From d1ba6664957eb1ad8e87bf3430450bfe27c48e60 Mon Sep 17 00:00:00 2001
From: Ilia Denisov <evilcart@gmail.com>
Date: Sun, 14 Jun 2026 21:55:59 +0200
Subject: [PATCH 1/2] feat(admin): manual account blocking (suspensions)

Operator-driven hard block, the counterpart to the soft high-rate flag: permanent or until a date, with an optional reason chosen from an editable en+ru picklist (snapshotted onto the block). A block forfeits the player's active games (opponent wins, as a resignation) and cancels their open matchmaking games. A backend gate refuses a blocked account on every /api/v1/user/* route except the block-status probe with 403 account_blocked, which threads through the gateway as the Execute result_code; the UI surfaces it as a terminal blocked screen and stops all push/poll. Temporary blocks self-expire; the operator can unblock at any time (lost games stay lost). Sessions are not revoked, so the blocked client can still reach the exempt block-status endpoint.

Backend: migration 00003 (account_suspensions + suspension_reasons) + jet regen; account suspension store; game.ForfeitAllForAccount; requireNotSuspended gate + block-status endpoint; admin console block/unblock + Reasons CRUD. Wire: fbs BlockStatus + account.block_status gateway op. UI: blocked screen, app state, transport/codec, i18n. Docs: ARCHITECTURE, FUNCTIONAL(+ru), PRERELEASE (AB).
---
 PRERELEASE.md                                 |   1 +
 backend/internal/account/suspension.go        | 268 ++++++++++++++++++
 .../adminconsole/templates/layout.gohtml      |   1 +
 .../templates/pages/reasons.gohtml            |  27 ++
 .../templates/pages/user_detail.gohtml        |  29 ++
 backend/internal/adminconsole/views.go        |  36 +++
 backend/internal/game/service.go              |  62 ++++
 backend/internal/game/store.go                |  20 ++
 backend/internal/inttest/forfeit_test.go      | 123 ++++++++
 .../inttest/suspension_console_test.go        | 121 ++++++++
 .../internal/inttest/suspension_gate_test.go  | 151 ++++++++++
 backend/internal/inttest/suspension_test.go   | 209 ++++++++++++++
 .../jet/backend/model/account_suspensions.go  |  24 ++
 .../jet/backend/model/suspension_reasons.go   |  21 ++
 .../jet/backend/table/account_suspensions.go  |  99 +++++++
 .../jet/backend/table/suspension_reasons.go   |  90 ++++++
 .../jet/backend/table/table_use_schema.go     |   2 +
 .../migrations/00003_account_suspensions.sql  |  45 +++
 backend/internal/server/handlers.go           |   3 +
 backend/internal/server/handlers_account.go   |  42 +++
 .../internal/server/handlers_admin_console.go | 171 +++++++++++
 backend/internal/server/middleware.go         |  37 +++
 backend/internal/server/server.go             |   3 +
 docs/ARCHITECTURE.md                          |  20 ++
 docs/FUNCTIONAL.md                            |  12 +
 docs/FUNCTIONAL_ru.md                         |  13 +
 gateway/internal/backendclient/api.go         |  19 ++
 gateway/internal/transcode/encode.go          |  14 +
 gateway/internal/transcode/transcode.go       |  12 +
 .../transcode/transcode_block_test.go         |  64 +++++
 pkg/fbs/scrabble.fbs                          |  12 +
 pkg/fbs/scrabblefb/BlockStatus.go             | 101 +++++++
 ui/e2e/blocked.spec.ts                        |  42 +++
 ui/src/App.svelte                             |   3 +
 ui/src/gen/fbs/scrabblefb.ts                  |   1 +
 ui/src/gen/fbs/scrabblefb/block-status.ts     |  80 ++++++
 ui/src/lib/app.svelte.ts                      |  45 ++-
 ui/src/lib/blocked.test.ts                    |  27 ++
 ui/src/lib/blocked.ts                         |  27 ++
 ui/src/lib/client.ts                          |   4 +
 ui/src/lib/codec.test.ts                      |  33 +++
 ui/src/lib/codec.ts                           |  11 +
 ui/src/lib/i18n/en.ts                         |   5 +
 ui/src/lib/i18n/ru.ts                         |   5 +
 ui/src/lib/mock/client.ts                     |   5 +
 ui/src/lib/model.ts                           |  12 +
 ui/src/lib/transport.ts                       |   3 +
 ui/src/screens/Blocked.svelte                 |  53 ++++
 48 files changed, 2206 insertions(+), 2 deletions(-)
 create mode 100644 backend/internal/account/suspension.go
 create mode 100644 backend/internal/adminconsole/templates/pages/reasons.gohtml
 create mode 100644 backend/internal/inttest/forfeit_test.go
 create mode 100644 backend/internal/inttest/suspension_console_test.go
 create mode 100644 backend/internal/inttest/suspension_gate_test.go
 create mode 100644 backend/internal/inttest/suspension_test.go
 create mode 100644 backend/internal/postgres/jet/backend/model/account_suspensions.go
 create mode 100644 backend/internal/postgres/jet/backend/model/suspension_reasons.go
 create mode 100644 backend/internal/postgres/jet/backend/table/account_suspensions.go
 create mode 100644 backend/internal/postgres/jet/backend/table/suspension_reasons.go
 create mode 100644 backend/internal/postgres/migrations/00003_account_suspensions.sql
 create mode 100644 gateway/internal/transcode/transcode_block_test.go
 create mode 100644 pkg/fbs/scrabblefb/BlockStatus.go
 create mode 100644 ui/e2e/blocked.spec.ts
 create mode 100644 ui/src/gen/fbs/scrabblefb/block-status.ts
 create mode 100644 ui/src/lib/blocked.test.ts
 create mode 100644 ui/src/lib/blocked.ts
 create mode 100644 ui/src/screens/Blocked.svelte

diff --git a/PRERELEASE.md b/PRERELEASE.md
index 08ac29f..78b1345 100644
--- a/PRERELEASE.md
+++ b/PRERELEASE.md
@@ -30,6 +30,7 @@ the edge before prod. Each phase maps back to the owner's raw pre-release TODO l
 | MW3 | Graceful replay degradation: a game whose journalled move became illegal under MW2 is closed as a draw (`end_reason='aborted'`) on open instead of erroring, with an impersonal organizer note in the history + GCG (migration `00002`) | owner ad-hoc | **done** |
 | OW | Open auto-match: enter the game at once and wait inside it (robot after 90–180 s) | owner ad-hoc | **done** |
 | DA | Dictionary admin: online release-archive upload → word-diff preview → install/activate; versioned dict volume; active version persisted in DB; resident label = release tag | owner ad-hoc | **done** |
+| AB | Manual account block (admin suspension): permanent/temporary with an editable en+ru reason picklist; a block forfeits the player's active games + cancels their open ones; a backend gate refuses a blocked account with **403 `account_blocked`**; the UI shows a terminal blocked screen and stops all push/poll; manual unblock; temporary blocks self-expire (migration `00003`) | owner ad-hoc | **done** |
 | → | Stage 18 — prod contour deploy | — | see [`PLAN.md`](PLAN.md) |
 
 ## Key findings (these reshaped the raw list — read before starting a phase)
diff --git a/backend/internal/account/suspension.go b/backend/internal/account/suspension.go
new file mode 100644
index 0000000..e1e2039
--- /dev/null
+++ b/backend/internal/account/suspension.go
@@ -0,0 +1,268 @@
+package account
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/go-jet/jet/v2/postgres"
+	"github.com/go-jet/jet/v2/qrm"
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/postgres/jet/backend/model"
+	"scrabble/backend/internal/postgres/jet/backend/table"
+)
+
+// Suspension is an account's currently-in-force manual block, the operator's hard counterpart
+// to the soft, reversible FlaggedHighRateAt marker. It is named "suspension" to stay distinct
+// from the peer-to-peer blocks in internal/social (one player muting another); the vocabulary
+// the player sees is "blocked". BlockedUntil is nil for a permanent block and the expiry
+// instant for a temporary one. ReasonEn and ReasonRu are the reason-text snapshot taken at
+// block time (both empty when no reason was cited), so editing or deleting the picklist entry
+// never changes what an already-blocked player is shown.
+type Suspension struct {
+	AccountID    uuid.UUID
+	BlockedAt    time.Time
+	BlockedUntil *time.Time
+	ReasonEn     string
+	ReasonRu     string
+}
+
+// Permanent reports whether the suspension has no expiry.
+func (s Suspension) Permanent() bool { return s.BlockedUntil == nil }
+
+// LocalizedReason returns the reason text in the given language ("ru" selects Russian, anything
+// else English), or empty when no reason was cited. The two snapshots are always both set or
+// both empty, since a reason is chosen from the en+ru picklist.
+func (s Suspension) LocalizedReason(language string) string {
+	if language == "ru" {
+		return s.ReasonRu
+	}
+	return s.ReasonEn
+}
+
+// Reason is one entry of the operator-editable suspension-reason picklist, carrying the English
+// and Russian text shown to a blocked player in their language.
+type Reason struct {
+	ID        uuid.UUID
+	TextEn    string
+	TextRu    string
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}
+
+// Suspend records a new manual block on the account: permanent when until is nil, otherwise in
+// force until that instant. reasonEn and reasonRu are the optional reason-text snapshot (both
+// empty for no reason) and reasonID is the loose picklist link (nil when none, nulled later if
+// that entry is deleted). It returns the persisted Suspension. Suspending an already-blocked
+// account simply appends another block; CurrentSuspension always reflects the strongest.
+func (s *Store) Suspend(ctx context.Context, accountID uuid.UUID, until *time.Time, reasonEn, reasonRu string, reasonID *uuid.UUID) (Suspension, error) {
+	suspensionID, err := uuid.NewV7()
+	if err != nil {
+		return Suspension{}, fmt.Errorf("account: new suspension id: %w", err)
+	}
+	stmt := table.AccountSuspensions.INSERT(
+		table.AccountSuspensions.SuspensionID,
+		table.AccountSuspensions.AccountID,
+		table.AccountSuspensions.BlockedUntil,
+		table.AccountSuspensions.ReasonEn,
+		table.AccountSuspensions.ReasonRu,
+		table.AccountSuspensions.ReasonID,
+	).VALUES(
+		suspensionID,
+		accountID,
+		nullableTimestamp(until),
+		nullableString(reasonEn),
+		nullableString(reasonRu),
+		nullableUUID(reasonID),
+	).RETURNING(table.AccountSuspensions.AllColumns)
+
+	var row model.AccountSuspensions
+	if err := stmt.QueryContext(ctx, s.db, &row); err != nil {
+		return Suspension{}, fmt.Errorf("account: suspend %s: %w", accountID, err)
+	}
+	return modelToSuspension(row), nil
+}
+
+// LiftSuspension lifts every in-force block on the account (the operator's manual unblock),
+// stamping lifted_at on each. It is a no-op when the account is not currently blocked. Lifting
+// does not un-resign games already forfeited at block time — those stay lost.
+func (s *Store) LiftSuspension(ctx context.Context, accountID uuid.UUID) error {
+	now := time.Now().UTC()
+	stmt := table.AccountSuspensions.
+		UPDATE(table.AccountSuspensions.LiftedAt).
+		SET(postgres.TimestampzT(now)).
+		WHERE(
+			table.AccountSuspensions.AccountID.EQ(postgres.UUID(accountID)).
+				AND(activeSuspensionPredicate(now)),
+		)
+	if _, err := stmt.ExecContext(ctx, s.db); err != nil {
+		return fmt.Errorf("account: lift suspension %s: %w", accountID, err)
+	}
+	return nil
+}
+
+// CurrentSuspension returns the account's in-force block and true, or false when the account is
+// not blocked. When several blocks overlap it returns the strongest — a permanent one first,
+// otherwise the latest-expiring — which is what the player's blocked screen shows. The gate
+// middleware calls it on every authenticated request, served by account_suspensions_account_idx.
+func (s *Store) CurrentSuspension(ctx context.Context, accountID uuid.UUID) (Suspension, bool, error) {
+	// A store with no database (the zero-value store used by the routing unit tests) has no
+	// suspensions; report not-blocked rather than dereferencing a nil pool. A real pool that
+	// errors still surfaces the error to the gate, which fails closed.
+	if s.db == nil {
+		return Suspension{}, false, nil
+	}
+	now := time.Now().UTC()
+	stmt := postgres.SELECT(table.AccountSuspensions.AllColumns).
+		FROM(table.AccountSuspensions).
+		WHERE(
+			table.AccountSuspensions.AccountID.EQ(postgres.UUID(accountID)).
+				AND(activeSuspensionPredicate(now)),
+		).
+		ORDER_BY(table.AccountSuspensions.BlockedUntil.DESC().NULLS_FIRST()).
+		LIMIT(1)
+
+	var row model.AccountSuspensions
+	if err := stmt.QueryContext(ctx, s.db, &row); err != nil {
+		if errors.Is(err, qrm.ErrNoRows) {
+			return Suspension{}, false, nil
+		}
+		return Suspension{}, false, fmt.Errorf("account: current suspension %s: %w", accountID, err)
+	}
+	return modelToSuspension(row), true, nil
+}
+
+// activeSuspensionPredicate matches the rows of a block that is in force at now: not lifted and
+// either permanent or not yet expired.
+func activeSuspensionPredicate(now time.Time) postgres.BoolExpression {
+	return table.AccountSuspensions.LiftedAt.IS_NULL().
+		AND(
+			table.AccountSuspensions.BlockedUntil.IS_NULL().
+				OR(table.AccountSuspensions.BlockedUntil.GT(postgres.TimestampzT(now))),
+		)
+}
+
+// ListReasons returns the suspension-reason picklist, oldest first.
+func (s *Store) ListReasons(ctx context.Context) ([]Reason, error) {
+	stmt := postgres.SELECT(table.SuspensionReasons.AllColumns).
+		FROM(table.SuspensionReasons).
+		ORDER_BY(table.SuspensionReasons.CreatedAt.ASC())
+	var rows []model.SuspensionReasons
+	if err := stmt.QueryContext(ctx, s.db, &rows); err != nil {
+		return nil, fmt.Errorf("account: list reasons: %w", err)
+	}
+	out := make([]Reason, 0, len(rows))
+	for _, r := range rows {
+		out = append(out, modelToReason(r))
+	}
+	return out, nil
+}
+
+// GetReason loads one picklist entry, or ErrNotFound when it is absent.
+func (s *Store) GetReason(ctx context.Context, id uuid.UUID) (Reason, error) {
+	stmt := postgres.SELECT(table.SuspensionReasons.AllColumns).
+		FROM(table.SuspensionReasons).
+		WHERE(table.SuspensionReasons.ReasonID.EQ(postgres.UUID(id))).
+		LIMIT(1)
+	var row model.SuspensionReasons
+	if err := stmt.QueryContext(ctx, s.db, &row); err != nil {
+		if errors.Is(err, qrm.ErrNoRows) {
+			return Reason{}, ErrNotFound
+		}
+		return Reason{}, fmt.Errorf("account: get reason %s: %w", id, err)
+	}
+	return modelToReason(row), nil
+}
+
+// CreateReason inserts a new picklist entry with the given English and Russian text.
+func (s *Store) CreateReason(ctx context.Context, textEn, textRu string) (Reason, error) {
+	id, err := uuid.NewV7()
+	if err != nil {
+		return Reason{}, fmt.Errorf("account: new reason id: %w", err)
+	}
+	stmt := table.SuspensionReasons.INSERT(
+		table.SuspensionReasons.ReasonID,
+		table.SuspensionReasons.TextEn,
+		table.SuspensionReasons.TextRu,
+	).VALUES(id, textEn, textRu).
+		RETURNING(table.SuspensionReasons.AllColumns)
+	var row model.SuspensionReasons
+	if err := stmt.QueryContext(ctx, s.db, &row); err != nil {
+		return Reason{}, fmt.Errorf("account: create reason: %w", err)
+	}
+	return modelToReason(row), nil
+}
+
+// UpdateReason rewrites a picklist entry's English and Russian text, returning ErrNotFound when
+// it is absent. Existing suspensions keep their text snapshot, so the change only affects future
+// blocks.
+func (s *Store) UpdateReason(ctx context.Context, id uuid.UUID, textEn, textRu string) (Reason, error) {
+	stmt := table.SuspensionReasons.
+		UPDATE(table.SuspensionReasons.TextEn, table.SuspensionReasons.TextRu, table.SuspensionReasons.UpdatedAt).
+		SET(postgres.String(textEn), postgres.String(textRu), postgres.TimestampzT(time.Now().UTC())).
+		WHERE(table.SuspensionReasons.ReasonID.EQ(postgres.UUID(id))).
+		RETURNING(table.SuspensionReasons.AllColumns)
+	var row model.SuspensionReasons
+	if err := stmt.QueryContext(ctx, s.db, &row); err != nil {
+		if errors.Is(err, qrm.ErrNoRows) {
+			return Reason{}, ErrNotFound
+		}
+		return Reason{}, fmt.Errorf("account: update reason %s: %w", id, err)
+	}
+	return modelToReason(row), nil
+}
+
+// DeleteReason removes a picklist entry. It is a hard delete: the reason_id link on past
+// suspensions is nulled by the foreign key, but their text snapshot is untouched.
+func (s *Store) DeleteReason(ctx context.Context, id uuid.UUID) error {
+	stmt := table.SuspensionReasons.
+		DELETE().
+		WHERE(table.SuspensionReasons.ReasonID.EQ(postgres.UUID(id)))
+	if _, err := stmt.ExecContext(ctx, s.db); err != nil {
+		return fmt.Errorf("account: delete reason %s: %w", id, err)
+	}
+	return nil
+}
+
+// modelToSuspension projects a generated row into the public Suspension struct.
+func modelToSuspension(row model.AccountSuspensions) Suspension {
+	s := Suspension{AccountID: row.AccountID, BlockedAt: row.BlockedAt, BlockedUntil: row.BlockedUntil}
+	if row.ReasonEn != nil {
+		s.ReasonEn = *row.ReasonEn
+	}
+	if row.ReasonRu != nil {
+		s.ReasonRu = *row.ReasonRu
+	}
+	return s
+}
+
+// modelToReason projects a generated row into the public Reason struct.
+func modelToReason(row model.SuspensionReasons) Reason {
+	return Reason{ID: row.ReasonID, TextEn: row.TextEn, TextRu: row.TextRu, CreatedAt: row.CreatedAt, UpdatedAt: row.UpdatedAt}
+}
+
+// nullableString renders an empty string as SQL NULL, otherwise the string literal.
+func nullableString(v string) postgres.Expression {
+	if v == "" {
+		return postgres.NULL
+	}
+	return postgres.String(v)
+}
+
+// nullableTimestamp renders a nil time as SQL NULL, otherwise the UTC timestamp literal.
+func nullableTimestamp(v *time.Time) postgres.Expression {
+	if v == nil {
+		return postgres.NULL
+	}
+	return postgres.TimestampzT(v.UTC())
+}
+
+// nullableUUID renders a nil id as SQL NULL, otherwise the uuid literal.
+func nullableUUID(v *uuid.UUID) postgres.Expression {
+	if v == nil {
+		return postgres.NULL
+	}
+	return postgres.UUID(*v)
+}
diff --git a/backend/internal/adminconsole/templates/layout.gohtml b/backend/internal/adminconsole/templates/layout.gohtml
index 14e09d9..770ac90 100644
--- a/backend/internal/adminconsole/templates/layout.gohtml
+++ b/backend/internal/adminconsole/templates/layout.gohtml
@@ -18,6 +18,7 @@
     <a href="/_gm/complaints"{{if eq .ActiveNav "complaints"}} class="active"{{end}}>Complaints</a>
     <a href="/_gm/messages"{{if eq .ActiveNav "messages"}} class="active"{{end}}>Messages</a>
     <a href="/_gm/throttled"{{if eq .ActiveNav "throttled"}} class="active"{{end}}>Throttled</a>
+    <a href="/_gm/reasons"{{if eq .ActiveNav "reasons"}} class="active"{{end}}>Reasons</a>
     <a href="/_gm/dictionary"{{if eq .ActiveNav "dictionary"}} class="active"{{end}}>Dictionary</a>
     <a href="/_gm/broadcast"{{if eq .ActiveNav "broadcast"}} class="active"{{end}}>Broadcast</a>
     <a href="/_gm/grafana/">Grafana ↗</a>
diff --git a/backend/internal/adminconsole/templates/pages/reasons.gohtml b/backend/internal/adminconsole/templates/pages/reasons.gohtml
new file mode 100644
index 0000000..844dabb
--- /dev/null
+++ b/backend/internal/adminconsole/templates/pages/reasons.gohtml
@@ -0,0 +1,27 @@
+{{define "content" -}}
+<h1>Suspension reasons</h1>
+{{with .Data}}
+<p class="note">Reasons offered when blocking a user; each is shown to the blocked player in their own language. Editing or deleting a reason does not change a reason already shown to a currently-blocked player (blocks snapshot the text).</p>
+<section class="panel"><h2>Add reason</h2>
+<form class="form col" method="post" action="/_gm/reasons">
+<label>English <input type="text" name="text_en" required></label>
+<label>Russian <input type="text" name="text_ru" required></label>
+<div><button type="submit">Add</button></div>
+</form>
+</section>
+<section class="panel"><h2>Existing reasons</h2>
+{{range .Items}}
+<div class="row">
+<form class="form" method="post" action="/_gm/reasons/{{.ID}}/update">
+<input type="text" name="text_en" value="{{.TextEn}}" aria-label="English" required>
+<input type="text" name="text_ru" value="{{.TextRu}}" aria-label="Russian" required>
+<button type="submit">Save</button>
+</form>
+<form class="form" method="post" action="/_gm/reasons/{{.ID}}/delete">
+<button type="submit">Delete</button>
+</form>
+</div>
+{{else}}<p class="note">no reasons yet</p>{{end}}
+</section>
+{{end}}
+{{- end}}
diff --git a/backend/internal/adminconsole/templates/pages/user_detail.gohtml b/backend/internal/adminconsole/templates/pages/user_detail.gohtml
index f4396d1..89a324e 100644
--- a/backend/internal/adminconsole/templates/pages/user_detail.gohtml
+++ b/backend/internal/adminconsole/templates/pages/user_detail.gohtml
@@ -34,6 +34,35 @@
 {{else}}<p class="note">no statistics</p>{{end}}
 </section>
 </div>
+<section class="panel"><h2>Account block</h2>
+{{$uid := .ID}}
+{{with .Suspension}}{{if .Blocked}}
+<ul class="kv">
+<li><b>Status</b> <span class="warn">{{if .Permanent}}blocked (permanent){{else}}blocked until {{.Until}} (UTC){{end}}</span></li>
+{{if .BlockedAt}}<li><b>Since</b> {{.BlockedAt}}</li>{{end}}
+{{if .ReasonEn}}<li><b>Reason</b> {{.ReasonEn}} / {{.ReasonRu}}</li>{{end}}
+</ul>
+<form class="form" method="post" action="/_gm/users/{{$uid}}/unblock">
+<button type="submit">Unblock</button>
+</form>
+{{else}}<p class="note">not blocked</p>{{end}}{{end}}
+<form class="form col" method="post" action="/_gm/users/{{.ID}}/block">
+<label>Duration <select name="duration">
+<option value="permanent">permanent</option>
+<option value="1d">1 day</option>
+<option value="3d">3 days</option>
+<option value="1w">1 week</option>
+<option value="1m">1 month</option>
+<option value="custom">custom date (UTC)</option>
+</select></label>
+<label>Custom until (UTC; used when duration is "custom") <input type="datetime-local" name="until"></label>
+<label>Reason <select name="reason">
+<option value="">&mdash; none &mdash;</option>
+{{range .Reasons}}<option value="{{.ID}}">{{.TextEn}}</option>{{end}}
+</select></label>
+<div><button type="submit">{{if .Suspension.Blocked}}Re-block{{else}}Block{{end}}</button></div>
+</form>
+</section>
 {{if .MoveChart}}
 <section class="panel"><h2>Move timing</h2>
 <p class="note">Think time per move number across all games — <span class="lg lg-min">min</span> · <span class="lg lg-avg">mean</span> · <span class="lg lg-max">max</span>.</p>
diff --git a/backend/internal/adminconsole/views.go b/backend/internal/adminconsole/views.go
index e59d46c..036a6d5 100644
--- a/backend/internal/adminconsole/views.go
+++ b/backend/internal/adminconsole/views.go
@@ -135,6 +135,29 @@ type UserDetailView struct {
 	// MoveChart is the pre-rendered inline SVG of the account's per-move-number think
 	// time (min/mean/max), empty when the account has no timed move.
 	MoveChart template.HTML
+	// Suspension is the account's current manual-block state, shown with the block/unblock
+	// form; Reasons is the operator-editable reason picklist offered in the block form.
+	Suspension SuspensionView
+	Reasons    []ReasonOption
+}
+
+// SuspensionView is an account's current manual-block state shown on the user card: whether it
+// is blocked, whether the block is permanent, the pre-formatted expiry (empty when permanent),
+// when it was applied, and the reason snapshot in both languages (empty when none was cited).
+type SuspensionView struct {
+	Blocked   bool
+	Permanent bool
+	Until     string
+	BlockedAt string
+	ReasonEn  string
+	ReasonRu  string
+}
+
+// ReasonOption is one suspension-reason picklist entry offered in the block form's dropdown.
+type ReasonOption struct {
+	ID     string
+	TextEn string
+	TextRu string
 }
 
