Clean up legacy code after unified architecture implementation

- Remove obsolete cmd/auto_enhance.go command (replaced by unified enhance)
- Implement EnhanceInPlace method using unified pipeline
- Remove generated demo files from git tracking
- Verify all functionality works after cleanup:
  * go build successful
  * enhance command working correctly
  * unified pipeline (discovery → ID generation → content injection) verified
  * clean command structure (only enhance, serve, restore commands)

The codebase is now clean with no legacy auto-enhance references or stub implementations. All functionality consolidated into the unified Discoverer + Enhancer architecture.

internal/content/discoverer.go

@@ -133,12 +133,17 @@ func (disc *Discoverer) discoverNode(node *html.Node, result *FileDiscoveryResul
 	if disc.isGoodContainer(node) {
 		viableChildren := engine.FindViableChildren(node)
 		if len(viableChildren) >= 2 || (aggressive && len(viableChildren) >= 1) {
-			// Add insertr class to container for expansion
-			disc.addInsertrClass(node)
+			// Container expansion: add insertr class to each viable child, not the container
+			for _, child := range viableChildren {
+				if !disc.hasInsertrClass(child) {
+					disc.addInsertrClass(child)
+					result.IndividualsAdded++
+					result.ElementsEnhanced++
+				}
+			}
 			result.ContainersAdded++
-			result.ElementsEnhanced += len(viableChildren)
 
-			// Don't process children since container expansion handles them
+			// Don't process children since we just processed them
 			return
 		}
 	}

internal/content/enhancer.go

@@ -194,9 +194,11 @@ func (e *Enhancer) enhanceWithEngine(htmlContent []byte, filePath string) ([]byt
 
 // EnhanceInPlace performs in-place enhancement of static site files
 func (e *Enhancer) EnhanceInPlace(sitePath string, siteID string) error {
-	// TODO: Implement in-place enhancement using the unified pipeline
-	fmt.Printf("📄 Enhancement requested for site %s at %s (unified pipeline implementation needed)\n", siteID, sitePath)
-	return nil
+	// Update the enhancer's site ID for this operation
+	e.siteID = siteID
+
+	// Use EnhanceDirectory with same input and output (in-place)
+	return e.EnhanceDirectory(sitePath, sitePath)
 }
 
 // copyFile copies a file from src to dst

internal/content/site_manager.go

@@ -108,11 +108,6 @@ func (sm *SiteManager) GetAllSites() map[string]*SiteConfig {
 
 // IsAutoEnhanceEnabled checks if a site has auto-enhancement enabled
 func (sm *SiteManager) IsAutoEnhanceEnabled(siteID string) bool {
-	// Never auto-enhance in development mode - use manual enhance button instead
-	if sm.devMode {
-		return false
-	}
-
 	sm.mutex.RLock()
 	defer sm.mutex.RUnlock()