feat: add Buchhaltung data reset (Transaktionen, Konten, Bankkonten) to admin DataManagementTab

backend/src/routes/admin.routes.ts

@@ -241,6 +241,9 @@ const CLEANUP_TARGETS: Record<CleanupTarget, (days: number, confirm: boolean) =>
 router.delete('/cleanup/reset-bestellungen', authenticate, requirePermission('admin:write'), (req, res) => { req.params.resetTarget = 'reset-bestellungen'; return resetHandler(req, res); });
 router.delete('/cleanup/reset-ausruestung-anfragen', authenticate, requirePermission('admin:write'), (req, res) => { req.params.resetTarget = 'reset-ausruestung-anfragen'; return resetHandler(req, res); });
 router.delete('/cleanup/reset-issues', authenticate, requirePermission('admin:write'), (req, res) => { req.params.resetTarget = 'reset-issues'; return resetHandler(req, res); });
+router.delete('/cleanup/reset-buchhaltung-transaktionen', authenticate, requirePermission('admin:write'), (req, res) => { req.params.resetTarget = 'reset-buchhaltung-transaktionen'; return resetHandler(req, res); });
+router.delete('/cleanup/reset-buchhaltung-konten', authenticate, requirePermission('admin:write'), (req, res) => { req.params.resetTarget = 'reset-buchhaltung-konten'; return resetHandler(req, res); });
+router.delete('/cleanup/reset-buchhaltung-bankkonten', authenticate, requirePermission('admin:write'), (req, res) => { req.params.resetTarget = 'reset-buchhaltung-bankkonten'; return resetHandler(req, res); });
 router.delete('/cleanup/reset-checklist-history', authenticate, requirePermission('admin:write'), (req, res) => { req.params.resetTarget = 'reset-checklist-history'; return resetHandler(req, res); });
 router.delete('/cleanup/issues-all', authenticate, requirePermission('admin:write'), (req, res) => { req.params.resetTarget = 'issues-all'; return resetHandler(req, res); });
 
@@ -277,11 +280,14 @@ router.delete(
 // ---------------------------------------------------------------------------
 
 const RESET_TARGETS: Record<string, (confirm: boolean) => Promise<{ count: number; deleted: boolean }>> = {
-  'reset-bestellungen':          (c) => cleanupService.resetBestellungenSequence(c),
+  'reset-bestellungen':                  (c) => cleanupService.resetBestellungenSequence(c),
-  'reset-ausruestung-anfragen':  (c) => cleanupService.resetAusruestungAnfragenSequence(c),
+  'reset-ausruestung-anfragen':          (c) => cleanupService.resetAusruestungAnfragenSequence(c),
-  'reset-issues':                (c) => cleanupService.resetIssuesSequence(c),
+  'reset-issues':                        (c) => cleanupService.resetIssuesSequence(c),
-  'issues-all':                  (c) => cleanupService.resetIssuesSequence(c),
+  'issues-all':                          (c) => cleanupService.resetIssuesSequence(c),
-  'reset-checklist-history':     (c) => cleanupService.resetChecklistHistory(c),
+  'reset-checklist-history':             (c) => cleanupService.resetChecklistHistory(c),
+  'reset-buchhaltung-transaktionen':     (c) => cleanupService.resetBuchhaltungTransaktionen(c),
+  'reset-buchhaltung-konten':            (c) => cleanupService.resetBuchhaltungKonten(c),
+  'reset-buchhaltung-bankkonten':        (c) => cleanupService.resetBuchhaltungBankkonten(c),
 };
 