 // StatsRow is an account's lifetime statistics.
@@ -317,6 +340,19 @@ type FlaggedAccountRow struct {
 	FlaggedAt   string
 }
 
+// ReasonsView is the suspension-reason picklist management page: every editable reason entry.
+type ReasonsView struct {
+	Items []ReasonRow
+}
+
+// ReasonRow is one editable suspension-reason entry, with its English and Russian text.
+type ReasonRow struct {
+	ID        string
+	TextEn    string
+	TextRu    string
+	CreatedAt string
+}
+
 // MessageView is the result page shown after a POST action.
 type MessageView struct {
 	Heading string
diff --git a/backend/internal/game/service.go b/backend/internal/game/service.go
index 026cc5b..e69757e 100644
--- a/backend/internal/game/service.go
+++ b/backend/internal/game/service.go
@@ -378,6 +378,68 @@ func (svc *Service) Resign(ctx context.Context, gameID, accountID uuid.UUID) (Mo
 	return MoveResult{Move: rec, Game: post}, nil
 }
 
+// ForfeitAllForAccount resigns every game the account is currently playing and cancels every game
+// it has opened but no opponent has joined, returning how many it acted on. It is the game-side
+// effect of an admin block: the blocked player instantly loses each live game (the opponent
+// winning, exactly as a manual resignation) and leaves matchmaking so nobody joins a doomed game.
+// It reuses the per-game resignation path (its lock, commit and live events), so it is safe to
+// call while play continues and is idempotent — an already-resigned or finished game is skipped.
+// A per-game failure is logged and skipped so one bad game does not strand the rest; the
+// turn-timeout sweeper remains the backstop for anything missed in a race.
+func (svc *Service) ForfeitAllForAccount(ctx context.Context, accountID uuid.UUID) (int, error) {
+	games, err := svc.store.ListGamesForAccount(ctx, accountID)
+	if err != nil {
+		return 0, err
+	}
+	count := 0
+	for _, g := range games {
+		if g.Status != StatusActive && g.Status != StatusOpen {
+			continue // a finished game holds no turn to forfeit
+		}
+		acted, err := svc.forfeitOne(ctx, g.ID, accountID)
+		if err != nil {
+			svc.log.Warn("forfeit on block", zap.String("game", g.ID.String()), zap.Error(err))
+			continue
+		}
+		if acted {
+			count++
+		}
+	}
+	return count, nil
+}
+
+// forfeitOne resigns one game on behalf of accountID, or cancels it when it is an open auto-match
+// game still awaiting an opponent. It reports whether it changed the game. A game that has already
+// finished, or in which the account no longer holds a seat, is a benign no-op.
+func (svc *Service) forfeitOne(ctx context.Context, gameID, accountID uuid.UUID) (bool, error) {
+	_, err := svc.Resign(ctx, gameID, accountID)
+	switch {
+	case err == nil:
+		return true, nil
+	case errors.Is(err, ErrNoOpponentYet):
+		// An open game with no opponent cannot be resigned (there is no one to award the win), so
+		// delete it to clear it from the matchmaking pool. If it filled in the race window it is
+		// now active, so resign the seat instead.
+		deleted, derr := svc.store.DeleteOpenGame(ctx, gameID)
+		if derr != nil {
+			return false, derr
+		}
+		if deleted {
+			svc.cache.remove(gameID)
+			return true, nil
+		}
+		if _, err := svc.Resign(ctx, gameID, accountID); err != nil &&
+			!errors.Is(err, ErrFinished) && !errors.Is(err, ErrNoOpponentYet) {
+			return false, err
+		}
+		return true, nil
+	case errors.Is(err, ErrFinished), errors.Is(err, ErrNotAPlayer), errors.Is(err, ErrNotFound):
+		return false, nil
+	default:
+		return false, err
+	}
+}
+
 // GameVariant returns just a game's variant. The edge layer uses it to map wire alphabet
 // indices to concrete letters before delegating to the letter-based play, exchange and
 // word-check methods, keeping a single domain path shared with the robot.
diff --git a/backend/internal/game/store.go b/backend/internal/game/store.go
index 4db9f3c..d5ab8e2 100644
--- a/backend/internal/game/store.go
+++ b/backend/internal/game/store.go
@@ -354,6 +354,26 @@ func (s *Store) SharedGameExists(ctx context.Context, a, b uuid.UUID) (bool, err
 	return len(rows) > 0, nil
 }
 
