Dashboard Mail Module

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## {HH:MM} - {Action Taken}
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Mail integration module for aggregating multiple email accounts into a unified dashboard widget and page.

Architecture

src/modules/mail/
├── actions.ts              # Server actions (CRUD for accounts)
├── types.ts                # TypeScript types and utilities
├── index.ts                # Module exports
├── components/
│   ├── mail-widget.tsx     # Dashboard widget (compact)
│   ├── mail-list.tsx       # Message list view
│   ├── mail-item.tsx       # Individual message row
│   ├── account-tabs.tsx    # Account switcher tabs
│   ├── account-card.tsx    # Account display card
│   └── bulk-action-bar.tsx # Bulk action toolbar
└── lib/
    ├── outlook-client.ts   # Microsoft Graph API client
    ├── gmail-client.ts     # Gmail API client (placeholder)
    ├── imap-client.ts      # Custom IMAP client (placeholder)
    ├── token-manager.ts    # Encrypted credential storage
    ├── cache.ts            # Redis caching layer
    └── rate-limiter.ts     # API rate limiting

src/app/mail/
├── page.tsx                # Full mail page
└── settings/
    └── page.tsx            # Account management UI

Database Schema

Tables

mail_account_settings - Per-user account configurations

mail_oauth_tokens - Encrypted credentials (AES-256-GCM)

Known Schema Gap

IMAP needs additional columns for custom server settings:

• imap_host (text) - Server hostname
• imap_port (integer) - Server port (default 993)

Currently IMAP falls back to env vars IMAP_HOST, IMAP_PORT which is a placeholder workaround.

Providers

Outlook OAuth Setup

Required env vars:

GRAPH_CLIENT_ID=
GRAPH_CLIENT_SECRET=
GRAPH_REDIRECT_URI=

Gmail OAuth Setup

Required env vars:

GMAIL_CLIENT_ID=
GMAIL_CLIENT_SECRET=
GMAIL_REDIRECT_URI=

IMAP Setup (Placeholder)

Current env vars (temporary until DB columns added):

IMAP_HOST=
IMAP_USER=
IMAP_PASS=
IMAP_PORT=993

Key Types

type MailProvider = "outlook" | "gmail" | "imap";

interface MailAccount {
  id: string;
  provider: MailProvider;
  accountName: string;
  emailAddress: string;
  isEnabled: boolean;
  syncFrequencyMinutes: number;
}

interface MailMessage {
  id: string;
  subject: string;
  from: MailAddress;
  receivedAt: Date;
  isRead: boolean;
  preview: string;
}

type BulkActionType = "markRead" | "markUnread" | "moveToJunk" | "delete";

Server Actions

Caching

Redis caching via Upstash with keys:

• mail:summary:{userId} - Account summaries
• mail:messages:{accountId}:{folder} - Message lists
• mail:account:{accountId} - Account details

Security

• Tokens encrypted with AES-256-GCM using MAIL_ENCRYPTION_KEY
• Each token has unique IV and auth tag
• RLS policies restrict access to owner's data only
• Refresh tokens stored separately with own IV/auth tag

Settings UI

Located at /mail/settings:

• Add account: Select provider → Enter name/email → OAuth or credential flow
• Toggle accounts on/off
• Delete accounts with confirmation dialog
• Provider dropdown: Gmail, Outlook, IMAP (Custom)

TODO

1. Add imap_host and imap_port columns to mail_account_settings
2. Update settings form to collect IMAP server details when provider is "imap"
3. Implement Gmail client
4. Implement IMAP client using imap npm package
5. Add OAuth callback routes for Gmail