feat(items): optimize search, attribute filtering, and sort for items view (#4652)
BREAKING CHANGE: none
## Search & Query Optimization
- Split item search into two-phase query: Phase A resolves qualifying IDs,
Phase B joins scoped display tables for better performance and readability
- Sanitize `definition_ids` via `array_map` to prevent injection vulnerabilities
- Introduce subquery for SUM aggregation to prevent over-counting across joins
- Add validation requiring both start and end dates before applying date range filter
## Attribute Search (fixes#2919, #2722)
- Add `SHOW_IN_SEARCH` flag (value 8) to Attribute model to separate
searchability from table visibility
- Add `parse_attribute_search()` to parse syntax like `color:blue AND size:large`
- Add `applyNamedAttributeSearch()` supporting decimal and date types with
locale-aware parsing
- Support AND/OR logic for multi-attribute queries
## Sorting
- Add `get_attribute_sort_definition_id()` to detect attribute column sorting
- Join attribute tables dynamically when sorting by attribute columns
- Use `MAX()` for consistent results when sorting by attribute values
- Replace static sort column list with dynamic headers via `itemSortColumns()`
- Add `sanitizeSortColumnAttribute()` to validate attribute definition IDs as sort columns
## Tax & Data Row
- Streamline tax computation in `getItemDataRow()`
## Low Inventory Filter
- Require valid `stock_location_id` before applying low inventory filter
- Add conditional logic to sort by sum of quantities across all locations
when `stock_location_id` is invalid
## Localization
- Add `show_in_search` / `show_in_search_visibility` strings to all language files
- Translated: de-DE, es-ES, fr, it; English placeholder for remaining locales
- Unify single-quote style across all attribute language files
## Refactoring & Style
- Adopt camelCase naming throughout (variables, helpers, methods)
- Replace `sanitizeSortColumnAttribute` with reusable `sanitizeSortColumn`
from `Secure_Controller`
- Simplify column key extraction using `array_key_first`
- Apply PSR-12 formatting
## Tests
- Add tests for tax computation, quantity aggregation (single- and multi-location),
named attribute search, free-text parsing, and date/decimal type handling
- Add `ensureStockLocation` helper to auto-create missing stock locations in tests
- Refactor tests to handle config cache issues
Co-authored-by: Ollama <ollama@steganos.dev>
