init+contexte : am init genere un agent-manager.yaml selon la stack detectee + contexte projet (git root, branche, stack) attache aux evenements et sessions (issue #8)

src/sessions.rs

@@ -107,6 +107,7 @@ pub fn start_agent(
     agent: &str,
     pid: u32,
     cwd: Option<String>,
+    project: Option<String>,
     args: Vec<String>,
     env_keys: Vec<String>,
     log: Option<String>,
@@ -121,7 +122,7 @@ pub fn start_agent(
             agent: Some(agent.to_string()),
             pid: Some(pid),
             cwd,
-            project: None,
+            project,
             started_at: crate::installers::now_rfc3339(),
             ended_at: None,
             exit_code: None,
@@ -283,7 +284,7 @@ mod tests {
     #[test]
     fn agent_session_lifecycle() {
         let app = test_app("sess");
-        let id = start_agent(&app, "claude-code", 4242, Some("/tmp".into()), vec![], vec![], None).unwrap();
+        let id = start_agent(&app, "claude-code", 4242, Some("/tmp".into()), None, vec![], vec![], None).unwrap();
         let sf = load(&app).unwrap();
         let r = sf.sessions.get(&id).unwrap();
         assert_eq!(r.status, "running");
@@ -302,7 +303,7 @@ mod tests {
     #[test]
     fn reconcile_marks_dead_pid_interrupted() {
         let app = test_app("recon");
-        let id = start_agent(&app, "aider", u32::MAX - 1, None, vec![], vec![], None).unwrap();
+        let id = start_agent(&app, "aider", u32::MAX - 1, None, None, vec![], vec![], None).unwrap();
         let changed = reconcile(&app).unwrap();
         assert_eq!(changed, 1);
         let sf = load(&app).unwrap();
@@ -321,8 +322,8 @@ mod tests {
     #[test]
     fn finish_matches_by_pid_first() {
         let app = test_app("multi");
-        start_agent(&app, "jcode", 100, None, vec![], vec![], None).unwrap();
-        start_agent(&app, "jcode", 200, None, vec![], vec![], None).unwrap();
+        start_agent(&app, "jcode", 100, None, None, vec![], vec![], None).unwrap();
+        start_agent(&app, "jcode", 200, None, None, vec![], vec![], None).unwrap();
         finish_agent(&app, "jcode", Some(200), 1, false).unwrap();
         let sf = load(&app).unwrap();
         let stopped: Vec<_> = sf