put the monitor scope in the url

/system-monitor/:scope, the same shape as /photos: route pair, one Navigate guard after the
hooks, scope list as react-router NavLinks, and both panels reading useParams instead of
agreeing over a `monitor:scope` channel. The Dock's isActive is a startsWith, so its
highlight survives the redirect off the bare route.

src/workspaces/officerdev/src/apps/SystemMonitor/MonitorMain.tsx

@@ -3,9 +3,10 @@ import { BtopView } from './BtopView';
 import { Pm2View } from './Pm2View';
 import { DockerView } from './DockerView';
 
-// Right panel — renders whichever scope the left ScopeList selected (default: bTop).
+// Right panel — renders whichever scope the URL names. It does not hear from the ScopeList; both read
+// `/system-monitor/:scope`.
 export const MonitorMain = ({ panelId: _panelId }: { panelId: string }) => {
-  const [scope] = useMonitorScope();
+  const scope = useMonitorScope();
   if (scope === 'pm2') return <Pm2View />;
   if (scope === 'docker') return <DockerView />;
   return <BtopView />;

src/workspaces/officerdev/src/apps/SystemMonitor/ScopeList.tsx

@@ -1,29 +1,29 @@
+import { NavLink } from 'react-router';
 import { Cpu, Server, Boxes } from 'lucide-react';
-import { useMonitorScope, SCOPES, type MonitorScope } from './shared';
+import { SCOPES, monitorScopePath, type MonitorScope } from './shared';
 
-// Left panel — a single-column list of scopes; selecting one drives the right panel via the channel.
+// Left panel — a single-column list of scopes. Each is a react-router NavLink to /system-monitor/<scope>,
+// so active state comes from the router and a scope can be linked, bookmarked and cmd-clicked.
 const ICONS: Record<MonitorScope, typeof Cpu> = { btop: Cpu, pm2: Server, docker: Boxes };
 
-export const ScopeList = ({ panelId: _panelId }: { panelId: string }) => {
-  const [scope, setScope] = useMonitorScope();
-  return (
-    <div className="flex h-full flex-col overflow-y-auto p-3">
-      {SCOPES.map((s) => {
-        const Icon = ICONS[s.id];
-        return (
-          <button
-            key={s.id}
-            type="button"
-            onClick={() => setScope(s.id)}
-            className={`flex items-center gap-2 rounded-md px-2 py-1.5 text-left text-sm ${
-              scope === s.id ? 'bg-muted text-foreground' : 'text-muted-foreground hover:bg-muted/60 hover:text-foreground'
-            }`}
-          >
-            <Icon size={15} className="shrink-0" />
-            <span className="truncate">{s.label}</span>
-          </button>
-        );
-      })}
-    </div>
-  );
-};
+export const ScopeList = ({ panelId: _panelId }: { panelId: string }) => (
+  <div className="flex h-full flex-col overflow-y-auto p-3">
+    {SCOPES.map((s) => {
+      const Icon = ICONS[s.id];
+      return (
+        <NavLink
+          key={s.id}
+          to={monitorScopePath(s.id)}
+          className={({ isActive }) =>
+            `flex items-center gap-2 rounded-md px-2 py-1.5 text-left text-sm ${
+              isActive ? 'bg-muted text-foreground' : 'text-muted-foreground hover:bg-muted/60 hover:text-foreground'
+            }`
+          }
+        >
+          <Icon size={15} className="shrink-0" />
+          <span className="truncate">{s.label}</span>
+        </NavLink>
+      );
+    })}
+  </div>
+);

src/workspaces/officerdev/src/apps/SystemMonitor/shared.ts

@@ -1,18 +1,30 @@
-import { usePanelChannel } from 'hooks/usePanelChannel';
+import { useParams } from 'react-router';
 
-// The left panel picks a scope; the right panel renders it. Coordinated over a panel channel, like the
-// /music browser → detail split.
+// The left panel picks a scope and the right panel renders it, and neither tells the other: the scope is
+// `/system-monitor/:scope`. It used to be a `monitor:scope` panel channel, which meant the URL said
+// `/system-monitor` however deep you were — nothing to link, nothing to bookmark, and the list came back
+// on whatever you last clicked in some other tab.
 export type MonitorScope = 'btop' | 'pm2' | 'docker';
 
-export const MONITOR_SCOPE_CHANNEL = 'monitor:scope';
-
 export const SCOPES: { id: MonitorScope; label: string }[] = [
   { id: 'btop', label: 'bTop' },
   { id: 'pm2', label: 'pm2 processes' },
   { id: 'docker', label: 'dockers' },
 ];
 
-export const useMonitorScope = () => usePanelChannel<MonitorScope>(MONITOR_SCOPE_CHANNEL, 'btop');
+/** Where /system-monitor lands, and where an unrecognised scope redirects to. */
+export const DEFAULT_MONITOR_SCOPE: MonitorScope = 'btop';
+
+export const isMonitorScope = (value: string | undefined): value is MonitorScope => SCOPES.some((s) => s.id === value);
+
+export const monitorScopePath = (scope: MonitorScope) => `/system-monitor/${scope}`;
+
+// SystemMonitorScreen redirects anything unrecognised, so the fallback here only covers the instant before
+// that lands.
+export const useMonitorScope = (): MonitorScope => {
+  const { scope } = useParams();
+  return isMonitorScope(scope) ? scope : DEFAULT_MONITOR_SCOPE;
+};
 
 export function fmtBytes(n: number): string {
   if (!n) return '0 B';

src/workspaces/officerdev/src/index.ts

@@ -43,6 +43,10 @@ export type { PhotosSectionId } from './apps/Photos/shared';
 export { DEFAULT_JELLYFIN_SECTION, jellyfinSectionPath, isJellyfinSection } from './apps/Jellyfin/shared';
 export type { JellyfinSectionId } from './apps/Jellyfin/shared';
 
+// Same for /system-monitor, where the param is the scope rather than a section.
+export { DEFAULT_MONITOR_SCOPE, monitorScopePath, isMonitorScope } from './apps/SystemMonitor/shared';
+export type { MonitorScope } from './apps/SystemMonitor/shared';
+
 // Same for /transmission.
 export {
   DEFAULT_TRANSMISSION_SECTION,