feat(dashboard): add logs page, pagination, quick mapping modal, price pre-validation

- Add /logs page with per-order sync run details, filters (Toate/Importate/Fara Mapare/Erori)
- Add price pre-validation (validate_prices + ensure_prices) to prevent ORA-20000 on direct articles
- Add find_new_orders() to detect orders not yet in Oracle COMENZI
- Extend missing_skus table with order context (order_count, order_numbers, customers)
- Add server-side pagination on /api/validate/missing-skus and /missing-skus page
- Replace confusing "Skip"/"Err" with "Fara Mapare"/"Erori" terminology
- Add inline mapping modal on dashboard (replaces navigation to /mappings)
- Add 2-row stat cards: orders (Comenzi Noi/Ready/Importate/Fara Mapare/Erori) + articles
- Add ID_POL/ID_GESTIUNE/ID_SECTIE to config.py and .env
- Update .gitignore (venv, *.db, api/api/, logs/)
- 33/33 unit tests pass, E2E verified with Playwright

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

api/app/database.py

@@ -91,7 +91,10 @@ CREATE TABLE IF NOT EXISTS missing_skus (
     product_name    TEXT,
     first_seen      TEXT DEFAULT (datetime('now')),
     resolved        INTEGER DEFAULT 0,
-    resolved_at     TEXT
+    resolved_at     TEXT,
+    order_count     INTEGER DEFAULT 0,
+    order_numbers   TEXT,
+    customers       TEXT
 );
 
 CREATE TABLE IF NOT EXISTS scheduler_config (
@@ -115,6 +118,21 @@ def init_sqlite():
     # Create tables synchronously
     conn = sqlite3.connect(_sqlite_db_path)
     conn.executescript(SQLITE_SCHEMA)
+
+    # Migrate: add columns if missing (for existing databases)
+    try:
+        cursor = conn.execute("PRAGMA table_info(missing_skus)")
+        cols = {row[1] for row in cursor.fetchall()}
+        for col, typedef in [("order_count", "INTEGER DEFAULT 0"),
+                             ("order_numbers", "TEXT"),
+                             ("customers", "TEXT")]:
+            if col not in cols:
+                conn.execute(f"ALTER TABLE missing_skus ADD COLUMN {col} {typedef}")
+                logger.info(f"Migrated missing_skus: added column {col}")
+        conn.commit()
+    except Exception as e:
+        logger.warning(f"Migration check failed: {e}")
+
     conn.close()
     logger.info(f"SQLite initialized: {_sqlite_db_path}")