feat: add logging, marketplace, and admin enhancements

Database & Migrations:
- Add application_logs table migration for hybrid cloud logging
- Add companies table migration and restructure vendor relationships

Logging System:
- Implement hybrid logging system (database + file)
- Add log_service for centralized log management
- Create admin logs page with filtering and viewing capabilities
- Add init_log_settings.py script for log configuration
- Enhance core logging with database integration

Marketplace Integration:
- Add marketplace admin page with product management
- Create marketplace vendor page with product listings
- Implement marketplace.js for both admin and vendor interfaces
- Add marketplace integration documentation

Admin Enhancements:
- Add imports management page and functionality
- Create settings page for admin configuration
- Add vendor themes management page
- Enhance vendor detail and edit pages
- Improve code quality dashboard and violation details
- Add logs viewing and management
- Update icons guide and shared icon system

Architecture & Documentation:
- Document frontend structure and component architecture
- Document models structure and relationships
- Add vendor-in-token architecture documentation
- Add vendor RBAC (role-based access control) documentation
- Document marketplace integration patterns
- Update architecture patterns documentation

Infrastructure:
- Add platform static files structure (css, img, js)
- Move architecture_scan.py to proper models location
- Update model imports and registrations
- Enhance exception handling
- Update dependency injection patterns

UI/UX:
- Improve vendor edit interface
- Update admin user interface
- Enhance page templates documentation
- Add vendor marketplace interface

static/admin/js/vendor-themes.js

@@ -0,0 +1,65 @@
+// static/admin/js/vendor-themes.js
+/**
+ * Admin vendor themes selection page
+ */
+
+console.log('[ADMIN VENDOR THEMES] Loading...');
+
+function adminVendorThemes() {
+    console.log('[ADMIN VENDOR THEMES] adminVendorThemes() called');
+
+    return {
+        // Inherit base layout state
+        ...data(),
+
+        // Set page identifier
+        currentPage: 'vendor-theme',
+
+        // State
+        loading: false,
+        error: '',
+        vendors: [],
+        selectedVendorCode: '',
+
+        async init() {
+            // Guard against multiple initialization
+            if (window._adminVendorThemesInitialized) {
+                return;
+            }
+            window._adminVendorThemesInitialized = true;
+
+            // Call parent init first
+            const parentInit = data().init;
+            if (parentInit) {
+                await parentInit.call(this);
+            }
+
+            await this.loadVendors();
+        },
+
+        async loadVendors() {
+            this.loading = true;
+            this.error = '';
+
+            try {
+                const response = await apiClient.get('/admin/vendors?limit=1000');
+                this.vendors = response.vendors || [];
+                console.log('[ADMIN VENDOR THEMES] Loaded vendors:', this.vendors.length);
+            } catch (error) {
+                console.error('[ADMIN VENDOR THEMES] Failed to load vendors:', error);
+                this.error = error.message || 'Failed to load vendors';
+            } finally {
+                this.loading = false;
+            }
+        },
+
+        navigateToTheme() {
+            if (!this.selectedVendorCode) {
+                return;
+            }
+            window.location.href = `/admin/vendors/${this.selectedVendorCode}/theme`;
+        }
+    };
+}
+
+console.log('[ADMIN VENDOR THEMES] Module loaded');