+// DeleteOpenGame removes a game only while it is still open (an auto-match game awaiting an
+// opponent), reporting whether a row was deleted. The starter's lone seat and any draft cascade
+// away with it. It no-ops (false) once the game has filled and become active, so a caller can
+// fall back to resigning the now-active seat. Used to clear a blocked player from matchmaking.
+func (s *Store) DeleteOpenGame(ctx context.Context, gameID uuid.UUID) (bool, error) {
+	stmt := table.Games.DELETE().WHERE(
+		table.Games.GameID.EQ(postgres.UUID(gameID)).
+			AND(table.Games.Status.EQ(postgres.String(StatusOpen))),
+	)
+	res, err := stmt.ExecContext(ctx, s.db)
+	if err != nil {
+		return false, fmt.Errorf("game: delete open game %s: %w", gameID, err)
+	}
+	n, err := res.RowsAffected()
+	if err != nil {
+		return false, fmt.Errorf("game: delete open game rows %s: %w", gameID, err)
+	}
+	return n > 0, nil
+}
+
 // ListGamesForAccount loads every game the account is seated in (active and
 // finished), newest first, each joined with its ordered seats. It backs the lobby's
 // "my games" lists.
diff --git a/backend/internal/inttest/forfeit_test.go b/backend/internal/inttest/forfeit_test.go
new file mode 100644
index 0000000..e5720f6
--- /dev/null
+++ b/backend/internal/inttest/forfeit_test.go
@@ -0,0 +1,123 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"testing"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/game"
+)
+
+// TestForfeitAllResignsActiveGame checks the game-side effect of a block on a two-player game:
+// ForfeitAllForAccount resigns the blocked player, finishing the game with the opponent winning.
+func TestForfeitAllResignsActiveGame(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	gid, seats := newGameWithSeats(t, 2) // seats[0] = blocked, seats[1] = opponent
+
+	n, err := svc.ForfeitAllForAccount(ctx, seats[0])
+	if err != nil {
+		t.Fatalf("forfeit all: %v", err)
+	}
+	if n < 1 {
+		t.Fatalf("forfeit count = %d, want at least 1", n)
+	}
+
+	g, err := svc.GameByID(ctx, gid)
+	if err != nil {
+		t.Fatalf("get game: %v", err)
+	}
+	if g.Status != game.StatusFinished {
+		t.Errorf("status = %q, want finished", g.Status)
+	}
+	if w := seatWinner(g, seats[0]); w {
+		t.Error("the blocked player must not be the winner")
+	}
+	if w := seatWinner(g, seats[1]); !w {
+		t.Error("the opponent must win when the blocked player forfeits")
+	}
+}
+
+// TestForfeitAllCancelsOpenGame checks that a block deletes the blocked player's open auto-match
+// game (no opponent to resign against), clearing it from the matchmaking pool.
+func TestForfeitAllCancelsOpenGame(t *testing.T) {
+	ctx := context.Background()
+	clearOpenGames(t)
+	svc := newGameService()
+	starter := provisionAccount(t)
+	g := openGame(t, svc, starter, evenOpeningSeed(t))
+
+	n, err := svc.ForfeitAllForAccount(ctx, starter)
+	if err != nil {
+		t.Fatalf("forfeit all: %v", err)
+	}
+	if n < 1 {
+		t.Fatalf("forfeit count = %d, want at least 1", n)
+	}
+	if c := gameRowCount(t, g.ID); c != 0 {
+		t.Errorf("open game rows after forfeit = %d, want 0 (deleted)", c)
+	}
+}
+
+// TestForfeitAllResignsSeatInMultiplayerGame checks that in a 3-player game the blocked player's
+// seat is resigned while the game continues for the remaining players.
+func TestForfeitAllResignsSeatInMultiplayerGame(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	gid, seats := newGameWithSeats(t, 3)
+
+	n, err := svc.ForfeitAllForAccount(ctx, seats[0])
+	if err != nil {
+		t.Fatalf("forfeit all: %v", err)
+	}
+	if n < 1 {
+		t.Fatalf("forfeit count = %d, want at least 1", n)
+	}
+
+	g, err := svc.GameByID(ctx, gid)
+	if err != nil {
+		t.Fatalf("get game: %v", err)
+	}
+	if g.Status != game.StatusActive {
+		t.Errorf("status = %q, want still active (two seats remain)", g.Status)
+	}
+	if c := resignMoveCount(t, gid, 0); c != 1 {
+		t.Errorf("resign moves for seat 0 = %d, want 1", c)
+	}
+}
+
+// seatWinner reports the is_winner flag for the given account's seat in g.
+func seatWinner(g game.Game, accountID uuid.UUID) bool {
+	for _, s := range g.Seats {
+		if s.AccountID == accountID {
+			return s.IsWinner
+		}
+	}
+	return false
+}
+
+// gameRowCount counts the rows in the games table for gameID (0 once it is deleted).
+func gameRowCount(t *testing.T, gameID uuid.UUID) int {
+	t.Helper()
+	var n int
+	if err := testDB.QueryRowContext(context.Background(),
+		`SELECT count(*) FROM backend.games WHERE game_id = $1`, gameID).Scan(&n); err != nil {
+		t.Fatalf("count game rows: %v", err)
+	}
+	return n
+}
+
+// resignMoveCount counts the resign moves journalled for a seat in a game.
+func resignMoveCount(t *testing.T, gameID uuid.UUID, seat int) int {
+	t.Helper()
+	var n int
+	if err := testDB.QueryRowContext(context.Background(),
+		`SELECT count(*) FROM backend.game_moves WHERE game_id = $1 AND action = 'resign' AND seat = $2`,
+		gameID, seat).Scan(&n); err != nil {
+		t.Fatalf("count resign moves: %v", err)
+	}
+	return n
+}
diff --git a/backend/internal/inttest/suspension_console_test.go b/backend/internal/inttest/suspension_console_test.go
new file mode 100644
index 0000000..dea8948
--- /dev/null
+++ b/backend/internal/inttest/suspension_console_test.go
@@ -0,0 +1,121 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strings"
+	"testing"
+
+	"go.uber.org/zap/zaptest"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/game"
+	"scrabble/backend/internal/server"
+)
+
+// TestConsoleBlockAndUnblock drives the admin console block flow through HTTP: blocking a user
+// records the suspension and forfeits their active game, the user card renders both branches,
+// and unblocking lifts it.
+func TestConsoleBlockAndUnblock(t *testing.T) {
+	ctx := context.Background()
+	accounts := account.NewStore(testDB)
+	games := newGameService()
+	srv := consoleServer(t, accounts, games)
+
+	gid, seats := newGameWithSeats(t, 2)
+	blocked := seats[0]
+
+	// The card renders the not-blocked branch before any block.
+	if rec := consoleGet(t, srv, "/_gm/users/"+blocked.String()); rec.Code != http.StatusOK {
+		t.Fatalf("user card before block = %d, want 200", rec.Code)
+	}
+
+	// Block permanently via the console.
+	if rec := consolePost(t, srv, "/_gm/users/"+blocked.String()+"/block", url.Values{"duration": {"permanent"}}); rec.Code != http.StatusOK {
+		t.Fatalf("console block = %d, want 200", rec.Code)
+	}
+	if _, ok, err := accounts.CurrentSuspension(ctx, blocked); err != nil || !ok {
+		t.Fatalf("after console block: blocked=%v err=%v, want blocked", ok, err)
+	}
+	if g, err := games.GameByID(ctx, gid); err != nil || g.Status != game.StatusFinished {
+		t.Fatalf("game after block: status=%q err=%v, want finished", g.Status, err)
+	}
+
+	// The card renders the blocked branch.
+	if rec := consoleGet(t, srv, "/_gm/users/"+blocked.String()); rec.Code != http.StatusOK {
+		t.Fatalf("user card after block = %d, want 200", rec.Code)
+	}
+
+	// Unblock via the console.
+	if rec := consolePost(t, srv, "/_gm/users/"+blocked.String()+"/unblock", url.Values{}); rec.Code != http.StatusOK {
+		t.Fatalf("console unblock = %d, want 200", rec.Code)
+	}
+	if _, ok, err := accounts.CurrentSuspension(ctx, blocked); err != nil || ok {
+		t.Fatalf("after console unblock: blocked=%v err=%v, want not blocked", ok, err)
+	}
+}
+
+// TestConsoleReasonsCRUD drives reason creation through the console and checks the page renders.
+func TestConsoleReasonsCRUD(t *testing.T) {
+	ctx := context.Background()
+	accounts := account.NewStore(testDB)
+	srv := consoleServer(t, accounts, newGameService())
+
+	if rec := consoleGet(t, srv, "/_gm/reasons"); rec.Code != http.StatusOK {
+		t.Fatalf("reasons page = %d, want 200", rec.Code)
+	}
+	form := url.Values{"text_en": {"Console reason"}, "text_ru": {"Причина из консоли"}}
+	if rec := consolePost(t, srv, "/_gm/reasons", form); rec.Code != http.StatusOK {
+		t.Fatalf("console create reason = %d, want 200", rec.Code)
+	}
+	reasons, err := accounts.ListReasons(ctx)
+	if err != nil {
+		t.Fatalf("list reasons: %v", err)
+	}
+	found := false
+	for _, r := range reasons {
+		if r.TextEn == "Console reason" && r.TextRu == "Причина из консоли" {
+			found = true
+		}
+	}
+	if !found {
+		t.Error("reason created via the console was not found")
+	}
+}
+
+// consoleServer assembles a server with the admin console mounted (it needs accounts, games and a
+// registry).
+func consoleServer(t *testing.T, accounts *account.Store, games *game.Service) *server.Server {
+	t.Helper()
+	return server.New(":0", server.Deps{
+		Logger:   zaptest.NewLogger(t),
+		DB:       testDB,
+		Accounts: accounts,
+		Games:    games,
+		Registry: testRegistry,
+		DictDir:  dictDir(),
+	})
+}
+
+// consoleGet issues a console GET (a safe method, so the same-origin guard passes).
+func consoleGet(t *testing.T, srv *server.Server, path string) *httptest.ResponseRecorder {
+	t.Helper()
+	rec := httptest.NewRecorder()
+	srv.Handler().ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "http://example.com"+path, nil))
+	return rec
+}
+
+// consolePost issues a same-origin form POST to the console.
+func consolePost(t *testing.T, srv *server.Server, path string, form url.Values) *httptest.ResponseRecorder {
+	t.Helper()
+	req := httptest.NewRequest(http.MethodPost, "http://example.com"+path, strings.NewReader(form.Encode()))
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	req.Header.Set("Origin", "http://example.com")
+	rec := httptest.NewRecorder()
+	srv.Handler().ServeHTTP(rec, req)
+	return rec
+}
diff --git a/backend/internal/inttest/suspension_gate_test.go b/backend/internal/inttest/suspension_gate_test.go
new file mode 100644
index 0000000..27555f8
--- /dev/null
+++ b/backend/internal/inttest/suspension_gate_test.go
@@ -0,0 +1,151 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"go.uber.org/zap/zaptest"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/server"
+)
+
+// blockStatusBody mirrors the backend's /block-status JSON for the test.
+type blockStatusBody struct {
+	Blocked   bool   `json:"blocked"`
+	Permanent bool   `json:"permanent"`
+	Until     string `json:"until"`
+	Reason    string `json:"reason"`
+}
+
+// TestSuspensionGate drives the gate end-to-end through the assembled HTTP server: a blocked
+// account is refused on a normal user route with 403 + account_blocked, the block-status probe
+// stays reachable and resolves the reason to the account's language, and an unblock restores
+// access.
+func TestSuspensionGate(t *testing.T) {
+	ctx := context.Background()
+	accounts := account.NewStore(testDB)
+	srv := server.New(":0", server.Deps{
+		Logger:   zaptest.NewLogger(t),
+		DB:       testDB,
+		Accounts: accounts,
+	})
+
+	acc, err := accounts.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "ru", "", "Blocked")
+	if err != nil {
+		t.Fatalf("provision: %v", err)
+	}
+	id := acc.ID
+
+	// Not blocked: a normal route passes and block-status reports false.
+	if rec := userGet(t, srv, "/api/v1/user/profile", id); rec.Code != http.StatusOK {
+		t.Fatalf("profile before block = %d, want 200", rec.Code)
+	}
+	if bs := blockStatus(t, srv, id); bs.Blocked {
+		t.Fatal("fresh account should not be blocked")
+	}
+
+	// Block permanently with a reason.
+	if _, err := accounts.Suspend(ctx, id, nil, "Spam", "Спам", nil); err != nil {
+		t.Fatalf("suspend: %v", err)
+	}
+
+	// A normal route is now refused with the stable code.
+	rec := userGet(t, srv, "/api/v1/user/profile", id)
+	if rec.Code != http.StatusForbidden {
+		t.Fatalf("profile while blocked = %d, want 403", rec.Code)
+	}
+	if code := errorCode(t, rec); code != "account_blocked" {
+		t.Fatalf("error code = %q, want account_blocked", code)
+	}
+
+	// The block-status probe stays reachable and resolves the reason to the account's language.
+	bs := blockStatus(t, srv, id)
+	if !bs.Blocked || !bs.Permanent {
+		t.Fatalf("block-status = %+v, want blocked+permanent", bs)
+	}
+	if bs.Reason != "Спам" {
+		t.Errorf("reason = %q, want the Russian snapshot Спам", bs.Reason)
+	}
+	if bs.Until != "" {
+		t.Errorf("until = %q, want empty for a permanent block", bs.Until)
+	}
+
+	// Unblock restores access.
+	if err := accounts.LiftSuspension(ctx, id); err != nil {
+		t.Fatalf("lift: %v", err)
+	}
+	if rec := userGet(t, srv, "/api/v1/user/profile", id); rec.Code != http.StatusOK {
+		t.Fatalf("profile after unblock = %d, want 200", rec.Code)
+	}
+}
+
+// TestSuspensionGateTemporaryUntil checks a temporary block reports its expiry through
+// block-status as a future RFC3339 instant and not permanent.
+func TestSuspensionGateTemporaryUntil(t *testing.T) {
+	ctx := context.Background()
+	accounts := account.NewStore(testDB)
+	srv := server.New(":0", server.Deps{Logger: zaptest.NewLogger(t), DB: testDB, Accounts: accounts})
+	id := provisionAccount(t)
+
+	until := time.Now().Add(24 * time.Hour)
+	if _, err := accounts.Suspend(ctx, id, &until, "", "", nil); err != nil {
+		t.Fatalf("suspend: %v", err)
+	}
+	bs := blockStatus(t, srv, id)
+	if !bs.Blocked || bs.Permanent {
+		t.Fatalf("block-status = %+v, want blocked, not permanent", bs)
+	}
+	parsed, err := time.Parse(time.RFC3339, bs.Until)
+	if err != nil {
+		t.Fatalf("until %q is not RFC3339: %v", bs.Until, err)
+	}
+	if !parsed.After(time.Now()) {
+		t.Errorf("until = %v, want a future instant", parsed)
+	}
+}
+
+// userGet issues an authenticated GET (X-User-ID) against the assembled server.
+func userGet(t *testing.T, srv *server.Server, path string, id uuid.UUID) *httptest.ResponseRecorder {
+	t.Helper()
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodGet, path, nil)
+	req.Header.Set("X-User-ID", id.String())
+	srv.Handler().ServeHTTP(rec, req)
+	return rec
+}
+
+// blockStatus fetches and decodes the /block-status payload, asserting a 200.
+func blockStatus(t *testing.T, srv *server.Server, id uuid.UUID) blockStatusBody {
+	t.Helper()
+	rec := userGet(t, srv, "/api/v1/user/block-status", id)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("block-status status = %d, want 200", rec.Code)
+	}
+	var b blockStatusBody
+	if err := json.Unmarshal(rec.Body.Bytes(), &b); err != nil {
+		t.Fatalf("decode block-status: %v", err)
+	}
+	return b
+}
+
+// errorCode extracts the stable code from the backend error envelope.
+func errorCode(t *testing.T, rec *httptest.ResponseRecorder) string {
+	t.Helper()
+	var e struct {
+		Error struct {
+			Code string `json:"code"`
+		} `json:"error"`
+	}
+	if err := json.Unmarshal(rec.Body.Bytes(), &e); err != nil {
+		t.Fatalf("decode error envelope: %v", err)
+	}
+	return e.Error.Code
+}
diff --git a/backend/internal/inttest/suspension_test.go b/backend/internal/inttest/suspension_test.go
new file mode 100644
index 0000000..32546f4
--- /dev/null
+++ b/backend/internal/inttest/suspension_test.go
@@ -0,0 +1,209 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/account"
+)
+
+// TestSuspensionRoundTrip covers a permanent block: a fresh account is not blocked, Suspend with
+// a reason makes CurrentSuspension report it (permanent, with the en/ru snapshot resolved per
+// language), and LiftSuspension reverses it.
+func TestSuspensionRoundTrip(t *testing.T) {
+	ctx := context.Background()
+	store := account.NewStore(testDB)
+	id := provisionAccount(t)
+
+	if _, ok, err := store.CurrentSuspension(ctx, id); err != nil || ok {
+		t.Fatalf("fresh CurrentSuspension = (ok %v, err %v), want (false, nil)", ok, err)
+	}
+
+	if _, err := store.Suspend(ctx, id, nil, "Spam", "Спам", nil); err != nil {
+		t.Fatalf("suspend: %v", err)
+	}
+
+	susp, ok, err := store.CurrentSuspension(ctx, id)
+	if err != nil || !ok {
+		t.Fatalf("CurrentSuspension after suspend = (ok %v, err %v), want (true, nil)", ok, err)
+	}
+	if !susp.Permanent() {
+		t.Errorf("Permanent() = false, want true for a nil-until block")
+	}
+	if got := susp.LocalizedReason("en"); got != "Spam" {
+		t.Errorf("LocalizedReason(en) = %q, want Spam", got)
+	}
+	if got := susp.LocalizedReason("ru"); got != "Спам" {
+		t.Errorf("LocalizedReason(ru) = %q, want Спам", got)
+	}
+	if got := susp.LocalizedReason("fr"); got != "Spam" {
+		t.Errorf("LocalizedReason(fr) = %q, want the English fallback Spam", got)
+	}
+
+	if err := store.LiftSuspension(ctx, id); err != nil {
+		t.Fatalf("lift: %v", err)
+	}
+	if _, ok, err := store.CurrentSuspension(ctx, id); err != nil || ok {
+		t.Fatalf("CurrentSuspension after lift = (ok %v, err %v), want (false, nil)", ok, err)
+	}
+}
+
+// TestTemporarySuspensionExpiry checks the until boundary: a future expiry is in force (and not
+// permanent), while a past expiry is already not in force.
+func TestTemporarySuspensionExpiry(t *testing.T) {
+	ctx := context.Background()
+	store := account.NewStore(testDB)
+
+	future := provisionAccount(t)
+	until := time.Now().Add(time.Hour)
+	if _, err := store.Suspend(ctx, future, &until, "", "", nil); err != nil {
+		t.Fatalf("suspend future: %v", err)
+	}
+	susp, ok, err := store.CurrentSuspension(ctx, future)
+	if err != nil || !ok {
+		t.Fatalf("future CurrentSuspension = (ok %v, err %v), want (true, nil)", ok, err)
+	}
+	if susp.Permanent() {
+		t.Error("Permanent() = true, want false for a dated block")
+	}
+	if susp.BlockedUntil == nil || !susp.BlockedUntil.After(time.Now()) {
+		t.Errorf("BlockedUntil = %v, want a future instant", susp.BlockedUntil)
+	}
+
+	past := provisionAccount(t)
+	expired := time.Now().Add(-time.Hour)
+	if _, err := store.Suspend(ctx, past, &expired, "", "", nil); err != nil {
+		t.Fatalf("suspend past: %v", err)
+	}
+	if _, ok, err := store.CurrentSuspension(ctx, past); err != nil || ok {
+		t.Fatalf("expired CurrentSuspension = (ok %v, err %v), want (false, nil)", ok, err)
+	}
+}
+
+// TestSuspensionStrongestWins checks that with overlapping blocks CurrentSuspension returns the
+// strongest — a permanent block outranks any dated one — and that LiftSuspension clears them all.
+func TestSuspensionStrongestWins(t *testing.T) {
+	ctx := context.Background()
+	store := account.NewStore(testDB)
+	id := provisionAccount(t)
+
+	soon := time.Now().Add(time.Hour)
+	if _, err := store.Suspend(ctx, id, &soon, "", "", nil); err != nil {
+		t.Fatalf("suspend dated: %v", err)
+	}
+	if _, err := store.Suspend(ctx, id, nil, "", "", nil); err != nil {
+		t.Fatalf("suspend permanent: %v", err)
+	}
+	later := time.Now().Add(2 * time.Hour)
+	if _, err := store.Suspend(ctx, id, &later, "", "", nil); err != nil {
+		t.Fatalf("suspend dated-later: %v", err)
+	}
+
+	susp, ok, err := store.CurrentSuspension(ctx, id)
+	if err != nil || !ok {
+		t.Fatalf("CurrentSuspension = (ok %v, err %v), want (true, nil)", ok, err)
+	}
+	if !susp.Permanent() {
+		t.Error("strongest block should be the permanent one")
+	}
+
+	if err := store.LiftSuspension(ctx, id); err != nil {
+		t.Fatalf("lift: %v", err)
+	}
+	if _, ok, err := store.CurrentSuspension(ctx, id); err != nil || ok {
+		t.Fatalf("CurrentSuspension after lift = (ok %v, err %v), want (false, nil)", ok, err)
+	}
+}
+
+// TestReasonsCRUD covers the operator-editable picklist: create, list, get, update, delete, and
+// the ErrNotFound paths.
+func TestReasonsCRUD(t *testing.T) {
+	ctx := context.Background()
+	store := account.NewStore(testDB)
+
+	created, err := store.CreateReason(ctx, "Cheating", "Читерство")
+	if err != nil {
+		t.Fatalf("create reason: %v", err)
+	}
+	if created.ID == uuid.Nil || created.TextEn != "Cheating" || created.TextRu != "Читерство" {
+		t.Fatalf("created reason = %+v, want populated en/ru and id", created)
+	}
+
+	got, err := store.GetReason(ctx, created.ID)
+	if err != nil {
+		t.Fatalf("get reason: %v", err)
+	}
+	if got.TextEn != "Cheating" {
+		t.Errorf("get TextEn = %q, want Cheating", got.TextEn)
+	}
+
+	list, err := store.ListReasons(ctx)
+	if err != nil {
+		t.Fatalf("list reasons: %v", err)
+	}
+	if !containsReason(list, created.ID) {
+		t.Error("created reason missing from ListReasons")
+	}
+
+	updated, err := store.UpdateReason(ctx, created.ID, "Abuse", "Оскорбления")
+	if err != nil {
+		t.Fatalf("update reason: %v", err)
+	}
+	if updated.TextEn != "Abuse" || updated.TextRu != "Оскорбления" {
+		t.Errorf("updated reason = %+v, want Abuse/Оскорбления", updated)
+	}
+
+	if err := store.DeleteReason(ctx, created.ID); err != nil {
+		t.Fatalf("delete reason: %v", err)
+	}
+	if _, err := store.GetReason(ctx, created.ID); !errors.Is(err, account.ErrNotFound) {
+		t.Errorf("get deleted reason = %v, want ErrNotFound", err)
+	}
+	if _, err := store.UpdateReason(ctx, uuid.New(), "x", "y"); !errors.Is(err, account.ErrNotFound) {
+		t.Errorf("update missing reason = %v, want ErrNotFound", err)
+	}
+}
+
+// TestSuspensionReasonSnapshotSurvivesDelete checks that a block keeps the reason text it was
+// stamped with even after the picklist entry is deleted (the FK nulls reason_id, the snapshot
+// stays).
+func TestSuspensionReasonSnapshotSurvivesDelete(t *testing.T) {
+	ctx := context.Background()
+	store := account.NewStore(testDB)
+	id := provisionAccount(t)
+
+	reason, err := store.CreateReason(ctx, "Toxicity", "Токсичность")
+	if err != nil {
+		t.Fatalf("create reason: %v", err)
+	}
+	if _, err := store.Suspend(ctx, id, nil, reason.TextEn, reason.TextRu, &reason.ID); err != nil {
+		t.Fatalf("suspend with reason: %v", err)
+	}
+	if err := store.DeleteReason(ctx, reason.ID); err != nil {
+		t.Fatalf("delete reason: %v", err)
+	}
+
+	susp, ok, err := store.CurrentSuspension(ctx, id)
+	if err != nil || !ok {
+		t.Fatalf("CurrentSuspension = (ok %v, err %v), want (true, nil)", ok, err)
+	}
+	if susp.LocalizedReason("en") != "Toxicity" || susp.LocalizedReason("ru") != "Токсичность" {
+		t.Errorf("reason snapshot lost after delete: en=%q ru=%q", susp.LocalizedReason("en"), susp.LocalizedReason("ru"))
+	}
+}
+
+// containsReason reports whether list holds a reason with the given id.
+func containsReason(list []account.Reason, id uuid.UUID) bool {
+	for _, r := range list {
+		if r.ID == id {
+			return true
+		}
+	}
+	return false
+}
diff --git a/backend/internal/postgres/jet/backend/model/account_suspensions.go b/backend/internal/postgres/jet/backend/model/account_suspensions.go
new file mode 100644
index 0000000..5163231
--- /dev/null
+++ b/backend/internal/postgres/jet/backend/model/account_suspensions.go
@@ -0,0 +1,24 @@
+//
+// Code generated by go-jet DO NOT EDIT.
+//
+// WARNING: Changes to this file may cause incorrect behavior
+// and will be lost if the code is regenerated
+//
+
+package model
+
+import (
+	"github.com/google/uuid"
+	"time"
+)
+
+type AccountSuspensions struct {
+	SuspensionID uuid.UUID `sql:"primary_key"`
+	AccountID    uuid.UUID
+	BlockedAt    time.Time
+	BlockedUntil *time.Time
+	ReasonEn     *string
+	ReasonRu     *string
+	ReasonID     *uuid.UUID
+	LiftedAt     *time.Time
+}
diff --git a/backend/internal/postgres/jet/backend/model/suspension_reasons.go b/backend/internal/postgres/jet/backend/model/suspension_reasons.go
new file mode 100644
index 0000000..176dc17
--- /dev/null
+++ b/backend/internal/postgres/jet/backend/model/suspension_reasons.go
@@ -0,0 +1,21 @@
+//
+// Code generated by go-jet DO NOT EDIT.
+//
+// WARNING: Changes to this file may cause incorrect behavior
+// and will be lost if the code is regenerated
+//
+
+package model
+
+import (
+	"github.com/google/uuid"
+	"time"
+)
+
+type SuspensionReasons struct {
+	ReasonID  uuid.UUID `sql:"primary_key"`
+	TextEn    string
+	TextRu    string
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}
diff --git a/backend/internal/postgres/jet/backend/table/account_suspensions.go b/backend/internal/postgres/jet/backend/table/account_suspensions.go
new file mode 100644
index 0000000..4c66947
--- /dev/null
+++ b/backend/internal/postgres/jet/backend/table/account_suspensions.go
@@ -0,0 +1,99 @@
+//
+// Code generated by go-jet DO NOT EDIT.
+//
+// WARNING: Changes to this file may cause incorrect behavior
+// and will be lost if the code is regenerated
+//
+
+package table
+
+import (
+	"github.com/go-jet/jet/v2/postgres"
+)
+
+var AccountSuspensions = newAccountSuspensionsTable("backend", "account_suspensions", "")
+
+type accountSuspensionsTable struct {
+	postgres.Table
+
+	// Columns
+	SuspensionID postgres.ColumnString
+	AccountID    postgres.ColumnString
+	BlockedAt    postgres.ColumnTimestampz
+	BlockedUntil postgres.ColumnTimestampz
+	ReasonEn     postgres.ColumnString
+	ReasonRu     postgres.ColumnString
+	ReasonID     postgres.ColumnString
+	LiftedAt     postgres.ColumnTimestampz
+
+	AllColumns     postgres.ColumnList
+	MutableColumns postgres.ColumnList
+	DefaultColumns postgres.ColumnList
+}
+
+type AccountSuspensionsTable struct {
+	accountSuspensionsTable
+
+	EXCLUDED accountSuspensionsTable
+}
+
+// AS creates new AccountSuspensionsTable with assigned alias
+func (a AccountSuspensionsTable) AS(alias string) *AccountSuspensionsTable {
+	return newAccountSuspensionsTable(a.SchemaName(), a.TableName(), alias)
+}
+
+// Schema creates new AccountSuspensionsTable with assigned schema name
+func (a AccountSuspensionsTable) FromSchema(schemaName string) *AccountSuspensionsTable {
+	return newAccountSuspensionsTable(schemaName, a.TableName(), a.Alias())
+}
+
+// WithPrefix creates new AccountSuspensionsTable with assigned table prefix
+func (a AccountSuspensionsTable) WithPrefix(prefix string) *AccountSuspensionsTable {
+	return newAccountSuspensionsTable(a.SchemaName(), prefix+a.TableName(), a.TableName())
+}
+
+// WithSuffix creates new AccountSuspensionsTable with assigned table suffix
+func (a AccountSuspensionsTable) WithSuffix(suffix string) *AccountSuspensionsTable {
+	return newAccountSuspensionsTable(a.SchemaName(), a.TableName()+suffix, a.TableName())
+}
+
+func newAccountSuspensionsTable(schemaName, tableName, alias string) *AccountSuspensionsTable {
+	return &AccountSuspensionsTable{
+		accountSuspensionsTable: newAccountSuspensionsTableImpl(schemaName, tableName, alias),
+		EXCLUDED:                newAccountSuspensionsTableImpl("", "excluded", ""),
+	}
+}
+
+func newAccountSuspensionsTableImpl(schemaName, tableName, alias string) accountSuspensionsTable {
+	var (
+		SuspensionIDColumn = postgres.StringColumn("suspension_id")
+		AccountIDColumn    = postgres.StringColumn("account_id")
+		BlockedAtColumn    = postgres.TimestampzColumn("blocked_at")
+		BlockedUntilColumn = postgres.TimestampzColumn("blocked_until")
+		ReasonEnColumn     = postgres.StringColumn("reason_en")
+		ReasonRuColumn     = postgres.StringColumn("reason_ru")
+		ReasonIDColumn     = postgres.StringColumn("reason_id")
+		LiftedAtColumn     = postgres.TimestampzColumn("lifted_at")
+		allColumns         = postgres.ColumnList{SuspensionIDColumn, AccountIDColumn, BlockedAtColumn, BlockedUntilColumn, ReasonEnColumn, ReasonRuColumn, ReasonIDColumn, LiftedAtColumn}
+		mutableColumns     = postgres.ColumnList{AccountIDColumn, BlockedAtColumn, BlockedUntilColumn, ReasonEnColumn, ReasonRuColumn, ReasonIDColumn, LiftedAtColumn}
+		defaultColumns     = postgres.ColumnList{BlockedAtColumn}
+	)
+
+	return accountSuspensionsTable{
+		Table: postgres.NewTable(schemaName, tableName, alias, allColumns...),
+
+		//Columns
+		SuspensionID: SuspensionIDColumn,
+		AccountID:    AccountIDColumn,
+		BlockedAt:    BlockedAtColumn,
+		BlockedUntil: BlockedUntilColumn,
+		ReasonEn:     ReasonEnColumn,
+		ReasonRu:     ReasonRuColumn,
+		ReasonID:     ReasonIDColumn,
+		LiftedAt:     LiftedAtColumn,
+
+		AllColumns:     allColumns,
+		MutableColumns: mutableColumns,
+		DefaultColumns: defaultColumns,
+	}
+}
diff --git a/backend/internal/postgres/jet/backend/table/suspension_reasons.go b/backend/internal/postgres/jet/backend/table/suspension_reasons.go
new file mode 100644
index 0000000..1ca7f2e
--- /dev/null
+++ b/backend/internal/postgres/jet/backend/table/suspension_reasons.go
@@ -0,0 +1,90 @@
+//
+// Code generated by go-jet DO NOT EDIT.
+//
+// WARNING: Changes to this file may cause incorrect behavior
+// and will be lost if the code is regenerated
+//
+
+package table
+
+import (
+	"github.com/go-jet/jet/v2/postgres"
+)
+
+var SuspensionReasons = newSuspensionReasonsTable("backend", "suspension_reasons", "")
+
+type suspensionReasonsTable struct {
+	postgres.Table
+
+	// Columns
+	ReasonID  postgres.ColumnString
+	TextEn    postgres.ColumnString
+	TextRu    postgres.ColumnString
+	CreatedAt postgres.ColumnTimestampz
+	UpdatedAt postgres.ColumnTimestampz
+
+	AllColumns     postgres.ColumnList
+	MutableColumns postgres.ColumnList
+	DefaultColumns postgres.ColumnList
+}
+
+type SuspensionReasonsTable struct {
+	suspensionReasonsTable
+
+	EXCLUDED suspensionReasonsTable
+}
+
+// AS creates new SuspensionReasonsTable with assigned alias
+func (a SuspensionReasonsTable) AS(alias string) *SuspensionReasonsTable {
+	return newSuspensionReasonsTable(a.SchemaName(), a.TableName(), alias)
+}
+
+// Schema creates new SuspensionReasonsTable with assigned schema name
+func (a SuspensionReasonsTable) FromSchema(schemaName string) *SuspensionReasonsTable {
+	return newSuspensionReasonsTable(schemaName, a.TableName(), a.Alias())
+}
+
+// WithPrefix creates new SuspensionReasonsTable with assigned table prefix
+func (a SuspensionReasonsTable) WithPrefix(prefix string) *SuspensionReasonsTable {
+	return newSuspensionReasonsTable(a.SchemaName(), prefix+a.TableName(), a.TableName())
+}
+
+// WithSuffix creates new SuspensionReasonsTable with assigned table suffix
+func (a SuspensionReasonsTable) WithSuffix(suffix string) *SuspensionReasonsTable {
+	return newSuspensionReasonsTable(a.SchemaName(), a.TableName()+suffix, a.TableName())
+}
+
+func newSuspensionReasonsTable(schemaName, tableName, alias string) *SuspensionReasonsTable {
+	return &SuspensionReasonsTable{
+		suspensionReasonsTable: newSuspensionReasonsTableImpl(schemaName, tableName, alias),
+		EXCLUDED:               newSuspensionReasonsTableImpl("", "excluded", ""),
+	}
+}
+
+func newSuspensionReasonsTableImpl(schemaName, tableName, alias string) suspensionReasonsTable {
+	var (
+		ReasonIDColumn  = postgres.StringColumn("reason_id")
+		TextEnColumn    = postgres.StringColumn("text_en")
+		TextRuColumn    = postgres.StringColumn("text_ru")
+		CreatedAtColumn = postgres.TimestampzColumn("created_at")
+		UpdatedAtColumn = postgres.TimestampzColumn("updated_at")
+		allColumns      = postgres.ColumnList{ReasonIDColumn, TextEnColumn, TextRuColumn, CreatedAtColumn, UpdatedAtColumn}
+		mutableColumns  = postgres.ColumnList{TextEnColumn, TextRuColumn, CreatedAtColumn, UpdatedAtColumn}
+		defaultColumns  = postgres.ColumnList{CreatedAtColumn, UpdatedAtColumn}
+	)
+
+	return suspensionReasonsTable{
+		Table: postgres.NewTable(schemaName, tableName, alias, allColumns...),
+
+		//Columns
+		ReasonID:  ReasonIDColumn,
+		TextEn:    TextEnColumn,
+		TextRu:    TextRuColumn,
+		CreatedAt: CreatedAtColumn,
+		UpdatedAt: UpdatedAtColumn,
+
+		AllColumns:     allColumns,
+		MutableColumns: mutableColumns,
+		DefaultColumns: defaultColumns,
+	}
+}
diff --git a/backend/internal/postgres/jet/backend/table/table_use_schema.go b/backend/internal/postgres/jet/backend/table/table_use_schema.go
index 8f79b5d..60f5d15 100644
--- a/backend/internal/postgres/jet/backend/table/table_use_schema.go
+++ b/backend/internal/postgres/jet/backend/table/table_use_schema.go
@@ -11,6 +11,7 @@ package table
 // this method only once at the beginning of the program.
 func UseSchema(schema string) {
 	AccountStats = AccountStats.FromSchema(schema)
+	AccountSuspensions = AccountSuspensions.FromSchema(schema)
 	Accounts = Accounts.FromSchema(schema)
 	Blocks = Blocks.FromSchema(schema)
 	ChatMessages = ChatMessages.FromSchema(schema)
@@ -28,4 +29,5 @@ func UseSchema(schema string) {
 	Games = Games.FromSchema(schema)
 	Identities = Identities.FromSchema(schema)
 	Sessions = Sessions.FromSchema(schema)
+	SuspensionReasons = SuspensionReasons.FromSchema(schema)
 }
diff --git a/backend/internal/postgres/migrations/00003_account_suspensions.sql b/backend/internal/postgres/migrations/00003_account_suspensions.sql
new file mode 100644
index 0000000..26e6639
--- /dev/null
+++ b/backend/internal/postgres/migrations/00003_account_suspensions.sql
@@ -0,0 +1,45 @@
+-- +goose Up
+-- Manual account blocking ("suspension"), the operator's hard counterpart to the soft,
+-- reversible accounts.flagged_high_rate_at marker. Named "suspension" throughout the schema
+-- and Go to stay distinct from the peer-to-peer `blocks` table (one player muting another);
+-- the wire/UI vocabulary the player sees is "blocked". A suspension forces the player to
+-- forfeit every active game and replaces their whole UI with a terminal "blocked" screen until
+-- it is lifted or (for a temporary one) expires. See docs/ARCHITECTURE.md §12.
+SET search_path = backend, pg_catalog;
+
+-- The operator-editable reason picklist, one row per reason with its English and Russian text.
+-- A suspension snapshots the chosen text (account_suspensions.reason_en/ru), so editing or
+-- deleting a reason here never changes or breaks a reason already shown to a blocked player.
+CREATE TABLE suspension_reasons (
+    reason_id  uuid        PRIMARY KEY,
+    text_en    text        NOT NULL,
+    text_ru    text        NOT NULL,
+    created_at timestamptz NOT NULL DEFAULT now(),
+    updated_at timestamptz NOT NULL DEFAULT now()
+);
+
+-- The block history: one row per block. blocked_until is NULL for a permanent block and the
+-- expiry instant for a temporary one; lifted_at is stamped when an operator unblocks early.
+-- reason_en/reason_ru are the text snapshot taken at block time (NULL when no reason was
+-- cited); reason_id keeps a loose link to the picklist entry for later analytics and is nulled
+-- if that entry is deleted (the snapshot remains the source of truth shown to the player). An
+-- account is currently blocked when its newest row has lifted_at IS NULL AND (blocked_until IS
+-- NULL OR blocked_until > now()).
+CREATE TABLE account_suspensions (
+    suspension_id uuid        PRIMARY KEY,
+    account_id    uuid        NOT NULL REFERENCES accounts (account_id) ON DELETE CASCADE,
+    blocked_at    timestamptz NOT NULL DEFAULT now(),
+    blocked_until timestamptz,
+    reason_en     text,
+    reason_ru     text,
+    reason_id     uuid        REFERENCES suspension_reasons (reason_id) ON DELETE SET NULL,
+    lifted_at     timestamptz
+);
+-- The enforcement gate looks up the newest suspension for an account on every authenticated
+-- request; this index serves that "latest by account" probe.
+CREATE INDEX account_suspensions_account_idx ON account_suspensions (account_id, blocked_at DESC);
+
+-- +goose Down
+SET search_path = backend, pg_catalog;
+DROP TABLE IF EXISTS account_suspensions;
+DROP TABLE IF EXISTS suspension_reasons;
diff --git a/backend/internal/server/handlers.go b/backend/internal/server/handlers.go
index 57ac6e3..7f49515 100644
--- a/backend/internal/server/handlers.go
+++ b/backend/internal/server/handlers.go
@@ -46,6 +46,9 @@ func (s *Server) registerRoutes() {
 		u.GET("/profile", s.handleProfile)
 		u.PUT("/profile", s.handleUpdateProfile)
 		u.GET("/stats", s.handleStats)
+		// Exempt from the suspension gate (see requireNotSuspended): the one endpoint a blocked
+		// client may still reach, to fetch the block's expiry and reason for the blocked screen.
+		u.GET("/block-status", s.handleBlockStatus)
 	}
 	if s.links != nil {
 		// Account linking & merge. The request step always mails a code;
diff --git a/backend/internal/server/handlers_account.go b/backend/internal/server/handlers_account.go
index 27a44ef..1bd974a 100644
--- a/backend/internal/server/handlers_account.go
+++ b/backend/internal/server/handlers_account.go
@@ -86,6 +86,48 @@ func (s *Server) handleUpdateProfile(c *gin.Context) {
 	c.JSON(http.StatusOK, profileResponseFor(acc))
 }
 
