fix(doctor): report config parse errors, remove redundant error in Execute

Doctor now checks configErr and emits a FAIL with the parse error and
fix hint. Execute() no longer prints a separate error before running
doctor — the doctor output is self-contained.

cmd/doctor.go

@@ -115,6 +115,10 @@ func runDoctor(w io.Writer) bool {
 		if _, statErr := os.Stat(cfgPath); statErr != nil && !os.IsNotExist(statErr) {
 			issues = append(issues, fmt.Sprintf("Config file unreadable: %s", cfgPath))
 		}
+		if configErr != nil {
+			issues = append(issues, fmt.Sprintf("Parse error: %v", configErr))
+			issues = append(issues, "Fix with 'pda config edit' or 'pda config init --new'")
+		}
 		if unexpectedFiles(cfgDir, map[string]bool{
 			"config.toml":  true,
 			"identity.txt": true,
@@ -134,11 +138,13 @@ func runDoctor(w io.Writer) bool {
 		}
 	}
 
-	// 7. Non-default config values
+	// 7. Non-default config values (skip if config failed to parse)
-	defaults := defaultConfig()
+	if configErr == nil {
-	if diffs := configDiffStrings(configFields(&config, &defaults)); len(diffs) > 0 {
+		defaults := defaultConfig()
-		emit("ok", "Non-default config:")
+		if diffs := configDiffStrings(configFields(&config, &defaults)); len(diffs) > 0 {
-		tree(diffs)
+			emit("ok", "Non-default config:")
+			tree(diffs)
+		}
 	}
 
 	// 8. Data directory

cmd/root.go

@@ -23,7 +23,6 @@ THE SOFTWARE.
 package cmd
 
 import (
-	"fmt"
 	"os"
 
 	"github.com/spf13/cobra"
@@ -41,8 +40,6 @@ func Execute() {
 	if configErr != nil {
 		cmd, _, _ := rootCmd.Find(os.Args[1:])
 		if !configSafeCmd(cmd) {
-			printError(fmt.Errorf("cannot load config: %v", configErr))
-			fmt.Fprintln(os.Stderr)
 			infof("Running pda! doctor")
 			runDoctor(os.Stderr)
 			os.Exit(1)