projects : am projects (agregats par depot depuis le journal) + profils de projet dans la config (issue #29) - agent dominant, sessions, durees, cache projects.json rafraichi par doctor --fix

src/config.rs

@@ -35,6 +35,9 @@ pub struct Config {
     pub include: Vec<String>,
     #[serde(default)]
     pub agents: Vec<AgentDef>,
+    /// Per-project profiles: root, default agent, env and hooks.
+    #[serde(default)]
+    pub projects: BTreeMap<String, ProjectProfile>,
 }
 
 fn default_version() -> String {
@@ -72,6 +75,23 @@ pub struct Settings {
     pub theme: Option<String>,
 }
 
+/// A project profile: everything am needs to know about one project.
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+#[serde(deny_unknown_fields)]
+pub struct ProjectProfile {
+    /// Root directory of the project (accepts ~ and env variables).
+    pub root: String,
+    /// Agent launched by 'am start' without arguments inside the project.
+    #[serde(default)]
+    pub default_agent: Option<String>,
+    /// Environment variables injected when launching the default agent.
+    #[serde(default)]
+    pub env: BTreeMap<String, String>,
+    /// Hooks: on_start / on_stop / on_install / on_update command lines.
+    #[serde(default)]
+    pub hooks: BTreeMap<String, Vec<String>>,
+}
+
 impl Settings {
     pub fn auto_install_deps(&self) -> bool {
         self.auto_install_deps.unwrap_or(true)
@@ -490,6 +510,9 @@ pub fn merge(base: &mut Config, overlay: Config) {
             base.agents.push(agent);
         }
     }
+    for (k, v) in overlay.projects {
+        base.projects.insert(k, v);
+    }
 }
 
 /// Validate a merged config. Returns a list of human-readable problems.