; got != 2 {
+		t.Errorf("hints_used = %d after allowance + wallet hint, want 2", got)
+	}
 
 	off, err := svc.Create(ctx, game.CreateParams{
 		Variant: engine.VariantEnglish, Seats: seats, TurnTimeout: 24 * time.Hour,

backend/internal/postgres/jet/backend/model/account_stats.go

@@ -20,4 +20,6 @@ type AccountStats struct {
 	MaxGamePoints int32
 	MaxWordPoints int32
 	UpdatedAt     time.Time
+	Moves         int32
+	HintsUsed     int32
 }

backend/internal/postgres/jet/backend/table/account_stats.go

@@ -24,6 +24,8 @@ type accountStatsTable struct {
 	MaxGamePoints postgres.ColumnInteger
 	MaxWordPoints postgres.ColumnInteger
 	UpdatedAt     postgres.ColumnTimestampz
+	Moves         postgres.ColumnInteger
+	HintsUsed     postgres.ColumnInteger
 
 	AllColumns     postgres.ColumnList
 	MutableColumns postgres.ColumnList
@@ -72,9 +74,11 @@ func newAccountStatsTableImpl(schemaName, tableName, alias string) accountStatsT
 		MaxGamePointsColumn = postgres.IntegerColumn("max_game_points")
 		MaxWordPointsColumn = postgres.IntegerColumn("max_word_points")
 		UpdatedAtColumn     = postgres.TimestampzColumn("updated_at")
-		allColumns          = postgres.ColumnList{AccountIDColumn, WinsColumn, LossesColumn, DrawsColumn, MaxGamePointsColumn, MaxWordPointsColumn, UpdatedAtColumn}
-		mutableColumns      = postgres.ColumnList{WinsColumn, LossesColumn, DrawsColumn, MaxGamePointsColumn, MaxWordPointsColumn, UpdatedAtColumn}
-		defaultColumns      = postgres.ColumnList{WinsColumn, LossesColumn, DrawsColumn, MaxGamePointsColumn, MaxWordPointsColumn, UpdatedAtColumn}
+		MovesColumn         = postgres.IntegerColumn("moves")
+		HintsUsedColumn     = postgres.IntegerColumn("hints_used")
+		allColumns          = postgres.ColumnList{AccountIDColumn, WinsColumn, LossesColumn, DrawsColumn, MaxGamePointsColumn, MaxWordPointsColumn, UpdatedAtColumn, MovesColumn, HintsUsedColumn}
+		mutableColumns      = postgres.ColumnList{WinsColumn, LossesColumn, DrawsColumn, MaxGamePointsColumn, MaxWordPointsColumn, UpdatedAtColumn, MovesColumn, HintsUsedColumn}
+		defaultColumns      = postgres.ColumnList{WinsColumn, LossesColumn, DrawsColumn, MaxGamePointsColumn, MaxWordPointsColumn, UpdatedAtColumn, MovesColumn, HintsUsedColumn}
 	)
 
 	return accountStatsTable{
@@ -88,6 +92,8 @@ func newAccountStatsTableImpl(schemaName, tableName, alias string) accountStatsT
 		MaxGamePoints: MaxGamePointsColumn,
 		MaxWordPoints: MaxWordPointsColumn,
 		UpdatedAt:     UpdatedAtColumn,
+		Moves:         MovesColumn,
+		HintsUsed:     HintsUsedColumn,
 
 		AllColumns:     allColumns,
 		MutableColumns: mutableColumns,

backend/internal/postgres/migrations/00001_baseline.sql

@@ -131,7 +131,8 @@ CREATE INDEX games_open_idx ON games (open_deadline_at) WHERE status = 'open';
 -- account, or NULL for the still-empty opponent seat of an auto-match game waiting for an
 -- opponent (status='open'); it is filled when a human or a robot joins. score is the
 -- running/final score, is_winner is stamped on finish (false for every seat on a draw),
--- hints_used counts the per-game allowance consumed before the profile wallet.
+-- hints_used counts the seat's total hints used this game (the free per-game allowance plus
+-- the wallet-charged ones; the first HintsPerPlayer are the allowance).
 CREATE TABLE game_players (
     game_id    uuid     NOT NULL REFERENCES games (game_id) ON DELETE CASCADE,
     seat       smallint NOT NULL,

