Drop cookie import; click-through notifications; per-app zoom

The cookie import is gone. It worked mechanically - 43 cookies decrypted
from Arc and verifiably visible to the page - but Google, Microsoft and
Odoo all refused the imported sessions, because each binds a session to
the browser that created it. Signing in once inside the app is simpler
and actually works, so the whole path is deleted rather than kept as a
feature that mostly fails. That takes rusqlite, aes, cbc, pbkdf2, hmac,
sha1 and sha2 out of the build with it.

Notifications are now raised through mac-notification-sys rather than
Tauri's notification plugin, because the plugin cannot report that one
was clicked. A click switches to the app that raised it and then runs
the page's own click handler - the only thing that knows which message
the notification was about.

Zoom is per app, on a fixed ladder so Cmd+0 returns to exactly 100%.
The shortcuts are menu-bar accelerators rather than a key listener,
since the keystroke has to work while a remote page has focus.

The hidden-element count is off the nav rows.

src/App.tsx

@@ -6,7 +6,7 @@ import Nav from "./components/Nav";
 import Settings from "./components/Settings";
 import { BTN_PRIMARY } from "./components/ui";
 import { useAppearance, type Theme } from "./hooks/useAppearance";
-import type { Config, Group, HiddenEvent, SwitchEvent } from "./types";
+import type { Config, Group, HiddenEvent, NotificationClick, SwitchEvent } from "./types";
 
 export default function App() {
   const [config, setConfig] = useState<Config | null>(null);
@@ -89,6 +89,20 @@ export default function App() {
         setFocusHidden(e.payload);
         setSettingsOpen(true);
       }),
+      // A macOS banner was clicked. Switch to the app that raised it, then let
+      // that page's own handler run — it is the only thing that knows which
+      // message the notification was about.
+      listen<NotificationClick>("notification-clicked", async (e) => {
+        await api.focusWindow();
+        setSettingsOpen(false);
+        setActiveId(e.payload.appId);
+        await api.setActive(e.payload.appId);
+        await api.notificationClick(e.payload.appId, e.payload.notificationId);
+      }),
+      // Zoom changed from the menu bar; keep Settings' sliders honest.
+      listen<[string, number]>("zoom-changed", () => {
+        void api.getConfig().then(setConfig);
+      }),
     ];
     return () => {
       unlisten.forEach((p) => p.then((f) => f()));