feat: phase 2 — sauvegarde git (am sync) + transfert machine (am migrate) (closes #66 #68)

src/config.rs

@@ -130,6 +130,12 @@ pub struct Settings {
     /// CPU/memory thresholds for 'am monitor' alerts (issue #50).
     #[serde(default)]
     pub monitor_thresholds: Option<MonitorThresholds>,
+    /// Git repository where 'am sync' pushes the state (issue #66).
+    #[serde(default)]
+    pub sync_repo: Option<String>,
+    /// Push automatically when the REPL exits (issue #66, opt-in).
+    #[serde(default)]
+    pub sync_on_exit: Option<bool>,
 }
 
 /// Token price model: USD per million tokens (issue #49).
@@ -732,6 +738,18 @@ pub fn merge(base: &mut Config, overlay: Config) {
     if o.sessions_retention_days.is_some() {
         s.sessions_retention_days = o.sessions_retention_days;
     }
+    if o.cost_models.is_some() {
+        s.cost_models = o.cost_models;
+    }
+    if o.monitor_thresholds.is_some() {
+        s.monitor_thresholds = o.monitor_thresholds;
+    }
+    if o.sync_repo.is_some() {
+        s.sync_repo = o.sync_repo;
+    }
+    if o.sync_on_exit.is_some() {
+        s.sync_on_exit = o.sync_on_exit;
+    }
     for (k, v) in o.hooks {
         s.hooks.insert(k, v);
     }