backend/internal/postgres/migrations/00010_stats_moves_hints.sql

@@ -0,0 +1,16 @@
+-- +goose Up
+-- account_stats gains two lifetime counters for the player's statistics screen: moves — the
+-- player's plays (tile placements; passes and exchanges do not count) — and hints_used — every
+-- hint the player took (the free per-game allowance plus the wallet-charged ones). Both are
+-- summed at game finish over the same games that feed the rest of account_stats (durable
+-- non-guest accounts; honest-AI games are skipped), so the screen can show the "hint share"
+-- = hints_used / moves. See docs/ARCHITECTURE.md §9.
+SET search_path = backend, pg_catalog;
+
+ALTER TABLE account_stats ADD COLUMN moves      integer NOT NULL DEFAULT 0;
+ALTER TABLE account_stats ADD COLUMN hints_used integer NOT NULL DEFAULT 0;
+
+-- +goose Down
+SET search_path = backend, pg_catalog;
+ALTER TABLE account_stats DROP COLUMN hints_used;
+ALTER TABLE account_stats DROP COLUMN moves;

backend/internal/server/handlers_account.go

@@ -38,6 +38,8 @@ type statsDTO struct {
 	Draws         int           `json:"draws"`
 	MaxGamePoints int           `json:"max_game_points"`
 	MaxWordPoints int           `json:"max_word_points"`
+	Moves         int           `json:"moves"`
+	HintsUsed     int           `json:"hints_used"`
 	BestMoves     []bestMoveDTO `json:"best_moves,omitempty"`
 }
 
@@ -165,6 +167,8 @@ func (s *Server) handleStats(c *gin.Context) {
 		Draws:         st.Draws,
 		MaxGamePoints: st.MaxGamePoints,
 		MaxWordPoints: st.MaxWordPoints,
+		Moves:         st.Moves,
+		HintsUsed:     st.HintsUsed,
 		BestMoves:     best,
 	})
 }

docs/ARCHITECTURE.md

@@ -603,7 +603,10 @@ disguised robot stays indistinguishable from a person.
   non-guest accounts only — the finish-time recompute skips any `is_guest`
   seat): wins, losses, **draws**, max points in a game, and
   max points for a single **move** (which already folds in every word the move
-  formed plus the all-tiles bonus). A tie increments draws only; a resignation or
+  formed plus the all-tiles bonus); plus two summed counters — `moves` (the player's
+  plays, i.e. tile placements; passes and exchanges do not count) and `hints_used`
+  (every hint taken, allowance + wallet) — from which the screen derives the **hint
+  share** = hints_used / moves. A tie increments draws only; a resignation or
   timeout is a loss for the acting player. A companion table **`account_best_move`**
   (keyed by account **and variant**) keeps the highest-scoring single play **per
   variant** with the word itself: its main word as an ordered JSON array of tiles

docs/FUNCTIONAL.md

@@ -229,7 +229,9 @@ honest-AI practice game (a live game's export would leak the move journal; an AI
 game is throwaway). The client shares the `.gcg` file where the platform supports
 it, otherwise downloads it. Statistics (durable accounts only):
 wins, losses, draws, max points in a game, and max points for a single move (the
-best play, which already includes every word it formed plus the all-tiles bonus).
+best play, which already includes every word it formed plus the all-tiles bonus). It
+also shows the player's **move count** (their plays — passes and exchanges do not
+count) and their **hint share** (the percentage of those plays where a hint was taken).
 The best move is also broken down **per game variant**, showing the **word itself**
 drawn as game tiles (a wildcard shows its letter but no value) — one row per variant
 the player has played, omitting variants with no plays.

docs/FUNCTIONAL_ru.md

@@ -233,7 +233,9 @@ UTC), суточного окна отсутствия (away; сетка по 10
 с ИИ одноразовая). Клиент делится файлом `.gcg` там, где платформа это поддерживает,
 иначе скачивает его. Статистика (только у постоянных аккаунтов):
 победы, поражения, ничьи, макс. очков за партию и макс. очков за один ход (лучший
-ход, уже включающий все образованные им слова и бонус за все фишки).
+ход, уже включающий все образованные им слова и бонус за все фишки). Также
+показываются **число ходов** игрока (его выкладки — пасы и обмены не считаются) и
+**доля подсказок** (процент таких ходов, на которых бралась подсказка).
 Лучший ход также даётся **с разбивкой по вариантам игры** — **само слово**,
 нарисованное игровыми фишками (wildcard показывает свою букву без очков), по одной
 строке на каждый сыгранный вариант; варианты без ходов не выводятся.

