merge: combine zoxide and Atuin context navigation

# Conflicts:
#	README.md
#	internal/config/config.go
#	internal/config/config_test.go
#	root/config_cmd.go
#	root/config_cmd_test.go
#	root/init.go

internal/config/config.go

@@ -83,6 +83,11 @@ type ZoxideConfig struct {
 	ExtendCd bool `toml:"extend-cd"`
 }
 
+type HistoryConfig struct {
+	// Scope controls Atuin filtering for non-empty history searches.
+	Scope string `toml:"scope"`
+}
+
 type SuggestOnEmptyConfig struct {
 	Enabled       bool `toml:"enabled"`
 	DebounceMS    int  `toml:"debounce_ms"`
@@ -130,6 +135,7 @@ type Config struct {
 	Core        CoreConfig        `toml:"core"`
 	UI          UIConfig          `toml:"ui"`
 	Git         GitConfig         `toml:"git"`
+	History     HistoryConfig     `toml:"history"`
 	Updater     UpdaterConfig     `toml:"updater"`
 	AI          AIConfig          `toml:"ai"`
 	Zoxide      ZoxideConfig      `toml:"zoxide"`
@@ -288,6 +294,11 @@ func validate(cfg *Config) error {
 		return fmt.Errorf("core.shell: invalid value %q (want: bash|zsh|fish)", cfg.Core.Shell)
 	}
 
+	validHistoryScopes := map[string]bool{"global": true, "directory": true, "workspace": true, "hybrid": true}
+	if !validHistoryScopes[cfg.History.Scope] {
+		return fmt.Errorf("history.scope: invalid value %q (want: global|directory|workspace|hybrid)", cfg.History.Scope)
+	}
+
 	validChannels := map[string]bool{"stable": true, "nightly": true}
 	if !validChannels[cfg.Updater.Channel] {
 		return fmt.Errorf("updater.channel: invalid value %q (want: stable|nightly)", cfg.Updater.Channel)