fix(myTischtennis): improve error handling for Playwright login and account verification

- Enhanced error handling in MyTischtennisClient and MyTischtennisService to provide clearer feedback when browser executables are missing.
- Updated responses to include specific error messages and status codes, improving user guidance for setup requirements.
- Refactored MyTischtennisDialog and MyTischtennisAccount components to handle API response errors more effectively, ensuring robust login and account management processes.

backend/clients/myTischtennisClient.js

@@ -520,10 +520,17 @@ class MyTischtennisClient {
         cookie
       };
     } catch (error) {
-      console.error('[myTischtennisClient.playwright] Browser login failed:', error?.message || error);
+      const rawMessage = String(error?.message || error || 'Playwright-Login fehlgeschlagen');
+      const isMissingBrowserExecutable = /Executable doesn't exist|download new browsers|playwright install/i.test(rawMessage);
+      const normalizedError = isMissingBrowserExecutable
+        ? 'Playwright-Browser ist auf dem Server nicht installiert. Bitte "npx playwright install chromium" ausführen.'
+        : rawMessage;
+      console.error('[myTischtennisClient.playwright] Browser login failed:', normalizedError);
       return {
         success: false,
-        error: error?.message || 'Playwright-Login fehlgeschlagen'
+        error: normalizedError,
+        requiresSetup: isMissingBrowserExecutable,
+        status: isMissingBrowserExecutable ? 503 : 400
       };
     } finally {
       if (context) {

backend/services/myTischtennisService.js

@@ -247,20 +247,25 @@ class MyTischtennisService {
           effectiveLoginResult = playwrightResult;
         } else {
           console.warn('[myTischtennisService.verifyLogin] Playwright-Fallback fehlgeschlagen:', playwrightResult.error);
+          const isSetupError = !!playwrightResult.requiresSetup || playwrightResult.status === 503;
           effectiveLoginResult = {
             success: false,
             error: playwrightResult.error || 'Playwright-Fallback fehlgeschlagen',
-            requiresCaptcha: true,
-            status: 400
+            requiresCaptcha: !isSetupError,
+            status: isSetupError ? 503 : 400
           };
         }
       } catch (playwrightError) {
         console.warn('[myTischtennisService.verifyLogin] Playwright-Fallback Exception:', playwrightError?.message || playwrightError);
+        const rawMessage = String(playwrightError?.message || playwrightError || '');
+        const isSetupError = /Executable doesn't exist|download new browsers|playwright install/i.test(rawMessage);
         effectiveLoginResult = {
           success: false,
-          error: `Playwright-Fallback Exception: ${playwrightError?.message || 'Unbekannter Fehler'}`,
-          requiresCaptcha: true,
-          status: 400
+          error: isSetupError
+            ? 'Playwright-Browser ist auf dem Server nicht installiert. Bitte "npx playwright install chromium" ausführen.'
+            : `Playwright-Fallback Exception: ${playwrightError?.message || 'Unbekannter Fehler'}`,
+          requiresCaptcha: !isSetupError,
+          status: isSetupError ? 503 : 400
         };
       }
     }

frontend/src/components/MyTischtennisDialog.vue

@@ -170,9 +170,14 @@ export default {
       this.error = null;
       this.saving = true;
       try {
-        await apiClient.post('/mytischtennis/verify', {
+        const response = await apiClient.post('/mytischtennis/verify', {
           password: this.formData.password
         });
+        if (response.status >= 400 || response?.data?.success === false) {
+          const requestError = new Error('myTischtennis verify failed');
+          requestError.response = response;
+          throw requestError;
+        }
         this.$emit('logged-in');
       } catch (error) {
         console.error('Fehler beim Login:', error);
@@ -203,7 +208,12 @@ export default {
           payload.userPassword = this.formData.userPassword;
         }
         
-        await apiClient.post('/mytischtennis/account', payload);
+        const response = await apiClient.post('/mytischtennis/account', payload);
+        if (response.status >= 400 || response?.data?.success === false) {
+          const requestError = new Error('myTischtennis account save failed');
+          requestError.response = response;
+          throw requestError;
+        }
         this.$emit('saved');
       } catch (error) {
         console.error('Fehler beim Speichern:', error);

frontend/src/views/MyTischtennisAccount.vue

@@ -233,7 +233,12 @@ export default {
       };
       try {
         // 1-Klick-Re-Login: zuerst gespeicherte Session/Passwort serverseitig verwenden
-        await apiClient.post('/mytischtennis/verify', {});
+        const response = await apiClient.post('/mytischtennis/verify', {});
+        if (response.status >= 400 || response?.data?.success === false) {
+          const requestError = new Error('myTischtennis verify failed');
+          requestError.response = response;
+          throw requestError;
+        }
         await this.loadAccount();
         this.loginFeedback = {
           type: 'success',