feat: add СХД configuration type with storage-specific tabs and LOT catalog guide

- Add config_type field ("server"|"storage") to Configuration and LocalConfiguration
- Create modal: Сервер/СХД segmented control in configs.html and project_detail.html
- Configurator: ENC/DKC/CTL categories in Base tab, HIC section in PCI tab hidden for server configs
- Add SW tab (categories: SW) to configurator, visible only when components present
- TAB_CONFIG.pci: add HIC section for storage HIC adapters (separate from server HBA/NIC)
- Migration 029: ALTER TABLE qt_configurations ADD COLUMN config_type
- Fix: skip Error 1833 (Cannot change column used in FK) in GORM AutoMigrate
- Operator guide: docs/storage-components-guide.md with LOT naming rules and DE4000H catalog template

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

web/templates/index.html

@@ -108,6 +108,10 @@
                         class="tab-btn px-4 py-3 text-sm font-medium border-b-2 border-transparent text-gray-500 hover:text-gray-700 whitespace-nowrap">
                     Accessories
                 </button>
+                <button onclick="switchTab('sw')" data-tab="sw"
+                        class="tab-btn px-4 py-3 text-sm font-medium border-b-2 border-transparent text-gray-500 hover:text-gray-700 whitespace-nowrap">
+                    SW
+                </button>
                 <button onclick="switchTab('other')" data-tab="other"
                         class="tab-btn px-4 py-3 text-sm font-medium border-b-2 border-transparent text-gray-500 hover:text-gray-700 whitespace-nowrap">
                     Other
@@ -365,7 +369,7 @@
 // Tab configuration - will be populated dynamically
 let TAB_CONFIG = {
     base: {
-        categories: ['MB', 'CPU', 'MEM'],
+        categories: ['MB', 'CPU', 'MEM', 'ENC', 'DKC', 'CTL'],
         singleSelect: true,
         label: 'Base'
     },
@@ -379,13 +383,14 @@ let TAB_CONFIG = {
         ]
     },
     pci: {
-        categories: ['GPU', 'DPU', 'NIC', 'HCA', 'HBA'],
+        categories: ['GPU', 'DPU', 'NIC', 'HCA', 'HBA', 'HIC'],
         singleSelect: false,
         label: 'PCI',
         sections: [
             { title: 'GPU / DPU', categories: ['GPU', 'DPU'] },
             { title: 'NIC / HCA', categories: ['NIC', 'HCA'] },
-            { title: 'HBA', categories: ['HBA'] }
+            { title: 'HBA', categories: ['HBA'] },
+            { title: 'HIC', categories: ['HIC'] }
         ]
     },
     power: {
@@ -398,6 +403,11 @@ let TAB_CONFIG = {
         singleSelect: false,
         label: 'Accessories'
     },
+    sw: {
+        categories: ['SW'],
+        singleSelect: false,
+        label: 'SW'
+    },
     other: {
         categories: [],
         singleSelect: false,
@@ -411,6 +421,7 @@ let ASSIGNED_CATEGORIES = Object.values(TAB_CONFIG)
 
 // State
 let configUUID = '{{.ConfigUUID}}';
+let configType = 'server';
 let configName = '';
 let currentVersionNo = 1;
 let projectUUID = '';
@@ -793,6 +804,8 @@ document.addEventListener('DOMContentLoaded', async function() {
 
         const config = await resp.json();
         configName = config.name;
+        configType = config.config_type || 'server';
+        applyConfigTypeToTabs();
         currentVersionNo = config.current_version_no || 1;
         projectUUID = config.project_uuid || '';
         await loadProjectIndex();
@@ -1139,6 +1152,45 @@ function switchTab(tab) {
     renderTab();
 }
 
+const ALWAYS_VISIBLE_TABS = new Set(['base', 'storage', 'pci']);
+
+// Storage-only categories — hidden for server configs
+const STORAGE_ONLY_BASE_CATEGORIES = ['ENC', 'DKC', 'CTL'];
+
+function applyConfigTypeToTabs() {
+    if (configType === 'storage') return; // storage sees everything
+    // Remove ENC/DKC/CTL from Base
+    TAB_CONFIG.base.categories = TAB_CONFIG.base.categories.filter(
+        c => !STORAGE_ONLY_BASE_CATEGORIES.includes(c)
+    );
+    // Remove HIC from PCI tab
+    TAB_CONFIG.pci.categories = TAB_CONFIG.pci.categories.filter(c => c !== 'HIC');
+    TAB_CONFIG.pci.sections = TAB_CONFIG.pci.sections.filter(s => s.title !== 'HIC');
+    // Rebuild assigned categories index
+    ASSIGNED_CATEGORIES = Object.values(TAB_CONFIG)
+        .flatMap(t => t.categories)
+        .map(c => c.toUpperCase());
+}
+
+function updateTabVisibility() {
+    for (const tabId of Object.keys(TAB_CONFIG)) {
+        if (ALWAYS_VISIBLE_TABS.has(tabId)) continue;
+        const btn = document.querySelector(`[data-tab="${tabId}"]`);
+        if (!btn) continue;
+        const hasComponents = getComponentsForTab(tabId).length > 0;
+        const hasCartItems = cart.some(item => {
+            const cat = (item.category || getCategoryFromLotName(item.lot_name) || '').toUpperCase();
+            return getTabForCategory(cat) === tabId;
+        });
+        const visible = hasComponents || hasCartItems;
+        btn.classList.toggle('hidden', !visible);
+        // If the current tab just got hidden, fall back to base
+        if (!visible && currentTab === tabId) {
+            switchTab('base');
+        }
+    }
+}
+
 function getComponentsForTab(tab) {
     const config = TAB_CONFIG[tab];
     return allComponents.filter(comp => {
@@ -1870,12 +1922,14 @@ function updateMultiQuantity(lotName, value) {
 
 function removeFromCart(lotName) {
     cart = cart.filter(i => i.lot_name !== lotName);
+    updateTabVisibility();
     renderTab();
     updateCartUI();
     triggerAutoSave();
 }
 
 function updateCartUI() {
+    updateTabVisibility();
     window._currentCart = cart; // expose for BOM/Pricing tabs
     const total = cart.reduce((sum, item) => sum + (getDisplayPrice(item) * item.quantity), 0);
     document.getElementById('cart-total').textContent = formatMoney(total);