feat(feedback): in-app user feedback with admin review and account roles

User-facing Feedback screen (Settings -> Info, registered accounts only): a
message (<=1024 runes) plus one optional attachment, an anti-spam gate (one
unreviewed message at a time), and the operator's inline reply with a
Settings/Info badge. Server-rendered admin console section (/_gm/feedback):
unread/read/archived queue with per-user search, detail with read/reply/
archive/delete/delete-all, safe attachment serving (nosniff, images inline via
<img>, others download-only). Introduces account_roles, the first per-account
role table; feedback_banned blocks only feedback submission, granted/revoked
from /users and the delete-with-block action.

- migration 00004_feedback (feedback_messages + account_roles) + jetgen
- backend internal/feedback (store+service), internal/account/roles.go
- wire: FlatBuffers feedback.submit/get/unread; gateway guest gate (Op.NonGuest,
  is_guest via session resolve) -> guest_forbidden before any backend call
- reply push reuses NotificationEvent with a new admin_reply sub-kind
- UI: /feedback route + screen, attachment picker, badge, channel detection, i18n
- tests: feedback unit (Go+UI), gateway guest-gate, inttest lifecycle, e2e
- docs: PLAN stage 19, ARCHITECTURE s15, FUNCTIONAL(+ru), TESTING, READMEs

backend/internal/adminconsole/assets/console.css

@@ -116,3 +116,8 @@ code { background: var(--bg); padding: 0.05rem 0.3rem; border-radius: 4px; }
 .lg-min { color: var(--ok); }
 .lg-avg { color: var(--accent); }
 .lg-max { color: var(--danger); }
+
+/* Feedback: user-controlled message bodies are wrapped and escaped (never HTML);
+   an image attachment is previewed inline, bounded so it cannot dominate the page. */
+.msgbody { white-space: pre-wrap; word-break: break-word; background: var(--bg); padding: 0.6rem 0.8rem; border-radius: 6px; margin: 0.6rem 0; }
+.attach { max-width: 100%; max-height: 480px; height: auto; border: 1px solid var(--line); border-radius: 6px; }

backend/internal/adminconsole/render_test.go

@@ -25,6 +25,7 @@ func TestRendererRendersEveryPage(t *testing.T) {
 		{"users", UsersView{Items: []UserRow{{ID: "a1", DisplayName: "Kaya", FlaggedHighRate: true}}, Pager: NewPager(1, 50, 1)}, "high-rate"},
 		{"user_detail", UserDetailView{ID: "a1", DisplayName: "Kaya", HasStats: true, Stats: StatsRow{Wins: 2}, TelegramID: "123", ConnectorEnabled: true}, "Send Telegram message"},
 		{"user_detail", UserDetailView{ID: "a1", DisplayName: "Kaya", FlaggedHighRateAt: "2026-06-10 12:00"}, "Clear high-rate flag"},
+		{"user_detail", UserDetailView{ID: "a1", DisplayName: "Kaya", Roles: []string{"feedback_banned"}, KnownRoles: []string{"feedback_banned"}}, "feedback_banned"},
 		{"throttled", ThrottledView{
 			Episodes:      []ThrottleEpisodeRow{{Class: "user", Key: "a1", UserID: "a1", Rejected: 1234, FirstSeen: "2026-06-10 12:00", LastSeen: "2026-06-10 12:05"}},
 			Flagged:       []FlaggedAccountRow{{ID: "a1", DisplayName: "Kaya", FlaggedAt: "2026-06-10 12:05"}},
@@ -35,6 +36,8 @@ func TestRendererRendersEveryPage(t *testing.T) {
 		{"game_detail", GameDetailView{ID: "g1", Variant: "scrabble_en", Seats: []SeatRow{{Seat: 0, DisplayName: "Kaya"}}}, "Seats"},
 		{"complaints", ComplaintsView{Items: []ComplaintRow{{ID: "c1", Word: "qi", Status: "open"}}, Status: "open", Pager: NewPager(1, 50, 1)}, "qi"},
 		{"messages", MessagesView{Items: []MessageRow{{ID: "m1", SenderID: "a1", SenderName: "Kaya", Source: "telegram", Body: "good luck", GameID: "g1"}}, Pager: NewPager(1, 50, 1)}, "good luck"},
+		{"feedback", FeedbackView{Items: []FeedbackRow{{ID: "f1", AccountID: "a1", SenderName: "Kaya", Source: "telegram", Channel: "web", HasAttachment: true, Replied: true}}, Status: "unread", Pager: NewPager(1, 50, 1)}, "replied"},
+		{"feedback_detail", FeedbackDetailView{ID: "f1", AccountID: "a1", SenderName: "Kaya", Channel: "ios", Body: "please fix the board", HasAttachment: true, AttachmentName: "shot.png", IsImage: true, Banned: true}, "please fix the board"},
 		{"complaint_detail", ComplaintDetailView{ID: "c1", Word: "qi", Variant: "scrabble_en"}, "Resolve"},
 		{"dictionary", DictionaryView{ActiveVersion: "v1.0.0", Variants: []VariantVersions{{Variant: "scrabble_en", Versions: []string{"v1.0.0"}}}, Changes: []DictChangeRow{{Variant: "scrabble_en", Word: "qi", Action: "add"}}}, "Update dictionaries"},
 		{"dictionary_preview", DictionaryPreviewView{Version: "v1.1.0", Token: "0123456789abcdef0123456789abcdef", ActiveVersion: "v1.0.0", Variants: []VariantDiffRow{{Variant: "scrabble_en", AddedCount: 2, RemovedCount: 1, AddedSample: []string{"qi", "za"}, RemovedSample: []string{"xqz"}, RemovedTruncated: true}}}, "v1.1.0"},

