feat(playback): Add right-alignment for user messages

- Refactor the 'printContent' function to align user messages to
  the right side of the terminal.
- Gemini messages remain left-aligned.
- This provides a clearer visual distinction in the conversation flow.

prettyFormat.go

@@ -56,14 +56,21 @@ func prettyFormatChat(chat *chatpb.Chat) {
 
 // printContent handles the wrapping for the main conversational text.
 func printContent(author, timestamp, content string) {
+	// Right-align USER messages, left-align GEMINI messages.
+	if author == "USER" {
+		printRightAligned(author, timestamp, content)
+	} else {
+		printLeftAligned(author, timestamp, content)
+	}
+}
+
+func printLeftAligned(author, timestamp, content string) {
 	prefix := fmt.Sprintf("✦ %s (%s):", author, timestamp)
 	fmt.Println(prefix)
 
 	indent := "\t"
-	// The available width for text on each line.
 	contentWidth := termWidth - 8 // 8 spaces for a standard tab
 
-	// Process each paragraph separately to preserve empty lines between them.
 	paragraphs := strings.Split(content, "\n")
 
 	for _, paragraph := range paragraphs {
@@ -73,25 +80,62 @@ func printContent(author, timestamp, content string) {
 			continue
 		}
 
-		// Start the first line of the paragraph.
 		currentLine := indent + words[0]
-
 		for _, word := range words[1:] {
-			// If the next word fits, add it.
 			if len(currentLine)+1+len(word) <= contentWidth {
 				currentLine += " " + word
 			} else {
-				// The word doesn't fit, so print the completed line.
 				fmt.Println(currentLine)
-				// Start a new line with the word that didn't fit.
 				currentLine = indent + word
 			}
 		}
-		// Print the last remaining line of the paragraph.
 		fmt.Println(currentLine)
 	}
 }
 
+func printRightAligned(author, timestamp, content string) {
+	prefix := fmt.Sprintf(":(%s) %s ✦", timestamp, author)
+	
+	// The available width for the text.
+	contentWidth := termWidth - 8 // Leave a tab's worth of margin on the left
+
+	lines := strings.Split(content, "\n")
+	var formattedLines []string
+
+	// First, wrap all the text into lines of the correct width.
+	for _, line := range lines {
+		words := strings.Fields(line)
+		if len(words) == 0 {
+			formattedLines = append(formattedLines, "")
+			continue
+		}
+		currentLine := words[0]
+		for _, word := range words[1:] {
+			if len(currentLine)+1+len(word) <= contentWidth {
+				currentLine += " " + word
+			} else {
+				formattedLines = append(formattedLines, currentLine)
+				currentLine = word
+			}
+		}
+		formattedLines = append(formattedLines, currentLine)
+	}
+
+	// Now, print the formatted lines with the correct right alignment.
+	// The prefix is printed last and right-aligned.
+	for i, line := range formattedLines {
+		padding := termWidth - len(line)
+		if i == len(formattedLines)-1 { // Last line gets the prefix
+			padding = termWidth - len(line) - len(prefix)
+		}
+		if padding < 0 {
+			padding = 0
+		}
+		fmt.Printf("%s%s\n", strings.Repeat(" ", padding), line)
+	}
+	fmt.Printf("%*s\n", termWidth, prefix)
+}
+
 func printTable(table *chatpb.Table) {
 	if table == nil || len(table.GetRows()) == 0 {
 		return