docs/UI_DESIGN.md

@@ -280,8 +280,10 @@ enabled on the first, uncached load) and flip in place when an event refreshes t
   everywhere (score card, lobby row, turn line), the add-friend 🤝 is never drawn, and the chat's
   send field and 🛎️ nudge stay **disabled** while the 🔎 dictionary word-check keeps working.
 - **Statistics** (`screens/Stats.svelte`, the lobby ✏️ tab): a 2-column grid of stat
-  cards (wins / losses / draws / games / win-rate / best game) — pure numbers, no
-  charts — followed by a **full-width "best move" card** that breaks the best move
+  cards (games / wins / draws / losses / moves / hint-share / best game / win-rate) —
+  pure numbers, no charts; hint-share is a one-decimal percentage in the active locale's
+  notation (e.g. "4.8%" / "4,8%") — followed by a **full-width "best move" card** that
+  breaks the best move
   down per variant: one row per played variant (catalogue order, empty variants
   omitted) with the variant name on the left, the **word drawn as game tiles**
   (`components/WordTiles.svelte`, the board's placed-tile look at a small fixed size;

gateway/internal/backendclient/api_social.go

@@ -56,6 +56,8 @@ type StatsResp struct {
 	Draws         int            `json:"draws"`
 	MaxGamePoints int            `json:"max_game_points"`
 	MaxWordPoints int            `json:"max_word_points"`
+	Moves         int            `json:"moves"`
+	HintsUsed     int            `json:"hints_used"`
 	BestMoves     []BestMoveResp `json:"best_moves"`
 }
 

gateway/internal/transcode/encode_social.go

@@ -143,6 +143,8 @@ func encodeStats(r backendclient.StatsResp) []byte {
 	fb.StatsViewAddDraws(b, int32(r.Draws))
 	fb.StatsViewAddMaxGamePoints(b, int32(r.MaxGamePoints))
 	fb.StatsViewAddMaxWordPoints(b, int32(r.MaxWordPoints))
+	fb.StatsViewAddMoves(b, int32(r.Moves))
+	fb.StatsViewAddHintsUsed(b, int32(r.HintsUsed))
 	if len(r.BestMoves) > 0 {
 		fb.StatsViewAddBestMoves(b, bestMoves)
 	}

gateway/internal/transcode/transcode_social_test.go

@@ -195,6 +195,7 @@ func TestStatsRoundTrip(t *testing.T) {
 			t.Errorf("unexpected path %q", r.URL.Path)
 		}
 		_, _ = w.Write([]byte(`{"wins":5,"losses":3,"draws":1,"max_game_points":420,"max_word_points":90,` +
+			`"moves":248,"hints_used":12,` +
 			`"best_moves":[{"variant":"scrabble_en","score":90,"word":[` +
 			`{"letter":"c","value":3,"blank":false},` +
 			`{"letter":"a","value":0,"blank":true},` +
@@ -212,6 +213,9 @@ func TestStatsRoundTrip(t *testing.T) {
 	if st.Wins() != 5 || st.Losses() != 3 || st.Draws() != 1 || st.MaxGamePoints() != 420 || st.MaxWordPoints() != 90 {
 		t.Fatalf("stats decoded wrong: %+v", st)
 	}
+	if st.Moves() != 248 || st.HintsUsed() != 12 {
+		t.Fatalf("moves/hints decoded wrong: moves=%d hints=%d", st.Moves(), st.HintsUsed())
+	}
 	if st.BestMovesLength() != 1 {
 		t.Fatalf("best moves length = %d, want 1", st.BestMovesLength())
 	}

pkg/fbs/scrabble.fbs

@@ -497,6 +497,10 @@ table StatsView {
   max_game_points:int;
   max_word_points:int;
   best_moves:[BestMoveView];
+  // moves is the player's lifetime play count (tile placements); hints_used is their lifetime
+  // hint count. The screen shows the hint share = hints_used / moves (added trailing).
+  moves:int;
+  hints_used:int;
 }
 
