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.

apps/extension/src/entrypoints/popup/features.ts

@@ -0,0 +1,22 @@
+import { RiRecordCircleLine } from "@remixicon/react";
+import type { RemixiconComponentType } from "@remixicon/react";
+
+export type PopupFeatureId = "record";
+
+export type PopupView = "main" | "features" | PopupFeatureId;
+
+export type PopupFeature = {
+  id: PopupFeatureId;
+  icon: RemixiconComponentType;
+  titleKey: "popup.record.sectionTitle";
+  descKey: "popup.record.cardDesc";
+};
+
+export const POPUP_FEATURES: PopupFeature[] = [
+  {
+    id: "record",
+    icon: RiRecordCircleLine,
+    titleKey: "popup.record.sectionTitle",
+    descKey: "popup.record.cardDesc",
+  },
+];