Run cookie detection regardless of banner state

Decouple detection from the banner's active state so admins
can discover cookies before making the banner visible. The
client now starts the detector even when the config endpoint
returns 404, and the detector stops itself if the report
endpoint returns 404 (wrong or deleted banner ID).

Signed-off-by: Émile Ré <emile@getprobo.com>

packages/cookie-banner/src/client.ts

@@ -120,6 +120,7 @@ export class CookieBannerClient {
     try {
       config = await fetchJSON<BannerConfig>(configUrl);
     } catch {
+      this.startDetector();
       return;
     }
     this.bannerConfig = config;
@@ -324,14 +325,16 @@ export class CookieBannerClient {
     this.observer = observeAndActivate(consentData, categoryLabels, texts);
   }
 
-  private startDetector(config: BannerConfig): void {
+  private startDetector(config?: BannerConfig): void {
     const knownNames = new Set<string>();
     knownNames.add(COOKIE_NAME);
+    if (config) {
       for (const cat of config.categories) {
         for (const cookie of cat.cookies) {
           knownNames.add(cookie.name);
         }
       }
+    }
 
     if (this.detector) {
       this.detector.stop();

packages/cookie-banner/src/detector.ts

@@ -13,6 +13,7 @@
 // PERFORMANCE OF THIS SOFTWARE.
 
 import { isDeletion, parseCookieName, parseMaxAgeSeconds } from "./cookie-utils";
+import { NotFoundError } from "./errors";
 import { fetchJSON } from "./http";
 
 interface DetectedCookieEntry {
@@ -140,7 +141,11 @@ export class CookieDetector {
     void fetchJSON(this.reportUrl, {
       method: "POST",
       body: { cookies: entries },
-    }).catch(() => {});
+    }).catch((err) => {
+      if (err instanceof NotFoundError) {
+        this.stop();
+      }
+    });
 
     if (this.pending.size > 0) {
       this.scheduleFlush();

pkg/cookiebanner/service.go

@@ -2202,16 +2202,16 @@ func (s *Service) ReportDetectedCookies(
 	return s.pg.WithTx(
 		ctx,
 		func(ctx context.Context, tx pg.Tx) error {
+			scope := coredata.NewScopeFromObjectID(bannerID)
+
 			var banner coredata.CookieBanner
-			if err := banner.LoadActiveByID(ctx, tx, bannerID); err != nil {
+			if err := banner.LoadByID(ctx, tx, scope, bannerID); err != nil {
 				if errors.Is(err, coredata.ErrResourceNotFound) {
 					return ErrBannerNotFound
 				}
-				return fmt.Errorf("cannot load active cookie banner: %w", err)
+				return fmt.Errorf("cannot load cookie banner: %w", err)
 			}
 
-			scope := coredata.NewScopeFromObjectID(banner.ID)
-
 			var uncategorised coredata.CookieCategory
 			if err := uncategorised.LoadUncategorisedByCookieBannerID(ctx, tx, scope, banner.ID); err != nil {
 				return fmt.Errorf("cannot load uncategorised category: %w", err)