feat: server-driven configurator settings via qt_settings

Replaces hardcoded JS category filters and config-type buttons with
server-pushed settings synced from qt_settings (MariaDB) → local_qt_settings (SQLite).

- new table local_qt_settings (AutoMigrate) — synced after component sync
- GET /api/configurator-settings returns config_types, tab_config,
  always_visible_tabs, required_categories with hardcoded fallbacks
- new-config modal: type buttons rendered from server data (Сервер/СХД static fallback)
- configurator: TAB_CONFIG and category filter driven by server; required-category badge on tabs
- SyncQtSettings wired into SyncComponents and SyncAll handlers (non-fatal on old server)
- bible-local/server-contract-qt-settings.md — contract for server-side agent
- page titles: OFS → QFS

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

bible-local/02-architecture.md

@@ -116,6 +116,28 @@ Rules:
 - storage configurations use the same vendor_spec + PN→LOT + pricing flow as server configurations;
 - storage component categories map to existing tabs: `ENC`/`DKC`/`CTL` → Base, `HIC` → PCI (HIC-карты СХД; `HBA`/`NIC` — серверные, не смешивать), `SSD`/`HDD` → Storage (используют существующие серверные LOT), `ACC` → Accessories (используют существующие серверные LOT), `SW` → SW.
 - `DKC` = контроллерная полка (модель СХД + тип дисков + кол-во слотов + кол-во контроллеров); `CTL` = контроллер (кэш + встроенные порты); `ENC` = дисковая полка без контроллера.
+- the available config types and their localized names flow from `qt_settings.config_types` on the server;
+  QF falls back to hardcoded "server/Сервер" and "storage/СХД" when the setting is absent.
+
+## Server-driven configurator settings (`qt_settings`)
+
+QF reads four settings from `qt_settings` (MariaDB) and caches them in `local_qt_settings` (SQLite).
+They are synced during every component sync. See `bible-local/server-contract-qt-settings.md` for the
+full contract and JSON schemas.
+
+| Setting key | Effect in QF |
+|-------------|-------------|
+| `config_types` | New-config modal buttons; category allowlist per config type |
+| `tab_config` | Configurator tab structure, sections, singleSelect |
+| `always_visible_tabs` | Which tabs are shown even when empty |
+| `required_categories` | Per-config-type badge on tabs with unfilled required categories |
+
+Rules:
+- sync runs after `SyncComponents`; failure is non-fatal (Warn log only);
+- `local_qt_settings` is a read-only cache — never written by user actions;
+- absent or unparseable settings: QF uses hardcoded fallbacks for that key only;
+- `config_types[].categories` is an allowlist: a category absent from all types is shown everywhere;
+- `qt_categories.name` and `qt_categories.name_ru` are not used by QF runtime; do not depend on them.
 
 ## Vendor BOM contract