+// blockStatusResponse reports the caller's current block to the client. Until is an RFC3339 UTC
+// instant for a temporary block and empty for a permanent one (or when not blocked); Reason is
+// the operator-set reason resolved to the account's language, empty when none was cited. It is
+// the one payload a blocked client can still fetch, behind the suspension gate's exemption.
+type blockStatusResponse struct {
+	Blocked   bool   `json:"blocked"`
+	Permanent bool   `json:"permanent"`
+	Until     string `json:"until,omitempty"`
+	Reason    string `json:"reason,omitempty"`
+}
+
+// handleBlockStatus reports whether the caller is blocked and, if so, the block's expiry and the
+// reason resolved to the account's language. The suspension gate exempts this route so a blocked
+// client can render the terminal blocked screen.
+func (s *Server) handleBlockStatus(c *gin.Context) {
+	uid, ok := userID(c)
+	if !ok {
+		abortBadRequest(c, "missing identity")
+		return
+	}
+	susp, blocked, err := s.accounts.CurrentSuspension(c.Request.Context(), uid)
+	if err != nil {
+		s.abortErr(c, err)
+		return
+	}
+	resp := blockStatusResponse{Blocked: blocked}
+	if blocked {
+		resp.Permanent = susp.Permanent()
+		if susp.BlockedUntil != nil {
+			resp.Until = susp.BlockedUntil.UTC().Format(time.RFC3339)
+		}
+		// Resolve the reason snapshot to the account's interface language; fall back to English
+		// if the account row cannot be read for some reason.
+		lang := "en"
+		if acc, err := s.accounts.GetByID(c.Request.Context(), uid); err == nil {
+			lang = acc.PreferredLanguage
+		}
+		resp.Reason = susp.LocalizedReason(lang)
+	}
+	c.JSON(http.StatusOK, resp)
+}
+
 // handleStats returns the caller's lifetime statistics.
 func (s *Server) handleStats(c *gin.Context) {
 	uid, ok := userID(c)
diff --git a/backend/internal/server/handlers_admin_console.go b/backend/internal/server/handlers_admin_console.go
index 6a765ea..53dbe96 100644
--- a/backend/internal/server/handlers_admin_console.go
+++ b/backend/internal/server/handlers_admin_console.go
@@ -51,6 +51,12 @@ func (s *Server) registerConsole(router *gin.Engine) {
 	gm.GET("/users/:id", s.consoleUserDetail)
 	gm.POST("/users/:id/message", s.consoleUserMessage)
 	gm.POST("/users/:id/clear-high-rate-flag", s.consoleClearHighRateFlag)
+	gm.POST("/users/:id/block", s.consoleBlockUser)
+	gm.POST("/users/:id/unblock", s.consoleUnblockUser)
+	gm.GET("/reasons", s.consoleReasons)
+	gm.POST("/reasons", s.consoleCreateReason)
+	gm.POST("/reasons/:id/update", s.consoleUpdateReason)
+	gm.POST("/reasons/:id/delete", s.consoleDeleteReason)
 	gm.GET("/throttled", s.consoleThrottled)
 	gm.GET("/games", s.consoleGames)
 	gm.GET("/games/:id", s.consoleGameDetail)
@@ -291,6 +297,20 @@ func (s *Server) consoleUserDetail(c *gin.Context) {
 		}
 		view.MoveChart = adminconsole.MoveDurationChart(cps)
 	}
+	if susp, blocked, err := s.accounts.CurrentSuspension(ctx, id); err == nil && blocked {
+		view.Suspension = adminconsole.SuspensionView{
+			Blocked: true, Permanent: susp.Permanent(), BlockedAt: fmtTime(susp.BlockedAt),
+			ReasonEn: susp.ReasonEn, ReasonRu: susp.ReasonRu,
+		}
+		if susp.BlockedUntil != nil {
+			view.Suspension.Until = fmtTime(*susp.BlockedUntil)
+		}
+	}
+	if reasons, err := s.accounts.ListReasons(ctx); err == nil {
+		for _, r := range reasons {
+			view.Reasons = append(view.Reasons, adminconsole.ReasonOption{ID: r.ID.String(), TextEn: r.TextEn, TextRu: r.TextRu})
+		}
+	}
 	s.renderConsole(c, "user_detail", "users", acc.DisplayName, view)
 }
 
