feat: add browser automation commands (v0.6.0)

Navigation: open-wait (open + block until loaded)
DOM: key, hover, check/uncheck, clear, focus, submit, poll, scroll, select, eval, wait-for
Tabs: pin/unpin, screenshot, watch-url (block until URL matches regex)
New command groups: page info, storage get/set, cookies list/get/set
Extension: add cookies permission

browser_cli/commands/tabs.py

@@ -1,3 +1,4 @@
+import base64
 import click
 from browser_cli.client import BrowserNotConnected, active_browser_targets, send_command
 from rich.console import Console
@@ -236,3 +237,54 @@ def tabs_unmute(tab_id):
     result = _handle("tabs.unmute", {"tabId": tab_id})
     target = result.get("tabId", tab_id) if isinstance(result, dict) else tab_id
     console.print(f"[green]Unmuted tab {target}[/green]")
+
+
+@tabs_group.command("pin")
+@click.argument("tab_id", type=int, required=False)
+def tabs_pin(tab_id):
+    """Pin the active tab or a specific tab."""
+    result = _handle("tabs.pin", {"tabId": tab_id})
+    target = result.get("tabId", tab_id) if isinstance(result, dict) else tab_id
+    console.print(f"[green]Pinned tab {target}[/green]")
+
+
+@tabs_group.command("unpin")
+@click.argument("tab_id", type=int, required=False)
+def tabs_unpin(tab_id):
+    """Unpin the active tab or a specific tab."""
+    result = _handle("tabs.unpin", {"tabId": tab_id})
+    target = result.get("tabId", tab_id) if isinstance(result, dict) else tab_id
+    console.print(f"[green]Unpinned tab {target}[/green]")
+
+
+@tabs_group.command("watch-url")
+@click.argument("pattern")
+@click.option("--tab", "tab_id", type=int, default=None, help="Tab ID (default: active tab)")
+@click.option("--timeout", type=float, default=30.0, show_default=True, help="Max seconds to wait")
+def tabs_watch_url(pattern, tab_id, timeout):
+    """Wait until the active (or specified) tab URL matches regex PATTERN."""
+    result = _handle("tabs.watch_url", {"pattern": pattern, "tabId": tab_id, "timeout": int(timeout * 1000)})
+    url = result.get("url", "") if isinstance(result, dict) else ""
+    console.print(f"[green]URL matched:[/green] {url}")
+
+
+@tabs_group.command("screenshot")
+@click.argument("output", required=False, metavar="FILE")
+@click.option("--tab", "tab_id", type=int, default=None, help="Tab ID (default: active tab)")
+@click.option("--format", "fmt", type=click.Choice(["png", "jpeg"]), default="png", show_default=True)
+@click.option("--quality", type=int, default=None, help="JPEG quality 0-100")
+def tabs_screenshot(output, tab_id, fmt, quality):
+    """Capture a screenshot of the active (or specified) tab.
+
+    Saves to FILE if given, otherwise prints the base64 data URL.
+    """
+    result = _handle("tabs.screenshot", {"tabId": tab_id, "format": fmt, "quality": quality})
+    data_url = result.get("dataUrl", "") if isinstance(result, dict) else ""
+    if output:
+        header = f"data:image/{fmt};base64,"
+        raw = base64.b64decode(data_url[len(header):])
+        with open(output, "wb") as f:
+            f.write(raw)
+        console.print(f"[green]Screenshot saved:[/green] {output}")
+    else:
+        console.print(data_url)