feat(record): add popup quick-actions launcher and make record --url optional

Add a popup launcher + action-recording panel that builds a copyable
`bsk record start` prompt, add `--browser` targeting, and default `--url`
to https://example.com/ when omitted. Drop the popup browser-alias field.

crates/bsk-cli/skill/SKILL.md

@@ -211,8 +211,8 @@ which refs/selectors matched a live element.
 Capture the user's own actions in the Agent Window to a `trace.json`, for later LLM-driven automation:
 
 ```bash
-bsk record start --url https://… [--purpose "publish a wiki doc"] [--output trace.json]
-# `--url` is required on a fresh session (about:blank cannot host the content script).
+bsk record start --browser <instance-id-or-label> [--url https://…] [--purpose "publish a wiki doc"] [--output trace.json]
+# `--url` is optional; default https://www.baidu.com/ when omitted (must be http(s)).
 # Blocks until the user clicks Finish in the recording panel, then writes ./trace.json and closes the window.
 
 bsk record stop [--output trace.json]   # terminal fallback if the browser panel is unavailable

crates/bsk-cli/src/cli/record.rs

@@ -41,12 +41,16 @@ pub enum RecordSub {
 
 #[derive(Debug, Clone, Args)]
 pub struct RecordStartArgs {
+    /// Target browser instance id or label. Required when multiple browsers
+    /// are connected; omit when only one is online.
+    #[arg(long)]
+    pub browser: Option<String>,
+
     #[arg(long = "tab-id")]
     pub tab_id: Option<i64>,
 
-    /// Navigate to this http(s) URL before recording (required for a fresh
-    /// session — Agent Window starts on about:blank, which cannot host the
-    /// content script).
+    /// Navigate to this http(s) URL before recording. When omitted, defaults
+    /// to `https://www.baidu.com/`.
     #[arg(long)]
     pub url: Option<String>,
 
@@ -81,7 +85,7 @@ fn dispatch_start(args: RecordStartArgs, format: Format) -> Result<(), CliError>
     }
 
     let info = ensure_daemon().context("ensure daemon is running")?;
-    let session = start_session(info.sock_path.clone(), None)?;
+    let session = start_session(info.sock_path.clone(), args.browser)?;
 
     let start_params = RecordStartParams {
         session_id: session.session_id.clone(),
@@ -240,6 +244,7 @@ mod tests {
     #[test]
     fn start_args_default_output_is_trace_json() {
         let args = RecordStartArgs {
+            browser: None,
             tab_id: None,
             url: None,
             purpose: None,

crates/bsk-cli/tests/cli_parse.rs

@@ -4,6 +4,7 @@ use std::time::Duration;
 
 use bsk::cli::daemon::{DaemonCmd, parse_duration};
 use bsk::cli::navigate::NavigateCmd;
+use bsk::cli::record::{RecordCmd, RecordSub};
 use bsk::{Cli, Command};
 use clap::Parser;
 
@@ -192,3 +193,37 @@ fn rejects_zero_click_count() {
         Cli::try_parse_from(["bsk", "click", "@e1", "--session", "s1", "--count", "0"]).is_err()
     );
 }
+
+#[test]
+fn parses_record_start_with_browser_and_url() {
+    let cli = parse(&[
+        "bsk",
+        "record",
+        "start",
+        "--browser",
+        "022ca8ac",
+        "--url",
+        "https://x",
+    ]);
+    let Command::Record(RecordCmd {
+        sub: RecordSub::Start(args),
+    }) = cli.command
+    else {
+        panic!("expected record start subcommand");
+    };
+    assert_eq!(args.browser.as_deref(), Some("022ca8ac"));
+    assert_eq!(args.url.as_deref(), Some("https://x"));
+}
+
+#[test]
+fn parses_record_start_without_url() {
+    let cli = parse(&["bsk", "record", "start", "--browser", "022ca8ac"]);
+    let Command::Record(RecordCmd {
+        sub: RecordSub::Start(args),
+    }) = cli.command
+    else {
+        panic!("expected record start subcommand");
+    };
+    assert_eq!(args.browser.as_deref(), Some("022ca8ac"));
+    assert!(args.url.is_none());
+}