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/test_app_basic.py

@@ -96,6 +96,9 @@ GET_ROUTES = [
     ("GET /api/sync/history",          "/api/sync/history",          [200],       False),
     ("GET /api/sync/schedule",         "/api/sync/schedule",         [200],       False),
     ("GET /api/validate/missing-skus", "/api/validate/missing-skus", [200],       False),
+    ("GET /api/validate/missing-skus?page=1", "/api/validate/missing-skus?page=1&per_page=10", [200], False),
+    ("GET /logs (HTML)",               "/logs",                      [200, 500],  False),
+    ("GET /api/sync/run/nonexistent/log", "/api/sync/run/nonexistent/log", [200, 404], False),
     ("GET /api/articles/search?q=ab",  "/api/articles/search?q=ab",  [200, 503],  True),
 ]