Send club context and surface TTR preview HTTP errors

frontend/tests/ttrPreview.test.mjs

@@ -102,13 +102,14 @@ test('test mode on a saved report calls the real endpoint and exposes lookup dia
         standaloneTest: false,
         isTestMode: true,
         canOpenTtrPreview: true,
-        match: { id: 42 },
+        match: { id: 42, clubId: 7 },
         meetingDetails: {},
         meetingData: { homeClub: 'TSV 1875 Bonames', guestClub: 'Eintracht Frankfurt' },
     });
     const originalPost = context.apiClient.post;
     context.apiClient.post = async (url, body) => {
         assert.equal(url, '/matches/42/ttr-preview');
+        assert.equal(body.clubId, 7);
         assert.equal(body.homeClubName, 'TSV 1875 Bonames');
         assert.equal(body.homePlayers[0].name, 'Anton Schottdorf');
         return { data: { players: [], diagnostics: [{ side: 'home', message: 'Session abgelaufen' }] } };
@@ -121,3 +122,25 @@ test('test mode on a saved report calls the real endpoint and exposes lookup dia
         context.apiClient.post = originalPost;
     }
 });
+
+test('HTTP errors accepted by the shared API client are shown instead of becoming empty results', async () => {
+    const report = dialog();
+    Object.assign(report, {
+        standaloneTest: false, canOpenTtrPreview: true,
+        match: { id: 42, clubId: 7 }, meetingDetails: {}, meetingData: {},
+    });
+    const originalPost = context.apiClient.post;
+    try {
+        for (const status of [400, 401, 403, 404, 500]) {
+            context.apiClient.post = async () => ({ status, data: { error: `Fehler ${status}` } });
+            await report.loadTtrPreview();
+            assert.equal(report.ttrError, `Fehler ${status}`);
+            assert.equal(report.ttrLoading, false);
+        }
+        context.apiClient.post = async () => ({ status: 200, data: '<html>Keine API-Antwort</html>' });
+        await report.loadTtrPreview();
+        assert.match(report.ttrError, /keine gültigen TTR-Spielerdaten/);
+    } finally {
+        context.apiClient.post = originalPost;
+    }
+});