feat(click): report (and optionally --follow) a tab opened by a click (#24-A)

A click on a target=_blank link / window.open opened a new tab, but the active
tab stayed put, so the post-click snapshot showed the OLD page — looking exactly
like the click failed. On the relay the new tab is discovered only via getTargets
(the relay doesn't push target events to the daemon), so it went unsurfaced.

handle_click now snapshots tracked targets before the click and, after, runs a
lightweight BrowserManager::adopt_newly_opened (one getTargets, attaches only the
new target — far cheaper than a full resync) to detect a freshly-opened tab. It's
reported as openedTab {tabId,url,title} in the response (and a '→ opened new tab
[tN] <url>' hint in text mode). Default keeps focus on the current tab (so
multi-tab flows aren't hijacked, per #7/#8.1); 'click <sel> --follow' switches to
the new tab. Verified live: clicking a _blank link prints
'→ opened new tab [t13] https://example.org/'.

Completes the #24 friction items (B/C/D shipped in 770708b).

cli/src/native/actions.rs

@@ -3116,6 +3116,15 @@ async fn handle_click(cmd: &Value, state: &mut DaemonState) -> Result<Value, Str
 
     let button = cmd.get("button").and_then(|v| v.as_str()).unwrap_or("left");
     let click_count = cmd.get("clickCount").and_then(|v| v.as_i64()).unwrap_or(1) as i32;
+    let follow = cmd.get("follow").and_then(|v| v.as_bool()).unwrap_or(false);
+
+    // Snapshot tracked targets so we can tell if this click opened a NEW tab
+    // (target=_blank link / window.open). On the relay the new tab is discovered
+    // passively and doesn't steal focus (#7/#8.1), so without surfacing it the
+    // post-click snapshot shows the OLD page and looks like the click failed
+    // (issue #24-A).
+    let before: std::collections::HashSet<String> =
+        mgr.pages_list().into_iter().map(|p| p.target_id).collect();
 
     interaction::click(
         &mgr.client,
@@ -3128,7 +3137,26 @@ async fn handle_click(cmd: &Value, state: &mut DaemonState) -> Result<Value, Str
     )
     .await?;
 
-    Ok(json!({ "clicked": selector }))
+    // Give a just-opened tab a moment to register, then look for it.
+    let mgr = state.browser.as_mut().ok_or("Browser not launched")?;
+    tokio::time::sleep(std::time::Duration::from_millis(150)).await;
+    let opened = mgr.adopt_newly_opened(&before).await;
+
+    let mut out = json!({ "clicked": selector });
+    if let Some(page) = opened {
+        let tab_id = super::browser::format_tab_id(page.tab_id);
+        out["openedTab"] = json!({ "tabId": tab_id, "url": page.url, "title": page.title });
+        // `--follow`: switch the active tab to the newly-opened one (default is
+        // to report it but stay put, so multi-tab flows aren't hijacked).
+        if follow {
+            state.ref_map.clear();
+            state.iframe_sessions.clear();
+            state.active_frame_id = None;
+            let _ = mgr.tab_switch_by_id(page.tab_id).await;
+            out["followed"] = json!(true);
+        }
+    }
+    Ok(out)
 }
 
 async fn handle_dblclick(cmd: &Value, state: &mut DaemonState) -> Result<Value, String> {