backend/internal/adminconsole/templates/layout.gohtml

@@ -16,6 +16,7 @@
     <a href="/_gm/users"{{if eq .ActiveNav "users"}} class="active"{{end}}>Users</a>
     <a href="/_gm/games"{{if eq .ActiveNav "games"}} class="active"{{end}}>Games</a>
     <a href="/_gm/complaints"{{if eq .ActiveNav "complaints"}} class="active"{{end}}>Complaints</a>
+    <a href="/_gm/feedback"{{if eq .ActiveNav "feedback"}} class="active"{{end}}>Feedback</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>

backend/internal/adminconsole/templates/pages/dashboard.gohtml

@@ -7,6 +7,7 @@
 <a class="card" href="/_gm/games"><h2>Games</h2><p class="bignum">{{.Games}}</p></a>
 <a class="card" href="/_gm/games?status=active"><h2>Active games</h2><p class="bignum">{{.ActiveGames}}</p></a>
 <a class="card" href="/_gm/complaints?status=open"><h2>Open complaints</h2><p class="bignum">{{.OpenComplaints}}</p></a>
+<a class="card" href="/_gm/feedback?status=unread"><h2>Unread feedback</h2><p class="bignum">{{.OpenFeedback}}</p></a>
 <a class="card" href="/_gm/dictionary"><h2>Pending dict changes</h2><p class="bignum">{{.PendingChanges}}</p></a>
 </div>
 <section class="panel">

backend/internal/adminconsole/templates/pages/feedback.gohtml

@@ -0,0 +1,38 @@
+{{define "content" -}}
+<h1>Feedback</h1>
+{{with .Data}}
+<nav class="subnav">
+<a href="/_gm/feedback?status=unread"{{if eq .Status "unread"}} class="active"{{end}}>unread</a> ·
+<a href="/_gm/feedback?status=read"{{if eq .Status "read"}} class="active"{{end}}>read</a> ·
+<a href="/_gm/feedback?status=archived"{{if eq .Status "archived"}} class="active"{{end}}>archived</a>
+</nav>
+<form class="form" method="get" action="/_gm/feedback">
+<input type="hidden" name="status" value="{{.Status}}">
+{{if .UserID}}<input type="hidden" name="user" value="{{.UserID}}">{{end}}
+<input name="name" value="{{.NameMask}}" placeholder="display name mask (* ?)">
+<input name="ext" value="{{.ExtMask}}" placeholder="external id mask (* ?)">
+<button type="submit">Filter</button>
+</form>
+<table class="list">
+<thead><tr><th>Sender</th><th>Source</th><th>Channel</th><th>Attach</th><th>Reply</th><th>State</th><th>Filed</th></tr></thead>
+<tbody>
+{{range .Items}}
+<tr>
+<td><a href="/_gm/feedback/{{.ID}}">{{.SenderName}}</a></td>
+<td>{{.Source}}</td>
+<td>{{.Channel}}</td>
+<td>{{if .HasAttachment}}yes{{else}}<span class="note">—</span>{{end}}</td>
+<td>{{if .Replied}}<span class="ok">replied</span>{{else}}<span class="note">—</span>{{end}}</td>
+<td>{{if .Archived}}archived{{else if .Read}}read{{else}}<span class="warn">unread</span>{{end}}</td>
+<td>{{.CreatedAt}}</td>
+</tr>
+{{else}}<tr><td colspan="7"><span class="note">no feedback</span></td></tr>{{end}}
+</tbody>
+</table>
+<nav class="pager">
+{{if .Pager.HasPrev}}<a href="/_gm/feedback?{{.FilterQuery}}&amp;page={{.Pager.PrevPage}}">&laquo; prev</a>{{end}}
+<span>page {{.Pager.Page}} · {{.Pager.Total}} total</span>
+{{if .Pager.HasNext}}<a href="/_gm/feedback?{{.FilterQuery}}&amp;page={{.Pager.NextPage}}">next &raquo;</a>{{end}}
+</nav>
+{{end}}
+{{- end}}