 // TargetRequest names a single counterpart account (friend request/cancel/unfriend,

pkg/fbs/scrabblefb/StatsView.go

@@ -121,8 +121,32 @@ func (rcv *StatsView) BestMovesLength() int {
 	return 0
 }
 
+func (rcv *StatsView) Moves() int32 {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(16))
+	if o != 0 {
+		return rcv._tab.GetInt32(o + rcv._tab.Pos)
+	}
+	return 0
+}
+
+func (rcv *StatsView) MutateMoves(n int32) bool {
+	return rcv._tab.MutateInt32Slot(16, n)
+}
+
+func (rcv *StatsView) HintsUsed() int32 {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(18))
+	if o != 0 {
+		return rcv._tab.GetInt32(o + rcv._tab.Pos)
+	}
+	return 0
+}
+
+func (rcv *StatsView) MutateHintsUsed(n int32) bool {
+	return rcv._tab.MutateInt32Slot(18, n)
+}
+
 func StatsViewStart(builder *flatbuffers.Builder) {
-	builder.StartObject(6)
+	builder.StartObject(8)
 }
 func StatsViewAddWins(builder *flatbuffers.Builder, wins int32) {
 	builder.PrependInt32Slot(0, wins, 0)
@@ -145,6 +169,12 @@ func StatsViewAddBestMoves(builder *flatbuffers.Builder, bestMoves flatbuffers.U
 func StatsViewStartBestMovesVector(builder *flatbuffers.Builder, numElems int) flatbuffers.UOffsetT {
 	return builder.StartVector(4, numElems, 4)
 }
+func StatsViewAddMoves(builder *flatbuffers.Builder, moves int32) {
+	builder.PrependInt32Slot(6, moves, 0)
+}
+func StatsViewAddHintsUsed(builder *flatbuffers.Builder, hintsUsed int32) {
+	builder.PrependInt32Slot(7, hintsUsed, 0)
+}
 func StatsViewEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
 	return builder.EndObject()
 }

ui/e2e/social.spec.ts

@@ -58,6 +58,10 @@ test('stats screen shows the metrics and the per-variant best move', async ({ pa
   await page.getByRole('button', { name: /Stats/ }).click();
   await expect(page.getByText('Win rate')).toBeVisible();
   await expect(page.getByText('Best move')).toBeVisible();
+  // The Moves count and the derived Hint share (12 hints / 248 plays = 4.8%, one decimal).
+  await expect(page.getByText('Moves', { exact: true })).toBeVisible();
+  await expect(page.getByText('Hint share')).toBeVisible();
+  await expect(page.getByText('4.8%')).toBeVisible();
   // The best move breaks down per played variant, each row labelled by the variant and
   // ending in the play's score (the word itself renders as game tiles).
   await expect(page.getByText('Scrabble', { exact: true })).toBeVisible();

ui/src/gen/fbs/scrabblefb/stats-view.ts

@@ -58,8 +58,18 @@ bestMovesLength():number {
   return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
 }
 
+moves():number {
+  const offset = this.bb!.__offset(this.bb_pos, 16);
+  return offset ? this.bb!.readInt32(this.bb_pos + offset) : 0;
+}
+
+hintsUsed():number {
+  const offset = this.bb!.__offset(this.bb_pos, 18);
+  return offset ? this.bb!.readInt32(this.bb_pos + offset) : 0;
+}
+
 static startStatsView(builder:flatbuffers.Builder) {
-  builder.startObject(6);
+  builder.startObject(8);
 }
 
 static addWins(builder:flatbuffers.Builder, wins:number) {
@@ -98,12 +108,20 @@ static startBestMovesVector(builder:flatbuffers.Builder, numElems:number) {
   builder.startVector(4, numElems, 4);
 }
 
+static addMoves(builder:flatbuffers.Builder, moves:number) {
+  builder.addFieldInt32(6, moves, 0);
+}
+
+static addHintsUsed(builder:flatbuffers.Builder, hintsUsed:number) {
+  builder.addFieldInt32(7, hintsUsed, 0);
+}
+
 static endStatsView(builder:flatbuffers.Builder):flatbuffers.Offset {
   const offset = builder.endObject();
   return offset;
 }
 
