Extend support bundle with comprehensive diagnostics

Add 10 new diagnostic sections to _collect_support_info(): printer
connectivity/firmware, integration status (Spoolman, MQTT, HA),
network interfaces (subnets only), Python package versions, database
health, Docker environment, WebSocket connections, and log file info.
All data properly anonymized — no IPs, names, or serials included.

frontend/src/__tests__/pages/SystemInfoPage.test.tsx

@@ -281,6 +281,28 @@ describe('SystemInfoPage', () => {
     expect(progressBars.length).toBeGreaterThan(0);
   });
 
+  it('displays extended privacy disclosure items', async () => {
+    (api.getSystemInfo as ReturnType<typeof vi.fn>).mockResolvedValue(mockSystemInfo);
+
+    render(<SystemInfoPage />);
+
+    await waitFor(() => {
+      expect(screen.getByText("What's in the support bundle?")).toBeInTheDocument();
+    });
+
+    // Original items
+    expect(screen.getByText(/App version and debug mode/)).toBeInTheDocument();
+    expect(screen.getByText(/Debug logs \(sanitized\)/)).toBeInTheDocument();
+
+    // New diagnostic items
+    expect(screen.getByText(/Printer connectivity and firmware versions/)).toBeInTheDocument();
+    expect(screen.getByText(/Integration status \(Spoolman, MQTT, HA\)/)).toBeInTheDocument();
+    expect(screen.getByText(/Network interfaces \(subnets only\)/)).toBeInTheDocument();
+    expect(screen.getByText(/Python package versions/)).toBeInTheDocument();
+    expect(screen.getByText(/Database health checks/)).toBeInTheDocument();
+    expect(screen.getByText(/Docker environment details/)).toBeInTheDocument();
+  });
+
   it('applies danger color for critical disk usage', async () => {
     const criticalDiskUsage = {
       ...mockSystemInfo,

frontend/src/i18n/locales/de.ts

@@ -1809,6 +1809,12 @@ export default {
   support: {
     debugLoggingActive: 'Debug-Protokollierung ist aktiv',
     manageLogs: 'Verwalten',
+    collectItem7: 'Drucker-Verbindungsstatus und Firmware-Versionen',
+    collectItem8: 'Integrationsstatus (Spoolman, MQTT, HA)',
+    collectItem9: 'Netzwerkschnittstellen (nur Subnetze)',
+    collectItem10: 'Python-Paketversionen',
+    collectItem11: 'Datenbankzustandsprüfungen',
+    collectItem12: 'Docker-Umgebungsdetails',
   },
 
   // File manager

frontend/src/i18n/locales/en.ts

@@ -1809,6 +1809,12 @@ export default {
   support: {
     debugLoggingActive: 'Debug logging is active',
     manageLogs: 'Manage',
+    collectItem7: 'Printer connectivity and firmware versions',
+    collectItem8: 'Integration status (Spoolman, MQTT, HA)',
+    collectItem9: 'Network interfaces (subnets only)',
+    collectItem10: 'Python package versions',
+    collectItem11: 'Database health checks',
+    collectItem12: 'Docker environment details',
   },
 
   // File manager

frontend/src/i18n/locales/ja.ts

@@ -2526,5 +2526,11 @@ export default {
   support: {
     debugLoggingActive: 'デバッグログが有効です',
     manageLogs: '管理',
+    collectItem7: 'プリンター接続状態とファームウェアバージョン',
+    collectItem8: '連携状態（Spoolman、MQTT、HA）',
+    collectItem9: 'ネットワークインターフェース（サブネットのみ）',
+    collectItem10: 'Pythonパッケージバージョン',
+    collectItem11: 'データベース健全性チェック',
+    collectItem12: 'Docker環境の詳細',
   },
 };

frontend/src/pages/SystemInfoPage.tsx

@@ -324,6 +324,12 @@ export function SystemInfoPage() {
                   <li>• {t('support.collectItem4', 'Printer models and nozzle counts')}</li>
                   <li>• {t('support.collectItem5', 'Non-sensitive settings (themes, formats)')}</li>
                   <li>• {t('support.collectItem6', 'Debug logs (sanitized)')}</li>
+                  <li>• {t('support.collectItem7', 'Printer connectivity and firmware versions')}</li>
+                  <li>• {t('support.collectItem8', 'Integration status (Spoolman, MQTT, HA)')}</li>
+                  <li>• {t('support.collectItem9', 'Network interfaces (subnets only)')}</li>
+                  <li>• {t('support.collectItem10', 'Python package versions')}</li>
+                  <li>• {t('support.collectItem11', 'Database health checks')}</li>
+                  <li>• {t('support.collectItem12', 'Docker environment details')}</li>
                 </ul>
               </div>
               <div>