fix qr decoding, spool edit dialog, and opus 5 token budget

claude/claude.go

@@ -161,8 +161,8 @@ func readOnce(img image.Image, auth Auth) (float64, string, string, error) {
 	b64 := base64.StdEncoding.EncodeToString(buf.Bytes())
 
 	reqBody := map[string]interface{}{
-		"model":      "claude-opus-4-8",
-		"max_tokens": 600,
+		"model":      "claude-opus-5",
+		"max_tokens": 4000,
 		"messages": []map[string]interface{}{{
 			"role": "user",
 			"content": []map[string]interface{}{
@@ -185,7 +185,9 @@ func readOnce(img image.Image, auth Auth) (float64, string, string, error) {
 	req.Header.Set("anthropic-version", "2023-06-01")
 	auth.apply(req)
 
+	endPost := trace("claude.post")
 	resp, err := (&http.Client{Timeout: 90 * time.Second}).Do(req)
+	endPost()
 	if err != nil {
 		return 0, "", "", err
 	}
@@ -196,15 +198,28 @@ func readOnce(img image.Image, auth Auth) (float64, string, string, error) {
 	}
 	var parsed struct {
 		Content []struct {
+			Type string `json:"type"`
 			Text string `json:"text"`
 		} `json:"content"`
+		StopReason string `json:"stop_reason"`
+		Usage      struct {
+			OutputTokens int `json:"output_tokens"`
+		} `json:"usage"`
 	}
 	if err := json.Unmarshal(respBody, &parsed); err != nil {
 		return 0, "", "", err
 	}
 	var text string
+	var blocks []string
 	for _, c := range parsed.Content {
 		text += c.Text
+		blocks = append(blocks, c.Type)
+	}
+	slog.Debug("claude reply", "stopReason", parsed.StopReason,
+		"blocks", strings.Join(blocks, ","), "outputTokens", parsed.Usage.OutputTokens)
+	if strings.TrimSpace(text) == "" {
+		return 0, "", "", fmt.Errorf("empty reply (stopReason %q, blocks %q, outputTokens %d)",
+			parsed.StopReason, strings.Join(blocks, ","), parsed.Usage.OutputTokens)
 	}
 	var wr struct {
 		Weight     float64 `json:"weight"`