@@ -754,6 +774,157 @@ func (s *Server) consoleClearHighRateFlag(c *gin.Context) {
 	s.renderConsoleMessage(c, "Cleared", "high-rate flag cleared", "/_gm/users/"+id.String())
 }
 
+// consoleBlockUser manually blocks an account: it records the suspension (permanent or until a
+// parsed deadline, snapshotting the chosen reason's en/ru text) and forfeits the player's active
+// games, removing them from matchmaking. The block takes effect on the player's next request.
+func (s *Server) consoleBlockUser(c *gin.Context) {
+	ctx := c.Request.Context()
+	id, ok := s.consoleUUID(c, "/_gm/users")
+	if !ok {
+		return
+	}
+	back := "/_gm/users/" + id.String()
+	until, ok := parseSuspendUntil(trimForm(c, "duration"), trimForm(c, "until"))
+	if !ok {
+		s.renderConsoleMessage(c, "Invalid duration", "pick a preset or a future custom date/time (UTC)", back)
+		return
+	}
+	var reasonEn, reasonRu string
+	var reasonID *uuid.UUID
+	if rid := trimForm(c, "reason"); rid != "" {
+		parsed, err := uuid.Parse(rid)
+		if err != nil {
+			s.renderConsoleMessage(c, "Invalid reason", "the selected reason is not valid", back)
+			return
+		}
+		reason, err := s.accounts.GetReason(ctx, parsed)
+		if err != nil {
+			s.consoleError(c, err)
+			return
+		}
+		reasonEn, reasonRu, reasonID = reason.TextEn, reason.TextRu, &reason.ID
+	}
+	if _, err := s.accounts.Suspend(ctx, id, until, reasonEn, reasonRu, reasonID); err != nil {
+		s.consoleError(c, err)
+		return
+	}
+	forfeited, err := s.games.ForfeitAllForAccount(ctx, id)
+	if err != nil {
+		s.consoleError(c, err)
+		return
+	}
+	s.renderConsoleMessage(c, "Blocked", fmt.Sprintf("account blocked; %d game(s) forfeited", forfeited), back)
+}
+
+// consoleUnblockUser lifts an account's block (temporary or permanent). Games already lost at
+// block time are not restored.
+func (s *Server) consoleUnblockUser(c *gin.Context) {
+	id, ok := s.consoleUUID(c, "/_gm/users")
+	if !ok {
+		return
+	}
+	if err := s.accounts.LiftSuspension(c.Request.Context(), id); err != nil {
+		s.consoleError(c, err)
+		return
+	}
+	s.renderConsoleMessage(c, "Unblocked", "the block was lifted; lost games are not restored", "/_gm/users/"+id.String())
+}
+
+// parseSuspendUntil maps the block form's duration choice to an expiry instant, returning nil for
+// a permanent block. A custom choice parses the datetime-local value as UTC and must be in the
+// future. It reports false for an unrecognised choice or an invalid/past custom date.
+func parseSuspendUntil(choice, custom string) (*time.Time, bool) {
+	now := time.Now().UTC()
+	switch choice {
+	case "permanent":
+		return nil, true
+	case "1d":
+		t := now.AddDate(0, 0, 1)
+		return &t, true
+	case "3d":
+		t := now.AddDate(0, 0, 3)
+		return &t, true
+	case "1w":
+		t := now.AddDate(0, 0, 7)
+		return &t, true
+	case "1m":
+		t := now.AddDate(0, 1, 0)
+		return &t, true
+	case "custom":
+		for _, layout := range []string{"2006-01-02T15:04", "2006-01-02T15:04:05"} {
+			if t, err := time.Parse(layout, custom); err == nil {
+				if !t.After(now) {
+					return nil, false
+				}
+				return &t, true
+			}
+		}
+		return nil, false
+	default:
+		return nil, false
+	}
+}
+
+// consoleReasons renders the operator-editable suspension-reason picklist.
+func (s *Server) consoleReasons(c *gin.Context) {
+	reasons, err := s.accounts.ListReasons(c.Request.Context())
+	if err != nil {
+		s.consoleError(c, err)
+		return
+	}
+	var view adminconsole.ReasonsView
+	for _, r := range reasons {
+		view.Items = append(view.Items, adminconsole.ReasonRow{ID: r.ID.String(), TextEn: r.TextEn, TextRu: r.TextRu, CreatedAt: fmtTime(r.CreatedAt)})
+	}
+	s.renderConsole(c, "reasons", "reasons", "Reasons", view)
+}
+
+// consoleCreateReason adds a suspension-reason picklist entry; both languages are required.
+func (s *Server) consoleCreateReason(c *gin.Context) {
+	en, ru := trimForm(c, "text_en"), trimForm(c, "text_ru")
+	if en == "" || ru == "" {
+		s.renderConsoleMessage(c, "Nothing added", "both English and Russian text are required", "/_gm/reasons")
+		return
+	}
+	if _, err := s.accounts.CreateReason(c.Request.Context(), en, ru); err != nil {
+		s.consoleError(c, err)
+		return
+	}
+	s.renderConsoleMessage(c, "Added", "reason added", "/_gm/reasons")
+}
+
+// consoleUpdateReason rewrites a reason's English and Russian text. Existing blocks keep their
+// snapshot, so the change only affects future blocks.
+func (s *Server) consoleUpdateReason(c *gin.Context) {
+	id, ok := s.consoleUUID(c, "/_gm/reasons")
+	if !ok {
+		return
+	}
+	en, ru := trimForm(c, "text_en"), trimForm(c, "text_ru")
+	if en == "" || ru == "" {
+		s.renderConsoleMessage(c, "Not changed", "both English and Russian text are required", "/_gm/reasons")
+		return
+	}
+	if _, err := s.accounts.UpdateReason(c.Request.Context(), id, en, ru); err != nil {
+		s.consoleError(c, err)
+		return
+	}
+	s.renderConsoleMessage(c, "Updated", "reason updated", "/_gm/reasons")
+}
+
+// consoleDeleteReason removes a reason from the picklist. Past blocks keep their text snapshot.
+func (s *Server) consoleDeleteReason(c *gin.Context) {
+	id, ok := s.consoleUUID(c, "/_gm/reasons")
+	if !ok {
+		return
+	}
+	if err := s.accounts.DeleteReason(c.Request.Context(), id); err != nil {
+		s.consoleError(c, err)
+		return
+	}
+	s.renderConsoleMessage(c, "Deleted", "reason deleted", "/_gm/reasons")
+}
+
 // variantVersions builds the per-variant resident-version summary from the registry.
 func (s *Server) variantVersions() []adminconsole.VariantVersions {
 	out := make([]adminconsole.VariantVersions, 0, len(engine.Variants()))
diff --git a/backend/internal/server/middleware.go b/backend/internal/server/middleware.go
index f1a1e84..56a5e41 100644
--- a/backend/internal/server/middleware.go
+++ b/backend/internal/server/middleware.go
@@ -77,3 +77,40 @@ func sameOrigin(r *http.Request) bool {
 	}
 	return false
 }
+
+// codeAccountBlocked is the stable error code the suspension gate returns for a blocked account.
+// It threads through the gateway unchanged as the Execute result_code, so the UI can detect the
+// block from any call and switch to the terminal blocked screen.
+const codeAccountBlocked = "account_blocked"
+
+// blockStatusPath is the one /api/v1/user route exempt from the suspension gate: a blocked client
+// must still reach it to fetch the block's expiry and reason for the blocked screen.
+const blockStatusPath = "/api/v1/user/block-status"
+
+// requireNotSuspended returns middleware that rejects a blocked account's requests with 403 and
+// code "account_blocked", so the UI can detect an active block from any call. The block-status
+// probe is exempt. It is a no-op when the account store is not wired. It runs after RequireUserID
+// (which has already placed the account id in the context).
+func (s *Server) requireNotSuspended() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if s.accounts == nil || c.FullPath() == blockStatusPath {
+			c.Next()
+			return
+		}
+		id, ok := userID(c)
+		if !ok {
+			c.Next() // RequireUserID runs first and has already rejected a missing id
+			return
+		}
+		_, blocked, err := s.accounts.CurrentSuspension(c.Request.Context(), id)
+		if err != nil {
+			s.abortErr(c, err)
+			return
+		}
+		if blocked {
+			c.AbortWithStatusJSON(http.StatusForbidden, errorResponse{Error: errorBody{Code: codeAccountBlocked, Message: "account is blocked"}})
+			return
+		}
+		c.Next()
+	}
+}
diff --git a/backend/internal/server/server.go b/backend/internal/server/server.go
index 640a9dc..5c681be 100644
--- a/backend/internal/server/server.go
+++ b/backend/internal/server/server.go
@@ -185,6 +185,9 @@ func (s *Server) registerAPIGroups(engine *gin.Engine) {
 	s.public = v1.Group("/public")
 	s.user = v1.Group("/user")
 	s.user.Use(RequireUserID())
+	// The suspension gate runs after identity is established: a blocked account is refused on
+	// every user route (except the block-status probe) so the UI can show the blocked screen.
+	s.user.Use(s.requireNotSuspended())
 	s.internal = v1.Group("/internal")
 }
 
diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index a4e26f3..ed0d524 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -700,6 +700,7 @@ promotions) is future work and would deliver short markdown messages (text + lin
 | Session minting; email-code / guest validation | gateway (with backend) |
 | Session → `user_id` resolution, `X-User-ID` injection | gateway |
 | Authorisation, ownership, state transitions | backend (`X-User-ID` is the sole identity input) |
+| Manual account block (suspension) | backend: a per-request gate refuses a blocked account on every `/api/v1/user/*` route except the block-status probe with **403 `account_blocked`**; the operator blocks/unblocks from the admin console (§11) |
 | Admin authentication | a single Basic-Auth gate on `/_gm/*`, forwarded **verbatim** to the backend's server-rendered admin console (and, in the deployed contour, routing `/_gm/grafana/*` to Grafana). In the deploy the **caddy** owns this gate (§13); a local non-caddy run uses the gateway's own `GATEWAY_ADMIN_*` proxy, which the per-IP admin limiter class guards ahead of its Basic-Auth — the caddy-fronted path has no limiter (stock caddy), an accepted gap. The backend trusts the proxy (no admin principal) and guards its state-changing POSTs with a **same-origin** check — the console's CSRF defence. No operator identity is tracked |
 | backend ↔ gateway ↔ connector trust | the network (only gateway may reach backend; the connector serves unauthenticated gRPC on the internal segment) |
 
@@ -707,6 +708,25 @@ This is an explicit, accepted MVP risk: compromise of the gateway↔backend
 network segment defeats backend authentication. Mitigated by network isolation;
 mutual auth is a future hardening step.
 
