test(web): a foreign post to the recording delete route leaves the recording, on an app that mounts uploads (#37, #48)

The earlier entry posted to an app without uploads, where the route does not exist, and
stayed green with the route removed. This one seeds a finished row and goes red without the
gate. Found by the PR #58 review.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/web/crossorigin_test.go

@@ -113,7 +113,6 @@ func TestCrossOrigin_AForeignPostIsRefusedOnEachListedStateChangingPath(t *testi
 		"/v/abc/summarize",
 		"/v/abc/retry-now",
 		"/v/abc/chat",
-		"/uploads/00000000-0000-0000-0000-000000000000/delete",
 	}
 	for _, path := range routes {
 		t.Run(path, func(t *testing.T) {
@@ -126,6 +125,20 @@ func TestCrossOrigin_AForeignPostIsRefusedOnEachListedStateChangingPath(t *testi
 	}
 }
 
+func TestCrossOrigin_ARefusedRecordingDeletePostLeavesTheRecordingInPlace(t *testing.T) {
+	for name, h := range foreign {
+		t.Run(name, func(t *testing.T) {
+			app, _ := newUploadApp(t, audioOK, 200<<20)
+			id := seedUpload(t, userID, "m", "done", "Synthetic transcript text.")
+
+			rec := do(t, app, withHeaders(httptest.NewRequest(http.MethodPost, "/uploads/"+id+"/delete", nil), h))
+
+			assert.Equal(t, http.StatusForbidden, rec.Code)
+			assert.True(t, uploadExists(t, id), "a refused post must not delete the recording")
+		})
+	}
+}
+
 // A login redirect comes back to /auth/callback as a cross-site GET navigation, and
 // health probes carry no headers: safe methods must never be refused on origin grounds.
 func TestCrossOrigin_ACrossSiteGETIsNotRefused(t *testing.T) {