Store config in user state and clean old release notes

internal/appstate/path.go

@@ -11,8 +11,10 @@ import (
 const (
 	appDirName  = "QuoteForge"
 	defaultDB   = "qfs.db"
+	defaultCfg  = "config.yaml"
 	envDBPath   = "QFS_DB_PATH"
 	envStateDir = "QFS_STATE_DIR"
+	envCfgPath  = "QFS_CONFIG_PATH"
 )
 
 // ResolveDBPath returns the local SQLite path using priority:
@@ -34,6 +36,25 @@ func ResolveDBPath(explicitPath string) (string, error) {
 	return filepath.Join(dir, defaultDB), nil
 }
 
+// ResolveConfigPath returns the config path using priority:
+// explicit CLI path > QFS_CONFIG_PATH > OS-specific user state directory.
+func ResolveConfigPath(explicitPath string) (string, error) {
+	if explicitPath != "" {
+		return filepath.Clean(explicitPath), nil
+	}
+
+	if fromEnv := os.Getenv(envCfgPath); fromEnv != "" {
+		return filepath.Clean(fromEnv), nil
+	}
+
+	dir, err := defaultStateDir()
+	if err != nil {
+		return "", err
+	}
+
+	return filepath.Join(dir, defaultCfg), nil
+}
+
 // MigrateLegacyDB copies an existing legacy DB (and optional SQLite sidecars)
 // to targetPath if targetPath does not already exist.
 // Returns source path if migration happened.
@@ -73,6 +94,38 @@ func MigrateLegacyDB(targetPath string, legacyPaths []string) (string, error) {
 	return "", nil
 }
 
+// MigrateLegacyFile copies an existing legacy file to targetPath
+// if targetPath does not already exist.
+func MigrateLegacyFile(targetPath string, legacyPaths []string) (string, error) {
+	if targetPath == "" {
+		return "", nil
+	}
+
+	if exists(targetPath) {
+		return "", nil
+	}
+
+	if err := os.MkdirAll(filepath.Dir(targetPath), 0755); err != nil {
+		return "", fmt.Errorf("creating target directory: %w", err)
+	}
+
+	for _, src := range legacyPaths {
+		if src == "" {
+			continue
+		}
+		src = filepath.Clean(src)
+		if src == targetPath || !exists(src) {
+			continue
+		}
+		if err := copyFile(src, targetPath); err != nil {
+			return "", fmt.Errorf("migrating legacy file from %s: %w", src, err)
+		}
+		return src, nil
+	}
+
+	return "", nil
+}
+
 func defaultStateDir() (string, error) {
 	if override := os.Getenv(envStateDir); override != "" {
 		return filepath.Clean(override), nil