+**Manual account block (suspension).** Beyond the soft, reversible high-rate flag (§11, never a
+gate), an operator can hard-block an account from the admin console — permanently or until a
+date, with an optional reason chosen from an editable en+ru picklist. A block is a row in
+`account_suspensions` (the chosen reason's text is **snapshotted**, so editing or deleting a
+picklist entry never changes what an already-blocked player is shown); it is named *suspension*
+to stay distinct from the peer-to-peer `blocks` table. Enforcement is a backend middleware gate
+after `X-User-ID`: every `/api/v1/user/*` route except the block-status probe refuses a blocked
+account with **HTTP 403 + code `account_blocked`**, which threads through the gateway unchanged as
+the Execute `result_code`, so the UI detects the block from *any* call and replaces every screen
+with a terminal "blocked" screen, stopping all push/poll. The one exempt route,
+`GET /api/v1/user/block-status`, returns the expiry and the reason resolved to the account's
+language so the blocked client can render the message. Sessions are **not** revoked on block (a
+revoked token would fail session resolution at the gateway *before* the gate, sending the UI to
+login instead of the blocked screen). A block instantly **forfeits** every active game the player
+is in (the opponent wins, exactly as a resignation — the engine resigns off-turn) and cancels
+their open matchmaking games; a temporary block lapses automatically once its expiry passes (no
+sweeper — the gate recomputes against `now`). No operator identity is recorded (shared
+Basic-Auth).
+
 **Short numeric codes** (email confirm-codes and friend codes) are stored
 only as SHA-256 hashes and are short-lived and single-use. The unauthenticated
 email path carries a tight per-IP sub-limit (5 / 10 min); the **friend-code redeem**
diff --git a/docs/FUNCTIONAL.md b/docs/FUNCTIONAL.md
index 1637271..cd9475c 100644
--- a/docs/FUNCTIONAL.md
+++ b/docs/FUNCTIONAL.md
@@ -208,3 +208,15 @@ account sustaining rejections past a tunable threshold is flagged automatically
 the marker is reversible, shown as a badge in the user list and on the user card, and
 **never blocks play**; the operator reviews and clears it from the user card. There is
 no automatic ban.
+
+The console also lets an operator **manually block** an account — the hard counterpart to the
+soft high-rate flag. From the user card the operator blocks the account **permanently** or
+**until a date** (presets: 1 day / 3 days / 1 week / 1 month, or a custom date in UTC), optionally
+citing a **reason** chosen from an editable **en+ru picklist** managed on a **Reasons** page; the
+blocked player sees the reason in their own language. Blocking instantly **forfeits** the player's
+active games (each opponent wins, as if the player resigned) and removes them from matchmaking. A
+blocked player — on opening the app or on any action — is shown a terminal screen: *"Your account
+is blocked"* (permanent) or *"…blocked until &lt;date, time&gt;"* (temporary, in their timezone),
+plus the reason when one was given, and the app stops all background traffic with the server. A
+temporary block lifts itself when it expires; the operator can also **unblock** from the user card
+at any time (games already lost stay lost).
diff --git a/docs/FUNCTIONAL_ru.md b/docs/FUNCTIONAL_ru.md
index 3d547d1..1ecdbad 100644
--- a/docs/FUNCTIONAL_ru.md
+++ b/docs/FUNCTIONAL_ru.md
@@ -213,3 +213,16 @@ Telegram-identity) или **отправить пост в игровой кан
 автоматически — маркер обратим, виден бейджем в списке пользователей и на карточке
 аккаунта и **никогда не блокирует игру**; оператор рассматривает и снимает его с
 карточки пользователя. Автоматического бана нет.
+
+Консоль также позволяет оператору **вручную заблокировать** аккаунт — жёсткий аналог мягкого
+high-rate флага. С карточки пользователя оператор блокирует аккаунт **навсегда** или **до даты**
+(пресеты: 1 день / 3 дня / 1 неделя / 1 месяц либо произвольная дата в UTC), при желании указав
+**причину** из редактируемого **списка en+ru**, который ведётся на странице **Reasons**;
+заблокированный игрок видит причину на своём языке. Блокировка мгновенно засчитывает **поражение**
+во всех активных партиях игрока (каждый соперник побеждает, как при сдаче) и убирает его из
+матчмейкинга. Заблокированный игрок — при открытии приложения или любом действии — видит
+терминальный экран: *«Ваша учётная запись заблокирована»* (постоянная) или *«…заблокирована до
+&lt;дата, время&gt;»* (временная, в его часовом поясе), плюс причину, если она была указана, и
+приложение прекращает любое фоновое общение с сервером. Временная блокировка снимается сама по
+истечении срока; оператор также может **разблокировать** с карточки пользователя в любой момент
+(уже проигранные партии не возвращаются).
diff --git a/gateway/internal/backendclient/api.go b/gateway/internal/backendclient/api.go
index 91e421e..b6eeb25 100644
--- a/gateway/internal/backendclient/api.go
+++ b/gateway/internal/backendclient/api.go
@@ -224,6 +224,25 @@ func (c *Client) Profile(ctx context.Context, userID string) (ProfileResp, error
 	return out, err
 }
 
+// BlockStatusResp is the caller's current manual-block state. Until is an RFC3339 UTC instant for
+// a temporary block, empty for a permanent one or when not blocked; Reason is resolved to the
+// account's language, empty when none was cited.
+type BlockStatusResp struct {
+	Blocked   bool   `json:"blocked"`
+	Permanent bool   `json:"permanent"`
+	Until     string `json:"until"`
+	Reason    string `json:"reason"`
+}
+
+// BlockStatus fetches the caller's current block. It is the one user endpoint a blocked account
+// can still reach (the backend's suspension gate exempts it), so the UI can render the blocked
+// screen.
+func (c *Client) BlockStatus(ctx context.Context, userID string) (BlockStatusResp, error) {
+	var out BlockStatusResp
+	err := c.do(ctx, http.MethodGet, "/api/v1/user/block-status", userID, "", nil, &out)
+	return out, err
+}
+
 // SubmitPlay commits a placement on the player's turn. The tiles are addressed by alphabet
 // index.
 func (c *Client) SubmitPlay(ctx context.Context, userID, gameID string, tiles []PlayTileJSON) (MoveResultResp, error) {
diff --git a/gateway/internal/transcode/encode.go b/gateway/internal/transcode/encode.go
index ae99486..95f5de2 100644
--- a/gateway/internal/transcode/encode.go
+++ b/gateway/internal/transcode/encode.go
@@ -81,6 +81,20 @@ func encodeProfile(p backendclient.ProfileResp) []byte {
 	return b.FinishedBytes()
 }
 
+// encodeBlockStatus builds a BlockStatus payload.
+func encodeBlockStatus(s backendclient.BlockStatusResp) []byte {
+	b := flatbuffers.NewBuilder(128)
+	until := b.CreateString(s.Until)
+	reason := b.CreateString(s.Reason)
+	fb.BlockStatusStart(b)
+	fb.BlockStatusAddBlocked(b, s.Blocked)
+	fb.BlockStatusAddPermanent(b, s.Permanent)
+	fb.BlockStatusAddUntil(b, until)
+	fb.BlockStatusAddReason(b, reason)
+	b.Finish(fb.BlockStatusEnd(b))
+	return b.FinishedBytes()
+}
+
 // encodeLinkResult builds a LinkResult payload. A switched-session token
 // (a guest initiator whose durable counterpart won) is carried as a nested Session
 // for the client to adopt; it is omitted otherwise. supportedLangs is the variant
diff --git a/gateway/internal/transcode/transcode.go b/gateway/internal/transcode/transcode.go
index 9cfd7bc..035cccc 100644
--- a/gateway/internal/transcode/transcode.go
+++ b/gateway/internal/transcode/transcode.go
@@ -22,6 +22,7 @@ const (
 	MsgAuthEmailReq   = "auth.email.request"
 	MsgAuthEmailLogin = "auth.email.login"
 	MsgProfileGet     = "profile.get"
+	MsgBlockStatus    = "account.block_status"
 	MsgGameSubmitPlay = "game.submit_play"
 	MsgGameState      = "game.state"
 	MsgLobbyEnqueue   = "lobby.enqueue"
@@ -95,6 +96,7 @@ func NewRegistry(backend *backendclient.Client, tg TelegramValidator, defaultLan
 	r.ops[MsgAuthEmailReq] = Op{Handler: authEmailRequestHandler(backend), Email: true}
 	r.ops[MsgAuthEmailLogin] = Op{Handler: authEmailLoginHandler(backend, defaultLanguages), Email: true}
 	r.ops[MsgProfileGet] = Op{Handler: profileHandler(backend), Auth: true}
+	r.ops[MsgBlockStatus] = Op{Handler: blockStatusHandler(backend), Auth: true}
 	r.ops[MsgGameSubmitPlay] = Op{Handler: submitPlayHandler(backend), Auth: true}
 	r.ops[MsgGameState] = Op{Handler: gameStateHandler(backend), Auth: true}
 	r.ops[MsgLobbyEnqueue] = Op{Handler: enqueueHandler(backend), Auth: true}
@@ -199,6 +201,16 @@ func profileHandler(backend *backendclient.Client) Handler {
 	}
 }
 
+func blockStatusHandler(backend *backendclient.Client) Handler {
+	return func(ctx context.Context, req Request) ([]byte, error) {
+		bs, err := backend.BlockStatus(ctx, req.UserID)
+		if err != nil {
+			return nil, err
+		}
+		return encodeBlockStatus(bs), nil
+	}
+}
+
 func submitPlayHandler(backend *backendclient.Client) Handler {
 	return func(ctx context.Context, req Request) ([]byte, error) {
 		in := fb.GetRootAsSubmitPlayRequest(req.Payload, 0)
diff --git a/gateway/internal/transcode/transcode_block_test.go b/gateway/internal/transcode/transcode_block_test.go
new file mode 100644
index 0000000..8b7bd70
--- /dev/null
+++ b/gateway/internal/transcode/transcode_block_test.go
@@ -0,0 +1,64 @@
+package transcode_test
+
+import (
+	"context"
+	"net/http"
+	"testing"
+
+	"scrabble/gateway/internal/transcode"
+	fb "scrabble/pkg/fbs/scrabblefb"
+)
+
+// TestBlockStatusRoundTrip checks the account.block_status op forwards to the backend block-status
+// endpoint and encodes its JSON into the BlockStatus FlatBuffer.
+func TestBlockStatusRoundTrip(t *testing.T) {
+	backend, cleanup := fakeBackend(t, func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/api/v1/user/block-status" {
+			t.Errorf("path = %q, want /api/v1/user/block-status", r.URL.Path)
+		}
+		_, _ = w.Write([]byte(`{"blocked":true,"permanent":false,"until":"2026-07-01T12:00:00Z","reason":"Спам"}`))
+	})
+	defer cleanup()
+
+	reg := transcode.NewRegistry(backend, nil)
+	op, ok := reg.Lookup(transcode.MsgBlockStatus)
+	if !ok {
+		t.Fatal("account.block_status not registered")
+	}
+	payload, err := op.Handler(context.Background(), transcode.Request{UserID: "u-1"})
+	if err != nil {
+		t.Fatalf("handler: %v", err)
+	}
+	bs := fb.GetRootAsBlockStatus(payload, 0)
+	if !bs.Blocked() || bs.Permanent() {
+		t.Fatalf("blocked=%v permanent=%v, want true/false", bs.Blocked(), bs.Permanent())
+	}
+	if string(bs.Until()) != "2026-07-01T12:00:00Z" {
+		t.Errorf("until = %q, want the forwarded instant", bs.Until())
+	}
+	if string(bs.Reason()) != "Спам" {
+		t.Errorf("reason = %q, want Спам", bs.Reason())
+	}
+}
+
+// TestBlockedBackendSurfacesDomainCode checks that a backend 403 with code account_blocked (the
+// suspension gate) surfaces as a domain code, which the Execute layer turns into the envelope
+// result_code the UI keys off.
+func TestBlockedBackendSurfacesDomainCode(t *testing.T) {
+	backend, cleanup := fakeBackend(t, func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusForbidden)
+		_, _ = w.Write([]byte(`{"error":{"code":"account_blocked","message":"account is blocked"}}`))
+	})
+	defer cleanup()
+
+	reg := transcode.NewRegistry(backend, nil)
+	op, _ := reg.Lookup(transcode.MsgProfileGet) // any gated op hits the same gate
+	_, err := op.Handler(context.Background(), transcode.Request{UserID: "u-1"})
+	if err == nil {
+		t.Fatal("expected an error from a blocked backend response")
+	}
+	code, ok := transcode.DomainCode(err)
+	if !ok || code != "account_blocked" {
+		t.Fatalf("DomainCode = (%q, %v), want (account_blocked, true)", code, ok)
+	}
+}
diff --git a/pkg/fbs/scrabble.fbs b/pkg/fbs/scrabble.fbs
index e786445..b45f2c5 100644
--- a/pkg/fbs/scrabble.fbs
+++ b/pkg/fbs/scrabble.fbs
@@ -150,6 +150,18 @@ table Profile {
   notifications_in_app_only:bool = true;
 }
 
+// BlockStatus reports the caller's current manual block. The UI fetches it after any operation
+// returns the "account_blocked" result code, then replaces every screen with the terminal blocked
+// screen and stops all push/poll. permanent is false for a temporary block; until is an RFC3339
+// UTC instant for a temporary block and empty for a permanent one; reason is the operator-set text
+// resolved to the account's language, empty when none was cited.
+table BlockStatus {
+  blocked:bool;
+  permanent:bool;
+  until:string;
+  reason:string;
+}
+
 // --- game (authenticated) ---
 