backend/internal/adminconsole/templates/pages/feedback_detail.gohtml

@@ -0,0 +1,46 @@
+{{define "content" -}}
+{{with .Data}}
+<h1>Feedback</h1>
+<nav class="subnav"><a href="/_gm/feedback">&laquo; feedback</a> · <a href="/_gm/users/{{.AccountID}}">user</a></nav>
+<section class="panel"><h2>Message</h2>
+<ul class="kv">
+<li><b>From</b> <a href="/_gm/users/{{.AccountID}}">{{.SenderName}}</a> ({{.Source}})</li>
+<li><b>Channel</b> {{.Channel}}</li>
+<li><b>IP</b> {{if .IP}}<code>{{.IP}}</code>{{else}}<span class="note">none</span>{{end}}</li>
+<li><b>Filed</b> {{.CreatedAt}}</li>
+<li><b>State</b> {{if .Archived}}archived{{else if .Read}}read{{else}}<span class="warn">unread</span>{{end}}</li>
+{{if .Banned}}<li><b>Feedback</b> <span class="warn">sender is banned from feedback</span></li>{{end}}
+</ul>
+<div class="msgbody">{{.Body}}</div>
+{{if .HasAttachment}}
+<h3>Attachment</h3>
+{{if .IsImage}}<p><img class="attach" src="/_gm/feedback/{{.ID}}/attachment" alt="attachment"></p>{{end}}
+<p><a href="/_gm/feedback/{{.ID}}/attachment" download>download {{.AttachmentName}}</a></p>
+{{end}}
+</section>
+{{if .Replied}}
+<section class="panel"><h2>Current reply</h2>
+<div class="msgbody">{{.ReplyBody}}</div>
+<p class="note">sent {{.RepliedAt}}</p>
+</section>
+{{end}}
+<section class="panel"><h2>{{if .Replied}}Re-reply{{else}}Reply{{end}}</h2>
+<form class="form col" method="post" action="/_gm/feedback/{{.ID}}/reply">
+<label>Reply <textarea name="reply" required></textarea></label>
+<div><button type="submit">Send reply</button></div>
+</form>
+</section>
+<section class="panel"><h2>Actions</h2>
+<form class="form" method="post" action="/_gm/feedback/{{.ID}}/read"><button type="submit">Mark read</button></form>
+<form class="form" method="post" action="/_gm/feedback/{{.ID}}/archive"><button type="submit">Archive</button></form>
+<form class="form col" method="post" action="/_gm/feedback/{{.ID}}/delete">
+<label><input type="checkbox" name="block" value="1"> ban the player from feedback</label>
+<div><button type="submit">Delete</button></div>
+</form>
+<form class="form col" method="post" action="/_gm/feedback/{{.ID}}/delete-all">
+<label><input type="checkbox" name="block" value="1"> ban the player from feedback</label>
+<div><button type="submit">Delete all from this player</button></div>
+</form>
+</section>
+{{end}}
+{{- end}}

