feat: add Z12/Z13 bind APIs, stock import, and sync docs

Enable auto default sync channels on agent activate, bind-code/phone confirm flows, publish ALTER, and align admin/yuheng docs with the production bind path.

platform/internal/handler/ensure_import.go

@@ -0,0 +1,48 @@
+package handler
+
+import (
+	"net/http"
+	"strings"
+
+	"aijianzhan/platform/internal/audit"
+	"aijianzhan/platform/internal/authx"
+	"aijianzhan/platform/internal/meta"
+	"aijianzhan/platform/internal/svc"
+
+	"github.com/zeromicro/go-zero/rest/httpx"
+)
+
+// platformEnsureImportHandler Z9e：超管扫全库已发布模块补齐 import/export。
+// POST /api/v1/platform/apps/ensure-import?dry_run=1
+func platformEnsureImportHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		dry := r.URL.Query().Get("dry_run") == "1" || strings.EqualFold(r.URL.Query().Get("dry_run"), "true")
+		res, err := meta.BackfillDefaultImportExport(r.Context(), svcCtx.Meta, dry)
+		if err != nil {
+			authx.WriteError(w, http.StatusBadRequest, err.Error())
+			return
+		}
+		if svcCtx.Audit != nil {
+			_ = svcCtx.Audit.Log(r.Context(), 0, authx.UserID(r.Context()), "apps.ensure_import", audit.DetailJSON(res))
+		}
+		httpx.OkJson(w, res)
+	}
+}
+
+// adminEnsureImportHandler Z9e：租户管理员对本公司已发布模块一键开启导入。
+// POST /api/v1/admin/apps/ensure-import?dry_run=1
+func adminEnsureImportHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		dry := r.URL.Query().Get("dry_run") == "1" || strings.EqualFold(r.URL.Query().Get("dry_run"), "true")
+		tid := authx.TenantID(r.Context())
+		res, err := meta.BackfillDefaultImportExportForTenant(r.Context(), svcCtx.Meta, tid, dry)
+		if err != nil {
+			authx.WriteError(w, http.StatusBadRequest, err.Error())
+			return
+		}
+		if svcCtx.Audit != nil {
+			_ = svcCtx.Audit.Log(r.Context(), tid, authx.UserID(r.Context()), "apps.ensure_import", audit.DetailJSON(res))
+		}
+		httpx.OkJson(w, res)
+	}
+}