 // SubmitPlayRequest places tiles on the player's turn; the backend infers the play's
diff --git a/pkg/fbs/scrabblefb/BlockStatus.go b/pkg/fbs/scrabblefb/BlockStatus.go
new file mode 100644
index 0000000..48ea4bf
--- /dev/null
+++ b/pkg/fbs/scrabblefb/BlockStatus.go
@@ -0,0 +1,101 @@
+// Code generated by the FlatBuffers compiler. DO NOT EDIT.
+
+package scrabblefb
+
+import (
+	flatbuffers "github.com/google/flatbuffers/go"
+)
+
+type BlockStatus struct {
+	_tab flatbuffers.Table
+}
+
+func GetRootAsBlockStatus(buf []byte, offset flatbuffers.UOffsetT) *BlockStatus {
+	n := flatbuffers.GetUOffsetT(buf[offset:])
+	x := &BlockStatus{}
+	x.Init(buf, n+offset)
+	return x
+}
+
+func FinishBlockStatusBuffer(builder *flatbuffers.Builder, offset flatbuffers.UOffsetT) {
+	builder.Finish(offset)
+}
+
+func GetSizePrefixedRootAsBlockStatus(buf []byte, offset flatbuffers.UOffsetT) *BlockStatus {
+	n := flatbuffers.GetUOffsetT(buf[offset+flatbuffers.SizeUint32:])
+	x := &BlockStatus{}
+	x.Init(buf, n+offset+flatbuffers.SizeUint32)
+	return x
+}
+
+func FinishSizePrefixedBlockStatusBuffer(builder *flatbuffers.Builder, offset flatbuffers.UOffsetT) {
+	builder.FinishSizePrefixed(offset)
+}
+
+func (rcv *BlockStatus) Init(buf []byte, i flatbuffers.UOffsetT) {
+	rcv._tab.Bytes = buf
+	rcv._tab.Pos = i
+}
+
+func (rcv *BlockStatus) Table() flatbuffers.Table {
+	return rcv._tab
+}
+
+func (rcv *BlockStatus) Blocked() bool {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(4))
+	if o != 0 {
+		return rcv._tab.GetBool(o + rcv._tab.Pos)
+	}
+	return false
+}
+
+func (rcv *BlockStatus) MutateBlocked(n bool) bool {
+	return rcv._tab.MutateBoolSlot(4, n)
+}
+
+func (rcv *BlockStatus) Permanent() bool {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(6))
+	if o != 0 {
+		return rcv._tab.GetBool(o + rcv._tab.Pos)
+	}
+	return false
+}
+
+func (rcv *BlockStatus) MutatePermanent(n bool) bool {
+	return rcv._tab.MutateBoolSlot(6, n)
+}
+
+func (rcv *BlockStatus) Until() []byte {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(8))
+	if o != 0 {
+		return rcv._tab.ByteVector(o + rcv._tab.Pos)
+	}
+	return nil
+}
+
+func (rcv *BlockStatus) Reason() []byte {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(10))
+	if o != 0 {
+		return rcv._tab.ByteVector(o + rcv._tab.Pos)
+	}
+	return nil
+}
+
+func BlockStatusStart(builder *flatbuffers.Builder) {
+	builder.StartObject(4)
+}
+func BlockStatusAddBlocked(builder *flatbuffers.Builder, blocked bool) {
+	builder.PrependBoolSlot(0, blocked, false)
+}
+func BlockStatusAddPermanent(builder *flatbuffers.Builder, permanent bool) {
+	builder.PrependBoolSlot(1, permanent, false)
+}
+func BlockStatusAddUntil(builder *flatbuffers.Builder, until flatbuffers.UOffsetT) {
+	builder.PrependUOffsetTSlot(2, flatbuffers.UOffsetT(until), 0)
+}
+func BlockStatusAddReason(builder *flatbuffers.Builder, reason flatbuffers.UOffsetT) {
+	builder.PrependUOffsetTSlot(3, flatbuffers.UOffsetT(reason), 0)
+}
+func BlockStatusEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
+	return builder.EndObject()
+}
diff --git a/ui/e2e/blocked.spec.ts b/ui/e2e/blocked.spec.ts
new file mode 100644
index 0000000..37836d4
--- /dev/null
+++ b/ui/e2e/blocked.spec.ts
@@ -0,0 +1,42 @@
+import { expect, test } from './fixtures';
+
+// The terminal blocked screen replaces every screen. The mock never blocks of its own accord, so
+// the e2e drives it through the mock-mode __block seam (lib/app.svelte.ts), mirroring what
+// enterBlocked does when any call returns the account_blocked code.
+
+test('a temporary block shows the dated message and reason, replacing the lobby', async ({
+  page,
+}) => {
+  await page.goto('/');
+  await page.getByRole('button', { name: /guest/i }).click();
+  await expect(page.getByText('Your turn')).toBeVisible(); // reached the lobby
+
+  await page.evaluate(() =>
+    (window as unknown as { __block: (b: unknown) => void }).__block({
+      permanent: false,
+      until: '2026-07-01T12:00:00Z',
+      reason: 'Спам',
+    }),
+  );
+
+  const blocked = page.locator('.blocked');
+  await expect(blocked).toBeVisible();
+  await expect(blocked).toContainText('2026'); // the expiry rendered in the user's locale/timezone
+  await expect(blocked).toContainText('Спам'); // the operator reason
+  // The lobby is gone: the blocked screen overlays every screen, stopping its push/poll.
+  await expect(page.getByText('Your turn')).toHaveCount(0);
+});
+
+test('a permanent block shows the permanent message with no date', async ({ page }) => {
+  await page.goto('/');
+  await page.getByRole('button', { name: /guest/i }).click();
+  await expect(page.getByText('Your turn')).toBeVisible();
+
+  await page.evaluate(() =>
+    (window as unknown as { __block: (b: unknown) => void }).__block({ permanent: true }),
+  );
+
+  const blocked = page.locator('.blocked');
+  await expect(blocked).toBeVisible();
+  await expect(blocked).not.toContainText('2026');
+});
diff --git a/ui/src/App.svelte b/ui/src/App.svelte
index 9e42fb6..7c6348e 100644
--- a/ui/src/App.svelte
+++ b/ui/src/App.svelte
@@ -13,6 +13,7 @@
   import Stats from './screens/Stats.svelte';
   import Game from './game/Game.svelte';
   import CommsHub from './game/CommsHub.svelte';
+  import Blocked from './screens/Blocked.svelte';
 
   onMount(() => {
     void bootstrap();
@@ -68,6 +69,8 @@
 
 {#if !app.ready}
   <div class="splash">{t('common.loading')}</div>
+{:else if app.blocked}
+  <Blocked />
 {:else}
   <div class="router">
     {#key routeKey}
diff --git a/ui/src/gen/fbs/scrabblefb.ts b/ui/src/gen/fbs/scrabblefb.ts
index 198e0d0..8bca894 100644
--- a/ui/src/gen/fbs/scrabblefb.ts
+++ b/ui/src/gen/fbs/scrabblefb.ts
@@ -4,6 +4,7 @@ export { AccountRef } from './scrabblefb/account-ref.js';
 export { Ack } from './scrabblefb/ack.js';
 export { AlphabetEntry } from './scrabblefb/alphabet-entry.js';
 export { BlockList } from './scrabblefb/block-list.js';
+export { BlockStatus } from './scrabblefb/block-status.js';
 export { ChatList } from './scrabblefb/chat-list.js';
 export { ChatMessage } from './scrabblefb/chat-message.js';
 export { ChatPostRequest } from './scrabblefb/chat-post-request.js';
diff --git a/ui/src/gen/fbs/scrabblefb/block-status.ts b/ui/src/gen/fbs/scrabblefb/block-status.ts
new file mode 100644
index 0000000..d955cde
--- /dev/null
+++ b/ui/src/gen/fbs/scrabblefb/block-status.ts
@@ -0,0 +1,80 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+export class BlockStatus {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):BlockStatus {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsBlockStatus(bb:flatbuffers.ByteBuffer, obj?:BlockStatus):BlockStatus {
+  return (obj || new BlockStatus()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsBlockStatus(bb:flatbuffers.ByteBuffer, obj?:BlockStatus):BlockStatus {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new BlockStatus()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+blocked():boolean {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? !!this.bb!.readInt8(this.bb_pos + offset) : false;
+}
+
+permanent():boolean {
+  const offset = this.bb!.__offset(this.bb_pos, 6);
+  return offset ? !!this.bb!.readInt8(this.bb_pos + offset) : false;
+}
+
+until():string|null
+until(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
+until(optionalEncoding?:any):string|Uint8Array|null {
+  const offset = this.bb!.__offset(this.bb_pos, 8);
+  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
+}
+
+reason():string|null
+reason(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
+reason(optionalEncoding?:any):string|Uint8Array|null {
+  const offset = this.bb!.__offset(this.bb_pos, 10);
+  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
+}
+
+static startBlockStatus(builder:flatbuffers.Builder) {
+  builder.startObject(4);
+}
+
+static addBlocked(builder:flatbuffers.Builder, blocked:boolean) {
+  builder.addFieldInt8(0, +blocked, +false);
+}
+
+static addPermanent(builder:flatbuffers.Builder, permanent:boolean) {
+  builder.addFieldInt8(1, +permanent, +false);
+}
+
+static addUntil(builder:flatbuffers.Builder, untilOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(2, untilOffset, 0);
+}
+
+static addReason(builder:flatbuffers.Builder, reasonOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(3, reasonOffset, 0);
+}
+
+static endBlockStatus(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createBlockStatus(builder:flatbuffers.Builder, blocked:boolean, permanent:boolean, untilOffset:flatbuffers.Offset, reasonOffset:flatbuffers.Offset):flatbuffers.Offset {
+  BlockStatus.startBlockStatus(builder);
+  BlockStatus.addBlocked(builder, blocked);
+  BlockStatus.addPermanent(builder, permanent);
+  BlockStatus.addUntil(builder, untilOffset);
+  BlockStatus.addReason(builder, reasonOffset);
+  return BlockStatus.endBlockStatus(builder);
+}
+}
diff --git a/ui/src/lib/app.svelte.ts b/ui/src/lib/app.svelte.ts
index 4994b71..a53ad61 100644
--- a/ui/src/lib/app.svelte.ts
+++ b/ui/src/lib/app.svelte.ts
@@ -3,7 +3,7 @@
 // gateway calls funnel through here so errors map to one user-facing toast and an
 // expired session logs out.
 
-import type { LinkResult, Profile, PushEvent, Session } from './model';
+import type { BlockStatus, LinkResult, Profile, PushEvent, Session } from './model';
 import { gateway } from './gateway';
 import { GatewayError } from './client';
 import { navigate, router } from './router.svelte';
@@ -43,6 +43,9 @@ export const app = $state<{
   streamAlive: boolean;
   session: Session | null;
   profile: Profile | null;
+  /** The caller's active manual block, or null. When set, App.svelte replaces every screen with
+   *  the terminal blocked screen and all push/poll is stopped. */
+  blocked: BlockStatus | null;
   toast: Toast | null;
   lastEvent: PushEvent | null;
   theme: ThemePref;
@@ -65,6 +68,7 @@ export const app = $state<{
   streamAlive: false,
   session: null,
   profile: null,
+  blocked: null,
   toast: null,
   lastEvent: null,
   theme: 'auto',
@@ -140,11 +144,39 @@ export function handleError(err: unknown): void {
     void logout();
     return;
   }
+  if (code === 'account_blocked') {
+    void enterBlocked();
+    return;
+  }
   if (isConnectionCode(code) || !connection.online) return;
   telegramHaptic('error');
   showToast(t(code ? errorKey(code) : 'error.generic'), 'error');
 }
 
+/**
+ * enterBlocked switches the app to the terminal blocked screen and stops all push/poll. It is
+ * triggered whenever any call reports the "account_blocked" code. It flips the screen
+ * synchronously (a generic placeholder), then fetches the block's expiry and reason — the one
+ * endpoint a blocked client may still reach — to render the precise message. If that fetch reports
+ * the block was already lifted (a race), it recovers: clears the blocked screen and reopens the
+ * stream.
+ */
+export async function enterBlocked(): Promise<void> {
+  closeStream(); // stop the live stream; the blocked screen makes no further calls
+  app.blocked ??= { blocked: true, permanent: true, until: '', reason: '' };
+  try {
+    const s = await gateway.blockStatus();
+    if (s.blocked) {
+      app.blocked = s;
+    } else {
+      app.blocked = null;
+      if (app.session) openStream();
+    }
+  } catch {
+    // Keep the placeholder blocked screen even if the details cannot be fetched.
+  }
+}
+
 /**
  * viewingGame reports whether the game board for the given game id is the current route. That screen
  * maintains its own cache from live events, so the global stream handler must not also advance it (a
@@ -284,6 +316,8 @@ async function adoptSession(s: Session): Promise<void> {
   } catch (err) {
     handleError(err);
   }
+  // A blocked account stays on the blocked screen: no live stream, no notification poll.
+  if (app.blocked) return;
   openStream();
   void refreshNotifications();
 }
@@ -392,7 +426,8 @@ export async function bootstrap(): Promise<void> {
     telegramDisableVerticalSwipes();
     try {
       await adoptSession(await gateway.authTelegram(launch.initData));
-      await routeStartParam(launch.startParam);
+      // A blocked account skips deep-link routing — the blocked screen overlays every route.
+      if (!app.blocked) await routeStartParam(launch.startParam);
     } catch (err) {
       handleError(err);
       navigate('/login');
@@ -568,4 +603,10 @@ if (import.meta.env.MODE === 'mock' && typeof window !== 'undefined') {
     drop: closeStream,
     restore: openStream,
   };
+  // Drive the terminal blocked screen from the e2e (the mock never blocks of its own accord). It
+  // mirrors enterBlocked: flip the screen and stop the live stream.
+  (window as unknown as { __block?: (b?: Partial<BlockStatus>) => void }).__block = (b) => {
+    closeStream();
+    app.blocked = { blocked: true, permanent: true, until: '', reason: '', ...b };
+  };
 }
diff --git a/ui/src/lib/blocked.test.ts b/ui/src/lib/blocked.test.ts
new file mode 100644
index 0000000..dd51004
--- /dev/null
+++ b/ui/src/lib/blocked.test.ts
@@ -0,0 +1,27 @@
+import { describe, expect, it } from 'vitest';
+import { formatBlockUntil } from './blocked';
+
+describe('formatBlockUntil', () => {
+  const instant = '2026-07-01T12:00:00Z';
+
+  it('formats a valid instant in the given timezone', () => {
+    const out = formatBlockUntil(instant, 'en', 'UTC');
+    expect(out).not.toBe(instant); // it was localized, not echoed
+    expect(out).toContain('2026');
+  });
+
+  it('shifts the rendered time by timezone', () => {
+    const utc = formatBlockUntil(instant, 'en', 'UTC');
+    const ny = formatBlockUntil(instant, 'en', 'America/New_York');
+    expect(ny).not.toBe(utc); // 12:00 UTC renders as a different wall-clock in New York
+  });
+
+  it('falls back to the raw string for an unparseable instant', () => {
+    expect(formatBlockUntil('not-a-date', 'en', 'UTC')).toBe('not-a-date');
+  });
+
+  it('does not throw on an invalid timezone, still rendering the date', () => {
+    const out = formatBlockUntil(instant, 'en', 'Not/AZone');
+    expect(out).toContain('2026');
+  });
+});
diff --git a/ui/src/lib/blocked.ts b/ui/src/lib/blocked.ts
new file mode 100644
index 0000000..a26e2de
--- /dev/null
+++ b/ui/src/lib/blocked.ts
@@ -0,0 +1,27 @@
+// Pure helpers for the terminal blocked screen, kept out of the .svelte component so they are
+// unit-testable in the node vitest env.
+
+import type { Locale } from './i18n/index.svelte';
+
+/**
+ * formatBlockUntil renders a temporary block's RFC3339 UTC expiry in the user's locale and
+ * timezone, e.g. "1 Jul 2026, 15:00". It falls back to UTC formatting when the timezone is
+ * unknown/invalid, and to the raw string when the instant cannot be parsed at all.
+ */
+export function formatBlockUntil(until: string, locale: Locale, timeZone: string): string {
+  const d = new Date(until);
+  if (Number.isNaN(d.getTime())) return until;
+  try {
+    return new Intl.DateTimeFormat(locale, {
+      dateStyle: 'medium',
+      timeStyle: 'short',
+      timeZone: timeZone || undefined,
+    }).format(d);
+  } catch {
+    try {
+      return new Intl.DateTimeFormat(locale, { dateStyle: 'medium', timeStyle: 'short' }).format(d);
+    } catch {
+      return until;
+    }
+  }
+}
diff --git a/ui/src/lib/client.ts b/ui/src/lib/client.ts
index efe63fb..c73a775 100644
--- a/ui/src/lib/client.ts
+++ b/ui/src/lib/client.ts
@@ -6,6 +6,7 @@
 
 import type {
   AccountRef,
+  BlockStatus,
   ChatMessage,
   EvalResult,
   FriendCode,
@@ -60,6 +61,9 @@ export interface GatewayClient {
 
   // --- profile / lists ---
   profileGet(): Promise<Profile>;
+  /** The caller's current manual block. Exempt from the backend's suspension gate, so a blocked
+   *  client can still fetch it to render the blocked screen. */
+  blockStatus(): Promise<BlockStatus>;
   gamesList(): Promise<GameList>;
 
   // --- lobby ---
diff --git a/ui/src/lib/codec.test.ts b/ui/src/lib/codec.test.ts
index 121df13..5717c63 100644
--- a/ui/src/lib/codec.test.ts
+++ b/ui/src/lib/codec.test.ts
@@ -3,6 +3,7 @@ import { describe, expect, it } from 'vitest';
 import * as fb from '../gen/fbs/scrabblefb';
 import { BLANK_INDEX, setAlphabet } from './alphabet';
 import {
+  decodeBlockStatus,
   decodeDraftView,
   decodeEvent,
   decodeFriendList,
@@ -37,6 +38,38 @@ describe('codec', () => {
     expect(decodeDraftView(b.asUint8Array())).toBe('{"x":1}');
   });
 
