watch : supervision d'un agent avec redemarrage automatique et backoff (issue #35) - check_once testable, notification desktop, Ctrl-C n'affecte pas l'agent detache

src/cli.rs

@@ -91,6 +91,20 @@ pub enum Command {
         /// Agent name or alias
         agent: String,
     },
+    /// Supervise an agent and optionally restart it on crash
+    Watch {
+        /// Agent name or alias
+        agent: String,
+        /// Restart the agent automatically when it dies (with backoff)
+        #[arg(long)]
+        restart: bool,
+        /// Desktop notification on every restart
+        #[arg(long)]
+        notify: bool,
+        /// Check interval in seconds (default: 5)
+        #[arg(long, value_name = "SECS", default_value = "5")]
+        interval: u64,
+    },
     /// Manage command aliases (cc -> claude-code)
     #[command(subcommand)]
     Alias(AliasCmd),