From c42012aacaa9c15ce7e9c0f183ead07af8b4e87a Mon Sep 17 00:00:00 2001
From: PhotoPortfolio Developer <developer@photportfolio.local>
Date: Fri, 20 Feb 2026 20:42:47 +0800
Subject: [PATCH] Backward compatibility: derive unified search config from
 legacy sections.

---
 pkg/config/config.go | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/pkg/config/config.go b/pkg/config/config.go
index 939ca2cda..855c9de94 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -481,6 +481,23 @@ func LoadConfig(path string) (*Config, error) {
 		return nil, err
 	}
 
+	// Backward compatibility: derive unified search config from legacy sections.
+	if strings.TrimSpace(cfg.Tools.Web.Search.Provider) == "" {
+		switch {
+		case cfg.Tools.Web.Brave.Enabled:
+			cfg.Tools.Web.Search.Provider = "brave"
+			cfg.Tools.Web.Search.APIKey = cfg.Tools.Web.Brave.APIKey
+			cfg.Tools.Web.Search.MaxResults = cfg.Tools.Web.Brave.MaxResults
+		case cfg.Tools.Web.Perplexity.Enabled:
+			cfg.Tools.Web.Search.Provider = "perplexity"
+			cfg.Tools.Web.Search.APIKey = cfg.Tools.Web.Perplexity.APIKey
+			cfg.Tools.Web.Search.MaxResults = cfg.Tools.Web.Perplexity.MaxResults
+		case cfg.Tools.Web.DuckDuckGo.Enabled:
+			cfg.Tools.Web.Search.Provider = "duckduckgo"
+			cfg.Tools.Web.Search.MaxResults = cfg.Tools.Web.DuckDuckGo.MaxResults
+		}
+	}
+
 	if strings.TrimSpace(cfg.Tools.Web.Search.Provider) == "" {
 		return nil, fmt.Errorf("Please check new config for web search as config example")
 	}