Keep the server admission test inside the intent boundary

Why: the U6 admission test imported agent-intent directly from
internal/server, which lint-boundaries forbids (only intentgate,
intentsem and the squad intent adapter may import it).
Evidence: repair receipt success; server/intentgate/route tests pass
(verify-u6r.json); fixtures moved behind intentgate helpers.
Impact: test-only rework plus a small intentgate fixture helper.
Refs: feature/agent-stack-audit-remediation-b1 U6 repair

internal/intentgate/gate.go

@@ -55,11 +55,14 @@ type MatchResult struct {
 // Complete 报告槽位是否齐全且全部通过权威校验：false 时业务动作不得派发。
 func (m MatchResult) Complete() bool { return len(m.Missing) == 0 && len(m.Invalid) == 0 }
 
-// 命令类型经闸门投影（别名）：生态库按边界规则只许本包导入，
-// Router/runmgr 等消费方只依赖本包表面。
+// 命令与目录类型经闸门投影（别名）：生态库按边界规则只许本包导入，
+// Router/runmgr 等消费方只依赖本包表面。CatalogSpec/CatalogSlot 随生成器端口
+// （SetGenerator 的入参）投影，实现生成器不必越过本包直接引用生态库。
 type (
-	Command   = agentintent.Command
-	ActionRef = agentintent.ActionRef
+	Command     = agentintent.Command
+	ActionRef   = agentintent.ActionRef
+	CatalogSpec = agentintent.CatalogSpec
+	CatalogSlot = agentintent.CatalogSlot
 )
 
 const (

internal/server/e2e_test.go

@@ -946,7 +946,7 @@ func TestStaticServed(t *testing.T) {
 	_ = io.Discard
 }
 
-// TestHITLIntentPivot：装载插件意图后，自由输入命中其他意图 → 转轨（agent-intent 闸门）。
+// TestHITLIntentPivot：装载插件意图后，自由输入命中其他意图 → 转轨（intentgate 闸门）。
 func TestHITLIntentPivot(t *testing.T) {
 	srv, _ := newTestServer(t)
 	h := srv.Handler()

internal/server/intent_admission_test.go

@@ -7,7 +7,6 @@ import (
 	"testing"
 
 	agentcommand "agent-command"
-	agentintent "agent-intent/intent"
 	"agent-system-backend/internal/cmdbus"
 	"agent-system-backend/internal/intentgate"
 )
@@ -303,8 +302,10 @@ func TestHighRiskCommandStillRequiresConfirmation(t *testing.T) {
 // 显式取消命令宿主未实现：如实回落普通回合，不派发同一句里的 Start。
 type cancelGenerator struct{}
 
-func (cancelGenerator) Generate(context.Context, string, []agentintent.CatalogSpec) ([]agentintent.Command, error) {
-	return []agentintent.Command{
+// 生成器只经 intentgate 表面接线：目录与命令类型都由闸门投影，
+// 宿主实现不必（也不应）直接导入生态库。
+func (cancelGenerator) Generate(context.Context, string, []intentgate.CatalogSpec) ([]intentgate.Command, error) {
+	return []intentgate.Command{
 		{Kind: intentgate.CommandStart, Action: intentgate.ActionRef{Kind: intentgate.ActionCommand, ID: "demo.report"}},
 		{Kind: intentgate.CommandCancel, Target: "demo.report"},
 	}, nil