-static createStatsView(builder:flatbuffers.Builder, wins:number, losses:number, draws:number, maxGamePoints:number, maxWordPoints:number, bestMovesOffset:flatbuffers.Offset):flatbuffers.Offset {
+static createStatsView(builder:flatbuffers.Builder, wins:number, losses:number, draws:number, maxGamePoints:number, maxWordPoints:number, bestMovesOffset:flatbuffers.Offset, moves:number, hintsUsed:number):flatbuffers.Offset {
   StatsView.startStatsView(builder);
   StatsView.addWins(builder, wins);
   StatsView.addLosses(builder, losses);
@@ -111,6 +129,8 @@ static createStatsView(builder:flatbuffers.Builder, wins:number, losses:number,
   StatsView.addMaxGamePoints(builder, maxGamePoints);
   StatsView.addMaxWordPoints(builder, maxWordPoints);
   StatsView.addBestMoves(builder, bestMovesOffset);
+  StatsView.addMoves(builder, moves);
+  StatsView.addHintsUsed(builder, hintsUsed);
   return StatsView.endStatsView(builder);
 }
 }

ui/src/lib/codec.test.ts

@@ -284,6 +284,8 @@ describe('codec', () => {
     fb.StatsView.addDraws(b, 1);
     fb.StatsView.addMaxGamePoints(b, 420);
     fb.StatsView.addMaxWordPoints(b, 90);
+    fb.StatsView.addMoves(b, 248);
+    fb.StatsView.addHintsUsed(b, 12);
     b.finish(fb.StatsView.endStatsView(b));
     expect(decodeStats(b.asUint8Array())).toEqual({
       wins: 7,
@@ -291,6 +293,8 @@ describe('codec', () => {
       draws: 1,
       maxGamePoints: 420,
       maxWordPoints: 90,
+      moves: 248,
+      hintsUsed: 12,
       bestMoves: [],
     });
   });
@@ -328,6 +332,8 @@ describe('codec', () => {
       draws: 0,
       maxGamePoints: 0,
       maxWordPoints: 0,
+      moves: 0,
+      hintsUsed: 0,
       bestMoves: [
         {
           variant: 'scrabble_en',

ui/src/lib/codec.ts

@@ -762,6 +762,8 @@ export function decodeStats(buf: Uint8Array): Stats {
     draws: v.draws(),
     maxGamePoints: v.maxGamePoints(),
     maxWordPoints: v.maxWordPoints(),
+    moves: v.moves(),
+    hintsUsed: v.hintsUsed(),
     bestMoves,
   };
 }

ui/src/lib/i18n/en.ts

@@ -274,6 +274,8 @@ export const en = {
   'stats.losses': 'Losses',
   'stats.draws': 'Draws',
   'stats.played': 'Games',
+  'stats.moves': 'Moves',
+  'stats.hintShare': 'Hint share',
   'stats.winRate': 'Win rate',
   'stats.maxGame': 'Best game',
   'stats.maxWord': 'Best move',

ui/src/lib/i18n/ru.ts

@@ -275,6 +275,8 @@ export const ru: Record<MessageKey, string> = {
   'stats.losses': 'Поражения',
   'stats.draws': 'Ничьи',
   'stats.played': 'Игр',
+  'stats.moves': 'Ходы',
+  'stats.hintShare': 'Доля подсказок',
   'stats.winRate': 'Доля побед',
   'stats.maxGame': 'Лучшая игра',
   'stats.maxWord': 'Лучший ход',

ui/src/lib/mock/data.ts

@@ -56,6 +56,8 @@ export const MOCK_STATS: Stats = {
   draws: 1,
   maxGamePoints: 421,
   maxWordPoints: 134,
+  moves: 248, // plays across all games
+  hintsUsed: 12, // -> hint share 12/248 = 4.8%
   // Letters are lower-cased as the backend emits them; the tile renderer upper-cases for
   // display. The 'd' in "wonderful" is a blank (value 0) to exercise wildcard rendering.
   // Erudit is absent on purpose, so the screen demonstrates skipping a not-yet-played variant.

