feat: add FastAPI admin dashboard with sync orchestration and test suite

Replace Flask admin with FastAPI app (api/app/) featuring:
- Dashboard with stat cards, sync control, and history
- Mappings CRUD for ARTICOLE_TERTI with CSV import/export
- Article autocomplete from NOM_ARTICOLE
- SKU pre-validation before import
- Sync orchestration: read JSONs -> validate -> import -> log to SQLite
- APScheduler for periodic sync from UI
- File logging to logs/sync_comenzi_YYYYMMDD_HHMMSS.log
- Oracle pool None guard (503 vs 500 on unavailable)

Test suite:
- test_app_basic.py: 30 tests (imports + routes) without Oracle
- test_integration.py: 9 integration tests with Oracle

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

CLAUDE.md

@@ -6,13 +6,13 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 **System:** Import Comenzi Web → Sistem ROA Oracle
 
-This is a multi-tier system that automatically imports orders from web platforms (GoMag, etc.) into the ROA Oracle ERP system. The project combines Oracle PL/SQL packages, Visual FoxPro orchestration, and a Flask web admin interface for SKU mapping management.
+This is a multi-tier system that automatically imports orders from web platforms (GoMag, etc.) into the ROA Oracle ERP system. The project combines Oracle PL/SQL packages, Visual FoxPro orchestration, and a FastAPI web admin/dashboard interface.
 
-**Current Status:** Phase 1 (Database Foundation) - 75% Complete
-- ✅ P1-001: ARTICOLE_TERTI table created
-- ✅ P1-002: IMPORT_PARTENERI package complete
-- ✅ P1-003: IMPORT_COMENZI package complete
-- 🔄 P1-004: Manual testing packages (NEXT UP)
+**Current Status:** Phase 4 Complete, Phase 5 In Progress
+- ✅ Phase 1: Database Foundation (ARTICOLE_TERTI, IMPORT_PARTENERI, IMPORT_COMENZI)
+- ✅ Phase 2: VFP Integration (gomag-vending.prg, sync-comenzi-web.prg)
+- ✅ Phase 3-4: FastAPI Admin + Dashboard (mappings CRUD, sync orchestration, pre-validation)
+- 🔄 Phase 5: Production (file logging done, auth + notifications pending)
 
 ## Architecture
 
@@ -25,8 +25,8 @@ This is a multi-tier system that automatically imports orders from web platforms
 ### Tech Stack
 - **Backend:** Oracle PL/SQL packages
 - **Integration:** Visual FoxPro 9
-- **Admin Interface:** Flask + Oracle connection pool
-- **Data:** Oracle 11g/12c (ROA system)
+- **Admin/Dashboard:** FastAPI + Jinja2 + Oracle pool + SQLite
+- **Data:** Oracle 11g/12c (ROA system), SQLite (local tracking)
 
 ## Core Components
 
@@ -87,15 +87,18 @@ CREATE TABLE ARTICOLE_TERTI (
 );
 ```
 
-### Flask Admin Interface
+### FastAPI Admin/Dashboard
 
-#### admin.py
-**Location:** `api/admin.py`
+#### app/main.py
+**Location:** `api/app/main.py`
 **Features:**
-- Oracle connection pool management
-- SKU mappings CRUD operations
-- Web interface for configuration
-- Real-time validation
+- FastAPI with lifespan (Oracle pool + SQLite init)
+- File logging to `logs/sync_comenzi_YYYYMMDD_HHMMSS.log`
+- Routers: health, dashboard, mappings, articles, validation, sync
+- Services: mapping, article, import, sync, validation, order_reader, sqlite, scheduler
+- Templates: Jinja2 (dashboard, mappings, sync_detail, missing_skus)
+- Dual database: Oracle (ERP data) + SQLite (tracking)
+- APScheduler for periodic sync
 
 ## Development Commands
 
@@ -115,10 +118,17 @@ sqlplus CONTAFIN_ORACLE/password@ROA_ROMFAST @03_import_comenzi.sql
 DO vfp/gomag-vending.prg
 ```
 
-### Flask Admin Interface
+### FastAPI Admin/Dashboard
 ```bash
 cd api
-python admin.py
+pip install -r requirements.txt
+uvicorn app.main:app --host 0.0.0.0 --port 5003 --reload
+```
+
+### Testare
+```bash
+python api/test_app_basic.py       # Test A - fara Oracle
+python api/test_integration.py     # Test C - cu Oracle
 ```
 
 ## Project Structure