feat: refactor error handling and output formatting (#158)

- Remove unused "fmt" import from commit.go
- Change error handling to display a message in red without exiting the function
- Add a condition to set `summaryPrix` based on `msg.Content` if no tool calls are found in the message

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

Author: appleboy

cmd/commit.go

@@ -1,7 +1,6 @@
 package cmd
 
 import (
-	"fmt"
 	"html"
 	"log"
 	"os"
@@ -218,12 +217,13 @@ var commitCmd = &cobra.Command{
 
 				msg := resp.Choices[0].Message
 				if len(msg.ToolCalls) == 0 {
-					return fmt.Errorf("current model doesn't support function call")
+					color.Red("No tool calls found in the message")
+					summaryPrix = msg.Content
+				} else {
+					args := openai.GetSummaryPrefixArgs(msg.ToolCalls[len(msg.ToolCalls)-1].Function.Arguments)
+					summaryPrix = args.Prefix
 				}
 
-				args := openai.GetSummaryPrefixArgs(msg.ToolCalls[len(msg.ToolCalls)-1].Function.Arguments)
-				summaryPrix = args.Prefix
-
 				color.Magenta("PromptTokens: " + strconv.Itoa(resp.Usage.PromptTokens) +
 					", CompletionTokens: " + strconv.Itoa(resp.Usage.CompletionTokens) +
 					", TotalTokens: " + strconv.Itoa(resp.Usage.TotalTokens),