 const resetHandler = async (req: Request, res: Response): Promise<void> => {

backend/src/services/cleanup.service.ts

@@ -197,6 +197,47 @@ class CleanupService {
     logger.info(`Cleanup: truncated issues (${count} rows) and reset sequence`);
     return { count, deleted: true };
   }
+
+  async resetBuchhaltungTransaktionen(confirm: boolean): Promise<CleanupResult> {
+    if (!confirm) {
+      const { rows } = await pool.query('SELECT COUNT(*)::int AS count FROM buchhaltung_transaktionen');
+      return { count: rows[0].count, deleted: false };
+    }
+    const { rows } = await pool.query('SELECT COUNT(*)::int AS count FROM buchhaltung_transaktionen');
+    const count = rows[0].count;
+    await pool.query('TRUNCATE buchhaltung_transaktionen CASCADE');
+    try { await pool.query('ALTER SEQUENCE buchhaltung_transaktionen_id_seq RESTART WITH 1'); } catch { /* sequence may not exist */ }
+    logger.info(`Cleanup: truncated buchhaltung_transaktionen (${count} rows) and reset sequence`);
+    return { count, deleted: true };
+  }
+
+  async resetBuchhaltungKonten(confirm: boolean): Promise<CleanupResult> {
+    if (!confirm) {
+      const { rows } = await pool.query('SELECT COUNT(*)::int AS count FROM buchhaltung_konten');
+      return { count: rows[0].count, deleted: false };
+    }
+    const { rows } = await pool.query('SELECT COUNT(*)::int AS count FROM buchhaltung_konten');
+    const count = rows[0].count;
+    await pool.query('TRUNCATE buchhaltung_transaktionen CASCADE');
+    await pool.query('TRUNCATE buchhaltung_konten CASCADE');
+    try { await pool.query('ALTER SEQUENCE buchhaltung_konten_id_seq RESTART WITH 1'); } catch { /* sequence may not exist */ }
+    try { await pool.query('ALTER SEQUENCE buchhaltung_transaktionen_id_seq RESTART WITH 1'); } catch { /* sequence may not exist */ }
+    logger.info(`Cleanup: truncated buchhaltung_konten (${count} rows) and reset sequence`);
+    return { count, deleted: true };
+  }
+
+  async resetBuchhaltungBankkonten(confirm: boolean): Promise<CleanupResult> {
+    if (!confirm) {
+      const { rows } = await pool.query('SELECT COUNT(*)::int AS count FROM buchhaltung_bankkonten');
+      return { count: rows[0].count, deleted: false };
+    }
+    const { rows } = await pool.query('SELECT COUNT(*)::int AS count FROM buchhaltung_bankkonten');
+    const count = rows[0].count;
+    await pool.query('TRUNCATE buchhaltung_bankkonten CASCADE');
+    try { await pool.query('ALTER SEQUENCE buchhaltung_bankkonten_id_seq RESTART WITH 1'); } catch { /* sequence may not exist */ }
+    logger.info(`Cleanup: truncated buchhaltung_bankkonten (${count} rows) and reset sequence`);
+    return { count, deleted: true };
+  }
 }
 
 export default new CleanupService();

frontend/src/components/admin/DataManagementTab.tsx

@@ -38,6 +38,9 @@ const RESET_SECTIONS: ResetSection[] = [
   { key: 'reset-ausruestung-anfragen', label: 'Interne Bestellungen zuruecksetzen', description: 'Alle internen Bestellungen und zugehoerige Positionen loeschen und Nummern zuruecksetzen.' },
   { key: 'reset-issues', label: 'Issues zuruecksetzen', description: 'Alle Issues und Kommentare loeschen und Nummern zuruecksetzen.' },
   { key: 'reset-checklist-history', label: 'Checklisten-Historie zuruecksetzen', description: 'Alle Checklisten-Ausfuehrungen und Faelligkeiten loeschen und Nummern zuruecksetzen.' },
+  { key: 'reset-buchhaltung-transaktionen', label: 'Buchhaltung: Transaktionen loeschen', description: 'Alle Buchungen und Transaktionen loeschen und Nummerierung zuruecksetzen. Konten und Haushaltsjahre bleiben erhalten.' },
+  { key: 'reset-buchhaltung-konten', label: 'Buchhaltung: Konten loeschen', description: 'Alle Konten und alle zugehoerigen Transaktionen loeschen und Nummerierung zuruecksetzen. Haushaltsjahre bleiben erhalten.' },
+  { key: 'reset-buchhaltung-bankkonten', label: 'Buchhaltung: Bankkonten loeschen', description: 'Alle Bankkonten loeschen und Nummerierung zuruecksetzen.' },
 ];
 
 interface SectionState {