feat: P1 quick wins - useDebounce hook, DB indexy, odstraneni TCPDF

- useDebounce hook (300ms) integrovan do useListData pro debounce hledani
- useListData rozsiren o page/perPage/pagination parametry (priprava pro P2)
- Migracni SQL s indexy na attendance, invoices, quotations, refresh_tokens, audit_log
- Odstranen nepouzivany TCPDF z composer.json
- Vite build plugin: graceful handling kdyz composer neni v PATH

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

migrations/001_add_indexes.sql

@@ -0,0 +1,20 @@
+-- Indexy pro casto filtrovane sloupce
+-- Spustit rucne: mysql -u root app < migrations/001_add_indexes.sql
+
+-- Dochazka - filtrovani dle uzivatele a data smeny
+CREATE INDEX idx_attendance_user_date ON attendance(user_id, shift_date);
+
+-- Vydane faktury - filtrovani dle statusu a data vystaveni (KPI karty, seznamy)
+CREATE INDEX idx_invoices_status_issue ON invoices(status, issue_date);
+
+-- Vydane faktury - detekce po splatnosti
+CREATE INDEX idx_invoices_due_date ON invoices(due_date);
+
+-- Nabidky - razeni a vyhledavani dle cisla
+CREATE INDEX idx_quotations_number ON quotations(quotation_number);
+
+-- Refresh tokeny - cleanup a validace dle uzivatele a expirace
+CREATE INDEX idx_refresh_tokens_user_exp ON refresh_tokens(user_id, expires_at);
+
+-- Audit log - razeni a mazani starych zaznamu
+CREATE INDEX idx_audit_log_created ON audit_log(created_at);