Use PromptKit prepared execution for structured model calls

internal/framework/llm/client_common.go

@@ -2,29 +2,9 @@ package llm
 
 import (
 	"fmt"
-	"net/http"
 	"reflect"
-	"strings"
-	"time"
 )
 
-func resolvedHTTPClient(base *http.Client, timeout time.Duration) *http.Client {
-	if base == nil {
-		if timeout <= 0 {
-			return http.DefaultClient
-		}
-		return &http.Client{Timeout: timeout}
-	}
-
-	if timeout <= 0 {
-		return base
-	}
-
-	cloned := *base
-	cloned.Timeout = timeout
-	return &cloned
-}
-
 func validateOutputTarget(out any) error {
 	if out == nil {
 		return fmt.Errorf("output target must not be nil")
@@ -35,16 +15,3 @@ func validateOutputTarget(out any) error {
 	}
 	return nil
 }
-
-func sanitizeError(err error, apiKey string) error {
-	if err == nil {
-		return nil
-	}
-	msg := err.Error()
-	key := strings.TrimSpace(apiKey)
-	if key != "" {
-		msg = strings.ReplaceAll(msg, key, "[REDACTED]")
-		msg = strings.ReplaceAll(msg, "Bearer "+key, "Bearer [REDACTED]")
-	}
-	return fmt.Errorf("%s", msg)
-}