Dashboard customize mode: reorder/hide modules and individual rows, layout saved server-side (GET/PUT /api/prefs/dashboard)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

web/src/api.ts

@@ -38,7 +38,13 @@ export interface Series {
   temp: Record<string, number[]>
 }
 
+// Dashboard layout. `order` lists module ids top-to-bottom; `hidden` are modules switched
+// off; `hiddenItems` are individual rows ("net:wlp1s0", "fs:/boot/efi", "disk:sda", "temp:chip/label").
+export interface DashPrefs { order?: string[]; hidden?: string[]; hiddenItems?: string[] }
+
 export const api = {
+  dashPrefs: () => req<DashPrefs>('GET', '/api/prefs/dashboard'),
+  saveDashPrefs: (p: DashPrefs) => req<void>('PUT', '/api/prefs/dashboard', p),
   metrics: () => req<Sample>('GET', '/api/metrics'),
   metricsHistory: () => req<Series>('GET', '/api/metrics/history'),
   login: (password: string) => req<void>('POST', '/api/login', { password }),