feat: add demo data for emails, files, filters, identities, mailboxes, vacation responses, and JMAP client interface

- Created demo emails with various states (inbox, sent, drafts, trash, etc.) in `emails.ts`.
- Added demo file nodes representing directories and files in `files.ts`.
- Implemented demo Sieve capabilities and scripts in `filters.ts`.
- Defined demo identities for users in `identities.ts`.
- Established demo mailboxes with permissions and counts in `mailboxes.ts`.
- Created a demo vacation response in `vacation.ts`.
- Introduced a comprehensive JMAP client interface in `client-interface.ts` to standardize interactions with the JMAP API.

components/calendar/calendar-sidebar-panel.tsx

@@ -9,7 +9,7 @@ import { CalendarColorPicker } from "@/components/settings/calendar-management-s
 import { useCalendarStore } from "@/stores/calendar-store";
 import { useSettingsStore } from "@/stores/settings-store";
 import { toast } from "@/stores/toast-store";
-import type { JMAPClient } from "@/lib/jmap/client";
+import type { IJMAPClient } from '@/lib/jmap/client-interface';
 
 interface CalendarSidebarPanelProps {
   calendars: Calendar[];
@@ -17,7 +17,7 @@ interface CalendarSidebarPanelProps {
   onToggleVisibility: (id: string) => void;
   onColorChange?: (calendarId: string, color: string) => void;
   onSubscribe?: () => void;
-  client?: JMAPClient | null;
+  client?: IJMAPClient | null;
 }
 
 export function CalendarSidebarPanel({

components/calendar/calendar-toolbar.tsx

@@ -326,7 +326,7 @@ export function CalendarToolbar({
       )}
 
       {!isMobile && (
-        <Button size="sm" onClick={onCreateEvent}>
+        <Button size="sm" onClick={onCreateEvent} data-tour="create-event-button">
           <Plus className="w-4 h-4 mr-1" />
           {t("events.create")}
         </Button>

components/calendar/event-modal.tsx

@@ -729,7 +729,7 @@ export function EventModal({
   }
 
   return (
-    <div ref={modalRef} role="dialog" aria-modal={isMobile || undefined} aria-label={isEdit ? t("events.edit") : t("events.create")} className={isMobile ? "fixed inset-0 z-50 flex flex-col bg-background" : "flex flex-col h-full bg-background"}>
+    <div ref={modalRef} role="dialog" aria-modal={isMobile || undefined} aria-label={isEdit ? t("events.edit") : t("events.create")} data-tour="event-modal" className={isMobile ? "fixed inset-0 z-50 flex flex-col bg-background" : "flex flex-col h-full bg-background"}>
         <div className="flex items-center justify-between px-6 py-4 border-b border-border flex-shrink-0">
           <h2 className="text-lg font-semibold">
             {isEdit ? t("events.edit") : t("events.create")}

components/calendar/ical-import-modal.tsx

@@ -6,14 +6,14 @@ import { Button } from "@/components/ui/button";
 import { X, Upload, Check, Loader2, RefreshCw, Globe } from "lucide-react";
 import { format, parseISO } from "date-fns";
 import type { CalendarEvent, Calendar } from "@/lib/jmap/types";
-import type { JMAPClient } from "@/lib/jmap/client";
+import type { IJMAPClient } from '@/lib/jmap/client-interface';
 import { useCalendarStore } from "@/stores/calendar-store";
 import { useSettingsStore } from "@/stores/settings-store";
 import { toast } from "@/stores/toast-store";
 
 interface ICalImportModalProps {
   calendars: Calendar[];
-  client: JMAPClient;
+  client: IJMAPClient;
   onClose: () => void;
 }
 

components/calendar/ical-subscription-modal.tsx

@@ -4,13 +4,13 @@ import { useState, useRef, useEffect, useCallback } from "react";
 import { useTranslations } from "next-intl";
 import { Button } from "@/components/ui/button";
 import { X, Loader2, Globe } from "lucide-react";
-import type { JMAPClient } from "@/lib/jmap/client";
+import type { IJMAPClient } from '@/lib/jmap/client-interface';
 import { useCalendarStore } from "@/stores/calendar-store";
 import { CalendarColorPicker } from "@/components/settings/calendar-management-settings";
 import { toast } from "@/stores/toast-store";
 
 interface ICalSubscriptionModalProps {
-  client: JMAPClient;
+  client: IJMAPClient;
   onClose: () => void;
 }