fix(js): replace console.log with centralized logger (JS-002)

Convert direct console.log/error/warn calls to use centralized logger:
- imports.js: 13 violations fixed using adminImportsLog
- vendor-themes.js: 5 violations fixed using vendorThemesLog
- code-quality-dashboard.js: 2 violations fixed using codeQualityLog
- code-quality-violations.js: 1 violation fixed using codeQualityViolationsLog
- settings.js: 1 violation fixed using settingsLog

All files now use window.LogConfig.loggers.* for consistent logging.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

static/admin/js/settings.js

@@ -31,7 +31,7 @@ function adminSettings() {
                 settingsLog.info('=== SETTINGS PAGE INITIALIZING ===');
                 await this.loadLogSettings();
             } catch (error) {
-                console.error('[Settings] Init failed:', error);
+                settingsLog.error('Init failed:', error);
                 this.error = 'Failed to initialize settings page';
             }
         },