MS Graph: createReplyDraftDirect uses broken $filter=conversationId pattern

[edwinhu]

Bug

createReplyDraftDirect() in src/token-api.ts uses $filter=conversationId eq '...' at /me/messages, which returns InefficientFilter / 400 errors on MS Graph. This breaks:

• superhuman reply --attach <file> for Outlook accounts
• superhuman reply-all --attach <file> for Outlook accounts
• Any code path that calls createReplyDraftDirect() or sendReplyDirect() with an MS Graph token

Root Cause

The broken pattern at line 2785:

/me/messages?$filter=conversationId eq '${threadId}'&$select=id&$orderby=receivedDateTime desc&$top=1

This is a known MS Graph limitation (documented in memory). The same bug was previously fixed in getThreadInfoDirect() by switching to client-side filtering.

Fix

Replace server-side $filter with the client-side filtering pattern already used by getThreadInfoDirect():

1. Fetch recent 50 messages
2. Filter by conversationId client-side
3. Fallback: try treating threadId as a direct message ID

Impact

• Outlook/MS Graph accounts cannot reply with attachments
• Gmail accounts are unaffected (different code path)