Stage 7 (wip): wire remaining ops (backend REST, FBS, gateway transcode) + real UI transport

backend: REST handlers for pass/exchange/resign/hint/evaluate/check_word/complaint/history/chat-list/nudge + new game.ListForAccount (my games) + seat display_name resolution
pkg/fbs: GameActionRequest/ExchangeRequest/EvalRequest/EvalResult/CheckWordRequest/WordCheckResult/ComplaintRequest/HintResult/History/GameList/ChatList + SeatView.display_name; committed Go regenerated (flatc 23.5.26)
gateway: 11 new transcode ops + backendclient methods + FB encoders
ui: edge TS codegen (flatc --ts + protoc-gen-es, committed), FlatBuffers<->model codec, real connect-web transport (binary, bearer auth, Subscribe). prod bundle ~69KB gzip JS

pkg/fbs/scrabblefb/EvalResult.go

@@ -0,0 +1,102 @@
+// Code generated by the FlatBuffers compiler. DO NOT EDIT.
+
+package scrabblefb
+
+import (
+	flatbuffers "github.com/google/flatbuffers/go"
+)
+
+type EvalResult struct {
+	_tab flatbuffers.Table
+}
+
+func GetRootAsEvalResult(buf []byte, offset flatbuffers.UOffsetT) *EvalResult {
+	n := flatbuffers.GetUOffsetT(buf[offset:])
+	x := &EvalResult{}
+	x.Init(buf, n+offset)
+	return x
+}
+
+func FinishEvalResultBuffer(builder *flatbuffers.Builder, offset flatbuffers.UOffsetT) {
+	builder.Finish(offset)
+}
+
+func GetSizePrefixedRootAsEvalResult(buf []byte, offset flatbuffers.UOffsetT) *EvalResult {
+	n := flatbuffers.GetUOffsetT(buf[offset+flatbuffers.SizeUint32:])
+	x := &EvalResult{}
+	x.Init(buf, n+offset+flatbuffers.SizeUint32)
+	return x
+}
+
+func FinishSizePrefixedEvalResultBuffer(builder *flatbuffers.Builder, offset flatbuffers.UOffsetT) {
+	builder.FinishSizePrefixed(offset)
+}
+
+func (rcv *EvalResult) Init(buf []byte, i flatbuffers.UOffsetT) {
+	rcv._tab.Bytes = buf
+	rcv._tab.Pos = i
+}
+
+func (rcv *EvalResult) Table() flatbuffers.Table {
+	return rcv._tab
+}
+
+func (rcv *EvalResult) Legal() bool {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(4))
+	if o != 0 {
+		return rcv._tab.GetBool(o + rcv._tab.Pos)
+	}
+	return false
+}
+
+func (rcv *EvalResult) MutateLegal(n bool) bool {
+	return rcv._tab.MutateBoolSlot(4, n)
+}
+
+func (rcv *EvalResult) Score() int32 {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(6))
+	if o != 0 {
+		return rcv._tab.GetInt32(o + rcv._tab.Pos)
+	}
+	return 0
+}
+
+func (rcv *EvalResult) MutateScore(n int32) bool {
+	return rcv._tab.MutateInt32Slot(6, n)
+}
+
+func (rcv *EvalResult) Words(j int) []byte {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(8))
+	if o != 0 {
+		a := rcv._tab.Vector(o)
+		return rcv._tab.ByteVector(a + flatbuffers.UOffsetT(j*4))
+	}
+	return nil
+}
+
+func (rcv *EvalResult) WordsLength() int {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(8))
+	if o != 0 {
+		return rcv._tab.VectorLen(o)
+	}
+	return 0
+}
+
+func EvalResultStart(builder *flatbuffers.Builder) {
+	builder.StartObject(3)
+}
+func EvalResultAddLegal(builder *flatbuffers.Builder, legal bool) {
+	builder.PrependBoolSlot(0, legal, false)
+}
+func EvalResultAddScore(builder *flatbuffers.Builder, score int32) {
+	builder.PrependInt32Slot(1, score, 0)
+}
+func EvalResultAddWords(builder *flatbuffers.Builder, words flatbuffers.UOffsetT) {
+	builder.PrependUOffsetTSlot(2, flatbuffers.UOffsetT(words), 0)
+}
+func EvalResultStartWordsVector(builder *flatbuffers.Builder, numElems int) flatbuffers.UOffsetT {
+	return builder.StartVector(4, numElems, 4)
+}
+func EvalResultEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
+	return builder.EndObject()
+}