[bugfix/chore] Announce reliability updates (#2405)

* [bugfix/chore] `Announce` updates

* test update

* fix tests

* TestParseAnnounce

* update comments

* don't lock/unlock, change function signature

* naming stuff

* don't check domain block twice

* UnwrapIfBoost

* beep boop

internal/web/thread.go

@@ -20,6 +20,7 @@ package web
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"net/http"
 	"strings"
@@ -124,6 +125,13 @@ func (m *Module) threadGETHandler(c *gin.Context) {
 		return
 	}
 
+	// Don't render boosts/reblogs as top-level statuses.
+	if status.Reblog != nil {
+		err := errors.New("status is a boost wrapper / reblog")
+		apiutil.WebErrorHandler(c, gtserror.NewErrorNotFound(err), instanceGet)
+		return
+	}
+
 	// Fill in the rest of the thread context.
 	context, errWithCode := m.processor.Status().WebContextGet(ctx, targetStatusID)
 	if errWithCode != nil {