backend/internal/adminconsole/templates/pages/user_detail.gohtml

@@ -1,7 +1,7 @@
 {{define "content" -}}
 {{with .Data}}
 <h1>{{.DisplayName}}</h1>
-<nav class="subnav"><a href="/_gm/users">&laquo; users</a> · <a href="/_gm/messages?user={{.ID}}">messages</a></nav>
+<nav class="subnav"><a href="/_gm/users">&laquo; users</a> · <a href="/_gm/messages?user={{.ID}}">messages</a> · <a href="/_gm/feedback?user={{.ID}}">feedback</a></nav>
 <div class="cards">
 <section class="panel"><h2>Account</h2>
 <ul class="kv">
@@ -67,6 +67,23 @@
 <div><button type="submit">{{if .Suspension.Blocked}}Re-block{{else}}Block{{end}}</button></div>
 </form>
 </section>
+<section class="panel"><h2>Roles</h2>
+{{$id := .ID}}
+{{if .Roles}}
+<table class="list">
+<thead><tr><th>Role</th><th></th></tr></thead>
+<tbody>
+{{range .Roles}}
+<tr><td><code>{{.}}</code></td><td><form class="form" method="post" action="/_gm/users/{{$id}}/revoke-role"><input type="hidden" name="role" value="{{.}}"><button type="submit">Revoke</button></form></td></tr>
+{{end}}
+</tbody>
+</table>
+{{else}}<p class="note">no roles</p>{{end}}
+<form class="form col" method="post" action="/_gm/users/{{$id}}/grant-role">
+<label>Grant role <select name="role">{{range .KnownRoles}}<option value="{{.}}">{{.}}</option>{{end}}</select></label>
+<div><button type="submit">Grant</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>

backend/internal/adminconsole/views.go

@@ -42,6 +42,7 @@ type DashboardView struct {
 	Games          int
 	ActiveGames    int
 	OpenComplaints int
+	OpenFeedback   int
 	PendingChanges int
 	// ActiveVersion is the dictionary version new games pin (the persisted active
 	// version), distinct from the per-variant resident versions.
@@ -142,6 +143,10 @@ type UserDetailView struct {
 	// form; Reasons is the operator-editable reason picklist offered in the block form.
 	Suspension SuspensionView
 	Reasons    []ReasonOption
+	// Roles is the account's current roles (each revocable); KnownRoles is the set the
+	// grant form offers. The first role is the feedback ban (see internal/account).
+	Roles      []string
+	KnownRoles []string
 }
 
 // SuspensionView is an account's current manual-block state shown on the user card: whether it
@@ -362,3 +367,58 @@ type MessageView struct {
 	Body    string
 	Back    string
 }
+
+// FeedbackView is the paginated user-feedback queue. Status is the active
+// unread/read/archived filter; NameMask/ExtMask are the sender glob filters;
+// UserID pins the list to one account (the per-user link from /users);
+// FilterQuery is the active filters URL-encoded for the pager links (already
+// escaped, hence template.URL — see UsersView.FilterQuery).
+type FeedbackView struct {
+	Items       []FeedbackRow
+	Status      string
+	NameMask    string
+	ExtMask     string
+	UserID      string
+	Pager       Pager
+	FilterQuery template.URL
+}
+
+// FeedbackRow is one feedback message in the queue: its sender (linked to the user
+// card), source, channel, whether it has an attachment / a reply, its state and
+// time.
+type FeedbackRow struct {
+	ID            string
+	AccountID     string
+	SenderName    string
+	Source        string
+	Channel       string
+	HasAttachment bool
+	Read          bool
+	Replied       bool
+	Archived      bool
+	CreatedAt     string
+}
+
+// FeedbackDetailView is one feedback message with its body, attachment, state and
+// the reply / archive / delete forms. Body, AttachmentName, SenderName and IP are
+// user-controlled and rendered as plain auto-escaped text. IsImage gates the inline
+// <img> preview; Banned shows whether the sender already holds the feedback ban.
+type FeedbackDetailView struct {
+	ID             string
+	AccountID      string
+	SenderName     string
+	Source         string
+	Channel        string
+	IP             string
+	Body           string
+	HasAttachment  bool
+	AttachmentName string
+	IsImage        bool
+	Read           bool
+	Archived       bool
+	Replied        bool
+	ReplyBody      string
+	RepliedAt      string
+	CreatedAt      string
+	Banned         bool
+}