Server-side, per-user chat history (the thread now survives reload):
- new ai_chat_messages table + migration; getChatHistory/appendChatMessages/
clearChatHistory; GET/POST/DELETE /api/admin/ai/history (ai.use-guarded);
service + HTTP tests (isolation, ordering, clear, perm, validation).
- DashAssistant loads the thread on mount and persists each turn; "Vymazat"
clears it. gcTime:0 so each mount re-reads the DB (no stale-cache resurrection);
composer gated until history settles + seed flag flipped on submit (no
seed/submit race clobbering a freshly-sent turn).
UX + correctness fixes from review/feedback:
- review cards moved OUT of the scrollable thread into a "Faktury k potvrzení"
section so Uložit is always reachable; chat auto-scroll no longer fires on
field edits.
- chat bubble text colour set on the Typography (GlobalStyles pins `p` to
text.secondary, which was overriding the inherited bubble colour → unreadable).
- never clear input/staged PDFs on a failed submit (rollback + keep), so a
budget error can't wipe staged invoices; roll back the optimistic user turn.
- stable attachment ids (no crypto.randomUUID — undefined over plain HTTP).
- editable Datum splatnosti + Popis fields; client-side extraction summary.
Security: DashProfile clipboard copy now uses an execCommand fallback (works
over plain HTTP) and only shows the success toast when the copy actually
succeeded — previously it falsely claimed to copy 2FA codes / the TOTP secret.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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