ui/src/lib/model.ts

@@ -237,6 +237,10 @@ export interface Stats {
   draws: number;
   maxGamePoints: number;
   maxWordPoints: number;
+  /** Lifetime count of the player's plays (tile placements). */
+  moves: number;
+  /** Lifetime count of hints the player took (allowance + wallet). */
+  hintsUsed: number;
   bestMoves: BestMove[];
 }
 

ui/src/lib/stats.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest';
-import { gamesPlayed, winRate } from './stats';
+import { gamesPlayed, hintSharePercent, winRate } from './stats';
 import type { Stats } from './model';
 
 const s = (wins: number, losses: number, draws: number): Stats => ({
@@ -8,9 +8,14 @@ const s = (wins: number, losses: number, draws: number): Stats => ({
   draws,
   maxGamePoints: 0,
   maxWordPoints: 0,
+  moves: 0,
+  hintsUsed: 0,
   bestMoves: [],
 });
 
+// withCounts overrides moves/hintsUsed on the zero fixture for the hint-share cases.
+const withCounts = (moves: number, hintsUsed: number): Stats => ({ ...s(0, 0, 0), moves, hintsUsed });
+
 describe('stats', () => {
   it('sums games played', () => {
     expect(gamesPlayed(s(7, 4, 1))).toBe(12);
@@ -24,4 +29,14 @@ describe('stats', () => {
   it('win rate is 0 with no games', () => {
     expect(winRate(s(0, 0, 0))).toBe(0);
   });
+
+  it('computes the hint share (hints / plays)', () => {
+    expect(hintSharePercent(withCounts(200, 10))).toBe(5); // 10/200 = 5%
+    expect(hintSharePercent(withCounts(248, 12))).toBeCloseTo(4.8387, 3);
+  });
+
+  it('hint share is 0 with no plays (no division by zero)', () => {
+    expect(hintSharePercent(withCounts(0, 0))).toBe(0);
+    expect(hintSharePercent(withCounts(0, 5))).toBe(0);
+  });
 });

ui/src/lib/stats.ts

@@ -12,3 +12,10 @@ export function winRate(s: Stats): number {
   const n = gamesPlayed(s);
   return n > 0 ? Math.round((s.wins / n) * 100) : 0;
 }
+
+/** hintSharePercent is the share of the player's plays that drew on a hint
+ *  (hints used / plays × 100), unrounded; 0 when no plays. The screen formats it to one
+ *  decimal in the active locale. */
+export function hintSharePercent(s: Stats): number {
+  return s.moves > 0 ? (s.hintsUsed / s.moves) * 100 : 0;
+}

ui/src/screens/Stats.svelte

@@ -4,11 +4,20 @@
   import WordTiles from '../components/WordTiles.svelte';
   import { app, handleError } from '../lib/app.svelte';
   import { gateway } from '../lib/gateway';
-  import { t, type MessageKey } from '../lib/i18n/index.svelte';
-  import { gamesPlayed, winRate } from '../lib/stats';
+  import { t, i18n, type MessageKey } from '../lib/i18n/index.svelte';
+  import { gamesPlayed, hintSharePercent, winRate } from '../lib/stats';
   import { ALL_VARIANTS, variantNameKey } from '../lib/variants';
   import type { BestMove, Stats } from '../lib/model';
 
+  // hintShare is shown to one decimal in the active locale's notation ("4.8%" / "4,8%").
+  function hintShare(s: Stats): string {
+    const pct = hintSharePercent(s).toLocaleString(i18n.locale, {
+      minimumFractionDigits: 1,
+      maximumFractionDigits: 1,
+    });
+    return `${pct}%`;
+  }
+
   let stats = $state<Stats | null>(null);
 
   onMount(async () => {
@@ -23,12 +32,14 @@
   const cards = $derived<{ key: MessageKey; value: string | number }[]>(
     stats
       ? [
-          { key: 'stats.wins', value: stats.wins },
-          { key: 'stats.losses', value: stats.losses },
-          { key: 'stats.draws', value: stats.draws },
           { key: 'stats.played', value: gamesPlayed(stats) },
-          { key: 'stats.winRate', value: `${winRate(stats)}%` },
+          { key: 'stats.wins', value: stats.wins },
+          { key: 'stats.draws', value: stats.draws },
+          { key: 'stats.losses', value: stats.losses },
+          { key: 'stats.moves', value: stats.moves },
+          { key: 'stats.hintShare', value: hintShare(stats) },
           { key: 'stats.maxGame', value: stats.maxGamePoints },
+          { key: 'stats.winRate', value: `${winRate(stats)}%` },
         ]
       : [],
   );