Add Phase 2: Local SQLite database with sync functionality

Implements complete offline-first architecture with SQLite caching and MariaDB synchronization.

Key features:
- Local SQLite database for offline operation (data/quoteforge.db)
- Connection settings with encrypted credentials
- Component and pricelist caching with auto-sync
- Sync API endpoints (/api/sync/status, /components, /pricelists, /all)
- Real-time sync status indicator in UI with auto-refresh
- Offline mode detection middleware
- Migration tool for database initialization
- Setup wizard for initial configuration

New components:
- internal/localdb: SQLite repository layer (components, pricelists, sync)
- internal/services/sync: Synchronization service
- internal/handlers/sync: Sync API handlers
- internal/handlers/setup: Setup wizard handlers
- internal/middleware/offline: Offline detection
- cmd/migrate: Database migration tool

UI improvements:
- Setup page for database configuration
- Sync status indicator with online/offline detection
- Warning icons for pending synchronization
- Auto-refresh every 30 seconds

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

web/templates/index.html

@@ -269,9 +269,8 @@ async function loadCategoriesFromAPI() {
 
 // Initialize
 document.addEventListener('DOMContentLoaded', async function() {
-    const token = localStorage.getItem('token');
-
-    if (!token || !configUUID) {
+    // RBAC disabled - no token check required
+    if (!configUUID) {
         window.location.href = '/configs';
         return;
     }
@@ -280,16 +279,9 @@ document.addEventListener('DOMContentLoaded', async function() {
     await loadCategoriesFromAPI();
 
     try {
-        const resp = await fetch('/api/configs/' + configUUID, {
-            headers: {'Authorization': 'Bearer ' + token}
-        });
+        const resp = await fetch('/api/configs/' + configUUID);
 
-        if (resp.status === 401) {
-            window.location.href = '/login';
-            return;
-        }
-
-        if (resp.status === 403 || resp.status === 404) {
+        if (resp.status === 404) {
             showToast('Конфигурация не найдена', 'error');
             window.location.href = '/configs';
             return;
@@ -1119,8 +1111,8 @@ function triggerAutoSave() {
 }
 
 async function saveConfig(showNotification = true) {
-    const token = localStorage.getItem('token');
-    if (!token || !configUUID) return;
+    // RBAC disabled - no token check required
+    if (!configUUID) return;
 
     // Get custom price if set
     const customPriceInput = document.getElementById('custom-price-input');
@@ -1134,7 +1126,6 @@ async function saveConfig(showNotification = true) {
         const resp = await fetch('/api/configs/' + configUUID, {
             method: 'PUT',
             headers: {
-                'Authorization': 'Bearer ' + token,
                 'Content-Type': 'application/json'
             },
             body: JSON.stringify({
@@ -1146,11 +1137,6 @@ async function saveConfig(showNotification = true) {
             })
         });
 
-        if (resp.status === 401) {
-            window.location.href = '/login';
-            return;
-        }
-
         if (!resp.ok) {
             if (showNotification) {
                 showToast('Ошибка сохранения', 'error');
@@ -1308,23 +1294,17 @@ async function exportCSVWithCustomPrice() {
 }
 
 async function refreshPrices() {
-    const token = localStorage.getItem('token');
-    if (!token || !configUUID) return;
+    // RBAC disabled - no token check required
+    if (!configUUID) return;
 
     try {
         const resp = await fetch('/api/configs/' + configUUID + '/refresh-prices', {
             method: 'POST',
             headers: {
-                'Authorization': 'Bearer ' + token,
                 'Content-Type': 'application/json'
             }
         });
 
-        if (resp.status === 401) {
-            window.location.href = '/login';
-            return;
-        }
-
         if (!resp.ok) {
             showToast('Ошибка обновления цен', 'error');
             return;