feat(ecc2): add crash resume session recovery

ecc2/src/main.rs

@@ -45,6 +45,11 @@ enum Commands {
         /// Session ID or alias
         session_id: String,
     },
+    /// Resume a failed or stopped session
+    Resume {
+        /// Session ID or alias
+        session_id: String,
+    },
     /// Run as background daemon
     Daemon,
     #[command(hide = true)]
@@ -99,6 +104,10 @@ async fn main() -> Result<()> {
             session::manager::stop_session(&db, &session_id).await?;
             println!("Session stopped: {session_id}");
         }
+        Some(Commands::Resume { session_id }) => {
+            let resumed_id = session::manager::resume_session(&db, &session_id).await?;
+            println!("Session resumed: {resumed_id}");
+        }
         Some(Commands::Daemon) => {
             println!("Starting ECC daemon...");
             session::daemon::run(db, cfg).await?;
@@ -115,3 +124,19 @@ async fn main() -> Result<()> {
 
     Ok(())
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn cli_parses_resume_command() {
+        let cli = Cli::try_parse_from(["ecc", "resume", "deadbeef"])
+            .expect("resume subcommand should parse");
+
+        match cli.command {
+            Some(Commands::Resume { session_id }) => assert_eq!(session_id, "deadbeef"),
+            _ => panic!("expected resume subcommand"),
+        }
+    }
+}