add optional prefix to url

internal/markdown/renderer.go

@@ -100,6 +100,11 @@ func (r *Renderer) processObsidianImages(content string, notePath string) string
 			imageURL = fmt.Sprintf("/serve_attached_image/%s", cleanPath)
 		}
 
+		// Prefix with configured URL base
+		if bp := r.config.URLPrefix; bp != "" {
+			imageURL = bp + imageURL
+		}
+
 		// Convert to standard markdown image syntax
 		alt := filepath.Base(imagePath)
 		return fmt.Sprintf("![%s](%s)", alt, imageURL)
@@ -127,6 +132,9 @@ func (r *Renderer) processObsidianLinks(content string) string {
 		// Convert note name to URL-friendly format
 		noteURL := strings.ReplaceAll(noteName, " ", "%20")
 		noteURL = fmt.Sprintf("/note/%s.md", noteURL)
+		if bp := r.config.URLPrefix; bp != "" {
+			noteURL = bp + noteURL
+		}
 
 		// Convert to standard markdown link syntax
 		return fmt.Sprintf("[%s](%s)", displayText, noteURL)