fix(cli): Stream REPL output as it arrives instead of buffering.

Author: dylan-sutton-chavez

cli/src/engine.rs

@@ -78,15 +78,19 @@ impl Session {
         let expr = format!("__edgeRun({literal})");
         self.tab.evaluate(&expr, false).map_err(|e| anyhow!("starting eval: {e}"))?;
 
-        let mut all: Vec<String> = Vec::new();
-        let outcome = drain(&self.tab, &mut |line| all.push(line.to_string()))?;
-        for line in all.iter().skip(self.history_lines) {
-            on_line(line);
-        }
+        // Stream lines as they arrive; suppress the first `history_lines` (replayed history, already shown in prior evals) with a counter instead of buffering the whole run.
+        let skip = self.history_lines;
+        let mut seen = 0usize;
+        let outcome = drain(&self.tab, &mut |line| {
+            if seen >= skip {
+                on_line(line);
+            }
+            seen += 1;
+        })?;
         if outcome.err.is_none() {
             if !self.history.is_empty() { self.history.push('\n'); }
             self.history.push_str(src);
-            self.history_lines = all.len();
+            self.history_lines = seen;
         }
         Ok(outcome)
     }