feat: Add client extraction, amount cross-validation, and workflow fixes
OCR improvements: - Extract client data (name, CUI, address) from B2B receipts - Cross-validate amounts using payment methods and TVA entries - OCR-tolerant patterns for "TOTAL LEI" with common OCR errors - Better BON FISCAL vs CHITANTA detection Backend workflow fixes: - Fix SQLAlchemy deleted instance error in resubmit/submit workflow - Add session.refresh() after deleting accounting entries - Add unapprove endpoint (APPROVED → PENDING_REVIEW) - Add direction filter for receipt listing Frontend improvements: - Fix Vue v-else-if chain broken by Menu component - Unified OCR Preview layout with values table - Receipt list filter by direction (plati/incasari) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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