+  it('decodes a temporary BlockStatus with reason', () => {
+    const b = new Builder(64);
+    const until = b.createString('2026-07-01T12:00:00Z');
+    const reason = b.createString('Спам');
+    fb.BlockStatus.startBlockStatus(b);
+    fb.BlockStatus.addBlocked(b, true);
+    fb.BlockStatus.addPermanent(b, false);
+    fb.BlockStatus.addUntil(b, until);
+    fb.BlockStatus.addReason(b, reason);
+    b.finish(fb.BlockStatus.endBlockStatus(b));
+    expect(decodeBlockStatus(b.asUint8Array())).toEqual({
+      blocked: true,
+      permanent: false,
+      until: '2026-07-01T12:00:00Z',
+      reason: 'Спам',
+    });
+  });
+
+  it('decodes a permanent BlockStatus with empty until/reason', () => {
+    const b = new Builder(32);
+    fb.BlockStatus.startBlockStatus(b);
+    fb.BlockStatus.addBlocked(b, true);
+    fb.BlockStatus.addPermanent(b, true);
+    b.finish(fb.BlockStatus.endBlockStatus(b));
+    expect(decodeBlockStatus(b.asUint8Array())).toEqual({
+      blocked: true,
+      permanent: true,
+      until: '',
+      reason: '',
+    });
+  });
+
   it('encodes a SubmitPlayRequest with alphabet indices', () => {
     setAlphabet('scrabble_en', [
       { index: 0, letter: 'a', value: 1 },
diff --git a/ui/src/lib/codec.ts b/ui/src/lib/codec.ts
index 7882a74..5d7e29d 100644
--- a/ui/src/lib/codec.ts
+++ b/ui/src/lib/codec.ts
@@ -9,6 +9,7 @@ import { indexForLetter, letterForIndex, setAlphabet, type AlphabetEntryWire } f
 import type { PlacedTile } from './client';
 import type {
   AccountRef,
+  BlockStatus,
   ChatMessage,
   EvalResult,
   FriendCode,
@@ -314,6 +315,16 @@ export function decodeProfile(buf: Uint8Array): Profile {
   };
 }
 
+export function decodeBlockStatus(buf: Uint8Array): BlockStatus {
+  const b = fb.BlockStatus.getRootAsBlockStatus(new ByteBuffer(buf));
+  return {
+    blocked: b.blocked(),
+    permanent: b.permanent(),
+    until: s(b.until()),
+    reason: s(b.reason()),
+  };
+}
+
 // decodeStateViewTable projects a StateView table (a root or one nested in an event) to the
 // model. It caches the alphabet when present (a per-variant cache miss) and decodes the index
 // rack to display letters with it.
diff --git a/ui/src/lib/i18n/en.ts b/ui/src/lib/i18n/en.ts
index f834b3c..3c86897 100644
--- a/ui/src/lib/i18n/en.ts
+++ b/ui/src/lib/i18n/en.ts
@@ -6,6 +6,11 @@ export const en = {
   'app.title': 'Scrabble',
   'connection.connecting': 'Connecting…',
 
+  'blocked.title': 'Account blocked',
+  'blocked.permanent': 'Your account is blocked.',
+  'blocked.temporary': 'Your account is blocked until {until}.',
+  'blocked.reason': 'Reason:',
+
   'common.back': 'Back',
   'common.cancel': 'Cancel',
   'common.ok': 'OK',
diff --git a/ui/src/lib/i18n/ru.ts b/ui/src/lib/i18n/ru.ts
index 4ade79d..925fd80 100644
--- a/ui/src/lib/i18n/ru.ts
+++ b/ui/src/lib/i18n/ru.ts
@@ -7,6 +7,11 @@ export const ru: Record<MessageKey, string> = {
   'app.title': 'Scrabble',
   'connection.connecting': 'Подключение…',
 
+  'blocked.title': 'Учётная запись заблокирована',
+  'blocked.permanent': 'Ваша учётная запись заблокирована.',
+  'blocked.temporary': 'Ваша учётная запись заблокирована до {until}.',
+  'blocked.reason': 'Причина:',
+
   'common.back': 'Назад',
   'common.cancel': 'Отмена',
   'common.ok': 'ОК',
diff --git a/ui/src/lib/mock/client.ts b/ui/src/lib/mock/client.ts
index 5c40716..3f86e52 100644
--- a/ui/src/lib/mock/client.ts
+++ b/ui/src/lib/mock/client.ts
@@ -13,6 +13,7 @@ import type {
 import { GatewayError } from '../client';
 import type {
   AccountRef,
+  BlockStatus,
   ChatMessage,
   EvalResult,
   FriendCode,
@@ -139,6 +140,10 @@ export class MockGateway implements GatewayClient {
   async profileGet(): Promise<Profile> {
     return { ...this.profile };
   }
+  async blockStatus(): Promise<BlockStatus> {
+    // The mock never blocks; the blocked screen is driven directly via the mock-mode __block seam.
+    return { blocked: false, permanent: false, until: '', reason: '' };
+  }
   async gamesList(): Promise<GameList> {
     return { games: [...this.games.values()].map((g) => structuredClone(g.view)) };
   }
diff --git a/ui/src/lib/model.ts b/ui/src/lib/model.ts
index 72fd8f2..806a334 100644
--- a/ui/src/lib/model.ts
+++ b/ui/src/lib/model.ts
@@ -121,6 +121,18 @@ export interface Profile {
   notificationsInAppOnly: boolean;
 }
 
+/** BlockStatus is the caller's current manual block, fetched after any call reports
+ *  the "account_blocked" code. When blocked the app shows the terminal blocked screen
+ *  and stops all push/poll. */
+export interface BlockStatus {
+  blocked: boolean;
+  permanent: boolean;
+  /** RFC3339 UTC instant for a temporary block; "" for a permanent one or when not blocked. */
+  until: string;
+  /** Operator reason resolved to the account's language; "" when none was cited. */
+  reason: string;
+}
+
 /** The full editable profile sent to profileUpdate (overwrites every field). */
 export interface ProfileUpdate {
   displayName: string;
diff --git a/ui/src/lib/transport.ts b/ui/src/lib/transport.ts
index a976a21..94df8af 100644
--- a/ui/src/lib/transport.ts
+++ b/ui/src/lib/transport.ts
@@ -77,6 +77,9 @@ export function createTransport(baseUrl: string): GatewayClient {
     async profileGet() {
       return codec.decodeProfile(await exec('profile.get', codec.empty()));
     },
+    async blockStatus() {
+      return codec.decodeBlockStatus(await exec('account.block_status', codec.empty()));
+    },
     async gamesList() {
       return codec.decodeGameList(await exec('games.list', codec.empty()));
     },
diff --git a/ui/src/screens/Blocked.svelte b/ui/src/screens/Blocked.svelte
new file mode 100644
index 0000000..e6b9431
--- /dev/null
+++ b/ui/src/screens/Blocked.svelte
@@ -0,0 +1,53 @@
+<script lang="ts">
+  // The terminal blocked screen. While app.blocked is set, App.svelte renders only this and all
+  // push/poll is stopped; the screen itself makes no network calls. The message is permanent or
+  // dated (the expiry rendered in the user's locale + timezone), with the optional operator reason.
+  import { app } from '../lib/app.svelte';
+  import { t } from '../lib/i18n/index.svelte';
+  import { formatBlockUntil } from '../lib/blocked';
+
+  const until = $derived(
+    app.blocked?.until ? formatBlockUntil(app.blocked.until, app.locale, app.profile?.timeZone ?? '') : '',
+  );
+  const message = $derived(until ? t('blocked.temporary', { until }) : t('blocked.permanent'));
+</script>
+
+<div class="blocked">
+  <div class="card">
+    <h1>{t('blocked.title')}</h1>
+    <p class="msg">{message}</p>
+    {#if app.blocked?.reason}
+      <p class="reason"><span class="label">{t('blocked.reason')}</span> {app.blocked.reason}</p>
+    {/if}
+  </div>
+</div>
+
+<style>
+  .blocked {
+    height: 100%;
+    display: grid;
+    place-items: center;
+    padding: 24px;
+    background: var(--bg);
+  }
+  .card {
+    max-width: 28rem;
+    text-align: center;
+    color: var(--text);
+  }
+  h1 {
+    margin: 0 0 0.75rem;
+    font-size: 1.25rem;
+  }
+  .msg {
+    margin: 0;
+    color: var(--text);
+  }
+  .reason {
+    margin: 1rem 0 0;
+    color: var(--text-muted);
+  }
+  .label {
+    font-weight: 600;
+  }
+</style>

From 290874720f93f59f0cf12992cb03d3415fe30950 Mon Sep 17 00:00:00 2001
From: Ilia Denisov <evilcart@gmail.com>
Date: Sun, 14 Jun 2026 22:24:57 +0200
Subject: [PATCH 2/2] perf(admin): cache the suspension gate lookup

The suspension gate runs CurrentSuspension on every authenticated request. Add a write-through in-memory cache on account.Store keyed by account id, invalidated on Suspend/LiftSuspension, with the cached entry re-evaluated against the wall clock so a temporary block lapses without an explicit invalidation. Single-instance, matching the deployment (one shared Store). Keeps the gate off the database on the hot path while a block still takes effect on the next request.
---
 backend/internal/account/account.go           |  5 +-
 backend/internal/account/suspension.go        | 82 +++++++++++++++++++
 .../internal/account/suspension_cache_test.go | 52 ++++++++++++
 3 files changed, 138 insertions(+), 1 deletion(-)
 create mode 100644 backend/internal/account/suspension_cache_test.go

diff --git a/backend/internal/account/account.go b/backend/internal/account/account.go
index a436da6..16d7d22 100644
--- a/backend/internal/account/account.go
+++ b/backend/internal/account/account.go
@@ -99,12 +99,15 @@ type Identity struct {
 type Store struct {
 	db      *sql.DB
 	metrics *accountMetrics
+	// suspensions caches each account's current manual block, read by the suspension gate on
+	// every authenticated request and invalidated on Suspend/LiftSuspension. See suspension.go.
+	suspensions *suspensionCache
 }
 
 // NewStore constructs a Store wrapping db. Metrics default to a no-op meter until
 // SetMetrics installs the real one during startup wiring.
 func NewStore(db *sql.DB) *Store {
-	return &Store{db: db, metrics: defaultAccountMetrics()}
+	return &Store{db: db, metrics: defaultAccountMetrics(), suspensions: newSuspensionCache()}
 }
 
 // ProvisionByIdentity returns the account bound to (kind, externalID), creating
diff --git a/backend/internal/account/suspension.go b/backend/internal/account/suspension.go
index e1e2039..155f289 100644
--- a/backend/internal/account/suspension.go
+++ b/backend/internal/account/suspension.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"sync"
 	"time"
 
 	"github.com/go-jet/jet/v2/postgres"
@@ -82,6 +83,7 @@ func (s *Store) Suspend(ctx context.Context, accountID uuid.UUID, until *time.Ti
 	if err := stmt.QueryContext(ctx, s.db, &row); err != nil {
 		return Suspension{}, fmt.Errorf("account: suspend %s: %w", accountID, err)
 	}
+	s.invalidateSuspension(accountID)
 	return modelToSuspension(row), nil
 }
 
@@ -100,6 +102,7 @@ func (s *Store) LiftSuspension(ctx context.Context, accountID uuid.UUID) error {
 	if _, err := stmt.ExecContext(ctx, s.db); err != nil {
 		return fmt.Errorf("account: lift suspension %s: %w", accountID, err)
 	}
+	s.invalidateSuspension(accountID)
 	return nil
 }
 
@@ -115,6 +118,30 @@ func (s *Store) CurrentSuspension(ctx context.Context, accountID uuid.UUID) (Sus
 		return Suspension{}, false, nil
 	}
 	now := time.Now().UTC()
+	if s.suspensions != nil {
+		if e, ok := s.suspensions.get(accountID); ok {
+			if !e.found {
+				return Suspension{}, false, nil // cached: not blocked
+			}
+			if suspensionActiveAt(e.susp, now) {
+				return e.susp, true, nil // cached block still in force
+			}
+			// The cached block has lapsed since it was cached; refresh from the database below.
+		}
+	}
+	susp, found, err := s.queryCurrentSuspension(ctx, accountID, now)
+	if err != nil {
+		return Suspension{}, false, err
+	}
+	if s.suspensions != nil {
+		s.suspensions.put(accountID, suspensionCacheEntry{susp: susp, found: found})
+	}
+	return susp, found, nil
+}
+
+// queryCurrentSuspension reads the account's strongest in-force block straight from the database
+// (no cache), as of now. It backs CurrentSuspension on a cache miss or a lapsed entry.
+func (s *Store) queryCurrentSuspension(ctx context.Context, accountID uuid.UUID, now time.Time) (Suspension, bool, error) {
 	stmt := postgres.SELECT(table.AccountSuspensions.AllColumns).
 		FROM(table.AccountSuspensions).
 		WHERE(
@@ -134,6 +161,61 @@ func (s *Store) CurrentSuspension(ctx context.Context, accountID uuid.UUID) (Sus
 	return modelToSuspension(row), true, nil
 }
 
+// invalidateSuspension drops the account's cached block so the next CurrentSuspension re-reads it.
+// Called after Suspend and LiftSuspension.
+func (s *Store) invalidateSuspension(accountID uuid.UUID) {
+	if s.suspensions != nil {
+		s.suspensions.invalidate(accountID)
+	}
+}
+
+// suspensionActiveAt reports whether a suspension is in force at now: permanent, or not yet
+// expired. The lifted check is implicit — only non-lifted blocks are ever cached or returned.
+func suspensionActiveAt(susp Suspension, now time.Time) bool {
+	return susp.BlockedUntil == nil || susp.BlockedUntil.After(now)
+}
+
+// suspensionCache is the gate's write-through cache of each account's current block, keyed by
+// account id. The suspension gate reads it on every authenticated request; Suspend and
+// LiftSuspension invalidate the account's entry. An entry holds the strongest active block at
+// query time (or a not-blocked marker), re-evaluated against the wall clock on read, so a
+// temporary block lapses without an explicit invalidation. It is single-instance, matching the
+// deployment (one shared Store); a multi-instance deployment would need a shared cache.
+type suspensionCache struct {
+	mu sync.RWMutex
+	m  map[uuid.UUID]suspensionCacheEntry
+}
+
+// suspensionCacheEntry is a cached lookup: the strongest active block when found, else a
+// not-blocked marker (found=false).
+type suspensionCacheEntry struct {
+	susp  Suspension
+	found bool
+}
+
+func newSuspensionCache() *suspensionCache {
+	return &suspensionCache{m: make(map[uuid.UUID]suspensionCacheEntry)}
+}
+
+func (c *suspensionCache) get(id uuid.UUID) (suspensionCacheEntry, bool) {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	e, ok := c.m[id]
+	return e, ok
+}
+
+func (c *suspensionCache) put(id uuid.UUID, e suspensionCacheEntry) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.m[id] = e
+}
+
+func (c *suspensionCache) invalidate(id uuid.UUID) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	delete(c.m, id)
+}
+
 // activeSuspensionPredicate matches the rows of a block that is in force at now: not lifted and
 // either permanent or not yet expired.
 func activeSuspensionPredicate(now time.Time) postgres.BoolExpression {
diff --git a/backend/internal/account/suspension_cache_test.go b/backend/internal/account/suspension_cache_test.go
new file mode 100644
index 0000000..9ec24b3
--- /dev/null
+++ b/backend/internal/account/suspension_cache_test.go
@@ -0,0 +1,52 @@
+package account
+
+import (
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+// TestSuspensionActiveAt covers the wall-clock re-evaluation the cache relies on: a permanent
+// block is always active, a future-dated one is active, a past-dated one is not.
+func TestSuspensionActiveAt(t *testing.T) {
+	now := time.Date(2026, 6, 14, 12, 0, 0, 0, time.UTC)
+	future := now.Add(time.Hour)
+	past := now.Add(-time.Hour)
+
+	if !suspensionActiveAt(Suspension{BlockedUntil: nil}, now) {
+		t.Error("a permanent block must be active")
+	}
+	if !suspensionActiveAt(Suspension{BlockedUntil: &future}, now) {
+		t.Error("a future-dated block must be active")
+	}
+	if suspensionActiveAt(Suspension{BlockedUntil: &past}, now) {
+		t.Error("a past-dated block must be inactive")
+	}
+}
+
+// TestSuspensionCache covers the cache primitives: a miss on an empty cache, a hit after put for
+// both the not-blocked and blocked markers, and a miss after invalidate.
+func TestSuspensionCache(t *testing.T) {
+	c := newSuspensionCache()
+	id := uuid.New()
+
+	if _, ok := c.get(id); ok {
+		t.Fatal("empty cache must miss")
+	}
+
+	c.put(id, suspensionCacheEntry{found: false})
+	if e, ok := c.get(id); !ok || e.found {
+		t.Fatalf("cached not-blocked entry = (%+v, ok %v), want hit with found=false", e, ok)
+	}
+
+	c.put(id, suspensionCacheEntry{susp: Suspension{AccountID: id}, found: true})
+	if e, ok := c.get(id); !ok || !e.found {
+		t.Fatalf("cached blocked entry = (%+v, ok %v), want hit with found=true", e, ok)
+	}
+
+	c.invalidate(id)
+	if _, ok := c.get(id); ok {
+		t.Fatal("invalidated entry must miss")
+	}
+}